Durability testing device for parking actuator of electromechanical brake

Abstract

The utility model discloses a durability test device for a parking actuator of an electronic mechanical brake, which comprises a circulation control module, a first control element and a second control element, and the cycle control module is used for sequentially driving the first control element and the second control element to control the parking actuator to execute the pulling and releasing durable cycle, generating durable data in the durable cycle, and determining whether to enter the next durable cycle or not according to the durable data. According to the technical scheme of the utility model, the automation of the durability test of the EMB parking actuator can be realized, the manpower is saved, the cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile component performance testing, in particular to a durability testing device for a parking actuator of an electronic mechanical brake. Background Art

[0002] With the development of vehicle autonomous driving technology, EMB (Electro-mechanical Brake) has received more and more attention and development from OEMs and parts manufacturers in recent years. The test verification of new brake EMB development stage has also put forward new requirements for test equipment.

[0003] The parking systems of traditional vehicle braking systems mainly include handbrakes, EPB (Electrical Park Brake) and cable-type EPB. EMB parking systems can be roughly divided into three types: ① Using the traditional EPB parking system; ② Dual motors; ③ Adding a parking actuator to the single-motor EMB system. Among them, method ③ is a relatively low-cost and simple-structured solution. For the EMB parking system corresponding to method ③, it is necessary to perform a durability test. According to regulatory requirements, the parking system needs to undergo more than 100,000 durability tests, the test cycle is long, and the current existing technology does not disclose a highly automated EMB parking actuator durability test system. Utility Model Content

[0004] One of the purposes of the utility model is to overcome the deficiencies in the prior art and to provide a durability test device for an EMB parking actuator for an electromechanical brake in view of the problems in the prior art of a long test cycle and a low degree of automation of the durability device of the EMB parking actuator.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, the utility model provides a durability testing device for a parking actuator of an electronic mechanical brake, the durability testing device comprising a cycle control module, a first control element and a second control element, the cycle control module being used to sequentially drive the first control element and the second control element to control the parking actuator to perform a durability cycle of pulling up and releasing, generating durability data in the durability cycle, and determining whether to enter the next durability cycle based on the durability data.

[0007] In a preferred embodiment of the present application, the cycle control module is specifically used to: start the collection of durability parameters in the current durability cycle; drive the first control element to control the parking actuator to pull up; keep the parking actuator pulled up during the first waiting time; drive the second control element to control the parking actuator to release; keep the parking actuator released during the second waiting time; update the cycle count of the current durability cycle to obtain the current number of cycles; stop the collection of durability parameters in the current durability cycle; process the collected durability parameters to obtain the durability data of the current durability cycle; determine whether the durability data meets the preset conditions; if it meets the preset conditions, determine whether the cycle count is not less than the preset target number; if so, stop the durability test; if not, return to the next durability cycle; if not, stop the durability test.

[0008] In a preferred embodiment of the present application, the cycle count is equal to the sum of the initial number of times required for the endurance test and the number of cycles of the endurance cycles that have passed plus one.

[0009] In a preferred embodiment of the present application, the first waiting time and the second waiting time are the same.

[0010] In a preferred embodiment of the present application, the durability parameters include current and temperature, and the preset condition is whether the current or the temperature exceeds a preset limit.

[0011] In a preferred embodiment of the present application, the preset limit values ​​include an upper current limit, a lower current limit, an upper temperature limit, and a lower temperature limit.

[0012] In a preferred embodiment of the present application, the cyclic control module controls the parking actuator to be pulled up by inputting a high level to the first control element for a continuous input time and then restoring the input to a low level.

[0013] In a preferred embodiment of the present application, the cycle control module controls the release of the parking actuator by inputting a high level to the second control element for a period of time and then restoring the input low level. The durability test device for the parking actuator of the electromechanical brake disclosed in the utility model can realize the automation of the durability test of the EMB parking actuator, save manpower, reduce costs and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is described with the help of the following drawings:

[0015] Figure 1 It is a schematic diagram of the structure of a durability testing device for a parking actuator of an electronic mechanical brake in an embodiment of the utility model;

[0016] Figure 2It is a schematic diagram of the principle of a durability testing device for a parking actuator of an electronic mechanical brake in an embodiment of the utility model.

