Patent Application
20120232749
1. Field of the Invention
This disclosure relates to the field of safety devices for detection of unattended children within a vehicle.
2. Description of Related Art
Every summer there are stories on the news of children being inadvertently left in vehicles by a parent or guardian. Many of these stories have a relatively happy ending as the child is noticed by a passerby, rescued from the vehicle before suffering any adverse consequences, and the grateful parent discusses how thankful they are for others being observant. The more tragic stories result in the avoidable death of a child and generally the devastation of a family.
One thing that these stories often bring to a forefront of discussion is whether the potential danger present from a parent leaving a child in the vehicle should result in criminal charges being brought against the parent for endangering the child. As part of this, there is always significant hand-wringing over how a parent could possibly be so forgetful. Talking to many parents that have not yet left a child in a vehicle, the thought of it being accidental is simply unbelievable. Yet, when you talk to a parent that has inadvertently left a child in a vehicle (with whatever consequences) you quickly discover that up until they actually did it, they had a similar opinion.
The simple fact of life in today's world is that it is hectic and many people only get through the day operating purely on habit and routine. There is probably no greater routine breaking event than the birth of a child. Such an event will greatly change the lives of the parents in a myriad of different ways and for anybody who is forced to live a hectic schedule it is easy to see how a parent, simply acting as they did before they had the child, can inadvertently forget that the child is in the back of the vehicle at this particular time. This problem is compounded by the fact that both parents generally share child transportation duties in today's world, and often do so along a relatively random schedule. Therefore, on any given day at any given time either parent may or may not be transporting a child.
Still further, the very features designed to make automobiles safer to operate and to keep children safe in them contribute to the problem. With the addition of airbags and safer car seats, children are now generally placed in the back seat of the vehicle, instead of in the front seat where they were more easily seen by a parent departing the vehicle, particularly if the child is asleep or quiet. Further, with rear facing car seats it can often be difficult to see if the seat is occupied. This all makes it easier for a frazzled parent to forget the child is there. As the old adage goes, “out of sight, out of mind.”
While new parents may not be used to thinking about having a child in the vehicle at all, parents of older children can often forget if the child is in the vehicle because the child's car seat or other indications of the child become near permanent fixtures in their vehicle, whether or not the child is present, and routines may not be greatly altered by the presence of the child. Therefore, a change in routine such as when the child is being dropped off at daycare, which parent has the child today, or even a non-standard trip where the child is brought along can result in the child being inadvertently left unattended in the vehicle.
Beyond the child being inadvertently left in the vehicle by a parent, children are also inquisitive and an older child may get into a parked vehicle without a parent knowing. This situation can be just as dangerous as leaving an unattended child in the vehicle, but may be much harder for a parent to detect since the parent was not involved in the child getting into the vehicle originally.
For these and other reasons there are described herein systems and methods which are designed to provide an alarm or other reminder that a child is likely present in a parked vehicle. These can range from subtle audio reminders designed to remind a parent as they are parking a vehicle that the child is present, to blaring audio and visual reminders to try and trigger the attention of passers-by to remote communication systems designed to locate necessary assistance, to systems designed to detect that a child has gotten into an unattended vehicle.
Described herein are a number of embodiments of child vehicle seat safety systems and associated methods that use sensors to determine if a child is in a vehicle unattended or attended, in their seat or not, vehicle moving or not.
Described herein is a system for providing remote notice that a child is in a car seat comprising: a child detector placed in a vehicle, the child detector detecting the presence of a child in a vehicle; a motion sensor, the motion sensor detecting that the vehicle is in motion; a computer processor obtaining the output of the child detector and the motion sensor and determining if a child is in the vehicle when the vehicle is not in motion; and a communication device for transmitting the determination of the processor to a receiver, the receiver displaying to a user a result of the determination.
In an embodiment the system further comprises a temperature sensor whose output is obtained by the computer processor. Output of the temperature sensor may also be displayed on the receiver. If the output of the temperature sensor is above a specified range, a warning is sent to the receiver and/or the receiver is instructed to initiate an action to lower the temperature.
In an embodiment of the system the child detector comprises a pressure sensor.
In embodiments of the system the motion sensor comprises an accelerometer which may be a multi-dimensional accelerometer or a 3-axis accelerometer.
In embodiments of the system the receiver is a smartphone, a tablet computer, or a component of the vehicle which may control features of the vehicle such as, but not limited to, activation of a climate control system, starting the vehicle, activating or deactivating car door locks, adjusting airbag strength, or enabling or disabling airbags.
In an embodiment of the system the communication device communicates using radio frequency communications.
In embodiments of the system the receiver determines if the receiver is moving away from the vehicle. If the receiver determines if the receiver is moving away from the vehicle and the processor determines that there is a child in the vehicle, the receiver can issue an alarm. The receiver can also determine if the receiver is moving out of range of the communication device.
There is also described herein a system for providing remote notice that a child is in a car seat comprising: means for detecting a child placed in a vehicle; means for detecting that the vehicle is in motion; means for obtaining the output of the child detector and the motion sensor and determining if a child is in the vehicle when the vehicle is not in motion; and means for transmitting the determination to a remote receiver, the receiver displaying to a user a result of the determination.
There is also described herein a receiver for providing remote notice that a child is in a car seat, the receiver comprising a computer readable memory, the memory including: computer readable instructions for receiving indications from a remote monitor as to whether or not: a child is present in a vehicle; the vehicle is not in motion; and the temperature of the vehicle; computer readable instructions for displaying the indications to a user; and computer readable instructions for issuing an alarm should a child be present in the vehicle and the vehicle not be in motion.
In an embodiment, the receiver comprises a smartphone and the receiver can automatically pair with the remote monitor when in communication range of the remote monitor.
Generally the notification systems (200) and methods discussed herein include four major components which may be arranged in a variety of configurations. Generally the systems (200) will be configured to include a car seat portion or monitor (2000) which is intended to be used as a part of or in conjunction with a car seat. The monitor (2000) may comprise all the major components in an integrated system (such as the Embodiment of
Regardless of whether components are in the monitor (2000) or not, the system will generally comprise an alarm or reminder system (211) which serves as the indicator to determine if an unattended child (101) is present or to act as a reminder that a child (101) may be present and needs to be attended to. In some embodiments this alarm (211) is part of the monitor (2000) while in others the monitor (2000) utilizes external systems (such as those of a vehicle (105) or a smartphone(215)) to provide the alarm.
