Short circuit test method and device for vehicle insurance wire harness, and electronic equipment

Abstract

The invention discloses a short-circuit test method and device for a vehicle insurance harness and electronic equipment, the method is applied to the short-circuit test device connected with a short-circuit test circuit of the vehicle insurance harness, and the vehicle insurance harness comprises a fuse, a relay, a controller harness, a short-circuit piece and a grounding harness which are connected in sequence. The short-circuit test circuit comprises a direct-current power supply, a first switch and a second switch, and the method comprises the steps of obtaining current data of the short-circuit test circuit and temperature data of the fuse by responding to closing signals of the first switch and the second switch, analyzing the current data and the temperature data, and determining a short-circuit test result of the fuse, the short-circuit test result comprises whether the fuse passes the test or not, responding to the disconnection signals of the first switch and the second switch, and generating the short-circuit test report according to the short-circuit test result, so that whether the impact on the vehicle insurance wire harness in the short-circuit test process is safe or not can be quickly and accurately analyzed, and the working efficiency of the vehicle short-circuit test is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing systems, and in particular to a short-circuit testing method, device and electronic equipment for a vehicle insurance harness. Background Art

[0002] At present, with the increasing number of sensors, controllers, and actuators in automotive electronic and electrical systems, the power supply network environment of test vehicles has become more complex. In this process, short circuits in the wiring harness often occur due to errors in the pin definition of the controller, errors in the control logic of the controller, or collision impacts on the prototype vehicle. As a key link in the safety protection system of the vehicle wiring harness, the fast melting ability of the fuse when a short circuit occurs is extremely important.

[0003] However, with the continuous iteration and upgrading of vehicle models, the existing vehicle power distribution technology has changed from the traditional direct-insert mechanical copper sheet to a more advanced circuit board design, which integrates the relevant relays in the distribution box circuit board. Although this technological advancement has improved the performance and reliability of the vehicle, it has also brought new challenges to the construction of the short-circuit test environment. Therefore, how to quickly and accurately analyze whether there is a safety hazard in the short circuit of the vehicle fuse harness under the new circuit board distribution architecture has become an important problem that needs to be solved in vehicle quality control. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a short-circuit test method, device and electronic equipment for a vehicle insurance harness, which can quickly and accurately analyze whether the impact to the vehicle insurance harness during the short-circuit test is safe, and improve the work efficiency of the vehicle short-circuit test.

[0005] In a first aspect, an embodiment of the present invention provides a short-circuit test method for a vehicle insurance harness, which is applied to a short-circuit test device connected to a short-circuit test circuit of the vehicle insurance harness, wherein the vehicle insurance harness comprises a fuse, a relay, a controller harness, a short-circuit piece, and a ground harness connected in sequence; a pair of contacts of the relay are respectively connected to the fuse and the controller harness; the short-circuit test circuit comprises a DC power supply, a first switch, and a second switch, wherein the first switch is connected between the positive pole of the DC power supply and the fuse, and the second switch is connected between the positive pole of the DC power supply and one end of the coil of the relay, and the other end of the coil of the relay and the ground harness are both connected to the negative pole of the DC power supply, and the method comprises: In response to closing signals of the first switch and the second switch, acquiring current data of the short-circuit test circuit and temperature data of the fuse; Analyzing the current data and the temperature data to determine a short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test; In response to the disconnection signals of the first switch and the second switch, a short circuit test report is generated according to the short circuit test result.

[0006] In one embodiment, analyzing the current data and the temperature data to determine the short-circuit test result of the fuse includes: Analyzing the current data to determine whether the fuse meets the preset current value requirement; Analyze the temperature data to determine whether the temperature of the fuse meets the preset temperature value requirement; The short-circuit test result of the fuse is determined according to the judgment result of the preset current value requirement and the judgment result of the preset temperature value requirement.

[0007] In one embodiment, analyzing the current data to determine whether the fuse meets the preset current value requirement includes: A current time series is calculated based on the current data, wherein the current time series includes a plurality of continuously recorded current sampling time points and their corresponding sampling current values; Determining the short-circuit duration of the fuse according to the current time series; Calculating the short-circuit current average value within the short-circuit duration according to the current time series and the short-circuit duration; Whether the fuse meets the preset current value requirement is determined according to the short-circuit current average value and the short-circuit duration.

[0008] In one embodiment, determining the short-circuit duration of the fuse according to the current time series includes: Traversing the current time series to obtain a current maximum value and a current minimum value, and calculating a current characteristic threshold value according to the current maximum value and the current minimum value; Compare each of the sampled current values ​​in the current time series with the current characteristic threshold in sequence to determine at least one first sampled current value and at least one second sampled current value, wherein the first sampled current value is the first sampled current value greater than the current characteristic threshold and the sampling time of the first sampled current value is before the current maximum value, and the second sampled current value is the first sampled current value less than the current characteristic threshold and the sampling time of the second sampled current value is after the current maximum value; Determining a short circuit start time according to a first current sampling time point of the first sampled current value; Determining a short circuit end time according to a second current sampling time point of the second sampled current value; The short circuit duration of the fuse is calculated according to the short circuit start time and the short circuit end time.

