Safety air bag controller and safety air bag system

Abstract

The utility model provides a safety air bag controller and a safety air bag system. The safety air bag controller comprises a shell and two PCBs. The two PCBs are arranged in the shell, one of the two PCBs is a basic function board, the other PCB is an extended function board, and the basic function board is used for being connected with a safety air bag; one of the two PCBs is provided with a first connector, the other PCB is provided with a second connector, when the first connector and the second connector are not connected, the basic function board controls the safety air bag to work, and when the first connector and the second connector are connected, the basic function board and the extended function board control the safety air bag to work. According to the utility model, the original traditional air bag restraint system controller can be expanded into the air bag restraint system controller integrated with the active and passive safety fusion function, so that the problems of insufficient real-time performance of pre-collision signals, low priority and relatively high time delay when the original traditional air bag restraint system controller applies the active and passive safety fusion function are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety airbag control, in particular to a safety airbag controller and a safety airbag system. Background Art

[0002] With the development of autonomous driving, the hardware performance of the cameras and other sensing devices currently equipped in the automotive industry and the recognition capabilities of the perception algorithms are becoming increasingly powerful. The research results are also gradually being used in the field of traditional passive safety, resulting in a series of new functions for the integration of active and passive safety. The main one is the integration of multiple information (camera, radar, acceleration and other signals), which compensates for the deficiencies of traditional collision sensors and airbag controllers based on the fused pre-collision information (i.e. Pre-crash information), thereby maximizing collision safety performance.

[0003] In the past, in the active and passive safety fusion function, pre-collision information came from the intelligent driving domain controller, which was required to process the original signals from the camera, radar, etc. before transmitting them to the airbag controller through the CAN bus. However, with the further refinement of the active and passive safety fusion function requirements, the airbag detonation strategy needs to include information such as the occupant's body shape, sitting posture, periodic predicted occupant injury, and acceleration at the time of collision. In addition, the performance improvement of the airbag detonation is originally a millisecond-level optimization, so the real-time feedback, priority processing, and latency requirements for pre-collision information are getting higher and higher. In the above context, the airbag controller, which was originally processed by the intelligent driving domain controller to process the original signals from the camera, radar, etc. and then sent out, is difficult to meet the current needs of active and passive safety fusion. Utility Model Content

[0004] The utility model provides an airbag controller and an airbag system to solve the problem that the existing airbag controller is difficult to meet the current demand for active and passive safety integration.

[0005] An airbag controller comprises a housing and two PCB boards;

[0006] Two PCB boards are arranged in the housing, one of the two PCB boards is a basic function board, and the other is an extended function board, and the basic function board is used to connect the airbag;

[0007] One of the two PCB boards is provided with a first connector, and the other is provided with a second connector. When the first connector and the second connector are not connected, the basic function board controls the operation of the airbag. When the first connector and the second connector are connected, the basic function board and the extended function board control the operation of the airbag.

[0008] Preferably, the basic function board is provided with an MCU chip, a sensing module connected to the MCU chip, an ignition chip, a first transceiver module and a first memory, the ignition chip is connected to the sensing module and is used to connect to the airbag;

[0009] The expansion function board is provided with a SOC chip, a second transceiver module connected to the SOC chip, a deserializer component, a second storage component and a FRAKRA connector;

[0010] The MCU chip and the SOC chip communicate with each other through the first connector and the second connector.

[0011] Preferably, the two PCB boards are arranged in the housing at intervals along the first direction, and their projections along the first direction at least partially overlap.

[0012] Preferably, the first connector and the second connector are two board-to-board connectors that match each other;

[0013] The two board-to-board connectors are arranged between the two PCB boards.

[0014] Preferably, the airbag controller further comprises a positioning component; the positioning component is arranged between the two PCB boards.

[0015] Preferably, the positioning assembly comprises matching positioning pins and a fixing plate; the positioning pins are arranged on one of the PCB boards, and the fixing plate is arranged on the other of the PCB boards.

[0016] Preferably, the housing comprises a first housing and a second housing; the first housing and the second housing match to form an accommodating space for placing the PCB board.

[0017] Preferably, a snap-in groove is provided on the first shell and / or the second shell;

[0018] The airbag controller further comprises an external connector; the external connector is installed in the card slot;

[0019] The first end of the external connector is connected to any one of the PCB boards, and the second end of the external connector is used to connect to an external device.

[0020] Preferably, the housing further comprises a mounting plate; the mounting plate is arranged on the housing, and the mounting plate is used to fix the airbag controller on a vehicle body sheet metal.

