Air spring measurement and control method, system and medium for road simulation test

Abstract

The present invention discloses an air spring measurement and control method, system and medium for road simulation testing, the method comprising the following steps: controlling an air spring measurement and control device to obtain an initial vehicle height of a test vehicle; when it is determined that the difference between the initial vehicle height and a target height exceeds a preset error range, controlling the air spring measurement and control device to enter a working state, adjusting the vehicle height of the test vehicle and obtaining a new vehicle height in real time; when the difference between the new vehicle height and the target height is within a preset error range, or when the timing duration of a second timer module reaches a second preset duration, controlling the air spring measurement and control device to enter a standby state; when the timing duration of a third timer module reaches a third preset duration, controlling the air spring measurement and control device to enter a shutdown state, and when the timing duration of the first timer module reaches the first preset duration, controlling the bench to run the next working condition; ensuring the safety and stability of vehicle height adjustment and improving the test efficiency of the bench test.

Description

Technical Field

[0001] The present invention generally relates to the field of automobile testing technology, and in particular to an air spring measurement and control method, system and medium for road simulation testing. Background Art

[0002] In order to balance the comfort and handling of vehicles, more and more OEMs are installing air springs on their vehicles. The structural durability test of vehicles equipped with air springs is very important and is an important part of the vehicle development process. The test objects include structural parts such as chassis, body and air spring system. At present, the industry mainly completes the test through road simulation test (bench test), which has the advantages of short test cycle and high test accuracy.

[0003] However, during the actual bench test, the air spring is easily affected by the external environment, and there is a physical phenomenon of thermal expansion and contraction, which causes the height of the air spring to change, and then changes the height of the vehicle body, affecting the force state and movement posture of the vehicle. In addition, the test conditions are all intensive conditions, which are characterized by long time and high intensity, which will aggravate the leakage of the air spring system. Therefore, almost after each fixed operation time or each condition, the vehicle body height will exceed the target value and need to be adjusted frequently. The first thing to do is to choose the vehicle's own body height adjustment system for adjustment, but there are two problems. First, in order to ensure safety during the bench test, the test vehicle must be powered off and the battery power must be discharged to the minimum value. This leads to the need to pause the bench before each adjustment, power on the test vehicle, adjust the body height, power off the test vehicle, and continue to run the bench. Not only is the overall adjustment time long, but safety is also difficult to guarantee. Second, the high-frequency operation of the vehicle's own body height adjustment system will cause local overheating of the system, and ultimately make the system function uncontrollable or even ineffective. In addition, for vehicles that are tested for structural durability, the OEMs often only assemble the major structural parts, and the vehicle's own body height adjustment system is often not configured or simply loaded, so the vehicle's own system cannot be used to adjust the body height during bench testing. Therefore, we propose an air spring measurement and control method, system and medium for road simulation testing to solve the above problems. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide an air spring measurement and control method, system and medium for road simulation testing that ensures the safety and stability of vehicle height adjustment and improves the test efficiency of bench testing.

[0005] In a first aspect, the present invention provides an air spring measurement and control method for road simulation testing, comprising the following steps:

[0006] When the test bench has finished running the previous working condition, the control bench is suspended, the air spring measurement and control device is controlled to obtain the initial vehicle height of the test vehicle, and the first timer module is controlled to start timing;

[0007] When it is determined that the difference between the initial vehicle height and the target height exceeds a preset error range, the second timer module is started to start timing, the air spring measurement and control device is controlled to enter a working state, the vehicle height of the test vehicle is adjusted, and a new vehicle height is obtained in real time;

[0008] When the difference between the new vehicle height and the target height is within a preset error range, or when the timing duration of the second timer module reaches a second preset duration, the air spring measurement and control device is controlled to enter a standby state, and the third timer module is controlled to start timing and the second timer module is controlled to return to zero;

[0009] When the timing duration of the third timer module reaches a third preset duration, the air spring measurement and control device is controlled to enter a shutdown state, and the third timer module is controlled to return to zero;

[0010] When the timing duration of the first timer module reaches a first preset duration, the control rack runs the next working condition and controls the first timer module to return to zero.