The systems and methods also generally include a child detector (201), which serves to determine if there is an increased likelihood of a child (101) being present in a car seat (100) or in the vehicle (105) and therefore it is appropriate to trigger the alarm (211) should the vehicle (105) be parked. The child detector (201) will generally be part of the monitor (2000) and operate directly on the seat (100), seat cushion, or seat cover, but in alternative embodiments could be a system attached directly to or part of the vehicle (105).
The systems and methods also include a detection apparatus or motion sensor (221) whose purpose is to determine if the vehicle (105) is in operation. Generally, these sensors (221) are used to determine if the vehicle (105) is in motion, being physically displaced, or “not parked.” In a preferred embodiment, the motion sensor (221) comprises an accelerometer which is attached directly to the seat (100), but in alternative embodiments systems such as vehicle wheel rolling detectors can serve the purpose.
Finally, the system (200) and methods will generally include a computer processor (microprocessor) or similar controller (231) which serves to coordinate and control the various other components and operate the system (200). The controller (231) will generally be headquartered in the monitor (2000) so as to place control for the system (200) on-board the seat (100) and avoid the need to reprogram the vehicle (105) to control the system (200). However in an alternative embodiment the controller (231) may be part of the vehicle (215) or external to the vehicle (105).
A major problem with prior child detection systems is that they require the vehicle operator to manually arm them or make sure they are switched on when they begin use of the vehicle (105) because otherwise the systems (200) could indicate alerts when the vehicle (105) was simply driving down the road or could be constantly triggering even if the child (101) was not in a car seat (100). The problem with any such system is that it is just as easy to forget to arm the system when the child (101) is using the seat (100), as it is to leave the unattended child (101) in the vehicle (105). For this reason, the systems (200) discussed herein will preferably be armed by placement of the child (101) in the car seat (100) and/or by placement of the seat (100) in a vehicle (105). In this way, when the child (101) is in the vehicle (105) the system (200) is automatically armed.
As shown if
While it will generally be the case that the monitor (2000) will be used on or in conjunction with a child car seat (100), it is by no means required and the systems and devices (200) can operate without need of such a car seat (100). However, children who are generally old enough to not need any form of car seat (100), are also generally old enough to call for help and/or to extract themselves from the vehicle (105) should they be left. Children (101) in safety seats (100) are much more dependent on their parents as they are less likely to speak out or indicate that they are about to be forgotten, they are often asleep, and they generally cannot reach or operate the car doors to exit the vehicle (105) themselves. Even if they can, they may not be aware that remaining alone in the vehicle (105) is dangerous. In an alternative embodiment, the car seat (100) is eliminated as the monitor (2000) can be used to detect a pet, child, or other actor that is laying on or otherwise sitting in a seat, in the storage area, or in a confined carrier placed in the vehicle (105).
A first embodiment of a notification device is shown in
The embodiment of
As shown in
The system and methods are generally designed to provide for two different situations effectively following a logical chain of operation. If the seat (100) is likely occupied by a child (101) and the vehicle (105) is not currently in motion, the systems and methods are designed to initiate a notification sequence which will result in an alarm situation. Otherwise, the system (200) will generally sleep and not trigger an alarm unless it is also being used to monitor other statuses such as if the child has gotten out of the seat. In this way the alarm will not be triggered if either, the car seat (100) is unoccupied (unless it detects that a child has left the seat while the vehicle is in motion), or the vehicle (105) is in operation and therefore the parent is likely present and also in the vehicle (105). In an alternative embodiment, the system (200) can also detect that a child (101) has left the seat (100) while the vehicle is in motion.
As shown in
In a preferred embodiment of the system (200), the system (200) is generally never “off.” Instead, the system (200) is always armed and either is indicating notification or the notification is temporarily disabled. However, in an alternative embodiment, the system (200) can be turned off for long term storage or disuse. Generally, however, such ability to turn the system (200) off will not be simple and may involve removing a battery (203) or otherwise disconnecting a power source so that it is not done casually or simply.
In one embodiment, the device (200) may include a temporary disarm button (209) which is used so that the device need not be turned off when the seat is removed from the vehicle (105). This embodiment is depicted in
The temporary disarm (209) is to allow for the device (200) to be active when the child (101) is in the seat (100) but the seat (100) is not in the vehicle (105) or otherwise being used in a fashion that serves to disable the notification as discussed below. For this reason, a hardwire disarm button of
This temporary disarm (201) is provided so that the child (101) may remain in the seat (100) with the seat (400) being placed on a stationary surface without the alarm being triggered. In this way, the system (200) is not distracting or annoying because it provides notification when the seat (100) is not in a vehicle (105) or when parents are aware of the situation, but need additional time to remove the child. For example, if the system was used in conjunction with driving, the user then arrived at their location and knew that the child (101) was going to remain in the seat (100) but the system (200) may be triggered (for example if the user was in church or at a movie), the user could disarm (209) the system (200) for the amount of time that they would be out of the vehicle (105), it would then automatically rearm after that time.
In a still further embodiment, the system could include a rearm switch so that if the time spent outside the vehicle (105) was less than was expected, the user could immediately rearm the system (200) instead of having to wait out the temporary disarm to time out. In an embodiment, this rearm could occur automatically by the system detecting the child (101) being removed from the seat (100).
In the depicted embodiments of
The method for determining occupancy can take a variety of forms. In the embodiment of
In alternative embodiments, other child sensing systems (201) may be used. For instance, a child's body heat, or volume, instead of mass, could be detected. Such a sensor could detect that there is a warm object placed in the car seat (100), or could detect that an object having a particular volume is present. For instance, sufficient to break an invisible “line” between a transmitter and detector on opposing sides of the seat (100). Such sensors may be optical (e.g. an infra red emitter detector pair) acoustic, piezo-electric, force sensitive, capacitive, infra-red, mechanical, vision systems, or of any other type known to one of ordinary skill in the art.
In one such alternative a motion detector which may be a different function of the motion sensor (221) can be used as the child detector (201). This will generally determine if there is motion in the general area of the seat (100), for instance, as viewed from the back of a front seat. This can be the most optimal detection system for larger children where they may be on a booster seat or more open seat where they can move and possibly move off of a different type of sensor and are less likely to have fallen asleep.
In an embodiment, an infra red sensor can be used, although other sensors can be used such as, but not limited to, acoustic, radar capacitive or one could tie into one of the vehicle (105)'s existing sensors, transmitters, or vehicle (105) electronic system to establish the presence of an intruder. Examples of this are the airbag sensor used to determine the occupant's size and weight or the sensor used to level the vehicle's (105) suspension or the sensor that detects the presence of an occupant for the seat belt fastener. It should be apparent that a motion sensing system may be more useful for larger children (or in an alternative embodiment for pets) where they may not be confined to a car seat.