[0021] An airbag system comprises an airbag and the airbag controller;

[0022] The basic function board in the airbag controller is connected to the airbag.

[0023] The airbag controller provided by the embodiment of the utility model is installed on the body sheet metal, specifically including a shell and two PCB boards; during installation, the two PCB boards are set in the shell, the two PCB boards are used to connect the airbag, one of the two PCB boards is a basic function board, and the other is an extended function board, the basic function board here is connected to the airbag, and is a PCB board used to realize the basic functions of traditional airbag control; correspondingly, the extended function board is connected to the basic function board, and is a PCB board used to realize the extended functions of active and passive safety fusion control. One of the two PCB boards is provided with a first connector, and the other is provided with a second connector, and both the first connector and the second connector are board-to-board connectors. When the first connector and the second connector are not connected, the basic function board controls the operation of the airbag. When the first connector and the second connector are connected, the basic function board and the extended function board control the operation of the airbag. This arrangement can expand the original traditional airbag controller into an airbag controller with integrated active and passive safety fusion functions, which solves the problems of insufficient real-time performance, low priority and high latency of pre-collision signals encountered by the original traditional airbag controller when applying the active and passive safety fusion function. It removes the original limitations on the refined active and passive safety fusion function in hardware design, and provides great possibilities for the expansion of the active and passive safety fusion function in the future. The airbag controller can flexibly cut or expand functions according to the functional requirements and positioning of the vehicle. It is not a fixed solution. The two PCB boards of the airbag controller are low-coupled and high-cohesion in hardware and software design. Because the connectors of the two PCB boards are completely independent, the hardware only needs to decide whether the first connector and the second connector are connected; when the first connector and the second connector are not connected, the basic function board controls the operation of the airbag alone. At this time, the airbag controller can be understood as a traditional airbag controller to control the operation of the airbag; when the first connector and the second connector are connected, the basic function board and the extended function board jointly control the operation of the airbag. At this time, the airbag controller can be understood as an active and passive safety fusion control device, and the rest can be simply adapted by software. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1is an exploded view of an airbag controller in one embodiment of the utility model;

[0026] Figure 2 It is a layout diagram of a PCB board in one embodiment of the utility model.

[0027] Among them, 1. shell; 101. first shell; 102. second shell; 103. card slot; 104. mounting plate; 2. PCB board; 3. first connector; 4. second connector; 5. external connector; 6. MCU chip; 7. sensing module; 8. ignition chip; 9. first transceiver module; 10. first memory; 11. SOC chip; 12. second transceiver module; 13. deserializer component; 14. second storage component; 15. FRAKRA connector. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The embodiment of the utility model provides an airbag controller, which is an important component of the airbag system. Its main function is to capture the collision signal through the sensor, analyze, judge and process it, and then issue an ignition command in a timely manner to drive the gas generator to ignite, thereby detonating the airbag, so as to protect the driver and passengers and avoid personal injury caused by collision with rigid objects in the car.

[0032] Reference Figure 1 and Figure 2 The airbag controller includes a shell 1 and two PCB boards 2; the two PCB boards 2 are arranged in the shell 1, one of the two PCB boards 2 is a basic function board, and the other is an extended function board, and the basic function board is used to connect the airbag; one of the two PCB boards 2 is provided with a first connector 3, and the other is provided with a second connector 4. When the first connector 3 and the second connector 4 are not connected, the basic function board controls the operation of the airbag, and when the first connector 3 and the second connector 4 are connected, the basic function board and the extended function board control the operation of the airbag.