[0011] According to the technical solution provided by the present invention, after controlling the first timer module to start timing, the following steps are also included:

[0012] When it is determined that the difference between the initial vehicle height and the target height does not exceed a preset error range, controlling the third timer module to start timing;

[0013] When the timing duration of the third timer module reaches a third preset duration, the air spring measurement and control device is controlled to enter a shutdown state, and the third timer module is controlled to return to zero.

[0014] According to the technical solution provided by the present invention, the method for judging whether the test bench has completed the previous working condition includes the following steps:

[0015] Obtain the current test conditions of the test bench and monitor its running time in real time;

[0016] Calling a test database to query the test duration corresponding to a working condition consistent with the current test working condition; the test database at least includes: multiple working conditions and corresponding test durations;

[0017] When the operating time of the test bench reaches the corresponding test time, it is determined that the test bench has completed the previous operating condition.

[0018] According to the technical solution provided by the present invention, the air spring measurement and control device adjusts the body height of the test vehicle by the following method:

[0019] If the difference between the current vehicle height and the target height is less than the first difference, the air spring measurement and control device is controlled to inflate the air spring of the test vehicle, thereby raising the vehicle height;

[0020] If the difference between the current vehicle body height and the target height is greater than a second difference, the air spring measurement and control device deflates the air spring of the test vehicle to thereby lower the vehicle body height; the second difference is greater than the first difference.

[0021] In a second aspect, the present invention provides an air spring measurement and control system for road simulation testing, which can implement the above method, and the system includes:

[0022] Communicatively connected test bench control module, timer unit and air spring measurement and control device;

[0023] The platform control module is configured to control the platform, the air spring measurement and control device and the start and stop of the timer unit;

[0024] The timer unit is configured to measure time;

[0025] The air spring measurement and control device is configured to detect and adjust the body height of the test vehicle.

[0026] According to the technical solution provided by the present invention, the air spring measurement and control device includes:

[0027] A height sensor module, which is arranged between the wheel center and the wheel arch of the vehicle and is used to measure the height of the vehicle body;

[0028] A data acquisition module configured to obtain a vehicle height measured by a height sensor module;

[0029] The device control module is configured to control the regulating unit to adjust the vehicle height when the difference between the vehicle height and the target height exceeds a preset error range.

[0030] According to the technical solution provided by the present invention, the adjustment unit includes:

[0031] a first regulating module, the first regulating module being connected to the air spring through an air pipe; the first regulating module being configured to inflate the air spring, thereby raising the vehicle height;

[0032] An air circuit control module, the air circuit control module is installed on the air pipe, and the air circuit control module is configured to control the on-off of the first regulating module and the air spring;

[0033] The second regulating module is installed on the air pipe and is located between the air circuit control module and the air spring. The second regulating module is configured to deflate the air spring to thereby lower the height of the vehicle body.

[0034] According to the technical solution provided by the present invention, the timer unit includes:

[0035] A first timer module is configured to time the time from when the rack stops running to when it starts running next time;

[0036] a second timer module, configured to adjust the vehicle height timing for the air spring measurement and control device;

[0037] The third timer module is configured to time the switching of the air spring measurement and control device from the working state to the standby state.

[0038] In a third aspect, the present invention provides a computer-readable storage medium having a computer program, and when the computer program is executed by a processor, the steps of an air spring measurement and control method for road simulation testing as described above are implemented.

[0039] In summary, the present invention discloses a specific process of an air spring measurement and control method for road simulation testing. The present invention controls the control rack to suspend operation when the rack runs the previous working condition, controls the air spring measurement and control device to obtain the initial vehicle height of the test vehicle, and controls the first timer module to start timing; when it is judged that the difference between the initial vehicle height and the target height exceeds the preset error range, the second timer module is started to start timing, the air spring measurement and control device is controlled to enter the working state, the vehicle height of the test vehicle is adjusted and the new vehicle height is obtained in real time; when the difference between the new vehicle height and the target height is within the preset error range, or when the timing duration of the second timer module reaches the second preset duration, the air spring measurement and control device is controlled to enter the standby state, and the third timer module is controlled to start timing and the second timer module is controlled to return to zero; when the timing duration of the third timer module reaches the third preset duration, the air spring measurement and control device is controlled to enter the shutdown state, and the third timer module is controlled to return to zero; when the timing duration of the first timer module reaches the first preset duration, the control rack runs the next working condition, and the first timer module is controlled to return to zero. The adjustment of the vehicle body height between two adjacent working conditions can be completed through the above process.

