Test method and test equipment

Abstract

The invention relates to the technical field of vehicle chassis, provides a test method and test equipment, and is suitable for carrying out durability test on an air spring. The test method comprises the following steps: acquiring current test working condition configuration, wherein the current test working condition configuration comprises test sub-working conditions corresponding to at least two working condition parameters; and according to each test sub-working condition, adjusting each working condition parameter of the air spring, respectively controlling the air spring to act, and recording an action result corresponding to each working condition parameter. And under the condition that each action result meets a preset requirement, measuring durability data of the air spring. And after the durability data measurement is completed, obtaining the next test working condition configuration of the air spring, and carrying out the next durability test on the air spring. According to the test method, each working condition parameter of the air spring in the durability test can be automatically controlled and adjusted, and the next durability test is automatically switched under the condition that the current durability test is completed, so that the test efficiency of the durability test of the air spring is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle chassis technology, and in particular to a testing method and testing equipment. Background Technology

[0002] Air springs are a core component of vehicle suspension systems. They can dampen vibrations and adjust vehicle height by adjusting the gas inside the air chamber. Their performance directly determines the stability of the suspension system. Therefore, it is necessary to conduct durability tests on air springs, which involves making the air springs operate under different conditions to test their durability.

[0003] In related technologies, the durability test of air springs relies on real-time manual monitoring, with staff confirming whether it is necessary to switch the values ​​of various operating parameters and then making the switch.

[0004] However, in related technologies, due to the numerous operating parameters involved in air spring durability testing, operators need to pause the test and confirm the necessary adjustments before determining whether to switch parameter values. This leads to a longer testing cycle and lower testing efficiency. Summary of the Invention

[0005] In view of this, this application aims to propose a testing method to improve the testing efficiency of air spring durability testing.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] A test method suitable for performing durability tests on air springs, the test method comprising:

[0008] Obtain the current test condition configuration, which includes at least two test sub-conditions corresponding to test condition parameters;

[0009] According to each of the test sub-conditions, the parameters of each condition in which the air spring is located are adjusted, and the air spring is controlled to move, and the action results corresponding to each of the conditions are recorded.

[0010] If the results of each action meet the preset requirements, measure the durability data of the air spring;

[0011] After the durability data measurement is completed, the next test condition configuration of the air spring is obtained, and the air spring is subjected to the next durability test.

[0012] Furthermore, the operating parameters include temperature operating parameters, hydraulic operating parameters, pneumatic operating parameters, and steering operating parameters. Adjusting the operating parameters of the air spring according to each of the test sub-operating conditions includes:

[0013] Adjust the ambient temperature at the location of the air spring according to the test sub-condition corresponding to the temperature condition parameters.

[0014] Adjust the load pressure borne by the air spring according to the test sub-condition corresponding to the hydraulic operating parameters;

[0015] Adjust the air pressure inside the air spring according to the test sub-condition corresponding to the air pressure operating parameters;

[0016] Adjust the steering torque on the air spring according to the test sub-condition corresponding to the steering parameters.

[0017] Furthermore, the test sub-conditions corresponding to the temperature condition parameters include multiple preset test temperatures, and first threshold values ​​corresponding to each preset test temperature.

[0018] The step of adjusting the ambient temperature at the location of the air spring according to the test sub-condition corresponding to the temperature condition parameters includes:

[0019] According to the setting order of each preset test temperature, the ambient temperature at the location of the air spring is controlled to be switched sequentially to each preset test temperature according to a preset switching strategy.

[0020] Furthermore, the preset switching strategy includes:

[0021] If the current preset test temperature is detected to meet the preset switching conditions, the ambient temperature at the location of the air spring is controlled to switch to the next preset test temperature;

[0022] The preset switching conditions include:

[0023] The number of times the air spring operates at the current preset test temperature reaches the first threshold number corresponding to the current preset test temperature.

[0024] Furthermore, the test sub-conditions corresponding to the hydraulic operating condition parameters include multiple preset test hydraulic pressures, and a second threshold value corresponding to each preset test hydraulic pressure.

[0025] The test sub-conditions corresponding to the air pressure condition parameters include multiple preset test air pressures, and a third threshold number corresponding to each preset test air pressure;

[0026] The test sub-conditions corresponding to the steering condition parameters include multiple preset test steerings, and a fourth number threshold corresponding to each preset test steering.

[0027] Specifically, determining whether each action result meets the preset requirements based on the recorded action results corresponding to each of the aforementioned working condition parameters includes:

[0028] Based on the action results corresponding to each of the aforementioned working condition parameters, the actual number of actions of the air spring under each of the aforementioned preset test temperatures, preset test hydraulic pressures, preset test air pressures, and preset test directions is determined.

[0029] Based on the actual number of times the air spring is activated, and the corresponding first number threshold, second number threshold, third number threshold, and fourth number threshold, it is determined whether each action result meets the preset requirements.

[0030] Furthermore, determining whether the results of each action meet the preset requirements includes:

[0031] Based on the actual number of times the air spring operates, the total number of temperature-related operations, the total number of hydraulic operations, the total number of air pressure operations, and the total number of steering operations under each preset test temperature, preset test hydraulic pressure, preset test air pressure, and preset test steering direction are determined respectively.

[0032] Based on each of the first number threshold, each of the second number threshold, each of the third number threshold, and each of the fourth number threshold, the total number of temperature count threshold, the total number of hydraulic count threshold, the total number of air pressure count threshold, and the total number of steering count threshold are determined respectively.

[0033] Based on the total number of temperature actions, the total number of hydraulic actions, the total number of pneumatic actions, the total number of steering actions, the total number of temperature actions, the total number of hydraulic actions, the total number of pneumatic actions, and the total number of steering actions, determine whether each action result meets the preset requirements.

[0034] Furthermore, the method also includes:

[0035] Based on the judgment result of whether the result of each action meets the preset requirements, the working condition status identifier is determined;

[0036] If the operating condition status identifier is a preset completion identifier, the durability test of the air spring under the current test condition is determined to be completed.

[0037] Furthermore, determining the operating condition status identifier based on the judgment result of whether each of the action results meets the preset requirements includes:

[0038] If the results of each action meet the preset requirements and the air spring returns to the preset initial state, the working condition identifier is assigned a preset completion identifier.

[0039] Furthermore, the testing method also includes:

[0040] After completing the durability data measurement, the operating condition status identifier is switched to the preset incomplete identifier.

[0041] Compared with related technologies, this application has the following advantages:

[0042] The testing method described in this application controls the movement of the air spring and adjusts the parameters of each working condition of the air spring according to each test sub-working condition in the current test working condition configuration. It also detects whether the movement result of the air spring meets the preset requirements. If the preset requirements are met, it measures the durability data of the air spring and automatically iterates to perform the next durability test. This enables automated durability testing of the air spring without the need for manual pausing of the test to confirm whether the working condition parameter values ​​need to be changed. This saves the time of manual pausing of the test for confirmation, shortens the test cycle, improves test efficiency, and saves manpower.

[0043] Meanwhile, this application also adjusts the ambient temperature, load pressure, air pressure inside the air spring, and steering torque of the air spring, so as to realize the durability test of the air spring under multi-dimensional working conditions, so as to simulate the diverse working conditions that the air spring actually operates under, thereby improving the reliability of the durability test.