[0033] As an example, the airbag controller is installed on the body sheet metal, specifically including a housing 1 and two PCB boards 2; during installation, the two PCB boards 2 are set in the housing 1, and the two PCB boards 2 are used to connect the airbags. One of the two PCB boards 2 is a basic function board, and the other is an extended function board. The basic function board here is connected to the airbag to realize the basic functions of traditional airbag control; accordingly, the extended function board is connected to the basic function board to realize the extended functions of active and passive safety fusion control. One of the two PCB boards 2 is provided with a first connector 3, and the other is provided with a second connector 4. The first connector 3 and the second connector 4 are both board-to-board connectors. When the first connector 3 and the second connector 4 are not connected, the basic function board controls the operation of the airbag. When the first connector 3 and the second connector 4 are connected, the basic function board and the extended function board control the operation of the airbag. This arrangement can expand the original traditional airbag controller into an airbag controller with integrated active and passive safety fusion functions, which solves the problems of insufficient real-time performance, low priority and high latency of the pre-collision signal encountered by the original traditional airbag controller when applying the active and passive safety fusion function. It removes the restrictions on the refined active and passive safety fusion function in hardware design and provides great possibilities for the expansion of the active and passive safety fusion function in the future. The airbag controller can flexibly tailor or expand functions according to the functional requirements and positioning of the vehicle. It is not a fixed solution. The two PCB boards 2 of the airbag controller are low-coupled and high-cohesion in hardware and software design. Because the connectors of the two PCB boards 2 are completely independent, the hardware only needs to decide whether the first connector 3 and the second connector 4 are connected; when the first connector 3 and the second connector 4 are not connected, the basic function board controls the operation of the airbag alone. At this time, the airbag controller can be understood as a traditional airbag controller to control the operation of the airbag; when the first connector 3 and the second connector 4 are connected, the basic function board and the extended function board jointly control the operation of the airbag. At this time, the airbag controller can be understood as an active and passive safety fusion control device, and the rest can be simply adapted by software.

[0034] In one embodiment, referring to Figure 2 The basic function board is provided with an MCU chip 6, a sensing module 7 connected to the MCU chip 6, an ignition chip 8, a first transceiver module 9 and a first memory 10. The ignition chip 8 is connected to the sensing module 7 and is used to connect the airbag; the extended function board is provided with a SOC chip 11, a second transceiver module 12 connected to the SOC chip 11, a deserializer component 13, a second storage component 14 and a FRAKRA connector 15; the MCU chip 6 and the SOC chip 11 communicate through the first connector 3 and the second connector 4.

[0035] As an example, the basic function board is provided with an MCU chip 6, a sensing module 7 connected to the MCU chip 6, an ignition chip 8, a first transceiver module 9 and a first memory 10. The sensing module 7 includes an inertial sensor (such as a six-axis IMU sensor) and an acceleration sensor; the six-axis IMU sensor is used to detect whether a rollover condition occurs; the acceleration sensor is used to verify the rollover condition. Among them, the acceleration sensor includes a first acceleration sensor (xz axis) and a second acceleration sensor (xy axis). The ignition chip 8 may include a first ignition chip A and a second ignition chip B. The ignition chip 8 is connected to the sensing module 7 and is used to connect the airbag. Specifically, the first ignition chip A is connected to the acceleration sensor, and the second ignition chip B is connected to the six-axis IMU sensor. The first ignition chip A and the second ignition chip B are used to connect the airbag. The airbag can be controlled to work according to the information collected by the sensing module 7, and can also be controlled according to the control signal sent by the MCU.

[0036] Furthermore, the first transceiver module 9 and the first memory 10 are mounted on the basic function board; the first transceiver module 9 is used to send and receive signals transmitted by the MCU chip 6, and may include but is not limited to the first transceiver A and the first transceiver B; the first memory 10 is a powered erasable programmable read-only memory, which is used to store a large amount of active and passive safety fusion algorithm process data for after-sales events. Such a setting is based on the high functional safety level of the airbag controller and the particularity of the ignition dedicated chip it uses, and retains the design part of the original airbag controller.

[0037] As an example, the extended function board is provided with a SOC chip 11, a second transceiver module 12 connected to the SOC chip 11, a deserializer component 13, a second storage component 14, and a FRAKRA connector 15; the second transceiver module 12 is used to transmit and receive signals transmitted by the SOC chip 11, and may include but is not limited to the second transceiver A, the second transceiver B, the LIN transceiver, and the Ethernet transceiver; the deserializer component 13 is used to realize the conversion between serial communication and parallel communication, and may include but is not limited to the first deserializer and the second deserializer; the second storage component 14 is used to store information, and may include but is not limited to LPDDR4 memory and eMMC storage; the FRAKRA connector 15 is used for the transmission of signals such as video streams. In addition, a PMIC power management chip connected to the SOC chip 11 is mounted on the extended function board, which is an integrated circuit for managing and controlling power supply. This setting can add a set of extended function boards that independently process traditional cameras, 3DTOF cameras, millimeter-wave radar raw signals, and integrated perception recognition algorithms.

[0038] The MCU chip 6 and the SOC chip 11 communicate through the first connector 3 and the second connector 4. When the first connector 3 and the second connector 4 are not connected, the basic function board controls the operation of the airbag alone. At this time, the airbag controller can be understood as a traditional airbag controller, which controls the operation of the airbag; when the first connector 3 and the second connector 4 are connected, the basic function board and the extended function board jointly control the operation of the airbag. At this time, the airbag controller can be understood as an active and passive safety fusion control device, and the rest can be simply adapted by software.

