Electrical comprehensive digital detection system for vehicle chassis

Abstract

The invention relates to the technical field of vehicle chassis electrical detection, and discloses a vehicle chassis electrical comprehensive digital detection system, which comprises a main control module, a test execution module, a data acquisition module, a fault positioning module, a state monitoring module and the like. The main control module analyzes the manual or automatic test instruction and drives the test execution module to operate; the data acquisition module acquires electrical parameters in real time and compares the electrical parameters with thresholds; the fault positioning module generates a fault path based on the dual-mode diagnosis logic; and the state monitoring module collects environment data and gives an early warning for abnormity. The system supports flexible expansion of hardware interfaces, field high reliability and multi-dimensional accurate diagnosis, and the detection efficiency and the maintenance capability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle chassis electrical detection, in particular to a vehicle chassis electrical comprehensive digital detection system. BACKGROUND

[0002] With the complication of modern vehicle electrical systems, the number and function of chassis electronic control units have significantly increased, and the demand for vehicle detection and maintenance has also increased. Vehicle chassis electrical systems involve multiple subsystems, including protection, integrated electrical systems, and chassis control, and their detection usually relies on multiple independent devices to complete.

[0003] In the prior art, detection devices are usually fixedly configured, and the hardware interface and test function are relatively fixed, making it difficult to meet the flexible needs of different vehicle models and task scenarios. In addition, the reliability of traditional detection systems in outdoor environments is low, and frequent plugging and unplugging can easily damage the interface, affecting the long-term use of the device. At the same time, the fault diagnosis method is relatively single, usually based on event logic or experience judgment, and lacks a multi-dimensional verification mechanism, which may result in inaccurate diagnosis results and thus prolong the repair time. The above problems to some extent limit the efficient detection and rapid maintenance capability of vehicle chassis electrical systems. SUMMARY

[0004] The purpose of the present application is to provide a vehicle chassis electrical comprehensive digital detection system, which aims to solve the problem of hardware interface and function fixation of vehicle chassis electrical system detection devices, low reliability in outdoor environments, and single fault diagnosis method leading to insufficient accuracy in the prior art.

[0005] The present application is implemented in this way. On the one hand, a vehicle chassis electrical comprehensive digital detection system comprises: a main control module for receiving and analyzing test instructions, the test instructions including at least manual test requests input through a human-computer interaction interface or automatic test requests received through a remote communication module; a test execution module for driving corresponding test units to run according to the test instructions, wherein manual test requests and automatic test requests correspond to different test modes respectively; a data acquisition module for acquiring electrical parameters of target subsystems in real time during testing, and comparing the electrical parameters with preset thresholds, and triggering an abnormality marker when detecting that a parameter exceeds the preset range; a fault location module for generating a fault path based on a dual-mode diagnosis logic if an abnormality marker is detected, and screening possible fault points in combination with test results, and finally outputting location information.

[0006] As a further scheme of the present application, the main control module specifically comprises: An interaction unit is configured to receive an operation instruction input by a user through a touch screen, the operation instruction including a manual selection of a test item or an adjustment of a test parameter. A communication unit is configured to receive a test task sent by a remote terminal through an Ethernet or a wireless local area network, the test task including a priority identifier. A task scheduling unit is configured to generate a test sequence according to the received operation instruction or test task and distribute the test sequence to a corresponding test unit.

[0007] As a further scheme of the present application, the manual test request and the automatic test request correspond to the same test procedure or different test procedures, respectively.

[0008] As a further scheme of the present application, the system further includes a state monitoring module, and the state monitoring module specifically includes: An environment monitoring unit is configured to collect, in real time, a temperature, a humidity and a vibration intensity of a current working environment, and compare collected data with a preset safety range. An early warning unit is configured to send an alarm information to a user terminal and suspend a current test task when detecting that an environmental parameter is out of the safety range.

[0009] As a further scheme of the present application, the environment monitoring unit is further configured to: acquire environmental data through a built-in sensor array, the sensor array including a temperature sensor, a humidity sensor and a three-axis accelerometer; extract a key characteristic value after filtering the collected environmental data, and perform a trend analysis on the key characteristic value and historical data; generate an environment state report and upload the environment state report to a cloud server through the communication unit when detecting an abnormal trend.

[0010] As a further scheme of the present application, the generation of the environment state report specifically includes: dividing the collected environmental data into a plurality of time windows, statistically analyzing data in each time window, and generating a statistical characteristic; matching the statistical characteristic with a preset model, and generating the environment state report when a matching degree reaches a set condition, the environment state report including a current environmental risk level and a recommended measure.