[0009] In one embodiment, judging whether the fuse meets the preset current value requirement according to the short-circuit current average value and the short-circuit duration includes: The short-circuit current average value is compared with the rated current value and the preset ratio value, and the short-circuit duration is compared with the preset duration. If the short-circuit current average value is greater than the product of the rated current value and the preset ratio value, and the short-circuit duration is less than the preset duration or is within the preset duration range, it is determined that the fuse meets the preset current value requirement.

[0010] In one embodiment, the method further comprises: If the short-circuit current average value is less than the product of the rated current value and the preset ratio value, or the short-circuit duration is greater than the preset duration or exceeds the preset duration range, it is determined that the fuse does not meet the preset current value requirement.

[0011] In one embodiment, the temperature data includes a first temperature value and a second temperature value, and the analyzing the temperature data to determine whether the temperature of the fuse meets the preset temperature value requirement includes: When the difference between the first temperature value and the second temperature value is less than the preset temperature value or within the preset temperature value range, the fuse is judged to meet the preset temperature value requirement; when the difference between the first temperature value and the second temperature value is greater than the preset temperature value or exceeds the preset temperature value range, the fuse is judged to not meet the preset temperature value requirement, wherein the first temperature value is the initial temperature recorded at the beginning of the short circuit test, and the second temperature value is the highest temperature recorded during the short circuit test.

[0012] In one embodiment, the short circuit test circuit further includes a current sensor and a temperature sensor, and the step of obtaining the current data of the short circuit test circuit and the temperature data of the fuse in response to the closing signals of the first switch and the second switch includes: In response to the closing signals of the first switch and the second switch, acquiring the current analog signal of the short-circuit test circuit collected by the current sensor, and acquiring the temperature analog signal of the fuse collected by the temperature sensor; The current data of the short-circuit test circuit and the temperature data of the fuse are obtained by integrating and encoding the current simulation signal and the temperature simulation signal.

[0013] In a second aspect, an embodiment of the present invention provides a short-circuit test device for a vehicle insurance harness, wherein the vehicle insurance harness comprises a fuse, a relay, a controller harness, a short-circuit piece, and a ground harness connected in sequence; a pair of contacts of the relay are respectively connected to the fuse and the controller harness; the short-circuit test circuit comprises a DC power supply, a first switch, and a second switch, wherein the first switch is connected between the positive pole of the DC power supply and the fuse, the second switch is connected between the positive pole of the DC power supply and one end of the coil of the relay, the other end of the coil of the relay and the ground harness are both connected to the negative pole of the DC power supply, and the device comprises: an acquisition module, configured to acquire current data of the short-circuit test circuit and temperature data of the fuse in response to closing signals of the first switch and the second switch; An analysis module, configured to analyze the current data and the temperature data to determine a short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test; An output module is used to generate a short-circuit test report according to the short-circuit test result in response to the disconnection signals of the first switch and the second switch.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, the electronic device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores 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 perform the short-circuit test method for the vehicle insurance harness of the first aspect.

[0015] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the short-circuit test method for the vehicle insurance harness of the first aspect when executed by a processor.

[0016] In a fifth aspect, an embodiment of the present invention provides a computer program product, the computer program product includes a computer program, and the computer program is stored in a computer-readable storage medium. A processor of a computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the computer device executes the short-circuit test method of the vehicle insurance harness according to the first aspect.

[0017] According to an embodiment of the present invention, a short circuit test method for a vehicle insurance harness is provided. The method is applied to a short circuit test device connected to a short circuit test circuit of the vehicle insurance harness. The vehicle insurance harness includes a fuse, a relay, a controller harness, a short circuit piece and a ground harness connected in sequence. A pair of contacts of the relay are respectively connected to the fuse and the controller harness. The short circuit test circuit includes a DC power supply, a first switch and a second switch. The first switch is connected between the positive pole of the DC power supply and the fuse, and the second switch is connected between the positive pole of the DC power supply and one end of the coil of the relay. The other end of the coil of the relay and the ground harness are both connected to the negative pole of the DC power supply. The method obtains the current data of the short circuit test circuit and the temperature data of the fuse in response to the closing signal of the first switch and the second switch, and then analyzes the current data and the temperature data to determine the short circuit test result of the fuse, wherein the short circuit test result includes whether the fuse passes the test, and then generates a short circuit test report according to the short circuit test result in response to the opening signal of the first switch and the second switch. The embodiment of the present invention controls the on and off of the short-circuit test circuit by responding to a first switch connected to the fuse and responding to a second switch connected to the relay, so as to provide an electrical signal to control the collection of current data and temperature data of the fuse and perform analysis, determine the short-circuit test result of the fuse and generate a test report, and can quickly and accurately analyze whether the impact on the vehicle insurance harness during the short-circuit test is safe, and improve the work efficiency of the vehicle short-circuit test.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a schematic diagram of a short-circuit test circuit provided by an embodiment of the present invention; Figure 2 It is a flow chart of a short-circuit testing method of a vehicle insurance harness provided by an embodiment of the present invention; Figure 3 yes Figure 2 A detailed flowchart of step S200 in FIG. Figure 4 yes Figure 3 A detailed flowchart of step S210 in FIG. Figure 5is a short-circuit test current-time relationship diagram of a vehicle insurance harness provided by an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a short-circuit test device for a vehicle insurance harness provided by an embodiment of the present invention; Figure 7 It is a structural schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] At present, with the increasing number of sensors, controllers, and actuators in automotive electronic and electrical systems, the power supply network environment of test vehicles has become more complex. In this process, short circuits in the wiring harness often occur due to errors in the pin definition of the controller, errors in the control logic of the controller, or collision impacts on the prototype vehicle. As a key link in the safety protection system of the vehicle wiring harness, the fast melting ability of the fuse when a short circuit occurs is extremely important.