[0039] In one embodiment, referring to Figure 1 The two PCB boards 2 are arranged in the housing 1 at intervals along the first direction, and their projections along the first direction at least partially overlap.

[0040] As an example, two PCB boards 2 are arranged in the shell 1 at intervals along the first direction, and the projections of the two PCB boards 2 along the first direction at least partially overlap. Such a design not only ensures the high functional safety level design of the original airbag controller detonation function without causing any adverse effects on its original function, but also compared with the solution of designing all the functions of the active and passive safety fusion control device on a single PCB board 2, by cleverly utilizing the space in the first direction (for example, the Z direction), the layout space of the PCB board 2 in the plane perpendicular to the first direction (XY plane) is saved, thereby making it more feasible when arranging the entire vehicle.

[0041] In one embodiment, referring to Figure 2 The first connector 3 and the second connector 4 are two board-to-board connectors that match each other; the two board-to-board connectors are arranged between the two PCB boards 2.

[0042] As an example, the first connector 3 and the second connector 4 are two board-to-board connectors that match each other; the two board-to-board connectors are arranged between the two PCB boards 2 to facilitate connecting the two PCB boards 2.

[0043] In one embodiment, referring to Figure 1 The airbag controller also includes a positioning component; the positioning component is arranged between the two PCB boards 2.

[0044] As an example, the airbag controller also includes a positioning component; the positioning component is arranged between the two PCB boards 2, which can provide support and positioning for the PCB boards 2 to ensure that the stacking between the two PCB boards 2 is more stable.

[0045] In one embodiment, referring to Figure 1 The positioning assembly includes matching positioning pins and a fixing plate; the positioning pin is arranged on one PCB board 2, and the fixing plate is arranged on another PCB board 2.

[0046] As an example, the positioning assembly includes a positioning pin and a fixing plate; during installation, the positioning pin is set on one PCB board 2, and the fixing plate is set on another PCB board 2. The positioning pin and the fixing plate match to provide support and positioning for the PCB board 2, ensuring that the stacking of the two PCB boards 2 is more stable.

[0047] In one embodiment, referring to Figure 1 The housing 1 includes a first housing 101 and a second housing 102 ; the first housing 101 and the second housing 102 match to form an accommodating space for placing the PCB board 2 .

[0048] As an example, the shell 1 includes a first shell 101 and a second shell 102; during installation, the first shell 101 and the second shell 102 are matched to form a housing space for placing the PCB board 2, which can provide protection for the PCB board 2 and prevent the PCB board 2 from being damaged by collision.

[0049] In one embodiment, referring to Figure 1 A card slot 103 is provided on the first shell 101 or the second shell 102; the airbag controller also includes an external connector 5; the external connector 5 is installed in the card slot 103; the first end of the external connector 5 is connected to any PCB board 2, and the second end of the external connector 5 is used to connect an external device.

[0050] As an example, a card slot 103 is provided on the first shell 101 or the second shell 102, and the airbag controller also includes an external connector 5; when the PCB board 2 is installed in the shell 1, the external connector 5 is installed in the card slot 103; the first end of the external connector 5 is connected to any PCB board 2, and the second end of the external connector 5 is used to connect to an external device, while ensuring the stable installation of the PCB board 2, it will not affect the connection with the external device. Among them, the external connector 5 includes a USB3.0 connector, an Ethernet socket, a first male connector and a second male connector; the first male connector is set on the extended function board, and the second male connector is set on the basic function board. The USB3.0 connector is used for software package pushing and data export, and the male connector contains a power line, a ground line and other pins for connecting other external components.

[0051] In one embodiment, referring to Figure 1 The housing 1 further includes a mounting plate 104; the mounting plate 104 is disposed on the housing 1, and the mounting plate 104 is used to fix the airbag controller on the vehicle body sheet metal.

[0052] As an example, the shell 1 also includes a mounting plate 104; the mounting plate 104 is set on the shell 1, and according to actual conditions, it can be set on the first shell 101 or on the second shell 102, and the mounting plate 104 is placed on the body sheet metal, and fasteners are used to penetrate the mounting plate 104 and the body sheet metal to fix the airbag controller.

[0053] The embodiment of the utility model provides an airbag system, comprising an airbag and an airbag controller; a basic function board in the airbag controller is connected to the airbag.

