Test bench

Abstract

The utility model relates to new energy automobile test field provides a test bench. Through the multiway output power module that sets up in test bench can provide a variety of power supply scene for the measured piece and test, still can realize different load scene through load and relay cooperation switching, the control logic, diagnosis logic and fault recovery logic etc. of the power distribution system of measured piece carry out the automatic test verification, to make test bench can be compatible with different test demand, effectively improved the multiplicity of test bench.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle testing, and in particular to a test bench. Background Technology

[0002] With the continuous development of new energy vehicles, the vehicle power distribution system is becoming increasingly complex. Before conducting on-road testing of the entire vehicle, it is necessary to test and verify the control logic, diagnostic logic, and fault recovery logic of the vehicle's intelligent power distribution system on a test bench.

[0003] Due to the complexity of power distribution systems, the large number of control loops, and the numerous power supply scenarios that need to be simulated, the relevant technologies cannot fully cover the simulation requirements of power supply scenarios, thus reducing the accuracy of test results. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to provide a test bench that can configure the circuits of the power distribution system to meet different power supply testing needs, thereby efficiently and accurately completing testing tasks.

[0005] According to an embodiment of this utility model, a test bench includes: a multi-output power module connected to the device under test (DUT), which provides various test power supplies to the DUT to allow it to be tested under different voltages; a relay switching box including a switching relay and a load channel group, the common terminal of the switching relay being connected to the DUT, and the switching terminal of the switching relay being switchably connected to one end of each load channel in the load channel group, the load channel group including at least one electronic load channel and at least one analog load channel, the other end of the analog load channel being connected to an external analog load; an electronic load connected to the other end of the electronic load channel, which, along with the external analog load, provides various test loads to the DUT; and an industrial computer connected to both the multi-output power module and the relay switching box, so that the multi-output power module provides test power to the DUT under the control of the industrial computer, and the relay switching box provides test loads to the DUT under the control of the industrial computer.

[0006] According to the test bench of this utility model embodiment, the multi-output power supply module includes: a first programmable power supply, which is connected to the device under test; a first relay, one end of which is connected to the first programmable power supply; and a battery, which is connected to the device under test and the other end of the first relay.

[0007] According to the test bench of this utility model embodiment, the multi-output power module further includes: a second programmable power supply and a charging relay, the second programmable power supply and the charging relay being connected in series between one end of the device under test and the battery; and a second relay, the second relay being connected between the other end of the device under test and the battery.

[0008] According to the test bench of this utility model embodiment, the test bench also includes a communication host, which is disposed between the industrial control computer and the multi-output power module, and between the industrial control computer and the relay switching box, so that the industrial control computer can communicate with the multi-output power module and the relay switching box respectively.

[0009] According to the test bench of this utility model embodiment, the electronic load is connected to the communication host. The electronic load receives the load replacement command from the industrial control computer through the communication host to replace the test load of the test device.

[0010] According to the test bench of this utility model embodiment, the test bench further includes: a signal generator, which is connected to the electronic load and the communication host respectively. The signal generator receives the load replacement command through the communication host and triggers the electronic load to output the corresponding test load based on the load replacement command.

[0011] According to the test bench of this utility model embodiment, the test bench further includes: a signal board box, which is connected to the test device and the communication host respectively, and the signal board box sends the collected status information of the test device to the industrial control computer through the communication host.

[0012] According to the test bench of this utility model embodiment, before the industrial control computer provides the test scenario to the test device based on the status information, it performs basic logic detection on the test device.

[0013] The test bench according to an embodiment of the present invention further includes: a temperature acquisition module, which is connected to a communication host and is used to transmit the acquired temperature signal to an industrial control computer through the communication host; and an oscilloscope, which is connected to the communication host and is used to measure the operating voltage information of the electronic load and the output current information of the multi-output power supply module.

[0014] According to the test bench of this utility model embodiment, the number of simulated load channels is equal to the number of electronic load channels.

