Vehicle wiring harness detection system, method, device and storage medium

Abstract

The present invention relates to a vehicle wiring harness detection system, method, equipment and storage medium, comprising: a measurement system circuit board, the measurement system circuit board comprises a constant current source circuit, a measurement switch matrix, a sampling circuit, a measurement interface and a power supply interface, the constant current source circuit is sequentially communicated and connected with the measurement switch matrix and the sampling circuit to form a conductivity measurement loop, and the measurement switch matrix and the measurement interface are communicated and connected; the measurement interface is used to connect a wiring harness to be tested, and the power supply interface is used to connect the mains to the measurement system circuit board; the measurement system circuit board is used to output a stable current through the conductivity measurement loop to test the wiring harness to be tested when it is detected that the measurement interface is connected to the wiring harness to be tested and the power supply interface is connected to the mains; the embodiment of the present invention realizes high-precision constant current source detection of the wiring harness to be tested by constructing the measurement system circuit board, using the constant current source circuit and the measurement switch, does not require the wiring harness to carry its own voltage, and can quickly and accurately perform conductivity detection in different occasions.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle seats, and in particular to a vehicle wiring harness detection system, method, equipment and storage medium. Background Art

[0002] With the continuous advancement of intelligent electrification in the current automotive industry, the functions of the whole vehicle are increasing, which leads to more and more complex wiring harnesses, and an increasing number of wiring harness core points and wires. At the same time, in the production process of the wiring harness, the quality status of the wiring harness is extremely important, so the wiring harness will undergo a variety of factory inspections before leaving the factory: length, appearance, and electrical performance inspections to ensure the quality of the wiring harness.

[0003] Among them, the electrical performance test is mainly carried out on the electrical inspection table, which mainly measures and inspects the connection quality (conductivity) of the core points of the wiring harness.

[0004] However, in the related technology, the existing electrical testing station is relatively large in size, and its measurement principle is mainly the high and low level measurement of the microcontroller or the constant voltage measurement of the on-resistance. The high and low level measurement signals are easily interfered, and the constant voltage measurement resistance error is large. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the present invention provides a vehicle wiring harness detection system, method, device and storage medium.

[0006] According to a first aspect of an embodiment of the present invention, there is provided a vehicle harness detection system, measuring a system circuit board; The measurement system circuit board includes a constant current source circuit, a measurement switch matrix, a sampling circuit, a measurement interface and a power supply interface. The constant current source circuit is communicatively connected with the measurement switch matrix and the sampling circuit in sequence to form a conductivity measurement loop. The measurement switch matrix is ​​communicatively connected with the measurement interface. The measurement interface is used to connect the wiring harness to be tested, and the power interface is used to connect the mains power to the measurement system circuit board; The measurement system circuit board is used to test the wiring harness to be tested by outputting a stable current through the conductivity measurement loop when it is detected that the measurement interface is connected to the wiring harness to be tested and the power interface is connected to the mains.

[0007] Optionally, the vehicle wiring harness detection system further includes: an outer shell, an internal wiring, a measurement system circuit board, a display screen and a keyboard; the measurement system circuit board, the internal wiring and the display screen are arranged inside the outer shell.

[0008] Optionally, the measurement system circuit board is composed of an AC-to-DC conversion circuit, a DC-to-DC conversion circuit, a system power supply circuit, a flash memory storage circuit, a microcontroller, a signal conditioning circuit, a sampling circuit, a measurement switch matrix, a constant current source circuit, a measurement interface, a power supply interface and a universal serial bus interface.

[0009] Optionally, the system power supply circuit includes a first system power supply circuit and a second system power supply circuit, the first system power supply circuit and the second system power supply circuit are communicatively connected, the power supply interface is connected to the AC-DC conversion circuit, the AC-DC conversion circuit is respectively connected to the first system power supply circuit and the constant current source circuit through the DC-DC conversion circuit, the constant current source circuit is connected to the measurement switch matrix, the measurement interface is connected to the measurement switch matrix, the measurement switch matrix is ​​connected to the sampling circuit, the sampling circuit is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the second system power supply circuit, the second system power supply circuit is connected to the microcontroller, and the microcontroller is respectively connected to the flash memory storage circuit and the universal serial bus interface.