[0017] Reference numerals:

[0018] 100-durability test device; 200-parking actuator;

[0019] 110-host computer; 111-loop control module; 112-data acquisition module; 113-data storage module; 120-I / O module; 121-analog input unit; 122-analog output unit; 130-drive module; 131-first control element; 132-second control element; 133-DC power supply; 140-sensor module; 141-current sensor; 142-temperature sensor. DETAILED DESCRIPTION

[0020] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0021] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] The embodiment of the utility model discloses a durability testing device for a parking actuator of an electronic mechanical brake, which is used to test the durability performance of the parking actuator. Figure 1 and Figure 2As shown, the durability test device 100 of this embodiment includes a host computer 110, an I / O module 120, a drive module 130, and a sensor module 140. The host computer 110 includes a cycle control module 111, a data acquisition module 112, and a data storage module 113. The I / O module 120 includes an analog input unit 121 and an analog output unit 122. The drive module 130 includes a first control element 131, a second control element 132, and a DC power supply 133. The first control element 131 and the second control element 132 can be electromagnetic relays. The first control element 131 is connected to the pull-up end of the parking actuator 200, and the second control element 132 is connected to the release end of the parking actuator 200. The drive module 130 realizes the pull-up or release of the parking actuator 200 by closing or disconnecting the two electromagnetic relays. The sensor module 140 includes a current sensor 141 and a temperature sensor 142, which are used to monitor the current and temperature flowing through the parking actuator 200 in real time. The data acquisition module 112 is used to collect the current, temperature and other signals of the sensor module 140 through the I / O module 120, and display them in real time on the interface of the host computer 110, wherein the analog input unit 121 is used to collect the output voltage of the current sensor 141, and the analog output unit 122 is used to output high and low levels to control the first control element 131 and the second control element 132. In this embodiment, the cycle control module 111 controls other modules to perform a durability test on the parking actuator 200. The cycle control module 111 is used to control the analog output unit 122 to alternately output a high level or a low level to the first control element 131 and the second control element 132 respectively, so as to drive the first control element 131 and the second control element 132 in turn to control the parking actuator 200 to perform a durability cycle of pulling up and releasing, generate durability data in the durability cycle, and decide whether to enter the next durability cycle according to the durability data. The durability test device 100 of this embodiment performs a durability test on the parking actuator 200 through the cycle control module 111.

[0023] Specifically, the cycle control module 111 of this embodiment is specifically used to: start the endurance test; initialize the I / O module; set the target number and initial number of the endurance test; start the endurance test; start the collection of the endurance parameters in the current endurance cycle; drive the first control element to control the parking actuator to pull up; keep the parking actuator pulled up during the first waiting time; drive the second control element to control the parking actuator to release; keep the parking actuator released during the second waiting time; update the cycle count of the current endurance cycle to obtain the current cycle number; stop collecting the endurance parameters in the current endurance cycle; process the collected endurance parameters to obtain the endurance data of the current endurance cycle; determine whether the endurance data meets the preset conditions; if it meets the preset conditions, determine whether the cycle count is not less than the preset target number; if so, stop the endurance test; if not, return to the next endurance cycle; if it does not meet the preset conditions, directly stop the endurance test. After obtaining the endurance data of the current endurance cycle, the endurance data can be exported and stored in the data storage module.

[0024] The above-mentioned execution method of the durability test through the cycle control module 111 of this embodiment is only one of the specific implementation methods of the durability test performed by the durability testing device 100 of this embodiment. The execution sequence of the cycle control module 111 is not limited to the above-mentioned sequence, and some individual sequences can be adjusted on the basis of not affecting the durability test of the parking actuator 200. For example, the execution of "updating the cycle count of the current durability cycle to obtain the current cycle count" can be executed at any time between the execution of "starting the collection of durability parameters in the current durability cycle" and the execution of "determining whether the durability data meets the preset conditions", and the execution of "exporting and storing the durability data to the data storage module" can be executed at any time after the execution of "processing the collected durability parameters to obtain the durability data of the current durability cycle" and before entering the next durability cycle.