[0025] However, with the continuous iteration and upgrading of vehicle models, the existing vehicle power distribution technology has changed from the traditional direct-insert mechanical copper sheet to a more advanced circuit board design, which integrates the relevant relays in the distribution box circuit board. Although this technological advancement has improved the performance and reliability of the vehicle, it has also brought new challenges to the construction of the short-circuit test environment. Therefore, how to quickly and accurately analyze whether there is a safety hazard in the short circuit of the vehicle fuse harness under the new circuit board distribution architecture has become an important problem that needs to be solved in vehicle quality control.

[0026] In order to solve the above-mentioned problems, the embodiments of the present invention provide a short-circuit test method, device and electronic equipment for a vehicle fuse harness, which can quickly and accurately analyze whether the impact to the vehicle fuse harness during the short-circuit test is safe, and improve the working efficiency of the vehicle short-circuit test.

[0027] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0028] See also Figure 1 As shown, Figure 1 A schematic diagram of a short-circuit test circuit is provided for an embodiment of the present invention, wherein a vehicle insurance harness in the short-circuit test circuit includes a fuse, a relay, a controller harness, a short-circuit plate and a ground harness connected in sequence, a pair of contacts of the relay are respectively connected to the fuse and the controller harness, and the short-circuit test circuit also includes a DC power supply, a first switch and a second switch, the first switch is connected between the positive pole of the DC power supply and the fuse, and is used to control the on and off of the main circuit, the second switch is connected between the positive pole of the DC power supply and one end of the coil of the relay, and is used to control the attraction and release of the relay, the other end of the coil of the relay and the ground harness are both connected to the negative pole of the DC power supply, and the series connection of the DC power supply in the short-circuit test circuit can simulate the power supply condition of the entire vehicle, thereby powering the short-circuit test circuit.

[0029] Specifically, when preparing for the test, a special tool can be used to remove the positive and negative terminals of the distribution box in the controller corresponding to the fuse, and a wire is used to connect the fuse in series with the DC power supply, the load, and the first switch, and a short-circuit connection operation is performed through a short-circuit plate, and then a voltage sensor is connected to both ends of the DC power supply to measure the voltage at both ends of the DC power supply to obtain voltage data, a current sensor is connected to the negative end of the DC power supply to obtain current data, and a temperature sensor is connected to the load and the fuse end to obtain temperature data of the fuse and the load during the short-circuit test. In one embodiment, since the short-circuit current is too large, the current sensor can be a clamp current sensor, and the load can be an adjustable load box.

[0030] Furthermore, during the test operation, the second switch can be closed first, so that the current of the DC power supply flows to the control end of the relay, so that the relay is energized. Subsequently, the first switch is closed, the DC power supply is connected in parallel to the load side of the circuit, the circuit is closed, and the current is allowed to flow to the load and the fuse and connect the controller harness and the ground harness through the short-circuit plate, and finally return to the ground point, that is, the common ground point of the short-circuit test circuit, thereby ensuring the stable grounding of the circuit and forming a complete current loop.

[0031] like Figure 2 As shown, Figure 2 A schematic flow chart of a short-circuit test method for a vehicle insurance harness is provided in accordance with an embodiment of the first aspect of the present invention. The method in accordance with the embodiment of the present invention can be applied to a short-circuit test device. The method includes but is not limited to the following steps S100 to S300: Step S100 , in response to closing signals of the first switch and the second switch, obtaining current data of the short circuit test circuit and temperature data of the fuse.

[0032] In this step, the short circuit test device can respond to the closing signal of the first switch and the second switch, and start the short circuit test program when the first switch and the second switch are closed, and measure the current data of the short circuit test circuit and the temperature data of the fuse in real time during the short circuit test, wherein the current data can include the current data of the short circuit test circuit obtained by the current sensor, and the temperature data can include the temperature data of the fuse and the load in the short circuit test circuit obtained by the temperature sensor. In this embodiment, the short circuit test circuit can include a DC power supply, a first switch, a second switch, and a vehicle insurance harness to be tested, and the vehicle insurance harness includes components such as a fuse, a relay, a controller harness, a short circuit piece, and a ground harness connected in sequence. The specific connection relationship of each component can refer to any of the above embodiments. Further, the short circuit test circuit can also include a distribution box, and a fuse is arranged in the distribution box. The current data of the short circuit test circuit can be a current measurement value through the fuse in the short circuit test circuit measured by the current sensor, or a current measurement value through the distribution box in the short circuit test circuit measured by the current sensor. In one embodiment, the number of fuses connected to the vehicle insurance harness can be multiple, and multi-level fuses can be used in the vehicle insurance harness to ensure the safety of the entire vehicle. Therefore, there can be multiple fuses to be tested in the short-circuit test circuit of the vehicle insurance harness, which can contain fuses of multiple levels and / or contain multiple fuses of the same level. One or more sensors can be used to obtain current data and temperature data of multiple fuses to be tested in the short-circuit test circuit and the short-circuit test process.