[0044] Meanwhile, this application can automatically switch the ambient temperature of the air spring sequentially according to a preset switching strategy, enabling stepped or cyclic testing of temperature parameters without manual switching, thus improving the efficiency of air spring durability testing. Furthermore, this sequential temperature switching method ensures the orderly nature of the testing and facilitates management.

[0045] Meanwhile, in this application, when the air spring's action at the current preset test temperature reaches the preset switching condition, it switches to the next preset test temperature. This allows the air spring to complete a sufficient number of action verifications at each preset test temperature, improving the reliability of the durability test. Furthermore, by automatically switching between preset test temperatures based on the preset switching condition, the testing efficiency can be improved compared to manual switching.

[0046] Meanwhile, this application also uses a working condition status identifier to visually display the current durability test progress. Furthermore, by automatically switching the working condition status identifier, the next durability test can be automatically initiated, reducing process interruptions caused by manual switching of working conditions, thereby helping to shorten the durability test cycle of the air spring.

[0047] Meanwhile, in this application, after the current durability test operation is completed, the working condition of the air spring is restored to the preset initial state to ensure that each round of durability test starts with a unified preset initial state, avoiding the deviation of the initial conditions of the next round of test due to the residual working conditions such as high temperature and high pressure of the previous round of test, thereby making multiple sets of test data have a comparable basis.

[0048] Another object of this application is to provide a testing device suitable for performing durability tests on air springs. The testing device includes: a processor;

[0049] Memory, used to store computer programs;

[0050] When the computer program is executed by the processor, the processor performs the above-described testing method.

[0051] The testing equipment described in this application can automatically perform durability tests on air springs by executing the above-described testing method, thereby improving the testing efficiency of air spring durability tests. Attached Figure Description

[0052] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0053] Figure 1 This is a flowchart illustrating the testing method described in an embodiment of this application;

[0054] Figure 2 This is a flowchart illustrating the adjustment of various operating parameters in the testing method described in the embodiments of this application;

[0055] Figure 3 This is a flowchart illustrating the process of determining whether a preset requirement is met in the testing method described in the embodiments of this application.

[0056] Figure 4 This is a schematic diagram illustrating the specific process of determining whether the results of each action meet the preset requirements in the testing method described in the embodiments of this application;

[0057] Figure 5 This is a flowchart illustrating the process of determining the operating condition status identifier in the test method described in the embodiments of this application;

[0058] Figure 6 This is a schematic diagram of the overall process of the testing method described in the embodiments of this application;

[0059] Figure 7 This is a schematic diagram of the structure of the testing equipment described in the embodiments of this application;

[0060] Explanation of reference numerals in the attached figures:

[0061] 710. Processor; 720. Memory. Detailed Implementation

[0062] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0063] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0064] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0066] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0068] An embodiment of the first aspect of this application provides a testing method for performing durability testing on an air spring. This testing method controls the air spring's movement through various test sub-conditions in the current test configuration, and measures the air spring's durability data when the air spring's movement results meet preset requirements. After completing the durability data measurement, it automatically iterates to perform the next durability test, thereby achieving automated durability testing of the air spring and saving manpower.

[0069] In related technologies, air springs are key components in vehicle chassis, integrated into the vehicle suspension system, and are usually installed at the connection between the frame and the axle to support the vehicle body and buffer vibrations during driving.

[0070] An air spring typically consists of an elastic air chamber, a piston rod, and a sealed air cell. The air chamber is filled with high-pressure air as the elastic medium. The state of the gas inside the air spring determines the amount of support force it can provide to the vehicle body.

[0071] When a vehicle encounters uneven road surfaces, its air springs absorb impact energy through dynamic changes in air pressure within the airbags. Specifically, during the compression stroke, the air chamber volume decreases, leading to increased air pressure and generating a supporting force to cushion vibrations. During the rebound stroke, the released air pressure pushes the piston back to its original position, maintaining tire contact with the road. By adjusting the air pressure within the airbags (which can be controlled automatically or manually), vehicle height adjustment can be achieved, allowing the vehicle to maintain a stable posture under different loads and road conditions.

[0072] If an air spring malfunctions, such as due to structural damage, it may cause the suspension system to fail, thereby affecting vehicle stability. Therefore, it is necessary to test the durability of the air spring. This involves subjecting the air spring to various operating conditions and then measuring the gas pressure and other state data within the air spring to assess its durability.

[0073] For example, the air spring can be subjected to high temperature, large amplitude and high frequency conditions to perform durability tests.

[0074] In related technologies, durability testing of air springs typically requires subjecting them to continuous operation under multiple temperature and pressure conditions. During this durability test, manual adjustment of the air spring's parameters (such as temperature switching and pressure) is usually the responsibility of the operator.

[0075] Specifically, in this technology, staff need to monitor the testing process in real time to confirm whether the action has been completed and whether it is necessary to switch operating parameters. At each confirmation point, staff need to pause the test to check the various operating parameters and the air spring's motion data, and comprehensively confirm whether it is necessary to switch the operating parameter values. Because this technology requires pausing the test to wait for staff confirmation, and there are many operating parameters, manual confirmation is time-consuming, resulting in a long pause process and consequently low testing efficiency.

[0076] Furthermore, the values ​​of each operating condition parameter are controlled by its corresponding operating condition parameter control system. In related technologies, when switching operating condition parameter values, the control systems of each operating condition parameter are mostly adjusted manually. However, there are many operating condition parameters, and the adjustments of each operating condition parameter are not synchronized, which leads to a long time consumption during switching, resulting in low testing efficiency.

[0077] In view of this, and to overcome the shortcomings of related technologies, the test method of this embodiment is used to perform durability testing on air springs. In this test method, the following is combined with... Figure 1 In terms of overall design, it includes the following steps S110-S140.

[0078] Step S110: Obtain the current test condition configuration.

[0079] Specifically, when conducting durability tests on air springs, it is usually necessary to make the air spring operate under various different working conditions so that the air spring can perform corresponding durability test operations under each working condition. After the durability test operations are completed, the durability data of the air spring is tested to measure the performance of the air spring after completing the durability test operations. Then the current durability test ends.

[0080] In step S110, the current test condition configuration is the configuration that describes the requirements for the durability test operation of the air spring in the current durability test. This configuration can be pre-configured by the operator and stored in memory, and retrieved from memory during the current durability test.

[0081] Furthermore, when conducting durability tests on air springs, it is necessary to make the air springs operate under various combinations of working conditions, such as different temperatures, different load pressures, different air pressures, and different steering torques. The current test working condition configuration includes the requirements for various working condition parameters of the air spring, such as temperature, load pressure, air pressure, and steering torque.

[0082] Specifically, the current test condition configuration includes at least two test sub-conditions corresponding to different operating parameters. Each test sub-condition corresponds to one operating parameter. For example, the operating parameters are divided into temperature operating parameters, hydraulic operating parameters, pneumatic operating parameters, and steering operating parameters. The current test condition configuration includes temperature test sub-conditions, hydraulic test sub-conditions, pneumatic test sub-conditions, and steering test sub-conditions.

[0083] Among them, the temperature operating condition parameter refers to the ambient temperature parameter of the air spring durability test, which is used to simulate the operation of the air spring in cold, normal and high temperature environments.

[0084] Hydraulic operating parameters refer to the load pressure parameters that the air springs bear, used to simulate the load requirements of a vehicle under no-load, half-load, and full-load conditions.

[0085] The air pressure operating parameters refer to the air pressure parameters inside the air spring's elastic air bladder, used to simulate the height adjustment function of the air spring.

