A vehicle safety system typically relies upon a host of electronic sensors designed to monitor and provide data about certain conditions for the vehicle. For instance, an impact detection system may use various types of impact sensors to provide data to an airbag control unit which calculates an angle of impact, severity and force of an impact to determine whether to deploy one or more airbag stages. To improve performance, the electronic sensors are positioned around various portions of a vehicle to optimize sensing capabilities and coverage. However, some areas of a vehicle place increasing operational demands on electronic sensors, oftentimes exposing electronic sensors to harsh environmental conditions. As such, electronic sensors are typically contained within some form of protective housing, collectively referred to sometimes as an electronics package.
As the electronics industry migrates to new processes and technologies, available electronic packages are becoming smaller. While the reduction in size has advantages, such as placement of electronic sensors throughout tight spaces in a vehicle, it also introduces new concerns and precautions. Reductions in size make it more difficult to manufacture or insert an electronic sensor within a corresponding protective housing. Further, the smaller electronic packages generally have smaller contact pads which result in a reduction in connection area between an electronic sensor, such as mounted on a printed circuit board (PCB), and an interface used to electrically connect the PCB to a vehicle system. It is with respect to these and other considerations that the present improvements have been needed.
This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended as an aid in determining the scope of the claimed subject matter.
In one embodiment, an apparatus such as a remote sensor unit (RSU) may comprise a satellite housing having an electrical connector interface portion. The RSU may have an electrical connector disposed within the electrical connector interface portion of the satellite housing. The electrical connector may be arranged to conduct electrical signals for an electronic component having an electronic sensor operative to monitor conditions for a vehicle, for example. The electrical connector may comprise a capture portion at a first end and a pin portion at a second end. The capture portion may have a pair of opposing mechanical contact elements arranged to receive at least one edge of the electronic component. At least one of the opposing mechanical contact elements may comprise an electrical contact element to contact and electrically connect to an electrical contact element formed on a surface of the electronic component. The pin portion may have an electrical contact element to contact and electrically connect to a communications medium for a vehicle monitoring system. Other embodiments are described and claimed.
These and other features and advantages will be apparent from a reading of the following detailed description and a review of the associated drawings. It is to be understood that both the foregoing general description and the following detailed description are explanatory only and are not restrictive of aspects as claimed.
Various embodiments are generally directed to electronic packages suitable for use with a device or system. Some embodiments may be particularly directed to electronic packages suitable for use with a motor vehicle. An electronic package may include some form of an electronic component and a satellite housing. An electronic component may comprise, for example, an electronic sensor mounted on a PCB. A satellite housing is some form of a protective enclosure having an aperture, fitting or interface suitable to receive and retain the electronic component. A satellite housing may conform to any number of defined package geometries. For instance, defined package geometries may be specified by a unique customer, industry standard, or general product offering. Once the electronic component is fitted within the appropriate satellite housing, an electronic package may be formed that is able to withstand harsher environmental conditions that normally would cause damage or malfunctioning of the electronic component. In this manner, the electronic component may provide superior performance and durability throughout the expected life-cycle of the electronic component.
Some embodiments are particularly directed to an electronic package configured as an enhanced remote sensor unit (RSU) for a vehicle monitoring system implemented for a motor vehicle. A vehicle monitoring system may comprise any electronic system using one or more remote sensors to collect information about a motor vehicle. Examples of vehicle monitoring systems may include without limitation vehicle safety systems, vehicle performance systems, vehicle control systems, vehicle testing systems, and any other vehicle monitoring systems suitable for use with electronic sensors. The embodiments are not limited in this context.
In one embodiment, for example, a vehicle monitoring system may include a vehicle safety system. Vehicle safety systems may include both active and passive safety devices and systems. Examples of vehicle safety systems may include crash avoidance systems, driver assistance systems, crash detection or crashworthiness systems, and other vehicle safety systems. It may be appreciated that various embodiments for an enhanced remote sensor unit may be used with other vehicle monitoring systems as well. The embodiments are not limited in this context.
