Patent Grant
9970228
The present invention relates generally to moveable barrier operators, and more specifically to safety sensors for movable barrier operators.
Various access control mechanisms are known, including, but not limited to, single and segmented garage doors, pivoting and sliding doors and cross-arms, rolling shutters, and the like. In general, an operator system for controlling such movable barriers includes a primary barrier control mechanism coupled to a corresponding barrier and configured to cause the barrier to move (typically between closed and opened positions).
Some movable barrier operator systems are equipped with safety sensors for detecting obstructions in the path of the movable barrier's movement. Safety sensors generally function to prevent a moving gate from striking an object or a person and causing damage. Typically, when an obstruction is sensed, the operator would disallow the operation of the barrier. However, safety sensors are subject to misalignment and other operation failures. For example, when optical sensors, such as a photo-eye sensor, become misaligned, the sensors would indicate an obstruction to the operator when no obstruction is actually present. Detection of a false obstruction is common because many safety sensors in the interface electronics are designed to be failsafe. That is, a failure in the link of the sensor is detected by system to be the equivalent of an obstruction, and the operator responses to the failure of a sensor in a similar manner as an obstruction. When failure occurs, users are then prevented from gaining entrance through a movable barrier even though the barrier is safe to operate. Safety sensor failure is especially a problem for residential gates and garage doors in which the movable barrier may be the primary means of entrance into the residential premise.
Methods and apparatuses for controlling a movable barrier operator while overriding a safety system are described herein. One example method includes determining whether the safety system of the movable barrier control system is in an operation failure or misalignment state. The movable barrier operator may enable one or more override methods to allow for the movement of the barrier despite the state of the safety sensors. For example, the system may detect the proximity of a portable transmitter or a human operator to enable the safety system override. In another example, the system may activate a warning system before and/or during the movement of the movable barrier to warn any persons who may be in the barrier's path of movement. In yet another example, the user may manually override the safety system by pressing a combination of buttons on a portable transmitter and override the safety system without having to gain access into the premises behind the barrier.
This system has several advantages over a conventional system. In a conventional system, there is either no safety override mechanism or the user must first gain access to a stationary control panel to perform the override. Residential gates, for example, have a stationary control panel often situated inside the gate. If no pedestrian entrance is accessible, the user has to climb over the gate to access the controls to override the safety system. This is particularly inconvenient and dangerous when there is not enough driveway space to park a vehicle without obstructing street traffic. With the system disclosed herein, the user is able to override the safety system and operate the movable barrier while being outside of the gate, and, in many cases, from within his/her vehicle. These and other benefits may be clearer upon making a thorough review and study of following detailed description.
Corresponding reference characters indicate corresponding components throughout the several views of the drawings. Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of various embodiments of the present invention. Also, common but well-understood elements that are useful or necessary in a commercially feasible embodiment are often not depicted to facilitate a less obstructed view of these various embodiments. It will be further be appreciated that certain actions and/or steps may be described or depicted in a particular order of occurrence while those skilled in the art will understand that such specificity with respect to sequence is not actually required. It will also be understood that the terms and expressions used herein have the ordinary technical meaning as is accorded to such terms and expressions by persons skilled in the technical field as set forth above except where different specific meanings have otherwise been set forth herein.
The following description is not to be taken in a limiting sense, but is made merely for the purpose of describing the general principles of exemplary embodiments. The scope of the invention should be determined with reference to the claims. Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.
Furthermore, the described features, structures, or characteristics of the invention may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided, to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
Referring now to the drawings and especially to
The garage door 24 has a conductive member 125 attached. The conductive member 125 may be a wire, rod or the like. The conductive member 125 is enclosed and held by a holder 126. The conductive member 125 is coupled to a sensor circuit 127. The sensor circuit 127 transmits indications of obstructions to the head unit 12. If an obstruction is detected, the head unit 12 can reverse direction of the travel of the garage door 24. The conductive member 125 may be part of a safety system also including the optical emitter 42 and the optical detector 46.
