Commercial vehicle braking abnormal sound analysis method and device and electronic equipment

Abstract

The invention relates to a commercial vehicle braking abnormal sound analysis method and device and electronic equipment, and belongs to the technical field of automobile braking test.The method comprises the steps that the first vehicle speed and the first rotating speed before braking and first noise data in a cab are obtained; based on the first vehicle speed, the first rotating speed and the first noise data, the incidence relation of the vehicle speed, the rotating speed and the noise data in the vehicle speed gradually decreasing process after braking is started is built; and according to the incidence relation, the mechanism of abnormal braking is determined, and according to the mechanism of abnormal braking, the position of abnormal braking sound is determined. The method solves the technical problem that in the prior art, a method for checking brake parts one by one to solve the abnormal braking noise is not suitable for mechanical noise and aerodynamic noise caused by auxiliary braking.

Description

Technical Field

[0001] The invention relates to the technical field of automobile brake testing, and in particular to a method, a device and an electronic device for analyzing abnormal brake noise of a commercial vehicle. Background Art

[0002] Currently, commercial vehicles widely use disc or drum brakes, and are equipped with auxiliary brake devices such as engine brakes, exhaust brakes, and hydraulic retarders. In actual use, abnormal brake noises sometimes occur. This noise may mean that the brake system is in an abnormal working state and will also have a negative impact on the driving experience. There are many factors that cause abnormal brake noises, such as brake failures and motion interference during the braking process.

[0003] For this type of problem, the conventional test and analysis method is generally to check the brakes: 1. Check whether the friction pad is abnormally worn. 2. Deformation of the brake disc or brake drum. 3. Loose brake base plate or brake caliper. 4. Check for interference between the cab and chassis motion components. Usually, the inspection adopts subjective evaluation to determine the location of the abnormal noise, and then check whether the parts and assembly are consistent with the design status.

[0004] This method is not suitable for troubleshooting and analysis of all abnormal brake noise problems, especially mechanical noise and aerodynamic noise caused by auxiliary braking. Summary of the invention

[0005] In view of this, it is necessary to provide a commercial vehicle brake noise analysis method, device and electronic equipment to solve the technical problem that the method of solving brake noise by checking brake components one by one in the prior art is not suitable for mechanical noise and pneumatic noise caused by auxiliary braking.

[0006] In order to solve the above problems, the present invention provides a method for analyzing abnormal brake noise of a commercial vehicle, comprising: Acquiring a first vehicle speed, a first rotation speed, and first noise data in the cab before braking; Based on the first vehicle speed, the first rotation speed and the first noise data, constructing a correlation relationship between the vehicle speed, the rotation speed and the noise data during a process in which the vehicle speed gradually decreases after the braking is initiated; According to the association relationship, the mechanism of the braking abnormality is determined, and according to the mechanism of the braking abnormality, the location of the abnormal braking noise is determined.

[0007] In a possible implementation, the first vehicle speed is a preset maximum vehicle speed; and constructing, based on the first vehicle speed, the first rotation speed and the first noise data, a correlation relationship between the vehicle speed, the rotation speed and the noise data during a process in which the vehicle speed gradually decreases after the braking is started, includes: Taking the vehicle speed as a reference, a data set of rotation speed, noise and vehicle speed is obtained when the vehicle speed gradually decreases from a first vehicle speed to a stationary state.

[0008] In a possible implementation, the constructing of the correlation between the vehicle speed, the rotation speed and the noise data during the process of gradually decreasing the vehicle speed after the braking is initiated includes: Preprocessing the data set to obtain a target data set; According to the target data set, a curve graph of vehicle speed-rotation speed-noise changing with time is drawn, and the time point when the abnormal braking noise occurs is determined according to the curve graph; Perform Fourier transform on the noise data to obtain the noise spectrum; According to the intensity of noise at different frequencies, determine the relationship between noise frequency and vehicle speed and rotation speed; Based on the time point when the abnormal brake noise occurs, the frequency component of the noise is determined according to the relationship between the noise frequency and the vehicle speed and rotation speed.

