Vehicle fault diagnosis system based on SOA framework and NFC card key

Abstract

The invention relates to a vehicle fault diagnosis system based on an SOA framework and an NFC card key, belongs to the technical field of vehicle fault diagnosis, and solves the problems that an existing vehicle fault detection mode seriously depends on physical connection, operation is tedious and remote fault analysis cannot be achieved. The central processing unit summarizes the fault codes uploaded by the domain controllers and outputs a fault code writing request, and the wireless charging assembly responds to the fault code writing request and writes the fault codes summarized by the central processing unit into an internal storage sector of the NFC card key for storage. And when the fault code write-in soft switch key on the central control entertainment large screen is triggered, the central processing unit also outputs a fault code write-in request, the NFC card reader reads the fault code stored by the NFC card key, and the upper computer analyzes and interprets the fault code and generates and displays a vehicle fault diagnosis result. According to the invention, the remote detection of the fault code by the maintenance personnel can be realized, and the safety, convenience and efficiency of fault diagnosis are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle fault diagnosis, and particularly to a vehicle fault diagnosis system based on an SOA architecture and an NFC card key. Background Art

[0002] With the increasingly significant trend of the complexity of vehicle electronic and electrical architectures, complex electronic systems have posed severe challenges to vehicle fault diagnosis. The current mainstream fault diagnosis method requires connecting a diagnostic instrument or a bus analysis tool through an OBD diagnostic port. This method highly depends on physical connection, and maintenance personnel must operate on-site. If the vehicle cannot start or move due to severe faults (such as high-voltage battery faults, drive system failures), the diagnostic process will be forced to interrupt, and the vehicle needs to be towed to a repair point, which is not only time-consuming and laborious but also costly.

[0003] In the existing technology, troubleshooting complex faults requires collaborative analysis across domain controllers. Maintenance personnel need to connect to each controller successively to export logs. The single full-vehicle diagnosis takes a long time and has a high misjudgment rate. In remote areas or emergency situations, it also faces high time and economic costs. Therefore, there is an urgent need for a fault diagnosis solution that is disconnected from physical connections, supports offline secure transmission, and is adapted to multi-domain controller architectures to enable maintenance personnel to remotely troubleshoot vehicle faults and remotely detect vehicle fault codes, further improving the flexible scheduling of maintenance resources and the owner experience. Summary of the Invention

[0004] The purpose of the present invention is to provide a vehicle fault diagnosis system based on an SOA architecture and an NFC card key to solve the problems that the existing vehicle fault detection methods highly depend on physical connections, are cumbersome to operate, and cannot perform remote fault analysis.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A vehicle fault diagnosis system based on an SOA architecture and an NFC card key, the system includes:

[0007] Domain controllers based on the SOA architecture, used for controlling the working logic of each electrical assembly of the vehicle and performing fault detection when the vehicle power state is in the IGON mode. Each domain controller includes a power domain controller, a body domain controller, a cockpit domain controller, a chassis domain controller, and an intelligent driving domain controller, and the domain controllers are interconnected through an in-vehicle Ethernet bus. The communication between each domain controller and its managed subordinate electrical assemblies is through a CAN bus or a LIN bus;

[0008] A central processor connected to each domain controller through the in-vehicle Ethernet bus, used for receiving and summarizing the fault codes uploaded by each domain controller and outputting a write fault code request;

[0009] The wireless charging assembly of the actuator assembly controlled by the cockpit domain controller is used to respond to the write fault code request output by the central processor and write the fault codes summarized by the central processor into the internal storage sector of the NFC card key for storage;

[0010] The central control entertainment large screen installed on the vehicle center console is used to provide a soft switch button for writing fault codes. When the soft switch button for writing fault codes is triggered, the central processor outputs a write fault code request to the wireless charging assembly;

[0011] The NFC card reader deployed at the maintenance point is used to read the fault codes stored in the NFC card key and transmit the read fault codes to the host computer;

[0012] The host computer connected to the NFC card reader is used to analyze and interpret the received fault codes and generate and display the vehicle fault diagnosis results.

[0013] Further, the central processor packs the summarized fault codes and writes them into the NFC card key in the form of data packets through the wireless charging assembly for storage.

[0014] Further, after the NFC card reader reads the data packet in the NFC card key, the host computer automatically interprets the data packet according to the pre-stored fault design specifications.

[0015] Further, when the wireless charging assembly interacts with the NFC card key, an independent session key is generated for each data transmission, and the NFC card key is only allowed to be written through the wireless charging assembly and read through the NFC card reader.

