Testing device and method for electronic brake caliper

Abstract

The invention provides a testing device and method for an electronic brake caliper, and relates to the technical field of vehicles. In the device, a main control unit controls a first processing unit to drive a pedal unit to output a pedal displacement signal to a second processing unit according to a corresponding request value according to a preset test requirement, and the second processing unit drives a to-be-tested electronic brake caliper to clamp based on the pedal displacement signal; the first data acquisition unit acquires actual clamping force data of the to-be-tested electronic brake caliper and feeds back the actual clamping force data to the first processing unit; the first processing unit obtains working parameters of the to-be-tested electronic brake caliper in the clamping process; the first processing unit determines whether the clamping and releasing functions of the to-be-tested electronic brake caliper are normal or not according to the actual clamping force data, and determines whether the working state of the to-be-tested electronic brake caliper is normal or not according to the working parameters, thereby achieving the comprehensive testing of the electronic brake caliper.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a testing device and method for an electronic brake caliper. Background Technology

[0002] With the development of vehicle electrification and intelligentization, the popularity of electric vehicles is increasing day by day. Electromechanical braking technology is an important research direction, providing a foundation for meeting higher levels of driver assistance functions.

[0003] Electronic brake calipers are the core of electromechanical braking technology. As a new type of braking device, their structure differs from hydraulic brake calipers. Electronic brake calipers transmit electrical energy through a motor and reduction gear to output braking force to the wheel end, achieving fully decoupled brake-by-wire braking. As a novel braking device, the internal control logic is relatively complex, making traditional testing equipment unsuitable for functional testing of electronic brake calipers. Summary of the Invention

[0004] This application provides a testing device and method for electronic brake calipers to test the functionality of electronic brake calipers.

[0005] In a first aspect, embodiments of this application provide a testing device for an electronic brake caliper, comprising: a main control unit, a first processing unit, a pedal unit, a second processing unit, and a first data acquisition unit.

[0006] According to the preset test requirements, the main control unit controls the first processing unit to drive the pedal unit to output a pedal displacement signal to the second processing unit with the corresponding request value. The second processing unit drives the electronic brake caliper under test to clamp based on the pedal displacement signal. The first data acquisition unit collects the actual clamping force data of the electronic brake caliper under test and feeds the actual clamping force data back to the first processing unit. The first processing unit obtains the working parameters of the electronic brake caliper under test during the clamping process. Based on the actual clamping force data, the first processing unit determines whether the clamping and releasing functions of the electronic brake caliper under test are normal, and determines whether the working status of the electronic brake caliper under test is normal based on the working parameters.

[0007] Based on the above technical content, this application embodiment simulates the driving process of the electronic brake caliper by outputting the pedal displacement signal of the driving pedal unit, making the test environment closer to the actual working conditions; the first data acquisition unit monitors the actual clamping force output by the electronic brake caliper and feeds it back to the first processing unit, thus constructing a complete closed-loop test system and realizing real-time feedback and process monitoring; the first processing unit can test the clamping and releasing functions of the electronic brake caliper, as well as test and analyze the working status of the electronic brake caliper, thus realizing comprehensive testing of the electronic brake caliper.

[0008] In one possible implementation, the pedal unit includes a servo electric cylinder, a slide rail guide rod, and an electronic pedal; the first processing unit uses the input force or input displacement corresponding to the preset test requirements as the request value, drives the servo electric cylinder to push the electronic pedal through the slide rail guide rod, and the electronic pedal outputs a pedal displacement signal to the second processing unit.

[0009] In this embodiment of the application, a method for generating pedal displacement signals is provided. By using a servo electric cylinder, a slide rail guide rod, and an electronic pedal, the real vehicle braking environment is simulated, making the test results more realistic.

[0010] In one possible implementation, the first processing unit determines whether the clamping and release functions of the electronic brake caliper under test are normal based on the actual clamping force data, including: the first processing unit obtains the first time when the electronic brake caliper under test rises from the preset clamping force to the clamping force corresponding to the input force or input displacement, and the second time when the electronic brake caliper under test falls from the clamping force corresponding to the input force or input displacement to the preset clamping force; and determines whether the clamping and release functions of the electronic brake caliper under test are normal based on the first time and the second time.

[0011] Here, a more refined method is provided to determine whether the clamping and release functions of the electronic brake caliper are normal, namely, to determine whether the clamping and release functions of the electronic brake caliper meet the braking requirements by measuring the clamping time and release time.

[0012] In one possible implementation, the device further includes a second data acquisition unit and a third data acquisition unit; the second data acquisition unit acquires the thrust applied to the electronic pedal by the servo electric cylinder and feeds the thrust back to the first processing unit; the third data acquisition unit acquires the displacement applied to the electronic pedal by the servo electric cylinder and feeds the displacement back to the first processing unit.

[0013] Among these, achieving closed-loop control of the servo electric cylinder through information feedback is beneficial for improving testing accuracy and reliability.

[0014] In one possible implementation, the operating parameters are the operating parameters of the electronic brake caliper under test when it moves, which are read by the first processing unit through a preset file; the operating parameters include the actual position of the internal motor, the motor angle, the motor quadrature-axis current and the motor direct-axis current.

[0015] The first processing unit determines whether the working status of the electronic brake caliper under test is normal based on the working parameters, including: determining whether the working status of the electronic brake caliper under test is normal based on the working parameters and the pre-stored working parameters of the normal working status.

[0016] In this embodiment of the application, reading the working parameters of the electronic brake caliper under test when it operates can be used to determine whether the working state of the electronic brake caliper is normal, and can also be used for in-depth fault diagnosis to accurately locate hidden faults occurring at the brake caliper controller and motor drive level.

[0017] In one possible implementation, the main control unit also controls the first processing unit to send the corresponding request value to the second processing unit according to the preset test requirements. The second processing unit then drives the electronic brake caliper under test to clamp based on the request value.

