Test device and test method for electromechanical brake system

Abstract

The present invention discloses a test device and a test method for an electronic mechanical brake system, which can be widely used in the field of vehicle testing technology. The present invention fixes the electronic mechanical brake system under test, which includes a plurality of execution modules and front and rear axle control modules, by setting a clamping module. At the same time, after a detection command is sent by a host computer and a corresponding analog signal is generated by a lower computer according to the detection command, each component in the electronic mechanical brake system under test is controlled by the analog signal to perform a synchronous simulation test, and the response data of the simulation test process is collected by a signal acquisition module, so that the host computer can analyze the braking response state of the electronic mechanical brake system under test during the working process according to the response data, and then the performance of the electronic mechanical brake system of the whole vehicle can be effectively and accurately obtained, thereby improving the stability and safety of the vehicle application process.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle testing, and in particular to a testing device and a testing method for an electronic mechanical braking system. Background Art

[0002] In the related technologies, intelligent driving and intelligent assisted driving are the development trend of automobiles. Its realization is inseparable from the support of wire control brake technology. However, the defects of the traditional air brake system can no longer meet the increasingly enhanced performance requirements, especially in unmanned vehicles, which have higher requirements for braking response time and braking distance. So far, the electronic mechanical brake system (EMB) has come into being. It changes the original hydraulic or pneumatic drive part to motor drive, effectively improving the response time and reducing the braking distance. At the same time, the modular design cancels the original boost storage unit components, which can not only save space but also reduce the weight of the vehicle and improve the economy of the vehicle. Through the control system, it can also have ABS, TCS, ESP, ACC and other functions. However, the current test platform is to test the braking force and response effect of a single module in the EMB. However, the electronic mechanical brake system is a highly integrated system. Testing a single module cannot reflect the effect of the electronic mechanical brake system of the whole vehicle. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a testing device and a testing method for an electronic mechanical brake system, which can effectively and accurately obtain the performance of the electronic mechanical brake system of a whole vehicle.

[0004] On the one hand, an embodiment of the present invention provides a testing device for an electromechanical brake system, comprising:

[0005] A clamping module, the clamping module is used to fix the electronic mechanical brake system under test according to the clamping instruction, the electronic mechanical brake system under test includes a plurality of execution modules and front and rear axle control modules;

[0006] A wheel-side power module, wherein the wheel-side power module is used to simulate vehicle braking;

[0007] A signal acquisition module, the signal acquisition module is used to collect response data of the multiple execution modules during the execution of the test process;

[0008] A host computer, the host computer is used to start the response task according to a preset timing, and generate the clamping instruction and the detection command according to the response task; analyze the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer;

[0009] A lower computer, the lower computer is used to receive the clamping instruction and the detection command sent by the upper computer; send the clamping instruction to the clamping module; generate the analog signal according to the detection command, and send the analog signal to the front and rear axle control modules, so that the front and rear axle control modules drive the multiple execution modules to control the wheel-side power module to simulate vehicle braking according to the analog signal; receive the response data sent by the signal acquisition module, and send the response data to the upper computer.

[0010] In some embodiments, before analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer, the upper computer is further used to:

[0011] Receiving the self-test signal of the front and rear axle control module sent by the lower computer;

[0012] When it is determined according to the self-test signal that the front and rear axle control modules are faulty, a fault light lighting signal is generated.

[0013] In some embodiments, before analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer, the upper computer is further used to:

[0014] When it is determined according to the self-test signal that the front and rear axle control modules do not have a fault, obtaining the motor current of the tested electronic mechanical brake system sent by the lower computer;

[0015] When it is determined according to the motor current that the idling drag torque of the electronic mechanical brake system under test exceeds the torque setting value, the human-computer interaction module is controlled to display the motor torque value, where the motor torque value is calculated by the motor current.

[0016] In some embodiments, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer includes:

[0017] Analyzing a response status of each of the plurality of execution modules according to the response data;

[0018] When the response states of the plurality of execution modules all meet the first preset standard, determining the response synchronization of all the execution modules;

[0019] When the response synchronization does not meet a second preset standard, the human-computer interaction module is controlled to display a first value.

