Testing device and testing method for wiper assembly
By designing a wiper assembly test device that integrates a water circulation unit and a test stand, synchronous loading of vibration and operation is achieved. By adopting the actual road surface vibration acceleration load spectrum and multi-parameter collaborative control, the shortcomings of existing wiper durability performance verification are solved, and the test efficiency and comprehensiveness of evaluation are improved.
Patent Information
- Application Number
- CN202511554979.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-01-13
AI Technical Summary
In the existing technology, the durability performance verification scheme of car wipers cannot effectively simulate the combined load conditions of vibration and wiping occurring simultaneously in a real vehicle, resulting in insufficient fault exposure, limited evaluation dimensions, excessively long equipment operating hours, and incomplete simulation of environmental parameters.
Design a test device for a windshield wiper assembly, integrating a water circulation unit, test seat, test vehicle head, and control unit to achieve synchronous loading of vibration and operation. Employ the actual road vibration acceleration load spectrum and multi-parameter collaborative control to simulate complex working conditions. The device includes a spray module and a recycling module, with a detection component for data collection.
It enables composite testing that more closely resembles actual operating conditions, improving testing efficiency and evaluation dimensions. It allows for a more comprehensive assessment of the durability and reliability of wipers, shortens testing time, and enhances the stability and consistency of testing.
Smart Images
Figure CN121323948A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive component performance testing technology, and in particular to a testing device and method for a windshield wiper assembly. Background Technology
[0002] Car wipers are a core component for ensuring driving safety in inclement weather, and their durability must withstand the dual effects of road vibration loads and wiping motion loads.
[0003] Existing technologies for verifying the durability of automotive windshield wipers have the following drawbacks: Firstly, the test conditions are separated, failing to reflect real-world vehicle usage scenarios. Traditional methods execute vibration durability and operational durability separately. Vibration durability involves applying vibration loads on a vibration table, while operational durability involves conducting wiper operation cycles on a fixed platform (e.g., wiping cycles at constant temperature). This fails to simulate the real-world scenario where vibration and wiping occur simultaneously in a vehicle, potentially leading to insufficient fault exposure under combined load conditions, such as intermittent functional failures, loose connecting bolts, or uneven wiper blade wear. Secondly, the environmental parameters are limited, resulting in incomplete simulation. Most existing tests only control temperature and spray environment factors, without considering environmental parameters. The combined effects of vibration, alternating temperature, water spray / dry wiping, and intermittent wiping in real-world vehicle usage scenarios may lead to discrepancies between durability test results and actual user experience. Furthermore, the testing equipment suffers from fragmented functionality and long operating hours: vibration testing equipment only has excitation capabilities, and the wiping device can only perform fixed-parameter wiping. Testing these two types of equipment separately doubles the required operating hours. Finally, the evaluation criteria are limited: using only the number of wiping cycles as operational durability and structural fracture as vibration durability as the failure standard fails to consider implicit performance aspects that consumers may care about, such as motor current fluctuations under the combined effects of vibration and operation, and wiping cleanliness under vibration conditions. This makes a comprehensive assessment of durability and reliability impossible.
[0004] Therefore, there is an urgent need for a testing device and method for windshield wiper assemblies to solve the problem that the existing technologies cannot meet the requirements of windshield wiper real-vehicle operating condition reproduction, efficient testing and accurate evaluation. Summary of the Invention
[0005] Based on the above, the purpose of this invention is to provide a test device and test method for a wiper assembly, which can realize a composite test of the vibration and operation of the wiper assembly under test, with synchronous loading and multi-parameter coordinated control, which is more similar to the actual operation, involves more parameters, has more evaluation dimensions, and has higher test efficiency.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] The test apparatus for the wiper assembly includes:
[0008] The water circulation unit includes an environmental chamber, and a spray module and a recycling module disposed within the environmental chamber;
[0009] A test stand is set inside the environmental chamber, and an actuator is installed on the test stand to simulate loads with preset vibration parameters.