In one embodiment, an enhanced RSU may comprise a satellite housing having an electrical connector interface portion. The RSU may have an electrical connector disposed within the electrical connector interface portion of the satellite housing. The electrical connector may be arranged to conduct electrical signals for an electronic component having an electronic sensor operative to monitor conditions for a vehicle, for example. The electrical connector may comprise a capture portion at a first end and a pin portion at a second end. The capture portion may have a pair of opposing mechanical contact elements arranged to receive at least one edge of the electronic component. In one embodiment, for example, the capture portion may be arranged to capture a front edge of an electronic component. In one embodiment, for example, the capture portion may be arranged to capture one or more side edges of an electronic component. At least one of the opposing mechanical contact elements may comprise an electrical contact element to contact and electrically connect to an electrical contact element formed on a surface of the electronic component. The pin portion may have an electrical contact element to contact and electrically connect to a communications medium for a vehicle monitoring system.
An electrical connector having innovative capture portions for an electronic component may provide several advantages over conventional connectors. For instance, an electrical connector may be disposed within a satellite housing before, during or after manufacture of the satellite housing. This allows flexibility in selecting trade-offs for design, manufacturing and assembly processes associated with an electrical connector for a RSU. In another example, an electronic component may be attached to a capture portion of an electrical connector to form an electronic assembly before or after the electrical connector is disposed within the satellite housing. Furthermore, different sides of an electronic component may be attached to different capture portions of an electrical connector to form an electronic assembly before or after the electrical connector is disposed within the satellite housing. This allows further flexibility in selecting trade-offs for design, manufacturing and assembly processes associated with an electronic assembly for a RSU. Other advantages exist as described further below.
In various embodiments, the electrical connector 100 may be arranged to conduct electrical signals for an electronic component having an electronic sensor operative to monitor conditions for a vehicle. In the illustrated embodiment shown in
As shown, the capture portion 110 may have a pair of opposing mechanical contact elements 112a, 112b arranged to receive at least one edge of an electronic component. In one embodiment, the pair of opposing mechanical contact elements 112a, 112b may be formed with curved surfaces adapted to receiving an edge of an electronic component. For example, the opposing mechanical contact element 112a may have a first curved surface and the opposing mechanical contact element 112b may have a second curved surface, with the first and second curved surfaces curving away from each other. One or both of the opposing mechanical contact elements 112a, 112b may comprise respective electrical contact elements 114a, 114b to contact and electrically connect to an electrical contact element formed on a surface of an electronic component.
In one embodiment, the pair of opposing mechanical contact elements 112a, 112b may be formed with curved surfaces adapted to receive an edge of an electronic component. The curved surfaces may be sized a sufficient distance apart to form a gap 116 having a first gap width W1 which is slightly larger than a width W3 for a given edge at an initial portion of the curved surfaces, and a second gap width W2 that is slightly narrower than the width W3 for the given edge towards a center portion of the curved surfaces. In this manner, the pair of opposing mechanical contact elements 112a, 112b at the first gap width W1 may be sufficiently spaced to receive and guide an edge of an electronic component as it is being inserted into the capture portion 110, while the second gap width W2 provides sufficient force to retain the edge once it has been fully seated into the capture portion 110.
The pin portion 120 may have an electrical contact element 124 to contact and electrically connect to a communications medium for a vehicle monitoring system. In one embodiment, the pin portion 120 may comprise a pin 122 having the electrical contact element 124 to contact and electrically connect to an electrical contact element for a vehicle monitoring system.
The housing interface portion 130 connects the capture portion 110 and the pin portion 120. In one embodiment, the housing interface portion 130 may comprise a first side 132a having a first side surface 134a and a second side 132b having a second side surface 134b. The first side 132a may have a first extension 136a with a first extension surface 138a in a different plane from the first side surface 134a, and the second side 132b may have a second extension 136b with a second extension surface 138b in a different plane from the second side surface 134b. In one embodiment, the housing interface portion 130 may be formed within a corresponding electrical connector interface portion of a satellite housing, and the extensions 136a, 136b may provide enhanced mechanical stability for the electrical connector 100.
The electronic component 202 may comprise a substrate 205 with the electronic sensor 204 mounted on either side of the substrate 205. The electronic sensor 204 may comprise, or be implemented as, one or more circuit components, such as a processor, a memory, a transceiver, and so forth. Other circuit components may include power circuits, filters, capacitors and other circuit elements suitable for implementing the electronic component 202 and/or the electronic sensor 204. The electronic sensor 204 and its constituent parts may be implemented as one or more integrated circuits (ICs) mounted on one or both sides of the substrate 205. It may be appreciated that the electronic sensor 204 may be implemented with any number of circuit components as desired for a given implementation.