[0086] Steering parameters refer to the steering torque parameters that the air springs bear, which are used to simulate the force state of the air springs when the vehicle is turning.

[0087] More specifically, each test sub-condition includes the condition parameter setting value corresponding to the condition parameter and the corresponding action target.

[0088] The operating condition parameter setting value represents the operating condition parameter value required for the air spring in the current durability test. For example, the operating condition parameter setting value for the temperature test sub-condition is the preset test temperature, which means that the air spring needs to operate at the preset test temperature.

[0089] The action target indicates the action requirements that the air spring needs to complete under the corresponding operating conditions. When the air spring's action under the corresponding operating conditions meets the action target, it means that the air spring has completed the durability test operation corresponding to the test sub-condition.

[0090] For example, the temperature test sub-condition will be used as an example for explanation. The test sub-conditions corresponding to other operating parameters can be referred to this temperature test sub-condition, and will not be repeated here. When the air spring is at the operating parameter setting value corresponding to the temperature test sub-condition, if the movement of the air spring reaches the movement target corresponding to the temperature test sub-condition, it means that the durability test operation of the air spring under the temperature test sub-condition is completed.

[0091] Conversely, if the corresponding action target is not achieved, it indicates that the durability test operation of the air spring under the temperature test sub-condition is not completed, and the air spring needs to continue to operate until the durability test operation corresponding to the temperature test sub-condition is completed.

[0092] Step S120: Adjust the parameters of each working condition of the air spring according to each test sub-condition, control the movement of the air spring respectively, and record the action results corresponding to each working condition parameter.

[0093] The action result refers to the actual action data of the air spring, such as the number of actions. Each operating condition parameter corresponds to one action result, specifically, the actual action data when the air spring is subjected to the corresponding operating condition parameter. For example, if the action result is the number of actions, then assuming that the temperature parameter setting value corresponding to the temperature test sub-condition is applied during the 201st to 500th actions of the air spring, the action result corresponding to this temperature operating condition parameter could be 300 actions. Similarly, if the hydraulic parameter setting value corresponding to the hydraulic test sub-condition is applied during the 301st to 400th actions of the air spring, the action result corresponding to this hydraulic operating condition parameter could be 100 actions.

[0094] Thus, in step S120, the various operating parameters of the air spring are controlled, and the air spring is made to act under the corresponding operating conditions. The actual action state data of the air spring under each operating parameter is collected, and the action result corresponding to each operating parameter can be obtained.

[0095] For example, in step S120, during the control of the air spring's operation, the number of times the air spring operates when the corresponding temperature condition parameter is applied, the number of times it operates when the hydraulic condition parameter is applied, the number of times it operates when the pneumatic condition parameter is applied, and the number of times it operates when the steering condition parameter is applied are collected to obtain the operation results corresponding to the temperature condition parameter, the hydraulic condition parameter, the pneumatic condition parameter, and the steering condition parameter.

[0096] Furthermore, in step S120, when adjusting and controlling the various operating parameters of the air spring, different operating parameters are regulated by their respective operating parameter control systems. For example, temperature is regulated by a temperature control system, hydraulic pressure is regulated by a hydraulic actuator control system, air pressure is regulated by an air pressure control system, and steering torque is regulated by a steering control system.

[0097] In step S120, a corresponding operating condition control signal can be output to the corresponding operating condition parameter control system based on the test sub-operating condition (more specifically, based on the operating condition parameter setting value in the test sub-operating condition), so that the operating condition parameter control system adjusts the operating condition parameter of the air spring to the corresponding operating condition parameter setting value, thereby completing the adjustment of the operating condition of the air spring.

[0098] It is worth noting that when adjusting the operating parameters of the air spring, each operating condition parameter control system adjusts according to its corresponding test sub-condition, independently of each other, and can be applied simultaneously. For example, while the temperature control system controls the temperature of the air spring to the set temperature value, the hydraulic actuator control system can simultaneously control the hydraulic pressure of the air spring to the corresponding hydraulic pressure set value, and so on.

[0099] Step S130: If the results of each action meet the preset requirements, measure the durability data of the air spring.

[0100] The preset requirement is the standard for judging whether the air spring has completed the current required durability test operation. Specifically, it can be that the action results of the air spring in each test sub-condition meet the corresponding action target.

[0101] In other words, if the air spring meets the target action for each test sub-condition, it means it meets the preset requirements. If the target action for at least one condition parameter is not met, it means it does not meet the preset requirements.

[0102] Furthermore, if the preset requirements are met, it indicates that the durability test of the air spring under each test sub-condition has been completed. After that, the durability data of the air spring can be tested to measure the performance of the air spring based on the durability data, and the current durability test is completed.

[0103] Conversely, if the preset requirements are not met, it indicates that the durability test of the air spring under each test sub-condition has not been completed. Step S120 needs to be executed to continue to make the air spring operate and carry out the durability test until the results of each action meet the preset requirements and the required durability test operation is completed.

[0104] This continues until the air spring completes the action target corresponding to each working condition parameter, that is, when the air spring completes the durability test operation required by each test sub-working condition, indicating that the current durability test is completed, and the durability data of the air spring is measured, thus completing the current durability test.

[0105] Among them, the durability data is the core indicator data reflecting the durability performance of the air spring. For example, the cumulative number of actions, air pressure data (air pressure decay rate), piston rod wear, airbag fatigue damage value, and time of abnormal noise occurrence can be obtained by testing with professional testing equipment (such as air tightness tester and wear measurement instrument) after the action results of the air spring meet the preset requirements.

[0106] Step S140: After the durability data measurement is completed, obtain the next test condition configuration of the air spring and perform the next durability test on the air spring.

[0107] Specifically, in step S140, after the durability data measurement is completed, it indicates that the current durability test is completed, and the next test condition configuration of the air spring is automatically obtained, and the air spring is subjected to the next durability test.

[0108] Thus, through steps S110-S140 above, the air spring's movement is controlled and the parameters of each working condition of the air spring are automatically adjusted according to the various test sub-working conditions in the current test working condition configuration. The air spring's movement results are automatically detected to ensure they meet the preset requirements. If the preset requirements are met, the air spring's durability data is measured, and the next durability test is automatically iterated. This enables automated durability testing of the air spring without the need for manual pause testing to confirm whether the working condition parameter values ​​need to be changed. This saves the time spent manually pausing the test for confirmation, shortens the test cycle, improves test efficiency, and saves manpower.

[0109] Continue by Figure 1 and combined Figure 2 As shown, in step S120 above, the parameters of each working condition of the air spring are adjusted according to each test sub-working condition, which may specifically include the following steps S121-S124.

[0110] Step S121: Adjust the ambient temperature at the location of the air spring according to the test sub-condition corresponding to the temperature condition parameters.

[0111] Specifically, in step S121, the temperature parameter setting value is determined according to the test sub-condition corresponding to the temperature condition parameter, that is, the temperature test sub-condition. Then, the corresponding temperature control signal is output to the temperature control system according to the temperature parameter setting value, so that the temperature control system adjusts the ambient temperature at the location of the control air spring.

[0112] Furthermore, the temperature parameter setting can include multiple preset test temperatures, for example, the multiple preset test temperatures included in the temperature test sub-condition are -20℃, 50℃, and 70℃ respectively.