[0015] According to the test bench of this utility model embodiment, the multi-output power supply module set in the test bench can provide a variety of power supply scenarios for the device under test to be tested. It can also switch between load and relay to realize different load scenarios, and perform automated testing and verification of the control logic, diagnostic logic and fault recovery logic of the power distribution system of the device under test, so that the test bench can be compatible with different testing requirements and effectively improve the reusability of the test bench.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 A schematic diagram of the connection structure of the test bench provided in this embodiment of the utility model;

[0018] Figure 2 A more detailed structural schematic diagram of the test bench provided in this embodiment of the utility model;

[0019] Figure 3 A schematic diagram of a multi-output power module structure provided for an embodiment of this utility model;

[0020] Figure 4 A schematic diagram of another multi-output power module structure provided in this embodiment of the present utility model;

[0021] Figure 5 This provides a basic logic detection test scenario for the device under test (DUT) in an embodiment of the present invention.

[0022] Figure 6 This invention provides a load test scenario for the test device provided in an embodiment of the present invention.

[0023] Figure 7 Another load test scenario for the test device provided in this embodiment of the utility model.

[0024] Reference numerals in the attached diagram: 1-Test device; 2-Multi-output power supply module; 21-First programmable power supply; 211-First relay; 22-Second programmable power supply; 221-Second relay; 23-Battery; 231-Charging relay; 232-Battery sensor; 3-Industrial computer; 4-Communication host; 5-Signal board box; 6-Relay switching box; 7-Electronic load; 8-Analog load box; 9-Signal generator; 10-Temperature acquisition module; 11-Oscilloscope; 12-Power supply. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] The test bench of an embodiment of the present invention is described below with reference to the accompanying drawings.

[0027] refer to Figure 1 and Figure 2 The test bench of this novel embodiment includes: a multi-output power supply module 2, a relay switching box 6, an electronic load 7, and an industrial control computer 3. The multi-output power supply module 2 is connected to the device under test (DUT) 1 and is used to provide multiple test power supplies to the DUT 1 so that the DUT 1 is tested under different voltages. The relay switching box 6 includes a switching relay and a load channel group. The common terminal of the switching relay is connected to the DUT 1, and the switching terminal of the switching relay is switchably connected to one end of each load channel in the load channel group. The load channel group includes at least one electronic load channel and at least one analog load channel. The other end of the analog load channel is connected to an external analog load. The electronic load 7 is connected to the other end of the electronic load channel. The electronic load 7 and the external analog load are used to provide multiple test loads to the DUT 1. The industrial control computer 3 is connected to the multi-output power supply module 2 and the relay switching box 6 respectively, so that the multi-output power supply module 2 provides test power to the DUT 1 under the control of the industrial control computer 3, and the relay switching box 6 provides test loads to the DUT 1 under the control of the industrial control computer 3.

[0028] Specifically, the test bench can perform comprehensive performance tests, reliability tests, durability tests, and safety tests on the vehicle's intelligent power distribution system based on simulated various working conditions and environmental conditions.

[0029] Among them, the industrial control computer 3 is the control center of the test bench. The industrial control computer 3 can be a PC, a programmable controller or other controllable device. The industrial control computer 3 is also connected to other peripherals (such as mouse, keyboard, display screen, etc.) to realize signal input and output to the industrial control computer 3. The multi-output power module 2 includes a first programmable power supply 21, a second programmable power supply 22 and a battery 23. The multi-output power module 2 can control the closing of the relay to control the first programmable power supply 21, the second programmable power supply 22 or the battery 23 to input the corresponding test power to the test device 1.

[0030] For relay switching box 6, such as Figure 1The relays K1 and K2 shown together constitute a switching relay. The industrial control computer 3 can control the switching relay to switch the connection between the load channel group and the device under test 1, so as to realize the connection and combination of various external simulated loads and electronic loads 7, thereby simulating the test scenarios of the device under test 1 under different load conditions in actual applications and performing performance tests on the device under test 1.

[0031] It should be noted that the switching relay can be as follows: Figure 1 The two relays K1 and K2 shown can be combined, but they can also be composed of more relays. Figure 1 The number of relays and their connections are for illustrative purposes only.