[0010] Optionally, the microcontroller is connected to the display screen via the internal cable, and the microcontroller is used to upload the test results to the display screen and display them on the display screen.

[0011] Optionally, the microcontroller is provided with an analog-to-digital converter, an internal universal serial bus interface, an internal serial peripheral interface communication interface and an internal universal asynchronous receiver-transmitter interface, the analog-to-digital converter is used to convert the measured analog signal into a digital signal, the internal universal serial bus interface is used to communicate with a keyboard, the internal serial peripheral interface communication interface is used to communicate with a flash memory storage chip in the flash memory storage circuit; the internal universal asynchronous receiver-transmitter interface is used to communicate with the display screen.

[0012] Optionally, the vehicle wiring harness detection system further includes: a keyboard; The keyboard is connected to the measurement system circuit board via a universal serial bus interface.

[0013] Optionally, the constant current source circuit is constructed by a preset three-terminal linear regulator, and the preset three-terminal linear regulator includes an input terminal, an output terminal and an adjustment terminal.

[0014] Optionally, the measurement switch matrix includes a multiplexer at the positive end and a multiplexer at the negative end, the common input or output of the multiplexers at the positive end are connected in parallel to the constant current source circuit, and the common input or output of the multiplexers at the negative end are connected in parallel to a sampling resistor.

[0015] According to a second aspect of an embodiment of the present invention, a vehicle wiring harness detection method is provided, which is applied to any vehicle wiring harness detection system described in the first aspect, and the method includes: When it is detected that the measuring interface is connected to the wiring harness to be tested and the power interface is connected to the mains, the mains is converted into a DC power supply by the AC-DC conversion circuit; Converting the DC power supply into a power supply via a DC to DC conversion circuit; Supplying power to the microcontroller via the system power circuit and the power supply; Acquire a voltage analog signal corresponding to both ends of a resistor in the sampling circuit through a conductivity measurement loop; Performing preset processing on the voltage analog signal through the signal conditioning circuit to generate a target voltage analog signal; Converting the target voltage analog signal into a target voltage digital signal through an analog-to-digital converter in the microcontroller; The target voltage digital signal is calculated by a microcontroller to obtain a test result, and the test result is stored in a flash memory storage circuit.

[0016] According to a third aspect of an embodiment of the present invention, there is provided an electronic device, including: processor; a memory for storing instructions executable by the processor; Wherein, the processor is configured to execute the instructions to implement the vehicle wiring harness detection method as described in the second aspect.

[0017] According to a fourth aspect of an embodiment of the present invention, a computer storage medium is provided. When instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal can execute the vehicle wiring harness detection method as described in the second aspect of the present invention.

[0018] The technical solution provided by the embodiments of the present invention may have the following beneficial effects: The vehicle harness detection system of the present invention includes a measurement system circuit board; the measurement system circuit board includes a constant current source circuit, a measurement switch matrix, a sampling circuit, a measurement interface and a power supply interface, the constant current source circuit is sequentially connected with the measurement switch matrix and the sampling circuit to form a conductivity measurement loop, and the measurement switch matrix and the measurement interface are connected in communication; the measurement interface is used to connect the harness to be tested, and the power supply interface is used to connect the mains to the measurement system circuit board; the measurement system circuit board is used to output a stable current to test the harness to be tested through the conductivity measurement loop when it is detected that the measurement interface is connected to the harness to be tested and the power supply interface is connected to the mains. The embodiment of the present invention realizes high-precision constant current source detection of the harness to be tested by constructing a measurement system circuit board, using the stable current output by the conductivity measurement loop composed of the constant current source circuit, the measurement switch matrix and the sampling circuit, and the measurement loop, without requiring the harness to carry its own voltage, realizing a small-volume, multi-channel portable universal automotive harness detection system, which can quickly and accurately perform conductivity detection in different occasions, and significantly improves detection efficiency and accuracy.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] Figure 1 is a schematic diagram of the system structure of a vehicle wiring harness detection system according to an exemplary embodiment; Figure 2 is a schematic diagram of an exemplary constant current source circuit according to an exemplary embodiment; Figure 3 is a flowchart of a vehicle wiring harness detection method according to an exemplary embodiment; Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0022] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0023] A first embodiment of the present invention relates to a vehicle wiring harness detection method. Figure 1 is a schematic diagram of a vehicle wiring harness detection system according to an exemplary embodiment. Figure 1 As shown, 1. The vehicle wiring harness detection system includes: a measurement system circuit board; The measurement system circuit board includes a constant current source circuit, a measurement switch matrix, a sampling circuit, a measurement interface and a power supply interface, and the constant current source circuit, the measurement switch matrix and the sampling circuit form a conductivity measurement loop; The measurement interface is used to connect the wiring harness to be tested, and the power interface is used to connect the mains power to the measurement system circuit board; The measurement system circuit board is used to test the wiring harness to be tested by outputting a stable current through the conductivity measurement loop when it is detected that the measurement interface is connected to the wiring harness to be tested and the power interface is connected to the mains.