[0018] Based on the above technical content, another method for testing the function of electronic brake calipers can be obtained, namely, the first processing unit directly controls the second processing unit, thereby driving the electronic brake caliper. This eliminates the process of servo cylinder movement and generating pedal displacement signals, and directly tests the electronic brake caliper body, thus improving testing efficiency.

[0019] In one possible implementation, the device further includes a temperature chamber and a display unit; the electronic brake caliper under test is disposed in the temperature chamber; the first data acquisition unit and the first processing unit are respectively connected to the display unit.

[0020] In this embodiment, an environmental reliability test can be performed on the electronic brake caliper using a temperature chamber. Simulating the actual operating temperature improves the realism of the test results and verifies the operational reliability of the electronic brake caliper in low-temperature or high-temperature environments. The display unit transfers test data from the backend to the frontend, visualizing the testing process and allowing engineers to understand the testing progress promptly, thus improving the user-friendliness of the testing device.

[0021] In one possible implementation, the device further includes an electronic brake caliper fixing unit and a data acquisition fixing unit; the electronic brake caliper fixing unit fixes the electronic brake caliper to be tested according to the vehicle installation angle requirements; the data acquisition fixing unit fixes the first data acquisition unit and resets the force value after preloading the first data acquisition unit with bolts.

[0022] Here, the electronic brake caliper mounting unit can be used to simulate the installation state of a real vehicle, making the test results more realistic and accurate. The data acquisition mounting unit is used to eliminate the errors introduced by the installation of the first data acquisition unit, realizing a net measurement of the clamping force and ensuring the accuracy of the measurement benchmark.

[0023] In one possible implementation, the device further includes a power supply unit, a fourth data acquisition unit, and a fifth data acquisition unit; the main control unit controls the power supply unit to output the working power supply of the electronic brake caliper under test according to preset parameter requirements, and the second processing unit supplies power to the electronic brake caliper under test based on the working power supply; the fourth data acquisition unit acquires the power supply voltage output by the power supply unit and feeds the power supply voltage back to the first processing unit; the fifth data acquisition unit acquires the power supply current output by the power supply unit and feeds the power supply current back to the first processing unit.

[0024] Here, the power supply unit is used to provide power, and the fourth and fifth data acquisition units are used to monitor whether the power supply unit is supplying power normally, thereby ensuring stable power supply and improving the stability of the test.

[0025] Secondly, embodiments of this application provide a testing method for an electronic brake caliper based on a testing device for an electronic brake caliper according to any one of the first aspects, comprising: driving a pedal unit to output a pedal displacement signal to a second processing unit according to a preset test requirement in a main control unit and a corresponding request value, so that the second processing unit drives the electronic brake caliper under test to clamp based on the pedal displacement signal; acquiring actual clamping force data of the electronic brake caliper under test collected by a first data acquisition unit; determining whether the clamping and release functions of the electronic brake caliper under test are normal based on the actual clamping force data; acquiring working parameters of the electronic brake caliper under test during the clamping process; and determining whether the working state of the electronic brake caliper under test is normal based on the working parameters of the electronic brake caliper under test during the clamping process.

[0026] In one possible implementation, based on the preset test requirements in the main control unit, the pedal unit is driven to output a pedal displacement signal to the second processing unit with a corresponding request value, including: Based on the input force or input displacement corresponding to the preset test requirements in the main control unit as the requested value, the servo electric cylinder is driven to push the electronic pedal through the slide rail guide rod, so that the electronic pedal outputs a pedal displacement signal to the second processing unit.

[0027] In one possible implementation, the clamping and release functions of the electronic brake caliper under test are determined based on actual clamping force data, including: Based on the actual clamping force data, the first time when the electronic brake caliper under test rises from the preset clamping force to the clamping force corresponding to the input force or input displacement, and the second time when the electronic brake caliper under test falls from the clamping force corresponding to the input force or input displacement to the preset clamping force are obtained; based on the first time and the second time, it is determined whether the clamping and releasing functions of the electronic brake caliper under test are normal.

[0028] In one possible implementation, determining whether the electronic brake caliper under test is functioning correctly based on operating parameters includes: Based on the operating parameters and the pre-stored operating parameters of the normal operating state, determine whether the operating state of the electronic brake caliper under test is normal.

[0029] Thirdly, embodiments of this application provide a processing unit, including a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the electronic brake caliper testing method as described in any of the second aspects.

[0030] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements a test method for an electronic brake caliper as described in any of the second aspects.

[0031] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a test device for an electronic brake caliper provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a test device for an electronic brake caliper provided in another embodiment of this application; Figure 4 This is a schematic diagram of the structure of a test device for an electronic brake caliper provided in another embodiment of this application; Figure 5 This is a schematic diagram of the structure of a pedal unit provided in one embodiment of this application; Figure 6 This is a schematic flowchart of a testing method for an electronic brake caliper provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a processing unit provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of a processing unit provided in another embodiment of this application. Detailed Implementation

[0035] The present application will be described more clearly below with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the function of the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0036] It should be understood that, when used in this application specification, the term "comprising" indicates the presence of the described feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0037] It should also be understood that the term “and / or” as used in this application specification means any combination of one or more of the associated listed items, as well as all possible combinations, and includes such combinations.

[0038] In the description of this application, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0040] Furthermore, the term "multiple" mentioned in the embodiments of this application should be interpreted as two or more.

[0041] With the development of vehicle electrification and intelligentization, the popularity of electric vehicles is increasing day by day. Electromechanical braking technology is an important research direction, providing a foundation for meeting higher levels of driver assistance functions.

