Reset performance test system and test method for sudden voltage change of vehicle and controller

Abstract

The invention discloses a reset performance test system and test method for vehicle voltage sudden change and a controller. The test system comprises an upper computer used for sending a program control instruction, the program control instruction is used for generating a control curve indicating voltage waveform change, and the upper computer is further used for comparing and analyzing an electric signal and generating an analysis result; the programmable power supply is connected with the whole vehicle wire harness, and the programmable power supply is used for outputting an abnormal working voltage corresponding to the control curve indicating the waveform change of the voltage in response to the programmable instruction; the acquisition module is used for acquiring an electric signal of the vehicle; transmitting the collected electric signal of the vehicle to an upper computer; and the report generation module is used for generating a corresponding key value pair according to the analysis result, and generating a reset performance test result of the sudden change of the vehicle voltage according to the key value pair. According to the invention, the automation degree of the reset performance test of the sudden voltage change of the vehicle and the accuracy of the test result can be improved, and the accuracy of the whole vehicle state test result can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle detection technology, and in particular to a vehicle voltage sudden change reset performance test system, test method and controller. Background Art

[0002] As the number of parts inside the vehicle, such as electronic and electrical sensors, controllers, and actuators, increases, the load of the vehicle's power system will change greatly under conditions such as sudden acceleration, deceleration, and emergency braking during driving, and the voltage at the battery end will rise or fall suddenly. At this time, it is particularly important whether the vehicle's electronic control components can work normally.

[0003] In the related technology, it is usually determined whether the electronic control components of the whole vehicle can operate normally by providing a disturbance operation to the power supply and then monitoring the reset of the power supply voltage. At present, most of the disturbance operations provided to the power supply are performed through manual switching operations, mainly by manually changing the voltage applied to the power supply to provide quantitative support for the disturbance of the power supply. It is also necessary to manually monitor the reset of the power supply voltage to determine whether the electronic control components can operate normally. However, this test method makes the degree of automation of the disturbance operation low, and the accuracy of the reset performance test results of the sudden change of vehicle voltage is low, and it is difficult to reproduce the relevant working conditions of the whole vehicle. In this process, in the face of complex vehicle testing scenarios, it is also necessary to monitor the message status of multiple functions of the whole vehicle to evaluate the vehicle status. Relying solely on manual recording makes the detection efficiency low and the accuracy of the vehicle status test results is low. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application embodiment provides a vehicle voltage sudden change reset performance test system, test method and controller, which is conducive to improving the automation degree of the vehicle voltage sudden change reset performance test and the accuracy of the test results, while improving the accuracy of the vehicle whole vehicle status test results.

[0005] In a first aspect, an embodiment of the present application provides a vehicle voltage sudden change reset performance test system, comprising:

[0006] A host computer, used to send program control instructions, wherein the program control instructions are used to generate a control curve indicating a change in a voltage waveform, and the host computer is also used to compare and analyze the electrical signals to generate analysis results;

[0007] A programmable power supply, the programmable power supply is connected to the vehicle wiring harness, and the programmable power supply is used to respond to the programmable instruction and output an abnormal working voltage corresponding to the control curve indicating the change of the voltage waveform;

[0008] A collection module, wherein the input end of the collection module is connected to the data transmission interface of the vehicle to collect the electrical signal of the vehicle; the output end of the collection module is connected to the host computer through a local area network to transmit the collected electrical signal of the vehicle to the host computer;

[0009] The report generation module is used to generate corresponding key-value pairs according to the analysis results, and to generate reset performance test results of vehicle voltage sudden change according to the key-value pairs.

[0010] According to some embodiments of the present application, a shaft-coupled dynamometer is also included, and the shaft-coupled dynamometer is used to simulate wheel torque and rotation speed to achieve simulation of real vehicle driving conditions.

[0011] According to some embodiments of the present application, a projector is further included, and the projector is communicatively connected to the host computer. The projector is used to load the scene video stored in the host computer and project the scene video onto a panoramic screen with a preset angle.

[0012] According to some embodiments of the present application, a vehicle sensing module and an injection module are further included. The injection module is communicatively connected to the host computer, and the injection module is used to inject the scene video stored in the host computer into the vehicle sensing module through a video injection method or a bus injection method.

[0013] According to some embodiments of the present application, a radar sensor and an inertial measurement unit are also included, and the injection module is used to inject radar data detected by the radar sensor into the vehicle sensor module through bus injection; the injection module is also used to inject the inertial signal detected by the inertial measurement unit into the vehicle sensor module through voltage channel protocol simulation or bus injection.

[0014] According to some embodiments of the present application, a temperature environment chamber is also included, and the temperature environment chamber is used to provide different preset temperature environments to place the vehicle in different temperature environment working conditions.

[0015] According to some embodiments of the present application, the acquisition module includes a current acquisition module and a voltage acquisition module, the current acquisition module and the programmable power supply are connected in series, the positive pole of the current acquisition module is connected to the negative pole of the vehicle wiring harness, the negative pole of the current acquisition module is connected to the negative pole of the programmable power supply, the positive pole of the programmable power supply is connected to the positive pole of the vehicle wiring harness, and the voltage acquisition module and the programmable power supply are connected in parallel.