[0024] Furthermore, the vehicle harness detection system further includes: a shell, an internal wiring and a display screen; the measurement system circuit board, the internal wiring and the display screen are arranged inside the shell.

[0025] Furthermore, the microcontroller is connected to the display screen via the internal cable, and the microcontroller is used to upload the test results to the display screen and display them on the display screen.

[0026] It should be noted that in the embodiments of the present application, reference is made to Figure 1 , it can be seen that Figure 1 The vehicle wiring harness detection system includes a measurement system circuit board, a display screen and a keyboard.

[0027] Wherein, the measurement system circuit board, the internal wiring and the display screen are arranged inside the housing.

[0028] Therefore, in the embodiment of the present application, the automobile wiring harness detection system is mainly composed of a shell, internal wiring, a measurement system circuit board, a display screen and a keyboard. The shell is the overall frame of the detection device, the measurement system circuit board, the internal wiring and the display screen are installed inside the shell, and the keyboard is an accessory. The core component of the detection device is the measurement system circuit board, which is composed of an AC-DC conversion circuit, a DC-DC conversion circuit, a system power supply circuit, a flash memory storage circuit, an analog-to-digital converter, a signal conditioning circuit, a sampling circuit, a channel switch matrix, a constant current source circuit, a measurement interface, a power supply interface, and a universal serial bus interface. The display screen and the measurement system circuit board are connected and communicated through internal wiring.

[0029] It should be noted that in the embodiment of the present application, the core of constructing a vehicle wiring harness detection system lies in the measurement system circuit board, wherein the measurement system circuit board is composed of an AC-DC conversion circuit, a DC-DC conversion circuit, a system power supply circuit, a flash memory storage circuit, a microcontroller, a signal conditioning circuit, a sampling circuit, a measurement switch matrix, a constant current source circuit, a measurement interface, a power supply interface and a universal serial bus interface.

[0030] Specifically, the AC-to-DC conversion circuit is an AC / DC circuit. The AC / DC circuit can choose to use an AC220V to DC12V switching power supply module or a self-built AC / DC circuit. Its main function is to convert the external 220V / 50Hz AC power into a DC12V power supply to power the subsequent system power circuit and display screen.

[0031] The DC / DC conversion circuit is a DC / DC circuit used to convert one DC voltage into another DC voltage to meet the needs of different electronic devices.

[0032] The flash memory circuit is a flash memory circuit.

[0033] Furthermore, the microcontroller is provided with an analog-to-digital converter, an internal universal serial bus interface, an internal serial peripheral interface communication interface and an internal universal asynchronous receiver-transmitter interface, the analog-to-digital converter is used to convert the measured analog signal into a digital signal, the internal universal serial bus interface is used to communicate with a keyboard, the internal serial peripheral interface communication interface is used to communicate with a flash memory storage chip in the flash memory storage circuit; the internal universal asynchronous receiver-transmitter interface is used to communicate with the display screen.