[0032] It should be noted that the external simulated load is used to simulate the electrical appliances of the whole vehicle, such as headlights and wipers. The electronic load 7 is used to change the state of the external simulated load under different power conditions. The external simulated load is placed in the simulated load box 8. The external simulated load and the test bench are set independently. The external simulated load can be replaced according to the test scenario requirements of the test component 1, which can make the test bench more compatible.

[0033] The power supply 12 of the test bench can convert the AC power (usually 220V or 110V) provided by the mains grid into the DC power or other forms of power required by the test bench, so as to provide the test device 1 with a variety of power test scenarios, ensuring the normal operation of the test bench and the accuracy of the test results of the test device 1.

[0034] It should be noted that the test bench can be used to test the device under test (DUT) 1 via CANoe (Controller Area Network open environment). Testers can use CANoe to simulate sending various messages to test the DUT 1's response and processing capabilities. In this embodiment of the invention, the DUT 1 includes an intelligent power distribution module, which can be configured to form a power distribution circuit. The performance and functionality of the intelligent power distribution module, as well as the overall performance of the power distribution circuit, are tested.

[0035] It should be noted that the component under test 1 can be an Electronic Control Unit (ECU). The ECU is one of the core components of the vehicle's electrical distribution system. It can receive information from various sensors on the vehicle, such as engine speed, vehicle speed, and throttle position, and control various systems of the vehicle according to the preset program based on this information. The performance and stability of the ECU are directly related to the vehicle's power, economy, safety, and comfort.

[0036] It should be noted that the device under test 1 can also be any electronic or electrical component circuit board, module or system. During the test, the device under test 1 will be placed under different voltage conditions to evaluate its performance, stability, reliability and so on under these conditions.

[0037] As an optional embodiment, refer to Figure 1 The test bench also has a power interface for connecting the device under test 1 to the multi-output power module 2. The multi-output power module 2 can provide multiple voltages to the device under test 1 according to the testing requirements, so that the device under test 1 can be tested under multiple voltage conditions. This allows the tester to understand the performance of the device under test 1 under various voltage conditions, thereby providing valuable reference information for its subsequent design, improvement or use.

[0038] refer to Figure 3 This is a schematic diagram of a multi-output power module 2 provided in an embodiment of the present utility model.

[0039] As an optional embodiment, the multi-output power module 2 includes: a first programmable power supply 21, a first relay 211, and a battery 23. The first programmable power supply 21 is connected to the device under test 1, one end of the first relay 211 is connected to the first programmable power supply 21, and the battery 23 is connected to the device under test 1 and the other end of the first relay 211.

[0040] Specifically, some vehicle models may have no redundant power supply (i.e., there is only one programmable power supply in the circuit). In this case, the power supply equipment only contains the battery 23 and one programmable power supply. The test of the device under test 1 can be achieved by controlling the opening and closing state of the relay between the battery 23 and the programmable power supply.

[0041] refer to Figure 4 This is a schematic diagram of another multi-output power module 2 provided in an embodiment of the present utility model.

[0042] As an optional embodiment, the multi-output power module 2 further includes: a second programmable power supply 22, a charging relay 231, and a second relay 221. The second programmable power supply 22 and the charging relay 231 are connected in series between one end of the device under test 1 and the battery 23, and the second relay 221 is connected between the other end of the device under test 1 and the battery 23.

[0043] Specifically, the test bench may be equipped with two power interfaces for connecting to the device under test (DUT) 1. These power interfaces connect to a first node where a first programmable power supply 21 connects to DUT 1, and to a second node where a second programmable power supply 22 connects to DUT 1. The first programmable power supply 21 is also connected to a battery 23 via a first relay 211, and the second programmable power supply 22 is also connected to the battery 23 via a second relay 221 and a charging relay 231. The voltages of the first programmable power supply 21 and the second programmable power supply 22 can be set and input to DUT 1 to verify the performance of DUT 1 under different scenarios such as overvoltage and undervoltage.