[0040] By adjusting the vehicle height through a separately set air spring measurement and control device, the accuracy of the vehicle height adjustment can be guaranteed; further, the first preset time is first used to constrain the overall interval time between two adjacent working conditions, so that the total time of all working condition tests and vehicle height adjustment of the entire project can be controlled, and the first preset time can be adjusted according to actual needs; secondly, the second preset time is used to constrain the duration of the vehicle height adjustment, and in order to ensure that all tests are successfully completed within the aforementioned total time, even if the vehicle height adjustment process is not completed within the second preset time, the air spring measurement and control device needs to be turned off to avoid the vehicle height adjustment exceeding the first preset time, which makes the total time longer and affects the test efficiency; finally, the third preset time is used to reserve a buffer time for the air spring measurement and control device to return to the shutdown state, so as to ensure the safety and stability of the vehicle height adjustment and avoid failure of the air spring measurement and control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0042] Figure 1 The figure is a flow chart of the air spring measurement and control method for road simulation testing.

[0043] Figure 2 This is a schematic diagram of the structure of the air spring measurement and control system used for road simulation testing.

[0044] Numbers in the figure: 1. Test bench control module; 2. Height sensor module; 3. Data acquisition module; 4. Device control module; 5. First adjustment module; 6. Air spring; 7. Air path control module; 8. Second adjustment module; 9. First timer module; 10. Second timer module; 11. Third timer module. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0047] In the existing automobile structural durability test, dozens of working conditions are often included, and the duration of each working condition ranges from a few seconds to several minutes, and the test program arranges the running order and number of each working condition according to actual needs. In order to fully evaluate the durability of the automobile structure, the test requires that the vehicle height be collected after each fixed running time or after each working condition, and then compared with the target height to determine whether it is necessary to start the vehicle's built-in body height adjustment system. However, when actually evaluating the durability of the automobile structure, only the major structural parts are often assembled, and the vehicle's own body height adjustment system is generally not equipped or simply loaded, so the body height cannot be effectively adjusted after each working condition. Moreover, even if the built-in body height adjustment system is configured, the high frequency of starting the built-in body height adjustment system will cause the system to overheat locally, and the function will be uncontrollable or even fail. To address these problems, we design the following solutions.

[0048] Example 1

[0049] Please refer to Figure 1 The flow chart of an air spring measurement and control method for road simulation test provided by the present invention includes the following steps:

[0050] S10, when the test bench has finished running the previous working condition, the control bench is stopped, the air spring measurement and control device is controlled to obtain the initial vehicle height of the test vehicle, and the first timer module 9 is controlled to start timing;

[0051] Among them, the platform control module 1 can control the platform to stop running. At the same time, the platform control module 1 sends a high-level signal S to the air spring measurement and control device. output , this high level signal is used to indicate that the air spring measurement and control device starts working.

[0052] Furthermore, the method for judging whether the test bench has completed the last working condition comprises the following steps:

[0053] Obtain the current test conditions of the test bench and monitor its running time in real time;

[0054] Calling a test database to query the test duration corresponding to the working condition consistent with the current test condition; the test database at least includes: multiple working conditions and corresponding test durations;

[0055] When the operating time of the test bench is equal to the corresponding test time, it is determined that the test bench has completed the previous operating condition.

[0056] The test database is shown in Table 1.

[0057] Table 1 Test database

[0058] Condition No. Condition Name Test duration (seconds) Cycle times E1 Road A M1 N1 E2 Road B M2 N2 E3 C Road M3 N1 ... ... ... ...

[0059] S20, when it is determined that the difference between the initial vehicle height and the target height exceeds a preset error range, the second timer module 10 is started to start timing, the air spring measurement and control device is controlled to enter a working state, the vehicle height of the test vehicle is adjusted, and a new vehicle height is obtained in real time;

[0060] Here, the target height is, for example, 4 mm; the preset error range is, for example, ±3 mm; and the first preset duration is obtained by timing by the timer unit.