[0034] The microcontroller is an MCU, which can be a single-chip microcomputer with a built-in high-precision A / D converter, a USB (Universal Serial Bus) communication interface, an SPI (Serial Peripheral Interface) communication interface, and a UART (Universal Asynchronous Receiver / Transmitter) interface. The A / D converter is used to convert the measured analog signal, and the A / D converter is an analog-to-digital converter (ADC); the USB interface is used to connect and communicate with the keyboard of the human-computer interaction device; the SPI communication interface is used to communicate with the FLASH storage chip; and the UART interface is used to communicate with the display screen.

[0035] Furthermore, the constant current source circuit is constructed by a preset three-terminal linear regulator, and the preset three-terminal linear regulator includes an input terminal, an output terminal and an adjustment terminal.

[0036] The constant current source circuit can be an LDO constant current source circuit, which is constructed by using a preset three-terminal linear regulator, thereby ensuring a stable output current with relatively high accuracy and a relatively large load range, for example, a stable output current of 5mA.

[0037] The preset three-terminal linear regulator can be LM117H three-terminal linear regulator, refer to Figure 2 , it can be seen that the preset three-terminal linear regulator includes an input terminal, an output terminal and an adjustment terminal.

[0038] Specifically, the input terminal (Vin) is used to connect to an unregulated input power supply, wherein the input voltage must be higher than the output voltage by a certain preset value, such as 2-3V, to ensure that the voltage regulator works properly.

[0039] The output terminal (Vout) is used to provide a stable output voltage, which is set by an external resistor network.

[0040] The adjustment terminal (Adjust) is used to set the output voltage. The output voltage can be adjusted by connecting a resistor divider network to ground.

[0041] Furthermore, the measurement switch matrix includes a multiplexer at the positive end and a multiplexer at the negative end, the common input end or output end of the multiplexer at the positive end is connected in parallel to the constant current source circuit, and the common input end or output end of the multiplexer at the negative end is connected in parallel to the sampling resistor.

[0042] It should be noted that in the embodiment of the present application, the measurement switch matrix is ​​a measurement switch positive / negative matrix, which can be constructed by using a 64-to-1 multiplexer (analog switch) TP0164, wherein each multiplexer common input / output terminal is connected in parallel as a constant current source input terminal, and the 64 channels at the other end are connected to the core point of the measurement interface. The measurement switch matrix is ​​divided into positive and negative, and the multiplexer common input / output terminal at the positive end is connected in parallel to a 5mA constant current source, and the multiplexer common input / output terminal at the negative end is connected in parallel to a sampling resistor. The channel conduction and shutdown of the multiplexer are controlled by a single-chip microcomputer, so that arbitrary combination measurements between points can be realized.

[0043] The system power supply circuit uses an LDO three-terminal regulator to build an output 3.3V analog power supply and digital power supply to power the microcontroller and other chips. At the same time, it can also build a DC5V output power supply circuit as required to power some chips that require a DC5V power supply.

[0044] The signal conditioning circuit uses a programmable operational amplifier, which can select different signal amplification factors as needed. At the same time, the filter circuits of the input and output signals are added to the peripheral circuits of the programmable operational amplifier. While amplifying the measurement signal, it can filter out clutter as much as possible, reduce signal distortion, and improve signal stability and measurement accuracy.

[0045] The sampling circuit is a high-precision, fixed-resistance resistor connected in series in the measurement loop. The product of its resistance and the current output by the constant current source is no greater than the maximum conversion voltage of the single-chip A / D converter. The programmable operational amplifier in the signal conditioning circuit samples the voltage across the sampling resistor in each measurement, and then conditions and transmits it to the A / D converter built into the microcontroller.

[0046] The measurement interface is an external connection interface that realizes the physical electrical connection between the wiring harness to be tested and the test equipment, and can be selected according to actual needs.

[0047] Therefore, in the embodiment of the present application, the wiring harness to be tested is connected through the measurement interface, and when the power interface is connected to the mains, the wiring harness to be tested can be tested through the measurement system circuit board.

