A general test device and method for a multi-channel redundant power module of an internal combustion engine vehicle

Abstract

The application discloses a kind of test methods of multiple-channel redundant power module of internal combustion locomotive, comprising: signal conditioning module for the load of power module to be tested is half load, full load, overcurrent protection and load mutation conditioning;Relay matrix module;First measuring instrument for measuring the voltage and resistance of power module to be tested;Second measuring instrument for obtaining the output voltage waveform and voltage phase difference of power module to be tested;Relay X0, program-controlled power supply, industrial computer.The application can simultaneously carry out multiple-channel test to multiple-channel power module, so that test point of experiment table is comprehensive, and operation is simple, test device site space occupancy is low, equipment maintenance is simple and convenient;Easy to maintain and function expansion, with high utilization, convenient operation, cheap, site space occupancy is low, equipment management workload is small advantage, can satisfy the requirement of multiple-channel redundant power module automatic test of multiple locomotives.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a testing method for a multi-channel redundant power module of an internal combustion locomotive. BACKGROUND

[0002] The power module is the core of the power supply of the microcomputer control system of the internal combustion locomotive, and is generally installed in a power supply case. The main function is to convert voltage to power supply for vehicle-mounted microcomputers, display screens, sensors and other vehicle-mounted network devices, and also has functions such as voltage stabilization, filtering, overcurrent protection, overvoltage protection, and undervoltage protection.

[0003] The general testing device for the power module of the internal combustion locomotive is used to detect the functions and performance indicators of the power module and determine the technical state of the power module, and plays an important role in the maintenance and manufacturing industry of the power module of the internal combustion locomotive. The existing testing device for the power module of the locomotive is basically designed for a single channel or two-channel locomotive power module, and has the disadvantages of incomplete test points, low utilization rate, and inconvenient operation. The testing device that can test various locomotive power modules and comprehensively covers the testing device also has the disadvantages of high price, high space occupancy rate, and large equipment management workload. SUMMARY

[0004] The present application provides a testing method for a multi-channel redundant power module of an internal combustion locomotive to overcome the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A general testing device for a multi-channel redundant power module of an internal combustion locomotive, comprising a plurality of power modules to be tested, comprising: a plurality of signal conditioning modules, a relay matrix module, a first measuring instrument, a second measuring instrument, a relay X0, a program-controlled power supply and an industrial computer.

[0007] The signal conditioning module is used to condition the load of the power module to be tested in half load, full load, overcurrent protection and load mutation;

[0008] The relay matrix module is used to control the on-off of the power module to be tested and the first measuring instrument and the power module to be tested and the second measuring instrument;

[0009] The first measuring instrument is used to measure the voltage and resistance of the power module to be tested;

[0010] The second measuring instrument is used to obtain the output voltage waveform and voltage phase difference of the power module to be tested;

[0011] The relay X0 is used to control the on-off between the input end of the power module to be tested and the program-controlled power supply;

[0012] The program-controlled power supply is used for supplying power to the industrial computer and the power supply module to be tested.

[0013] The industrial computer is used for receiving signals of the first measuring instrument and the second measuring instrument, and sending a test signal to the signal conditioning module to realize testing on the power supply module to be tested.

[0014] Further, the signal conditioning module comprises a first fixed resistor, a second fixed resistor, an electronic load, a short circuit module and a high-speed load switching module; the high-speed load switching module comprises a first high-speed load switching circuit A1, a second high-speed load switching circuit A2, a third high-speed load switching circuit A3 and a fourth high-speed load switching circuit A4.

[0015] The first fixed resistor is connected with an output end of the first high-speed load switching circuit A1; the second fixed resistor is connected with an output end of the second high-speed load switching circuit A2.

[0016] The short circuit module is connected with an output end of the fourth high-speed load switching circuit A4.

[0017] The electronic load is connected with an output end of the third high-speed load switching circuit A3.