[0009] In a possible implementation, determining the mechanism of the braking abnormality according to the association relationship, and determining the location of the braking abnormality according to the mechanism of the braking abnormality, includes: Determine the source of the abnormal noise based on the comparison between the frequency components of the noise and the frequency components under the preset normal state; According to the source of abnormal noise, determine the braking part where the abnormal noise is generated.

[0010] In a possible implementation, the brake start includes starting the service brake and the auxiliary start at the same time; and determining the source of the abnormal noise according to the comparison relationship between the frequency component of the noise and the frequency component under a preset normal state includes: When the service brake noise data is normal and the noise data after auxiliary brake intervention is abnormal, determine whether the retarder is involved in braking; If it participates, the working chamber pressure signal of the retarder body is obtained; The source of the abnormal noise is determined based on the correlation between the vehicle speed, rotation speed, brake status signal and working chamber pressure signal; the brake status signal is to turn on the retarder brake.

[0011] In a possible implementation, the brake start includes starting the service brake and the auxiliary start at the same time; and determining the source of the abnormal noise according to the comparison relationship between the frequency component of the noise and the frequency component under a preset normal state includes: The control variable method is adopted to open each brake component of the auxiliary brake one by one to determine the part of the auxiliary brake that causes abnormal noise.

[0012] In a possible implementation, the constructing of the correlation between the vehicle speed, the rotation speed and the noise data during the process of gradually decreasing the vehicle speed after the braking is initiated includes: A preset statistical method is used to determine the correlation between vehicle speed, rotation speed and noise data.

[0013] In a second aspect, the present invention further provides a commercial vehicle brake abnormal noise analysis device, comprising: An acquisition module, used for acquiring a first vehicle speed, a first rotation speed and first noise data in the cab before braking; A relationship determination module, for constructing a correlation relationship between the vehicle speed, the rotation speed and the noise data in a process where the vehicle speed gradually decreases after the braking is started, based on the first vehicle speed, the first rotation speed and the first noise data; The abnormality determination module is used to determine the mechanism of the braking abnormality according to the association relationship, and determine the location of the abnormal braking noise according to the mechanism of the braking abnormality.

[0014] In a third aspect, the present invention further provides an electronic device, comprising: a processor and a memory; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the steps in the commercial vehicle brake noise analysis method as described above are implemented.

[0015] In a fourth aspect, the present invention further provides a computer-readable storage medium storing one or more programs, wherein the one or more programs can be executed by one or more processors to implement the steps in the commercial vehicle brake noise analysis method as described above.

[0016] The beneficial effects of the present invention are as follows: firstly, the first vehicle speed, the first rotation speed and the first noise data in the cab before braking are obtained; then, based on the first vehicle speed, the first rotation speed and the first noise data, the correlation between the vehicle speed, the rotation speed and the noise data in the process of gradually reducing the vehicle speed after the braking is started is constructed; thereby, the relationship between the vehicle speed, the rotation speed and the noise after the various braking components are started is determined, and through this correlation, the dynamic changes in the braking process can be systematically analyzed, and the mechanism of the braking abnormality is determined according to the correlation, and the location of the abnormal braking noise is determined according to the mechanism of the braking abnormality. Through the correlation between the vehicle speed, the rotation speed and the noise, the location of the abnormal noise is quantitatively identified, the accuracy and reliability of the identification are improved, and the error of subjective judgment is avoided. According to the correlation, the mechanism of the braking abnormality can be accurately determined, and the specific location of the abnormal braking noise can be further determined. This provides a clear basis for the diagnosis and repair of faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A method flow chart of an embodiment of a method for analyzing abnormal brake noise of a commercial vehicle provided by the present invention; Figure 2 A method flow chart of an embodiment of step S101 in the commercial vehicle brake abnormal noise analysis method provided by the present invention; Figure 3A schematic diagram of the time-frequency domain noise signal of each measuring point in the commercial vehicle brake abnormal noise analysis method provided by the present invention; Figure 4 A schematic diagram of the time domain noise sound pressure level signal of the measuring point in the commercial vehicle brake abnormal noise analysis method provided by the present invention; Figure 5 It is a schematic diagram of an embodiment of a commercial vehicle brake abnormal noise analysis device provided by the present invention; Figure 6 It is a schematic diagram of the operating environment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0019] A specific embodiment of the present invention discloses a method for analyzing abnormal brake noise of a commercial vehicle. Figure 1 ,include: S101, obtaining a first vehicle speed, a first rotation speed, and first noise data in the cab before braking; S102, constructing a correlation relationship between the vehicle speed, the rotation speed and the noise data in a process in which the vehicle speed gradually decreases after the braking is initiated, based on the first vehicle speed, the first rotation speed and the first noise data; S103: Determine a mechanism of the abnormal braking according to the association relationship, and determine a location of the abnormal braking noise according to the mechanism of the abnormal braking.