[0042] Electronic brake calipers are the core of electromechanical braking technology. As a new type of braking device, their structure differs from hydraulic brake calipers. Electronic brake calipers transmit electrical energy through a motor and reduction gear to output braking force to the wheel end, achieving fully decoupled brake-by-wire braking. As a novel braking device, due to the complexity of its internal control logic, traditional testing equipment cannot meet the functional testing requirements of electronic brake calipers. Therefore, it is necessary to provide a testing device and method for electronic brake calipers.

[0043] Considering the application of electronic brake calipers in the vehicle environment, this embodiment simulates the driving process of the electronic brake caliper by outputting the pedal displacement signal through the drive pedal unit, making the test environment closer to actual working conditions. The actual clamping force output by the electronic brake caliper is monitored by the first data acquisition unit and fed back to the first processing unit, thus constructing a complete closed-loop test system and realizing real-time feedback and process monitoring. The first processing unit can test the clamping and releasing functions of the electronic brake caliper, as well as test and analyze the working status of the electronic brake caliper, demonstrating the comprehensiveness of the test function.

[0044] First refer to Figure 1 , Figure 1 The illustration shows an application scenario diagram provided according to an embodiment of the present application, which involves an electronic brake caliper testing device and an electronic brake caliper under test.

[0045] For example, the electronic brake caliper is fixedly installed in the test area of ​​the electronic brake caliper test device. The electronic brake caliper test device can receive the test requirements set by the tester, test the electronic brake caliper according to the test requirements, and feed back the test results to the tester.

[0046] The following is combined Figure 1 Application scenarios, refer to Figures 2-5 This document describes a schematic diagram of the structure of a test apparatus for an electronic brake caliper provided according to an exemplary embodiment of this application. It should be noted that the above application scenarios are shown only to facilitate understanding of the spirit and principles of this application, and the embodiments of this application are not limited in any way. Rather, the embodiments of this application can be applied to any applicable scenario.

[0047] refer to Figure 2 , Figure 2 This is a schematic diagram of a testing device for an electronic brake caliper provided in one embodiment of this application. Figure 2 As shown, the testing device in this embodiment may include a main control unit, a first processing unit, a pedal unit, a second processing unit, and a first data acquisition unit.

[0048] According to the preset test requirements, the main control unit controls the first processing unit to drive the pedal unit to output a pedal displacement signal to the second processing unit with the corresponding request value. The second processing unit drives the electronic brake caliper under test to clamp based on the pedal displacement signal.

[0049] Here, the main control unit can provide an interactive interface to receive test parameters set by testers according to test requirements; the main control unit can also be connected to a terminal device, which provides an interactive interface to receive test parameters set by testers according to test requirements. Optionally, the main control unit can consist of an industrial control computer and a program development platform system acquisition software to realize the functions of test parameter setting, test data feedback, and test data presentation.

[0050] The test requirements may include, but are not limited to, test voltage, test current, clamping force request value, load holding time of the electronic brake caliper under test, pedal input force, and pedal input displacement. This application embodiment does not limit the test parameters and can set them according to actual test requirements.

[0051] Furthermore, to make the test results more closely resemble actual working conditions, this embodiment of the application drives the pedal unit through the first processing unit, causing the pedal unit to output a pedal displacement signal. The second processing unit, based on the pedal displacement signal, drives the electronic brake caliper under test to perform clamping and releasing actions, simulating the driving process of the pedal displacement signal on the electronic brake caliper in the vehicle braking system.

[0052] The first data acquisition unit acquires the actual clamping force data of the electronic brake caliper under test and feeds the actual clamping force data back to the first processing unit; the first processing unit obtains the working parameters of the electronic brake caliper under test during the clamping process; the first processing unit determines whether the clamping and releasing functions of the electronic brake caliper under test are normal based on the actual clamping force data, and determines whether the working status of the electronic brake caliper under test is normal based on the working parameters.

[0053] Here, during the test, the first data acquisition unit collects the actual clamping force data of the electronic brake caliper and feeds it back to the first processing unit. Optionally, the first processing unit can compare the actual clamping force with the clamping force required for the test to determine whether the clamping and releasing function of the electronic brake caliper under test meets the requirements; optionally, the first processing unit can also determine whether the response of the clamping and releasing function of the electronic brake caliper under test is fast by using the curve of the actual clamping force changing over time. It is understandable that braking response speed and braking capacity are both important parameters affecting vehicle safety performance.

[0054] Furthermore, the first processing unit also acquires the operating parameters during the clamping process of the electronic brake caliper under test to determine whether the caliper's operating status is normal. Optionally, the first processing unit can exchange signals with the electronic control unit of the electronic brake caliper under test via a vehicle communication protocol to acquire the aforementioned operating parameters. Here, using both operating parameters and actual clamping force to comprehensively evaluate the performance of the electronic brake caliper helps improve the reliability of the test results.

[0055] In addition, detecting the operating parameters of the electronic brake caliper during the clamping process can also be used to locate faults. When the clamping and releasing function test results of the electronic brake caliper are unsatisfactory, the cause of the fault can be determined by deeply analyzing the operating parameters of its test process.

[0056] In this embodiment, the pedal displacement signal output by the drive pedal unit is used to simulate the driving process of the pedal displacement signal on the electronic brake caliper in the vehicle braking system, making the test environment closer to the actual working conditions. The clamping force actually output by the electronic brake caliper is monitored by the first data acquisition unit and fed back to the first processing unit, thus constructing a complete closed-loop test system and realizing real-time feedback and process monitoring. The first processing unit tests both the clamping and releasing functions of the electronic brake caliper and analyzes the working status of the electronic brake caliper, demonstrating the comprehensiveness of the test function and improving the reliability of the test results.

[0057] Figure 3 This is a schematic diagram of the structure of a testing device for an electronic brake caliper provided in another embodiment of this application. (Refer to...) Figure 3 The testing apparatus for the electronic brake caliper provided in the embodiments of this application will be introduced.