[0020] In some embodiments, the step of analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer further includes:

[0021] Analyzing the PWM regulation characteristics of each of the plurality of execution modules according to the response data;

[0022] Determining PWM synchronization of the plurality of execution modules according to the PWM regulation characteristics;

[0023] When the PWM synchronization does not meet a third preset standard, the human-computer interaction module is controlled to display a second value.

[0024] In some embodiments, the host computer is also used to generate a system sensitivity test command and send the system sensitivity test command to the slave computer; the slave computer controls the front and rear axle control modules to generate braking signals of different intensities according to the system sensitivity test command.

[0025] In some embodiments, the clamping module includes a support and a fixing component, and the electronic mechanical brake system under test is fixed to the support via the fixing component.

[0026] On the other hand, an embodiment of the present invention provides a method for testing an electronic mechanical brake system, the method being applied to a host computer, the method comprising:

[0027] Initiate response tasks according to preset timing;

[0028] Generate a clamping instruction and a detection command according to the response task;

[0029] The clamping instruction and the detection command are sent to the lower computer; the lower computer sends the clamping instruction to the clamping module, so that the clamping module fixes the electronic mechanical brake system under test according to the clamping instruction, and the electronic mechanical brake system under test includes multiple execution modules and front and rear axle control modules; the lower computer generates an analog signal according to the detection command, and sends the analog signal to the front and rear axle control module, so that the front and rear axle control module drives the multiple execution modules to control the wheel-side power module to simulate vehicle braking according to the analog signal; the lower computer receives the response data of the multiple execution modules in the test execution process collected by the signal acquisition module;

[0030] The braking response state of the tested electronic mechanical braking system during operation is analyzed according to the response data.

[0031] In some embodiments, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data includes:

[0032] Analyzing a response status of each of the plurality of execution modules according to the response data;

[0033] When the response states of the plurality of execution modules all meet the first preset standard, determining the response synchronization of all the execution modules;

[0034] When the response synchronization does not meet a second preset standard, the human-computer interaction module is controlled to display a first value.

[0035] In some embodiments, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data further includes:

[0036] Analyzing the PWM regulation characteristics of each of the plurality of execution modules according to the response data;

[0037] Determining PWM synchronization of the plurality of execution modules according to the PWM regulation characteristics;

[0038] When the PWM synchronization does not meet a third preset standard, the human-computer interaction module is controlled to display a second value.

[0039] The test device of an electronic mechanical brake system provided by the embodiment of the present invention has the following beneficial effects:

[0040] In this embodiment, a clamping module is set to fix the electronic mechanical brake system under test, which includes multiple execution modules and front and rear axle control modules. At the same time, a detection command is sent by the upper computer, and the lower computer generates a corresponding simulation signal according to the detection command. Then, the various components in the electronic mechanical brake system under test are controlled by the simulation signal to perform synchronous simulation tests, and the response data of the simulation test process is collected by the signal acquisition module, so that the upper computer can analyze the braking response state of the electronic mechanical brake system under test during operation according to the response data, and then the performance of the electronic mechanical brake system of the whole vehicle can be effectively and accurately obtained, thereby improving the stability and safety of the vehicle application process.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0043] Figure 1 A schematic diagram of a module of a testing device for an electromechanical brake system according to an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of an application of a testing device for an electronic mechanical brake system according to an embodiment of the present invention;

[0045] Figure 3The present invention is a flowchart of application data processing of a testing device for an electronic mechanical brake system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0049] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0050] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] Reference Figure 1 , an embodiment of the present invention provides a testing device for an electronic mechanical brake system, comprising:

[0052] A clamping module, the clamping module is used to fix the electronic mechanical brake system under test according to the clamping instruction, the electronic mechanical brake system under test includes a plurality of execution modules and front and rear axle control modules; wherein the clamping module includes a support and a fixing component, the electronic mechanical brake system under test is fixed on the support through the fixing component;

[0053] A wheel-side power module, wherein the wheel-side power module is used to simulate vehicle braking;

[0054] A signal acquisition module, the signal acquisition module is used to collect response data of the multiple execution modules during the execution of the test process;

[0055] A host computer, the host computer is used to start the response task according to a preset timing, and generate the clamping instruction and the detection command according to the response task; analyze the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer;

[0056] A lower computer, the lower computer is used to receive the clamping instruction and the detection command sent by the upper computer; send the clamping instruction to the clamping module; generate the analog signal according to the detection command, and send the analog signal to the front and rear axle control modules, so that the front and rear axle control modules drive the multiple execution modules to control the wheel-side power module to simulate vehicle braking according to the analog signal; receive the response data sent by the signal acquisition module, and send the response data to the upper computer.