[0033] Step S200, analyzing the current data and the temperature data to determine a short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test.

[0034] In this step, by performing a short-circuit test on the fuse under simulated short-circuit conditions and analyzing the current data passing through the fuse in the short-circuit test circuit and the temperature data of the fuse, the short-circuit test result of the fuse can be determined, which can help technicians determine the performance of the fuse in the short-circuit test. Furthermore, it can be determined whether the fuse in the short-circuit test circuit meets the preset requirements based on the short-circuit test results. If it meets the preset requirements, it indicates that the fuse has passed the short-circuit test, wherein the preset requirements can be set according to the public technical specifications such as the "Complete Vehicle Wire Harness Short-Circuit Test Specification", or can be set according to the technical requirements customized by the vehicle manufacturer, such as the maximum current that the fuse can withstand.

[0035] Step S300 , in response to the disconnection signals of the first switch and the second switch, generating a short circuit test report according to the short circuit test result.

[0036] In this step, the short-circuit test device can respond to the disconnection signal of the first switch and the second switch, and terminate the short-circuit test program when the first switch and the second switch are disconnected, and then compare and check based on the determined short-circuit test results and the measured short-circuit test data, and automatically generate a corresponding short-circuit test report to record the data and test results collected during the short-circuit test, wherein the short-circuit test report may include information such as the test date and time and whether the fuse passes the test. In this embodiment, when it is detected that the fuse is blown, the first switch and the second switch are disconnected by the controller, and the short-circuit test device can quickly respond to the disconnection signal, and automatically generate a short-circuit test report based on the short-circuit test results, thereby avoiding human errors when manually filling out the report and improving the accuracy and efficiency of the short-circuit test.

[0037] The short-circuit test method of the vehicle insurance harness provided by the embodiment of the present invention obtains the current data of the short-circuit test circuit and the temperature data of the fuse in response to the closing signal of the first switch and the second switch, and then analyzes the current data and the temperature data to determine the short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test, and then generates a short-circuit test report according to the short-circuit test result in response to the disconnection signal of the first switch and the second switch. The embodiment of the present invention controls the on and off of the short-circuit test circuit by responding to the first switch connected to the fuse and responding to the second switch connected to the relay, so as to provide an electrical signal to control the collection of current data and the temperature data of the fuse and analyze them, determine the short-circuit test result of the fuse and generate a test report, which can quickly and accurately analyze whether the impact on the vehicle insurance harness during the short-circuit test is safe, and improve the working efficiency of the vehicle short-circuit test.

[0038] See also Figure 3 As shown, in the short-circuit test method of the vehicle insurance harness provided by some embodiments of the present invention, Figure 2 The current data and the temperature data are analyzed in step S200 to determine the short circuit test result of the fuse, including but not limited to the following steps S210 and S230: Step S210, analyzing the current data to determine whether the fuse meets the preset current value requirement.

[0039] Step S220, analyzing the temperature data to determine whether the temperature of the fuse meets the preset temperature value requirement.

[0040] Step S230, determining the short-circuit test result of the fuse according to the judgment result of the preset current value requirement and the judgment result of the preset temperature value requirement.

[0041] It should be noted that when analyzing the current data and temperature data, they can be compared with the preset current value requirements and the preset temperature value requirements, and then based on the judgment results of the current data and the preset current value requirements, and based on the judgment results of the temperature data and the preset temperature value requirements, it is judged whether the fuse has passed the short-circuit test, and the short-circuit test result of the fuse is determined. For example, if the fuse meets the preset current value requirements and the preset temperature value requirements in the short-circuit test, the fuse passes the short-circuit test. In one embodiment, the preset current value requirements can be requirements for the maximum short-circuit current passing through the fuse and requirements for the fuse blowing time, etc. For example, the fuse meeting the preset current value requirements can be that the fuse should blow after the current passing through the fuse exceeds the maximum short-circuit current. In another embodiment, the preset temperature value requirements can be requirements for the maximum tolerable temperature of the fuse and the load, etc. The specific requirements can be set in advance by the technician.

[0042] See also Figure 4 As shown, Figure 4 yes Figure 3 The specific flow chart of step S210 in Figure 4 In the example of step S210, the current data is analyzed to determine whether the fuse meets the preset current value requirement, including but not limited to the following steps S211 to S214: Step S211 : obtaining a current time series by calculation according to the current data, wherein the current time series includes a plurality of continuously recorded current sampling time points and their corresponding sampled current values.

[0043] Step S212, determining the short-circuit duration of the fuse according to the current time series.

[0044] Step S213, calculating the average short-circuit current within the short-circuit duration according to the current time series and the short-circuit duration.

[0045] Step S214, judging whether the fuse meets the preset current value requirement according to the average short-circuit current value and the short-circuit duration.