[0016] In a second aspect, an embodiment of the present application provides a method for testing the reset performance of a vehicle voltage sudden change, which is applied to the reset performance testing system of a vehicle voltage sudden change as described in the technical solution of the first aspect, including:

[0017] Sending a program control instruction, wherein the program control instruction is used to generate a control curve indicating a change in a voltage waveform;

[0018] In response to the program control instruction, outputting an abnormal operating voltage corresponding to the control curve indicating a change in the voltage waveform;

[0019] Collecting electrical signals from the vehicle and transmitting the electrical signals from the vehicle to a host computer;

[0020] Performing comparative analysis on the electrical signals and generating analysis results;

[0021] A corresponding key-value pair is generated according to the analysis result, and a reset performance test result of a vehicle voltage sudden change is generated according to the key-value pair.

[0022] According to some embodiments of the present application, the acquisition module includes a current acquisition module, a voltage acquisition module, and a CAN signal acquisition interface, and the acquisition of the vehicle's electrical signal and the transmission of the vehicle's electrical signal to the host computer include:

[0023] Responsive to a collection instruction of an electrical signal from a vehicle;

[0024] Collecting the static current signal of the vehicle through the current acquisition module;

[0025] The voltage acquisition module is used to collect the vehicle road terminal voltage signal;

[0026] Collect network management messages through the CAN signal acquisition interface;

[0027] The vehicle static current signal, the vehicle road terminal voltage signal and the network management message are converted into a preset format and transmitted to a host computer.

[0028] According to some embodiments of the present application, the comparative analysis of the electrical signal and generating the analysis result includes:

[0029] Comparing the vehicle road terminal voltage signal collected by the voltage collection module with the voltage of the control curve indicating the voltage waveform change, and determining whether there is a message error frame of the vehicle road terminal voltage signal;

[0030] The message error frames of the vehicle road terminal voltage signal are sorted, and an analysis result based on abnormal time-abnormal message is generated.

[0031] According to some embodiments of the present application, in response to a function test instruction, each function in the function test sequence table is sequentially detected according to the function test sequence table to determine whether the function is operating normally;

[0032] When a function abnormality is detected, the current function is marked as abnormal and a current function abnormality message is output;

[0033] When it is detected that the function is normal, a detection pass message is sent and the next function detection is performed.

[0034] In a third aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method described in the technical solution of the second aspect above when running the computer program.

[0035] The vehicle voltage sudden change reset performance test system, test method and controller provided by the technical solution of the present application have at least one of the following advantages or beneficial effects: the programmable power supply responds to the programmable instruction sent by the host computer, outputs an abnormal working voltage corresponding to the control curve indicating the voltage waveform change, and applies the abnormal working voltage to the wiring harness of the whole vehicle, and uses the programmable power supply to provide quantitative programmable hardware support for the vehicle power supply voltage disturbance, so as to realize the curve input disturbance vehicle power supply voltage. Compared with the traditional method of providing vehicle power supply voltage disturbance by manually changing the vehicle power supply voltage, the curve input disturbance vehicle power supply voltage of the present application improves the automation degree of the vehicle voltage sudden change reset performance test, saves labor costs, and improves the accuracy of vehicle voltage sudden change control. The acquisition module is used to collect the vehicle's electrical signals output by the vehicle's data transmission interface, and transmit the collected vehicle's electrical signals to the host computer; the host computer collects, compares and analyzes the electrical signals to determine the accuracy of the test input conditions and generates analysis results; the report generation module generates the corresponding abnormal time-abnormal message key-value pairs according to the analysis results output by the host computer, and compares the abnormal time-abnormal message key-value pairs with the preset functional index qualified table to determine whether the vehicle power supply voltage is normal under long-term abnormal voltage interference, and generates the vehicle voltage sudden change reset performance test results. By analyzing and comparing the electrical signals by the host computer and comparing the key-value pairs with the preset functional index qualified table through the report generation module to determine whether the various functions of the vehicle are normal, the accuracy of the test results of the vehicle voltage sudden change reset performance test can be improved, and the accuracy of the vehicle status test results can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a vehicle voltage sudden change reset performance test system provided in an embodiment of the present application;

[0037] Figure 2 It is a structural schematic diagram of another vehicle voltage sudden change reset performance test system provided in an embodiment of the present application;

[0038] Figure 3 It is a connection relationship diagram of a programmable power supply provided in an embodiment of the present application;

[0039] Figure 4 It is a flow chart of a method for testing the reset performance of a vehicle voltage sudden change provided by an embodiment of the present application;

[0040] Figure 5 It is a flow chart of a method for collecting an electrical signal of a vehicle and transmitting the electrical signal of the vehicle to a host computer provided in an embodiment of the present application;

[0041] Figure 6 is a flow chart of a method for comparatively analyzing electrical signals and generating analysis results provided by an embodiment of the present application;

[0042] Figure 7 is a flow chart of a vehicle function testing method provided by an embodiment of the present application;

[0043] Figure 8 It is a control curve diagram indicating voltage waveform change provided in an embodiment of the present application;