[0058] Reference Figure 3 In one feasible method for generating a pedal displacement signal, the pedal unit includes a servo electric cylinder, a slide rail guide, and an electronic pedal. A first processing unit uses the input force or displacement corresponding to a preset test requirement as the requested value, drives the servo electric cylinder to push the electronic pedal through the slide rail guide, and the electronic pedal outputs a pedal displacement signal to a second processing unit.

[0059] Here, the servo electric cylinder provides linear motion to push the electronic pedal according to the input force requester or input displacement request value provided by the first processing unit, so that the electronic pedal generates a corresponding pedal displacement signal according to the input force or input displacement required by the test. Among them, the input force is used to simulate the force applied to the electronic pedal by the driver during actual vehicle driving; the input displacement is used to simulate the angular displacement of the electronic pedal caused by the driver applying force to the electronic pedal during actual vehicle driving.

[0060] The slide rail guide is an optional structure connecting the servo cylinder and the electronic pedal, transmitting the force from the servo cylinder to the electronic pedal via the slide rail guide. In some embodiments, other force transmission structures besides the slide rail guide can also be used.

[0061] Furthermore, referring to Figure 3 The second processing unit controls the electronic brake caliper under test to perform clamping and releasing actions based on the pedal displacement signal. During the execution of the actions, the first data acquisition unit collects the actual clamping force data of the electronic brake caliper and feeds it back to the first processing unit. Based on the actual clamping force data, the first processing unit determines whether the clamping and releasing functions of the electronic brake caliper under test are normal, and determines whether the working status of the electronic brake caliper under test is normal based on the working parameters.

[0062] This application embodiment simulates the real vehicle braking environment through a servo electric cylinder, slide rail guide rod, and electronic pedal, making the test results more realistic. The first data acquisition unit monitors the actual clamping force output by the electronic brake caliper and feeds it back to the first processing unit, constructing a complete closed-loop test system that realizes real-time feedback and process monitoring. The first processing unit can test the clamping and releasing functions of the electronic brake caliper, as well as test and analyze the working status of the electronic brake caliper, realizing comprehensive testing of the electronic brake caliper.

[0063] In one possible implementation, the first processing unit determines whether the clamping and release functions of the electronic brake caliper under test are normal based on the actual clamping force data, including: the first processing unit obtains the first time when the electronic brake caliper under test rises from the preset clamping force to the clamping force corresponding to the input force or input displacement, and the second time when the electronic brake caliper under test falls from the clamping force corresponding to the input force or input displacement to the preset clamping force; and determines whether the clamping and release functions of the electronic brake caliper under test are normal based on the first time and the second time.

[0064] Here, the clamping force corresponding to the input force or input displacement refers to the clamping force that the electronic brake caliper can stably output when the electronic pedal receives the input force or input displacement required for the test. Understandably, during the test, the electronic brake caliper will change from the current clamping force to the clamping force corresponding to the input force or input displacement and maintain this position for a preset duration. When the clamping force of the electronic brake caliper no longer changes significantly, it is determined to be the clamping force corresponding to the input force or input displacement.

[0065] Furthermore, during data analysis in the first processing unit, a portion of the data can be extracted for analysis. This data extraction can be achieved by setting a preset clamping force, specifically by extracting the data between the preset clamping force and the clamping force corresponding to the input force or input displacement.

[0066] In some embodiments, the value of the preset clamping force can be determined with reference to the test accuracy range of the first data acquisition unit. For example, the first data acquisition unit can be a ring force sensor. If the ring force sensor has higher accuracy in data acquisition of forces greater than or equal to 500 Newtons (N), the preset clamping force can be set to 500N.

[0067] Furthermore, the first processing unit analyzes and judges the clamping and releasing function of the electronic brake caliper based on the actual clamping force data at multiple time points during the test, and obtains the test results. The first time point reflects the rate of change of clamping force when the electronic brake caliper performs the clamping action, and the second time point reflects the rate of change of clamping force when the electronic brake caliper performs the releasing action. By analyzing the first time point during the clamping process and the second time point during the releasing process, it can be determined whether the clamping and releasing functions of the electronic brake caliper meet the braking requirements.

[0068] It should be noted that the braking requirement includes achieving braking within a preset time. Understandably, in actual vehicle operation, there will be situations that require emergency braking, which requires the electronic brake caliper to quickly achieve a large clamping force.

[0069] Reference Figure 3 In one possible implementation, the device further includes a second data acquisition unit and a third data acquisition unit; the second data acquisition unit acquires the thrust applied to the electronic pedal by the servo electric cylinder and feeds the thrust back to the first processing unit; the third data acquisition unit acquires the displacement applied to the electronic pedal by the servo electric cylinder and feeds the displacement back to the first processing unit.

[0070] Here, the second data acquisition unit can be a device or equipment with force detection function, and optionally, it can be a force sensor, such as an S-type force sensor; the third data acquisition unit can be a device or equipment with displacement detection function, such as a displacement sensor.

[0071] This application embodiment achieves closed-loop control of the servo electric cylinder through information feedback, so as to ensure that the thrust applied by the servo electric cylinder to the electronic pedal meets the input force required by the test, and to ensure that the displacement applied by the servo electric cylinder to the electronic pedal meets the input displacement required by the test, thereby improving the test accuracy and reliability.

[0072] In one possible implementation, the operating parameters are those read by the first processing unit from a preset file when the electronic brake caliper under test is in operation. These operating parameters include the actual position of the internal motor, the motor angle, the motor quadrature-axis current, and the motor direct-axis current. Based on these operating parameters, the first processing unit determines whether the operating state of the electronic brake caliper under test is normal, including: determining whether the operating state of the electronic brake caliper under test is normal based on the operating parameters and the pre-stored operating parameters for normal operating states.