[0046] It is understandable that a current time series can be calculated from the current data, which includes a plurality of continuously recorded current sampling time points and their corresponding sampled current values. For example, the current time series can be a set constructed based on the current sampling time points and their corresponding sampled current values, such as Figure 5As shown, the current time series can also be represented by a short-circuit test current-time relationship curve. Further, the short-circuit duration of the fuse is determined according to the current time series. The short-circuit duration is a time period from the start of the short-circuit test to the fuse blowing. After determining the current time series and the short-circuit duration, the average short-circuit current of the fuse in this time period can be calculated. For example, the average value of all sampled current values ​​in the short-circuit duration can be calculated by an integration method to obtain the average value of the short-circuit current. Finally, according to the short-circuit current average value and the short-circuit duration, it can be determined whether the fuse meets the preset current value requirements.

[0047] In one embodiment, Figure 4 Step S212 determines the short-circuit duration of the fuse according to the current time series, including but not limited to the following steps S2121 to S2125: Step S2121, traverse the current time series to obtain the maximum current value and the minimum current value, and calculate the current characteristic threshold value according to the maximum current value and the minimum current value.

[0048] Step S2122: Compare each sampled current value in the current time series with the current characteristic threshold in turn to determine at least one first sampled current value and at least one second sampled current value, wherein the first sampled current value is the first sampled current value greater than the current characteristic threshold and the sampling time of the first sampled current value is before the current maximum value, and the second sampled current value is the first sampled current value less than the current characteristic threshold and the sampling time of the second sampled current value is after the current maximum value.

[0049] Step S2123, determining the short circuit start time according to the first current sampling time point of the first sampled current value.

[0050] Step S2124, determining the short circuit end time according to the second current sampling time point of the second sampled current value.

[0051] Step S2125, calculating the short circuit duration of the fuse according to the short circuit start time and the short circuit end time.

[0052] It can be understood that to determine the short-circuit duration of the fuse from the current time series, first traverse the entire current time series, record the sampled current value at each current sampling time point, and find and record the maximum current value and the minimum current value during the traversal process. Then, the current characteristic threshold is calculated using the maximum current value and the minimum current value. In one embodiment, the current characteristic threshold can be the average value of the maximum current value and the minimum current value, which is processed according to the following calculation method:

[0053] Where I0 is the current characteristic threshold, I min is the minimum current, Imax It is the maximum current value. It should be noted that the current characteristic threshold can help identify abnormal changes in current. At the beginning of a short circuit, the current increases sharply. The current value during a short circuit will exceed the current characteristic threshold and quickly rise to a maximum current value. After that, the current value will drop below the current characteristic threshold and stabilize, at which point the short circuit ends.

[0054] Furthermore, by comparing each sampled current value in the current time series with the current characteristic threshold I0 in turn, the first current value greater than the current characteristic threshold I0 and whose sampling time is within the current maximum value I0 is determined from the current time series. max The previous sampled current value can be used as the first sampled current value I1, and the first sampled current value less than the current characteristic threshold I0 and the sampling time is within the current maximum value I max The next sampled current value can be used as the second sampled current value I2. When the current value rises for the first time and exceeds the current characteristic threshold value I0, it indicates that the short circuit has begun. Then, according to the first current sampling time point t1 corresponding to the first sampled current value I1, the time point when the first current value exceeds the current characteristic threshold value I0 can be found, that is, the first current sampling time point t1 can be used as the short circuit start time T start . And when the current value changes from the maximum current I max When the current drops and falls below the current characteristic threshold I0 for the first time, it indicates that the short circuit has ended. Then, according to the second current sampling time point t2 corresponding to the second sampled current value I2, the second current sampling time point t2 can be determined as the short circuit end time T end Finally, according to the short circuit start time T start And short circuit end time T end , subtract the difference between the short circuit end time and the short circuit start time to calculate the short circuit duration T of the fuse, that is, T = T end -T start .

[0055] In one embodiment, Figure 4 Step S214 determines whether the fuse meets the preset current value requirement according to the average short-circuit current value and the short-circuit duration, and may include the following steps: Step S2141, compare the short-circuit current average value with the rated current value and the preset ratio value, and compare the short-circuit duration with the preset duration. If the short-circuit current average value is greater than the product of the rated current value and the preset ratio value, and the short-circuit duration is less than the preset duration or within the preset duration range, it is determined that the fuse meets the preset current value requirements.

[0056] In the embodiment of this step, if the rated current value of the fuse is 10A and the preset ratio value is set to 150%, the product of multiplying the two is the expected short-circuit current threshold of 15A, and then the average short-circuit current is compared with the short-circuit current threshold. If it is greater than, it is further judged whether the fuse meets the preset current value requirement based on the short-circuit duration. Specifically, the preset duration or the preset duration range can be set to 20s. If the short-circuit duration of the fuse is less than 20s, it means that the fuse is disconnected within 20s, and the fuse meets the preset current value requirement.

[0057] In another embodiment, step S214 of the above embodiment further includes the following steps: Step S2142: If the average short-circuit current is less than the product of the rated current value and the preset ratio value, or the short-circuit duration is greater than the preset duration or exceeds the preset duration range, it is determined that the fuse does not meet the preset current value requirement.