[0113] When a temperature test sub-condition includes multiple preset test temperatures, the action target for that temperature test sub-condition includes the first count threshold for each preset test temperature. For example, the first count threshold for -20℃ is 1000 times, the first count threshold for 50℃ is 2000 times, the first count threshold for 70℃ is 2000 times, and the total action target is 5000 times.

[0114] Specifically, in the case where the temperature test sub-condition includes multiple preset test temperatures and the first number threshold corresponding to each preset test temperature, in step S121, the ambient temperature at the location of the air spring is adjusted according to the test sub-condition corresponding to the temperature condition parameters. Specifically, this may include: according to the setting order of each preset test temperature, controlling the ambient temperature at the location of the air spring to be switched sequentially to each preset test temperature according to a preset switching strategy.

[0115] Specifically, the setting sequence can be based on the preset test temperature from low to high, such as -20℃, 50℃, and 70℃. First, set the ambient temperature of the air spring location to -20℃, then switch to 50℃ according to the preset switching strategy, and then switch to 70℃.

[0116] Furthermore, the setting order can be from high to low, or it can be a manually set order based on needs. Additionally, this setting order can be combined with the parameter settings of other operating conditions, taking into account different combinations of operating condition parameters. For example, it could be -20℃ 500 cycles, 50℃ 1000 cycles, -20℃ 500 cycles, 70℃ 1000 cycles, 50℃ 1000 cycles, and 70℃ 1000 cycles.

[0117] This automatic switching of the ambient temperature of the air spring according to a preset switching strategy enables stepped or cyclical testing of temperature parameters without manual switching, thus improving the efficiency of air spring durability testing. Furthermore, this method of controlling the temperature switching sequentially ensures the orderly nature of the testing and facilitates management.

[0118] In some exemplary embodiments, the aforementioned preset switching strategy may specifically include: when the current preset test temperature is detected to meet the preset switching conditions, controlling the ambient temperature at the location of the air spring to switch to the next preset test temperature.

[0119] The preset switching conditions include: the number of times the air spring moves at the current preset test temperature reaches the threshold number corresponding to the first time at the current preset test temperature.

[0120] Continuing with the above temperature test sub-conditions, the threshold for the first test count is 1000 for -20℃, 2000 for 50℃, and 2000 for 70℃, as examples for further explanation.

[0121] Assuming the preset test temperature is set from low to high, according to the preset switching strategy, the ambient temperature of the air spring is first set to -20℃, and the air spring is made to operate 1000 times at -20℃. Based on the operation data, it is determined that the current preset test temperature meets the preset switching conditions after the air spring has operated 1000 times at -20℃. Then, the ambient temperature of the air spring is switched to the next preset test temperature, which is 50℃. Similarly, the air spring is made to operate 2000 times at 50℃. Then, the ambient temperature of the air spring is switched to 70℃, and the air spring is made to operate 2000 times at 70℃. After this, the test at the last preset test temperature is completed, which means that the air spring has completed the durability test operation required by the temperature test sub-condition.

[0122] Therefore, when the air spring's action at the current preset test temperature meets the preset switching conditions, switching to the next preset test temperature allows the air spring to complete a sufficient number of action verifications at each preset test temperature, improving the reliability of the durability test. Furthermore, the automatic switching between preset test temperatures based on the preset switching conditions also improves testing efficiency compared to manual switching.

[0123] Furthermore, assuming the set sequence is a series of alternating temperature values, such as -20℃ 500 times, 50℃ 1000 times, -20℃ 500 times, 70℃ 1000 times, 50℃ 1000 times, 70℃ 1000 times, then the preset switching strategy can be: According to the set sequence, determine the temperature sequence (e.g., [-20℃, 50℃, -20℃, 70℃, 50℃, 70℃]), number each temperature in the sequence sequentially, and determine the target number of actuations corresponding to each number. At the temperature corresponding to the current number, if the number of actuations of the air spring reaches the target number of actuations for that number, increment the current number by one, switch to the next number, determine the temperature value corresponding to the next number, and control the application of that temperature value to the air spring. Determine if the target number of actuations for that temperature value has been reached. Repeat this process until the air spring completes the target number of actuations at the last temperature value, thus completing the durability test of the air spring at that temperature.

[0124] The ambient temperature of the air spring can be adjusted through the above step S121. The adjustment of load pressure, air pressure and steering torque can be achieved through the following steps S122-S124.

[0125] Step S122: Adjust the load pressure borne by the air spring according to the test sub-condition corresponding to the hydraulic operating condition parameters.

[0126] Step S123: Adjust the air pressure inside the air spring according to the test sub-condition corresponding to the air pressure operating condition parameters.

[0127] Step S124: Adjust the steering torque on the air spring according to the test sub-condition corresponding to the steering condition parameters.

[0128] It is worth noting that the sequence numbers of steps S121-S124 do not imply any restriction on the execution order of steps S121-S124. For example, steps S121-S124 can be executed simultaneously or sequentially, and no restriction is imposed here.

[0129] Through steps S121-S124, the ambient temperature, load pressure, air pressure inside the air spring, and steering torque of the air spring are adjusted to achieve durability testing of the air spring under multi-dimensional working conditions, thereby simulating the diverse working conditions that the air spring actually experiences, and thus improving the reliability of the durability test.

[0130] In steps S122-S124, the adjustment of the load pressure borne by the air spring, the adjustment of the air pressure inside the air spring, and the adjustment of the steering torque received by the air spring can all refer to the process of adjusting the ambient temperature of the air spring in step S121 above.

[0131] Specifically, similar to the temperature operating condition parameter, the test sub-condition corresponding to this hydraulic operating condition parameter, i.e., the hydraulic test sub-condition, can include multiple preset test hydraulic pressures and a second threshold number corresponding to each preset test hydraulic pressure. When adjusting the load pressure borne by the air spring, the system switches to each preset test hydraulic pressure sequentially according to the hydraulic pressure setting order of the multiple preset test hydraulic pressures. When the air spring completes the number of actions corresponding to the second threshold number under the current preset test hydraulic pressure, the system switches to the next preset test hydraulic pressure.

[0132] The air pressure test sub-condition corresponding to this air pressure operating condition parameter includes multiple preset test air pressures and a third threshold number corresponding to each preset test air pressure. Similarly, when adjusting the gas pressure of the air spring, the gas pressure of the air spring is switched sequentially to each preset test air pressure according to the air pressure setting order of the multiple preset test air pressures. Specifically, when the air spring completes the corresponding third threshold number of actions under the current preset test air pressure, it switches to the next preset test air pressure.

[0133] The steering test sub-conditions corresponding to the steering condition parameters include multiple preset test steerings and a fourth threshold number corresponding to each preset test steering. Similarly, when adjusting the steering torque on the air spring, the steering torque on the air spring is switched sequentially to each preset test steering according to the air pressure setting order of the multiple preset test steerings. When the air spring completes the corresponding fourth threshold number of actions under the current preset test steering, it switches to the next preset test steering.

[0134] That is, in this embodiment, when the current durability test begins, the air spring is controlled to start operating. At the same time, the ambient temperature, the load pressure, the gas pressure inside the air spring, and the steering torque of the air spring are adjusted according to the temperature setting sequence of each preset test temperature, the hydraulic pressure setting sequence of each preset test hydraulic pressure, the air pressure setting sequence of each preset test air pressure, and the steering setting sequence of each preset test direction, so as to realize the working condition control of the air spring during the current durability test.