[0011] As a further scheme of the present application, the system further includes a resource management module, and the resource management module includes: A self-checking unit is configured to perform an initialization detection on each functional board card when the system is started, and record a detection result. A dynamic configuration unit is configured to update an available resource list according to the detection result, and shield a test item associated with a faulty resource.

[0012] As a further scheme of the present application, the self-checking unit is further used for: sending a self-checking command to each functional board card through the backplane controller, the self-checking command containing a test signal and a check code; receiving response data returned by the functional board card and checking the response data, and marking the board card as an unusable state when the checking fails; storing the self-checking result in a non-volatile memory and synchronizing to a remote terminal through a communication unit.

[0013] As a further scheme of the present application, the dynamic configuration unit is further used for: generating a resource mapping table according to the self-checking result, the resource mapping table containing state information and supported test types of each functional board card; when detecting that a certain functional board card is unusable, removing a test item associated with the board card from the resource mapping table and updating a test sequence.

[0014] As a further scheme of the present application, the master control module and the test execution module are connected through an Ethernet, and the Ethernet adopts a four-way CAN bus topology, each way of the CAN bus independently transmitting a different type of data stream.

[0015] As a further scheme of the present application, the test execution module includes an expandable functional board card group, the functional board card group containing an analog measurement board card, a discrete quantity I / O board card, a resistance simulation board card, a low-speed serial bus board card, a 1553B bus board card and a high-speed bus board card, each board card being connected with the backplane through an aviation socket supporting hot plug operation.

[0016] The present application provides a kind of vehicle chassis electrical comprehensive digital detection system, test instruction is received and parsed by master control module, drive test execution module runs, and real-time acquisition of electrical parameters is carried out in test process, when detecting abnormality, fault positioning module generates fault path. State monitoring module real-time acquisition of environmental data is carried out, and when exceeding safe range, alarm information is sent. Resource management module carries out self-checking to each functional board card when system starts, and dynamically updates available resource list according to self-checking result. Through the above design, flexible expansion of hardware interface, high reliability in field environment and accuracy of multi-dimensional fault diagnosis are realized, and the detection efficiency and maintenance capacity of vehicle chassis electrical system are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure diagram of the present application; Figure 2 is the internal structure diagram of the master control module of the present application; Figure 3 is the working flow chart of the state monitoring module of the present application; Figure 4 The resource management module self-checking and dynamic configuration flow chart of the application; Figure 5 The hardware architecture block diagram of the test execution module of the application; Figure 6 The four-way CAN bus topology structure block diagram of the application.

[0018] Among them, 1, master module; 2, test execution module; 3, data acquisition module; 4, fault positioning module; 5, interaction unit; 6, communication unit; 7, task scheduling unit; 8, state monitoring module; 9, environmental monitoring unit; 10, early warning unit; 11, resource management module; 12, self-checking unit; 13, dynamic configuration unit; 14, functional board card group; 15, backboard; 16, aviation socket. DETAILED DESCRIPTION

[0019] The technical solutions of the application will be described clearly and completely below in combination with the drawings of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0020] The application provides a vehicle chassis electrical comprehensive digital detection system, which is described below in combination with the drawings of the application Figure 1 to the drawings Figure 6 The specific embodiments of the application are described in detail. Figure 1 The overall structure block diagram of the application shows the connection relationship among the master module 1, the test execution module 2, the data acquisition module 3 and the fault positioning module 4. The master module 1 is connected with the test execution module 2 through Ethernet, the test execution module 2 contains a plurality of functional board card groups 14, and the functional board card groups 14 are connected with the backboard 15 through the aviation socket 16. The data acquisition module 3 is embedded in the test execution module 2, used for collecting the electrical parameters of the target subsystem in real time and transmitting the collected data to the master module 1 for processing. The fault positioning module 4 receives the instruction of the master module 1, generates the fault path based on the double-mode diagnosis logic and screens the possible fault points.

[0021] The internal structure of the master module 1 is shown in the figure Figure 2As shown, it includes an interaction unit 5, a communication unit 6 and a task scheduling unit 7. The interaction unit 5 receives user input operation instructions through the touch screen, which can be manual selection of test items or adjustment of test parameters. The communication unit 6 receives test tasks sent by remote terminals through Ethernet or wireless local area network, which contain priority identifiers. The task scheduling unit 7 generates test sequences according to the received operation instructions or test tasks and assigns them to corresponding test units. The four-way CAN bus topology is adopted for data transmission between the master control module 1 and the test execution module 2, as shown in Figure 6 As shown, each CAN bus independently transmits different types of data streams to ensure the efficiency and reliability of data transmission.