[0058] In the embodiment of this step, according to the product of the short-circuit current average value and the rated current value set in the above step S2141 embodiment and the preset ratio value, that is, by comparing the short-circuit current average value and the short-circuit current threshold 15A, if the short-circuit current average value is less than 15A and the fuse is not disconnected within 20s, the fuse does not meet the preset current value requirement.

[0059] In one embodiment, the temperature data of any of the above step embodiments includes a first temperature value and a second temperature value. Figure 3 The step S220 of analyzing the temperature data to determine whether the temperature of the fuse meets the preset temperature value requirement includes the following steps: Step S221, when the difference between the first temperature value and the second temperature value is less than the preset temperature value or within the preset temperature value range, it is judged that the fuse meets the preset temperature value requirement; when the difference between the first temperature value and the second temperature value is greater than the preset temperature value or exceeds the preset temperature value range, it is judged that the fuse does not meet the preset temperature value requirement, wherein the first temperature value is the initial temperature recorded at the beginning of the short circuit test, and the second temperature value is the highest temperature recorded during the short circuit test.

[0060] In the embodiment of this step, the temperature change of the distribution box and the load can be monitored according to the temperature data during the short-circuit test of the vehicle fuse harness, wherein the distribution box is provided with a fuse, so as to help evaluate the thermal stability of the fuse harness under short-circuit conditions. Specifically, the initial temperature of the fuse at the beginning of the short-circuit test and the highest temperature of the fuse during the short-circuit test, i.e., the first temperature value and the second temperature value, can be obtained, and then the difference between the first temperature value and the second temperature value is calculated and compared with the preset temperature value. When the difference is less than the preset temperature value or the difference is within the preset temperature value range, the fuse meets the preset temperature value requirement. If the difference is greater than the preset temperature value or exceeds the preset temperature value range, the fuse does not meet the preset temperature value requirement.

[0061] In one embodiment, in response to the closing signals of the first switch and the second switch, obtaining the current data of the short circuit test circuit and the temperature data of the fuse in step S100 may include the following steps S110 to S120: Step S110 , in response to the closing signals of the first switch and the second switch, a current sensor is used to collect a current signal of the short-circuit test circuit, and a temperature sensor is used to collect a temperature signal of the fuse.

[0062] Step S120 , integrating and encoding the current signal and the temperature signal to obtain current data of the short-circuit test circuit and temperature data of the fuse.

[0063] It is understandable that during the short-circuit test of the vehicle fuse harness, the short-circuit test procedure is started when the first switch and the second switch are closed, and the current signal of the short-circuit test circuit can be collected by the current sensor, and the temperature signal of the fuse can be collected by the temperature sensor. Among them, the current signal and the temperature signal are analog signals output by the current sensor and the temperature sensor after converting the collected physical signals, that is, the sensor outputs a voltage analog signal corresponding to the current signal and the temperature signal.

[0064] Furthermore, the short-circuit test device of the embodiment of the present invention may also include a digital data collector. Specifically, the digital data collector can integrate and encode the voltage analog signals corresponding to the current signals and temperature signals output by the multi-channel sensors, and then upload them to the signal acquisition software. In the signal acquisition software, the integrated voltage analog signals are analyzed to obtain multi-channel signals, and are decoded into digital signals respectively, so as to obtain data corresponding to the digital signals as the current data of the short-circuit test circuit and the temperature data of the fuse.

[0065] In one embodiment, the digital data collector can also store the decoded digital signal to generate current data and temperature data document files to ensure the accuracy and integrity of the collected original data, which is convenient for subsequent analysis.

[0066] In one embodiment, the short-circuit test method of the vehicle insurance harness of the embodiment of the present invention also includes: obtaining voltage data of the DC power supply in response to the closing signal of the first switch and the second switch; analyzing the voltage data to determine whether the voltage of the DC power supply is lower than a preset voltage value; if the voltage of the DC power supply is lower than the preset voltage value, outputting a prompt message, wherein the prompt message is used to indicate charging or replacing the DC power supply.

[0067] It is understandable that when the first switch and the second switch are closed, the short-circuit test program is started, and the voltage data of the DC power supply can also be obtained in real time through the voltage sensor connected to the two sides of the DC power supply. Specifically, the DC power supply of the embodiment of the present invention can be a battery. During the short-circuit test, the voltage of the battery should be maintained at 12.5V normally. When the number of fuses connected to the short-circuit test circuit is large, the battery will be continuously short-circuited and discharged, and the power consumption of the test increases, resulting in a decrease in the battery voltage. Therefore, it can be determined whether the voltage of the battery is lower than the preset voltage value based on the voltage data. For example, the preset voltage value can be set to 12V in advance. If the voltage of the battery is lower than the preset voltage value, a prompt message is output to instruct the technician to suspend the test and charge the battery, or continue the test after replacing the battery. For example, the short-circuit test device can be used to output the prompt message in the form of light, sound signal, and display text. In one embodiment, the method of obtaining the voltage data can be specifically to integrate and encode the voltage signal output by the voltage sensor with the current signal and the temperature signal through a digital acquisition instrument and upload them to the signal acquisition software, and decode them in the signal acquisition software to obtain digital signals, thereby obtaining the voltage data corresponding to the digital signal.