[0018] An input end of the first high-speed load switching circuit A1, an input end of the second high-speed load switching circuit A2, an input end of the third high-speed load switching circuit A3 and an input end of the fourth high-speed load switching circuit A4 are all connected with an output end of the power supply module to be tested.

[0019] Further, an I / O module is further included.

[0020] The relay X0, the relay matrix module, the first fixed resistor, the second fixed resistor and the short circuit module are all connected with the industrial computer through the I / O module.

[0021] Further, the signal conditioning module further comprises a plurality of interfaces of devices to be tested.

[0022] The output end of the power supply module to be tested is connected with the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 through the interfaces of devices to be tested respectively.

[0023] Further, the first high-speed load switching circuit A1, the second high-speed load switching circuit A2, the third high-speed load switching circuit A3 and the fourth high-speed load switching circuit A4 have the same circuit structure, comprising a buffer, an inverter, an optoelectronic coupler, a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a field effect transistor.

[0024] The output end of the power module to be tested is connected with one end of the second resistor R2; the other end of the second resistor R2 is connected with the third resistor R3; the steady voltage diode Z1 is connected with the second resistor R2 in parallel;

[0025] Pin 1 of the field effect transistor is connected with the output end of the power module to be tested, pin 3 of the field effect transistor is connected at the connection of the second resistor R2 and the third resistor R3, and pin 2 of the field effect transistor is connected with the first resistor R1; the other end of the first resistor R1 is connected with the first constant resistor / second constant resistor / short circuit module / electronic load;

[0026] The other end of the third resistor R3 is connected with pin 1 of the photoelectric coupler; pin 2 of the photoelectric coupler is connected with low level; pin 4 of the photoelectric coupler is grounded; pin 3 of the photoelectric coupler is connected with the inverter; the other end of the inverter is connected with the buffer, and the other end of the buffer is connected with the I / O module;

[0027] Pin 2 of the field effect transistor is connected with pin 1 of the comparator at the connection of the first resistor R1; pin 2 of the comparator is connected with the I / O module;

[0028] Pin 3 of the comparator is connected with the fourth resistor R4, and the other end of the fourth resistor R4 is connected with high level; the connection of pin 3 of the comparator and the fourth resistor R4 is connected with the I / O module.

[0029] A testing method of a universal testing device of a multi-channel redundant power module of an internal combustion engine vehicle, comprising the following steps:

[0030] S1: recording the model, number, operator name and test time of the power module to be tested in the industrial computer;

[0031] S2: reading the first resistance value of the input end of the power module to be tested by the first measuring instrument; if the first resistance value is greater than the first resistance threshold value, executing S3, otherwise, ending the test;

[0032] S3: reading the second resistance value of the output end of the power module to be tested by the first measuring instrument; if the second resistance value is less than the second resistance threshold value, executing S4, otherwise, ending the test;

[0033] S4: setting a first protection current threshold on the first high-speed load switching circuit A1; setting an output voltage and a first output current value of the program-controlled power supply, and connecting the first fixed-value resistor to the first high-speed load switching circuit A1, connecting the input end of the power supply to be tested to the program-controlled power supply, if the first high-speed load switching circuit A1 outputs high level, then disconnecting the program-controlled power supply, and ending the test; otherwise, performing S5;

[0034] S5: reading a first voltage value of the power supply to be tested by the first measuring instrument, if the error between the first voltage value and the nominal voltage value of the power supply to be tested is less than or equal to a first voltage error threshold, then performing S6, otherwise ending the test;

[0035] S6: performing under-voltage test, over-voltage test and reverse connection protection test on the power supply to be tested;

[0036] S7: setting a second protection current threshold on the second high-speed load switching circuit A2; setting a second output current value of the program-controlled power supply, and connecting the second fixed-value resistor to the second high-speed load switching circuit A2, if the second high-speed load switching circuit A2 outputs high level, then disconnecting the program-controlled power supply, and ending the test; otherwise, performing S8;

[0037] S8: reading a second voltage value of the power supply to be tested by the first measuring instrument, if the error between the second voltage value and the nominal voltage value of the power supply to be tested is less than or equal to a second voltage error threshold, then performing S9, otherwise ending the test;