[0054] As an example, the airbag controller is installed on the body sheet metal, specifically including a housing 1 and two PCB boards 2; during installation, the two PCB boards 2 are set in the housing 1, and the two PCB boards 2 are used to connect the airbags. One of the two PCB boards 2 is a basic function board, and the other is an extended function board. The basic function board here is connected to the airbag to realize the basic functions of traditional airbag control; accordingly, the extended function board is connected to the basic function board to realize the extended functions of active and passive safety fusion control. One of the two PCB boards 2 is provided with a first connector 3, and the other is provided with a second connector 4. The first connector 3 and the second connector 4 are both board-to-board connectors. When the first connector 3 and the second connector 4 are not connected, the basic function board controls the operation of the airbag. When the first connector 3 and the second connector 4 are connected, the basic function board and the extended function board control the operation of the airbag. This arrangement can expand the original traditional airbag controller into an airbag controller with integrated active and passive safety fusion functions, which solves the problems of insufficient real-time performance, low priority and high latency of the pre-collision signal encountered by the original traditional airbag controller when implementing the active and passive safety fusion function. It removes the restrictions on the refined active and passive safety fusion function in hardware design and provides great possibilities for the expansion of the active and passive safety fusion function in the future. The airbag controller can flexibly tailor or expand functions according to the functional requirements and positioning of the vehicle. It is not a fixed solution. The two PCB boards 2 of the airbag controller are low-coupled and high-cohesion in hardware and software design. Because the connectors of the two PCB boards 2 are completely independent, the hardware only needs to decide whether the first connector 3 and the second connector 4 are connected; when the first connector 3 and the second connector 4 are not connected, the basic function board controls the operation of the airbag alone. At this time, the airbag controller can be understood as a traditional airbag controller to control the operation of the airbag; when the first connector 3 and the second connector 4 are connected, the basic function board and the extended function board jointly control the operation of the airbag. At this time, the airbag controller can be understood as an active and passive safety fusion control device, and the rest can be simply adapted by software.

[0055] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. An airbag controller, characterized in that: Including a housing and two PCB boards; Two PCB boards are arranged in the housing, one of the two PCB boards is a basic function board, and the other is an extended function board, and the basic function board is used to connect the airbag; One of the two PCB boards is provided with a first connector, and the other is provided with a second connector. When the first connector and the second connector are not connected, the basic function board controls the operation of the airbag. When the first connector and the second connector are connected, the basic function board and the extended function board control the operation of the airbag.

2. The airbag controller according to claim 1, characterized in that: The basic function board is provided with an MCU chip, a sensing module connected to the MCU chip, an ignition chip, a first transceiver module and a first memory, wherein the ignition chip is connected to the sensing module and is used to connect to the airbag; The expansion function board is provided with a SOC chip, a second transceiver module connected to the SOC chip, a deserializer component, a second storage component and a FRAKRA connector; The MCU chip and the SOC chip communicate with each other through the first connector and the second connector.

3. The airbag controller according to claim 1, characterized in that: The two PCB boards are arranged in the housing at intervals along a first direction, and their projections along the first direction at least partially overlap.

4. The airbag controller according to claim 1, characterized in that: The first connector and the second connector are two board-to-board connectors that match each other; The two board-to-board connectors are arranged between the two PCB boards.

5. The airbag controller according to claim 1, characterized in that: The airbag controller also includes a positioning component; the positioning component is arranged between the two PCB boards.

6. The airbag controller according to claim 5, characterized in that: The positioning assembly includes matching positioning pins and a fixing plate; the positioning pin is arranged on one of the PCB boards, and the fixing plate is arranged on the other of the PCB boards.

7. The airbag controller according to claim 1, characterized in that: The housing includes a first housing and a second housing; the first housing and the second housing match to form an accommodating space for placing the PCB board.

8. The airbag controller according to claim 7, characterized in that: A snap-in groove is provided on the first shell and / or the second shell; The airbag controller further comprises an external connector, which is installed in the card slot; The first end of the external connector is connected to any one of the PCB boards, and the second end of the external connector is used to connect to an external device.

9. The airbag controller according to claim 1, characterized in that: The housing further comprises a mounting plate; the mounting plate is arranged on the housing, and the mounting plate is used to fix the airbag controller on a vehicle body sheet metal.

10. An airbag system, characterized in that: Comprising an airbag and an airbag controller according to any one of claims 1 to 9; The basic function board in the airbag controller is connected to the airbag.

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