[0068] In one embodiment, in response to the disconnection signals of the first switch and the second switch, generating a short circuit test report according to the short circuit test result in step S300 may include the following steps S310 to S320: Step S310, in response to the disconnection signals of the first switch and the second switch, stop recording the current data of the short circuit test circuit and the temperature data of the fuse, and obtain the property information of the fuse, wherein the property information of the fuse includes the type and installation position of the fuse.

[0069] Step S320, associating the short-circuit test result, the current data of the short-circuit test circuit, the temperature data of the fuse and the property information of the fuse to generate a short-circuit test report.

[0070] It should be noted that the short-circuit test device can terminate the short-circuit test program and save data after the fuse blows, specifically by responding to the disconnection signal of the first switch and the second switch. When the first switch and the second switch are disconnected, the short-circuit test program is terminated, and then the current data of the short-circuit test circuit and the temperature data of the fuse are stopped from being recorded, and the attribute information of the fuse is obtained. Then, the determined short-circuit test results and the measured short-circuit test data are verified and associated with the attribute information of the fuse, and a corresponding short-circuit test report can be automatically generated to record the data and test results collected during the short-circuit test. For example, the short-circuit test report can record the fuse type, installation location, and test time. The recorded current data of the short-circuit test circuit can include the average short-circuit current and the peak short-circuit current. The recorded temperature data of the fuse includes the temperature at the start of the test, the highest test temperature, the temperature rise, and whether the fuse passes the test. This can avoid human errors when manually filling out reports and improve the accuracy and work efficiency of short-circuit testing.

[0071] See also Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a short-circuit test device for a vehicle insurance harness according to an embodiment of the second aspect of the present invention. The short-circuit test device 600 is suitable for executing a short-circuit test method for a vehicle insurance harness according to an embodiment of the present invention. Figure 6 As shown, the short circuit test device 600 includes: a collection module 610, an analysis module 620 and an output module 630, wherein: The acquisition module 610 is used to acquire the current data of the short-circuit test circuit and the temperature data of the fuse in response to the closing signals of the first switch and the second switch; An analysis module 620 is used to analyze the current data and the temperature data to determine a short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test; The output module 630 is used to generate a short-circuit test report according to the short-circuit test result in response to the disconnection signal of the first switch and the second switch.

[0072] The short-circuit test device for a vehicle insurance harness provided in an embodiment of the present invention controls the on and off of a short-circuit test circuit by responding to a first switch connected to a fuse and a second switch connected to a relay, so as to provide an electrical signal to control the collection and analysis of current data and temperature data of the fuse, determine the short-circuit test result of the fuse and generate a test report, and can quickly and accurately analyze whether the impact on the vehicle insurance harness during the short-circuit test is safe, and improve the work efficiency of the vehicle short-circuit test.

[0073] The short-circuit test device for vehicle insurance harness provided in the embodiment of the present invention can execute the short-circuit test method for vehicle insurance harness provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. The contents not described in detail in this embodiment can refer to the description in any method embodiment of the present invention.

[0074] See also Figure 7 As shown, Figure 7 1 is a schematic diagram of a structure of an electronic device provided by an embodiment of the third aspect of the present invention. Figure 7 , which shows a schematic diagram of the structure of a computer system 12 of an electronic device suitable for implementing an embodiment of the present invention. Figure 7 The electronic device shown is only an example and should not limit the functionality and scope of use of the embodiments of the present invention. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0075] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0076] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0077] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 7 not shown, usually called a "hard drive"). Although Figure 7Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0078] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0079] The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 12, and / or communicate with any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the electronic device 12 in this embodiment, the display 24 does not exist as an independent individual, but is embedded in the mirror surface, and when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface are visually integrated. In addition, the electronic device 12 may also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN) and / or public network, such as the Internet) through a network adapter 20. As shown in the figure, the network adapter 20 communicates with other modules of the electronic device 12 through a bus 18. It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0080] The processing unit 16 executes various functional applications and steering system tests by running the programs stored in the system memory 28, for example, implementing a short-circuit test method for a vehicle insurance harness provided by an embodiment of the present invention.

[0081] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, a short-circuit test method for a vehicle insurance harness provided by all embodiments of the present invention is implemented, and any combination of one or more computer-readable media can be used. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0082] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0083] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0084] In a fifth aspect, an embodiment of the present invention further provides a computer program product, the computer program product comprising a computer program, the computer program being stored in a computer-readable storage medium. A processor of a computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the computer device executes the short-circuit test method for a vehicle insurance harness implementing any one of the above embodiments.

[0085] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0086] It will be appreciated by those skilled in the art that all or some of the steps and systems in the method disclosed 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 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 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 storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk 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.

[0087] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A short circuit test method for a vehicle insurance harness, characterized in that: A short circuit test device is applied to be connected to a short circuit test circuit of a vehicle insurance harness, wherein the vehicle insurance harness comprises a fuse, a relay, a controller harness, a short circuit piece and a ground harness connected in sequence; a pair of contacts of the relay are respectively connected to the fuse and the controller harness; the short circuit test circuit comprises a DC power supply, a first switch and a second switch, wherein the first switch is connected between the positive pole of the DC power supply and the fuse, the second switch is connected between the positive pole of the DC power supply and one end of a coil of the relay, the other end of the coil of the relay and the ground harness are both connected to the negative pole of the DC power supply, and the method comprises: In response to closing signals of the first switch and the second switch, acquiring current data of the short-circuit test circuit and temperature data of the fuse; Analyzing the current data and the temperature data to determine a short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test; In response to the disconnection signals of the first switch and the second switch, a short circuit test report is generated according to the short circuit test result.