[0048] Furthermore, the system power circuit includes a first system power circuit and a second system power circuit, and the first system power circuit and the second system power circuit are communicatively connected.

[0049] Further, the power supply interface is connected to the AC-DC conversion circuit, the AC-DC conversion circuit is respectively connected to the first system power supply circuit and the constant current source circuit through the DC-DC conversion circuit, the constant current source circuit is connected to the measurement switch matrix, the measurement interface is connected to the measurement switch matrix, the measurement switch matrix is ​​connected to the sampling circuit, the sampling circuit is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the second system power supply circuit, the second system power supply circuit is connected to the microcontroller, and the microcontroller is respectively connected to the flash memory storage circuit and the universal serial bus interface.

[0050] Furthermore, the vehicle harness detection system further comprises: a keyboard; The keyboard is connected to the measurement system circuit board via a universal serial bus interface.

[0051] The vehicle wiring harness detection system of the present invention comprises: the vehicle wiring harness detection system comprises: a measurement system circuit board; the measurement system circuit board is composed of an AC-DC conversion circuit, a DC-DC conversion circuit, a system power supply circuit, a flash memory storage circuit, a microcontroller, a signal conditioning circuit, a sampling circuit, a measurement switch matrix, a constant current source circuit, a measurement interface, a power supply interface and a universal serial bus interface; the measurement interface is used to connect the wiring harness to be tested, and the power supply interface is used to connect the mains to the measurement system circuit board; the measurement system circuit board is used to test the wiring harness to be tested through the AC-DC conversion circuit, the DC-DC conversion circuit, the system power supply circuit, the flash memory storage circuit, the microcontroller, the signal conditioning circuit, the sampling circuit, the measurement switch matrix and the constant current source circuit when it is detected that the measurement interface is connected to the wiring harness to be tested and the power supply interface is connected to the mains. The embodiment of the present invention constructs a measurement system circuit board, utilizes a constant current source circuit and a measurement switch to implement high-precision constant current source detection of the wiring harness to be tested, does not require the wiring harness to have its own voltage, and implements a small-volume, multi-channel portable universal automotive wiring harness detection system. The system can quickly and accurately perform conductivity detection in different occasions, significantly improving detection efficiency and accuracy.

[0052] A second embodiment of the present invention relates to a vehicle wiring harness detection method. Figure 3 is a device block diagram of a vehicle wiring harness detection device according to an exemplary embodiment. Figure 3 As shown, the method includes: Step 101, when it is detected that the measurement interface is connected to the wiring harness to be tested and the power interface is connected to the mains, the mains is converted into a DC power supply by the AC-DC conversion circuit; Step 102, converting the DC power supply into a power supply through a DC-DC conversion circuit; Step 103, supplying power to the microcontroller through the system power circuit and the power supply; Step 104, obtaining a voltage analog signal corresponding to both ends of a resistor in the sampling circuit through a conductivity measurement loop; Step 105, performing preset processing on the voltage analog signal by the signal conditioning circuit to generate a target voltage analog signal; Step 106, converting the target voltage analog signal into a target voltage digital signal through an analog-to-digital converter in the microcontroller; Step 107, calculating the target voltage digital signal by a microcontroller to obtain a test result, and storing the test result in a flash memory storage circuit.

[0053] It should be noted that in the embodiment of the present application, the power interface is responsible for connecting the AC220V / 50Hz mains power to the AC-DC conversion circuit, the AC-DC conversion circuit converts the input mains power into a DC power supply, the DC-DC conversion circuit converts the DC power output by the AC / DC into the power supply required by some chips, and the system power supply circuit converts the DC-DC conversion circuit into the digital power supply and analog power supply required by each chip of the measurement system. The microcontroller is the data processing center of the entire measurement system. The constant current source circuit, the measurement switch positive / negative matrix, and the sampling circuit together form a conductivity measurement loop, and measure the voltage value at both ends of the sampling resistor in the sampling circuit. The voltage analog signal is amplified by the signal conditioning circuit, the clutter is filtered out, and the impedance is matched. After passing through the analog-to-digital converter, the analog signal is converted into a digital signal and input into the microcontroller. After a series of calculations, the microcontroller obtains the test results and stores them in the flash memory storage circuit. The microcontroller is connected to the display screen through an internal cable, and the microcontroller can upload the calculation results to the display screen for display. The keyboard is connected to the microcontroller through a universal serial bus interface, and information can be input into the microcontroller. The microcontroller can control the measurement switch positive / negative control matrix to realize the function of free combination measurement of each point.