[0057] When the test device of this embodiment is applied to an actual test process, Figure 2 As shown, the positions of the four execution modules 220 are fixed respectively by the four clamping modules 210, so that the execution modules 220 can effectively drive the wheel speed and torque of the four front and rear wheels of the vehicle according to the analog signal sent by the wheel-side power module. In this embodiment, the data analyzed by the upper computer can be displayed by the human-machine exchange module, and the lower computer can also receive the operation signal sent by the human-machine exchange module, so that the test process can change the test state according to the operation signal.

[0058] In some embodiments, before analyzing the braking response state of the electronic mechanical brake system under test during operation, the upper computer is also used to receive the self-test signal of the front and rear axle control module sent by the lower computer, and when it is determined that there is a fault in the front and rear axle control module according to the self-test signal, a fault light signal is generated. Among them, the fault light signal can be used to control the on and off state of the fault light. In this embodiment, after determining that there is no fault in the front and rear axle control module, the motor current of the electronic mechanical brake system under test sent by the lower computer is obtained, and it is determined whether the idling drag torque of the electronic mechanical brake system under test exceeds the torque setting value according to the motor current. If it exceeds the torque setting value, the human-computer interaction module is controlled to display the motor torque value calculated by the motor current, so as to prompt the test staff to promptly understand the idling drag torque state of the electronic mechanical brake system under test.

[0059] In some embodiments, when analyzing the braking response state of the tested electronic mechanical braking system during operation, the following steps may be included but are not limited to:

[0060] Analyzing the response status of each of the plurality of execution modules according to the response data;

[0061] When the response states of the plurality of execution modules all meet the first preset standard, determining the response synchronization of all the execution modules;

[0062] When the response synchronization does not meet the second preset standard, the human-computer interaction module is controlled to display the first value.

[0063] In this embodiment, response refers to the time from start to end, and can also be understood as the duration of completion. For example, when the response of the first execution module is 1 second and the response of the second execution module is 2 seconds, it can be determined that the responses of the two execution modules are not synchronized, that is, the response status of the two execution modules does not meet the first preset standard. When the response of the first execution module is 1 second, the responses of the second execution module, the third execution module and the fourth execution module are also 1 second, it can be determined that the responses of the four execution modules are synchronized, that is, the response status of the four execution modules meets the first preset standard.

[0064] In this embodiment, after determining that the response states of the plurality of execution modules meet the first preset standard, the motor current of the electronic mechanical brake system under test is obtained again, and it is determined whether the idling drag torque of the electronic mechanical brake system under test exceeds the torque setting value according to the motor current. If the torque setting value is exceeded, the human-computer interaction module is controlled to display the motor torque value calculated by the motor current; if the torque setting value is not exceeded, the following steps are performed:

[0065] Analyzing the PWM regulation characteristics of each execution module in the plurality of execution modules according to the response data;

[0066] Determine the PWM synchronization of multiple execution modules according to the PWM regulation characteristics;

[0067] When the PWM synchronization does not meet the third preset standard, the human-computer interaction module is controlled to display the second value.

[0068] In this embodiment, PWM refers to the step curve in the response time, which is similar to the ABS function. PWM synchronization comparison refers to comparing the step curves of each wheel. Among them, the step curve is similar to calculus. When the step curve of one wheel is different from the step curves of the other three wheels, it means that the PWM synchronization does not meet the third preset standard. Only when the step curves of the four vehicles are the same, it means that the PWM synchronization meets the third preset standard.

[0069] In some embodiments, after determining that the PWM synchronization meets the third preset standard, the electronic mechanical brake system under test is controlled to perform a system sensitivity test. Specifically, after the upper computer generates a system sensitivity test command, the system sensitivity test command is sent to the lower computer; the lower computer controls the front and rear axle control modules to generate brake signals of different strengths according to the system sensitivity test command.