The electronic sensor 204 may be arranged to monitor various conditions for a vehicle and output data signals to a vehicle safety system. Examples for the electronic sensor 204 may comprise without limitation an accelerometer, a decelerometer, an impact (crash) sensor, pressure sensor, a wheel speed sensor, a brake pressure sensor, a seat occupancy sensor, a crush zone sensor, a gyroscope, temperature sensor, and any other electronic sensor capable of providing useful information for a vehicle safety system. An accelerometer monitors and measures the acceleration of a vehicle. A decelerometer monitors and measures the deceleration of a vehicle. An impact sensor monitors and measures impact magnitude at a point of impact of a vehicle. A pressure sensor monitors and measures the pressure on the vehicle at the point of impact relative to the normal pressure on the vehicle. A wheel speed sensor or vehicle speed sensor (VSS) is a type of tachometer used for reading the speed of a vehicle's wheel rotation. Wheel speed sensors are used, for example, in anti-lock braking systems. A brake pressure sensor monitors and measures an amount of brake pressure applied to a brake or braking system. A seat occupancy sensor monitors and measures a weight placed on a seat to determine whether a person is sitting in the seat. A seat occupancy sensor may be used to determine whether to deploy an airbag, activate seatbelt pretensioners and other occupancy restraint systems, and so forth. A crush zone sensor measures the amount a vehicle has been crushed or deformed through contact with other objects during a dynamic crash event. A gyroscope measures the rotation of the vehicle to maintain orientation. In various embodiments, the electronic sensor 204 may be implemented as one or more of the sensors described above, or a combination of any of the sensors described above. Other types of electronic sensors may be implemented for the electronic sensor 204 as well. The embodiments are not limited in this context.
The substrate 205 may comprise any known material suitable for receiving an electronic circuit. In one embodiment, for example, the substrate 205 may comprise a printed circuit board (PCB). The PCB may comprise materials such as FR4, Rogers R04003, Kapton, and/or Roger RT/Duroid, for example, and may include one or more conductive traces, via structures, and/or laminates. The PCB also may include a finish such as Gold, Nickel, Tin, or Lead. In various implementations, the PCB may be fabricated using processes such as etching, bonding, drilling, and plating. In some cases, a conductive epoxy may be utilized for various attachments to the substrate 205.
The substrate 205 may comprise a single-sided substrate or a double-sided substrate. The substrate 205 may support single-sided or double-sided population, as well as multi-layer designs (e.g., 2 layer, 4 layer, and so forth). The substrate 205 may include one or more electrical contact elements 206, 208 implemented for the electronic component 202. In one embodiment, for example, the substrate 205 may comprise a double-sided substrate having a first electrical contact element 206a disposed on a first side of the substrate 205, and a second electrical connector 206b disposed on a second side of the substrate 205. Similarly, the substrate 205 may have a first electrical contact element 208a disposed on a first side of the substrate 205, and a second electrical connector 208b disposed on a second side of the substrate 205. It may be appreciated that the electronic component 202 can have any number of electrical contact elements 206, 208 as desired for a given implementation.
The electrical contact elements 206, 208 may be connected to one or more electrical connectors 100 to convey electrical signals to an external device, such as an electrical interconnect or wiring harness for a vehicle safety system.
As shown in
In one embodiment, the pair of opposing mechanical contact elements 112a, 112b may be formed with curved surfaces adapted to receiving an edge 210a, 210b, 210c or 210d of the electronic component 202. The curved surfaces may be sized a sufficient distance apart to form a gap 116 having a first gap width W1 which is slightly larger than a width W3 for an edge 210a, 210b, 210c or 210d at an initial portion of the curved surfaces, and a second gap width W2 that is slightly narrower than the width W3 for an edge 210a, 210b, 210c or 210d towards a center portion of the curved surfaces. In this manner, the pair of opposing mechanical contact elements 112a, 112b at the first gap width W1 may be sufficiently spaced to receive and guide an edge 210a, 210b, 210c or 210d of the electronic component 202 as it is being inserted into the capture portion 110, while the second gap width W2 provides sufficient force to retain an edge 210a, 210b, 210c or 210d of the electronic component 202 once it has been fully seated into the capture portion 110. The force should be enough to allow the electrical contact elements 114a, 114b of the electrical connector 110 to maintain contact and electrically connect to the electrical contact elements 206, 208 formed on a surface of the substrate 204 of the electronic component 202.