[0044] The power supply principle of the multi-output power module 2 to the device under test 1 can be implemented in the following ways:

[0045] Example 1:

[0046] When the charging relay 231 is closed, the first relay 211 and the second relay 221 are opened, and the first programmable power supply 21 and the second programmable power supply 22 are not turned on, a test scenario can be simulated in which the second programmable power supply 22 charges the battery 23. At this time, AD sampling is performed at the end of the battery 23. When the battery sensor 232 in the battery 23 detects that it is fully charged, it controls the charging relay 231 to open, so as to avoid overcharging the battery 23 and thus damaging the battery 23, thereby improving the service life of the battery 23.

[0047] Example 2:

[0048] When the charging relay 231, the first relay 211 and the second relay 221 are disconnected, and the first programmable power supply 21 and the second programmable power supply 22 output to the device under test 1, the basic logic test of the device under test 1 can be completed by setting the voltage output by the first programmable power supply 21 and the second programmable power supply 22 to the device under test 1.

[0049] Example 3:

[0050] When the charging relay 231 is disconnected, the first relay 211 and the second relay 221 are closed, and the first programmable power supply 21 and the second programmable power supply 22 output to the device under test 1, the test scenario in which the vehicle energy storage system (battery 23) and the power generation system (first programmable power supply 21 and second programmable power supply 22) simultaneously supply power to the device under test 1 can be simulated. The response of the device under test 1 can be further checked by simulating the driving conditions of the vehicle through the test bench.

[0051] Example 4:

[0052] When the charging relay 231 is disconnected, the first relay 211 and the second relay 221 are closed, and the first programmable power supply 21 and the second programmable power supply 22 are not turned on, the test scenario of the whole vehicle supplying power to the test component 1 through the energy storage system (battery 23) when the vehicle is parked can be simulated.

[0053] As an optional embodiment, refer to Figure 1 The test bench also includes a communication host 4, which is located between the industrial control computer 3 and the multi-output power module 2, and between the industrial control computer 3 and the relay switching box 6, so that the industrial control computer 3 can communicate with the multi-output power module 2 and the relay switching box 6 respectively.

[0054] Specifically, testers can write test cases on the industrial control computer 3. These test cases can include setting test voltage ranges, test times, and relay opening and closing, etc., to control the multi-output power supply module 2 and the relay switching box 6. Furthermore, the industrial control computer 3 converts the information in the test cases into control commands and sends the control commands to the multi-output power supply module 2 and the relay switching box 6 through the communication host 4. The multi-output power supply module 2 and the relay switching box 6 can then adjust the closing of the relays in the multi-output power supply module 2 and the output voltage, etc., and the closing of the relays in the relay switching box 6 according to the received control commands, so as to provide the working conditions required for testing to the device under test 1. Furthermore, the testers analyze and process the response data collected from the device under test 1 and store the processing results.

[0055] As an optional embodiment, refer to Figure 1 The electronic load 7 is connected to the communication host 4. The electronic load 7 receives the load replacement command from the industrial control computer 3 through the communication host 4 to replace the test load of the test component 1.

[0056] Specifically, the industrial control computer 3 can also adjust the electronic load 7 through the communication host 4 to provide various test loads for the device under test 1. For example, the industrial control computer 3 can rewrite the test cases, adjust the setting parameters in the test cases, and transmit the parameter information in the test cases to the electronic load 7 through the communication host 4 to change the size of the electronic load 7 and simulate fault conditions such as short circuit and overcurrent of the windshield wiper.

[0057] As an optional embodiment, refer to Figure 1 and Figure 2 The test bench also includes a signal generator 9, which is connected to the electronic load 7 and the communication host 4 respectively. The signal generator 9 receives the load replacement command through the communication host 4 and triggers the electronic load to output the corresponding test load based on the load replacement command.

[0058] Specifically, the signal generator 9 can generate electrical signals of various types, frequencies and amplitudes. When the industrial control computer 3 issues an adjustment command, it is sent to the control unit of the electronic load 7 through the communication host 4, and further transmitted to the signal generator 9. The signal generator 9 generates a trigger signal and sends it back to the control unit of the electronic load 7. After receiving the trigger signal, the electronic load 7 adjusts the corresponding test load (such as current value, voltage value, power value, etc.) and outputs it.

