Automobile safety air bag controller 32 loop diagnosis equipment

Abstract

The utility model relates to the technical field of diagnostic equipment, and discloses automobile safety air bag controller 32 loop diagnostic equipment, which comprises an upper shell, an integrated circuit structure and a bottom plate, and the integrated circuit structure is detachably embedded between the upper shell and the bottom plate. According to the utility model, the working environment of the automobile safety airbag controller can be simulated, and the performance of the automobile safety airbag controller can be comprehensively tested; multiple functions such as environment simulation test, fault positioning and real-time display are integrated, so that the test efficiency and accuracy are improved; multiple communication interfaces are supported, interaction with an upper computer is achieved, and data transmission and analysis are facilitated; various performances of the automobile safety airbag controller can be accurately tested by simulating working environments such as a resistance value of an airbag detonation loop and peripheral sensor communication, and the quality and the reliability of the automobile safety airbag controller are ensured; the equipment is simple to operate and easy to use, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diagnostic equipment, in particular to a 32-circuit diagnostic equipment for an automobile safety airbag controller. Background Art

[0002] With the continuous development of automobile technology, people's requirements for driving safety are getting higher and higher. As an important passive safety device on the car, the improvement of the performance of airbags is crucial to reducing casualties in accidents. As the core control device for airbag deployment, the automobile airbag controller (Airbag Control Unit, referred to as ACU) integrates the vehicle acceleration sensor chip, CPU (computing unit), EDR (recording unit) and corresponding peripheral equipment. Its main function is to sample and analyze the driving status of the vehicle in real time. When the vehicle collides, it can detect the changes in the speed and posture of the vehicle during the collision in time. The CPU built into the ACU performs real-time analysis and pre-processing of parameters such as speed and posture, and analyzes according to different calculation models to determine whether the airbag deployment conditions are met, so as to perform corresponding actions.

[0003] Currently, automakers are increasing the number of airbag loops to improve their response speed and accuracy, thereby ensuring faster and more accurate protection for passengers in the event of a collision. The number of airbags configured in passenger cars (loops for short) and the number of occupant detection and seat belt buckle switches (switches for short) are constantly increasing, from the original 4-16 loops and 2-10 switches to 32 loops and 20 switches. The original controller can no longer meet the protection needs of vehicle safety. Currently, the 32-loop controller has entered the testing phase.

[0004] As the number of circuits increases, the complexity of the ACU increases exponentially. It is particularly important to conduct environmental simulation and testing before leaving the factory to prevent faulty or hidden parts from entering the car factory. A corresponding 32-circuit ACU supporting diagnosis and testing device is needed. The utility model not only meets the environmental simulation test requirements for the 32-circuit ACU, but also integrates a 20-way switch detection interface, TYPE-C input multi-function power supply, CAN communication interface, LCD control unit, TF card, vehicle OBD interface and corresponding operation switches, indicator lights, LED display and other functions to meet the test requirements for various performance indicators of the ACU such as each circuit open, short circuit, switch resistance change, CAN communication parameters, different voltage levels, etc. The device can accurately locate the various fault points inside the ACU and display the fault location in real time. At the same time, it can interact with the host computer through CAN, KLine, meet the requirements of rapid troubleshooting, and improve production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a circuit diagnostic device for an automobile airbag controller 32 to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a vehicle airbag controller 32 circuit diagnostic device, comprising: an upper shell, an integrated circuit structure and a bottom plate, wherein the integrated circuit structure is detachably embedded between the upper shell and the bottom plate, and the integrated circuit structure comprises:

[0007] Processing circuit boards, used to fix all circuit components and digital chip circuits;

[0008] 3-position 3-pin rocker switch, the number of which is 32 sets, and which is arranged at the bottom of the front side of the processing circuit board;

[0009] A burning mode guide button is arranged at the bottom of the side of the processing circuit board;

[0010] A burning status indicator light is arranged on the side of the burning mode guide button and is electrically connected to the burning mode guide button;