The satellite housing 500 is generally arranged to isolate the electronic component 202 from thermal energy, pressure, residual material stress, mechanical stress or other harsh environmental conditions associated with an operating environment for the satellite housing when fastened to a vehicle. In some embodiments, the satellite housing 500 may be formed using an injection molding manufacturing process. Molding material for the satellite housing 500 may generally comprise any thermoplastic or thermosetting plastic materials suitable for an injection molding manufacturing process to create the satellite housing 500. In some embodiments, the molding material may be selected from a class of harder materials capable of withstanding higher temperatures and pressures typically found in an operating environment for a motor vehicle. The satellite housing 500 may be formed from any suitable type of materials, including various synthetic polymers such as PBT, LCP or Nylon. Other suitable materials may comprise a metal or metallic alloy. A particular material for a given implementation may be selected based on a particular operating environment, and should have structural properties to ensure adequate protection for the electronic assembly 200 and sufficient to maintain a fastening load over a life-cycle for a remote sensing unit. Further, the selected material should be sufficiently strong to prevent deformation during a dynamic crash event. The embodiments are not limited in this context.
The satellite housing 500 may be formed in any shape or geometry needed for a given implementation, including standard industry fasteners and interconnects. The satellite housing 500 may be formed in different sizes, shapes, geometries or form factors suitable for mounting a remote sensor unit on a vehicle, and also for interconnecting to a vehicle safety system. In one embodiment, for example, the satellite housing 500 may be manufactured or formed as part of the vehicle part, and the electronic assembly 100 may be inserted into the satellite housing 500 formed in a given vehicle part or component. Suitable vehicle parts may include without limitation vehicle frames, supports, brackets, assemblies or other appropriate structures or components for a vehicle. The embodiments are not limited in this context.
In the illustrated embodiment shown in
The interface portion 504 may have an aperture 508 arranged to expose the capture portions 110a, 110b of the respective electrical connectors 100a, 100b. The interface portion 504 may be formed to interconnect to the electronic component 202. For example, the interface portion 504 may have the aperture 508 with capture portions 110a, 110b of the respective electrical connectors 100a, 100b exposed for electrical connection to the electronic component 202. The aperture 508 protects the capture portions 110a, 110b, while providing a fitting for a mating connector used by a given electronic component 202. It may be appreciated that the aperture 508 of the interface portion 504 may have any size, shape or geometry suitable for corresponding electronic components and associated mating connectors. The embodiments are not limited in this context.
The interface portion 504 may also have an aperture 510 arranged to expose the pin portions 120a, 120b of the respective electrical connectors 100a, 100b. The interface portion 504 may be formed to interconnect to a vehicle safety system. For example, the interface portion 504 may have the aperture 510 with pin portions 120a, 120b of the respective electrical connectors 100a, 100b exposed for electrical connection to a communication media for a vehicle safety system. The aperture 510 protects the pin portions 120a, 120b, while providing a fitting for a mating connector used by a given vehicle safety system. It may be appreciated that the aperture 510 of the interface portion 504 may have any size, shape or geometry suitable for corresponding mating connectors. The embodiments are not limited in this context.
The aperture 508 of the satellite housing 500 may further show one side 608a of an electrical connector interface portion 606 for the satellite housing 500. In various embodiments, the electrical connector interface portion 606 may comprise a portion of the satellite housing 500 arranged to hold or encapsulate a portion of the electrical connector 100, such as the housing interface portion 130 connecting the capture portion 110 and the pin portion 120 of the electrical connector 100.