[0054] The vehicle harness detection method of the present invention comprises: when it is detected that the measurement interface is connected to the harness to be tested and the power interface is connected to the mains, the mains is converted into a DC power supply through the AC-DC conversion circuit; the DC power supply is converted into a power supply through the DC-DC conversion circuit; the microcontroller is powered by the system power circuit and the power supply; the voltage analog signal corresponding to both ends of the resistor in the sampling circuit is obtained; the voltage analog signal is preset and processed by the signal conditioning circuit to generate a target voltage analog signal; the target voltage analog signal is converted into a target voltage digital signal through the analog-to-digital converter in the microcontroller; the target voltage digital signal is calculated by the microcontroller to obtain the test result, and the test result is stored in the flash memory storage circuit. The embodiment of the present invention realizes high-precision constant current source detection of the harness to be tested by constructing a measurement system circuit board, using a constant current source circuit and a measurement switch, and does not require the harness to carry its own voltage, thereby realizing a small-volume, multi-channel portable universal automotive harness detection system, which can quickly and accurately perform conductivity detection in different occasions, and significantly improves detection efficiency and accuracy.

[0055] A third embodiment of the present invention provides an electronic device, such as Figure 4 As shown, it includes a processor 501, a communication interface 502, a memory 503 and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504. Memory 503, used for storing computer programs; The processor 501, when used to execute the program stored in the memory 503, can implement the following steps: When it is detected that the measuring interface is connected to the wiring harness to be tested and the power interface is connected to the mains, the mains is converted into a DC power supply by the AC-DC conversion circuit; Converting the DC power supply into a power supply via a DC to DC conversion circuit; Supplying power to the microcontroller via the system power circuit and the power supply; Acquire a voltage analog signal corresponding to both ends of a resistor in the sampling circuit through a conductivity measurement loop; Performing preset processing on the voltage analog signal through the signal conditioning circuit to generate a target voltage analog signal; Converting the target voltage analog signal into a target voltage digital signal through an analog-to-digital converter in the microcontroller; The target voltage digital signal is calculated by a microcontroller to obtain a test result, and the test result is stored in a flash memory storage circuit.

[0056] The communication bus mentioned in the above terminal can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0057] The communication interface is used for communication between the above terminal and other devices.

[0058] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0059] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0060] A fourth embodiment of the present invention provides a computer storage medium, wherein the computer-readable storage medium stores instructions, and when the computer-readable storage medium is run on a computer, the computer executes the vehicle wiring harness detection method described in any one of the above embodiments.

[0061] A fifth embodiment of the present invention provides a vehicle, comprising the vehicle wire harness detection device according to the second embodiment of the present invention.

[0062] A sixth embodiment of the present invention provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute any of the vehicle wiring harness detection methods described in the above embodiments.

[0063] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, a computer, a server or a third database by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or third database. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a third database that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0064] It should be noted that, in this article, relational terms such as first and first are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0065] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0066] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A vehicle wiring harness detection system, characterized in that: The vehicle harness detection system comprises: a measurement system circuit board; The measurement system circuit board includes a constant current source circuit, a measurement switch matrix, a sampling circuit, a measurement interface and a power supply interface. The constant current source circuit is communicatively connected with the measurement switch matrix and the sampling circuit in sequence to form a conductivity measurement loop. The measurement switch matrix is ​​communicatively connected with the measurement interface. The measurement interface is used to connect the wiring harness to be tested, and the power interface is used to connect the mains power to the measurement system circuit board; The measurement system circuit board is used to test the wiring harness to be tested by outputting a stable current through the conductivity measurement loop when it is detected that the measurement interface is connected to the wiring harness to be tested and the power interface is connected to the mains.