[0044] Fig. 9 It is a structural diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0046] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0048] Reference Figure 1 As shown, Figure 1 It is a structural schematic diagram of a vehicle voltage sudden change reset performance test system provided by an embodiment of the present application. The vehicle voltage sudden change reset performance test system includes a host computer, a programmable power supply, an acquisition module and a report generation module. The host computer and the programmable power supply are communicatively connected. The host computer is used to send programmable instructions. The programmable instructions are used to generate a control curve indicating a voltage waveform change. The programmable power supply is connected to a vehicle wiring harness. The programmable power supply is used to respond to the programmable instructions, output an abnormal working voltage corresponding to the control curve indicating a voltage waveform change, and apply the abnormal working voltage to the vehicle wiring harness; the input end of the acquisition module is connected to the data transmission interface of the vehicle to acquire the vehicle's electrical signal; the output end of the acquisition module is connected to the host computer through a local area network to transmit the acquired vehicle's electrical signal to the host computer; the host computer is also used to compare and analyze the electrical signal to generate an analysis result; the report generation module is used to generate a corresponding key-value pair according to the analysis result, and generate a vehicle voltage sudden change reset performance test result according to the key-value pair.

[0049] In some embodiments of the present application, the programmable power supply is a four-quadrant programmable power supply, which is used to replace the vehicle battery. The four-quadrant programmable power supply responds to the programmable instructions sent by the host computer, outputs an abnormal operating voltage corresponding to the control curve indicating the change in the voltage waveform, and applies the abnormal operating voltage to the wiring harness of the vehicle. The four-quadrant programmable power supply is used to provide quantitative programmable hardware support for the vehicle power supply voltage disturbance, thereby realizing the curved input disturbance vehicle power supply voltage. Compared with the traditional method of providing vehicle power supply voltage disturbance by manually changing the vehicle power supply voltage, the curved input disturbance vehicle power supply voltage of the present application improves the degree of automation of the reset performance test of the vehicle voltage sudden change, saves labor costs, and improves the accuracy of the vehicle voltage sudden change control. The acquisition module is used to collect the vehicle's electrical signals output by the vehicle's data transmission interface, and transmit the collected vehicle's electrical signals to the host computer; the host computer collects, compares and analyzes the electrical signals to determine the accuracy of the test input conditions and generates analysis results; the report generation module generates the corresponding abnormal time-abnormal message key-value pairs according to the analysis results output by the host computer, and compares the abnormal time-abnormal message key-value pairs with the preset functional index qualified table to determine whether the vehicle power supply voltage is normal under long-term abnormal voltage interference, and generates the vehicle voltage sudden change reset performance test results. By analyzing and comparing the electrical signals by the host computer and comparing the key-value pairs with the preset functional index qualified table through the report generation module to determine whether the various functions of the vehicle are normal, and then generating the vehicle voltage sudden change reset performance test results, the accuracy of the vehicle voltage sudden change reset performance test results can be improved, while improving the accuracy of the vehicle vehicle status test results.

[0050] It can be understood that the four-quadrant programmable power supply is a power supply device that can provide not only forward voltage and current, but also reverse voltage and current, thereby achieving operation in the four quadrants of voltage and current. This power supply is widely used in battery testing, motor control, automotive electronics and other fields, and can simulate complex working conditions and load changes.

[0051] The host computer sends a program control instruction, which is used to generate a control curve indicating the change of the voltage waveform. The host computer completes the long-term overvoltage working voltage control work by sending the program control instruction to the program control power supply. It should be noted that the format of the program control instruction is not fixed. The control curve indicating the change of the voltage waveform corresponding to the program control instruction includes the limiting current, set voltage, maintenance time information, etc. After receiving the program control instruction, the program control power supply outputs the abnormal working voltage corresponding to the control curve indicating the change of the voltage waveform, realizing the curve input disturbance vehicle power supply voltage.

[0052] In some embodiments of the present application, the host computer includes a computer and / or a computer cloud platform, and the computer and the computer cloud platform are connected in communication. When the vehicle needs to test more functions, the amount of data of the vehicle's electrical signal collected by the acquisition module through the vehicle's data transmission interface is also large. At this time, the host computer adopts the type of computer and computer cloud platform, and the computer can upload the collected electrical signals of part of the vehicle to the computer cloud platform, and compare and analyze and calculate the electrical signals of part of the vehicle through the computer cloud platform to generate analysis results, and then the computer cloud platform transmits the analysis results back to the computer. By setting up a computer cloud platform, the computing task of the computer can be shared, and the efficiency of the host computer's comparative analysis of electrical signals can be improved. At the same time, the phenomenon of data redundancy or data misalignment caused by the excessive computing task of the computer can be avoided, and the accuracy of the comparative analysis results of the electrical signals by the host computer can be improved.

[0053] In some embodiments of the present application, the vehicle voltage sudden change reset performance testing system also includes a shaft-coupled dynamometer, which is used to simulate wheel torque and speed to achieve a simulation of the vehicle's actual driving conditions.