In a still further embodiment, detection of the child (101) can be through the use of a secondary indicator. For example, the detector (201) may not detect the child but may detect an indication that a child could be present. For example, the detector (201) could detect that the seat belt in the seat (100) is fastened, that the straps have been tightened recently, or that the orientation of a seat has changed (likely to a mass being placed on it). These types of detectors (201) only indirectly detect the child (100) as they detect a situation that commonly occurs when a child is present instead.
The system (200) can also interface with the seat belt buckle internally or externally which can indicate to the controller (231) when the seat belt buckles are latched. Such information can be used by itself or in conjunction with the child detector (201). Similarly, the controller (231) could be part of the seat belt strap, where tension on the strap can indicate presence of a child. Tension sensors can be integral to the seat belt strap and/or buckle, or could be part of a mechanism that holds the strap to the structure that secures the seat belt strap to the seat (100) in such an embodiment.
While the above contemplates detection of temperature to detect the heat of a child in a seat, it should be recognized that in another embodiment the system (200) can include a temperature sensor to detect the heat a child (100) may be exposed to. It is well recognized that one of the principle dangers of a child (100) being left in a vehicle (105) is that the vehicle (105) will often heat up and the child will suffer hyperthermia. A temperature sensor (208) can be provided which allows for the temperature inside the vehicle (105) to reported as part of the system (200) as part of triggering the alarm (211). By reporting the temperature, the individual receiving the alarm signal can recognize the potential severity of risk immediately and that may trigger additional or alternative action. For instance, if the temperature is already approaching a highly dangerous level, the receiver may take more drastic or immediate action such as remote starting the vehicle (105) or activating climate control systems instead of trying to return to it.
In addition to the use of a temperature in conjunction with determination of a child (101) being left in the vehicle (105), the temperature sensing component can be used alone. Specifically, the temperature sensor can present a specific alarm indicative that the temperature is too high in the cabin, and, even if the parent is also determined to be present, an alarm can be sent to them trying to get them to lower the temperature, or the vehicle can be directly instructed to engage a climate control system. The thresholds for temperature and associated alerts can be set by the user, in an embodiment, as shown in
In a still further embodiment, one would recognize that the system (200) can be operated effectively in reverse to provide an alternative protection system (200). If the parent is concerned about a child possibly undoing a seat belt or getting out of the seat (100) while the vehicle (105) is moving, an alarm (211) could also be triggered by the sensing of the child (101) moving outside the seat (100) area, or detection that the child (101) is no longer in the seat (100). This alternative mode of operating can simply provide for a different notification sound in the embodiments of
This embodiment and operational method may be particularly beneficial for slightly older children where the risk of them being left unattended is decreased, but their increased independence could result in such a dangerous situation with them not being properly restrained. In an embodiment, the system (200) may include the ability to switch between these modes so as to provide for increased functionality or to operate in both modes simultaneously.
Child detection systems (201), such as those discussed above can be used singly, or in combination, depending on the embodiment, to arm the system (200). For example, a mass sensor may be used to detect the presence of a small child in a carrycot or other hand carrying portion of a car seat (100). A volume detector may then be used to determine if the carrycot or hand carrying portion has been connected to a mounting system located in the vehicle (105) which is designed to secure the child (101) in the vehicle (105) without need of transferring the child (101) between carriers. Unless both systems indicate the presence of the child (101), then the system (200) remains disarmed. In this way, a child (101) does not need to be removed from the seat (100) to disarm the system (200) as the parents would normally remove a portion of the seat and the child (101) instead. Further, this type of arrangement also provides that the manual disarm (209) of
To detect that the vehicle (105) is not in operation, the embodiment of the system (200) depicted in the FIGS includes a motion sensor (221) which is used to establish if the vehicle (105) is moving or not. Specifically, in the depicted embodiment, the motion sensor comprises an accelerometer which is designed to detect the acceleration of a vehicle (105) which may be in any dimension and any number of dimensions. However, one of ordinary skill in the art would understand that other types of motion sensors could be included such as, but not limited to, remote positioning systems (such as GPS), inertial systems such as gyroscopes, infra red, capacitive or acoustic sensors, or magnetic field sensors. Still further systems designed to detect the vehicle's (105) function, but not necessarily motion, could be used such as wireless transceivers for detecting a vehicle's (105) wireless signals or a transceiver tied into the vehicle's (105) electrical system or the other sensors used to establish speed or engine function or to monitor battery voltage for fluctuations that occur during starting and or stopping the vehicle (105). Optical sensors systems could also be used to detect changes in ambient light levels or otherwise detect changes in scenery indicative of motion. Still further, acoustic or vibration sensors could be used to detect engine or vehicle (105) noise or vibration indicative of a running or moving vehicle (105).
It should be recognized that the motion sensor (221) is designed to detect particular types of motion in a preferred embodiment. Specifically, the motion sensor (221) should preferably be able to distinguish the motion of a vehicle (105) which is “in motion” from motion that is not so indicative. For purposes of this disclosure, a vehicle (105) is considered “in motion” or “in operation” when the vehicle (105) is being physically displaced through space. Thus, the vehicle (105) is being driven (in forward or reverse), is being pulled forward or backward under the effect of gravity, or is otherwise displacing along the surface of the Earth. In most cases, the “in motion” activity can be linked to a rolling motion of the tires or active use of another motive system (such as a boat propeller, a track drive, or airflow through a jet engine or propeller).
In this disclosure, the term “in motion” does not apply to a vehicle (105) which is stationary. It should be recognized that a stationary vehicle (105) can still be moving (for example, it can be vibrating due to motion in the engine, can be rocking on its springs due to movement within the cabin, or can be oscillating due to the wind blowing on it) but such a vehicle (105) is not “in motion” as defined herein because the vehicle (105) is not being physically displaced, it is only moving in place. It should also be recognized that generally the system (200) is more interested in determining if the vehicle is not “in motion” than if it is “in motion.” Thus, a default position is that if a vehicle cannot be affirmatively determined to be “in motion,” the vehicle is presumed to not be “in motion.”