[0020] In this embodiment, the first vehicle speed, the first rotation speed and the first noise data in the cab before braking are first obtained; then, based on the first vehicle speed, the first rotation speed and the first noise data, the correlation between the vehicle speed, the rotation speed and the noise data in the process of gradually reducing the vehicle speed after the braking is started is constructed; thereby determining the relationship between the vehicle speed, the rotation speed and the noise after starting various braking components. Through this correlation, the dynamic changes in the braking process can be systematically analyzed, and the mechanism of the braking abnormality can be determined according to the correlation, and the location of the abnormal braking noise can be determined according to the mechanism of the braking abnormality. Through the correlation between the vehicle speed, the rotation speed and the noise, the location of the abnormal noise is quantitatively identified, which improves the accuracy and reliability of the identification and avoids the error of subjective judgment. According to the correlation, the mechanism of the braking abnormality can be accurately determined, and the specific location of the abnormal braking noise can be further determined. This provides a clear basis for the diagnosis and repair of faults.

[0021] It should be noted that the first vehicle speed can be the pre-braking speed when there is no braking in any time period, and the size of the vehicle speed is not limited. The first speed and the first noise data in the cab are the speed and noise data corresponding to the first vehicle speed at the same time. In this embodiment, the first vehicle speed is the maximum speed set for the vehicle before braking begins. Starting from the maximum speed of the vehicle, the full data set of speed, noise and vehicle speed is obtained during the process of the vehicle speed gradually decreasing from the first speed to a stationary state, thereby obtaining more comprehensive and accurate noise data.

[0022] In a specific embodiment, before obtaining the vehicle speed, rotation speed and noise data, a sensor is installed at a point to be tested. The parts that may cause abnormal braking noise include engine braking, exhaust braking, retarder, and wheel brake.

[0023] The steps for selecting test points to install test sensors include: 1. Install a sensor for testing the driver's near-ear noise next to the driver's seat in the cab, with the sensor head facing the driver's ear; 2. Install a sensor for testing the driver's near-ear noise next to the passenger seat in the cab, with the sensor head facing the passenger's ear; 3. A sensor in the middle of the cylinder head on top of the engine for testing engine brake noise; 4. Install a sensor on the side of the retarder to test the retarder noise; 5. Install a sensor for testing the near-field noise of the wheel-side brake on the bridge, and point the sensor head toward the brake; 6. Install the oil pressure sensor in the hydraulic retarder oil chamber.

[0024] After the vehicle speed reaches the maximum speed, release the accelerator to turn on the service brake and auxiliary brake in sequence, and record the vehicle speed, rotation speed and cab noise data in the original vehicle state, service brake state and auxiliary brake state respectively. Comprehensively analyze the test data to determine the relationship between noise, rotation speed, vehicle speed and cab acceleration when abnormal braking noise occurs, and determine the mechanism that causes abnormal braking noise.

[0025] In some embodiments, the relationship between the vehicle speed, rotation speed and noise data during the process of gradually reducing the vehicle speed after the brake is started is constructed, see Figure 2 ,include: S201, preprocessing the data set to obtain a target data set; S202, drawing a curve graph of vehicle speed-rotation speed-noise changes over time according to the target data set, and determining the time point when the abnormal braking noise occurs according to the curve graph; S203, performing Fourier transform on the noise data to obtain a noise spectrum diagram; S204, determining the relationship between the noise frequency and the vehicle speed and rotation speed according to the intensity of the noise at different frequencies; S205: Based on the time point when the abnormal braking noise occurs, determine the frequency component of the noise according to the relationship between the noise frequency and the vehicle speed and rotation speed.