[0054] The vehicle is installed on the shaft-coupled dynamometer, and the shaft-coupled dynamometer is connected to the simulation system. The simulation system outputs the preset wheel torque and speed to the data transmission interface of the shaft-coupled dynamometer. The coupled dynamometer simulates the vehicle wheel torque and speed with the preset wheel torque and speed output by the simulation system to simulate the real driving conditions of the vehicle, thereby analyzing the dynamic performance of the vehicle. The shaft-coupled dynamometer can be designed to be movable. The shaft-coupled dynamometer adjusts the wheelbase and wheelbase according to the type of vehicle to achieve fast and efficient vehicle installation and commissioning. The direct coupling connection between the shaft end of the shaft-coupled dynamometer and the vehicle avoids the influencing factors of the coupling, tire heating, and different tire pressures, greatly improving the accuracy, sensitivity, and consistency of the vehicle's low voltage sudden reset performance test and various vehicle function tests.

[0055] In some embodiments of the present application, the vehicle voltage sudden change reset performance test system also includes a projector, which is communicatively connected to a host computer. The projector is used to load the scene video stored in the host computer and project the scene video onto a surround-view screen at a preset angle.

[0056] The host computer sends a program-controlled instruction to the four-quadrant program-controlled power supply, and the four-quadrant program-controlled power supply outputs the abnormal working voltage corresponding to the control curve indicating the change of the voltage waveform to change the power supply voltage value of the vehicle. The acquisition module collects the electrical signal of the vehicle and transmits it to the host computer for comparative analysis to generate the analysis results. The report generation module generates the reset performance test results of the sudden change of the vehicle voltage according to the analysis results. At the same time, the various functions of the whole vehicle are tested, the host computer is connected to the projector, the projector is turned on and adjusted to the correct input signal source so as to detect the signal from the host computer, and the output resolution of the host computer is set according to the resolution of the projector to ensure the video clarity. Then, the projector loads the scene video stored in the host computer and projects the scene video on the 220° surround screen through the projector; the projector loading the scene video in the host computer is a multimedia display method, and the scene video stored in the host computer is displayed through the projector to further simulate the real driving conditions of the vehicle, and at the same time can enhance the driver's driving perception and avoid driving dizziness.

[0057] It is worth noting that it is necessary to ensure that the video format of the scene video in the host computer is compatible with the projector. The video format of the scene video in the host computer can be MP4, AVI, MOV, etc.

[0058] It is understandable that the embodiment of the present application uses a connection line such as HDMI, VGA, DVI or DisplayPort to connect the host computer to the projector.

[0059] It should be noted that in some embodiments of the present application, the preset angle is 220°. The present application is configured to project the scene video onto a 220° surround screen through a projector, which can further simulate the real form of the vehicle, and at the same time can enhance the driver's driving perception and avoid driving dizziness. The preset angle can also be 200°, 230°, or 250°. Those skilled in the art can set the size of the preset angle according to actual conditions, and the embodiments of the present application do not limit the size of the preset angle.

[0060] In some embodiments of the present application, the vehicle voltage sudden change reset performance test system also includes a vehicle sensor module and an injection module. The injection module is communicatively connected to a host computer. The injection module is used to inject the scene video stored in the host computer into the vehicle sensor module through a video injection method or a bus injection method.

[0061] The video injection method includes injecting preset video data into the vehicle sensor module by simulating the video signal captured by the camera. It is understandable that a video signal generator is usually used to generate and inject the video stream. The bus injection method includes converting the video data into a format suitable for the vehicle network bus, such as CAN, LIN or FlexRay, and then sending it to the vehicle sensor module through the bus. It should be noted that the bus injection method requires an adapter or converter to encapsulate the video data into a bus message. The injection of the vehicle sensor module is an important part of vehicle testing. The injection module injects the scene video stored in the host computer into the vehicle sensor module through the video injection method or the bus injection method. It can realize the reset performance test of the vehicle voltage sudden change and verify the vehicle's perception system, decision logic and response mechanism without relying on other redundant hardware. This is crucial for vehicle development and improvement.

[0062] In some embodiments of the present application, the vehicle voltage sudden change reset performance test system also includes a radar sensor and an inertial measurement unit. The injection module is used to inject radar data detected by the radar sensor into the vehicle sensor module through a bus injection method; the injection module is also used to inject the inertial signal detected by the inertial measurement unit into the vehicle sensor module through voltage channel protocol simulation or bus injection.

[0063] The radar sensor is used to capture radar signals such as ultrasonic radar, millimeter-wave radar, and lidar. The radar signal data detected by the radar sensor is injected into the vehicle sensing module through the injection module in the form of vehicle network bus injection to simulate the actual situation of the vehicle driving process, realize the reset performance test of the vehicle voltage sudden change and verify the vehicle's perception system; the inertial measurement unit is used to output signals related to acceleration, angular velocity and magnetic field. The signals related to acceleration, angular velocity and magnetic field output by the inertial measurement unit are injected into the vehicle sensing module through the injection module in the form of voltage channel protocol simulation or bus injection to further simulate the actual situation of the vehicle driving process, realize the reset performance test of the vehicle voltage sudden change and verify the vehicle's perception system.

[0064] In some embodiments of the present application, the vehicle voltage sudden change reset performance testing system further includes a temperature environment chamber, which is used to provide different preset temperature environments to place the vehicle in different temperature environment working conditions.