[0059] As an optional embodiment, refer to Figure 1 and Figure 2 The test bench also includes a signal board box 5, which is connected to the test piece 1 and the communication host 4 respectively. The signal board box 5 sends the status information of the test piece 1 collected by the test piece 1 to the industrial control computer 3 through the communication host 4.

[0060] Specifically, the signal board box 5 contains multiple signal boards, each with a specific interface and circuitry to facilitate connection and communication with the device under test 1. The signal boards are responsible for collecting the status information (such as voltage, current, temperature, frequency, etc.) of the device under test 1 in the test bench. By setting up the signal board box in the test bench, the status of the test circuit can be read automatically and quickly, and the status information can be quickly sent to the industrial control computer 3 through the communication host 4, thereby improving the response speed of the test bench.

[0061] It should be noted that the signal board box 5 can also be connected to other external loads, providing more load scenarios for the test bench for testing. These external loads can be, for example, other rechargeable devices such as mobile phones.

[0062] The signal board box 5 is equipped with multiple loop connection points. The input end of the loop connection point is connected to the channel of the device under test 1. The output end of the connection point can be connected to different signal boards in the signal board box 5. The status information of the loop obtained by the signal board is transmitted to the industrial control computer 3 through the communication host 4. The output end of the connection point can also be connected to the relay switching box 6. The industrial control computer 3 sends control commands to the relay switching box 6 through the communication host 4 to switch the load state of the device under test 1 and test different load states.

[0063] As an optional embodiment, the industrial control computer 3 performs basic logic detection on the device under test 1 based on the status information before the external simulated load and electronic load 7 provide the test scenario to the device under test 1.

[0064] refer to Figure 5 This is the basic logic detection test scenario for the device under test 1 provided in this embodiment of the utility model.

[0065] In the diagram, CH1, CH2, etc. represent the connection ports between the signal board box 5 and the relay switching box 6, and RE1, RE2, etc. represent different relays.

[0066] When the relay switching box 6 is switched to connect to an external simulated load and the connection between the external simulated load and the signal board box 5 is disconnected, there is no load connected in the test circuit. The industrial control computer 3 sends a basic logic test command to the device under test 1. After the device under test 1 responds to the command, it collects the status information of the device under test 1 through the signal board in the signal board box 5 and sends it to the industrial control computer 3 through the communication host 4. The industrial control computer 3 further determines whether the status information of the device under test 1 after responding is consistent with the control command, thereby determining whether the device under test 1 has passed the basic logic test.

[0067] The following example, using two test circuits, illustrates the load test of component 1 under test:

[0068] refer to Figure 6 This is a load test scenario for the test piece 1 provided in this embodiment of the utility model.

[0069] When the relay switching box 6 is switched to connect to an external simulated load and the connection between the external simulated load and the signal board box 5 is closed, the test circuit can simulate the connection of all loads of the whole vehicle. The industrial control computer 3 sends a test command to the device under test 1. After the device under test 1 responds to the command, it collects the response speed and status information of the device under test 1 through the signal board in the signal board box 5, and sends it to the industrial control computer 3 through the communication host 4. The industrial control computer 3 further judges the response speed and stability of the response data of the device under test 1, thereby realizing the test of the performance of the device under test 1 under current load.

[0070] refer to Figure 7 This is another load test scenario for the test piece 1 provided in this embodiment of the utility model.

[0071] When the relay switches the connection of one of the test circuits to the electronic load 7, while the other test circuits remain connected to the external simulated load and the connection between the external simulated load and the signal board box 5 is closed, the test circuit can simulate fault scenarios such as short circuits and overcurrents by adjusting the electronic load 7. The industrial control computer 3 sends a detection command to the device under test 1. After the device under test 1 responds to the command, the signal board in the signal board box 5 collects the response operation of the device under test 1 and sends it to the industrial control computer 3 through the communication host 4. The industrial control computer 3 further judges whether the device under test 1 can disconnect as expected in the fault scenario, whether the response performance such as disconnection time is consistent with the expectation, and whether the recovery strategy after the fault is consistent with the preset strategy, so as to realize the performance test of the intelligent power distribution system of the device under test 1 in the fault scenario.