[0038] S9: performing full-load test and power supply efficiency test on the power supply to be tested;

[0039] S10: connecting the second measuring instrument to the input end of the power supply to be tested by the relay matrix module, and performing ripple and noise test, module power-on delay time test, power-on rise time test, power-off holding time test and power-on overshoot test on the power supply to be tested;

[0040] S11: setting a third protection current threshold on the third high-speed load switching circuit A3; and connecting the electronic load to the third high-speed load switching circuit A3, if the third high-speed load switching circuit A3 outputs high level, then disconnecting the program-controlled power supply, and ending the test; otherwise, performing S12;

[0041] S12: setting a fourth current value through the electronic load, and performing over-current protection test and load mutation test on the power supply to be tested; and performing S13;

[0042] S13: set the fourth protection current threshold value on the fourth high-speed load switching circuit A4; and connect the short circuit module to the fourth high-speed load switching circuit A4, if the fourth high-speed load switching circuit A4 outputs high level, disconnect the program-controlled power supply, and the test is finished; otherwise, execute S14;

[0043] S14: read the third voltage value of the power supply module to be tested by the first measuring instrument, if the error between the third voltage value and the nominal voltage value of the power supply module to be tested is less than or equal to the third voltage error threshold value, the power supply module to be tested is fault-free, otherwise, the power supply module to be tested has a fault;

[0044] S15: output the test report according to S1-S14.

[0045] Beneficial effects: the test method of the internal combustion engine vehicle multi-channel redundant power supply module can simultaneously perform multi-channel test on the power supply modules of multiple channels by setting a plurality of signal conditioning modules, the experimental bench test points are comprehensive by setting the high-speed load switching module, and the operation is simple, the test device occupies a low space, the equipment maintenance is simple and convenient, and the test device has the advantages of high utilization rate, convenient operation, low price, low space occupancy, and small equipment management workload, and can meet the requirements of multi-channel redundant power supply module automatic test of various vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0047] Fig. 1 It is a schematic diagram of the test device of the present application;

[0048] Fig. 2 It is a schematic diagram of the high-speed load switching circuit of the present application;

[0049] Fig. 3 It is a schematic diagram of the input and output voltage acquisition circuit of the power supply module to be tested of the present application. DETAILED DESCRIPTION

[0050] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0051] The embodiment provides a universal test device for a multi-channel redundant power module of an internal combustion locomotive, which comprises a plurality of power modules to be tested, a plurality of signal conditioning modules, a relay matrix module, an electronic load, a multimeter, an oscilloscope, a program-controlled power supply and an industrial computer, and further comprises an I / O module. Figs. 1-3 The signal conditioning module is used for conditioning half-load, full-load, over-current protection and load mutation of the load of the power module to be tested.

[0052] The signal conditioning module is used for conditioning half-load, full-load, over-current protection and load mutation of the load of the power module to be tested.

[0053] Specifically, the signal conditioning module comprises a first fixed resistor, a second fixed resistor, a short-circuit module and a high-speed load switching module; the high-speed load switching module comprises a first high-speed load switching circuit A1, a second high-speed load switching circuit A2, a third high-speed load switching circuit A3 and a fourth high-speed load switching circuit A4.

[0054] The first fixed resistor is connected with the output end of the first high-speed load switching circuit A1; and the second fixed resistor is connected with the output end of the second high-speed load switching circuit A2.

[0055] The short-circuit module is connected with the output end of the fourth high-speed load switching circuit A4; the short-circuit module is a module capable of short-circuiting the connected circuit, and in the embodiment, is a common wire.

[0056] The electronic load is connected with the output end of the third high-speed load switching circuit A3.

[0057] The input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 are all connected with the output end of the power module to be tested.

[0058] The relay matrix module is used for controlling the on-off of the power module to be tested and the first measuring instrument and the on-off of the power module to be tested and the second measuring instrument; the first measuring instrument is used for measuring the voltage and resistance of the power module to be tested; and the second measuring instrument is used for acquiring the output voltage waveform and voltage phase difference of the power module to be tested.