[0065] By setting a temperature environment chamber in the vehicle voltage sudden change reset performance test system, the temperature environment chamber is used to wrap the vehicle to provide different preset temperature environments, such as the temperature environment chamber provides a high temperature, medium temperature or low temperature environment, or the temperature environment chamber provides a temperature environment of -15 degrees Celsius, 0 degrees Celsius, and 30 degrees Celsius, so that the vehicle is in a variety of different temperature environment conditions. Under a variety of different temperature environment conditions, the four-quadrant programmable power supply output indicates the abnormal working voltage corresponding to the control curve of the voltage waveform change to change the vehicle power supply voltage value. The acquisition module collects the vehicle's electrical signals and transmits them to the host computer for comparative analysis to generate analysis results. The report generation module generates the vehicle voltage sudden change reset performance test results based on the analysis results. At the same time, the various functions of the vehicle are tested and analyzed to see whether the various functions of the vehicle are normal.

[0066] The temperature environment chamber provides different temperature environment conditions, and the vehicle voltage sudden change reset performance test is carried out under a variety of different temperature environment conditions. It can simulate the actual driving conditions of the vehicle in different weather and seasons, and can improve the comprehensiveness and reliability of the vehicle voltage sudden change reset performance test results.

[0067] Reference Figure 2 As shown, in the vehicle voltage sudden change reset performance test system, the acquisition module includes a current acquisition module and a voltage acquisition module, and the acquisition module also includes a CAN signal acquisition interface. Figure 3 As shown, Figure 3This is the connection relationship diagram of the programmable power supply. The current acquisition module and the programmable power supply are connected in series, the positive pole of the current acquisition module is connected to the negative pole of the vehicle wiring harness, the negative pole of the current acquisition module is connected to the negative pole of the programmable power supply, the positive pole of the programmable power supply is connected to the positive pole of the vehicle wiring harness, and the voltage acquisition module and the programmable power supply are connected in parallel.

[0068] The programmable power supply replaces the vehicle battery. The programmable power supply is connected in series with the vehicle wiring harness and current acquisition module, and in parallel with the voltage acquisition module. It can be understood that the current acquisition module is connected to the vehicle wiring harness through the vehicle's data transmission interface, the current acquisition module collects the vehicle's static current signal in real time, the voltage acquisition module performs overvoltage recovery, and the CAN signal acquisition interface collects network management messages. The collected vehicle's static current signal, overvoltage signal, network management message and other vehicle electrical signals are transmitted to the host computer. The host computer analyzes and compares the vehicle's electrical signals to determine the accuracy of the test input conditions and generate analysis results.

[0069] Reference Figure 4 As shown, Figure 4 1 is a flow chart of a method for testing the reset performance of a vehicle voltage sudden change provided by an embodiment of the present application. The method for testing the reset performance of a vehicle voltage sudden change includes but is not limited to steps S100 to S500. Specifically,

[0070] Step S100: sending a program control instruction, the program control instruction is used to generate a control curve indicating a change in a voltage waveform;

[0071] Step S200: In response to the program control instruction, outputting an abnormal operating voltage corresponding to a control curve indicating a voltage waveform change;

[0072] Step S300: collecting the electrical signal of the vehicle and transmitting the electrical signal of the vehicle to the host computer;

[0073] Step S400: performing comparative analysis on the electrical signal and generating analysis results;

[0074] Step S500: Generate corresponding key-value pairs according to the analysis results, and generate vehicle voltage sudden change reset performance test results according to the key-value pairs.

[0075] The reset performance test method of a vehicle voltage sudden change includes: sending a program-controlled instruction, the program-controlled instruction is used to generate a control curve indicating a voltage waveform change, in response to the program-controlled instruction, outputting an abnormal working voltage corresponding to the control curve indicating a voltage waveform change, and applying the abnormal working voltage to the wiring harness of the entire vehicle, using a program-controlled power supply to provide quantitative program-controlled hardware support for the vehicle power supply voltage disturbance, and realizing a curve-type input disturbance vehicle power supply voltage. Compared with the traditional method of providing vehicle power supply voltage disturbance by manually changing the vehicle power supply voltage, the curve-type input disturbance vehicle power supply voltage of the present application improves the degree of automation of the reset performance test of the vehicle voltage sudden change, saves labor costs, and improves the accuracy of vehicle voltage sudden change control. The vehicle's electrical signals output by the vehicle's data transmission interface are collected, and the collected vehicle electrical signals are transmitted to the host computer; the host computer collects, compares and analyzes the electrical signals to determine the accuracy of the test input conditions and generates analysis results; the report generation module generates corresponding key-value pairs according to the analysis results output by the host computer, and compares the key-value pairs with the preset functional index qualified table to determine whether the vehicle's power supply voltage is normal under long-term abnormal voltage interference, and generates the reset performance test results of the vehicle's voltage sudden change. By analyzing and comparing the electrical signals by the host computer and comparing the key-value pairs with the preset functional index qualified table through the report generation module to determine whether the vehicle's functions are normal, and then generating the reset performance test results of the vehicle's voltage sudden change, the accuracy of the test results of the reset performance test of the vehicle's voltage sudden change can be improved, while improving the accuracy of the vehicle's vehicle status test results.