[0072] As an optional embodiment, refer to Figure 1As shown in Figure 2, the test bench also includes: a temperature acquisition module 10, which is connected to the communication host 4 and is used to transmit the acquired temperature signal to the industrial control computer 3; and an oscilloscope 11, which is connected to the communication host 4 and is used to measure the operating voltage information of the electronic load 7 and the output current information of the multi-output power supply module 2.

[0073] Specifically, the temperature acquisition module 10 can acquire temperature information of the connecting wires and various hardware devices of the test piece 1 through the temperature sensor, and convert the temperature information into a signal to be transmitted to the industrial control computer 3, so as to monitor the operating status of the test bench and adjust the control scheme according to the operating status to ensure that the test environment of the test bench for the test piece 1 is stable.

[0074] The temperature acquisition module 10 can set a temperature threshold and send an alarm signal to the industrial control computer 3 when the acquired temperature exceeds the preset value, so as to notify the test personnel to take corresponding measures to ensure that the test bench can operate safely.

[0075] The temperature acquisition module 10 can also verify the rationality of protection characteristics. For example, overcurrent protection, overvoltage protection and other protection devices need to be adjusted and optimized based on temperature data. By monitoring the temperature of the wires and controller in real time, testers can evaluate the performance and reliability of the protection devices and make adjustments and improvements as needed.

[0076] The oscilloscope 11 is an instrument used to measure and display the changes of electrical signals such as voltage and current over time. In this embodiment of the present invention, the oscilloscope 11 is integrated into the test bench and connected to the communication host 4. The oscilloscope 11 can measure the voltage change of the electronic load 7 during operation to evaluate the stability of the electronic load 7. The oscilloscope 11 can also measure the output current information of the multi-output power module 2 to determine the performance of the device under test 1 under different power supply conditions.

[0077] As an optional embodiment, refer to Figure 1 The number of analog load channel groups is equal to the number of electronic load channel groups.

[0078] Specifically, under normal circumstances, a vehicle includes a variety of electrical appliances, that is, it has a variety of external simulated loads. Any external simulated load can be tested for faults by electronic load 7. The number of simulated load channel groups in the test circuit of the test bench needs to be equal to the number of electronic load channel groups so that the relay switching box 6 can switch the connection of any test circuit between electronic load 7 and external simulated load.

[0079] As an optional embodiment, refer to Figure 1The industrial control computer 3 is connected to the communication host 4. The communication host 4 is connected to the oscilloscope 11, electronic load 7, signal generator 9, temperature acquisition module 10, relay switching box 6, signal board box 5, and multi-output power supply module 2. The industrial control computer 3 can send control commands to the hardware devices connected to the communication host 4 through the communication host 4, and can also receive feedback signals transmitted from the hardware devices connected to the communication host 4. The oscilloscope 11 can display waveform information such as voltage and current of hardware or test circuits, including but not limited to the electronic load 7 and multi-output power supply module 2. The first channel of the oscilloscope 11 can be a voltage probe for voltage measurement and monitoring of signals, and the second channel of the oscilloscope 11 can be a current probe for measuring the magnitude of current in the test circuit. The measurement channels of the oscilloscope 11 can be customized according to different requirements. Modifications are made according to actual testing requirements; the signal board box 5 is also connected to the device under test 1, which can collect the status information of the device under test 1 and send it to the industrial control computer 3 through the communication host 4; the relay switching box 6 is connected to the electronic load 7 and is used to control the connection and disconnection of the electronic load 7; the electronic load 7 is also connected to the signal generator 9 and can output the corresponding load according to the input information of the signal generator 9; the external analog load is set in the analog load box 8 and the analog load box 8 is connected to the relay switching box 6; the temperature acquisition module 10 is connected to the communication host 4, and can also be connected to the signal board box 5 and other hardware devices in the test bench that need to measure temperature. The communication host 4 can transmit the received temperature information to the signal board box 5 for analysis and processing; the multi-output power supply module 2 is connected to the device under test 1 and is used to provide a voltage source for the device under test 1.

