Analog switch for EPB system loop simulation test

Abstract

The utility model provides an analog switch used for an EPB system loop simulation test. The analog switch comprises a signal conversion module and an execution switch module. The signal conversion module comprises a first conversion unit and a second conversion unit, the first conversion unit is used for receiving a digital signal sent by external control equipment and converting the digital signal into a voltage signal, and the second conversion unit is used for amplifying the voltage signal; and the input end and the output end of the execution switch module are electrically connected to the second conversion unit and the EPB system respectively so as to adjust the EPB system to be in a neutral gear, application or release state according to the amplified voltage signal. According to the EPB system loop simulation test device, the problem of low test efficiency caused by high manual participation degree and complex structure in the existing mode of carrying out EPB system loop simulation test by adopting an entity EPB switch can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of EPB analog switches, and more specifically, relates to an analog switch for loop simulation testing of an EPB system. Background Art

[0002] The EPB system is a technology that realizes parking braking through electronic control. It replaces the traditional mechanical lever and tire steel cable, providing a safer and more convenient parking braking method. The EPB system integrates the temporary braking during driving and the long-term braking after parking, and realizes parking braking through electronic control.

[0003] The existing operation for loop simulation testing of the EPB system is to connect the physical EPB switch to the corresponding control pin of the EPB system, then pull up the EPB switch according to the test requirements, and then the tester manually operates the EPB button to adjust the state of the control end of the EPB system. However, this operation method has a high degree of manual participation, resulting in a reduction in test efficiency, and the structure of the EPB switch used for testing is relatively complex, which also increases the test cost and test workload. Therefore, the existing method of using a physical EPB switch for loop simulation testing of the EPB system still has many drawbacks and is not conducive to the test operation of the EPB system, and needs to be further improved. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the existing method of using a physical EPB switch for loop simulation testing of the EPB system has a high degree of manual participation and a complex structure, resulting in a reduction in test efficiency.

[0005] To achieve the above purpose, the utility model provides an analog switch for loop simulation testing of an EPB system, including a signal conversion module and an execution switch module;

[0006] The signal conversion module includes a first conversion unit and a second conversion unit. The first conversion unit is used to receive the digital signal sent by an external control device and convert the digital signal into a voltage signal, and the second conversion unit is used to amplify the voltage signal;

[0007] The input end and the output end of the execution switch module are respectively electrically connected to the second conversion unit and the control end of the EPB system, so as to adjust the control end to be in a neutral, applied or released state according to the amplified voltage signal.

[0008] Optionally, the execution switch module includes a first execution switch and a second execution switch,

[0009] When both the first execution switch and the second execution switch are in the normally open mode, the control end is in the neutral state;

[0010] When the first execution switch is in the normally closed mode and the second execution switch is in the normally open mode, the control end is in the applied state;

[0011] When the first execution switch is in the normally open mode and the second execution switch is in the normally closed mode, the control end is in the released state.

[0012] Optionally, both the first execution switch and the second execution switch are relay switches.

[0013] Optionally, the first conversion unit is a microcontroller.

[0014] Optionally, the first conversion unit has a communication interface, and the communication interface is connected to the external control device.

[0015] Optionally, the second conversion unit is a triode.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The analog switch for EPB system loop simulation test proposed by the present utility model, by setting a signal conversion module and an execution switch module, can first use the first conversion unit to receive the digital signal sent by the external control device, convert the digital signal into a voltage signal, and then use the second conversion unit to amplify the voltage signal, so that the execution switch module can adjust the control end to be in the neutral, applied or released state according to the amplified voltage signal. Compared with the existing method of using a physical EPB switch for EPB system loop simulation test, the analog switch of the present utility model greatly reduces the manual participation, improves the automation degree of the test operation, thereby can improve the test efficiency, and the connection structure of the analog switch is simple, can effectively reduce the test cost and test workload of the EPB system, and is beneficial to the test operation of the EPB system.

[0018] According to the above content, it can be known that the present utility model can effectively solve the problem that the existing method of using a physical EPB switch for EPB system loop simulation test has a high manual participation and a complex structure, resulting in a reduction in test efficiency.

[0019] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0020] The present utility model can be better understood by referring to the descriptions made in conjunction with the accompanying drawings below, in which the same or similar reference numerals are used throughout the drawings to represent the same or similar components.

[0021] Figure 1 Fig. 4 shows a schematic block diagram of a simulation switch for EPB system loop simulation test according to an embodiment of the present utility model;

[0022] Figure 2 Fig. 8 shows a schematic diagram of the circuit structure of an execution switch module according to an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] 1 - First execution switch;

[0025] 2 - Second execution switch. Detailed implementation manners

[0026] In order to enable those skilled in the art to more fully understand the technical solutions of the present utility model, the exemplary implementation manners of the present utility model will be described more comprehensively and in detail below in conjunction with the accompanying drawings. Obviously, one or more of the implementation manners of the present utility model described below are merely one or more of the specific manners that can implement the technical solutions of the present utility model, and are not exhaustive. It should be understood that other manners belonging to a general inventive concept of the present utility model can be adopted to implement the technical solutions of the present utility model, and should not be limited by the exemplary implementation manners described. Based on one or more implementation manners of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment: Figure 1 Fig. 27 shows a schematic block diagram of a simulation switch for EPB system loop simulation test according to an embodiment of the present utility model.