[0135] Continue by Figures 1-2 and combined Figure 3 As shown, when determining whether each action result meets the preset requirements based on the recorded action results corresponding to each working condition parameter, this can be achieved through the following steps S310-S320.

[0136] Step S310: Based on the action results corresponding to each working condition parameter, determine the actual number of actions of the air spring under each preset test temperature, each preset test hydraulic pressure, each preset test air pressure, and each preset test steering.

[0137] For example, taking the temperature operating condition parameter as an example, the action result corresponding to the temperature operating condition parameter includes all the action state data when the ambient temperature of the air spring is at each preset test temperature. It includes the data of each action of the air spring at each preset test temperature. Therefore, in step S130, the actual number of actions of the air spring at each preset test temperature can be determined according to the action result corresponding to the temperature operating condition parameter.

[0138] For example, if the air spring actually operates 1000 times at -20℃, 2000 times at 50℃, and 2000 times at 70℃, then the actual number of operations at -20℃ is 1000, the actual number of operations at 50℃ is 2000, and the actual number of operations at 70℃ is 2000.

[0139] Similarly, the actual number of times the air spring operates under each preset test hydraulic pressure can be determined based on the corresponding action results of the hydraulic operating parameters. The actual number of times the air spring operates under each preset test air pressure can also be determined based on the corresponding action results of the pneumatic operating parameters. Furthermore, the actual number of times the air spring operates under each preset test steering condition can be determined based on the corresponding action results of the steering operating parameters.

[0140] Step S320: Based on the actual number of times the air spring is activated, and the corresponding thresholds for the first, second, third, and fourth activations, determine whether the results of each activation meet the preset requirements.

[0141] Specifically, based on the actual number of times the air spring operates at each preset test temperature, and the first count threshold corresponding to each preset test temperature, it can be determined whether the durability test of the air spring under temperature operating parameters has been completed.

[0142] Similarly, based on the actual number of times the air spring operates under each preset test hydraulic pressure and the second threshold number corresponding to each preset test hydraulic pressure, it can be determined whether the durability test of the air spring under hydraulic operating parameters has been completed.

[0143] Similarly, based on the actual number of times the air spring operates under each preset test air pressure, and the threshold number of the third test under each preset test air pressure, it can be determined whether the durability test of the air spring under the air pressure operating parameters has been completed.

[0144] Similarly, based on the actual number of times the air spring moves under each preset test steering angle, and the fourth number threshold corresponding to each preset test steering angle, it can be determined whether the durability test of the air spring under steering parameters has been completed.

[0145] When the durability test of the air spring is completed under temperature, hydraulic, pneumatic and steering parameters, it means that the results of each action meet the preset requirements, that is, the current durability test is over, the fatigue of the air spring has reached the target, and then the durability data of the air spring can be tested. After the test is completed, the current durability test ends.

[0146] In this way, by using steps S310 and S320, the actual number of actions corresponding to the four working condition parameters of temperature, hydraulic pressure, air pressure, and steering is compared with the corresponding threshold number to determine whether the action result of the air spring meets the standard. This enables the air spring to undergo durability testing under multi-dimensional working conditions, thereby simulating the diverse working conditions that the air spring actually operates under, and thus improving the reliability of the durability test.

[0147] Continue by Figure 3 and combined Figure 4In some exemplary embodiments, in step S320 above, based on the actual number of times the air spring is activated and the corresponding first number threshold, second number threshold, third number threshold and fourth number threshold, it is determined whether each action result meets the preset requirements, which may specifically include the following steps S321-S323.

[0148] Step S321: Based on the actual number of times the air spring moves, determine the total number of temperature-related movements of the air spring at each preset test temperature, the total number of hydraulic movements at each preset test hydraulic pressure, the total number of air pressure movements at each preset test air pressure, and the total number of steering movements at each preset test steering direction.

[0149] Specifically, in step S321, the total number of actions at each preset test temperature is the sum of the actual number of actions corresponding to each preset test temperature. Similarly, the total number of actions at each preset test hydraulic pressure is the sum of the actual number of actions corresponding to each preset test hydraulic pressure. The total number of actions at each preset test air pressure is the sum of the actual number of actions corresponding to each preset test air pressure. The total number of actions at each preset test steering is the sum of the actual number of actions corresponding to each preset test steering.

[0150] For example, taking temperature parameters as an example, the actual number of times the air spring operates at temperatures of -20℃, 50℃, and 70℃ are 1000, 2000, and 2000 respectively. Therefore, the total number of times the air spring operates at each preset test temperature is 5000 (equal to 1000 + 2000 + 2000).

[0151] Step S322: Determine the total number of temperature counts, total number of hydraulic counts, total number of air pressure counts, and total number of steering counts based on the first count threshold, the second count threshold, the third count threshold, and the fourth count threshold.

[0152] Step S323: Based on the threshold values ​​for total temperature action, total hydraulic action, total pneumatic action, total steering action, total temperature action, total hydraulic action, total pneumatic action, and total steering action, determine whether the results of each action meet the preset requirements.

[0153] Specifically, if the total number of temperature actions is not less than the temperature action threshold, the total number of hydraulic actions is not less than the hydraulic action threshold, the total number of pneumatic actions is not less than the pneumatic action threshold, and the total number of steering actions is not less than the steering action threshold, then the result of each action is determined to meet the preset requirements.

[0154] Specifically, in step S322, the total number of temperature tests threshold is the sum of the thresholds for each initial test. For example, the preset test temperatures are -20℃, 50℃, and 70℃, and the corresponding thresholds for each initial test are 1000, 2000, and 2000, respectively. Therefore, the total number of temperature tests threshold is 5000.

[0155] When the total number of actuations of the air spring at each preset test temperature is greater than or equal to the temperature threshold, it indicates that the air spring has completed the durability test under the temperature operating parameters. When the total number of actuations of the air spring at each preset test temperature is less than the temperature threshold, it indicates that the air spring has not completed the durability test under the temperature operating parameters, and it is necessary to continue to make the air spring actuate at each preset test temperature.

[0156] In step S322, the threshold for the total number of hydraulic cycles is the sum of the thresholds for the second cycle. For example, if the preset thresholds for the second cycle of test hydraulic cycles of 5000N and 8000N are 1000 and 1500 respectively, then the threshold for the total number of hydraulic cycles is 2500.

[0157] When the total number of actuations of the air spring under each preset test hydraulic pressure is greater than or equal to the hydraulic total number of actuations threshold, it indicates that the air spring has completed the durability test under the hydraulic operating parameters. When the total number of actuations of the air spring under each preset test hydraulic pressure is less than the hydraulic total number of actuations threshold, it indicates that the air spring has not completed the durability test under the hydraulic operating parameters, and it is necessary to continue to make the air spring actuate under each preset test hydraulic pressure.

[0158] In step S322, the total number of pressure tests threshold is the sum of the thresholds for each third test. For example, the preset thresholds for the third test for test pressures of 0.6MPa, 0.9MPa, and 1.2MPa are 100, 200, and 200 respectively, so the total number of pressure tests threshold is 500.

[0159] When the total number of actuations of the air spring under each preset test air pressure is greater than or equal to the threshold for the total number of actuations under each pressure, it indicates that the air spring has completed the durability test under the air pressure parameters. When the total number of actuations of the air spring under each preset test air pressure is still less than the threshold for the total number of actuations under each pressure, it indicates that the air spring has not completed the durability test under the air pressure parameters, and it is necessary to continue to make the air spring actuate under each preset test air pressure.