[0061] Specifically, the air spring measurement and control device adjusts the body height of the test vehicle by the following method:

[0062] If the difference between the current vehicle height and the target height is less than the first difference, the air spring measurement and control device inflates the air spring 6 to increase the vehicle height;

[0063] If the difference between the current vehicle body height and the target height is greater than the second difference, the air spring measurement and control device deflates the air spring 6 to thereby lower the vehicle body height; the second difference is greater than the first difference.

[0064] Here, the first difference is, for example, -3 mm, and the second difference is, for example, +3 mm.

[0065] S30, when the difference between the new vehicle height and the target height is within a preset error range, or when the timing duration of the second timer module 10 reaches a second preset duration, the air spring measurement and control device is controlled to enter a standby state, and the third timer module 11 is controlled to start timing and the second timer module 10 is controlled to return to zero;

[0066] Among them, the standby state of the air spring measurement and control device refers to a state in which the air spring measurement and control device no longer collects vehicle body height and inflates and deflates the air spring.

[0067] Furthermore, when the timing duration of the second timer module 10 reaches the second preset duration, it is necessary to force the air spring measurement and control device to enter the standby state. In order to shorten the test time of the project as much as possible and ensure the test efficiency, at the end of the second preset duration, when it is judged that the difference between the new vehicle height and the target height exceeds the preset error range, the test bench control module 1 forces the air spring measurement and control device to be closed. At this time, although the vehicle height has not been adjusted to a reasonable range, it will not seriously affect the test effect of the next working condition.

[0068] S40, when the timing duration of the third timer module 11 reaches a third preset duration, the air spring measurement and control device is controlled to enter a shutdown state, and the third timer module 11 is controlled to return to zero;

[0069] The third preset time length is shorter than the second preset time length, and the second preset time length is shorter than the first preset time length.

[0070] Specifically, when the end time of the third preset time is reached, the air spring measurement and control device sends a high-level signal S to the test bench control module 1. input The high-level signal is used to indicate that the air spring measurement and control device has completed the vehicle height adjustment work. The test bench control module 1 receives the high-level signal S input After closing the high level signal S output The air spring measurement and control device is then turned off and the third timer module 11 is controlled to return to zero.

[0071] The lengths of the first preset time length, the second preset time length and the third preset time length can be set and adjusted according to actual conditions.

[0072] S50: When the timing duration of the first timer module 9 reaches the first preset duration, the control rack runs the next working condition and controls the first timer module 9 to return to zero.

[0073] Furthermore, after controlling the first timer module 9 to start timing, the following steps are also included:

[0074] When it is determined that the difference between the initial vehicle height and the target height does not exceed the preset error range, the third timer module 11 is controlled to start timing;

[0075] When the timing duration of the third timer module 11 reaches the third preset duration, the air spring measurement and control device is controlled to enter a shutdown state, and the third timer module 11 is controlled to return to zero.

[0076] When the end time of the third preset time is reached, the air spring measurement and control device sends a high level signal S to the test bench control module 1. input , the platform control module 1 receives a high level signal S input After closing the high level signal S output The air spring measurement and control device is then shut down.

[0077] It should be noted that when it is determined that the difference between the vehicle height and the target height does not exceed the preset error range, the starting time of the third preset time length is the same as the starting time of the first preset time length and the starting time of the second preset time length.

[0078] When the end time of the first preset time is reached, the rack control module 1 turns off the timer unit and starts the rack to run the next working condition.