[0076] Reference Figure 5 As shown, Figure 5 is a flow chart of a method for collecting an electrical signal of a vehicle and transmitting the electrical signal of the vehicle to a host computer provided in an embodiment of the present application. The method for collecting an electrical signal of a vehicle and transmitting the electrical signal of the vehicle to a host computer includes but is not limited to steps S310 to S350. Specifically,

[0077] Step S310: responding to the vehicle's electrical signal collection instruction;

[0078] Step S320: collecting the static current signal of the vehicle through the current collection module;

[0079] Step S330: collecting the vehicle road terminal voltage signal through the voltage collection module;

[0080] Step S340: collecting network management messages through the CAN signal collection interface;

[0081] Step S350: converting the vehicle static current signal, the vehicle road terminal voltage signal and the network management message into a preset format and transmitting them to the host computer.

[0082] In some embodiments of the present application, the vehicle voltage sudden change reset performance test system includes an acquisition module, the acquisition module includes a current acquisition module and a voltage acquisition module, the current acquisition module and the programmable power supply are connected in series, the positive pole of the current acquisition module is connected to the negative pole of the vehicle wiring harness, the negative pole of the current acquisition module is connected to the negative pole of the programmable power supply, the positive pole of the programmable power supply is connected to the positive pole of the vehicle wiring harness, and the voltage acquisition module and the programmable power supply are connected in parallel. It can be understood that the current acquisition module is connected in series with the vehicle wiring harness through the vehicle's data transmission interface, and the voltage acquisition module and the programmable power supply are connected in parallel.

[0083] When receiving the vehicle's electrical signal collection instruction, in response to the vehicle's electrical signal collection instruction, the collection module collects the vehicle's electrical signal, including: collecting the vehicle's static current signal through the current collection module, collecting the vehicle's road-end voltage signal through the voltage collection module, collecting the network management message through the CAN signal collection interface, and then converting the vehicle's static current signal, the vehicle's road-end voltage signal and the network management message into a preset format, such as an asc format, and finally storing the vehicle's static current signal, the vehicle's road-end voltage signal and the network management message in the asc format in a data archive file, and uploading it to the host computer, which compares and analyzes the vehicle's static current signal, the vehicle's road-end voltage signal and the network management message to determine the accuracy of the test input conditions and generate analysis results.

[0084] Reference Figure 6 As shown, Figure 6 4 is a flowchart of a method for comparing and analyzing electrical signals and generating analysis results provided by an embodiment of the present application. The method for comparing and analyzing electrical signals and generating analysis results includes but is not limited to steps S410 to S420. Specifically,

[0085] Step S410: comparing the vehicle road terminal voltage signal collected by the voltage collection module with the voltage of the control curve indicating the voltage waveform change, and determining whether there is a message error frame of the vehicle road terminal voltage signal;

[0086] Step S420: sorting out message error frames of the vehicle road-end voltage signal, and generating analysis results based on abnormal time-abnormal message.

[0087] In some embodiments of the present application, after collecting the electrical signal of the vehicle and transmitting the electrical signal of the vehicle to the host computer, the host computer will compare and analyze the electrical signal to determine the accuracy of the test input conditions and generate analysis results. The method for comparing and analyzing the electrical signal and generating analysis results includes: comparing the vehicle road terminal voltage signal collected by the voltage acquisition module with the voltage of the control curve indicating the voltage waveform change, judging whether the vehicle road terminal voltage signal is consistent with the working voltage corresponding to the voltage of the control curve output by the program-controlled power supply and indicating the voltage waveform change. When the vehicle road terminal voltage signal is inconsistent with the working voltage corresponding to the voltage of the control curve output by the program-controlled power supply and indicating the voltage waveform change, confirming the presence of a message error frame of the vehicle road terminal voltage signal, and recording the abnormal voltage and abnormal time. Then, the message error frame of the vehicle road terminal voltage signal is sorted, and an analysis result based on abnormal time-abnormal message is generated, which improves the visualization of the analysis result of the vehicle's electrical signal, and the tester can quickly determine the vehicle abnormality based on the analysis result based on abnormal time-abnormal message, and improves the accuracy of the reset performance test result of the vehicle voltage sudden change.

[0088] After generating the analysis results based on abnormal time-abnormal message, the reset performance test method of the vehicle voltage sudden change also includes: generating the corresponding abnormal time-abnormal message key-value pair according to the analysis results, and comparing the key-value pair of the abnormal time-abnormal message with the preset functional index qualified table, determining whether the vehicle power supply voltage is normal under the long-term abnormal voltage interference of the vehicle and generating the reset performance test results of the vehicle voltage sudden change. By analyzing and comparing the electrical signals and comparing the key-value pairs with the preset functional index qualified table through the report generation module to determine whether the functions of the vehicle are normal, and then generating the reset performance test results of the vehicle voltage sudden change, the accuracy of the test results of the reset performance test of the vehicle voltage sudden change can be improved, and at the same time, the accuracy of the vehicle status test results can be improved.

[0089] Reference Figure 7 As shown, Figure 7 is a flow chart of a vehicle function test method provided by an embodiment of the present application. The vehicle function test method includes but is not limited to steps S600 to S620. Specifically,

[0090] Step S600: responding to the function test instruction, checking in sequence according to the function test sequence table whether each function in the function test sequence table operates normally;

[0091] Step S610: When a function abnormality is detected, the current function is marked abnormal, and a current function abnormality message is output;

[0092] Step S620: When it is detected that the function is normal, a detection pass message is sent and the detection of the next function is performed.