[0016] Further, when the vehicle cannot move, the fault codes are written into the NFC card key by triggering the soft switch button for writing fault codes, and then the NFC card key is delivered to the maintenance point equipped with the NFC card reader and the host computer for remote fault analysis.

[0017] Further, after power-on, each domain controller performs self-check. When a fault is detected during the self-check, a standardized fault code is generated and stored in the memory of the domain controller, and at the same time, the fault code is also uploaded to the central processor in real time.

[0018] Further, when the domain controller performs self-check, the domain controller confirms the network bus with the corresponding electrical assembly for interaction. When the electrical assembly for interaction on the bus does not perform data transmission, the domain controller records and stores the lost fault code of the other party.

[0019] Further, when the domain controller performs self-check, it also performs functional fault detection on the electrical assembly for interaction.

[0020] Further, when the vehicle is a fuel vehicle, the electrical assemblies managed by the power domain controller include the engine control assembly and the transmission control assembly;

[0021] When the vehicle is a new energy vehicle, the electrical assemblies managed by the power domain controller include the vehicle control assembly, the battery system assembly, and the motor system assembly.

[0022] Further, the electrical assemblies managed by the body domain controller include the door control assembly, the headlight control assembly, the sunroof control assembly, the seat control assembly, the air conditioner control assembly, and the windshield wiper control assembly;

[0023] The electrical assemblies managed by the cockpit domain controller include the instrument assembly, the central control entertainment large screen assembly, the intelligent in-vehicle networking assembly, and the wireless charging assembly;

[0024] The electrical assemblies managed by the chassis domain controller include the vehicle stability system assembly and the steering assist system assembly;

[0025] The electrical assemblies managed by the intelligent driving domain controller include the front radar assembly, the rear radar assembly, the corner radar assembly, and the intelligent camera assembly.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) Safety: The vehicle fault diagnosis system of the present invention uses short-range wireless communication based on NFC technology to write the fault code into the NFC card key through the wireless charging assembly for storage, and the NFC card reader reads the fault code and cooperates with the upper computer for analysis and interpretation. It can not only realize the remote detection of the fault code by maintenance personnel, but also physically limit the intercepted range of the fault code information. Compared with the traditional radio frequency remote control key, the risk of remote relay attack is greatly reduced, thus avoiding the theft of the fault code and greatly improving the safety of vehicle fault diagnosis;

[0028] (2) Convenience: The vehicle fault diagnosis system of the present invention is equipped with a central control entertainment large screen, which can provide a soft switch button for writing the fault code. The vehicle owner can independently trigger the soft switch button for writing the fault code to write the fault code into the NFC card key with one key, and then hand over the NFC card key storing the fault code to the maintenance personnel for reading and parsing through the NFC card reader, i.e., the upper computer, to realize remote fault analysis. There is no need to connect to the vehicle OBD diagnostic port, which greatly saves the time for maintenance personnel to read and troubleshoot the fault code on site, and further improves the efficiency and convenience of vehicle fault diagnosis;

[0029] (3) Compatibility: In the vehicle fault diagnosis system of the present invention, each domain controller transmits fault codes to the central processor through the in-vehicle Ethernet bus. The central processor aggregates the fault codes uploaded by each domain controller and writes them into the NFC card key through the wireless charging assembly. It supports the cooperation of multiple domain controllers such as the power domain controller, body domain controller, cockpit domain controller, chassis domain controller, and intelligent driving domain controller, can adapt to complex electronic architecture models, has stronger compatibility, and provides technical support for efficient maintenance in the era of intelligent vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Structural schematic diagram of the vehicle fault diagnosis system described in the embodiment of the present invention;

[0032] Figure 2 Working flowchart of the vehicle fault diagnosis system described in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the technical problems, technical solutions, and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the drawings and specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0034] As Figure 1 shown, this embodiment provides a vehicle fault diagnosis system based on the SOA architecture and NFC card key. The vehicle fault diagnosis system includes various domain controllers based on the SOA architecture, specifically including a power domain controller, a body domain controller, a cockpit domain controller, a chassis domain controller, and an intelligent driving domain controller, etc. The vehicle fault diagnosis system also includes a central processor, a wireless charging assembly, a central control entertainment large screen (also known as the central entertainment control display terminal), an NFC card key, an NFC card reader, and a host computer.