[0028] Referring to Figure 1 , an embodiment of the present utility model provides a simulation switch for EPB system loop simulation test, including a signal conversion module and an execution switch module;

[0029] The signal conversion module includes a first conversion unit and a second conversion unit. The first conversion unit is used to receive the digital signal sent by an external control device and convert the digital signal into a voltage signal, and the second conversion unit is used to amplify the voltage signal;

[0030] The input end and the output end of the execution switch module are respectively electrically connected to the second conversion unit and the control end of the EPB system, so as to adjust the control end to be in the neutral, applied or released state according to the amplified voltage signal.

[0031] In a specific embodiment, the first conversion unit is a microcontroller.

[0032] In an embodiment, the first conversion unit has a communication interface, and the communication interface is connected to an external control device.

[0033] In a specific embodiment, the communication interface is an SPI interface, an I2C interface, a USART interface or a CAN interface.

[0034] In a specific embodiment, the second conversion unit is a triode.

[0035] Specifically, the model of the microcontroller is STM32H750VBT, which can be used as a core processing unit, is electrically connected to an external control device such as a host computer through a communication interface, and can convert the digital signal 1 or 0 input by the external control device into a voltage signal of 3.3V or 0V according to a preset program. When the 3.3V voltage signal is transmitted to the triode, the triode can convert the 3.3V voltage signal into a 12V voltage signal and input it into the execution switch module.

[0036] In an embodiment, the execution switch module includes a first execution switch 1 and a second execution switch 2.

[0037] When both the first execution switch 1 and the second execution switch 2 are in the normally open mode, the control end is in the neutral state.

[0038] When the first execution switch 1 is in the normally closed mode and the second execution switch 2 is in the normally open mode, the control end is in the application state.

[0039] When the first execution switch 1 is in the normally open mode and the second execution switch 2 is in the normally closed mode, the control end is in the release state.

[0040] In a specific embodiment, both the first execution switch 1 and the second execution switch 2 are relay switches. The models of the two relay switches are KA12 and KA14 respectively, and their structures are all prior art and will not be described in detail here.

[0041] Figure 2 The schematic diagram of the circuit structure of the execution switch module according to the embodiment of the present invention is shown, where NO represents the normally open mode, NC represents the normally closed mode, and S1, S2, S3 and S4 all represent contacts.

[0042] As Figure 2 shown, the present invention realizes the adjustment of the state of the control end of the EPB system by controlling the switching of the position states of the two relay switches, specifically including the following three implementation manners:

[0043] In the first embodiment, the triode outputs a voltage signal of 12V to both the relay KA12 and the relay KA14. Both the relay KA12 and the relay KA14 are switched to NO, then S1 is connected to S2, and S3 is connected to S4, and the control end is in the neutral state.

[0044] In the second embodiment, the triode outputs a voltage signal of 0V to the relay KA12 and a voltage signal of 12V to the relay KA14. The relay KA12 is switched to NC, and the relay KA14 is switched to NO, then S1, S3 and S4 are connected, S2 is suspended, and the control end is in the applied state.

[0045] In the third embodiment, the triode outputs a voltage signal of 12V to the relay KA12 and a voltage signal of 0V to the relay KA14. Then the relay KA12 is switched to NO, and the relay KA14 is switched to NC, then S1, S2 and S3 are connected, S4 is suspended, and the control end is in the released state.

[0046] The analog switch for EPB system loop simulation test proposed by the present utility model can first use the first conversion unit to receive the digital signal sent by the external control device and convert the digital signal into a voltage signal by setting a signal conversion module and an execution switch module, and then use the second conversion unit to amplify the voltage signal, so that the execution switch module can adjust the control end to be in the neutral, applied or released state according to the amplified voltage signal.

[0047] Compared with the existing method of using a physical EPB switch for EPB system loop simulation test, the analog switch of the present utility model greatly reduces the degree of manual participation, improves the automation degree of the test operation, thereby can improve the test efficiency, and the connection structure of the analog switch is simple, which can effectively reduce the test cost and test workload of the EPB system and is beneficial to the test operation of the EPB system.

[0048] Although one or more embodiments of the present utility model have been described above, those of ordinary skill in the art should know that the present utility model can be implemented in any other form without departing from its gist and scope. Therefore, the above-described embodiments are illustrative rather than restrictive, and many modifications and substitutions are obvious to those of ordinary skill in the art without departing from the spirit and scope of the present utility model as defined by the appended claims.

Claims

1. An analog switch for EPB system loop simulation test, characterized in that: It includes a signal conversion module and an execution switch module; The signal conversion module includes a first conversion unit and a second conversion unit, the first conversion unit is used to receive a digital signal sent by an external control device and convert the digital signal into a voltage signal, and the second conversion unit is used to amplify the voltage signal; The input end and the output end of the execution switch module are electrically connected to the second conversion unit and the control end of the EPB system respectively, so as to adjust the control end to be in a neutral, applied or released state according to the amplified voltage signal.

2. The analog switch for EPB system loop simulation test according to claim 1, characterized in that: The execution switch module includes a first execution switch and a second execution switch. When the first execution switch and the second execution switch are both in a normally open mode, the control end is in a neutral state; When the first execution switch is in a normally closed mode and the second execution switch is in a normally open mode, the control end is in an application state; When the first execution switch is in a normally open mode and the second execution switch is in a normally closed mode, the control end is in a released state.

3. The analog switch for EPB system loop simulation test according to claim 2, characterized in that: The first execution switch and the second execution switch are both relay switches.

4. The analog switch for EPB system loop simulation test according to claim 1, characterized in that: The first conversion unit is a microcontroller.

5. The analog switch for EPB system loop simulation test according to claim 1, characterized in that: The first conversion unit has a communication interface, and the communication interface is connected to the external control device.

6. The analog switch for EPB system loop simulation test according to claim 1, characterized in that: The second conversion unit is a triode.

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