An accelerometer can be a beneficial motion sensor (221) because it will trigger the alarm (211) whenever the vehicle (105) comes to a halt, or is otherwise not accelerating. Further, the accelerometer (221) is simple and robust and, while sensitive to the stopping of the vehicle (105), it will generally not trigger an alarm situation while the vehicle (105) is in motion even if the motion is erratic or very slow. Even under the command of cruise control or other computer aided piloting programs, a vehicle's (105) speed is rarely perfectly constant when it is in motion due to subtle alterations in terrain, air pressure, and other external factors, but instead there are slight fluctuations in the speed over time. These small accelerations will generally result in the alarm system (211) not being activated to indicate a left child situation (although a child having gotten out of their seat or a temperature warning may still be indicated) while the vehicle (105) is in motion. At the same time, a vehicle (105) at rest will rarely incur any acceleration indicative of being in motion and the alarm (211) is therefore reliably activated. It should also be noted that in an alternative embodiment, the motion sensor (221) and/or controller (231) can be further refined to recognize acceleration more specific to a vehicle (105) being in motion in order to eliminate noise from the signal and/or to use the motion sensor (221) as another aspect of the system (200). For example, the controller (231) may detect acceleration along a particular axis, or in accordance with a particular rate or curve. Similarly, a controller an motion sensor may be able to distinguish the motion of a boat adrift on the sea, versus a boat tied to the dock and bobbing with the waves.
In an embodiment, a vehicle (105) being in motion is detected by having the acceleration be determined along a particular axis with the accelerometer and/or controller (231) being capable of determining if a component of motion is repeatedly along that same axis. Generally when a vehicle (105) is in motion, it will be translating in a generally linear fashion. Even when turning a corner, vehicles (105) generally still have a linear aspect to their motion. In order to detect such linear motion, use of a multi-dimensional (3-axis) accelerometer as the motion sensor (221) will generally be preferred. A multi-dimensional accelerometer does not require a specific orientation relative to the vehicle (105) in order to detect the motion of the vehicle (105) and can detect that the vehicle (105) is going forward, backwards, or even sideways, in a consistent fashion. As all dimensions of motion can be evaluated, linear, forward or rolling motion (indicating a vehicle in motion) can usually be segregated from rocking, vibrational, or oscillating motion (which are not indicative of a vehicle in motion).
Use of a multi-dimensional accelerometer can also provide for noise reduction in the motion signals allowing for more subtle changes in motion to be detected. As discussed above, it is very possible that a vehicle (105) is not only in motion, but is moving due to other factors. For example a high-profile vehicle (105) (such as, but not limited to a minivan) may be being buffeted side to side by a strong cross wind while it is moving down the highway or sitting in a parking lot. In this situation, the motion “noise” caused by the wind needs to be reduced in order to detect the signal indicative of the minivan's displacement, which may be relatively small (for example if it was stuck in slow moving traffic). The buffeting of the wind, however, will generally be a different motion to that of the physical displacement of the minivan. For example, a vehicle (105) being rocked by the wind will generally move in a first direction along an axis as the wind pushes it, and then generally rock back along the same or similar axis as the wind dies down. Thus, the motion will be a “forward and back” or more rocking or oscillating motion. TO put this another way, this motion will generally be bi-directional (reverse directional) along a particular axis. A displacement motion, however, will generally be more linear or uni-directional along a particular axis to allow for physical displacement.
It should be recognized that in an alternative embodiment the motion sensor (221) need not be part of the seat (100) device but may be a part of the vehicle (105) itself. For example, the motion sensor (221) may detect that the vehicle (105) is likely “in motion” due to signals from the vehicle (105) instead of signals from an on-board sensor. In an example, the controller (231) may receive an indication of whether the vehicle (105)'s transmission is in park, a clear indicator that the vehicle (105) is not moving. Similarly, wheel rotation sensors (such as, but not limited to, those used with anti-lock braking systems) can be used to indicate that the vehicle (105) is in motion as the wheels are turning.
In a still further embodiment, motion sensors (221) can be both in the vehicle (105) and in the seat (100) and can be used to verify or counteract effects form other sensors. For example, a motion sensor (221) in the seat (100) can be used to detect the vibrational or more random motion that a child banging his feet against the seat may generate. This motion can be used to confirm a finding of the child detector (201) that the seat (100) is occupied or may be used instead of the child detector (201). Simultaneously, the controller (221) may be receiving a signal that the vehicle's (105) wheels are currently turning in a forward manner from the vehicle's (105) onboard systems and this can be used to segregate out a component of the motion at the seat (100) indicative of the seat (100) moving forward as detected by the motion sensor (221). Verification that such a linear translational component of motion exists can result in each component (221) and (201) now having a double check to determine that a child is indeed in the seat (100) and the seat (100) is in motion.
In order to provide for command and control of the system (200), the system (200) will generally include a controller (231) which is generally a processor or similar device which serves to control operation of the various components. It may, in an embodiment, include a clock circuit to delay to determine if an alarm (211) should sound based on activation by the motion detector (221), or other functions and features (such as, but not limited to, associated memory) to provide additional functionality.
The system (200) will also generally include a notification or alarm (211) in order to communicate a system status to a user. In one embodiment the alarm (211) may be audible and designed to sound after only a few seconds after a vehicle was no longer in motion. If the alarm (211) was designed to be more obtrusive, this may be undesirable. The delay chosen will, therefore, generally depend on the nature of the alarm (211) that is present or may be set by a user such as through
While the reminder system (211) is generally an audible system which is designed to produce an audible reminder that there is a child in the vehicle (105), the alarm (211) may comprise audible, tactile, visual, electronic, or any other stimulant reminder that the child is present in the vehicle (105). The reminder system (211), depending on embodiment, can comprise a subtle but specific reminder of the presence of the child all the way to a shrieking alarm system designed to attract the attention of passers-by to examine the vehicle (105) and possibly rescue a child which has been inadvertently left in the vehicle (105).
In an embodiment, the alarm (215) is a software or similar application implemented on a remote device which allows for ready portability and can provide an alarm external to the vehicle (105) without necessarily notifying passers by. This alarm is contemplated in
If an embodiment, the system (200) includes multiple different alarms, such as to provide for an escalating alarm system. In one such embodiment, the system may provide a subtle reminder for a period of time purely within the cabin of the vehicle (105) using an alarm (211) on the seat (100). If the child (101) has not been removed within this period of time, the system (200) may escalate to a longer ranged alarm such as contacting a parent's cellular phone (215) (e.g. by text, email, or voice). In the event that the child (101) has still not been removed, the system (200) may initiate an alarm designed to alert passers-by to locate the vehicle's (105) owner or determine if an unattended child is in the vehicle (105) such as an external blaring alarm or triggering the vehicle's (105) anti-theft system. Finally, a highest level alert could result in direct contact with emergency personnel (e.g., a 911 call) to investigate a possibly dangerous situation.