In one embodiment, the electrical connector interface portion 606 of the satellite housing 500 may encapsulate the housing interface portion 130 of the electrical connector 100 when the satellite housing 500 is created. For example, the electrical connector interface portion 606 may be arranged to encapsulate the housing interface portion 130 during manufacture of the satellite housing 500. The satellite housing 500 may be formed using an injection molding manufacturing process. During the injection molding manufacturing process, the electrical connector interface portion 606 of the satellite housing 500 may be formed around the housing interface portion 130 of the electrical connector 100. The electrical connector 100 may be placed in a mold used to form the satellite housing 500, and positioned so that the molding material used to form the satellite housing 500 completely encapsulates (or overmolds) the housing interface portion 130 of the electrical connector 100. When the electrical connection interface portion 606 is fully formed around the housing interface portion 130 and hardens to a finished product, the extensions 136a, 136b of the housing interface portion 130 may become embedded within the electrical connection interface portion 606 to provide enhanced mechanical stability for the electrical connector 100. It is worthy to note that the satellite housing 500 as shown in
Alternatively, the electrical connector interface portion 606 may be arranged to guide and hold the housing interface portion 130 after manufacture of the satellite housing 500. The electrical connector interface portion 606 may be formed with the pair of apertures 604a, 604b having a geometry matching the pin portions 120a, 120b of the electrical connectors 100a, 100b. In this embodiment, the electrical connector 100 may be formed without the extensions 136a, 136b of the housing interface portion 130 (similar to electrical connector 1200 illustrated and described with reference to
In various embodiments, the apertures 604a, 604b may have a size and geometry matching the pin portions 120a, 120b of the respective electrical connectors 100a, 100b to allow the apertures 604a, 604b to receive the pin portions 120a, 120b when force is applied to the capture portions 110a, 110b of the electrical connectors 100a, 100b. The apertures 604a, 604b may be designed with several tolerances that need to be tightly controlled to ensure a robust electrical connection. The parameters may include without limitation parameters associated with the electronic component 202, such as aperture size, aperture location, plating thickness, plating quality, and so forth. The parameters may further include without limitation parameters associated with the electrical connectors 100a, 100b, such as material hardness, contact surface plating, contact surface texture (e.g., stamping burs, plating irregularities, etc.), and so forth. The parameters may include without limitation parameters associated with the satellite housing 500, such as terminal position/location, board insertion guides (e.g., location features), material shrinkage and/or warping, and so forth. As with any design and manufacturing process, the addition of controls and inspections increases cost. This cost can be measured in process time, equipment cost, and scrap. This cost may be weighed against the benefits of allowing the electrical connectors 100a, 100b to be inserted into the satellite housing 500 after it has been manufactured.
Similar to the aperture 508 of the satellite housing 500 as shown in
Furthermore, the electrical connector 1200 may have a housing interface portion 1230 similar to the housing interface portion 130 of the electrical connector 100. However, the electrical connector 1200 does not have extensions 136a, 136b. Rather, the housing interface portion 1230 has a uniform surface with that of a pin portion 1220. Removal of the extensions 136a, 136b allows the electrical connector 1200 to be directly inserted into the apertures 604a, 604b of the electrical connector interface portion 606 for the satellite housing 500 after the satellite housing has been manufactured, thereby removing the manufacturing complexities associated with positioning and encapsulating the electrical connector 1200 within the electrical connector interface portion 606 during the injection molding process for the satellite housing 500.
As shown in
As with the capture portion 110, one or both of the opposing mechanical contact elements from each of the first and second pairs of opposing mechanical contact elements may comprise an electrical contact element to contact and electrically connect to a corresponding electrical contact element formed on a surface of the electronic component 202. The electronic component 202 may be modified so that the contact elements are moved from the front edge 210a to one or both of the side edges 210c, 210d of the electronic component 202 to correspond to the electrical contact elements of the electronic component 202.
The capture portion 1300 provides enhanced mechanical stability for capturing and holding the electronic component 202. Furthermore, the capture portion 1300 allows for multiple electrical contact elements thereby enhancing electrical signaling and/or increasing a number of electrical components implemented for the electronic component 202.
The vehicle monitoring system 1510 may comprise, or be implemented as, any safety system utilizing remote sensor units and suitable for the motor vehicle 1502. Vehicle monitoring system 1510 may comprise both active and passive safety devices and systems. Examples of vehicle safety systems 1510 may include without limitation crash avoidance systems, driver assistance systems, crash detection systems (or crashworthiness systems), and other vehicle safety systems. Further examples of vehicle safety systems 1510 may comprise without limitation seatbelt pretensioner systems, airbag systems, occupant restraint system, infrared night vision systems to increase seeing distance beyond headlamp range, tire pressure monitoring systems or deflation detection systems, reverse backup sensors which alert drivers to difficult-to-see objects in their path when reversing, backup cameras, lane departure warning systems to alert the driver of an unintended departure from the intended lane of travel, traction control systems which restore traction if driven wheels begin to spin, electronic stability control which intervenes to avert an impending loss of control, anti-lock braking systems, electronic brakeforce distribution systems, emergency brake assist systems, cornering brake control systems, adaptive headlamps swivels headlamps around corners, automatic high beams which automatically adapts the headlamp range to the distance of vehicles ahead or which are oncoming, adaptive cruise control which maintains a safe distance from the vehicle in front, precrash systems, automated parking systems, among others. The embodiments are not limited in this context.