[0070] When the test device is testing, Figure 3 As shown, the testing process includes the following:

[0071] First, the self-check process of the front and rear axle control modules is carried out. If there is a fault in the front and rear axle control modules, the fault light is controlled to light up and the fault information is displayed on the human-computer interaction module; if there is no fault in the front and rear axle control modules, the idling drag torque detection is carried out. Among them, the idling drag torque detection can be judged by collecting the motor current on the tested electronic mechanical brake system. If the torque determined by the current exceeds the torque setting value, the human-computer interaction module is controlled to display the value including the motor current; if it does not exceed the torque setting value, the brake response test is carried out.

[0072] During the braking response test, the response data of a single subassembly is obtained, that is, the response data of a single execution module is obtained, and it is determined whether the response data meets the first preset standard. If not, the human-computer interaction module is controlled to display the numerical value of the response data of the single subassembly; if it is satisfied, the response synchronization of the four subassemblies is compared. When the response synchronization of the four subassemblies does not meet the second preset standard, the human-computer interaction module is controlled to display the response comparison results of the four subassemblies; if it is satisfied, the braking return drag torque detection is performed. Among them, the braking return drag torque detection can also be judged by collecting the motor current on the tested electronic mechanical braking system. If the torque size determined according to the current exceeds the torque setting value, the human-computer interaction module is controlled to display the numerical value including the motor current; if it does not exceed the torque setting value, the PWM adjustment characteristic detection is performed.

[0073] During the PWM regulation characteristic detection process, it is determined whether the synchronization of the PWM regulation characteristics of the four subassemblies meets the third preset standard. If not, the human-machine interaction module is controlled to display the numerical value including the comparison result of the PWM regulation characteristics of the four subassemblies; if it is satisfied, the sensitivity test of the tested electronic mechanical brake system is performed. During the sensitivity test, the sensitivity state can be determined by the motor torque holding ability under different braking intensities.

[0074] In summary, by testing the electronic mechanical brake system under test through the test device, the performance of the electronic mechanical brake system of the whole vehicle can be obtained effectively and accurately, thereby improving the stability and safety of the vehicle during application.

[0075] An embodiment of the present invention provides a method for testing an electronic mechanical brake system, the method being applied to a host computer, and the method comprising:

[0076] Initiate response tasks according to preset timing;

[0077] Generate a clamping instruction and a detection command according to the response task;

[0078] The clamping instruction and the detection command are sent to the lower computer; the lower computer sends the clamping instruction to the clamping module, so that the clamping module fixes the electronic mechanical brake system under test according to the clamping instruction, and the electronic mechanical brake system under test includes multiple execution modules and front and rear axle control modules; the lower computer generates an analog signal according to the detection command, and sends the analog signal to the front and rear axle control module, so that the front and rear axle control module drives the multiple execution modules to control the wheel-side power module to simulate vehicle braking according to the analog signal; the lower computer receives the response data of the multiple execution modules in the test execution process collected by the signal acquisition module;

[0079] The braking response state of the tested electronic mechanical braking system during operation is analyzed according to the response data.

[0080] In some embodiments, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data includes:

[0081] Analyzing a response status of each of the plurality of execution modules according to the response data;

[0082] When the response states of the plurality of execution modules all meet the first preset standard, determining the response synchronization of all the execution modules;

[0083] When the response synchronization does not meet a second preset standard, the human-computer interaction module is controlled to display a first value.

[0084] In some embodiments, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data further includes:

[0085] Analyzing the PWM regulation characteristics of each of the plurality of execution modules according to the response data;

[0086] Determining PWM synchronization of the plurality of execution modules according to the PWM regulation characteristics;

[0087] When the PWM synchronization does not meet a third preset standard, the human-computer interaction module is controlled to display a second value.

[0088] The contents of the device embodiments of the present invention are all applicable to the method embodiments. The functions specifically implemented by the method embodiments are the same as those of the above-mentioned device embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned method.