[0093] In some embodiments of the present application, the vehicle voltage sudden change reset performance test method also includes: in the case of a curve input disturbance vehicle power supply voltage, detecting whether the various functions of the vehicle are operating normally. In response to the function test instruction, each function in the function test sequence table is detected in turn according to the function test sequence table to determine whether it is operating normally. When a function abnormality is detected, the current function is marked abnormal, and the current function abnormality message is output. When the function is detected to be normal, a qualified detection message is sent, and the next function is detected, until the test of the last function in the function test sequence table is completed. By detecting whether the various functions of the vehicle are operating normally in the case of a curve input disturbance vehicle power supply voltage, using abnormal message detection, diagnosis abnormal message monitoring, etc. to determine whether the various functions of the vehicle are abnormal, it is possible to determine the quality of the vehicle voltage sudden change reset performance, and judge the status of the vehicle according to the abnormal function message.

[0094] In some embodiments of the present application, detecting whether the function of the vehicle is normal includes: responding to the function test instruction, first setting the ignition switch to the ON position, and ensuring that the generator and the DCDC power supply do not discharge the vehicle battery, placing the vehicle in a temperature environment chamber at a preset temperature, such as -20 degrees Celsius, 25 degrees Celsius or 40 degrees Celsius, and the host computer sends a program control instruction, which is used to generate a control curve indicating the change of the voltage waveform, and outputting an abnormal working voltage corresponding to the control curve indicating the change of the voltage waveform. Figure 8 As shown, Figure 8 It is a control curve diagram indicating the change of voltage waveform. The control curve of voltage waveform change includes a first voltage interval ΔU1 and a second voltage interval ΔU2. Between the range of Umax and 6V, the control curve of voltage waveform change controls the voltage to drop. After the CAN bus signal returns to normal, that is, the voltage returns to Umax, the voltage is continued to be controlled to drop, and the control voltage is gradually decreased by the first voltage interval ΔU1 to perform multi-level voltage tests until the voltage drops to 6V. It should be noted that after the control voltage drops by the first voltage interval ΔU1 to perform each level voltage test, it is necessary to ensure that the CAN bus signal returns to normal before performing the next level voltage test. After the voltage disturbance drops to 6V, the control curve of voltage waveform change controls the voltage to gradually drop by the second voltage interval ΔU2 to perform multi-level voltage tests. It should be noted that after the control voltage drops by the second voltage interval ΔU2 to perform each level voltage test, it is necessary to ensure that the CAN bus signal returns to normal, that is, the voltage returns to Umax before performing the next level voltage test.

[0095] It should be noted that in some embodiments of the present application, Umax is 9V, the first voltage interval ΔU1 is 0.5V, and the second voltage interval ΔU2 is 0.2V. Those skilled in the art set the size of Umax, the first voltage interval ΔU1, and the second voltage interval ΔU2 according to actual conditions. The embodiments of the present application do not limit the size of Umax, the first voltage interval ΔU1, and the second voltage interval ΔU2.

[0096] It should be noted that if Figure 8 As shown, in some embodiments of the present application, t1 is 5s, t2 is 100ms, to≥10s, to is the time required for the vehicle's CAN bus signal to return to normal, and the control curve of the voltage waveform change controls the voltage change time to be ≤10ms to ensure the timeliness of the vehicle voltage sudden change reset performance test, thereby improving the accuracy of the vehicle voltage sudden change reset performance test results.

[0097] In some embodiments of the present application, the function test sequence includes multiple vehicle functions, including in sequence: unlocking function test, starting function test, gear shift function test, sunroof system test, sunshade function test, wiper function test, horn function test, etc. In response to the function test instruction, each function in the function test sequence table is checked in sequence according to the function test sequence table to see whether it is operating normally. During the whole vehicle function test, the network management message must have no error frames; after the test, there must be no fault code and no error frames in the network management message, indicating that each function test in the function test sequence has passed and meets the design requirements, and the vehicle voltage sudden change reset performance is judged to be excellent, and the status of the whole vehicle is judged according to the vehicle voltage sudden change reset performance and functional abnormality messages.

[0098] Reference Fig. 9 As shown, Fig. 9It is a structural diagram of a controller 1000 provided in an embodiment of the present application, including a processor 1001, which can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the method provided in the embodiment of the present application; a memory 1002, which can be implemented in the form of a read-only memory 1002 (Read Only Memory, ROM), a static storage device, a dynamic storage device or a random access memory 1002 (Random Access Memory, RAM), etc. The memory 1002 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1002 and are called by the processor 1001 to execute the embodiments of this application; the input / output interface 1003 is used to implement information input and output; the communication interface 1004 is used to implement communication interaction between this device and other devices, and communication can be achieved through wired methods (such as USB, network cables, etc.) or wireless methods (such as mobile networks, WIFI, Bluetooth, etc.); a bus transmits information between various components of the device (such as the processor 1001, the memory 1002, the input / output interface 1003 and the communication interface 1004); wherein the processor 1001, the memory 1002, the input / output interface 1003 and the communication interface 1004 are connected to each other within the device through the bus.