[0022] The hardware architecture of the test execution module 2 is shown in Figure 5 As shown, the core part is a functional board card group 14, which contains analog measurement board cards, discrete quantity I / O board cards, resistance simulation board cards, low-speed serial bus board cards, 1553B bus board cards and high-speed bus board cards. These functional board cards are connected with the backplane 15 through aviation sockets 16, which support hot plug operation for easy on-site maintenance and expansion. The functional board card group 14 runs the corresponding test process according to the test sequence assigned by the master control module 1. Manual test requests and automatic test requests correspond to the same test process or different test processes, which are dynamically adjusted by the task scheduling unit 7 according to test requirements.

[0023] The working process of the state monitoring module 8 is shown in Figure 3 As shown, it includes an environment monitoring unit 9 and a warning unit 10. The environment monitoring unit 9 obtains the temperature, humidity and vibration intensity of the current working environment through the built-in sensor array, which includes temperature sensors, humidity sensors and three-axis accelerometers. After filtering processing, the collected environmental data extracts key feature values and performs trend analysis with historical data. When the environmental parameters are detected to be outside the preset safety range, the warning unit 10 sends an alarm message to the user terminal and suspends the current test task. In addition, the environment monitoring unit 9 can also generate an environment status report. The report generation process includes dividing the collected environmental data into multiple time windows, statistically analyzing the data in each time window to generate statistical features, and matching the statistical features with the preset model. When the matching degree reaches the set condition, an environment status report containing the current environmental risk level and recommended measures is generated and uploaded to the cloud server through the communication unit 6.

[0024] The self-checking and dynamic configuration process of the resource management module 11 is shown in Figure 4As shown, it includes self-checking unit 12 and dynamic configuration unit 13. Self-checking unit 12 sends a self-checking command to each functional board through the backplane controller at system startup, which contains test signals and check codes. After the functional board returns the response data, self-checking unit 12 checks the response data, marks the board as unavailable when the check fails, and stores the self-checking result in the non-volatile memory, and synchronizes to the remote terminal through the communication unit 6. Dynamic configuration unit 13 generates a resource mapping table according to the self-checking result, which contains the state information and supported test types of each functional board. When detecting that a functional board is unavailable, dynamic configuration unit 13 removes the test items associated with the board from the resource mapping table and updates the test sequence to ensure rational use of system resources.

[0025] In actual application, taking the comprehensive detection of a general vehicle chassis electrical system as an example, first manually select the target subsystem to be detected through the touch screen of the interactive unit 5, such as the engine control unit or the brake system. Task scheduling unit 7 generates the corresponding test sequence and transmits it to test execution module 2 through Ethernet. Functional board group 14 in test execution module 2 runs the corresponding test process according to the test sequence, such as analog measurement board for collecting voltage signals of engine control unit, and discrete I / O board for detecting the switch state of brake system. Data acquisition module 3 acquires electrical parameters of the target subsystem in real time, and compares the collected data with the preset threshold. When detecting that a parameter exceeds the preset range, trigger the exception flag and transmit the related information to fault location module 4.

[0026] Fault location module 4 generates fault paths based on dual-mode diagnostic logic, the first mode is rule-based diagnostic logic, and the second mode is model-based diagnostic logic. The two modes combine test results to screen possible fault points and finally output location information. For example, when detecting that the voltage signal of the engine control unit is abnormal, fault location module 4 generates a fault path based on dual-mode diagnostic logic, and determines that the fault point is a sensor line short circuit by analyzing the related test data. At the same time, state monitoring module 8 acquires the temperature, humidity and vibration intensity of the current working environment in real time, and when detecting that the environmental parameters exceed the safety range, warning unit 10 sends alarm information to the user terminal and suspends the current test task, ensuring that the equipment can still maintain high reliability in harsh environments.

[0027] The resource management module 11 performs initialization detection on each functional board card at system startup, for example, after discovering that the calibration of an analog measurement board card fails, the self-checking unit 12 marks it as an unusable state, and synchronizes the self-checking result to the remote terminal through the communication unit 6. The dynamic configuration unit 13 updates the resource mapping table according to the self-checking result, masks the test items associated with the board card, and regenerates the test sequence, ensuring that the system can still complete other test tasks in the case of partial resource unavailability. In addition, since the aviation socket 16 supports hot plug operation, field maintenance personnel can replace the faulty board card without shutting down the system, further improving the maintainability of the system.