In the illustrated embodiment shown in
The vehicle monitoring system 1510 may also have a controller 1512 connected to the pin portions 120a, 120b of the sensor assembly 100 (or sensor assembly 1200 or sensor assemblies 100, 1200 modified with the capture portion 1300). The controller 1512 may be operative to receive data from the electronic sensor 204 and use the data to determine whether to activate a safety system for the motor vehicle 1502. The controller 1512 may comprise, or be implemented as, a part of an electronic control unit (ECU) or airbag control unit (airbag control unit) for the vehicle monitoring system 1510. The controller 1512 and/or the ECU and/or the airbag control unit may be enclosed in a metal housing for protection, and bolted somewhere to the motor vehicle 1502 (e.g., the vehicle frame). In some instances, the controller 1512 may be implemented as part of a remote sensor unit 1514-m, or may itself be a remote sensor unit 1514-m.
In one embodiment, for example, the vehicle monitoring system 1510 may comprise multiple remote sensor units 1514-m each with the pin portions 120a, 120b connected to the controller 1512. The controller 1512 may be operative to receive multiple sets of data from the electronic sensors 204 and use the multiple sets of data to determine whether to deploy a safety system for a vehicle. For instance, the vehicle monitoring system 1510 may be implemented as a crash detection system and the remote sensor units 1514-m may be impact or crash detection sensors. The vehicle monitoring system 1510 may monitor and collect data from the remote sensor units 1514-m by the controller 112 which is implemented as part of an airbag control unit. The airbag control unit may calculate an angle of impact, severity and force of an impact to determine whether to deploy one or more airbag stages. It may be appreciated that this is merely one example for the vehicle monitoring system 1510 and the remote sensor units 1514-m, and other implementations are possible as well. The embodiments are not limited in this context.
Various embodiments, such as the electronic component 202 and electronic sensor 204 of the electronic assembly 200, may be implemented using hardware elements, software elements, or a combination of both. Examples of hardware elements may include devices, components, processors, microprocessors, circuits, circuit elements (e.g., transistors, resistors, capacitors, inductors, and so forth), integrated circuits, application specific integrated circuits (ASIC), programmable logic devices (PLD), digital signal processors (DSP), field programmable gate array (FPGA), memory units, logic gates, registers, semiconductor device, chips, microchips, chip sets, and so forth. For instance, the electronic component 202 may include various processors and communications interfaces, including wired or wireless communications interfaces. Examples of wireless communications interfaces may include wireless transceivers or radios and supporting architecture (e.g., filters, baseband processors, antennas, and so forth). Examples of software elements may include software components, programs, applications, computer programs, application programs, system programs, machine programs, operating system software, middleware, firmware, software modules, routines, subroutines, functions, methods, procedures, software interfaces, application program interfaces (API), instruction sets, computing code, computer code, code segments, computer code segments, words, values, symbols, or any combination thereof. Determining whether an embodiment is implemented using hardware elements and/or software elements may vary in accordance with any number of factors, such as desired computational rate, power levels, heat tolerances, processing cycle budget, input data rates, output data rates, memory resources, data bus speeds and other design or performance constraints, as desired for a given implementation.
Some embodiments may be described using the expression “one embodiment” or “an embodiment” along with their derivatives. These terms mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.
Some embodiments may be described using the expression “coupled” and “connected” along with their derivatives. These terms are not necessarily intended as synonyms for each other. For example, some embodiments may be described using the terms “connected” and/or “coupled” to indicate that two or more elements are in direct physical or electrical contact with each other. The term “coupled,” however, may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other.
It is emphasized that the Abstract of the Disclosure is provided to comply with 37C.F.R. Section 1.72(b), requiring an abstract that will allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it can be seen that various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein,” respectively. Moreover, the terms “first,” “second,” “third,” and so forth, are used merely as labels, and are not intended to impose numerical requirements on their objects.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
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