The alarm system (211) may be self contained and external to the vehicle's (105) electronics communicating via wire or wireless methods with the remaining components of the system (200), may be integrated with the vehicle (105)'s existing electronics (e.g. so as to allow the vehicle's (105) horn to sound upon an alarm condition), or may interface with other objects the parent may have, such as a cellular phone, pager, or other wireless device that they are likely to have with them.
The system (200) could communicate via wireless communication and or hard wire to the alarm (211) based on the design and the type of alarm system (211) that is to be activated. In the depicted embodiment of
In the case of a more subtle alarm, there is generally little to no delay on the motion sensing system (221) detecting that the vehicle is not in motion and triggering the alarm (211) as soon as no vehicle (105) acceleration is detected. In the depiction of
The Alarm (211) will also sound when the vehicle (105) is parked serving as another reminder to remove the child (101). Once the notification has sounded, the system (200) may enter a wait mode where it will not notify for a longer period of time. If no movement has been detected, the alarm (211) may be sounded again. In this way the system does not become annoying if the vehicle (105) is stopped at a stoplight, while still making sure that notification is given.
In the alternative embodiment of
In an embodiment, the system (200) as shown in
It is preferred that a device (215) such as a mobile phone be used to provide the alarm (211), as such a device is commonly already carried and used by a parent and is fairly specific to them. Further, in today's constant communication society many parents are very attuned to responding to alerts from their smartphone (in the form of incoming calls, emails, texts, or other data) regardless of source or importance. Thus, the parent is likely to carry the device with them at all times, and to be responsive to alerts it provides. A custom notification system (215) may be provided in an alternative embodiment, but that is generally not preferred as it is more likely a parent would forget to carry it.
In
In most vehicles (105) today there is already a wireless receiver/transceiver (301) typically for picking up the Key FOB signals and Tire Pressure Monitoring signals. It is becoming more common to see Bluetooth, RFID, and WIFI transceivers in vehicles (105) to communicate with external devices etc. Further, vehicles (105) may include installed wireless devices such as third party GPS receivers. For a vehicle (105) to communicate with external devices would generally only require a software change which is very inexpensive as compared to adding a dedicated receiver or transceiver. A hard wired vehicle (105) seat-monitoring device is generally expensive, adds complexity, and warranty to all cars and even when the purchaser or user of the vehicle (105) may not have children or a need for this sort of device they still have to pay for it. An advantage is that an after-market or car seat installed device can be sold separately in the dealership or into standard retail and after-market channels and used only if needed.
Field strength of the wireless signal between the two devices (specifically the car seat device (200) and alarm receiver (215)) can be used to determine if the distance between the two is increasing or not. Such an increase is a sign that the caregiver is potentially forgetting the child in their vehicle seat (100) as they are moving away from the vehicle (105) while the child (101) has been determined to still be in the vehicle (105). Acceleration measured internally on the receiving device (215) (such as the internal position sensing systems) can also be compared to the 3 axes of acceleration measured on the vehicle seat (100) mounted monitor (2000) and can be used to determine relative movement between the vehicle (105) seat and caregivers receiving device (215) over a period of time. If both are in the vehicle (105) together and the vehicle (105) is in motion the acceleration profiles should be similar. A case where the child (101) is in the seat (100) and the vehicle (105) is parked will have little or no acceleration changes detected and if the caregivers phone detects measurable changes in acceleration over the same period time, this is an indication that the care giver could be moving away from the vehicle (105) without the child (101). This signal is meant to be a redundant check, to aide in eliminating false alarms and improving accurate alarm response but can be used as such.
Similarly to the device of
In the case of it being a smartphone application, the phone (215) will preferably display an alert screen and audible or vibratory signal to alert the caregiver. In addition, the phone or device (215) can also send a message to a third party via the cellular network (for example a Text Message, IM, or E-Mail. This message could contain any combination of the following data, Child in seat, Child out of seat, vehicle Moving, Velocity, GPS location, altitude, temperature in vehicle seat and so on.
While not depicted in the FIGS, in the event that a predetermined number of alarms have sounded indicative that the child (101) may not have been moved (for example 300 seconds has elapsed since the initial alarm) and the parent may no longer be present, the control (231) may escalate the alarm. In an embodiment, this comprises activating a wireless transmitter that contacts a parent's cell phone or a device such as a Bluetooth™ receiver provided with the system and which the parent is supposed to have with them at all times. The system (200) may then wait for a response. If the parent knows this to be a false alarm, they may indicate on their wireless device resetting or disarming the system (200). If the system (200) does not receive a response from the parent, the system (200) may escalate further and possibly sound an external alarm on the vehicle (105) trying to attract the attention of passers-by to get them to break into the vehicle (105) and rescue the child (101), utilize a contact system such as OnStar™, or initiate other actions.
It should be noted that one advantage of using an accelerometer (221) sensitive to vehicle (105) motion to reset a system (200) with an escalating or other external alarm is that it allows a vehicle (105) occupant to easily reset a false alarm. For example, should the parent be stuck in traffic and the alarm be escalating or sounding, they can easily reset the timers by simply allowing the vehicle (105) to roll forward a short distance, which motion is detected and the system and results in a reset. Further, even in heavy traffic it is unlikely that the vehicle (105) will not be moving at all naturally inhibiting alarm escalation.
In both cases, the alert includes an “ignore” button (1201) which allows the parent to silence the alert if they know it to be a false alarm. For example, if the child is in the seat (100) and the vehicle (105) has stopped, but the parent has not yet removed the child, but knows they are there. The ignore button (1201) will generally not disarm the system (200), but will simply serve to quiet the alarm for a certain period of time. If the alarm situation is detected after that time has elapsed, the alarm will generally be triggered again.
It is important to recognize that this phone application can be running all the time and when the child (101) is placed in the seat with the monitor (2000), the two may automatically recognize one another forming the complete system (200). The phone application can also be configured to automatically start when the phone is turned on. The phone (215) can initiate the connection or the vehicle seat monitor (2000) can initiate the connection. Thus,
In the flow diagram of
When the monitor (2000) is communicating with vehicle (105) electronics (301) to indicate whether a child is present or not and using this to forward signals to a remote device (215), it is generally not the case that a disconnection will not need to occur unless the vehicle (105) is physically turned completely off. Further, such forwarding of communication can also allow the vehicle (105) to make proper adjustments to the air bag modules or its own operation by knowing there is a child in the seat (100). This could allow for parents to place children in any seat (100) without the need to manually turn airbags on or off or adjust them. This later option is becoming increasing important as airbags become more pervasive in the rear of vehicles. The device can also utilize multiple forms of communication in the event that an alarm situation exists (or is possible) and the alarm receiver (215) is moving out of range. This could, in fact, trigger an alarm condition in an embodiment.