[0073] For example, the first processing unit can communicate with the electronic control unit inside the electronic brake caliper under test to acquire operating parameters. Optionally, the first processing unit communicates with the electronic control unit inside the electronic brake caliper under test via a Controller Area Network (CAN) bus, and the preset file can be a text-formatted database file, such as a DBC file (Database for CAN).

[0074] Furthermore, the operating parameters for normal working conditions can be determined based on the theoretical design parameters of the electronic brake caliper. By comparing the actual operating parameters with the theoretical design parameters, it can be determined whether the electronic brake caliper is in normal working condition.

[0075] Here, the operating parameters of the electronic brake caliper under test can be used to determine whether the working state of the electronic brake caliper is normal, and can also be used for in-depth fault diagnosis to accurately locate hidden faults occurring at the brake caliper controller and motor drive level.

[0076] Reference Figure 3 The first processing unit can be connected to the second processing unit. In one possible implementation, the main control unit also controls the first processing unit to send the corresponding request value to the second processing unit according to the preset test requirements, and the second processing unit drives the electronic brake caliper under test to clamp based on the request value.

[0077] Understandably, the process of servo cylinder movement and generating pedal displacement signals is omitted here. The first processing unit directly sends the corresponding request value to the second processing unit to control the second processing unit to drive the electronic brake caliper, which can effectively improve testing efficiency.

[0078] In one possible implementation, the testing device for the electronic brake caliper provided in this application embodiment further includes a power supply unit, a fourth data acquisition unit, and a fifth data acquisition unit.

[0079] The main control unit controls the power supply unit to output the working power of the electronic brake caliper under test according to the preset parameter requirements, and the second processing unit supplies power to the electronic brake caliper under test based on the working power.

[0080] Optionally, the second processing unit can determine whether to supply power to the electronic brake caliper under test based on the pedal displacement signal sent by the electronic pedal or the request value sent by the first processing unit. For example, after receiving the pedal displacement signal, the second processing unit outputs the electrical signal from the power supply unit to the electronic brake caliper to drive it to perform clamping or releasing actions.

[0081] Here, the power supply unit can be a programmable power supply whose output voltage, current and other parameters can be controlled by computer software, thereby providing power to electronic brake calipers with different power supply requirements.

[0082] Furthermore, if the power supply unit is a DC power supply, the second processing unit can convert the DC power into AC power and output it to the electronic brake caliper under test. If the power supply unit is an AC power supply, the second processing unit can directly output it to the electronic brake caliper under test. Optionally, the second processing unit can be an Electronic Control Unit (ECU).

[0083] The fourth data acquisition unit acquires the power supply voltage output by the power supply unit and feeds the power supply voltage back to the first processing unit; the fifth data acquisition unit acquires the power supply current output by the power supply unit and feeds the power supply current back to the first processing unit.

[0084] The fourth data acquisition unit is a device with voltage detection function, such as a voltage sensor. The fifth data acquisition unit is a device with current detection function, such as a current sensor.

[0085] Here, by monitoring the supply voltage and current, the stability and safety of the power supply can be ensured, thereby improving the accuracy of the test results. Optionally, the supply current can be limited within the equipment's protection current range to ensure the safety of the test.

[0086] In one possible implementation, the testing device for electronic brake calipers provided in this application embodiment further includes a temperature chamber and a display unit; the electronic brake caliper under test is placed in the temperature chamber; the first data acquisition unit and the first processing unit are respectively connected to the display unit.

[0087] Among these methods, a temperature chamber can be used to conduct environmental reliability tests on electronic brake calipers. Simulating the temperature of actual operating conditions can improve the realism of the test results. It can also verify the operational reliability of electronic brake calipers in low-temperature or high-temperature environments. For example, electronic brake calipers can be tested within a temperature range of -40℃ to 180℃.

[0088] Furthermore, the display unit is a device or apparatus with display functionality, such as a computer monitor. The display unit is used to display test data, such as the actual clamping force. Here, the display unit can be a standalone display device or a display screen integrated into the testing apparatus. This embodiment of the application achieves visualization of the testing process by setting up a display unit, which helps engineers understand the testing progress in a timely manner and improves the user-friendliness of the testing apparatus.

[0089] In one possible implementation, the testing device for electronic brake calipers provided in this application embodiment further includes an electronic brake caliper fixing unit and a data acquisition fixing unit; the electronic brake caliper fixing unit fixes the electronic brake caliper to be tested according to the vehicle installation angle requirements; the data acquisition fixing unit fixes the first data acquisition unit, and then resets the force value after preloading the first data acquisition unit with bolts.

[0090] Among them, the electronic brake caliper fixing unit can be used to simulate the installation state of a real vehicle, making the test results more realistic and accurate.

[0091] Furthermore, the first data acquisition unit can be a device or equipment with force detection function, and optionally, it can be a force sensor, such as a ring force sensor. Correspondingly, the data acquisition fixing unit is a ring force sensor fixing fixture installed inside the electronic brake caliper under test. The ring force sensor fixing fixture eliminates errors introduced during the installation of the ring force sensor through bolts, achieving a net measurement of the clamping force and ensuring the accuracy of the measurement reference.

[0092] Figure 4 This is a schematic diagram of the structure of a testing device for an electronic brake caliper provided in another embodiment of this application. Figure 5 This is a schematic diagram of the structure of a pedal unit provided in an embodiment of this application. Figure 4 and Figure 5 An example is given of the distribution and connection of some functional units in a feasible test device.

[0093] Reference Figure 4 The testing device includes a main control unit 1, a programmable power supply 2, a display unit 3, a servo electric cylinder 4, a displacement sensor 5, a temperature chamber 6, an electronic brake caliper fixing unit 7, and a pedal fixing fixture 8. Figure 4 The electronic brake caliper 9 under test was also displayed. (Reference) Figure 5 It includes an electric cylinder fixing unit 10, an S-shaped force sensor 11, a servo electric cylinder 4, a pedal fixing fixture 8, an electronic pedal 12, and a slide rail guide rod 13.