[0011] A socket, arranged at the upper left corner of the processing circuit board, for connecting a 12 or 24V DC power supply;

[0012] A DC input socket is provided at the bottom of the socket and is used to connect a mobile phone fast charging power bank or a charging head;

[0013] A serial port socket, arranged at the bottom of the DC input socket, with an internal integrated RS232 to USB circuit;

[0014] A TF card slot is provided on the side of the serial port socket and is used for storing the ACU program during offline burning;

[0015] A normal power switch, which is a 3-speed 6-pin rocker type, is arranged on the side of the TF card slot and is used to switch and shut down the DC power supply or power bank input;

[0016] Instrument light ON switch, the instrument light ON switch is a 2-speed 6-pin rocker type, and is arranged on the side of the normal power switch;

[0017] A normal power status indicator light, arranged on the side of the instrument light ON switch;

[0018] The instrument ON power indicator light is arranged on the side of the normal power status indicator light.

[0019] Preferably, the automobile airbag controller 32 circuit diagnostic equipment also includes: a DB9 female socket and a DB9 male socket, which are arranged on the side of the instrument ON power indicator light, the DB9 female socket is used to connect to the OBD port of the vehicle body, and the DB9 male socket is internally connected to the CAN bus and is reserved for the diagnostic equipment of the experimental institution.

[0020] Preferably, each group of the 3-speed 3-pin rocker switches includes a switch, a two-color LED and a two-hole socket, which are used to simulate the switching, connection, status operation and indication of 32 airbag circuits to ground, positive power supply and 2Ω state.

[0021] Preferably, the automobile airbag controller 32 circuit diagnostic equipment further includes:

[0022] A CAN to USB circuit is locked on the back of the processing circuit board by means of a fixing bolt of the CAN circuit;

[0023] A spring-loaded retractable pin is disposed on the outer wall of the CAN-to-USB circuit and is used to connect the high and low pins and the terminal resistor pin of the CAN-to-USB circuit to the processing circuit board;

[0024] The switch and socket of the internal and external sensor circuit are arranged on the side of the CAN to USB circuit;

[0025] K-line status indicator light, arranged on the side of the switch and socket of the internal and external sensor circuit;

[0026] A reserved LED is arranged on the side of the K-line status indicator light;

[0027] An application configuration mode indicator light is arranged on the side of the reserved LED;

[0028] Status indicator light and socket, arranged on the side of the application configuration mode indicator light, for two-way collision output, WL, PAD status indication;

[0029] A status switch, which is arranged on the side of the status indicator light and the socket, and is used for switching between two-way collision output, WL, and PAD status;

[0030] A 6-way switch, arranged on the side of the state switching switch, is used for mode selection, deception reset, handshake with a voltage greater than 15V, and use of two CAN terminal resistors;

[0031] A digital tube voltmeter, arranged on the side of the 6-way switch, for displaying the current handshake voltage;

[0032] The ACU basic pin socket is arranged on the side of the expansion circuit and the lock switch socket, including the 1st to 16th airbag circuits, the 1st to 10th lock switches, the 1st to 6th PSI5, CAN communication and other pins.

[0033] Preferably, the automobile airbag controller 32 circuit diagnostic equipment also includes: an expansion circuit and a lock switch socket, which is arranged on the side of the digital tube voltmeter, and is used to connect the 17th to 32nd airbag circuits, the 11th to 20th lock switches and the 7th to 12th PSI5 communication pins.

[0034] Preferably, the processing circuit board has a built-in CPU control unit, which is responsible for the coordination and scheduling of the input, output, communication, display, switch, and storage functions of the entire device.

[0035] The utility model proposes a vehicle airbag controller 32-circuit diagnostic device, which has the following beneficial effects:

[0036] 1. It can simulate the working environment of the automobile airbag controller and conduct a comprehensive test of its performance.

[0037] 2. Integrates multiple functions, such as environmental simulation test, fault location, real-time display, etc., to improve test efficiency and accuracy.