[0080] According to the test bench of this utility model embodiment, the multi-output power supply module set in the test bench can provide a variety of power supply scenarios for the device under test to be tested. It can also switch between load and relay to realize different load scenarios, and perform automated testing and verification of the control logic, diagnostic logic and fault recovery logic of the power distribution system of the device under test, so that the test bench can be compatible with different testing requirements and effectively improve the reusability of the test bench.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Furthermore, the terms "first," "second," etc., used in the embodiments of this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this utility model can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this utility model, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0083] In this utility model, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific implementation.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A test bench, characterized in that, The test bench includes: A multi-output power supply module (2) is connected to the device under test (1). The multi-output power supply module (2) is used to provide the device under test (1) with multiple test power supplies so that the device under test (1) is tested under different voltages. The relay switching box (6) includes a switching relay and a load channel group. The common terminal of the switching relay is connected to the device under test (1). The switching terminal of the switching relay is switchably connected to one end of each load channel in the load channel group. The load channel group includes at least one electronic load channel and at least one analog load channel. The other end of the analog load channel is connected to an external analog load. An electronic load (7) is connected to the other end of the electronic load channel. The electronic load (7) and the external analog load are used to provide various test loads to the device under test (1). An industrial control computer (3) is connected to the multi-output power supply module (2) and the relay switching box (6) respectively, so that the multi-output power supply module (2) provides test power to the device under test (1) based on the control of the industrial control computer (3), and the relay switching box (6) provides test load to the device under test (1) based on the control of the industrial control computer (3).

2. The test bed of claim 1, wherein, The multi-output power module (2) includes: A first programmable power supply (21) is connected to the device under test (1); A first relay (211), one end of which is connected to the first programmable power supply (21); A storage battery (23) is connected to the other end of the test device (1) and the first relay (211).

3. The test bed of claim 2, wherein, The multi-output power supply module (2) also includes: The second programmable power supply (22) and the charging relay (231) are connected in series between one end of the test device (1) and the storage battery (23); A second relay (221) is connected between the test object (1) and the other end of the battery (23).

4. The test bed of claim 1, wherein, The test bench also includes a communication host (4), which is located between the industrial control computer (3) and the multi-output power module (2) and between the industrial control computer (3) and the relay switching box (6), so that the industrial control computer (3) can communicate with the multi-output power module (2) and the relay switching box (6) respectively.

5. The test bed of claim 4, wherein, The electronic load (7) is connected to the communication host (4). The electronic load (7) receives the load replacement instruction from the industrial control computer (3) through the communication host (4) to replace the test load of the test device (1).

6. The test bed of claim 5, wherein, The test bench also includes: The signal generator (9) is connected to the electronic load (7) and the communication host respectively. The signal generator (9) receives the load replacement command through the communication host (4) and triggers the electronic load (7) to output the corresponding test load based on the load replacement command.

7. The test bed of claim 5, wherein, The test bench also includes: The signal board box (5) is connected to the device under test (1) and the communication host (4) respectively. The signal board box (5) sends the status information of the device under test (1) collected by the signal board box (5) to the industrial control computer (3) through the communication host (4).

8. The test bed of claim 7, wherein, Before the external simulated load and the electronic load (7) provide a test scenario to the device under test (1), the industrial control computer (3) performs basic logic detection on the device under test (1) based on the status information.

9. Test bench according to any of claims 4-8, characterized in that, The test bench also includes: Temperature acquisition module (10), the temperature acquisition module (10) is connected to the communication host (4), and is used to transmit the acquired temperature signal to the industrial control computer (3) through the communication host (4); An oscilloscope (11) is connected to the communication host (4) and is used to measure the operating voltage information of the electronic load (7) and the output current information of the multi-output power module (2).

10. The test bed of any one of claims 1-8, wherein, The number of analog load channels is equal to the number of electronic load channels.

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