[0094] Among them, reference Figure 4 It can be seen that the main control unit 1 and the programmable power supply 2 are located in the same area, and the display unit 3 is located outside the test device to display test data or test results. The servo cylinder 4 is located inside the test device, and its working process can be seen through the observation window of the test device; the displacement sensor 5 is connected to the servo cylinder 4 to detect the displacement generated by the linear motion of the servo cylinder 4; the electronic brake caliper 9 under test is fixed to the bottom of the temperature chamber 6 through the electronic brake caliper fixing unit 7.

[0095] Reference Figure 4 and Figure 5It can be seen that the pedal fixing fixture 8 is used to fix the electronic pedal 12 to the side of the temperature chamber 6. At the same time, the electronic pedal 12 and the servo cylinder 4 are connected by the slide rail guide rod 13. The force output by the servo cylinder 4 is transmitted to the electronic pedal 12 through the slide rail guide rod 13. The cylinder fixing unit 10 is used to fix the servo cylinder 4; the S-shaped force sensor 11 is connected to the servo cylinder 4 to detect the force generated by the linear motion of the servo cylinder 4.

[0096] The testing apparatus for the electronic brake caliper provided in this application embodiment is described using a practical test example.

[0097] The tester set the test voltage to 13.5V, the equipment protection current to 60A, the clamping force request value, and the loading and holding time of the electronic brake caliper under test on the main control unit.

[0098] Upon starting the test, the power supply unit outputs 13.5V to the second processing unit based on the test voltage. A voltage sensor detects the supply voltage output by the power supply unit and feeds it back to the first processing unit; a current sensor detects the current in the circuit after the second processing unit drives the electronic brake caliper under test, and feeds it back to the first processing unit.

[0099] The first processing unit sends the clamping force request value to the second processing unit via a CAN message signal through a DBC file, based on the clamping force request value. The second processing unit then uses its internal algorithm as the force model to directly drive the electronic brake caliper under test to perform the clamping action.

[0100] The ring-shaped force sensor feeds back the actual clamping force data to the second processing unit to form a closed loop, and simultaneously feeds it back to the first processing unit. At this time, the display unit displays the actual clamping force data.

[0101] During the test, the electronic brake caliper under test repeatedly performs clamping and releasing actions. When the action reaches a stable state and the clamping force no longer increases or decreases, it is held for a period of time, which is the aforementioned load holding time of the electronic brake caliper under test.

[0102] The first processing unit processes the actual clamping force data fed back by the ring force sensor to obtain the time when the clamping force reaches the clamping force request value from 500N, i.e., the clamping time; and obtains the time when the clamping force starts to decrease from the clamping force request value to 500N, i.e., the release time.

[0103] The first processing unit also reads the internal operating parameters of the electronic brake caliper under test through the DBC file, including but not limited to the actual position of the internal motor, the motor angle, the motor quadrature axis current and the motor direct axis current.

[0104] After completing a set of tests, the first processing unit records the data fed back by each sensor, as well as the internal operating parameters of the electronic brake caliper during the test.

[0105] The testing apparatus for the electronic brake caliper provided in this application embodiment will be described using another practical test example.

[0106] The testers set the test voltage to 13.5V, the equipment protection current to 60A, the pedal input force or input displacement, the servo electric cylinder loading and release speed to 200mm / s, and the loading and holding time of the electronic brake caliper under test on the main control unit.

[0107] Upon starting the test, the power supply unit outputs 13.5V to the second processing unit based on the test voltage. A voltage sensor detects the supply voltage output by the power supply unit and feeds it back to the first processing unit; a current sensor detects the current in the circuit after the second processing unit drives the electronic brake caliper under test, and feeds it back to the first processing unit.

[0108] The second processing unit, based on the pedal input force or displacement and the loading and releasing speed of the servo electric cylinder, drives the servo electric S-shaped force sensor and displacement sensor to actuate, pushing the pedal input force or displacement to the electronic pedal via the slide rail guide rod, generating a pedal displacement signal. The second processing unit then drives the electronic brake caliper under test to perform a clamping action based on the pedal displacement signal.

[0109] The ring-shaped force sensor feeds back the actual clamping force data to the second processing unit to form a closed loop, and simultaneously feeds it back to the first processing unit. At this time, the display unit displays the actual clamping force data.

[0110] During the test, the electronic brake caliper under test repeatedly performs clamping and releasing actions. When the action reaches a stable state and the clamping force no longer increases or decreases, it is held for a period of time, which is the aforementioned load holding time.

[0111] The first processing unit processes the actual clamping force data fed back by the ring force sensor to obtain the time when the clamping force reaches the clamping force request value from 500N, i.e., the clamping time; and obtains the time when the clamping force starts to decrease from the clamping force request value to 500N, i.e., the release time.

[0112] The first processing unit also reads the internal operating parameters of the electronic brake caliper under test through the DBC file, including but not limited to the actual position of the internal motor, the motor angle, the motor quadrature axis current and the motor direct axis current.

[0113] After completing a set of tests, the first processing unit records the data fed back by each sensor, as well as the internal operating parameters of the electronic brake caliper during the test.

[0114] This application provides two methods for driving the electronic brake caliper: one involves a first processing unit driving a pedal unit to output a pedal displacement signal, and a second processing unit driving the electronic brake caliper through the pedal displacement signal; the other involves the first processing unit directly controlling the second processing unit to drive the electronic brake caliper. The testing device provided in this application can simulate the operating conditions of the entire vehicle braking system for electronic brake caliper testing, and can also perform efficient testing on the electronic brake caliper itself. Furthermore, the first processing unit receives data from various data acquisition units and acquires the operating parameters of the electronic brake caliper under test, achieving comprehensive monitoring and recording of the testing process. Furthermore, the first processing unit can test both the clamping and releasing functions of the electronic brake caliper, as well as analyze the working state of the electronic brake caliper, demonstrating the comprehensiveness of the testing functions.