[0059] Specifically, the output ends of the relay matrix module are connected with the multimeter and the oscilloscope respectively; the output end of the power supply module to be tested is connected with the input end of the relay matrix module; the first measuring instrument in the embodiment is a multimeter, and the second measuring instrument is an oscilloscope;

[0060] The relay X0 is used for controlling the on-off of the input end of the power supply module to be tested and the program-controlled power supply.

[0061] Specifically, the input end of the power supply module to be tested is connected with the relay matrix module and the relay X0 respectively; the other end of the relay X0 is connected with the program-controlled power supply and the I / O module respectively.

[0062] The program-controlled power supply is used for supplying power to the industrial computer and the power supply module to be tested; the industrial computer is used for receiving the signals of the first measuring instrument and the second measuring instrument, and sending a test signal to the signal conditioning module, so as to realize the testing of the power supply module to be tested.

[0063] Specifically, the electronic load, the multimeter, the oscilloscope, the program-controlled power supply and the I / O module are connected with the industrial computer. The industrial computer in the embodiment is a common computer. The relay X0, the relay matrix module, the first fixed resistor, the second fixed resistor and the short circuit module are connected with the industrial computer through the I / O module.

[0064] Preferably, the signal conditioning module further comprises a plurality of interfaces of components to be tested; the output end of the power supply module to be tested is connected with the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 through the interfaces of components to be tested respectively.

[0065] Preferably, the first high-speed load switching circuit A1, the second high-speed load switching circuit A2, the third high-speed load switching circuit A3 and the fourth high-speed load switching circuit A4 have the same circuit structure, comprising: a buffer, an inverter, an optoelectronic coupler, a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a field effect transistor.

[0066] The output end of the power supply module to be tested is connected with one end of the second resistor R2; the other end of the second resistor R2 is connected with the third resistor R3; the zener diode Z1 is connected with the second resistor R2 in parallel.

[0067] Pin 1 of the field effect transistor is connected with the output end of the power module to be tested, pin 3 of the field effect transistor is connected at the connection of the second resistor R2 and the third resistor R3, and pin 2 of the field effect transistor is connected with the first resistor R1; the other end of the first resistor R1 is connected with the first constant resistor / second constant resistor / short circuit module / electronic load;

[0068] The other end of the third resistor R3 is connected with pin 1 of the photoelectric coupler; pin 2 of the photoelectric coupler is connected with low level; pin 4 of the photoelectric coupler is grounded; pin 3 of the photoelectric coupler is connected with the inverter; the other end of the inverter is connected with the buffer, and the other end of the buffer is connected with the I / O module;

[0069] Pin 2 of the field effect transistor is connected at the connection of the first resistor R1, and pin 1 of the comparator is connected with the I / O module;

[0070] Pin 3 of the comparator is connected with the fourth resistor R4, the other end of the fourth resistor R4 is connected with high level, and the connection of pin 3 of the comparator and the fourth resistor R4 is connected with the I / O module.

[0071] Specifically, the signal conditioning module is arranged in two 4U standard cabinets, which are signal conditioning cabinet 1 and signal conditioning cabinet 2; the high-speed load switching module is arranged in the signal conditioning cabinet 1, and the constant resistor and the short circuit module are arranged in the signal conditioning cabinet 2; the constant resistor and the high-speed load switching module are connected by a rectangular heavy load connector; the interface of the signal conditioning module to be tested is arranged on the signal conditioning cabinet 1; the power module to be tested is also connected with the signal conditioning cabinet 1 in the signal conditioning module through the rectangular heavy load connector. In this embodiment, the signal conditioning cabinet 1 contains 7 groups of high-speed load switching modules, which can simultaneously test 7 output ends of the power module to be tested; each group of high-speed load switching module includes 4 high-speed load switching circuits, and there are 28 high-speed load switching circuits in total, and correspondingly, the signal conditioning cabinet 2 contains 14 groups of constant resistors and cooling fan needles, which can be replaced according to different products to perform functional tests. The cooling fan needle can cool the constant resistor.