2. The system according to claim 1, characterized in that The vehicle harness detection system further includes: a shell, an internal wiring and a display screen; the measurement system circuit board, the internal wiring and the display screen are arranged inside the shell.

3. The system according to claim 2, characterized in that The measurement system circuit board is composed of an AC-DC conversion circuit, a DC-DC conversion circuit, a system power supply circuit, a flash memory storage circuit, a microcontroller, a signal conditioning circuit, a sampling circuit, a measurement switch matrix, a constant current source circuit, a measurement interface, a power supply interface and a universal serial bus interface.

4. The system according to claim 3, characterized in that The system power supply circuit includes a first system power supply circuit and a second system power supply circuit, the first system power supply circuit and the second system power supply circuit are communicatively connected, the power supply interface is connected to the AC-DC conversion circuit, the AC-DC conversion circuit is respectively connected to the first system power supply circuit and the constant current source circuit through the DC-DC conversion circuit, the constant current source circuit is connected to the measurement switch matrix, the measurement interface is connected to the measurement switch matrix, the measurement switch matrix is ​​connected to the sampling circuit, the sampling circuit is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the second system power supply circuit, the second system power supply circuit is connected to the microcontroller, and the microcontroller is respectively connected to the flash memory storage circuit and the universal serial bus interface.

5. The system according to claim 3, characterized in that The microcontroller is connected to the display screen via the internal flat cable, and the microcontroller is used to upload the test results to the display screen and display them on the display screen.

6. The system according to claim 5, characterized in that The microcontroller is provided with an analog-to-digital converter, an internal universal serial bus interface, an internal serial peripheral interface communication interface and an internal universal asynchronous receiver-transmitter interface. The analog-to-digital converter is used to convert the measured analog signal into a digital signal. The internal universal serial bus interface is used to communicate with a keyboard. The internal serial peripheral interface communication interface is used to communicate with a flash memory storage chip in the flash memory storage circuit. The internal universal asynchronous receiver-transmitter interface is used to communicate with the display screen.

7. The system according to claim 2, characterized in that The vehicle harness detection system further includes: a keyboard; The keyboard is connected to the measurement system circuit board via a universal serial bus interface.

8. The system according to claim 1, characterized in that The constant current source circuit is constructed by a preset three-terminal linear regulator, and the preset three-terminal linear regulator includes an input terminal, an output terminal and an adjustment terminal.

9. The system according to claim 8, characterized in that The measurement switch matrix includes a multiplexer at the positive end and a multiplexer at the negative end. The common input or output of the multiplexers at the positive end is connected in parallel and connected to the constant current source circuit, and the common input or output of the multiplexers at the negative end is connected in parallel and connected to a sampling resistor.

10. A vehicle wiring harness detection method, characterized in that: Applied to the vehicle wiring harness detection system according to any one of claims 1 to 9, the method comprising: When it is detected that the measuring interface is connected to the wiring harness to be tested and the power interface is connected to the mains, the mains is converted into a DC power supply by an AC-DC conversion circuit; Converting the DC power supply into a power supply via a DC to DC conversion circuit; Supplying power to the microcontroller via the system power circuit and the power supply; Acquire a voltage analog signal corresponding to both ends of a resistor in the sampling circuit through a conductivity measurement loop; Performing preset processing on the voltage analog signal through the signal conditioning circuit to generate a target voltage analog signal; Converting the target voltage analog signal into a target voltage digital signal through an analog-to-digital converter in the microcontroller; The target voltage digital signal is calculated by a microcontroller to obtain a test result, and the test result is stored in a flash memory storage circuit.

11. An electronic device, characterized in that: include: at least one processor; a memory communicatively coupled to the at least one processor; The memory has a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the vehicle wire harness detection method described in claim 10 .

12. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the vehicle wiring harness detection method described in claim 10 is implemented.

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