[0115] Figure 6 This is a schematic flowchart of a testing method for an electronic brake caliper provided in one embodiment of this application. This application also provides a testing method for an electronic brake caliper based on the aforementioned testing device. This method is applied to a first processing unit, as described above. Figure 6 The method includes: S601. According to the test requirements preset in the main control unit, the pedal unit is driven to output a pedal displacement signal to the second processing unit with the corresponding request value, so that the second processing unit drives the electronic brake caliper under test to clamp based on the pedal displacement signal. S602. Obtain the actual clamping force data of the electronic brake caliper under test collected by the first data acquisition unit, and determine whether the clamping and release functions of the electronic brake caliper under test are normal based on the actual clamping force data, and determine whether the working state of the electronic brake caliper under test is normal based on the working parameters during the clamping process of the electronic brake caliper under test.

[0116] This application embodiment simulates the driving process of the electronic brake caliper by outputting a pedal displacement signal through a drive pedal unit, making the test environment closer to actual working conditions. The actual clamping force output by the electronic brake caliper is monitored by a first data acquisition unit and fed back to a first processing unit, thus constructing a complete closed-loop test system and realizing real-time feedback and process monitoring. The first processing unit can test the clamping and releasing functions of the electronic brake caliper, as well as test and analyze the working status of the electronic brake caliper, realizing comprehensive testing of the electronic brake caliper.

[0117] In one possible implementation, step S601 involves driving the pedal unit to output a pedal displacement signal to the second processing unit based on the preset test requirements in the main control unit and the corresponding request value, including: Based on the input force or input displacement corresponding to the preset test requirements in the main control unit as the requested value, the servo electric cylinder is driven to push the electronic pedal through the slide rail guide rod, so that the electronic pedal outputs a pedal displacement signal to the second processing unit.

[0118] In one possible implementation, step S602 involves determining whether the clamping and release functions of the electronic brake caliper under test are normal based on the actual clamping force data, including: Based on the actual clamping force data, the first time when the electronic brake caliper under test rises from the preset clamping force to the clamping force corresponding to the input force or input displacement, and the second time when the electronic brake caliper under test falls from the clamping force corresponding to the input force or input displacement to the preset clamping force are obtained; based on the first time and the second time, it is determined whether the clamping and releasing functions of the electronic brake caliper under test are normal.

[0119] The first time interval reflects the rate of change of clamping force when the electronic brake caliper performs the clamping action, and the second time interval reflects the rate of change of clamping force when the electronic brake caliper performs the release action. By measuring the first time interval during the clamping process and the second time interval during the release process, it can be determined whether the clamping and release functions of the electronic brake caliper meet the braking requirements.

[0120] In one possible implementation, step S602 involves determining whether the working state of the electronic brake caliper under test is normal based on the operating parameters, including: Based on the operating parameters and the pre-stored operating parameters of the normal operating state, determine whether the operating state of the electronic brake caliper under test is normal.

[0121] The operating parameters for normal working conditions can be determined based on the theoretical design parameters of the electronic brake caliper. By comparing the actual operating parameters with the theoretical design parameters, it can be determined whether the electronic brake caliper is in normal working condition.

[0122] Here, the operating parameters of the electronic brake caliper under test can be used to determine whether the working state of the electronic brake caliper is normal, and can also be used for in-depth fault diagnosis to accurately locate hidden faults occurring at the brake caliper controller and motor drive level.

[0123] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0124] Figure 7 This is a schematic diagram of the structure of a processing unit provided in an embodiment of this application. As shown in Figure 7, the processing unit provided in this embodiment may include a control module and an analysis module.

[0125] The control module is used to drive the pedal unit to output a pedal displacement signal to the second processing unit according to the preset test requirements in the main control unit and the corresponding request value, so that the second processing unit drives the electronic brake caliper under test to clamp based on the pedal displacement signal. The analysis module is used to acquire the actual clamping force data of the electronic brake caliper under test collected by the first data acquisition unit, and to determine whether the clamping and release functions of the electronic brake caliper under test are normal based on the actual clamping force data, and to determine whether the working status of the electronic brake caliper under test is normal based on the working parameters during the clamping process.

[0126] In one possible implementation, the control module is specifically used to drive the servo electric cylinder to push the electronic pedal through the slide rail guide rod according to the input force or input displacement corresponding to the preset test requirements in the main control unit, so that the pedal unit outputs the pedal displacement signal to the second processing unit.

[0127] In one possible implementation, the analysis module is specifically used to obtain, based on the actual clamping force data, the first time when the electronic brake caliper under test rises from the preset clamping force to the clamping force corresponding to the input force or input displacement, and the second time when the electronic brake caliper under test falls from the clamping force corresponding to the input force or input displacement to the preset clamping force; the analysis module is also specifically used to determine, based on the first time and the second time, whether the clamping and releasing functions of the electronic brake caliper under test are normal.

[0128] In one possible implementation, the analysis module is further used to determine whether the working state of the electronic brake caliper under test is normal based on the working parameters and the pre-stored working parameters of the normal working state.

[0129] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0130] Figure 8 This is a schematic diagram of the structure of a processing unit provided in another embodiment of this application. For example... Figure 8 As shown, the processing unit 800 of this embodiment includes a processor 810 and a memory 820, wherein the memory 820 stores a computer program 821 that can run on the processor 810. When the processor 810 executes the computer program 821, it implements the steps in any of the above method embodiments. Alternatively, when the processor 810 executes the computer program 821, it implements the functions of each module / unit in the above device embodiments.