[0010] The test vehicle front is detachably mounted on the actuator, and the test vehicle front is equipped with a windshield; the wiper assembly to be tested is detachably mounted on the windshield; the spray module is used to spray simulated rainwater onto the windshield with preset spray parameters, and the recycling module collects the simulated rainwater and supplies it to the spray module.
[0011] The control unit is communicatively connected to the spray module, the recycling module, the actuator, and the wiper assembly under test. The control unit also includes a detection component for detecting test data.
[0012] As a preferred embodiment of the test device for the wiper assembly, the preset vibration parameters of the load are obtained by editing the actual road vibration acceleration load spectrum and the time-domain road load spectrum, deleting load spectra with less damage, shortening the vibration duration, and using load spectrum iteration software to iteratively generate load spectrum files.
[0013] As a preferred embodiment of the test device for the wiper assembly, the preset spray parameters include spray duration and spray pressure; and / or, the test data includes the motor current of the wiper assembly under test, the windshield clearing rate, and the wiper arm position information of the wiper assembly under test.
[0014] As a preferred embodiment of the test device for the wiper assembly, the recycling module includes a water tank, and the lower end of the wiper arm of the wiper assembly to be tested is disposed in the water tank; the windshield is tilted, and the distance between the rear end of the test vehicle head and the rear end of the windshield is not less than 100mm, and the distance between the front end of the test vehicle head and the front end of the water tank is not less than 100mm.
[0015] As a preferred embodiment of the test device for the wiper assembly, the actuator is provided in two parts. The test device for the wiper assembly also includes a connecting bracket, which is connected to both actuators. The test vehicle head is disposed on the connecting bracket. The test device for the wiper assembly also includes a waterproof cloth, which covers the actuator.
[0016] The test method for the wiper assembly employs the test apparatus for the wiper assembly as described in any of the above embodiments, and the test method includes:
[0017] The wiper assembly to be tested is installed in the test device for the wiper assembly;
[0018] The wiper assembly to be tested is started, and the control unit is started at the same time. The actuator operates with preset vibration parameters, and the spray module operates with preset spray parameters.
[0019] As a preferred method for testing wiper assemblies, the test method includes simulation tests of four operating conditions: a first normal operating condition, a second normal operating condition, a complex operating condition, and an extreme operating condition, with each of the four operating conditions running sequentially for a certain period of time until the total running time is reached.
[0020] As a preferred embodiment of the testing method for the wiper assembly, the detection component acquires the test data sequentially at preset time intervals; if any of the test data does not meet the preset requirements, it is deemed unqualified; when all the test data meet the preset requirements after running the total running time, it is deemed qualified.
[0021] As a preferred method for testing wiper assemblies, the preset requirements include: the motor current fluctuation of the wiper assembly under test exceeds the initial value by 30% or stall occurs; the wiper efficiency of the windshield decreases by more than 20%; and the linkage mechanism of the wiper assembly under test is stuck or deformed.
[0022] As a preferred method for testing wiper assemblies, after determining that the test is unqualified, the following methods are also included: output current fluctuation curve, wiping performance attenuation curve; and the test time and test data that do not meet the preset requirements are recorded.
[0023] The beneficial effects of this invention are as follows:
[0024] This invention utilizes an environmental chamber that integrates a spray module, a recycling module, a test bench, a test vehicle head, and the wiper assembly under test. This allows for testing within a relatively enclosed environment, reducing external influences and preventing liquid splashing. The environmental chamber houses a test vehicle head with a windshield to simulate the actual working environment of the wiper assembly under test. The test vehicle head is also positioned as an actuator to simulate vibration loads with preset vibration parameters that the wiper assembly may encounter during operation. The spray module sprays simulated rainwater onto the wiper assembly to simulate rainfall, while the recycling module collects the simulated rainwater. Furthermore, a control unit with detection components, communicatively connected to all the aforementioned units and modules, controls the entire testing process and collects the test results. In summary, the aforementioned test device for the wiper assembly can achieve a composite test of synchronous loading and multi-parameter coordinated control of vibration and operation of the wiper assembly under test during the operational test. This is more similar to the actual operating conditions, involves more parameters, has more evaluation dimensions, and has higher test efficiency. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the test device for the wiper assembly provided in a specific embodiment of the present invention;
[0027] Figure 2 This is a schematic diagram of the operation mode of the spray module of the test device for the wiper assembly provided in a specific embodiment of the present invention;
[0028] Figure 3 This is a schematic diagram of another operating mode of the spray module of the test device for the wiper assembly provided in a specific embodiment of the present invention.