[0025] During the durability test performed by the durability test device 100 of this embodiment, the sensor module 140 is started to collect durability parameters, wherein the durability parameters include current and temperature, and the current sensor 141 and the temperature sensor 142 are used to collect the current and temperature values ​​during the durability test in real time. The parking actuator 200 is controlled to be pulled up by inputting a high level to the first control element 131 for an input time and then restoring the input low level. The parking actuator 200 is controlled to be released by inputting a high level to the second control element 132 for an input time and then restoring the input low level. The input high level can be 5V, and the input low level can be 0V. The same input high level and low level and the same input time can ensure that the first control element 131 and the second control element 132 control the same stroke and speed of the parking actuator 200 to be pulled up and released, so as to ensure the accuracy of the durability test. The input time is 200 milliseconds. The first waiting time and the second waiting time are the same, ensuring that the test time for the endurance test of the parking actuator 200 in the pulled-up state and the released state is the same, so as to ensure the accuracy of the endurance test. The first waiting time and the second waiting time can be 2000 milliseconds. The cycle count is equal to the sum of the initial number of times required for the endurance test and the number of cycles of the endurance cycle that has passed plus one, where the initial number is the initial number pre-set in "Setting the target number and initial number of endurance test". The preset condition is whether the current or temperature exceeds the preset limit, which includes the current upper limit, current lower limit, temperature upper limit and temperature lower limit.

[0026] In each endurance cycle, the cycle control module 111 updates the cycle count, adds the number of cycles of the endurance cycle that has passed to the initial number plus one, and displays it in real time on the interface of the host computer 110. The cycle control module 111 determines whether the current number of cycles has reached the preset target number. If the current number of cycles is still less than the target number, it continues to enter the next endurance cycle, otherwise the endurance cycle is stopped. After each endurance cycle, the data storage module 113 saves the number of cycles and parameters such as current and temperature to the computer hard disk.

[0027] The durability testing device for the parking actuator of the electronic mechanical brake disclosed by the utility model can realize the automation of the durability testing of the EMB parking actuator, thereby saving manpower, reducing costs and improving efficiency.

[0028] It should be understood that the above description of the specific embodiments of the utility model is only for illustrating the technical route and features of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, but the utility model is not limited to the above specific implementation methods. All changes or modifications made within the scope of the claims of the utility model should be included in the protection scope of the utility model.

Claims

1. A durability test device for a parking actuator of an electromechanical brake, characterized in that: The durability testing device includes a cycle control module, a first control element and a second control element. The cycle control module is used to sequentially drive the first control element and the second control element to control the parking actuator to perform a durability cycle of pulling up and releasing, generate durability data in the durability cycle, and decide whether to enter the next durability cycle based on the durability data.

2. The durability testing device for the parking actuator of the electromechanical brake according to claim 1, characterized in that: The cycle control module is specifically used to: start the collection of durability parameters in the current durability cycle; drive the first control element to control the parking actuator to pull up; keep the parking actuator pulled up during the first waiting time; drive the second control element to control the parking actuator to release; keep the parking actuator released during the second waiting time; update the cycle count of the current durability cycle to obtain the current cycle number; Stop collecting the durability parameters in the current durability cycle; process the collected durability parameters to obtain the durability data of the current durability cycle; determine whether the durability data meets the preset conditions; if it meets the preset conditions, determine whether the cycle count is not less than a preset target number of times; If yes, the durability test is stopped; if no, it returns to the next durability cycle; if it does not meet the requirements, the durability test is stopped.

3. The durability testing device for the parking actuator of the electromechanical brake according to claim 2, characterized in that: The cycle count is equal to the sum of the initial number of times required for the endurance test and the number of cycles of the endurance cycles that have passed plus one.

4. The durability testing device for the parking actuator of the electromechanical brake according to claim 2, characterized in that: The first waiting time and the second waiting time are the same.

5. The durability testing device for the parking actuator of the electromechanical brake according to claim 2, characterized in that: The durability parameters include current and temperature, and the preset condition is whether the current or the temperature exceeds a preset limit.

6. The durability testing device for the parking actuator of the electromechanical brake according to claim 5, characterized in that: The preset limit values ​​include an upper current limit, a lower current limit, an upper temperature limit, and a lower temperature limit.

7. The durability testing device for a parking actuator of an electromechanical brake according to claim 1, characterized in that: The cycle control module controls the parking actuator to be pulled up by inputting a high level to the first control element for a continuous input time and then restoring the input of a low level.

8. The durability testing device for a parking actuator of an electromechanical brake according to claim 1, characterized in that: The cyclic control module controls the release of the parking actuator by inputting a high level to the second control element for a period of time and then restoring the input of a low level.

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