The head unit 12 has the wall control panel 43 connected to it via a wire or line 43A. The wall control panel 43 includes a decoder, which decodes closures of a lock switch 80, a learn switch 82 and a command switch 84 in the wall circuit. The wall control panel 43 also includes a light emitting diode 86 connected by a resistor to the line 43A and to ground to indicate that the wall control panel 43 is energized by the head unit 12. Switch closures are decoded by the decoder, which sends signals along line 43A to a control unit 200 coupled via control lines to an electric motor positioned within the head unit 12. In other embodiments, analog signals may be exchanged between wall control panel 43 and head unit 12.
The wall control panel 43 is placed in a position such that an operator can observe the garage door 24. In this respect, the wall control panel 43 may be in a fixed position. However, it may also be moveable as well. The wall control panel 43 may also use a wirelessly coupled connection to the head unit 12 instead of the line 43A. If an obstruction is detected, the direction of travel of the garage door 24 may be reversed by the control unit 200.
Next referring to
The systems shown in
Next referring to
In step 304, the system determines whether the safety system indicates an obstruction. The system reads an output form the safety system to determine whether the safety system indicates an obstruction. In some embodiments, the system is designed to be failsafe, such that when the operator does not receive a signal from one or more sensors of the safety system, the presence of an obstruction is assumed by the system. In some embodiments, the safety system may include multiple safety sensors and/or multiple pairs of safety sensors. The system will determine that there is an obstruction if at least one of the sensors in the safety system indicates an obstruction. In some embodiments, prior to step 304, the operator first determines a direction of movement in response to state change request, and only considers the sensors associated with the determined direction of movement in step 304.
In step 306, the movable barrier operator determines whether the safety system is in an operation failure or misalignment state. The safety system may be in a failure state if the connection between the safety system and the movable barrier operator is interrupted, unstable, or disconnected. In safety systems that are designed to be “failsafe,” the system interprets a failure in the link between the safety system and the operator as obstruction. The safety system may be in a misalignment state if the sensors are mechanically misaligned. In some embodiments, the safety system includes one or more pairs of optical transmitter and receiver which are configured to detect obstructions when the optical link between the transmitter and the receiver is interrupted. However, when the sensors are mechanically misaligned, the optical link would also remain broken in the absence of an obstruction and would cause the safety system to indicate an obstruction to the operator even when no actual obstruction is present.
In some embodiments, the system is able to differentiate between a connection failure and a legitimate obstruction detected signal received from the safety system. For example, the system may read the voltage level of the safety system or sensor output to determine if the system and/or the sensor is still powered and/or connected. In some embodiments, the operator determines that the safety system is in an operation failure or misalignment state based on the duration of the indication of the obstruction. For example, the operator may run a timer when an indication of an obstruction is received from the safety system. If an obstruction is consistently indicated for a prescribed period of time, (for example, over five minutes, ten minutes, thirty minutes, etc.) the operator may determine that the safety system is in an operation failure or misalignment state. In some embodiments, the safety operator constantly or periodically monitors for failure or misalignment state and stores the safety system state information on a memory device prior to receiving a state change request in step 302. In 306, the operator may simply read the safety system state information stored on a memory device of the operator to determine whether the safety system is in an operation failure or misalignment state. In some embodiments, the safety system may include two or more sensors or pairs of sensors, and the states of each sensor or pair of sensors may be determined and stored individually. For example, a gate may be equipped with a close edge sensor and an open edge sensor, and the operator may separately determine whether one or both of the close edge sensor and the open edge sensor are in an operation failure or misalignment state. In some embodiments, steps 304 and 306 are only based on the sensors associated with the direction of requested movement of the movable barrier. For example, if the state change request is made to open the gate, only the obstruction indications from open edge sensors are considered in step 304 and only the states of the open edge sensors are considered in step 306. That is, if a request to open the gate is received while one or more of the close edge sensors are in an operation failure state, the open operation may still proceed directly to step 314 and actuate the barrier.