[0029] In the picture:
[0030] 1. Wiper assembly to be tested;
[0031] 100. Test stand; 110. Actuator;
[0032] 200. Test vehicle front; 210. Windshield;
[0033] 300. Sink;
[0034] 400. Connecting card slot;
[0035] 500. Waterproof fabric. Detailed Implementation
[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.
[0038] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0041] like Figure 1As shown, this embodiment provides a test apparatus for a wiper assembly. The test apparatus includes a water circulation unit, a test stand 100, a test vehicle head 200, and a control unit. The water circulation unit includes an environmental chamber, and a spray module and a recycling module disposed within the environmental chamber. The test stand 100 is disposed within the environmental chamber and has an actuator 110 mounted on it. The actuator 110 is used to simulate loads with preset vibration parameters. The test vehicle head 200 is detachably mounted on the actuator 110 and has a windshield 210. The wiper assembly 1 to be tested is detachably mounted on the windshield 210. The spray module sprays simulated rainwater onto the windshield 210 with preset spray parameters, and the recycling module collects the simulated rainwater and supplies it to the spray module. The control unit is communicatively connected to the spray module, the recycling module, the actuator 110, and the wiper assembly 1 to be tested. The control unit also includes a detection component for detecting test data.
[0042] By setting up an environmental chamber to integrate a spray module, a recycling module, a test bench 100, a test vehicle head 200, and the wiper assembly 1 under test, the test can be conducted in a relatively enclosed environment, reducing external influencing factors and avoiding liquid splashing. The environmental chamber houses the test vehicle head 200 with a windshield 210 to create the actual working environment for the wiper assembly 1 under test. The test vehicle head 200 is positioned on the actuator 110 to simulate vibration loads with preset vibration parameters that the wiper assembly 1 under test may encounter during operation. The spray module sprays simulated rainwater onto the wiper assembly 1 to simulate rainfall, and the recycling module collects the simulated rainwater. Furthermore, a control unit with detection components, communicatively connected to all the aforementioned units and modules, is used to control the entire test process and collect the test results. In summary, the above-mentioned test device for the wiper assembly can achieve a composite test of synchronous loading and multi-parameter coordinated control of vibration and operation of the wiper assembly 1 under test during the operation test. It is more similar to the actual operation, involves more parameters, has more evaluation dimensions, and has higher test efficiency.
[0043] It is worth noting that the aforementioned wiper assembly testing device is suitable for reliability and durability verification and evaluation of wiper assemblies in various passenger cars and commercial vehicles, especially for durability performance testing under complex operating conditions in real vehicles. A composite testing device that synchronously loads vibration and wiper operation is provided, featuring a high degree of integration. It integrates vibration excitation, environmental simulation, wiper control, and data acquisition, shortening equipment operating hours. The integrated design of the vibration excitation and environmental simulation modules solves the problem of functional separation in traditional equipment, improving test stability and result consistency. By replacing the front half of the vehicle body, the wiper assembly to be tested, and different road vibration signals, it can be adapted to wipers of various vehicle models without the need for customized dedicated equipment, thus improving equipment versatility.