[0072] The high-speed load switching circuit in the high-speed load switching module is composed of a high-power field effect transistor, a photoelectric coupler, a comparator, a buffer and the like, which is used to replace the traditional mechanical relay for load switching, reduces the influence of the traditional contactor on the test result, and improves the switching speed; the module can also set the protection current, compare the protection current set by the computer with the actual test current, and avoid damage to the equipment and itself caused by the fault test product.

[0073] The industrial computer in the embodiment comprises a digital quantity output board card, a digital quantity acquisition board card, an analog quantity output board card, an analog quantity acquisition board card and a USB expansion board card integrated inside a case, and a display and a keyboard and mouse hung outside the cabinet.

[0074] The embodiment also discloses a test method of the universal test device of the multi-channel redundant power supply module of the diesel locomotive.

[0075] S1: inputting a model, a number, an operator name and a test time of a power supply module to be tested in the industrial computer;

[0076] S2: reading a first resistance value of an input end of the power supply module to be tested through a universal meter; if the first resistance value is greater than a first resistance threshold value, performing S3, otherwise, ending the test;

[0077] Specifically, in the embodiment, the computer controls X1.1 of the relay matrix module to be closed through a digital quantity I / 0 module, connects the input end of the module to be tested with the universal meter, sets the universal meter to an ohm scale through a serial interface, performs input impedance test on the module to be tested, reads the first resistance value, judges the relationship between the first resistance value and a first electronic threshold value, if the first resistance value is greater than 1kΩ (the first electronic threshold value), continues the test, otherwise, ends the test.

[0078] S3: reading a second resistance value of an output end of the power supply module to be tested through the universal meter; if the second resistance value is less than a second resistance threshold value, performing S4, otherwise, ending the test;

[0079] Specifically, in the embodiment, the computer controls X2.1-X8.1 of the relay matrix module to be closed through the digital quantity I / 0 module, connects the output end of the module to be tested with the universal meter, sets the universal meter to the ohm scale through the serial interface, performs input impedance test on the module to be tested, reads the second resistance value, judges the relationship between the second resistance value and a second electronic threshold value, if the first resistance value is less than 100Ω (the second electronic threshold value), continues the test, otherwise, ends the test.

[0080] S4: setting a first protection current threshold value on the first high-speed load switching circuit A1; setting an output voltage and a first output current value of the program-controlled power supply, and connecting the first fixed resistance to the first high-speed load switching circuit A1, connecting the input end of the power supply to be tested to the program-controlled power supply, if the first high-speed load switching circuit A1 (the connection between the pin 3 of the comparator and the fourth resistance R4) outputs a high level, disconnects the program-controlled power supply, and ends the test; otherwise, performing S5;

[0081] Specifically, in the embodiment, when the input level is greater than 3.3v, it is high level, otherwise it is low level; the first protection current threshold 30A between the pin 2 of the comparator of the first high-speed load switching circuit A1 and the I / O module is set by the industrial computer, the first fixed value resistor is connected to the first high-speed load switching circuit A1, so that the to-be-tested power supply is in a half-load state, the computer sets the program-controlled power supply voltage to 74VDC through the serial interface, the first output current value is 5A, the relay X0 is closed, the input end of the to-be-tested power supply is connected to the program-controlled power supply, if the pin 3 of the comparator of the first high-speed load switching circuit A1 and the fourth resistor R4 are connected to output high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S5 is executed;

[0082] S5: the first voltage value of the to-be-tested power supply module is read by the universal meter, if the error between the first voltage value and the nominal voltage value of the to-be-tested power supply module is less than or equal to the first voltage error threshold, S6 is executed, otherwise the test is ended;

[0083] Specifically, in the embodiment, the universal meter is adjusted to the voltage range, the first voltage value is read, if the error between the first voltage value and the nominal voltage value of the to-be-tested power supply module is less than or equal to the first voltage error threshold 5%, the test is continued; otherwise, the test is ended.