[0026] In this embodiment, the collected data is de-noised and smoothed to reduce the impact of noise on the analysis results and ensure the synchronization and consistency of the data. The changing trends of the vehicle speed, rotation speed and noise data on the time axis are observed, and their synchronous changes over time are analyzed. The noise data is converted to the frequency domain through Fourier transform, and the relationship between the frequency components of the noise and the vehicle speed and rotation speed is analyzed. Finally, statistical methods such as regression analysis and correlation analysis are used to establish a mathematical model or functional relationship between the vehicle speed, rotation speed and noise data, which helps to understand and predict the changes in noise at different vehicle speeds and rotation speeds, thereby providing a basis for the design and optimization of the braking system.

[0027] In some embodiments, determining the mechanism of the braking abnormality according to the association relationship, and determining the location of the abnormal braking noise according to the mechanism of the braking abnormality, includes: Determine the source of the abnormal noise based on the comparison between the frequency components of the noise and the frequency components under the preset normal state; According to the source of abnormal noise, determine the braking part where the abnormal noise is generated.

[0028] In this embodiment, the noise contribution of different locations when abnormal braking noise is generated is determined by comprehensive analysis of test data, wherein the contribution is determined by comparing with the noise signal under normal conditions.

[0029] In some embodiments, the brake start includes starting the service brake and the auxiliary start at the same time; the determining the source of the abnormal noise according to the comparison relationship between the frequency component of the noise and the frequency component under the preset normal state includes: When the service brake noise data is normal and the noise data after auxiliary brake intervention is abnormal, determine whether the retarder is involved in braking; If it participates, the working chamber pressure signal of the retarder body is obtained; The source of the abnormal noise is determined based on the correlation between the vehicle speed, rotation speed, brake status signal and working chamber pressure signal; the brake status signal is to turn on the retarder brake.

[0030] In this embodiment, the vehicle is started, the service brakes are normal, and there is an abnormal noise after the auxiliary brake intervenes. It is now necessary to test the working chamber pressure of the hydraulic retarder body and test the near-field noise at different locations (sampling frequency 24000Hz). The vehicle speed decreases from the maximum value at intervals of 10km / h (89→0km / h), and the retarder works in a fixed gear (A, 1, 2, 3 gears) respectively. The synchronous engine brake intervenes according to the braking demand. The acquisition equipment obtains the test data collected by the test sensor at different braking states, where the test data includes vehicle speed signal, rotation speed signal, brake status signal, oil pressure sensor signal, and noise sensor signal of each measuring point; multiple sets of test data are obtained through multiple cycle tests. Finally, the test data is comprehensively analyzed to determine the noise contribution of different locations when the abnormal braking noise occurs, the relationship between the retarder oil pressure signal and the noise, and the cause of the abnormal braking noise phenomenon is determined, such as Figure 3 shown.

[0031] In some embodiments, the brake start includes starting the service brake and the auxiliary start at the same time; the determining the source of the abnormal noise according to the comparison relationship between the frequency component of the noise and the frequency component under the preset normal state includes: The control variable method is adopted to open each brake component of the auxiliary brake one by one to determine the part of the auxiliary brake that causes abnormal noise.