[0044] Specifically, in existing technologies, most sinusoidal vibrations using a fixed vibration mode differ significantly from the loads encountered by the wiper assembly 1 during actual operation, leading to inaccurate test results. Therefore, in this embodiment, the preset vibration parameters of the load are obtained by editing the actual road vibration acceleration load spectrum and the time-domain road load spectrum, removing load spectra with less damage, shortening the vibration duration, and using load spectrum iteration software to iteratively generate the load spectrum file. For example, the aforementioned iteration software can be MTS software-cRPCpro. The vibration load spectrum is acquired as follows: an acceleration sensor is placed at the front end of the front seat guide rail mounting face to acquire the vibration acceleration time-domain signals of urban roads and typical road surfaces. Typical road surfaces include cobblestone roads, washboard roads, Belgian roads, twisted roads, uneven cement roads, potholes, speed bumps, etc. The vehicle speeds for different road surfaces are as follows: urban paved roads 50km / h; potholes 40km / h; cobblestone roads 40km / h; twisted roads 5km / h-10km / h; washboard roads 20km / h; uneven cement roads 10km / h; Belgian roads 20km / h; speed bumps 15km / h; and railway tracks 30km / h.
[0045] Furthermore, the preset spray parameters include spray duration and spray pressure, simulating rainfall from multiple aspects to make the test closer to reality and thus improve the accuracy of the test results. Simultaneously, the water circulation unit is equipped with a water storage tank to store and supply simulated rainwater to the spray module, ensuring water supply circulation. In addition, the test data includes the motor current of the wiper assembly 1 under test, the clearing rate of the windshield 210, and the wiper arm position information of the wiper assembly 1 under test. The durability of the wiper assembly 1 under test is evaluated from multiple aspects, resulting in a more comprehensive evaluation system.
[0046] In this embodiment, the recycling module includes a water tank 300, and the lower end of the wiper arm of the wiper assembly 1 under test is disposed within the water tank 300. The water tank 300 is used to circulate and simulate rainwater flow during the operation of the wiper assembly 1 under test, creating an actual working environment for the wiper assembly 1. Simultaneously, the windshield 210 is tilted to further simulate the actual working environment of the wiper assembly 1. Furthermore, the distance between the rear end of the test vehicle front 200 and the rear end of the windshield 210 is not less than 100mm, and the distance between the front end of the test vehicle front 200 and the front end of the water tank 300 is not less than 100mm, to ensure that the posture of the test vehicle front 200 is consistent with the horizontal state of the actual vehicle. Further, a steel frame is welded to the lower part of the vehicle body. The bottom surface of the frame is flat, facilitating installation with the actuator 110. The steel frame is rectangular, with a five-sided frame, and its top surface is welded to the test vehicle front 200. To ensure that welding stress does not alter the structural dimensions of the test vehicle front 200, the welding positions are located on the longitudinal beams and sill beams of the test vehicle front 200, fully guaranteeing that the installation state of the wiper assembly 1 to be tested remains consistent with the test conditions.
[0047] Preferably, two actuators 110 are provided. The test device for the wiper assembly also includes a connecting bracket 400, which is connected to both actuators 110. The test vehicle head 200 is disposed on the connecting bracket 400. The two actuators 110 increase the range of simulated loads. The connecting bracket 400 is used to install the wiper to be tested. Specifically, the wiper to be tested and the water tank 300 are installed using original factory bolts as much as possible, and the torque is set to the lower limit of the technical requirements. Preferably, the test device for the wiper assembly also includes a waterproof cloth 500, which covers the actuator 110. This prevents water from entering the actuator 110 during the test and ensures the safety of the test.