[0084] S6: the to-be-tested power supply module is subjected to an under-voltage test, an over-voltage test and a reverse connection protection test;

[0085] S7: a second protection current threshold on the second high-speed load switching circuit A2 is set; a second output current value of the program-controlled power supply is set, and the second fixed value resistor is connected to the second high-speed load switching circuit A2, if the second high-speed load switching circuit A2 outputs high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S8 is executed;

[0086] Specifically, in the embodiment, the second protection current threshold 30A between the pin 2 of the comparator of the second high-speed load switching circuit A2 and the I / O module is set by the industrial computer, the second fixed value resistor is connected to the second high-speed load switching circuit A2, so that the to-be-tested power supply is in a full-load state, the computer sets the program-controlled power supply voltage to 74VDC through the serial interface, the second output current value is 8A, if the pin 3 of the comparator of the second high-speed load switching circuit A2 and the fourth resistor R4 are connected to output high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S8 is executed;

[0087] S8: the second voltage value of the to-be-tested power supply module is read by the universal meter, if the error between the second voltage value and the nominal voltage value of the to-be-tested power supply module is less than or equal to the second voltage error threshold, S9 is executed, otherwise the test is ended;

[0088] Specifically, at this time, the second voltage value is read, if the error between the second voltage value and the nominal voltage value of the power module to be tested is less than or equal to the second voltage error threshold 5%, the test is continued; otherwise, the test is ended.

[0089] S9: full load test and power efficiency test are performed on the power module to be tested;

[0090] S10: the oscilloscope is connected to the input end of the power module to be tested through the relay matrix module, ripple and noise test, module boot delay time test, boot rise time test, shutdown hold time test and boot overshoot test are performed on the power module to be tested;

[0091] S11: a third protection current threshold value on the third high-speed load switching circuit A3 is set, the electronic load is connected to the third high-speed load switching circuit A3, if the third high-speed load switching circuit A3 outputs high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S12 is executed;

[0092] S12: a fourth current value passing through the electronic load is set, and overcurrent protection test and load mutation test are performed on the power module to be tested; S13 is continued to be executed;

[0093] Specifically, in the embodiment, the third protection current threshold value 60A between the pin 2 of the comparator of the third high-speed load switching circuit A3 and the I / 0 module is set through the industrial computer, the electronic load is connected to the third high-speed load switching circuit A3, if the pin 3 of the comparator of the third high-speed load switching circuit A3 and the fourth resistor R4 are connected to output high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, the test is continued; the current value of the electronic load is set through the serial interface of the computer, overcurrent protection test and load mutation test are performed on the power module to be tested;

[0094] S13: a fourth protection current threshold value on the fourth high-speed load switching circuit A4 is set, the short circuit module is connected to the fourth high-speed load switching circuit A4, if the fourth high-speed load switching circuit A4 outputs high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S14 is executed;

[0095] S14: the third voltage value of the power module to be tested is read through the multimeter, if the error between the third voltage value and the nominal voltage value of the power module to be tested is less than or equal to the third voltage error threshold, the power module to be tested is fault-free, otherwise, the power module to be tested has a fault;

[0096] S15: according to S1-S14, a test report is output.

[0097] Specifically, in the embodiment,

[0098] Through the industrial computer, a fourth protection current threshold 200A between pin 2 of the comparator of the fourth high-speed load switching circuit A4 and the I / O module is set, the short circuit module is connected to the fourth high-speed load switching circuit A4, if high level is output at the connection between pin 3 of the comparator of the fourth high-speed load switching circuit A4 and the fourth resistor R4, the program-controlled power supply is disconnected, and the test is ended; otherwise, the test is continued;

[0099] At this time, the third voltage value is read, if the error between the third voltage value and the nominal voltage value of the power supply module to be tested is less than or equal to the third voltage error threshold 0.1V, the power supply module to be tested is fault-free, the test is successful, otherwise, the power supply module to be tested has a fault. Through the industrial computer, a test report recording the entire test process of the test device of the embodiment is output.