[0160] In step S322, the total number of steering attempts threshold is the sum of the fourth number of attempts thresholds. For example, if the preset fourth number of attempts thresholds for test steering of 300 N·m and 500 N·m are 500 and 500 respectively, then the total number of steering attempts threshold is 1000.

[0161] When the total number of actuations of the air spring under each preset test steering direction is greater than or equal to the threshold for the total number of steering cycles, it indicates that the air spring has completed the durability test under the steering parameters. When the total number of actuations of the air spring under each preset test steering direction is still less than the threshold for the total number of steering cycles, it indicates that the air spring has not completed the durability test under the steering parameters, and it is necessary to continue to make the air spring actuate under each preset test steering direction.

[0162] Thus, in step S323, if the total number of temperature actions is not less than the temperature action threshold, the total number of hydraulic actions is not less than the hydraulic action threshold, the total number of air pressure actions is not less than the air pressure action threshold, and the total number of steering actions is not less than the steering action threshold, then the result of each action is determined to meet the preset requirements.

[0163] In other words, once the air spring has completed durability tests under temperature, hydraulic, pneumatic, and steering parameters, it indicates that the results of each action meet the preset requirements, the current durability test is complete, and the air spring's durability data can be measured.

[0164] By following steps S321-S323, if the total number of actual actuations of the air spring under each working condition parameter meets the target, the preset requirements are confirmed. This ensures that the durability test is completed and the durability data is tested only after the durability test for each working condition parameter meets the corresponding requirements when the target number of actuations for different working condition parameters is different, thereby improving the reliability of the durability test.

[0165] It is worth noting that if the durability test of some operating parameters of the air spring is completed, but the durability test of some operating parameters is not completed, then for each operating parameter that has completed the durability test, the operating parameter of the air spring is controlled to be switched to the corresponding preset test parameter value in turn according to the setting order of each preset test parameter value, that is, the corresponding operating condition is reapplied to the air spring.

[0166] For example, the threshold for the total number of temperature tests is 5000, the threshold for the total number of hydraulic tests is 2500, the threshold for the total number of air pressure tests is 500, and the threshold for the total number of steering tests is 1000. At the same time, the temperature, hydraulic pressure, air pressure, and steering torque of the air spring are adjusted according to each test sub-condition.

[0167] When the air spring has operated 500 times, the air pressure parameter will be the first to reach the total number of air pressure cycles threshold, meaning the air spring has completed the durability test operation under that air pressure parameter. At this point, the air spring has not yet completed the durability tests corresponding to temperature, hydraulic pressure, and steering, so the air spring operation still needs to be controlled. For the air pressure parameter, the internal gas pressure of the air spring is adjusted starting from the first preset test air pressure, and when the air spring reaches the third cycle threshold corresponding to the first preset test air pressure, it switches to the next preset test air pressure, and so on.

[0168] When the air spring has operated 1000 times, the steering parameters reach the corresponding total steering cycle threshold, and the air pressure parameters also reach the total air cycle threshold for the second time. However, the temperature and hydraulic parameters have not yet reached their corresponding total cycle thresholds, meaning the air spring has not yet completed the durability test under the temperature and hydraulic parameters. Continuing to control the air spring's operation, the air pressure parameters are again adjusted to regulate the internal gas pressure of the air spring, starting from the first preset test air pressure. Similarly, the steering parameters also adjust the steering torque on the air spring, starting from the first preset test steering.

[0169] Similarly, for each operating condition parameter, if the preset requirements are not met after each cycle (i.e., other operating conditions have not yet completed a cycle), the cycle continues, adjusting the operating conditions of the air spring sequentially starting from the first preset test parameter value. This continues until all operating conditions have completed at least one cycle, that is, until the actual total number of actions corresponding to each operating condition parameter reaches the corresponding total number threshold, that is, until the air spring completes the durability test operation corresponding to each operating condition parameter.

[0170] For example, until the air spring operates 5000 times, the total number of operations corresponding to the temperature condition parameter is equal to the temperature total number threshold, the total number of operations corresponding to the hydraulic condition parameter (5000 times) is greater than the hydraulic total number threshold, the total number of operations corresponding to the pneumatic condition parameter (5000 times) is greater than the pneumatic total number threshold, and the total number of operations corresponding to the steering condition parameter (5000 times) is greater than the steering total number threshold, thus meeting the preset requirements.

[0171] In some embodiments, temperature, hydraulic pressure, air pressure, and steering torque are controlled and regulated by outputting corresponding operating condition parameter control signals. Therefore, it can also be determined whether each operating condition parameter has completed at least one cycle based on the cycle status of the temperature control signal, hydraulic control signal, air pressure control signal, and steering control signal. When each operating condition parameter has completed at least one cycle and the actual number of actuations of the air spring has reached the corresponding threshold number, it indicates that the air spring has completed the durability test operation required by each operating condition parameter, thus confirming that it meets the preset requirements.

[0172] For example, taking temperature as an example, the temperature is composed of three preset test temperatures of -20℃, 50℃ and 70℃ in sequence to form a temperature test sub-condition. Each preset test temperature corresponds to a first-time threshold (e.g., -20℃ corresponds to 1000 times, 50℃ corresponds to 1000 times and 70℃ corresponds to 1000 times).

[0173] The temperature control signal will switch in the order of -20℃ to 50℃ to 70℃. When the temperature control signal completes a complete cycle of switching (completes the switching from -20℃ to 50℃ to 70℃), and the actual number of actions of the air spring at each preset test temperature reaches the corresponding first-time threshold, it indicates that the temperature condition parameters have completed one cycle, and it can be determined that the air spring has completed the durability test operation required by the temperature condition parameters.

[0174] In this way, temperature control signals, hydraulic control signals, pneumatic control signals, and steering control signals are collected respectively, and it is determined whether the control signals of each working condition parameter have completed at least one cycle based on the temperature control signals, hydraulic control signals, pneumatic control signals, and steering control signals.

[0175] If each operating condition parameter completes at least one cycle, it indicates that the air spring has completed the durability test operation required by each operating condition parameter and meets the preset requirements.

[0176] In other words, when the temperature control signal, hydraulic control signal, pneumatic control signal, and steering control signal have all completed at least one complete cycle, and the actual number of times the air spring operates under the corresponding working conditions is not less than the corresponding threshold number, it can be comprehensively determined that the air spring has completed the durability test operation required by each working condition parameter and meets the preset requirements.

[0177] Reference Figure 5 In some exemplary embodiments, the test method may further include the following steps S510-S520.

[0178] Step S510: Determine the working condition status identifier based on the judgment result of whether the result of each action meets the preset requirements.

[0179] Step S520: If the working condition status identifier is the preset completion identifier, determine that the durability test of the air spring under the current test working condition is completed.

[0180] Specifically, the working condition status identifier refers to the variable symbol used to identify the current execution status of the test working condition, and its value includes a preset completion flag and a preset incomplete flag.

[0181] The following explanation uses the example of a preset completion flag of 1 and a preset incomplete flag of 0.

[0182] In the initial state, the working condition status identifier is a preset incomplete flag, that is, the working condition status identifier is set to 0. If the action result does not meet the preset requirements, that is, if the durability test of at least one working condition parameter has not been completed, the value of the working condition status identifier will still remain as the preset incomplete flag, that is, it will still be 0.