[0048] This implementation method also discloses a test method for a wiper assembly, employing the test apparatus for a wiper assembly as described in any of the above schemes. The test method includes: installing the wiper assembly 1 to be tested onto the test apparatus for the wiper assembly; starting the operation of the wiper assembly 1 to be tested, simultaneously operating the control unit, with the actuator 110 operating at preset vibration parameters and the spray module operating at preset spray parameters. The above-mentioned test method for the wiper assembly can replicate the multi-stress, multi-parameter coupled scenario of real vehicle road vibration, wiper movement, and environmental interference, solving the problems of traditional test methods such as separation of test conditions, disconnection from real vehicle usage scenarios, insufficient environmental parameters, and incomplete simulation; at the same time, it establishes a multi-dimensional evaluation system to accurately identify hidden faults under complex working conditions and improve test reliability.
[0049] Specifically, the test device for installing the wiper assembly 1 to be tested includes: S1. Preparation of the test vehicle head 200: After installing the windshield and water channel 300, the test vehicle head 200 is cut, ensuring that the boundary conditions for the operation of the wiper assembly 1 to be tested are preserved. S2. Installation of the wiper assembly 1 to be tested: The wiper assembly 1 to be tested and the water channel 300 cover plate are fixed to the vehicle body with original bolts, with the torque set to the lower limit of the technical requirements. A sample of the wiper assembly 1 to be tested, whose blade contact pressure and angle of attack meet the product technical requirements, is selected. S3. Preparation of the actuator 110: The actual road vibration acceleration load spectrum is collected from the entire vehicle. The time-domain road load spectrum is edited, and load spectra with less damage are removed to shorten the vibration duration. Based on typical road surfaces, load spectrum iteration software is used to iteratively generate load spectrum files that the excitation equipment can call, and all road load spectrum files are linked and edited as the excitation load. The installed test vehicle head 200 was pre-vibrated for 10 minutes according to the excitation load spectrum to verify the stability of the excitation table response. S4, Water circulation unit preparation. The water circulation unit was run, and the circulating water spraying and interval conditions were executed according to the preset circulation conditions to verify the stability of the spraying module and the recycling module. Any water leakage was checked and adjusted in time.
[0050] In this embodiment, the testing method includes simulation tests of four operating conditions: a first normal operating condition, a second normal operating condition, a complex operating condition, and an extreme operating condition. Each of the four operating conditions is run sequentially for a specified duration until the total running time is reached. The four operating conditions have different test parameters, and the tests are conducted sequentially and repeatedly, making the test structure more reliable. Correspondingly, the spray module can have... Figure 2 As shown and Figure 3 The operating mode shown, or other combinations of spraying and stopping times, can be set by those skilled in the art according to actual needs, and no specific limitations are made here.
[0051] For example, the above-mentioned cyclic combination test process can be set up as follows: one cycle contains the following 4 stages, one cycle lasts 24 hours, and a total of 30 cycles are executed, with the specific steps as follows:
[0052] Phase 1: First normal working condition (8 hours); Vibration excitation: continuous loading of urban paved road vibration signal; Operation of wiper assembly 1 to be tested: low speed mode, switching to intermittent mode every 30 minutes, with an interval of 30 seconds; Rainwater parameters: spray flow rate 5L / h, ambient temperature for 7 hours + 40℃ water temperature for 1 hour; Data acquisition: record wiper operating parameters once every 1 hour.
[0053] Phase 2: Second normal operating condition (8 hours); Vibration excitation: continuous loading of urban normal road vibration signal; Operation of wiper assembly 1 to be tested: high speed mode; Rainwater parameters: spray flow rate 12L / h, normal temperature 7h + 40℃ water temperature 1h; Data acquisition: record wiper operating parameters once every 1 hour.
[0054] Phase 3: Complex operating conditions (5 hours); Vibration excitation: 4 hours of vibration signal on urban paved roads → 1 hour on typical roads (including 10 minutes each of fish scale potholes, cobblestone roads, twisted roads, washboard roads, uneven cement roads, and Belgian roads); Operation of wiper assembly 1 to be tested: Alternate between high-speed mode and intermittent mode (interval time 10s), switching once every 1 hour; Rainwater parameters: Spray flow rate 2L / h → 12L / h, switching once every 1 hour; Data acquisition: Record wiper operating parameters once every 1 hour.