[0099] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer-readable storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0100] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A vehicle voltage sudden change reset performance test system, It is characterized in that include: A host computer, used to send program control instructions, wherein the program control instructions are used to generate a control curve indicating a change in a voltage waveform, and the host computer is also used to compare and analyze the electrical signals to generate analysis results; A programmable power supply, the programmable power supply is connected to the vehicle wiring harness, and the programmable power supply is used to respond to the programmable instruction and output an abnormal working voltage corresponding to the control curve indicating the change of the voltage waveform; A collection module, wherein the input end of the collection module is connected to the data transmission interface of the vehicle to collect the electrical signal of the vehicle; The output end of the acquisition module is connected to the host computer via a local area network to transmit the collected electrical signal of the vehicle to the host computer; The report generation module is used to generate corresponding key-value pairs according to the analysis results, and to generate reset performance test results of vehicle voltage sudden change according to the key-value pairs.

2. The vehicle voltage sudden change reset performance test system according to claim 1, It is characterized in that It also includes a shaft-coupled dynamometer, which is used to simulate wheel torque and rotation speed to achieve simulation of real vehicle driving conditions.

3. The vehicle voltage sudden change reset performance testing system according to claim 1, It is characterized in that It also includes a projector, which is communicatively connected to the host computer, and is used to load the scene video stored in the host computer and project the scene video onto a surround-view screen with a preset angle.

4. The vehicle voltage sudden change reset performance test system according to claim 1, It is characterized in that It also includes a vehicle sensing module and an injection module. The injection module is communicatively connected to the host computer. The injection module is used to inject the scene video stored in the host computer into the vehicle sensing module through a video injection method or a bus injection method.

5. The vehicle voltage sudden change reset performance test system according to claim 4, It is characterized in that It also includes a radar sensor and an inertial measurement unit. The injection module is used to inject radar data detected by the radar sensor into the vehicle sensor module through bus injection; the injection module is also used to inject inertial signals detected by the inertial measurement unit into the vehicle sensor module through voltage channel protocol simulation or bus injection.

6. The vehicle voltage sudden change reset performance testing system according to claim 1, It is characterized in that It also includes a temperature environment chamber, which is used to provide different preset temperature environments to put the vehicle in different temperature environment working conditions.

7. The vehicle voltage sudden change reset performance testing system according to claim 1, It is characterized in that The acquisition module includes a current acquisition module and a voltage acquisition module. The current acquisition module and the programmable power supply are connected in series, the positive pole of the current acquisition module is connected to the negative pole of the vehicle wiring harness, the negative pole of the current acquisition module is connected to the negative pole of the programmable power supply, the positive pole of the programmable power supply is connected to the positive pole of the vehicle wiring harness, and the voltage acquisition module and the programmable power supply are connected in parallel.

8. A method for testing the reset performance of a vehicle voltage sudden change, applied to the reset performance testing system of a vehicle voltage sudden change as claimed in any one of claims 1 to 7, It is characterized in that include: Sending a program control instruction, wherein the program control instruction is used to generate a control curve indicating a change in a voltage waveform; In response to the program control instruction, outputting an abnormal operating voltage corresponding to the control curve indicating a change in the voltage waveform; Collecting electrical signals from the vehicle and transmitting the electrical signals from the vehicle to a host computer; Performing comparative analysis on the electrical signals and generating analysis results; A corresponding key-value pair is generated according to the analysis result, and a reset performance test result of a vehicle voltage sudden change is generated according to the key-value pair.

9. The vehicle voltage sudden change reset performance testing method according to claim 8, It is characterized in that The acquisition module includes a current acquisition module, a voltage acquisition module, and a CAN signal acquisition interface. The acquisition of the vehicle's electrical signal and the transmission of the vehicle's electrical signal to the host computer include: Responsive to a collection instruction of an electrical signal from a vehicle; Collecting the static current signal of the vehicle through the current acquisition module; The voltage acquisition module is used to collect the vehicle road terminal voltage signal; Collect network management messages through the CAN signal acquisition interface; The vehicle static current signal, the vehicle road terminal voltage signal and the network management message are converted into a preset format and transmitted to a host computer.

10. The vehicle voltage sudden change reset performance testing method according to claim 9, It is characterized in that The comparing and analyzing the electrical signals and generating analysis results comprises: Comparing the vehicle road terminal voltage signal collected by the voltage collection module with the voltage of the control curve indicating the voltage waveform change, and determining whether there is a message error frame of the vehicle road terminal voltage signal; The message error frames of the vehicle road terminal voltage signal are sorted, and an analysis result based on abnormal time-abnormal message is generated.

11. The vehicle voltage sudden change reset performance testing method according to claim 8, It is characterized in that Also includes: In response to the function test instruction, detecting in sequence according to the function test sequence table whether each function in the function test sequence table is operating normally; When a function abnormality is detected, the current function is marked as abnormal and a current function abnormality message is output; When it is detected that the function is normal, a detection pass message is sent and the next function detection is performed.

12. A controller, It is characterized in that include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method according to any one of claims 8 to 11 when executing the computer program.

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