[0183] When the action result is detected to meet the preset requirements, that is, when the durability test of each working condition parameter is completed, the value of the working condition status identifier is switched to the preset completion identifier, that is, the working condition status identifier is set to 1, indicating that the durability test operation of the air spring under the current test working condition is completed.

[0184] Thus, in step S130, the value of the operating condition status identifier can be directly used to determine whether the air spring has completed the current durability test. If the results of each action meet the preset requirements, and the value of the operating condition status identifier is determined to be a preset completion indicator, then the durability data of the air spring is tested, thereby tracking the test progress.

[0185] Therefore, the current durability test progress can be intuitively determined through this working condition status identifier, and the working condition status identifier can also be fed back to the staff terminal, so that the staff can directly understand the current test progress through the status identifier, so as to improve the convenience of the staff's work.

[0186] Furthermore, in other embodiments, the determination of the working condition status identifier in step S510 above, based on the judgment result of whether each action result meets the preset requirements, may also include: when each action result meets the preset requirements and the air spring returns to the preset initial state, assigning the working condition status identifier to a preset completion identifier.

[0187] That is, the condition for assigning the working condition identifier to the preset completion identifier is: the action result meets the preset requirements and the working condition of the air spring is restored to the preset initial state.

[0188] The preset initial state refers to the reference state of the air spring before testing, including initial air pressure, initial temperature, initial hydraulic pressure, initial steering torque, etc. This state is preset by technicians.

[0189] When the results of each action meet the preset requirements, the air spring completes the durability test operation required by each working condition parameter. When it is completed, the actual working condition of the air spring may be high temperature, high pressure, high load, high steering torque, etc. If it is maintained in this state, the initial working condition of the air spring will be different each time it is tested for durability, which will affect the next durability test and make it difficult to compare and study multiple sets of data.

[0190] Therefore, in this embodiment, after the action result meets the preset requirements, the working condition recovery process is first triggered to restore the working condition of the air spring to the preset initial state. For example, the load pressure (load) can be unloaded first to remove the steering torque; then the air pressure in the airbag is adjusted to the initial air pressure; and finally the ambient temperature is restored to the initial temperature.

[0191] It is worth noting that if the action result meets the preset requirements, but the working condition of the air spring has not yet returned to the preset initial state, the value of the working condition identifier will remain as the preset incomplete identifier, that is, it will still be 0.

[0192] The process continues until the air spring returns to its preset initial state. Then, the operating condition identifier is switched to the preset completion identifier, that is, the value of the operating condition identifier is switched to 1, and then the durability data measurement begins.

[0193] By forcibly restoring the air spring to its preset initial state, this ensures that each round of durability testing starts with a unified baseline state, avoiding deviations in the initial conditions of the next round of testing due to residual high temperature and high pressure conditions from the previous round of testing, thus making multiple sets of test data comparable.

[0194] In some exemplary embodiments, the testing method further includes switching the condition status identifier to a preset incomplete identifier after the durability data measurement is completed.

[0195] For example, when the value of the operating condition status identifier is switched to 1, the durability data measurement begins. During the measurement process, the value of the operating condition status identifier remains at 1 until the measurement is completed. Then, the value of the operating condition status identifier is switched to 0, indicating that the current durability test is completed and the next durability test begins.

[0196] In other words, the system automatically adjusts the parameters of each operating condition of the air spring according to the configuration of the next test condition for the next durability test, so as to automatically perform the next durability test on the air spring.

[0197] Therefore, by automatically switching the operating condition status identifier, the next durability test can be automatically connected, reducing the process interruption caused by manual switching of operating conditions, which helps to shorten the durability test cycle of air springs.

[0198] It is worth noting that, regarding the testing method of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still provided by... Figure 1-5 and combined Figure 6 As shown, it may include, for example:

[0199] The following example will be used to illustrate this.

[0200] The current test configuration includes temperature test sub-condition, hydraulic test sub-condition, air pressure test sub-condition, and steering test sub-condition.

[0201] The temperature test sub-conditions include: preset test temperatures of -20℃, 50℃, and 70℃, with corresponding first-time thresholds of 1000, 2000, and 2000, respectively. The corresponding temperature test threshold is the sum of the first-time thresholds, which is 5000.

[0202] The hydraulic test sub-conditions include: preset test hydraulic pressure of 5000N and 8000N, respectively, with corresponding second count thresholds of 1000 and 1500, and corresponding hydraulic count thresholds of 2500.

[0203] The air pressure test sub-conditions include: preset test air pressures of 0.6MPa, 0.9MPa, and 1.2MPa, with corresponding third number thresholds of 100, 200, and 200, respectively, and a corresponding temperature number threshold of 500.

[0204] The steering test sub-conditions include: preset test steering values ​​of 300 N·m and 500 N·m, with corresponding fourth number thresholds of 500 and 500, and a corresponding steering number threshold of 1000.

[0205] Specifically, before the current durability test begins, the air spring is in a preset initial state. When the current durability test begins, the operating condition status identifier is set to 0 (preset incomplete identifier). At this time, based on the first preset test temperature (-20℃), the first preset test hydraulic pressure (5000N), the first preset test air pressure (0.6MPa), and the first preset test steering (300N·m), corresponding temperature control signals, hydraulic control signals, air pressure control signals, and steering control signals are generated to control the temperature control system to adjust the air spring temperature to -20℃, control the hydraulic control system to adjust the load pressure on the air spring to 5000N, control the air pressure control system to adjust the gas pressure inside the air spring to 0.6MPa, and control the steering torque control system to adjust the steering torque on the air spring to 300N·m.

[0206] At the same time, the movement of the air spring is controlled, and the number of times the air spring moves is recorded.

[0207] After the air spring has operated 100 times, the first preset test air pressure reaches the corresponding threshold for the third test. At this point, the air pressure control signal is adjusted so that the air pressure parameter control system switches the internal gas pressure of the air spring from 0.6MPa to 0.9MPa, while other operating parameter control signals remain unchanged. The operating status identifier is still 0 at this time.

[0208] After the air spring operates 300 times, the second preset test air pressure reaches the corresponding threshold for the third test. At this point, the air pressure control signal is adjusted again, causing the air pressure parameter control system to switch the internal gas pressure of the air spring from 0.9 MPa to 1.2 MPa, while other operating parameters remain unchanged. At this time, the operating status identifier is still 0.

[0209] After the air spring operates 500 times, the air pressure control signal corresponding to the air pressure operating parameters completes one cycle adjustment. At this time, the air pressure control signal is adjusted so that the air spring gas pressure switches back to the first preset test air pressure, which is 0.6 MPa. Simultaneously, the actual number of air spring operations under the first preset test steering reaches the corresponding fourth threshold. Therefore, the steering control signal is adjusted so that the steering parameter control system switches the steering torque on the air spring to the second preset test steering, i.e., from 300 N·m to 500 N·m, while other operating parameters remain unchanged. At this time, the operating condition status identifier is still 0.

[0210] Similarly, after the air spring operates 5000 times, the temperature control signal completes one cycle, the hydraulic control signal completes two cycles, the pneumatic control signal completes ten cycles, and the steering control signal completes five cycles.

[0211] At this point, all operating condition parameter signals have completed at least one cycle, and the actual number of actuations of the air spring has also met the standard, confirming that the air spring has completed the durability test operations required by the test sub-conditions corresponding to all operating condition parameters. Afterwards, the control system for each operating condition parameter adjusts the air spring's operating condition to a preset initial state, and then the operating condition status identifier switches to 1.