In some embodiments, if the system already determines that the safety system is in an operation failure or misalignment state, the system may skip over step 304 and ignore the output of the safety system when a state change request is received.
If the operator determines that the safety system is not in an operation failure or misalignment state in step 306, the process proceeds to step 310 and the movable barrier is not actuated. That is, if an obstruction is indicated by the safety system and the safety system is not in an operation failure or misalignment state, the operator assumes that the obstruction indication is based on actual obstruction and prevents the movable barrier from moving.
If the operator determines that the safety system is in an operation failure or misalignment state in step 306, the process proceeds to step 308 and the operator determines whether a safety override condition exists. Safety override condition may be one or more of several conditions. In some embodiments, the system determines the proximity of a portable transmitter utilized by a human operator and only allow for safety system override when the portable transmitter is within a prescribed distance from the movable barrier. Typically, the portable transmitter is the device used by the user to send the state change request, which may be a portable, handheld RF device, a vehicle installed or mounted device, a vehicle-based telematics system, a mobile device (mobile phone, smart phone, tablet, and the like) having programming allowing control of the movable barrier operator, or the like. The proximity of the portable transmitter and/or a human operator may be determined using one or more of a radio-frequency identification (RFID) sensor, a magnetic field sensor (such as a rod antenna), a toll pass sensor, an ultrasonic distance sensor, a passive infrared (PIR) sensor, an acoustic notch filter (such as an acoustic sensor), a microphone, a camera, a reflective optical sensor, a tasker light sensor, a weight pressure sensor, an air pressure sensor, a network adapter receiving a GPS coordinate of the portable transmitter, or measuring a signal strength of the portable transmitter's signal, which may include the state change request, and determining whether the signal strength is greater than a threshold value. Other ways of detecting the human operator's physical presence within the prescribed distance from the barrier are possible. In some embodiments, the presence of a human operator is detected via detecting a human operated vehicle in which the portable transmitter may be mounted or installed. The vehicle could be detected using any suitable detection means including any one or more of a loop detector, a toll-pass sensor, a distance sensor, an infrared sensor, a microphone, a camera, an optical sensor, a pressure sensor, or the like. In some embodiments, the human operator's location and proximity may be determined through the GPS information of a networked user device associated with the user such as a cell phone, smart phone, mobile computer, tablet computer, vehicle telematics system, or the like. When the proximity of the portable transmitter and/or human operator is detected, the human operator can be relied upon to manually monitor for obstructions. As such, the system may allow for the operation of the barrier despite the state of the safety system under these conditions.
As mentioned above, the system optionally activates a warning system to warn individuals in the area of the barrier of its movement. The warning system may include one or more of a flashing light and audible alarm near the barrier. In some embodiments, the warning system may also include light or sound alarms at the portable transmitter.
In addition to or alternatively to determining proximity of the user, the override condition may be triggered by receiving a user initiated input. For example, the user may flash a vehicle headlight or sound a car horn to enable the safety override. In such embodiments, the movable barrier operator systems may be equipped with suitable sensors such as a microphone, light detector, camera, and the like to detect such inputs. In another example, the user may use a portable transmitter to enable override. For instance, the user may hold down two or more buttons on the transmitter or press two or more buttons on the transmitter in a select pattern to enable safety system override. In still another example, the user may enter a safety override pass code to enable the safety override. The code may be entered through the portable transmitter, a control panel situated on the outside of the movable barrier such as the external control pad 34 shown in
The safety override condition may comprise a combination of two or more of the above conditions. For example, the safety override condition may require that the portable transmitter be in proximity of the barrier, and the alarm be activated to enable safety override. In another example, the safety override condition may require that the user to hold down two or more buttons on the portable transmitter for an extended period of time and that the received signal strength is greater than a prescribed threshold to override the safety system.