[0038] 3. Support multiple communication interfaces to realize interaction with the host computer and facilitate data transmission and analysis.

[0039] 4. By simulating the resistance value of the airbag detonation circuit, peripheral sensor communication and other working environments, the performance of the automobile airbag controller can be accurately tested to ensure its quality and reliability.

[0040] 5. The equipment is simple to operate, easy to use and can improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0042] Figure 2 It is a schematic diagram of the exploded structure of the integrated circuit structure of the utility model;

[0043] Figure 3 It is a schematic diagram of the planar structure of the integrated circuit structure of the utility model;

[0044] Figure 4 An integrated circuit diagram of the utility model;

[0045] Figure 5 This is a principle block diagram of the processing circuit board of the utility model;

[0046] Figure 6It is a circuit diagram of loop resistance simulation of the utility model;

[0047] Figure 7 This is the switch quantity simulation circuit diagram of the utility model.

[0048] In the figure: 100, upper shell; 200, integrated circuit structure; 300, bottom plate;

[0049] 1. Socket, 2. DC input socket, 3. Serial port socket, 4. TF card slot, 5. Normal power switch, 6. Instrument light ON switch, 7. Normal power status indicator, 8. Instrument ON power indicator, 9-1. DB9 female socket, 9-2. DB9 male socket, 10. Processing circuit board, 11. 3-speed 3-pin rocker switch, 12. Burning mode guide button, 13. Burning status indicator, 14. Lock switch external socket and switch, 15. CAN to USB circuit, 16. CAN circuit fixing bolt, 17. Spring retractable pin; 18. Switch and socket for internal and external sensor circuits; 19. K-line status indicator; 20. Reserved LED; 21. Application configuration mode indicator; 22. Status indicator and socket; 23. Status switch; 24. 6-way switch; 25. Digital tube voltmeter; 26A. Expansion circuit and lock switch socket; 26B. ACU basic pin socket. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] For examples, see Figure 1-7 The utility model provides a technical solution: a vehicle airbag controller 32 circuit diagnostic device, comprising: an upper shell 100, an integrated circuit structure 200 and a bottom plate 300, wherein the integrated circuit structure 200 is detachably embedded between the upper shell 100 and the bottom plate 300, and the integrated circuit structure 200 comprises:

[0052] The processing circuit board 10 is used to fix the devices and digital chip circuits of all circuit parts; each group of 3-speed 3-pin rocker switches 11 includes a switch, a two-color LED and a two-hole socket, which is used to simulate the switching, connection, state operation and indication of the ground, positive power supply and 2Ω states of 32 airbag circuits. The number of 3-speed 3-pin rocker switches 113-speed 3-pin rocker switches 11 is 32 groups, which are arranged at the bottom of the front of the processing circuit board 10; the burning mode guide button 12 is arranged at the bottom of the side of the processing circuit board 10; the burning status indicator light 13 is arranged on the side of the burning mode guide button 12 and is electrically connected to the burning mode guide button 12; the socket 1 is arranged at the upper left corner of the processing circuit board 10 for connecting Connect to a 12 or 24V DC power supply; the DC input socket 2 is arranged at the bottom of the socket 1, and is used to connect a mobile phone fast charging power bank or a charging head; the serial port socket 3 is arranged at the bottom of the DC input socket 2, and has an internal integrated RS232 to USB circuit; the TF card slot 4 is arranged on the side of the serial port socket 3, and is used to store the ACU program during offline burning; the normal power switch 5 is a 3-speed 6-pin rocker type, which is arranged on the side of the TF card slot 4, and is used to switch and shut down the DC power supply or power bank input; the instrument light ON switch 6 is a 2-speed 6-pin rocker type, which is arranged on the side of the normal power switch 5; the normal power status indicator light 7 is arranged on the side of the instrument light ON switch 6; the instrument ON power indicator light 8 is arranged on the side of the normal power status indicator light 7.