[0028] The operation of the entire system relies on efficient data transmission between the main control module 1 and the test execution module 2, which is achieved through a four-way CAN bus topology. Each CAN bus independently transmits different types of data streams, for example, one is used to transmit test instructions, and the other is used to transmit collected electrical parameter data. This design not only improves the efficiency of data transmission, but also enhances the anti-interference ability of the system, enabling it to run stably in complex field environments.

[0029] As can be seen from the above embodiments, the vehicle chassis electrical comprehensive digital detection system provided by the present application realizes flexible expansion of hardware interfaces, high reliability in field environments, and precision of multi-dimensional fault diagnosis. The system receives and analyzes test instructions through the main control module 1, drives the test execution module 2 to run, and collects electrical parameters in real time during testing, and triggers the fault positioning module 4 to generate a fault path when an anomaly is detected. The state monitoring module 8 collects environmental data in real time and sends an alarm message when it exceeds the safety range, and the resource management module 11 performs self-checking on each functional board card at system startup and dynamically updates the available resource list according to the self-checking result. Through reasonable connection relationship and cooperation mechanism among various modules, the detection efficiency and maintenance ability of the vehicle chassis electrical system are improved.

[0030] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vehicle chassis electrical integration digital detection system, characterized in that, Comprise: The main control module (1) is used for receiving and analyzing test instructions, including manual test request or automatic test request; Test execution module (2) is used for driving corresponding test unit operation according to the test instruction, wherein manual test request and automatic test request correspond to the same test procedure or different test procedure respectively; Data acquisition module (3) is used for acquiring electrical parameters of target subsystem in real time during test, and comparing the electrical parameters with preset threshold, when detecting that a parameter exceeds preset range, triggering abnormal mark; Fault location module (4) is used for generating fault path based on double mode diagnosis logic if abnormal mark is detected, and screening possible fault points combined with test results, finally outputting positioning information.

2. The digital detection system for electrical integration of vehicle chassis according to claim 1, characterized in that, The main control module (1) comprises: Interaction unit (5) is used for receiving user input operation instruction through touch screen, the operation instruction includes manual selection of test item or adjustment of test parameter; Communication unit (6) is used for receiving test task sent by remote terminal through Ethernet or wireless local area network, the test task contains priority identification; Task scheduling unit (7) is used for generating test sequence according to received operation instruction or test task, and distributing to corresponding test unit.

3. The digital detection system for vehicle chassis electrical integration according to claim 1, wherein, It also includes state monitoring module (8), the state monitoring module (8) comprises: Environment monitoring unit (9) is used for acquiring temperature, humidity and vibration intensity of current working environment through built-in sensor array, and comparing collected data with preset safety range; Early warning unit (10) is used for sending alarm information to user terminal when detecting that environmental parameter exceeds safety range, and suspending current test task.

4. The digital detection system for electrical integration of vehicle chassis according to claim 3, characterized in that, The environment monitoring unit (9) is also used for: Acquiring environmental data through built-in sensor array, the sensor array includes temperature sensor, humidity sensor and three axis accelerometer; After filtering the collected environmental data, the key characteristic value is extracted, and the trend analysis is carried out with the historical data; When detecting abnormal trend, generate environment state report and upload to cloud server through communication unit (6).

5. The digital detection system for vehicle chassis electrical integration according to claim 1, wherein, It also includes resource management module (11), the resource management module (11) comprises: Self-checking unit (12) is used for initializing detection of each function board when system starts, and recording detection results; Dynamic configuration unit (13) is used for updating available resource list according to detection results, and shielding test items associated with fault resources.

6. The digital detection system for electrical integration of a vehicle chassis according to claim 5, wherein, The self-checking unit (12) is also used for: Sending self-checking command to each function board through backplane controller, the self-checking command contains test signal and check code; Receive the response data returned by the function board, and check the response data, when the check fails, mark the board as unusable state; The self-checking result is stored in the nonvolatile memory, and is synchronized to the remote terminal through the communication unit (6).

7. The digital detection system for vehicle chassis electrical integration according to claim 1, wherein, The test execution module (2) comprises an extensible function card group (14), which contains analog measurement card, discrete quantity I / O card, resistance analog card, low-speed serial bus card, 1553B bus card and high-speed bus card, each card is connected with a backplane (15) through an aviation socket (16), and the aviation socket (16) supports hot plug operation.

8. The digital detection system for vehicle chassis electrical integration according to claim 1, wherein, The master control module (1) and the test execution module (2) are connected through an Ethernet, and the Ethernet adopts a four-way CAN bus topology structure, and each CAN bus independently transmits different types of data streams.

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