[0079] The present invention uses a separately set air spring measurement and control device to communicate with the test bench control module 1, and designs the first timer module 9, the second timer module 10 and the third timer module 11 to perform corresponding timing work on the vehicle height adjustment process between two adjacent working conditions, so as to complete the adjustment of the air spring without configuring the vehicle's own vehicle height adjustment system, thereby completing the entire test process. Specifically, when the test bench completes a working condition, the test bench control module 1 controls the test bench to suspend operation and simultaneously starts the first timer module 9 to start timing and starts the air spring measurement and control device to start working. The air spring measurement and control device collects the current initial vehicle height; and determines whether the difference between the vehicle height and the target height exceeds the preset error range. If it exceeds the preset error range, the second timer module 10 is started to start timing, and the air spring measurement and control device is used to adjust the vehicle height, and the new vehicle height, that is, the adjusted vehicle height, is collected in real time; if the difference between the new vehicle height and the target height is within the preset error range Or, when the timing duration of the second timer module 10 reaches the second preset duration, and the difference between the latest vehicle height and the target height does not exceed the preset error range, the third timer module 11 is controlled to start timing, and the second timer module 10 is controlled to return to zero. When the timing duration of the third timer module 11 reaches the third preset duration, the bench control module 1 turns off the air spring measurement and control device, and controls the third timer module 11 to return to zero; when the timing duration of the first timer module 9 reaches the first preset duration, the bench control module 1 is used to start the next operating condition of the bench, and the first timer module 9 is controlled to return to zero. The above process can complete the adjustment of the vehicle height between two adjacent operating conditions.

[0080] By adjusting the vehicle height through a separately set air spring measurement and control device, the accuracy of the vehicle height adjustment can be guaranteed; further, the first preset time is first used to constrain the overall interval time between two adjacent working conditions, so that the total time of all working condition tests and vehicle height adjustment of the entire project can be controlled, and the first preset time can be adjusted according to actual needs; secondly, the second preset time is used to constrain the duration of the vehicle height adjustment, and in order to ensure that all tests are successfully completed within the aforementioned total time, even if the vehicle height adjustment process is not completed within the second preset time, the air spring measurement and control device needs to be turned off to avoid the vehicle height adjustment exceeding the first preset time, which makes the total time longer and affects the test efficiency; finally, the third preset time is used to reserve a buffer time for the air spring measurement and control device to return to the shutdown state, so as to ensure the safety and stability of the vehicle height adjustment and avoid failure of the air spring measurement and control device.

[0081] Taking a certain project as an example, the test procedure of the vehicle structural durability road simulation test in this project is shown in Table 2; among them, when the test bench is running, it is executed in sequence according to Event1, Event2, ..., Event10 as a sub-cycle, and executed n times in total. The total durability test time is about 350 hours. The test requires that after each operation condition is completed, the vehicle body height is measured, judged and adjusted, and then the test is continued. In order not to affect the test cycle, the entire process is an automatic process without human intervention.

[0082] Table 2 Test procedures

[0083] Condition No. Condition Name Duration (seconds) Cycle times Event1 Belgium Road 56 400 Event2 Concrete Patch Road 24 400 Event3 Twisted Road 48 400 Event4 Bumpy Road 16 400 Event5 Ditch Road 16 400 Event6 26-inch pothole road 8 400 Event7 Wave Road 40 400 Event8 Belgium Road 2 24 400 Event9 Resonance Road 2 16 400 Event10 Changbo Road 24 400

[0084] Before the test begins, the height sensor module 2 of the air spring measurement and control device is installed between the wheel center and the wheel arch of the vehicle. When the test bench is stationary, the height sensor module 2 is reset to zero, and the current position is used as the reference, that is, as the target height. After each working condition is completed, the vehicle height error range is required to be ±3mm.

[0085] The test bench first runs the Belgian road for 56 seconds. When the operation is completed, the test bench control module 1 controls the test bench to stop running and sends a high-level signal S to the air spring measurement and control device. output , instructing the air spring measurement and control device to start working, and starting the timer unit to start timing. Here, the first preset time length is, for example, 16 seconds, and the second preset time length is, for example, 10 seconds.

[0086] If the current vehicle height obtained by the air spring measurement and control device is 1 mm, which meets the error range of ±3 mm, then wait for a third preset time, for example, 2 seconds, and then the air spring measurement and control device sends a high level signal S to the test bench control module 1. input , indicating that the air spring measurement and control device has completed its work, and the test bench control module 1 turns off the high-level signal S output When the end time of the first preset time is reached, the test bench control module 1 controls the test bench to continue the next working condition test.