By communicating with the vehicle (105), popular systems like the GM OnStar™ system, Ford Sync™ System, and Mercedes Benz safety system (200), would allow for more advanced decisions between the monitor (2000) and the rest of the system (200) enhancing the safety of its occupants and reducing injuries and fatalities, such as, but not limited to, monitoring the vehicle's (105) status, rolling windows down, unlocking doors, contacting caregivers directly, or calling 911. Interaction with onboard vehicle (105) control systems can provide for improved options of response. For example, in an embodiment, if the system (200) detects a likely child (101) in car seat (100) scenario and an indication that there is a rising internal temperature, the vehicle (105) could be remotely started and windows could be lowered or the air conditioning system activated to quickly lower the temperature. Similarly, in the event of a potential danger scenario a remote monitoring service could activate onboard cameras or microphones inside the cabin of the vehicle (105) to review the inside of the vehicle (105) and see or hear if a child (101) is present.
While the above has been discussed the operation of singular devices, multiple devices (2000) and monitors (215) can be communicating on a network or independently. Thus, both mom and dad's phone can be interacting with a single vehicle seat monitor (2000) or with multiple monitors (2000). Depending on embodiment, these independent communications may utilize the same protocols, different protocols, and the same or different networks. Mom's and dad's phones can both be in communication with the vehicle (105), or controller (231), and either can make a decision if a left child or other warning is received. Similarly multiple vehicle seats in multiple cars can also interact with each other.
The monitor (2000) can automatically pair itself to the caregivers' phone(s), PC home computer, and/or house-monitoring system (215) or home alarm (215) when in proximity to the monitor (2000). Monitor (2000) can connect to these objects though the Internet via the caregivers phone application, giving the status of the child (101), vehicle seat (100), and vehicle (105) conditions. It can also utilize information stored on the alarm receiver (215) such as address books and related information to attempt to make contact with another person if there is a decision by the controller (231) that the alert may not being received. Should an alarm continuously sound for a sufficient length of time, the system may check to see the geographical proximity between the alarm receiver (215) and the car seat monitor (2000). If this is within a few meters, the system may determine that the parent not only forgot the child, but also forgot their phone (215). It may then utilize an emergency contact routine to send an alert to a different device (e.g. a different phone (215) associated with the parents) and can even send a message to emergency personnel. For example, the system could contact an OnStar™ or other service operator to have to perform additional monitoring of the vehicle (105) (such as accessing an onboard camera or microphone) or could send a message to emergency 911 operators including the potential situation and the global positioning coordinates of the vehicle (105) to allow them to send assistance.
So as to illustrate alternative operations of the system, three different exemplary operations will now be described.
In the first system the system (200) is designed to utilize two motion detectors (221) in conjunction with each other. The first motion detector (an accelerometer in this embodiment) determines if the vehicle (105) is not in operation and if so arms the system, the second motion detector (201) is used to determine if there is motion within the vehicle (105) (indicating the presence of an unattended child (101)) and trigger the notification (211).
In an operation of the system (200) in this example, an embodiment of an accelerometer (221) may work as follows. If the accelerometer (221) output changes by more than 0.1 g or 60 millivolts in any 200 millisecond period and outputs acceleration in the same direction for each of the 67 millisecond periods during this 200 millisecond period, it can be determined that the vehicle (105) is moving. A determination of movement results in a timer in the control (which may be on the order of 120 seconds) is reset to zero seconds. If the timer reaches 120 seconds and the vehicle (105) is determined to not be moving at that time (and/or has not moved during that time) the second motion sensor (201) is activated and monitored. At this point it is assumed that the vehicle (105) is probably no longer in operation so the system needs to determine if a child (101) is present in the vehicle (105). This embodiment therefore does not arm the system (200) from the child's (101) presence, but instead arms the system (200) from the vehicle (105) being determined to not be in operation.
The logic over the 200-millisecond period on the accelerometer (211) can be to differentiate between a child (101) moving in a seat (100) which may provide some acceleration to the seat (100), which may be picked up by the accelerometer (221), and the vehicle (105) being in motion, which is also picked up by the accelerometer (221).
Movements by a child (101) (or other human interacting with the car seat) generally generate short acceleration spikes typically less than 67 milliseconds in duration. These spikes randomly accelerate and decelerate within the 67-millisecond period. In effect, the acceleration is “jerky.” A vehicle (105) that is moving, on the other hand, typically exhibits a gradual increase in acceleration (in the same direction with little or no deceleration present) for periods longer than 200 milliseconds. The control system in this embodiment, is constantly looking for these cases to establish if the car is sitting still and is disregarding other possible acceleration such as a child (101) moving in the seat (100) or the seat (100) being moved by something other than vehicle (105) motion. It should be understood that through filtering in software or hardware the controller (231) could filter out the child (101) moving and the same motion detector (221) may be used for both purposes in some embodiments. For example, the controller (231) may smooth or integrate the accelerometer's return to attempt to eliminate such spikes.
The choice of delay in this case is to allow time to turn the vehicle (105) off and remove the keys, gather belongings, remove the child, and exit the vehicle (105) (which has been found to be approximately 120 seconds). In the currently discussed embodiment, if no vehicle (105) motion that is consistent with a properly started, running, or rolling (in motion) vehicle (105) is detected from the accelerometer (221) for 120 seconds a second motion detector is enabled to detect the presence of a child (101) in the vehicle (105). When the control (231), which in this case is a microprocessor, senses a change in the output of this second motion sensor, it enables and starts another 120-second timer that counts the number of changes that occur in the next 120 seconds. If the microprocessor (231) senses a preselected number of changes during this window or if the initial pulse is continuously low for the period, the control determines that an unattended child (101) situation may exist and an alarm signal is transmitted to the alarm system (211), sounding an alarm.
If a child (101) were left in an unattended vehicle (105) that does not have the ignition on, the alarm would therefore generally activate 240 seconds after the vehicle (105) was parked. If a child (101) entered an unattended vehicle (105) and was detected by the motion sensor (221) or the car seat detector (201) without having the ignition on, the vehicle (105)'s alarm (211) would sound within around 120 seconds. If the vehicle (105) is sitting still (parked) while the engine is running the alarm (211) will still enable itself after 120 seconds and after an additional 120 seconds with child (101) continuously present in the vehicle (105), it will also trigger the alarm (211).