[0055] Phase 4: Extreme working conditions (3 hours); Vibration excitation: Continuous loading of typical road vibration signals, one cycle per hour, including 10 minutes each of fish scale potholes, cobblestone roads, twisted roads, washboard roads, uneven cement roads, and Belgian roads, plus one time each of speed bumps and railway tracks, for a total of 3 cycles; Operation of wiper assembly 1 to be tested: Alternating between low-speed mode and intermittent mode (interval interval 10s), switching once every 0.5 hours; Rainwater parameters: Spray flow rate 8L / h, room temperature; Data acquisition: Wiper operating parameters recorded once every 30 minutes.
[0056] In this embodiment, the detection component acquires test data sequentially at preset time intervals; as described above in the cyclic combination test process, the interval time for different working conditions can be set differently, and the interval time can be reduced for extreme working conditions.
[0057] Furthermore, if any test data fails to meet the preset requirements, it is deemed unqualified; if all test data meet the preset requirements after the total running time, it is deemed qualified.
[0058] Specifically, the preset requirements include: the motor current fluctuation of the wiper assembly 1 under test exceeds the initial value by more than 30% or stalling occurs; the wiping efficiency of the windshield 210 decreases by more than 20%; and the linkage mechanism of the wiper assembly 1 under test is stuck or deformed. Multiple judgment parameters are provided to enrich the evaluation system.
[0059] Preferably, the preset requirements may further include one, two, multiple or all of the following: being dimensionally stable and having no plastic deformation (except for collision tests) under the vehicle's overall temperature environment and body torsion conditions; having no defects such as sink marks, ripples, cracks, or breakages on the part surface; not making any noise (such as squeaking, creaking, whistling, popping, buzzing, etc.) during stationary or wiping operations; not contacting adjacent components (such as the A-pillar and the cover plate of the water trough 300); having a reliable connection and cooperation with the vehicle body without generating any popping or creaking sounds; the components or fasteners not loosening (not dropping below the limit value); the fasteners, supports, and breathable membranes not being damaged; having no flocculation or material embrittlement; the motor cover having no shrinkage and no leakage; having no cracks; having no corrosion; functioning normally, and the wiper arm pressure and wiper arm torsion angle must be within the tolerance range specified on the drawing; after the test, the wiper assembly must work completely normally, and the wiper arm pressure and wiper arm torsion angle must be within the tolerance range specified on the drawing, and obvious commutation noise or wiper noise (such as squeaking, flutter, jitter, etc.) is prohibited.
[0060] Optionally, after determining non-conformance, it further includes: outputting the output current fluctuation curve and the wiping cleanliness attenuation curve; and recording the test time and the test data that do not meet the preset requirements.
[0061] Preferably, after determining conformance, it further includes outputting the above curves to facilitate recording the test process for subsequent research by the test personnel.
[0062] In summary, for the test device and test method of the above wiper assembly, during the operation of the to-be-tested wiper assembly 1, an excitation load based on the real vehicle road surface vibration signal is synchronously applied to reproduce the composite condition of synchronous vibration-wiping load. The actuator 110, the environmental chamber, and the test vehicle head 200 are integrally designed to ensure the realization of the test method of synchronous loading of vibration and wiper operation, and solve the problem of functional segmentation of traditional equipment. A cyclic progressive test process is adopted, with a single cycle period of 24 hours and a total of 30 cycles executed. In a single test cycle, the vibration type, wiper mode, temperature, and spray flow rate are dynamically switched to achieve multi-parameter coupling. The to-be-tested wiper assembly 1 is installed and fixed by using a test vehicle head 200 that is closer to the real vehicle body. The test vehicle head 200 maintains a multi-sided frame structure to ensure that the installation posture, load transfer path, and real vehicle are consistent. The road spectrum collection of typical urban roads and test field roads is defined to obtain the real vehicle vibration signals of different roads and achieve targeted excitation. Combining the multi-parameter determination system of the motor current, wiping cleanliness, noise, wear amount, and link state of the to-be-tested wiper assembly 1, the judgment is more comprehensive.