In one approach, the system may provide an indication to the user if an obstruction, failure, and/or misalignment are detected in steps 304 and 306 to prompt the user to perform the action(s) needed to meet the safety override condition. For example, if the state of the safety system is preventing the barrier from being actuated in response to a state change request, the system may produce a sound or flashing light to notify the human operator. The override instructions may be provided in a variety of ways such as in writing or transmitted electronically to the portable transmitter. In another approach, a short range radio signal may be broadcasted such that the user can tune to the corresponding radio station on his/her car radio to receive instructions on how to override the safety system. Information regarding the radio station may be provided in writing or transmitted to the portable transmitter. For example, the transmitter may include the text: “for safety override instructions, tune to FM 106.7,” and the radio station may repeat “if you wish to override the safety system of our garage door, please press and hold the number 1 and 2 keys down for five seconds.” Optionally, when the safety override condition is determined to exist in 308, the system may produce a sound or light notification to the user via either the barrier system or the portable transmitter to notify the user that the override is successful. For example, after the user holds down two or more keys on the portable transmitter for the prescribed period of time, the portable transmitter may beep to notify the user that the safety system has been successfully overridden.
If the barrier operator determines that the safety override condition has not been met in step 308, the process proceeds to step 310, and the movable barrier is not actuated. If the operator determines that the safety override condition has been met in step 308, the process proceeds to step 312, and an override of the safety system is performed. In some embodiments, if the safety system includes a plurality of sensors or sensor pairs, the operator may only override the sensor(s) that have been determined to be in an operation failure or misalignment state. For example, if a movable barrier has sensors at two heights and the lower sensor has been determined to be in an operation failure or misalignment state, the operator may still prevent the movable barrier from being actuated based on the readout of the functional sensor(s).
In step 314, the movable barrier is actuated by the operator. In some embodiments, if the safety system includes a plurality of sensors or sensor pairs, step 312 may only override the sensor(s) that have been determined to be in an operation failure or misalignment state during the movement of the movable barrier. For example, if a functional sensor indicates an obstruction during the movement of the movable barrier, the operator may still stop or reverse the direction of the movement of the movable barrier.
In some approaches, the system may require the user to send another state change request prior to actuating the movable barrier in step 314. For example, a user may enter a pass code on their networked mobile device to override the safety system and then has to press the portable transmitter to send a state change request to actuate the movable barrier. In some embodiments, the safety system is overridden only for a prescribed period of time (for example, 1 minute, 5 minutes, and the like), and a state change request must be made in that period to actuate the barrier. In some embodiments, the override only lasts for one operation. That is, each time the user wishes to operate the barrier while the safety system is in an operation failure or misalignment state, the override condition must be newly confirmed. In some embodiments, after the safety system is overridden, any state change requests received within a set period of time would actuate the movable barrier regardless of the state of the safety system.
Next referring to
In step 410, a warning system is activated. The warning system may comprise one or more of a flashing light and an audio alarm at the movable barrier. The warning system generally alerts persons near the movable barrier to manually monitor for obstructions in the path of the movable barrier. In some embodiments, the warning system may also include the device that transmitted the state change request in step 402. For example, the operator may cause a portable transmitter to beep or flash to alert the person who made the state change request that the movable barrier is being operated with an overridden safety system. The warning system may be activated prior and/or during the movement of the movable barrier.
In step 412, the movable barrier is actuated. In some embodiments, step 412 may be the same or similar to step 314 described with reference to
Next referring to
If the movable barrier operator determines that the safety system indicates an obstruction, the process may proceed to step 506 and wait for a user to input an override to override the safety system from a portable transmitter. The portable transmitter may be a transmitter that is remote from the movable barrier operator and travels with a human operator and/or a vehicle. For example, the portable transmitter may be a handheld remote or a vehicles' built-in garage door opener. In some embodiments, the portable transmitter may be a device that is accessible to the user without gaining entrance through the movable barrier including, in some cases, a portable user electronic device such as a mobile phone or tablet having programming allowing control of the movable barrier operator. User input to override the safety system may be one or more of holding down two or more buttons on the portable transmitter and pressing two or more buttons on the portable transmitter in a select pattern among other similar processes. By allowing the user to perform safety system override with a portable transmitter, the user will not need to gain access to a stationary control panel, which is often blocked by the disabled barrier, to perform the override.