[0053] The automobile airbag controller 32 circuit diagnostic equipment also includes: DB9 female socket 9-1 and DB9 male socket 9-2, which are arranged on the side of the instrument ON power indicator light 8, the DB9 female socket 9-1 is used to connect to the OBD port of the vehicle body, and the DB9 male socket 9-2 is internally connected to the CAN bus and is reserved for the diagnostic equipment of the experimental institution.

[0054] The automobile airbag controller 32 circuit diagnostic equipment also includes: a CAN-to-USB circuit 15 is locked on the back of the processing circuit board 10 by a fixing bolt 16 of the CAN circuit; a spring retractable pin 17 is arranged on the outer wall of the CAN-to-USB circuit 15, and is used to connect the high and low pins and the terminal resistance pins of the CAN-to-USB circuit 15 to the processing circuit board 10; a switching switch and a socket 18 of the internal and external sensor circuits are arranged on the side of the CAN-to-USB circuit 15; a K-line status indicator 19 is arranged on the side of the switching switch and the socket 18 of the internal and external sensor circuits; a reserved LED 20 is arranged on the side of the K-line status indicator 19; an application configuration mode indicator 21 is arranged on the side of the reserved LED 20; a status The indicator light and socket 22 are arranged on the side of the application configuration mode indicator light 21, and are used for two-way collision output, WL, and PAD status indication; the status switching switch 23 is arranged on the side of the status indicator light and socket 22, and is used for two-way collision output, WL, and PAD status switching; the 6-way switch 24 is arranged on the side of the status switching switch 23, and is used for mode selection, deception reset, greater than 15V voltage handshake and the use of two-way CAN terminal resistance; the digital tube voltmeter 25 is arranged on the side of the 6-way switch 24, and is used to display the current handshake voltage; the ACU basic pin socket 26B is arranged on the side of the expansion circuit and lock switch socket 26A, including the 1st to 16th airbag circuits, the 1st to 10th lock switches, the 1st to 6th PSI5, CAN communication and other pins.

[0055] The automobile airbag controller 32 circuit diagnostic equipment also includes: an expansion circuit and lock switch socket 26A, which is arranged on the side of the digital tube voltmeter 25 and is used to connect the 17th to 32nd airbag circuits, the 11th to 20th lock switches and the 7th to 12th PSI5 communication pins.

[0056] ACU integrates multiple functions, can sample and analyze the vehicle's driving status in real time, and determine whether to deploy the airbag in the event of a collision. As the number of circuits increases, the internal complexity of the ACU increases, and supporting diagnostic and testing devices are required to ensure quality. The device of the utility model not only meets the requirements of environmental simulation testing, but also integrates multiple functions, can accurately locate the fault point and display it in real time, and can interact with the host computer to improve production efficiency.

[0057] More specific:

[0058] The processing circuit board 10 has a built-in CPU control unit, which is responsible for the coordination and scheduling of the input, output, communication, display, switch, and storage functions of the entire device;

[0059] The TYPEC multi-function power supply module consists of a protocol interface chip, a DC boost circuit, and a voltage regulator circuit to provide multiple voltages such as 5V, 12V, and 24V required for ACU testing, meeting the power supply and internal power supply required by ACUs of different voltage levels;

[0060] The display control module consists of an LCD screen, LED single-color and double-color indicators, and a digital tube meter. The LCD is responsible for displaying various operating parameters, switch selection, communication settings, circuit configuration, etc. The LED single-color and double-color indicators can intuitively display the power supply, 32-circuit switch status, and CAN, Kline communication and other working statuses; a digital tube voltmeter (used to display the current handshake voltage);

[0061] The communication module supports three interfaces: PYPEC, CAN and KLine to realize different communication functions, and realize the communication link and diagnosis between the ACU and the host computer. Among them, the TYPE-C serial port socket (internal integrated RS232 to USB circuit is used for KLine and host computer communication; CAN to USB circuit is used for CAN communication test; 9-1, DB9 female socket (internal CAN bus) is used to connect to the OBD port of the vehicle body; 9-2, DB9 male socket (internal CAN bus) is reserved for diagnostic equipment of experimental institutions;