[0131] For example, computer program 821 may be divided into one or more modules / units, one or more of which are stored in memory 820 and executed by processor 810 to complete this application. One or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 821 in processing unit 800.

[0132] Those skilled in the art will understand that Figure 8 This is merely an example of a processing unit and does not constitute a limitation on the processing unit. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0133] The processor 810 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0134] The memory 820 can be a hard disk or RAM, such as an external hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, or a Flash Card. The memory 820 is used to store computer programs and other programs and data required by the processing unit. The memory 820 can also be used to temporarily store data that has been output or will be output.

[0135] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0136] An embodiment of this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described test method for the electronic brake caliper.

[0137] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0138] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0139] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0140] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0141] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0142] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0143] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A testing device for an electronic brake caliper, characterized in that, The device comprises a master control unit, a first processing unit, a pedal unit, a second processing unit and a first data acquisition unit; The master control unit controls the first processing unit to drive the pedal unit to output a pedal displacement signal to the second processing unit according to a preset test requirement and a corresponding request value, and the second processing unit drives the electronic brake caliper to be tested to clamp based on the pedal displacement signal; The first data acquisition unit acquires actual clamping force data of the electronic brake caliper to be tested and feeds back the actual clamping force data to the first processing unit; The first processing unit acquires working parameters in the clamping process of the electronic brake caliper to be tested; The first processing unit determines whether the clamping and releasing functions of the electronic brake caliper to be tested are normal according to the actual clamping force data, and determines whether the working state of the electronic brake caliper to be tested is normal according to the working parameters.

2. The testing device for an electronic brake caliper according to claim 1, characterized in that, The pedal unit comprises a servo cylinder, a slide rail guide rod and an electronic pedal; The first processing unit drives the servo cylinder to push the electronic pedal through the slide rail guide rod with the input force or input displacement corresponding to the preset test requirement as the request value, and the electronic pedal outputs a pedal displacement signal to the second processing unit.

3. The testing device for an electronic brake caliper according to claim 2, characterized in that, The first processing unit determines whether the clamping and releasing functions of the electronic brake caliper to be tested are normal according to the actual clamping force data, comprising: The first processing unit obtains a first time for the electronic brake caliper to be tested to rise from a preset clamping force to a clamping force corresponding to the input force or input displacement, and a second time for the electronic brake caliper to be tested to fall from the clamping force corresponding to the input force or input displacement to the preset clamping force according to the actual clamping force data; Based on the first time and the second time, it is determined whether the clamping and releasing functions of the electronic brake caliper to be tested are normal.

4. The testing device for an electronic brake caliper according to claim 2, characterized in that, The device further comprises a second data acquisition unit and a third data acquisition unit; The second data acquisition unit acquires the pushing force of the servo cylinder applied to the electronic pedal and feeds back the pushing force to the first processing unit; The third data acquisition unit acquires the displacement of the servo cylinder applied to the electronic pedal and feeds back the displacement to the first processing unit.

5. The test device for an electronic brake caliper according to claim 1, characterized in that, The working parameters are working parameters of the electronic brake caliper to be tested when the first processing unit reads the working parameters through a preset file; the working parameters comprise an internal motor actual position, a motor angle, a motor cross-axis current and a motor direct-axis current; The first processing unit determines whether the working state of the electronic brake caliper to be tested is normal according to the working parameters, comprising: According to the working parameters and the pre-stored normal working state working parameters, it is determined whether the working state of the electronic brake caliper to be tested is normal.

6. The test device for an electronic brake caliper according to claim 1, characterized in that, The master control unit also controls the first processing unit to send corresponding request values to the second processing unit according to a preset test requirement, and the second processing unit drives the electronic brake caliper to be tested to clamp based on the request values.

7. The test device for an electronic brake caliper according to claim 1, characterized in that, The device further comprises a temperature box and a display unit; The to-be-tested electronic brake caliper is arranged in the temperature box; the first data acquisition unit and the first processing unit are connected with the display unit respectively.

8. The test device for an electronic brake caliper according to claim 1, characterized in that, The device further comprises an electronic brake caliper fixing unit and a data acquisition fixing unit. The electronic brake caliper fixing unit fixes the to-be-tested electronic brake caliper according to the installation angle requirement of the whole vehicle; the data acquisition fixing unit fixes the first data acquisition unit, and preloads a pre-tightening force on the first data acquisition unit through a bolt and then clears the force value.

9. The test device for an electronic brake caliper according to claim 1, characterized in that, The device further comprises a power supply unit, a fourth data acquisition unit and a fifth data acquisition unit. The main control unit controls the power supply unit to output the working power supply of the to-be-tested electronic brake caliper according to the preset parameter requirement; the second processing unit supplies power to the to-be-tested electronic brake caliper based on the working power supply; The fourth data acquisition unit acquires the power supply voltage output by the power supply unit and feeds back the power supply voltage to the first processing unit; The fifth data acquisition unit acquires the power supply current output by the power supply unit and feeds back the power supply current to the first processing unit.

10. A method of testing an electronic brake caliper based on the test device of an electronic brake caliper according to any one of claims 1 to 9, characterized in that, The method is applied to the first processing unit, and the method comprises the following steps: According to the test requirement preset in the main control unit, the pedal unit outputs a pedal displacement signal to the second processing unit at a corresponding request value, so that the second processing unit drives the to-be-tested electronic brake caliper to clamp based on the pedal displacement signal; The actual clamping force data of the to-be-tested electronic brake caliper acquired by the first data acquisition unit is acquired, whether the clamping and releasing functions of the to-be-tested electronic brake caliper are normal is determined according to the actual clamping force data, the working parameters in the clamping process of the to-be-tested electronic brake caliper are acquired, and whether the working state of the to-be-tested electronic brake caliper is normal is determined according to the working parameters in the clamping process of the to-be-tested electronic brake caliper.

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