[0100] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A universal testing device for a multi-channel redundant power supply module of an internal combustion engine vehicle, comprising a plurality of power supply modules to be tested, characterized in that, The utility model relates to a power supply module test system, including: a plurality of signal conditioning modules, a relay matrix module, a first measuring instrument, a second measuring instrument, a relay X0, a program-controlled power supply and an industrial computer; the signal conditioning module is used for regulating the load of the power supply module to be tested in half load, full load, overcurrent protection and load mutation; the relay matrix module is used for controlling the on-off of the power supply module to be tested and the first measuring instrument and the power supply module to be tested and the second measuring instrument; the first measuring instrument is used for measuring the voltage and resistance of the power supply module to be tested; the second measuring instrument is used for obtaining the output voltage waveform and voltage phase difference of the power supply module to be tested; the relay X0 is used for controlling the on-off between the input end of the power supply module to be tested and the program-controlled power supply; the program-controlled power supply is used for supplying power to the industrial computer and the power supply module to be tested; the industrial computer is used for receiving the signals of the first measuring instrument and the second measuring instrument and sending test signals to the signal conditioning module to realize the test of the power supply module to be tested; the signal conditioning module includes a first fixed resistor, a second fixed resistor, an electronic load, a short circuit module and a high-speed load switching module; the high-speed load switching module includes a first high-speed load switching circuit A1, a second high-speed load switching circuit A2, a third high-speed load switching circuit A3 and a fourth high-speed load switching circuit A4; the first fixed resistor is connected with the output end of the first high-speed load switching circuit A1, the first fixed resistor is connected to the first high-speed load switching circuit A1, so that the power supply to be tested is in half load state, and the power supply to be tested is tested in under-voltage, over-voltage and reverse connection protection; the second fixed resistor is connected with the output end of the second high-speed load switching circuit A2, the second fixed resistor is connected to the second high-speed load switching circuit A2, so that the power supply to be tested is in full load state, and the power supply to be tested is tested in full load and power efficiency; the electronic load is connected with the output end of the third high-speed load switching circuit A3, the electronic load is connected to the third high-speed load switching circuit A3, and the power supply to be tested is tested in over-current protection and load mutation; the short circuit module is connected with the output end of the fourth high-speed load switching circuit A4, the short circuit module is connected to the fourth high-speed load switching circuit A4, and whether the power supply to be tested has a fault is determined; the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 are all connected with the output end of the power supply to be tested.

2. A general test device for a multi-pass redundant power supply module of an internal combustion engine vehicle according to claim 1, characterized in that, It also includes an I / O module; the relay X0, the relay matrix module, the first fixed resistor, the second fixed resistor and the short circuit module are all connected with the industrial computer through the I / O module.

3. A general test device for a multi-pass redundant power supply module of an internal combustion engine vehicle according to claim 1, characterized in that, The signal conditioning module also includes a plurality of interfaces of pieces to be tested; The output end of the power module to be tested is connected with the input end of the first high-speed load switching circuit A1, the input end of the second high-speed load switching circuit A2, the input end of the third high-speed load switching circuit A3 and the input end of the fourth high-speed load switching circuit A4 through the to-be-tested object interface respectively.