[0032] In this embodiment, after the auxiliary brake A gear is turned on, the retarder is turned on first. When the retarder cannot meet the braking demand, the engine brake begins to intervene. After the vehicle speed drops to the target speed, the engine brake exits first. From the analysis of the time-frequency domain results, the near-field noise of the retarder is relatively stable. As the vehicle speed increases, the engine brake begins to intervene. The noise decreases with the reduction of the retarder load. The main contribution comes from the high-frequency pneumatic noise generated by the exhaust valve after the engine brake is turned on and the brake rocker arm pushes open. In the cab, the overall noise is small and mainly in the middle and low frequencies, and the high-frequency energy is not obvious. After exiting the brake A gear, the sound disappears. The top noise increases significantly after the engine brake intervenes (producing abnormal noise) at 5000Hz-15000Hz. From the analysis of the sound pressure level data, after the brake A gear is turned on, the near-field noise of the retarder increases by about 3dB (A) after the engine brake intervenes, and the top of the engine increases by about 1dB (A) after the engine brake intervenes. The cab noise increases slightly (<1dB (A)). (2) After the auxiliary brake is turned on in the third gear, the engine brake starts to work first, and the retarder intervenes according to the braking demand. When the third gear is turned on and the phantom brake works normally, the noise energy of the retarder near field and the top of the engine at 5000Hz-15000Hz increases significantly. After exiting the third gear, the high-frequency energy decreases significantly. When the third gear is turned on, the overall noise in the cab is relatively small, and the high-frequency energy is not obvious. The near-field noise of the retarder increases by about 9dB (A), and the top of the engine increases by about 4dB (A). The noise in the cab increases slightly (<1dB (A)); when the third gear is turned on and the shielding liquid retarder works, the noise energy of the top of the engine at 5000Hz-15000Hz increases significantly. After exiting the third gear, the high-frequency energy decreases significantly. The overall noise in the cab is relatively small (compared to the outside of the car), and the high-frequency energy is not obvious. The near-field noise of the retarder increases by about 4dB (A), and the top of the engine increases by about 3dB (A). The noise value in the cab does not change much. In summary, the abnormal noise in this embodiment is caused by the high-frequency aerodynamic noise generated when the engine brakes. Further, the fault mechanism is improved and optimized. By executing the above test and collection actions, the collected signal data such as noise, oil pressure, braking, vehicle speed and rotation speed are comprehensively analyzed ( Figure 3 , 4 ). By using the Fourier transform analysis method, the near-field noise of the engine, hydraulic retarder, and wheel end is compared to determine the main sound source. If the engine noise value contributes more during braking, the abnormal noise comes from the abnormal working state of the engine; if the retarder noise contributes more during braking, the abnormal noise comes from the abnormal working state of the retarder. Similar abnormal noises can be checked using this test method and system.

[0033] Based on the above commercial vehicle brake abnormal noise analysis method, the embodiment of the present invention also provides a commercial vehicle brake abnormal noise analysis device, please refer to Figure 5 ,include: An acquisition module 510 is used to acquire a first vehicle speed, a first rotation speed, and first noise data in the cab before braking; A relationship determination module 520, configured to construct a correlation relationship between the vehicle speed, the rotation speed and the noise data in a process where the vehicle speed gradually decreases after the braking is initiated, based on the first vehicle speed, the first rotation speed and the first noise data; The abnormality determination module 530 is used to determine the mechanism of the braking abnormality according to the association relationship, and determine the location of the abnormal braking noise according to the mechanism of the braking abnormality.

[0034] like Figure 6 As shown, based on the above commercial vehicle brake noise analysis method, the present invention also provides an electronic device, which can be a computing electronic device such as a mobile terminal, a desktop computer, a notebook, a palm computer, and a server. The electronic device includes a processor 610, a memory 620, and a display 630. Figure 6 Only some components of the electronic device are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0035] In some embodiments, the memory 620 may be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device. In other embodiments, the memory 620 may also be an external storage electronic device of the electronic device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Further, the memory 620 may also include both an internal storage unit of the electronic device and an external storage electronic device. The memory 620 is used to store application software and various types of data installed in the electronic device, such as program codes installed in the electronic device. The memory 620 may also be used to temporarily store data that has been output or is to be output. In one embodiment, a commercial vehicle brake abnormal noise analysis program 640 is stored on the memory 620, and the commercial vehicle brake abnormal noise analysis program 640 can be executed by the processor 610, thereby realizing the commercial vehicle brake abnormal noise analysis method of each embodiment of the present application.

[0036] In some embodiments, the processor 610 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 620, such as executing a commercial vehicle brake noise analysis method.

[0037] In some embodiments, the display 630 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 630 is used to display information on the commercial vehicle brake noise analysis electronic device and to display a visual user interface. The components 610-630 of the electronic device communicate with each other via a system bus.