2. The method according to claim 1, characterized in that The analyzing the current data and the temperature data to determine the short-circuit test result of the fuse includes: Analyzing the current data to determine whether the fuse meets the preset current value requirement; Analyze the temperature data to determine whether the temperature of the fuse meets the preset temperature value requirement; The short-circuit test result of the fuse is determined according to the judgment result of the preset current value requirement and the judgment result of the preset temperature value requirement.

3. The method according to claim 2, characterized in that The analyzing the current data to determine whether the fuse meets the preset current value requirement includes: A current time series is calculated based on the current data, wherein the current time series includes a plurality of continuously recorded current sampling time points and their corresponding sampling current values; Determining the short-circuit duration of the fuse according to the current time series; Calculating the short-circuit current average value within the short-circuit duration according to the current time series and the short-circuit duration; Whether the fuse meets the preset current value requirement is determined according to the short-circuit current average value and the short-circuit duration.

4. The method according to claim 3, characterized in that The determining the short-circuit duration of the fuse according to the current time series includes: Traversing the current time series to obtain a current maximum value and a current minimum value, and calculating a current characteristic threshold value according to the current maximum value and the current minimum value; Compare each of the sampled current values ​​in the current time series with the current characteristic threshold in sequence to determine at least one first sampled current value and at least one second sampled current value, wherein the first sampled current value is the first sampled current value greater than the current characteristic threshold and the sampling time of the first sampled current value is before the current maximum value, and the second sampled current value is the first sampled current value less than the current characteristic threshold and the sampling time of the second sampled current value is after the current maximum value; Determining a short circuit start time according to a first current sampling time point of the first sampled current value; Determining a short circuit end time according to a second current sampling time point of the second sampled current value; The short circuit duration of the fuse is calculated according to the short circuit start time and the short circuit end time.

5. The method according to claim 3, characterized in that: The step of judging whether the fuse meets the preset current value requirement according to the short-circuit current average value and the short-circuit duration includes: The short-circuit current average value is compared with the rated current value and the preset ratio value, and the short-circuit duration is compared with the preset duration. If the short-circuit current average value is greater than the product of the rated current value and the preset ratio value, and the short-circuit duration is less than the preset duration or is within the preset duration range, it is determined that the fuse meets the preset current value requirement.

6. The method according to claim 5, characterized in that The method further comprises: If the short-circuit current average value is less than the product of the rated current value and the preset ratio value, or the short-circuit duration is greater than the preset duration or exceeds the preset duration range, it is determined that the fuse does not meet the preset current value requirement.

7. The method according to claim 2, characterized in that The temperature data includes a first temperature value and a second temperature value, and the analyzing the temperature data to determine whether the temperature of the fuse meets the preset temperature value requirement includes: When the difference between the first temperature value and the second temperature value is less than the preset temperature value or within the preset temperature value range, the fuse is judged to meet the preset temperature value requirement; when the difference between the first temperature value and the second temperature value is greater than the preset temperature value or exceeds the preset temperature value range, the fuse is judged to not meet the preset temperature value requirement, wherein the first temperature value is the initial temperature recorded at the beginning of the short circuit test, and the second temperature value is the highest temperature recorded during the short circuit test.

8. The method according to claim 1, characterized in that The short circuit test circuit further includes a current sensor and a temperature sensor, and the current data of the short circuit test circuit and the temperature data of the fuse are obtained in response to the closing signals of the first switch and the second switch, including: In response to the closing signals of the first switch and the second switch, acquiring the current analog signal of the short-circuit test circuit collected by the current sensor, and acquiring the temperature analog signal of the fuse collected by the temperature sensor; The current data of the short-circuit test circuit and the temperature data of the fuse are obtained by integrating and encoding the current simulation signal and the temperature simulation signal.

9. A short circuit test device for a vehicle insurance harness, characterized in that: The vehicle insurance harness comprises a fuse, a relay, a controller harness, a short-circuit piece and a ground harness which are connected in sequence; a pair of contacts of the relay are respectively connected to the fuse and the controller harness; the short-circuit test circuit comprises a DC power supply, a first switch and a second switch, the first switch is connected between the positive pole of the DC power supply and the fuse, the second switch is connected between the positive pole of the DC power supply and one end of the coil of the relay, the other end of the coil of the relay and the ground harness are both connected to the negative pole of the DC power supply, and the device comprises: an acquisition module, configured to acquire current data of the short-circuit test circuit and temperature data of the fuse in response to closing signals of the first switch and the second switch; An analysis module, configured to analyze the current data and the temperature data to determine a short-circuit test result of the fuse, wherein the short-circuit test result includes whether the fuse passes the test; An output module is used to generate a short-circuit test report according to the short-circuit test result in response to the disconnection signals of the first switch and the second switch.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores 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 short-circuit test method for the vehicle insurance wiring harness according to any one of claims 1 to 8.

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