[0087] If the current vehicle height is 4mm obtained by the air spring measurement and control device, which exceeds the error range of ±3mm, the air spring measurement and control device adjusts the vehicle height. If the vehicle height error range is within the second preset time, the third preset time is waited, and then the air spring measurement and control device sends a high-level signal S to the test bench control module 1. input , indicating that the air spring measurement and control device has completed its work, and the bench control module 1 turns off the high-level signal S output When the end time of the first preset time is reached, the test bench control module 1 controls the test bench to continue the next working condition test.

[0088] If the vehicle body height still exceeds the error range within the second preset time period, the air spring measurement and control device will be turned off at the end of the second preset time period. When the end of the first preset time period is reached, the test bench control module 1 controls the test bench to continue with the next working condition test.

[0089] Repeat the above steps until all working condition tests are completed.

[0090] Example 2

[0091] like Figure 2 As shown, the present invention provides an air spring measurement and control system for road simulation testing, which can implement the method described in the above embodiment, and the system includes:

[0092] The communication-connected test bench control module 1, the timer unit and the air spring measurement and control device;

[0093] A test bench control module 1, configured to control the test bench, the air spring measurement and control device and the start and stop of the timer unit;

[0094] a timer unit configured for timing;

[0095] The air spring measuring and controlling device is configured to detect and adjust the body height of the test vehicle.

[0096] Here, the type of the gantry control module 1 is, for example, an MTS329 series gantry controller.

[0097] Furthermore, the air spring measurement and control device comprises:

[0098] The height sensor module 2 is arranged between the wheel center and the wheel arch of the vehicle and is used to measure the height of the vehicle body; here, the type of the height sensor module 2 is, for example, a pull-wire displacement sensor, and its model is, for example, MT2A-30E033010K-C1A.

[0099] The data acquisition module 3 is configured to obtain the height of the vehicle body; here, the type of the data acquisition module 3 is, for example, a data acquisition card, and its model is, for example, Advantech eDAQ.

[0100] The device control module 4 is configured to control the regulating unit to adjust the vehicle height when the difference between the vehicle height and the target height exceeds a preset error range; here, the type of the device control module 4 is, for example, a programmable logic controller (PLC).

[0101] Furthermore, the adjustment unit comprises:

[0102] The first regulating module 5 is connected to the air spring 6 through an air pipe; the first regulating module 5 is configured to inflate the air spring 6, thereby raising the height of the vehicle body; here, the type of the first regulating module 5 is, for example, a boost pump.

[0103] The air circuit control module 7 is installed on the air pipe, and the air circuit control module 7 is configured to control the on-off of the first regulating module and the air spring 6; here, the type of the air circuit control module 7 is, for example, a solenoid valve.

[0104] The second regulating module 8 is installed on the air pipe and is located between the air circuit control module 7 and the air spring 6. The second regulating module 8 is configured to deflate the air spring 6 to lower the vehicle height. Here, the type of the second regulating module 8 is, for example, a proportional regulating valve.

[0105] Further, the timer unit comprises:

[0106] A first timer module 9 is configured to time the time from when the rack stops running to when it starts running next time;

[0107] A second timer module 10 is configured to adjust the vehicle height timing for the air spring measurement and control device;

[0108] The third timer module 11 is configured to time the air spring measurement and control device switching from the working state to the standby state.

[0109] Here, the first timer module 9 , the second timer module 10 and the third timer module 11 are of the type of, for example, ET200S timer modules.

[0110] Furthermore, the adjustment unit also includes: a pressure sensor module, which is installed on the air spring 6, and the device control module 4 is communicatively connected to the pressure sensor module, and the pressure sensor module plays a monitoring role; when the first adjustment module 5 inflates the air spring 6 or the second adjustment module 8 deflates the air spring 6, the pressure sensor module monitors the internal pressure of the air spring 6 in real time to prevent it from exceeding the rated pressure range of the air spring 6.

[0111] Example 3

[0112] The present invention also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements an air spring measurement and control method for road simulation testing as described in the above embodiment.