[0089] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A test device for an electromechanical brake system, characterized in that: include: A clamping module, the clamping module is used to fix the electronic mechanical brake system under test according to the clamping instruction, the electronic mechanical brake system under test includes a plurality of execution modules and front and rear axle control modules; A wheel-side power module, wherein the wheel-side power module is used to simulate vehicle braking; A signal acquisition module, the signal acquisition module is used to collect response data of the multiple execution modules during the execution of the test process; A host computer, the host computer is used to start the response task according to a preset timing, and generate the clamping instruction and the detection command according to the response task; Analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer; A lower computer, the lower computer is used to receive the clamping instruction and the detection command sent by the upper computer; Sending the clamping instruction to the clamping module; Generate a simulation signal according to the detection command, and send the simulation signal to the front and rear axle control module, so that the front and rear axle control module drives the multiple execution modules to control the wheel-side power module to simulate vehicle braking according to the simulation signal; receive response data sent by the signal acquisition module, and send the response data to the host computer; Wherein, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer includes: Analyzing a response status of each of the plurality of execution modules according to the response data; When the response states of the plurality of execution modules all meet the first preset standard, determining the response synchronization of all the execution modules; When the response synchronization does not meet the second preset standard, controlling the human-computer interaction module to display the first value; Analyzing the PWM regulation characteristics of each of the plurality of execution modules according to the response data; Determining PWM synchronization of the plurality of execution modules according to the PWM regulation characteristics; When the PWM synchronization does not meet a third preset standard, the human-computer interaction module is controlled to display a second value.

2. The test device of an electronic mechanical brake system according to claim 1, characterized in that: Before analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer, the upper computer is further used to: Receiving the self-test signal of the front and rear axle control module sent by the lower computer; When it is determined according to the self-test signal that the front and rear axle control modules are faulty, a fault light lighting signal is generated.

3. The test device of an electronic mechanical brake system according to claim 2, characterized in that: Before analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data sent by the lower computer, the upper computer is further used to: When it is determined according to the self-test signal that the front and rear axle control modules do not have a fault, obtaining the motor current of the tested electronic mechanical brake system sent by the lower computer; When it is determined according to the motor current that the idling drag torque of the electronic mechanical brake system under test exceeds the torque setting value, the human-machine interaction module is controlled to display the motor torque value, where the motor torque value is calculated by the motor current.

4. The test device of an electronic mechanical brake system according to claim 1, characterized in that: The upper computer is also used to generate a system sensitivity test command and send the system sensitivity test command to the lower computer; the lower computer controls the front and rear axle control modules to generate braking signals of different intensities according to the system sensitivity test command.

5. The test device of an electronic mechanical brake system according to claim 1, characterized in that: The clamping module comprises a support and a fixing component, and the electronic mechanical brake system under test is fixed on the support via the fixing component.

6. A method for testing an electromechanical brake system, characterized in that: The method is applied to a host computer, and the method comprises: Initiate response tasks according to preset timing; Generate a clamping instruction and a detection command according to the response task; The clamping instruction and the detection command are sent to a lower computer; the lower computer sends the clamping instruction to a clamping module, so that the clamping module fixes the electronic mechanical brake system under test according to the clamping instruction, and the electronic mechanical brake system under test includes multiple execution modules and front and rear axle control modules; the lower computer generates an analog signal according to the detection command, and sends the analog signal to the front and rear axle control module, so that the front and rear axle control module drives the multiple execution modules to control the wheel-side power module to simulate vehicle braking according to the analog signal; the lower computer receives response data of the multiple execution modules in the test process collected by the signal acquisition module; analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data; Wherein, analyzing the braking response state of the tested electronic mechanical braking system during operation according to the response data includes: Analyzing a response status of each of the plurality of execution modules according to the response data; When the response states of the plurality of execution modules all meet the first preset standard, determining the response synchronization of all the execution modules; When the response synchronization does not meet the second preset standard, controlling the human-computer interaction module to display the first value; Analyzing the PWM regulation characteristics of each of the plurality of execution modules according to the response data; Determining PWM synchronization of the plurality of execution modules according to the PWM regulation characteristics; When the PWM synchronization does not meet a third preset standard, the human-computer interaction module is controlled to display a second value.

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