In a second exemplary embodiment, the device of
Further in this embodiment, when the child moves off of the sensor (201), the control system (231) will also detect that the system (200) is to disarm and will also trigger a notification (211) to identify that the system (200) is disarming. In this embodiment, the notification (211) plays a series of beeps or chirps to indicate that the system (200) is disarming. If the parent has purposefully removed the child (101) from the seat (100), this notifies them that the system (200) has disarmed and will not annoy them. If the child (101) is expected to still be in the seat this provides an immediate warning to the parent that they may need to stop the vehicle (105) and check on the child (101).
In a still further example a more integrated system is contemplated. In this embodiment, the device is integrated as part of the child seat (100). Once the child seat (100) is installed, the controller (231) detects (such as via position sensors or connections) that the seat is in a vehicle (105). When the vehicle (105) is started, the seat automatically identifies itself to the vehicle (105) whose onboard electronics are designed to recognize its presence. Upon detecting the seat, the vehicle (105) may activate a dashboard display to indicate that a child car seat (100) is present in the vehicle (105). The controller (231) may also identify the location of the seat (100) to the vehicle (105) and the vehicle (105) may automatically adjust onboard controls to compensate. For example, if the car seat (100) is installed on the right side of back seat of the vehicle (105), the vehicle (105) may use onboard sensors to detect its weight, disable a right side rear airbag, turn on child safety locks and disable window controls on the right side of the rear of the vehicle (105), and increase the tension on the right side seatbelt which is indicated to be connected and therefore potentially being used to secure the seat (100).
If the controller (231) indicates there is a child (101) in the seat (101), the vehicle (105) may also provide a dashboard indicator light or other onboard control to indicate to the parent that the seat is occupied. After connecting with the vehicle (105), the seat may then attempt to seek out any enabled devices in the vicinity and pair with them. It may then locate mom's cell phone in her purse, as well as a GPS positioning system located on the vehicle's (105) windshield. These systems may then be engaged in a monitoring mode with software activated to receive signals from the controller (231). As multiple alarm systems (211) are present (the vehicle (105) itself, mom's phone, and the GPS system), an order of preference may be determined by the controller (231) of alarm. In this example, the GPS system will have preference to provide the first notice (as it is non-intrusive and likely will be detected by a parent in the vehicle (105)) with the phone having the second level of escalation but if the phone begins to move away form the seat (100) the phone will become the first level of escalation. The third level of escalation may be calling Dad's phone (which is determined to not be in the car since it has not been paired with) and a fourth level of calling 911 utilizing on-board vehicle electronics or a WIFI enabled system on board the monitor (2000).
As can be seen in this embodiment, the system effectively automatically configures the vehicle (105) to adapt to the presence of the seat (100), and configures the seat (100) to go through a preferred order of alarm and notification based on the systems present that the monitor (2000) can utilize as part of the system (200). To a parent, this setup can be performed transparently or near transparently without their needing to take any action. The simple placement of the child in the seat serves to activate the cascade of events, fully arm and prepare the system (200), and provide the determined level of protection.
LOW_POWER state is a state where the car seat monitor is consuming the least amount of power. When a child is detected to be in the car seat, the state will transition to the CONNECTING state.
CONNECTING state is a state where the car seat monitor (2000) is attempting to establish a connection to the smartphone (215). If a connection attempt is successful, the state will transition to the CONNECTED_CAR_NOT_MOVING state. However, if the timeout timer expires before successfully establishing a connection, the state will return to LOW_POWER state.
CONNECTED_CAR_NOT_MOVING state is a state where a child (101) is detected to be in the car seat (100) and where the vehicle (105) is determined to be not in motion. When the vehicle (105) is determined to be in motion, the state will transition to the CONNECTED_CAR_MOVING state. When the child (101) has been detected to be not in the car seat (100), the state will transition to the CONNECTED_CHECK_TIMEOUT state. If the connection is disconnected, the state will transition to the LOW_POWER state.
CONNECTED_CHECK_TIMEOUT state is a state where the vehicle (105) is not moving and the child (101) that was previously in the car seat (100) has been taken out of the car seat (100). It is also in this state where a timeout timer has been started. When the timeout timer has expired, the car seat (100) will disconnect from the smart phone determining the situation is safe. When the car seat (100) has successfully disconnected from the smartphone (215), the state will transition to the LOW_POWER state. If a child has been placed in the seat before the timeout timer has expired, the state will transition to the CONNECTED_CAR_NOT_MOVING state.
CONNECTED_CAR_MOVING state is a state where a child (101) is detected to be in the car seat (100) and where the vehicle (105) is determined to be in motion. When the vehicle (105) is determined to be not in motion, the state will transition to the CONNECTED_CAR_NOT_MOVING state; while when the child (101) has been detected to be not in the car seat (100), the state will transition to the CONNECTED_BAILOUT state. If the connection is disconnected, the state will transition to the LOW_POWER state. It is also in this state where a timeout timer has been started. When the timeout timer has expired, the car seat will transition to the CONNECTED_BLUETOOTH_OFF state.
CONNECTED_BLUETOOTH_OFF state is a state where the connection is temporarily disconnected to conserve power during long durations of vehicle (105) movement by disabling the more power hungry communication components of the device (200). When the child (101) is detected to be not in the car seat (100) or the vehicle (105) has been detected to be not in motion, the state will transition to the RECONNECTING state. If a connection has been established by the smartphone (215), the state will transition to the JUST_CHECKING state.
CONNECTED_BAILOUT state is a state where the child (101) has been detected to be not in the car seat while the vehicle (105) is in motion (but was previously). When the child (101) is detected to be in the car seat (100), the state will transition to the CONNECTED_CAR_MOVING state. When the vehicle (105) has been detected to be not in motion, the state will transition to the CONNECTED_CHECK_TIMEOUT state.
JUST_CHECKING state is a state that indicates to the smartphone (215) that the car seat is still within range but where additional communication is generally unnecessary. The state will transition to the CONNECTED_BLUETOOTH_OFF state.
RECONNECTING state is a state where the car seat monitor (2000) is attempting to establish a connection to the smartphone (215) after temporarily disconnecting the connection due to a long duration of vehicle (105) movement. It is also in this state where a timeout timer has been started. If a connection attempt is successful and the child (101) is detected to be not in the car seat (100), the state will transition to the CONNECTED_BAILOUT state. If a connection attempt is successful and the vehicle (105) is determined to be not in motion, the state will transition to the CONNECTED_CAR_NOT_MOVING state. However, if the timeout timer expires before successfully establishing a connection, the state will return to RECONNECTING state.