[0035] In this embodiment, there are multiple electrical assemblies that interact under each domain controller. For example, for a fuel vehicle, the subordinate electrical assemblies managed by the power domain controller include the engine control assembly and the transmission control assembly; for a new energy vehicle, the subordinate electrical assemblies managed by the power domain controller include the vehicle control assembly, the battery system assembly, and the motor system assembly. Fuel vehicles and new energy vehicles can share the body domain controller, the cockpit domain controller, the chassis domain controller, and the intelligent driving domain controller. The subordinate electrical assemblies managed by the body domain controller include the door control assembly, the headlight control assembly, the sunroof control assembly, the seat control assembly, the air conditioning control assembly, and the windshield wiper control assembly; the subordinate electrical assemblies managed by the cockpit domain controller include the instrument assembly, the central control entertainment large screen assembly, the intelligent vehicle networking assembly, and the wireless charging assembly, where the intelligent vehicle networking assembly is the controller responsible for the vehicle network; the subordinate electrical assemblies managed by the chassis domain controller include the vehicle stability system assembly and the steering assist system assembly; the subordinate electrical assemblies managed by the intelligent driving domain controller include the front radar assembly, the rear radar assembly, the corner radar assembly, and the intelligent camera assembly.

[0036] The electrical assemblies are generally interconnected through the CAN bus or the LIN bus, and the domain controllers are interconnected through the in-vehicle Ethernet bus, so as to perform data transmission through network connection. The domain controllers communicate with the subordinate electrical assemblies they manage through the CAN bus or the LIN bus. The function of each domain controller is to control the working logic of the functions of various electrical assemblies of the vehicle and perform fault detection when the vehicle power state is in the IGON mode.

[0037] In the mode where the vehicle power state is IGON, if an electrical fault occurs in the vehicle, the corresponding domain controller will generate a fault code, and the domain controller can record and store the fault code it generates. All domain controllers of the vehicle are respectively connected to the central processor through the in-vehicle Ethernet bus and can transmit the fault code to the central processor for summarization. The central processor receives and summarizes the fault codes uploaded by each domain controller and outputs a corresponding write fault code request.

[0038] The vehicle power supply state being in the IGO N mode means that the relays on each power supply line are controlled by the ignition switch to close, so that each wire harness is normally powered on. When the vehicle power supply state is in the IGO N mode, after power-on, each domain controller first performs self-checks, including hardware self-checks and functional fault detections. During the hardware self-check process, the domain controller will confirm the network bus with the corresponding electrical assemblies for interaction. When there is no data transmission from the electrical assemblies interacting on the bus, the domain controller will record and store the lost fault codes of the other party. After performing functional fault detections, if a fault is detected (such as a wire harness open circuit or short circuit), corresponding fault codes will also be generated. All fault codes comply with the fault design specifications formed by the vehicle manufacturer during the vehicle design for each electrical assembly. Component suppliers will develop the corresponding fault code recording function into the corresponding electrical assemblies according to the fault design specifications. Therefore, the standard codes generated by the domain controller are standardized fault codes that comply with the fault design specifications. When each domain controller after power-on detects a fault during the self-check process, it generates standardized fault codes. While uploading the fault codes to the central processor in real time, it also stores the fault codes in the local memory of the domain controller.

[0039] In addition to implementing the general wireless charging function logic control, the wireless charging assembly can interact with the external NFC card key through the generated radio frequency field. For example, the frequency of the low-frequency signal generated by the wireless charging assembly is 13.56 MHz, and the NFC card key uses the same standard frequency as the wireless charging assembly. The communication protocol uses the industry standard protocols ISO14443A and ISO14443B. Specifically, the wireless charging assembly responds to the write fault code request output by the central processor and writes the fault codes summarized by the central processor into the internal storage sector of the NFC card key according to the NFC protocol for fault code storage. When the wireless charging assembly interacts with the NFC card key through the NFC protocol, an independent session key is generated for each data transmission to ensure that the fault codes cannot be cracked or tampered with during the transmission process. And the storage sector of the NFC card key is an independent encrypted partition, which only allows writing through the corresponding wireless charging assembly and reading through the NFC card reader.

[0040] The central control entertainment large screen is set on the vehicle's center console, and there is a soft switch button for writing fault codes on the central control entertainment large screen. The central processor packs the fault codes uploaded by each domain controller assembly. By clicking the soft switch button for writing fault codes on the central control entertainment large screen, it triggers the central processor to output a write fault code request to the wireless charging assembly. The wireless charging assembly responds to this write fault code request and writes the fault codes summarized by the central processor into the internal storage sector of the NFC card key for storage.