[0062] The programming module consists of a burning mode guide button (self-reset type), a TF card slot, etc., to achieve offline burning (TF card stores ACU burning program);

[0063] Under the control of ACU, the relay module switches the circuit status and selection to test whether each circuit is open, short-circuited, and the resistance value meets the requirements;

[0064] The circuit configuration module includes 32 switches (3-position 3-pin rocker type) / two-color LED / two-hole socket, which are used to simulate the ground, positive power supply, 2Ω state connection, and state operation of 32 airbag circuits;

[0065] The interface module is composed of the ACU interface connector (including the 1st to 16th airbag circuits, the 1st to 10th lock switches, the 1st to 6th PSI5, CAN communication and other pins); completing the line connection with the ACU.

[0066] Working principle:

[0067] The utility model mainly simulates the working environment of ACU, such as the resistance value of the airbag detonation circuit, the communication of peripheral sensors, the resistance value of the seat belt detection circuit, access, disconnection, CAN communication, Kline communication and other working environments. Through different setting parameters, various performances of ACU are tested to meet the requirements of design and factory inspection.

[0068] like Figure 6As shown, loop resistance simulation: Each loop has an independent adjustment device, which consists of a three-speed toggle switch, relays, etc., and external terminals. The manual toggle switch can achieve the following functions through the control of the relay at different positions: external resistance access, short circuit and standard 2Ω built-in resistance access of the loop. When the ACU is connected through the connector, the loop accesses the preset resistance, or switches the resistance to complete the resistance change and simulate different vehicle conditions. The ACU built-in program completes the diagnosis of the loop, and takes corresponding measures such as alarming and notifying the superior controller. The 32 loops are adjusted independently of each other without interfering with each other, simulating the working conditions of the vehicle in different environments to the greatest extent.

[0069] like Figure 7 As shown, switch quantity simulation: 20-way switch quantity can simulate the different working conditions of Hall switch and general switch when connected to ACU, and realize the switching of 300Ω, 600Ω, open circuit and short circuit. The switch quantity simulation circuit is composed of a switch, an external interface and a built-in resistor. The multi-position switch is placed in different positions and cooperates with the internal circuit to complete the resistance change, simulate the working state of the ACU external circuit when it is actually connected, and the internal detection mechanism determines whether it is normal, realizing offline detection.

[0070] In order to connect the CAN interface of ACU with the host computer, the utility model has a built-in CAN to USB communication module, which is composed of TJA1044 and STM32F103C8T6. TJA1044 realizes CAN transmission and reception, STM32F103C8T6 realizes protocol conversion, and realizes USB communication connection with the host computer, avoiding the high cost and inconvenience of carrying caused by external CAN card. At the same time, communication chips and interfaces such as MAX232 and Kline are also designed internally to realize multiple connection methods and have good compatibility.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle airbag controller 32 circuit diagnostic equipment, characterized in that: include: An upper shell (100), an integrated circuit structure (200) and a bottom plate (300), wherein the integrated circuit structure (200) is detachably embedded between the upper shell (100) and the bottom plate (300), and the integrated circuit structure (200) comprises: A processing circuit board (10) is used to fix all circuit components and digital chip circuits; A three-position three-pin rocker switch (11), wherein the number of the three-position three-pin rocker switches (11) is 32 sets, and the three-position three-pin rocker switches (11) are arranged at the bottom end of the front side of the processing circuit board (10); A burning mode guide button (12) is arranged at the bottom end of the side of the processing circuit board (10); A burning status indicator light (13) is arranged on the side of the burning mode guide button (12) and is electrically connected to the burning mode guide button (12); A socket (1), arranged at the upper left corner of the processing circuit board (10), for connecting a 12V or 24V DC power supply; A DC input socket (2) is arranged at the bottom end of the socket (1) and is used to connect a mobile phone fast charging power bank or a charging head; A serial port socket (3), arranged at the bottom end of the DC input socket (2), and internally integrating an RS232 to USB circuit; A TF card slot (4), arranged on the side of the serial port socket (3), for storing the ACU program during offline burning; A normal power switch (5), the normal power switch (5) is a 3-speed 6-pin rocker type, arranged on the side of the TF card slot (4), and used to switch and shut down the DC power supply or power bank input; An instrument light ON switch (6), the instrument light ON switch (6) being a 2-speed 6-pin rocker arm type, and being arranged on the side of the normal power switch (5); A normal power status indicator light (7), which is arranged on the side of the instrument light ON switch (6); The instrument ON power indicator light (8) is arranged on the side of the normal power state indicator light (7).