4. A general test device for a multi-pass redundant power supply module of an internal combustion engine vehicle according to claim 2, characterized in that, The first high-speed load switching circuit A1, the second high-speed load switching circuit A2, the third high-speed load switching circuit A3 and the fourth high-speed load switching circuit A4 have the same circuit structure, comprising: a buffer, an inverter, a photoelectric coupler, a comparator, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a field effect transistor; The output end of the power module to be tested is connected with one end of the second resistor R2; the other end of the second resistor R2 is connected with the third resistor R3; a voltage stabilizing diode Z1 is connected with the second resistor R2 in parallel; Pin 1 of the field effect transistor is connected with the output end of the power module to be tested, pin 3 of the field effect transistor is connected at the connection of the second resistor R2 and the third resistor R3, and pin 2 of the field effect transistor is connected with the first resistor R1; the other end of the first resistor R1 is connected with the first constant resistor / second constant resistor / short circuit module / electronic load; The other end of the third resistor R3 is connected with pin 1 of the photoelectric coupler; pin 2 of the photoelectric coupler is connected with a low level; pin 4 of the photoelectric coupler is grounded; pin 3 of the photoelectric coupler is connected with the inverter; the other end of the inverter is connected with the buffer, and the other end of the buffer is connected with the I / O module; Pin 2 of the field effect transistor is connected with pin 1 of the comparator at the connection of the first resistor R1; pin 2 of the comparator is connected with the I / O module; Pin 3 of the comparator is connected with the fourth resistor R4, the other end of the fourth resistor R4 is connected with a high level; the connection of pin 3 of the comparator and the fourth resistor R4 is connected with the I / O module.

5. A method of testing a universal test device of a multi-channel redundant power supply module of an internal combustion engine vehicle according to any one of claims 1 to 4, characterized in that, The method comprises the following steps: S1: input the model, number, operator name and test time of the power module to be tested in the industrial computer; S2: read the first resistance value of the input end of the power module to be tested through the first measuring instrument; if the first resistance value is greater than the first resistance threshold value, execute S3, otherwise, the test is ended; S3: read the second resistance value of the output end of the power module to be tested through the first measuring instrument; if the second resistance value is less than the second resistance threshold value, execute S4, otherwise, the test is ended; S4: set the first protection current threshold value on the first high-speed load switching circuit A1; set the output voltage and the first output current value of the program-controlled power supply, and connect the first constant resistor to the first high-speed load switching circuit A1, and connect the input end of the power module to be tested to the program-controlled power supply; if the first high-speed load switching circuit A1 outputs a high level, the program-controlled power supply is disconnected, and the test is ended; Otherwise, execute S5; S5: reading a first voltage value of the power module to be tested by the first measuring instrument, if the error between the first voltage value and the nominal voltage value of the power module to be tested is less than or equal to a first voltage error threshold, S6 is executed, otherwise the test is ended; S6: performing an under-voltage test, an over-voltage test and a reverse connection protection test on the power module to be tested; S7: setting a second protection current threshold on the second high-speed load switching circuit A2; setting a second output current value of the program-controlled power supply, and connecting the second fixed resistor to the second high-speed load switching circuit A2, if the second high-speed load switching circuit A2 outputs a high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S8 is executed; S8: reading a second voltage value of the power module to be tested by the first measuring instrument, if the error between the second voltage value and the nominal voltage value of the power module to be tested is less than or equal to a second voltage error threshold, S9 is executed, otherwise the test is ended; S9: performing a full load test and a power supply efficiency test on the power module to be tested; S10: connecting the second measuring instrument to the input end of the power module to be tested through the relay matrix module, and performing a ripple and noise test, a module power-on delay time test, a power-on rise time test, a power-off holding time test and a power-on overshoot test on the power module to be tested; S11: setting a third protection current threshold on the third high-speed load switching circuit A3; and connecting the electronic load to the third high-speed load switching circuit A3, if the third high-speed load switching circuit A3 outputs a high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S12 is executed; S12: setting a fourth current value through the electronic load, and performing an over-current protection test and a load mutation test on the power module to be tested; S13 is continued to be executed; S13: setting a fourth protection current threshold on the fourth high-speed load switching circuit A4; and connecting the short circuit module to the fourth high-speed load switching circuit A4, if the fourth high-speed load switching circuit A4 outputs a high level, the program-controlled power supply is disconnected, and the test is ended; otherwise, S14 is executed; S14: reading a third voltage value of the power module to be tested by the first measuring instrument, if the error between the third voltage value and the nominal voltage value of the power module to be tested is less than or equal to a third voltage error threshold, the power module to be tested is fault-free, otherwise the power module to be tested has a fault; S15: outputting a test report according to S1-S14.

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