[0041] Further, the central processing unit packs the aggregated fault codes and writes them into the NFC card key for storage in the form of data packets through the wireless charging assembly, so as to achieve fast transmission of fault codes, reduce redundant information, and improve storage efficiency.

[0042] The NFC card reader is deployed at the maintenance point to read the fault codes stored in the NFC card key and transmit the read fault codes to the host computer.

[0043] The host computer is connected to the NFC card reader. After receiving the fault codes uploaded by the NFC card reader, the host computer analyzes and interprets the received fault codes according to the pre-stored fault design specifications. Specifically, it automatically matches the fault codes with the fault design specifications, and finally generates a visual vehicle fault diagnosis result according to the automatic matching result and displays the vehicle fault diagnosis result in real time, so as to assist the maintenance personnel in troubleshooting vehicle faults. Further, after the NFC card reader reads the data packet in the NFC card key, the host computer first splits the data packet and then automatically interprets the fault codes in the data packet according to the pre-stored fault design specifications.

[0044] When the vehicle cannot move, the vehicle owner or maintenance personnel can write the fault codes into the NFC card key by triggering the fault code writing soft switch button, and then deliver the NFC card key to the maintenance point equipped with the NFC card reader and the host computer for remote fault analysis, which is convenient and fast.

[0045] As Figure 2 shown, one of the working processes of the vehicle fault diagnosis system in this embodiment is as follows:

[0046] Step 1: The electrical architecture of the vehicle design and development is the SOA architecture. In the mode where the vehicle power state is IGO N, after an electrical fault occurs in the vehicle, the corresponding domain controller will generate fault codes;

[0047] Step 2: All domain controllers of the vehicle transmit the fault code data to the central processing unit through the in-vehicle Ethernet bus for aggregation;

[0048] Step 3: Add a fault code writing soft switch button on the central control entertainment large screen. After triggering the fault code writing soft switch button, write the fault codes collected by the central processing unit into the storage sector of the NFC card key through the writing function of the wireless charging assembly;

[0049] Step 4: The vehicle owner provides the NFC card key to the maintenance personnel. The maintenance personnel place the NFC card key on the NFC card reader connected to the host computer. The NFC card reader reads the fault codes in the NFC card key, and then the host computer automatically analyzes and interprets the read fault codes, and the vehicle fault diagnosis result is displayed on the host computer.

[0050] The application scenarios of the vehicle fault diagnosis system in this embodiment include:

[0051] 1. When the vehicle can still be driven but the vehicle fault light is on, the vehicle owner drives the vehicle to the repair shop. The repairman only needs to power on the vehicle and trigger the fault code writing soft switch button by operating the central control entertainment large screen to store the fault code into the NFC card key. The repairman can take the NFC card key to perform fault analysis on the upper computer in the office, without having to perform fault analysis in the vehicle all the time;

[0052] 2. When the vehicle cannot move due to a fault, the vehicle owner only needs to power on the vehicle and trigger the fault code writing soft switch button by operating the central control entertainment large screen to store the fault code into the NFC card key. Then the vehicle owner delivers the NFC card key to the repair shop, and fault analysis can be carried out in advance, improving the repair efficiency.