[0038] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for analyzing abnormal brake noise of a commercial vehicle, characterized in that: include: Acquiring a first vehicle speed, a first rotation speed, and first noise data in the cab before braking; Based on the first vehicle speed, the first rotation speed and the first noise data, constructing a correlation relationship between the vehicle speed, the rotation speed and the noise data during a process in which the vehicle speed gradually decreases after the braking is initiated; According to the association relationship, the mechanism of the braking abnormality is determined, and according to the mechanism of the braking abnormality, the location of the abnormal braking noise is determined.

2. The commercial vehicle brake noise analysis method according to claim 1, characterized in that: The first vehicle speed is a preset maximum vehicle speed; the construction of the correlation relationship between the vehicle speed, the rotation speed and the noise data during the process of gradually decreasing the vehicle speed after the braking is started based on the first vehicle speed, the first rotation speed and the first noise data includes: Taking the vehicle speed as a reference, a data set of rotation speed, noise and vehicle speed is obtained when the vehicle speed gradually decreases from a first vehicle speed to a stationary state.

3. The commercial vehicle brake noise analysis method according to claim 2, characterized in that: The constructing of the correlation between the vehicle speed, the rotation speed and the noise data during the process of the vehicle speed gradually decreasing after the braking is started includes: Preprocessing the data set to obtain a target data set; According to the target data set, a curve graph of vehicle speed-rotation speed-noise changing with time is drawn, and the time point when the abnormal braking noise occurs is determined according to the curve graph; Perform Fourier transform on the noise data to obtain the noise spectrum; Determine the relationship between noise frequency and vehicle speed and rotation speed based on the intensity of noise at different frequencies; Based on the time point when the abnormal brake noise occurs, the frequency component of the noise is determined according to the relationship between the noise frequency and the vehicle speed and rotation speed.

4. The commercial vehicle brake noise analysis method according to claim 3, characterized in that: Determining the mechanism of the braking abnormality according to the association relationship, and determining the location of the abnormal braking noise according to the mechanism of the braking abnormality, includes: Determine the source of the abnormal noise based on the comparison between the frequency components of the noise and the frequency components under the preset normal state; According to the source of abnormal noise, determine the braking part where the abnormal noise is generated.

5. The commercial vehicle brake noise analysis method according to claim 4, characterized in that: The brake start includes starting the service brake and the auxiliary start at the same time; the source of the abnormal noise is determined according to the comparison relationship between the frequency component of the noise and the frequency component under the preset normal state, including: When the service brake noise data is normal and the noise data after auxiliary brake intervention is abnormal, determine whether the retarder is involved in braking; If it participates, the working chamber pressure signal of the retarder body is obtained; The source of the abnormal noise is determined based on the correlation between the vehicle speed, rotation speed, brake status signal and working chamber pressure signal; the brake status signal is to turn on the retarder brake.

6. The commercial vehicle brake noise analysis method according to claim 4, characterized in that: The brake start includes starting the service brake and the auxiliary start at the same time; the source of the abnormal noise is determined according to the comparison relationship between the frequency component of the noise and the frequency component under the preset normal state, including: The control variable method is adopted to open each brake component of the auxiliary brake one by one to determine the part of the auxiliary brake that causes abnormal noise.

7. The commercial vehicle brake noise analysis method according to claim 1, characterized in that: The constructing of the correlation between the vehicle speed, the rotation speed and the noise data during the process of the vehicle speed gradually decreasing after the braking is started includes: A preset statistical method is used to determine the correlation between vehicle speed, rotation speed and noise data.

8. A commercial vehicle brake noise analysis device, characterized in that: include: An acquisition module, used for acquiring a first vehicle speed, a first rotation speed and first noise data in the cab before braking; A relationship determination module, for constructing a correlation relationship between the vehicle speed, the rotation speed and the noise data in a process where the vehicle speed gradually decreases after the braking is started, based on the first vehicle speed, the first rotation speed and the first noise data; The abnormality determination module is used to determine the mechanism of the braking abnormality according to the association relationship, and determine the location of the abnormal braking noise according to the mechanism of the braking abnormality.

9. An electronic device, characterized in that: include: Processor and memory; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the steps in the commercial vehicle brake noise analysis method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the commercial vehicle brake noise analysis method according to any one of claims 1 to 7.

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