[0063] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.
Claims
1. A test apparatus for a wiper assembly, characterized in that, include: The water circulation unit includes an environmental chamber, and a spray module and a recycling module disposed within the environmental chamber; A test stand (100) is installed inside the environmental chamber. An actuator (110) is installed on the test stand (100). The actuator (110) is used to simulate the load of preset vibration parameters. The test vehicle front (200) is detachably mounted on the actuator (110), and the test vehicle front (200) is provided with a windshield (210); the wiper assembly (1) to be tested is detachably mounted on the windshield (210); the spray module is used to spray simulated rainwater onto the windshield (210) with preset spray parameters, and the recycling module collects the simulated rainwater and supplies it to the spray module; The control unit is communicatively connected to the spray module, the recycling module, the actuator (110), and the wiper assembly (1) to be tested. The control unit also includes a detection component for detecting test data.
2. The test apparatus for the wiper assembly according to claim 1, characterized in that, The preset vibration parameters of the load are obtained by editing the actual road vibration acceleration load spectrum and the time-domain road load spectrum, removing load spectra with less damage, shortening the vibration duration, and using load spectrum iteration software to iteratively generate load spectrum files.
3. The test apparatus for the wiper assembly according to claim 1, characterized in that, The preset spray parameters include spray duration and spray pressure; and / or, the test data includes the motor current of the wiper assembly (1) under test, the wiping efficiency of the windshield (210), and the wiper arm position information of the wiper assembly (1) under test.
4. The test apparatus for the wiper assembly according to claim 1, characterized in that, The recycling module includes a water tank (300), and the lower end of the wiper arm of the wiper assembly (1) to be tested is disposed in the water tank (300); the windshield (210) is inclined, and the distance between the rear end of the test vehicle head (200) and the rear end of the windshield (210) is not less than 100mm, and the distance between the front end of the test vehicle head (200) and the front end of the water tank (300) is not less than 100mm.
5. The test apparatus for the wiper assembly according to claim 1, characterized in that, Two actuators (110) are provided. The test device for the wiper assembly also includes a connecting bracket (400), which is connected to both actuators (110). The test vehicle head (200) is disposed on the connecting bracket (400). The test device for the wiper assembly also includes a waterproof cloth (500), which covers the actuators (110).
6. A test method for a wiper assembly, characterized in that, The test apparatus for the wiper assembly as described in any one of claims 1-5, wherein the test method comprises: The wiper assembly to be tested (1) is installed in the test device of the wiper assembly; The wiper assembly (1) to be tested is started to run, and the control unit is run at the same time. The actuator (110) runs with preset vibration parameters, and the spray module runs with preset spray parameters.
7. The test method for the wiper assembly according to claim 6, characterized in that, The test method includes simulation tests of four operating conditions: a first normal operating condition, a second normal operating condition, a complex operating condition, and an extreme operating condition. The four operating conditions are run sequentially for one running time until the total running time is reached.
8. The test method for the wiper assembly according to claim 7, characterized in that, The detection component acquires the test data sequentially at preset time intervals; if any of the test data does not meet the preset requirements, it is determined to be unqualified; when all the test data meet the preset requirements after running the total running time, it is determined to be qualified.
9. The test method for the wiper assembly according to claim 8, characterized in that, The preset requirements include: the motor current fluctuation of the wiper assembly (1) under test exceeds the initial value by 30% or the motor stalls; the wiping efficiency of the windshield (210) decreases by more than 20%; and the linkage mechanism of the wiper assembly (1) under test is stuck or deformed.
10. The test method for the wiper assembly according to claim 8, characterized in that, After determining that the test is unqualified, the following are also included: output current fluctuation curve, scraping cleanliness decay curve; and the test time and test data that do not meet the preset requirements are recorded.