[0053] The vehicle fault diagnosis system based on the SOA architecture and NFC card key proposed by the present invention uses short-range wireless communication based on NFC to write the fault code into the NFC card key through the wireless charging assembly for storage, and the NFC card reader reads the fault code and cooperates with the upper computer for analysis and interpretation. It can not only realize the remote detection of the fault code by the repairman, but also physically limit the intercepted range of the fault code information. Compared with the traditional radio frequency remote control key (the communication distance can reach dozens of meters), the risk of remote relay attack is greatly reduced, thus avoiding the theft of the fault code and greatly improving the security of vehicle fault diagnosis. The vehicle fault diagnosis system of the present invention is equipped with a central control entertainment large screen, which can provide a fault code writing soft switch button. The vehicle owner can trigger the fault code writing soft switch button with one key to independently trigger the writing of the fault code into the NFC card key, and then hand over the NFC card key storing the fault code to the repairman for reading and parsing through the NFC card reader, that is, the upper computer, to realize remote fault analysis, without connecting to the vehicle OBD diagnostic port, greatly saving the time for the repairman to read and troubleshoot the fault code on site, and further improving the efficiency and convenience of vehicle fault diagnosis. In the vehicle fault diagnosis system of the present invention, each domain controller transmits the fault code to the central processor through the in-vehicle Ethernet bus. The central processor aggregates the fault codes uploaded by each domain controller and writes them into the NFC card key through the wireless charging assembly, supporting the cooperation of multiple domain controllers such as the power domain controller, body domain controller, cockpit domain controller, chassis domain controller, and intelligent driving domain controller, being able to adapt to complex electronic architecture models, with stronger compatibility, and providing technical support for efficient repair in the era of intelligent vehicles.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A vehicle fault diagnosis system based on the SOA architecture and NFC card keys, characterized in that, Including: Each domain controller based on the SOA architecture, which is used to control the working logic of each electrical assembly of the vehicle and perform fault detection when the vehicle power state is in the IGO N mode. Each domain controller includes a power domain controller, a body domain controller, a cockpit domain controller, a chassis domain controller, and an intelligent driving domain controller, and each domain controller is interconnected through an in-vehicle Ethernet bus. Each domain controller communicates with its subordinate electrical assemblies through a CAN bus or a LIN bus; A central processor connected to each domain controller through the in-vehicle Ethernet bus, which is used to receive and aggregate the fault codes uploaded by each domain controller and output a write fault code request; A wireless charging assembly serving as an actuator assembly controlled by the cockpit domain controller, which is used to respond to the write fault code request output by the central processor and write the fault codes aggregated by the central processor into the internal storage sector of the NFC card key for storage; A central control entertainment large screen provided on the vehicle center console, which is used to provide a fault code write soft switch button. When the fault code write soft switch button is triggered, the central processor outputs a write fault code request to the wireless charging assembly; An NFC card reader deployed at the maintenance point, which is used to read the fault codes stored in the NFC card key and transmit the read fault codes to the host computer; A host computer connected to the NFC card reader, which is used to analyze and interpret the received fault codes and generate and display the vehicle fault diagnosis result.

2. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to claim 1, characterized in that, The central processor packages the aggregated fault codes and writes them into the NFC card key in the form of data packets through the wireless charging assembly for storage.

3. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to claim 2, wherein, After the NFC card reader reads the data packet in the NFC card key, the host computer automatically interprets the data packet according to the pre-stored fault design specifications.

4. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to any one of claims 1 to 3, characterized in that, When the wireless charging assembly interacts with the NFC card key, an independent session key is generated for each data transmission, and the NFC card key is only allowed to be written through the wireless charging assembly and read through the NFC card reader.

5. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to any one of claims 1 to 3, characterized in that, When the vehicle cannot move, the fault codes are written into the NFC card key by triggering the fault code write soft switch button, and then the NFC card key is delivered to the maintenance point equipped with the NFC card reader and the host computer for remote fault analysis.

6. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to any one of claims 1 to 3, characterized in that, Each domain controller after power-on performs self-check. When a fault is detected during the self-check, a standardized fault code is generated and stored in the memory of the domain controller, and at the same time, the fault code is also uploaded to the central processor in real time.

7. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to claim 6, wherein, When the domain controller performs self-check, the domain controller confirms the network bus with the corresponding electrical assembly for interaction. When the electrical assembly for interaction on the bus does not perform data transmission, the domain controller records and stores the lost fault code of the other party.

8. The vehicle fault diagnosis system based on the SOA architecture and NFC card key according to claim 6, wherein When the domain controller performs self-check, it also performs functional fault detection on the electrical assembly for interaction.

9. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to any one of claims 1 to 3, characterized in that, When the vehicle is a fuel vehicle, the subordinate electrical assemblies managed by the power domain controller include an engine control assembly and a transmission control assembly; When the vehicle is a new energy vehicle, the subordinate electrical assemblies managed by the power domain controller include a vehicle control assembly, a battery system assembly, and a motor system assembly.

10. The vehicle fault diagnosis system based on the SOA architecture and the NFC card key according to any one of claims 1 to 3, characterized in that, The subordinate electrical assemblies managed by the body domain controller include the door control assembly, headlight control assembly, sunroof control assembly, seat control assembly, air conditioning control assembly, and windshield wiper control assembly; The subordinate electrical assemblies managed by the cockpit domain controller include the instrument assembly, central control entertainment large screen assembly, intelligent vehicle networking assembly, and wireless charging assembly; The subordinate electrical assemblies managed by the chassis domain controller include the vehicle stability system assembly and the steering assist system assembly; The subordinate electrical assemblies managed by the intelligent driving domain controller include the front radar assembly, rear radar assembly, corner radar assembly, and intelligent camera assembly.

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