While the above embodiments contemplate the use of the device in private vehicles (105), in alternative embodiments, the device can also be used on public vehicles (105). For example, school busses and day care vehicles (105) with multiple kids that could be left behind if driver does not check all seats at the end of a work day or trip. A system (200) can be installed in that vehicle (200) to detect the presence of children in the seats to make sure that a child that may be asleep on the seat is not left when the bus is parked. A similar system could also be installed on an airplane.
While the above has discussed a number of embodiments and general indications of how the system (200) can operate, there are discussed below are a number of examples of specific logic flows that can be used to determine if a danger situation exists on a circuit such as those provided in
If the motion sensor (221), an accelerometer for this case, output changes by more than 0.1 g or 60 millivolts in any 200 millisecond period and outputs acceleration in the same direction for each of the 67 millisecond periods During this 200 millisecond period. It can be determined that the vehicle (105) is moving
If these two conditions are met we assume the vehicle (105) is moving and Timer 1 (120 second timer) is reset to zero seconds. If timer 1 reaches 120 seconds the vehicle (105) is determined not to be moving, and the motion Sensor and vehicle (105) seat sensor are activated and monitored. At this point it is assumed that the vehicle (105) is still and possibly turned off with a child unattended in the vehicle (105).
The software that monitors the accelerometer output is constantly looking for these cases to establish if the vehicle (105) is sitting still, a child is moving in the seat or if a child is moving in the seat while the vehicle (105) is moving. It should be noted that if a child is moving in the seat while the vehicle (105) is moving, the controller (231) will generally make the conservative (safer) decision that the vehicle (105) is not moving and enable itself. In this case the controller (231) will detect accelerations and decelerations of the child moving in addition to the vehicle (105) decelerating or accelerating.
This case is the summation of two cases: Case 1 is the Detection of the higher frequency movement caused by the movement of the child in the seat. Case 2 is the constant Acceleration or deceleration of the vehicle (105). It should be understood that through filtering in software or hardware one could filter out the child moving.
If no vehicle (105) motion that is consistent with a properly started, running or rolling vehicle (105) is detected from the vehicle (105) motion sensors (1) for 120 seconds the Motion detector (2) is enabled to detect the presence of an intruder or child in the vehicle (105)
When the Microprocessor senses a change in the output of Motion sensor 2, it enables and starts another 120-second timer that counts the number of Motion detector 2 changes that occur in the next 120 seconds. If the microprocessor senses 2 (2 being an arbitrary number to avoid false alarms) or more changes within this 120-second timer window or if the initial pulse is continuously low for 120 seconds an alarm signal is transmitted to activate any combination of systems or devices mentioned in section 1, If one (one being an arbitrary number) pulse less than 120 seconds in duration is detected nothing happens.
If the child detector circuit (201) detects the presence of a child (101) its output state changes. When the controller (231) senses this change it starts a 120 second timer that counts the number of changes that occur within 120 seconds. If the controller (231) senses more than two changes within this 120-second timer window or if the change of state is continuous for 120 seconds an alarm signal is transmitted to any combination of the systems and devices mentioned in section 1
120 seconds was chosen to allow time to Open the vehicle (105) door, secure the child and any belongings into the vehicle (105) (Approximately 100 seconds) Close doors and Start vehicle (105) Approximately 20 seconds. 120 seconds was chosen to allow additional time on top of the 120 seconds to remove the child from the vehicle (105) seat.
If a child were left in an unattended vehicle (105) that does not have the ignition on, the alarm would activate 240 seconds after the vehicle (105) was parked.
If a child entered an unattended vehicle (105) and was detected by the motion sensor or the vehicle (105) seat detector without having the ignition on, the vehicle (105)s alarm would sound within 120 seconds.
If the vehicle (105) is sitting still (parked) while the engine is running the alarm will still enable itself after 120 seconds and after an additional 120 seconds with child continuously present in the vehicle (105), it will start transmitting signals to any combination of the systems and devices mentioned in section 1. As long as the vehicle (105) is running the actual vehicle (105) panic alarm will not sound. The cars electronics prevent the panic alarm from sounding via Key Fob panic signal when the key is the accessory position or the vehicle (105) is running.
However it needs to be understood in this case, if you turn the vehicle (105) off anywhere in this first 120 second window after the vehicle (105) is parked, you will have somewhere between 0 and 240 seconds to remove the child from the vehicle (105) before the alarm is sounded. This is because for this example the alarm system is enabled 120 seconds after the vehicle (105) stops moving, not 120 seconds after the ignition is turned off.
In the case of the alarm sounding it can simply be deactivated by pressing the driver's key chain panic button or starting the vehicle (105). In this case the Vehicle (105) seat safety systems is still enabled and is fully functional and will sound the alarm within 120 seconds if a child is detected inside the vehicle (105).
It is understood that variations in logic and filtering for enabling the sensors and activating the alarm could be applied to effectively detect the presence of a child in the vehicle (105) or vehicle (105) seat. For example all of the sensors could be continuously powered and monitored or the system could also be configured to detect when the engine is turned off versus when the vehicle (105) stops moving.
While the invention has been disclosed in connection with certain preferred embodiments, this should not be taken as a limitation to all of the provided details. Modifications and variations of the described embodiments may be made without departing from the spirit and scope of the invention, and other embodiments should be understood to be encompassed in the present disclosure as would be understood by those of ordinary skill in the art.
This application is a Continuation-in-Part (CIP) of U.S. Utility patent application Ser. No. 12/335,421 filed Dec. 15, 2008 and currently pending which claims the benefit of U.S. Provisional Application Ser. No. 61/013,929 filed Dec. 14, 2007. This Application also claims the benefit of U.S. Provisional Application Ser. No. 61/441,199 filed Feb. 9, 2011, U.S. Provisional Application Ser. No. 61/504,113 filed Jul. 1, 2011, and U.S. Provisional Application Ser. No. 61/538,647 filed Sep. 23, 2011. The entire disclosure of all the above documents is herein incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61013929 | Dec 2007 | US | |
| 61538647 | Sep 2011 | US | |
| 61441199 | Feb 2011 | US | |
| 61504113 | Jul 2011 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12335421 | Dec 2008 | US |
| Child | 13370021 | US |