If the user input to override the safety system is received in step 506, the operator actuates the movable barrier at step 508. In some embodiments, the system also activates a warning system in step 508 similar to what is described in step 410 in
Optionally, between steps 504 and 506, the operator may provide a notification that an obstruction is indicated by the safety system as to prompt the user to enter the safety override input. For example, the operator may cause either a device at the movable barrier or the transmitter to make a sound or flash. In some embodiments, if the state change request is made through a user device communicating with the operator through a network connection, the operator may send a message to the user device. In some embodiments, prior or during step 506, the operator also determines whether the safety system is in an operation failure or misalignment state similar to step 306 described with reference to
While
The safety system 620 may include one or more safety sensors. The sensors may include one or more of an open edge and close edge safety sensors. The sensors may be sensors with internal contacts or obstruction of photo beams within the edge sensor, photo beams directed in order to protected the area of interest, or radio wave device or capacitive devices which protect an area about the sensing element. For example, the safety system 620 may include the optical emitter 42, the optical detector 46, and the conductive member 125 as described in
The movable barrier actuator 630 includes one or more motors for causing the movement of a movable barrier between at least two positions in response to control signals received from the movable barrier operator 610. In some embodiments, the movable barrier actuator 630 may also function as a safety sensor. For example, if a greater than normal resistance in the direction of movement of the movable barrier actuator 630 is felt, the movable barrier operator 610 may also detect an obstruction.
The RF receiver 640 is configured to receive signals from one or more portable transmitter 650 and relay the signal to the movable barrier operator 610. The RF receiver 640 may be mounted on either side of the movable barrier. The antenna 32 in
The stationary control panel 660 may be a ground control box and a wall-mounted unit and the like. In some embodiments, the stationary control panel 660 may be in the same housing or premise as the movable barrier operator 610. The stationary control panel 660 may communicate with the movable barrier operator 610 through a wired or wireless connection. In some embodiments, the stationary control panel 660 is generally not a portable device and is accessed in the premise behind the barrier. The stationary control panel 660 may include one or more of a lock switch, learn switch, and a command switch. In some embodiments, the stationary control panel 660 may include a button or a switch for enabling safety override. In some embodiments, a user can manually override the safety system by holding down a state change request button on the stationary control panel 660 until the movement of the barrier is complete. The wall control panel 43 in
Optionally, the movable barrier operator system 600 may further include a proximity detector 670 for detecting the proximity of one or more of a portable transmitter, a human operator, and a vehicle. The detector 670 is functionally in communication with the movable barrier operator 610 and may be any one or more of an RF receiver or transceiver, a radio-frequency identification (RFID) sensor, a magnetic field sensor, a loop detector, a toll pass sensor, an ultrasonic distance sensor, a passive infrared (PIR) sensor, an acoustic notch filter, a microphone, a camera, a reflective optical sensor, a tasker light sensor, a weight pressure sensor, an air pressure sensor, a network adapter receiving a GPS coordinate of the portable transmitter, or other device.
In another optional feature, the movable barrier operator system 600 may further include a safety override signal detector 680 for detecting a safety override signal from a user. The safety override signal detector 680 may be any one or more of an RF receiver or transceiver, a microphone, a camera, a light sensor, a network adapter receiving communications from the portable transmitter, a keypad situated outside of the premise, or the like. Optionally, the same structure may be used for both sensing proximity and receiving the safety override signal.
Those skilled in the art will recognize that a wide variety of modifications, alterations, and combinations can be made with respect to the above described embodiments without departing from the scope of the invention, and that such modifications, alterations, and combinations are to be viewed as being within the ambit of the inventive concept.
This application claims the benefit of U.S. Provisional Patent Application No. 61/887,057, filed Oct. 4, 2013, the contents of which is incorporated herein by reference in its entirety.
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