2. The automotive airbag controller 32 circuit diagnostic device according to claim 1, characterized in that: The automobile airbag controller 32 circuit diagnostic equipment also includes: a DB9 female socket (9-1) and a DB9 male socket (9-2), which are arranged on the side of the instrument ON power indicator light (8), the DB9 female socket (9-1) is used to connect to the OBD port of the vehicle body, and the DB9 male socket (9-2) is internally connected to the CAN bus and is reserved for the diagnostic equipment of the experimental institution.

3. The automotive airbag controller 32 circuit diagnostic device according to claim 2, characterized in that: Each group of the three-stage three-pin rocker switches (11) comprises a switch, a two-color LED and a two-hole socket, and is used to simulate the switching, connection, state operation and indication of the ground, positive power supply and 2Ω states of 32 air bag circuits.

4. The automotive airbag controller 32 circuit diagnostic device according to claim 3, characterized in that: The automobile airbag controller 32 circuit diagnostic equipment also includes: A CAN-to-USB circuit (15) is fastened to the back of the processing circuit board (10) by means of a fixing bolt (16) of the CAN circuit; A spring-loaded retractable pin (17) is arranged on the outer wall of the CAN-to-USB circuit (15) and is used to connect the high and low pins and the terminal resistance pin of the CAN-to-USB circuit (15) to the processing circuit board (10); A switch and a socket (18) for the internal and external sensor circuits are arranged on the side of the CAN to USB circuit (15); A K-line status indicator light (19) is arranged on the side of the switch and the socket (18) of the internal and external sensor circuit; A reserved LED (20) is arranged on the side of the K-line status indicator light (19); An application configuration mode indicator light (21) is arranged on the side of the reserved LED (20); A status indicator light and a socket (22), arranged on the side of the application configuration mode indicator light (21), for two-way collision output, WL, PAD status indication; A status switching switch (23), arranged on the side of the status indicator light and the socket (22), for switching between two-way collision output, WL, and PAD status; A 6-way switch (24) is arranged on the side of the state switching switch (23) and is used for mode selection, deception reset, handshake with a voltage greater than 15V and use of two CAN terminal resistors; A digital tube voltmeter (25) is arranged on the side of the 6-way switch (24) and is used to display the current handshake voltage.

5. The automotive airbag controller 32 circuit diagnostic device according to claim 4, characterized in that: The automobile airbag controller 32 circuit diagnostic equipment also includes: An expansion circuit and lock switch socket (26A) is arranged on the side of the digital tube voltmeter (25) and is used to connect the 17th to 32nd air bag circuits, the 11th to 20th lock switches and the 7th to 12th PSI5 communication pins; The ACU basic pin socket (26B) is arranged on the side of the expansion circuit and the lock switch socket (26A), and includes the 1st to 16th airbag circuits, the 1st to 10th lock switches, the 1st to 6th PSI5, CAN communication and other pins.

6. The automotive airbag controller 32 circuit diagnostic device according to claim 5, characterized in that: The processing circuit board (10) has a built-in CPU control unit, which is responsible for the coordination and scheduling of the input, output, communication, display, switch and storage functions of the entire device.

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