[0113] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A method for measuring and controlling an air spring for road simulation testing, characterized in that: The following steps are involved: When the test bench has completed the previous working condition, the control bench is stopped, the air spring measurement and control device is controlled to obtain the initial vehicle height of the test vehicle, and the first timer module (9) is controlled to start timing; When it is determined that the difference between the initial vehicle height and the target height exceeds a preset error range, the second timer module (10) is started to start timing, the air spring measurement and control device is controlled to enter a working state, the vehicle height of the test vehicle is adjusted, and a new vehicle height is obtained in real time; When the difference between the new vehicle body height and the target height is within a preset error range, or when the timing duration of the second timer module (10) reaches a second preset duration, the air spring measurement and control device is controlled to enter a standby state, and the third timer module (11) is controlled to start timing and the second timer module (10) is controlled to return to zero; When the timing duration of the third timer module (11) reaches a third preset duration, the air spring measurement and control device is controlled to enter a shutdown state, and the third timer module (11) is controlled to return to zero; When the timing duration of the first timer module (9) reaches a first preset duration, the control rack operates in the next working condition and controls the first timer module (9) to return to zero; After controlling the first timer module (9) to start timing, the following steps are also included: When it is determined that the difference between the initial vehicle height and the target height does not exceed a preset error range, controlling a third timer module (11) to start timing; When the timing duration of the third timer module (11) reaches a third preset duration, the air spring measurement and control device is controlled to enter a shutdown state, and the third timer module (11) is controlled to return to zero; The method for judging that the test bench has completed the last working condition includes the following steps: Obtain the current test conditions of the test bench and monitor its running time in real time; Calling a test database to query the test duration corresponding to a working condition consistent with the current test working condition; the test database at least includes: multiple working conditions and corresponding test durations; When the operating time of the test bench reaches the corresponding test time, it is determined that the test bench has completed the previous operating condition.

2. The air spring measurement and control method for road simulation test according to claim 1, characterized in that: The air spring measurement and control device adjusts the vehicle height of the test vehicle by the following method: If the difference between the current vehicle height and the target height is less than the first difference, the air spring measurement and control device is controlled to inflate the air spring of the test vehicle, thereby raising the vehicle height; If the difference between the current vehicle body height and the target height is greater than a second difference, the air spring measurement and control device deflates the air spring of the test vehicle to thereby lower the vehicle body height; the second difference is greater than the first difference.

3. An air spring measurement and control system for road simulation testing, capable of implementing the method described in claim 1 or 2, characterized in that: The system comprises: A test bench control module (1), a timer unit and an air spring measurement and control device connected in communication; The platform control module (1) is configured to control the platform, the air spring measurement and control device, and the start and stop of the timer unit; The timer unit is configured to measure time; The air spring measurement and control device is configured to detect and adjust the vehicle height of the test vehicle; The timer unit comprises: A first timer module (9) is configured to time the time from when the rack stops running to when it starts running next time; A second timer module (10) configured to adjust the vehicle height timing for the air spring measurement and control device; The third timer module (11) is configured to time the switching of the air spring measurement and control device from the working state to the standby state.

4. The air spring measurement and control system for road simulation testing according to claim 3, characterized in that: The air spring measurement and control device comprises: A height sensor module (2), the height sensor module (2) being arranged between a wheel center and a wheel arch of a vehicle and being used to measure a vehicle body height; A data acquisition module (3) configured to obtain the vehicle body height measured by the height sensor module (2); The device control module (4) is configured to control the regulating unit to adjust the height of the vehicle body when the difference between the vehicle body height and the target height exceeds a preset error range.

5. The air spring measurement and control system for road simulation testing according to claim 4, characterized in that: The adjustment unit comprises: A first regulating module (5), the first regulating module (5) being in communication with the air spring (6) via an air pipe; the first regulating module (5) being configured to inflate the air spring (6) and thereby raise the height of the vehicle body; an air circuit control module (7), the air circuit control module (7) being mounted on the air pipe, the air circuit control module (7) being configured to control the on-off connection between the first regulating module and the air spring (6); A second regulating module (8), the second regulating module (8) being mounted on the air pipe and located between the air path control module (7) and the air spring (6), the second regulating module (8) being configured to deflate the air spring (6) and thereby lower the height of the vehicle body.

6. A computer-readable storage medium, the computer-readable storage medium having a computer program, characterized in that: When the computer program is executed by the processor, the steps of the air spring measurement and control method for road simulation testing as described in claim 1 or 2 are implemented.

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