[0212] After the operating condition status identifier is switched to 1, the durability data of the air spring is measured. Then, the configuration for the next durability test condition is determined (this configuration can be preset by the staff in advance, or entered by the staff during or after the measurement of the air spring's durability data; there are no restrictions here). After determining the configuration for the next durability test condition, the operating condition status identifier is switched to 0, and the next durability test begins.

[0213] In the next endurance test, the control signals for each operating condition parameter are adjusted according to the requirements of each test sub-condition, based on the control signals for each operating condition parameter and the number of times the air spring actuates. This adjustment continues until each operating condition parameter control signal completes at least one cycle. At this point, the air spring has completed the endurance test operation required for each operating condition parameter. The air spring is then returned to its preset initial state, and the operating condition status identifier is switched to 1. The endurance data of the air spring is then measured again, and this process is repeated.

[0214] In the preferred embodiment of the above testing method, the specific implementation of each step can still be found in the descriptions of the above exemplary embodiments, and the beneficial effects of each step in this preferred embodiment can also be found in the descriptions of the above exemplary embodiments.

[0215] The testing method in this embodiment adopts the above design. By controlling the movement of the air spring and automatically adjusting the parameters of each working condition of the air spring through each test sub-working condition in the current test working condition configuration, it automatically detects whether the movement result of the air spring meets the preset requirements. If the preset requirements are met, the durability data of the air spring is measured, and the next durability test is automatically performed iteratively. This can realize the automated durability test of the air spring without the need for manual pausing of the test to confirm whether the working condition parameter values ​​need to be changed. This can save the time of manual pausing of the test for confirmation, shorten the test cycle, improve test efficiency, and save manpower.

[0216] An embodiment of the second aspect of this application provides a testing apparatus suitable for durability testing of air springs, referring to... Figure 7 The test device may specifically include a processor 710 and a memory 720. The processor 710 and the memory 720 are connected, for example, via a bus. Optionally, the test device may also include a transceiver. It should be noted that in practical applications, the transceiver is not limited to one unit, and the structure of this test device does not constitute a limitation on the embodiments of this application.

[0217] The memory 720 is used to store application code that executes the solution of this application, and its execution is controlled by the processor 710. The processor 710 is used to execute the application code stored in the memory 720 to implement the content shown in the foregoing method embodiments.

[0218] The testing equipment in this embodiment can automatically perform durability tests on air springs by executing the testing methods in the above-described method embodiments, thereby improving the testing efficiency of air spring durability tests.

[0219] The above are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the protection scope of the claims of this application.

Claims

1. A test method suitable for durability testing of air springs, characterized in that, The testing method includes: Obtain the current test condition configuration, which includes at least two test sub-conditions corresponding to test condition parameters; According to each of the test sub-conditions, the parameters of each condition in which the air spring is located are adjusted, and the air spring is controlled to move, and the action results corresponding to each of the conditions are recorded. If the results of each action meet the preset requirements, measure the durability data of the air spring; After the durability data measurement is completed, the next test condition configuration of the air spring is obtained, and the air spring is subjected to the next durability test.

2. The test method according to claim 1, characterized in that, The operating parameters include temperature operating parameters, hydraulic operating parameters, air pressure operating parameters, and steering operating parameters. Adjusting the operating parameters of the air spring according to each of the test sub-operating conditions includes: Adjust the ambient temperature at the location of the air spring according to the test sub-condition corresponding to the temperature condition parameters. Adjust the load pressure borne by the air spring according to the test sub-condition corresponding to the hydraulic operating parameters; Adjust the air pressure inside the air spring according to the test sub-condition corresponding to the air pressure operating parameters; Adjust the steering torque on the air spring according to the test sub-condition corresponding to the steering parameters.

3. The test method according to claim 2, characterized in that, The test sub-conditions corresponding to the temperature operating condition parameters include multiple preset test temperatures, and a first number threshold corresponding to each preset test temperature; The step of adjusting the ambient temperature at the location of the air spring according to the test sub-condition corresponding to the temperature condition parameters includes: According to the preset test temperature setting order, the ambient temperature at the location of the air spring is controlled to be switched sequentially to the preset test temperature according to the preset switching strategy.

4. The test method according to claim 3, characterized in that: The preset switching strategy includes: If the current preset test temperature is detected to meet the preset switching conditions, the ambient temperature at the location of the air spring is controlled to switch to the next preset test temperature; The preset switching conditions include: The number of times the air spring operates at the current preset test temperature reaches the first threshold number corresponding to the current preset test temperature.

5. The test method according to claim 3, characterized in that: The test sub-conditions corresponding to the hydraulic operating parameters include multiple preset test hydraulic pressures, and a second threshold number corresponding to each preset test hydraulic pressure. The test sub-conditions corresponding to the air pressure condition parameters include multiple preset test air pressures, and a third threshold number corresponding to each preset test air pressure; The test sub-conditions corresponding to the steering condition parameters include multiple preset test steerings, and a fourth number threshold corresponding to each preset test steering. Specifically, determining whether each action result meets the preset requirements based on the recorded action results corresponding to each of the aforementioned working condition parameters includes: Based on the action results corresponding to each of the aforementioned working condition parameters, the actual number of actions of the air spring under each of the aforementioned preset test temperatures, preset test hydraulic pressures, preset test air pressures, and preset test directions is determined. Based on the actual number of times the air spring is activated, and the corresponding first number threshold, second number threshold, third number threshold, and fourth number threshold, it is determined whether each action result meets the preset requirements.

6. The test method according to claim 5, characterized in that, Determining whether the results of each action meet the preset requirements includes: Based on the actual number of times the air spring operates, the total number of temperature-related operations, the total number of hydraulic operations, the total number of air pressure operations, and the total number of steering operations under each preset test temperature, preset test hydraulic pressure, preset test air pressure, and preset test steering direction are determined respectively. Based on each of the first number threshold, each of the second number threshold, each of the third number threshold, and each of the fourth number threshold, the total number of temperature count threshold, the total number of hydraulic count threshold, the total number of air pressure count threshold, and the total number of steering count threshold are determined respectively. Based on the total number of temperature actions, the total number of hydraulic actions, the total number of pneumatic actions, the total number of steering actions, the total number of temperature actions, the total number of hydraulic actions, the total number of pneumatic actions, and the total number of steering actions, determine whether each action result meets the preset requirements.

7. The test method according to claim 1, characterized in that, The method also includes: Based on the judgment result of whether the result of each action meets the preset requirements, the working condition status identifier is determined; If the operating condition status identifier is a preset completion identifier, the durability test of the air spring under the current test condition is determined to be completed.

8. The test method according to claim 7, characterized in that, The step of determining the working condition status identifier based on the judgment result of whether each of the action results meets the preset requirements includes: If the results of each action meet the preset requirements and the air spring returns to the preset initial state, the working condition identifier is assigned a preset completion identifier.

9. The test method according to claim 7, characterized in that, The testing method also includes: After completing the durability data measurement, the operating condition status identifier is switched to the preset incomplete identifier.

10. A testing device suitable for performing durability tests on air springs, characterized in that, The testing equipment includes: processor; Memory, used to store computer programs; When the computer program is executed by the processor, the processor causes the processor to implement the test method as described in any one of claims 1-9.

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