In-vehicle noise testing device

Abstract

The invention relates to an in-vehicle noise testing device, and relates to the technical field of noise testing, the in-vehicle noise testing device comprises a testing block, a processor and a support, the testing block is provided with a microphone array in signal connection with the processor, the microphone array is composed of a plurality of microphones and is used for collecting in-vehicle noise, and the support is used for installing the testing block in a vehicle. The processor is used for receiving and processing sound signals of the microphone array, the processor is provided with a sound imaging module, a spectrum analysis module and a data storage module, and the sound imaging module is used for carrying out imaging analysis on sound data collected by the microphone array; the spectrum analysis module is used for analyzing frequency and amplitude distribution of sound collected by the microphone array, and the data storage module is used for storing test data. The method and the device have the effect of improving the comprehensiveness of the in-vehicle noise test.

Description

Technical Field

[0001] This invention relates to the field of noise testing technology, and in particular to an in-vehicle noise testing device. Background Technology

[0002] As a common means of transportation, car interior noise directly affects the driving experience and comfort. Its sources are complex (engine vibration, chassis noise, wind noise, electronic equipment operating noise, etc.), and the small interior space and special acoustic environment of the car result in obvious noise reflection, which poses a challenge to accurate positioning and analysis.

[0003] Common in-vehicle noise testing devices often rely on a single sensor for data collection, that is, they collect in-vehicle noise through a single microphone. They can only obtain the noise decibel value, cannot intuitively show the location of the noise source, lack analysis functions, and have difficulty distinguishing the degree of impact of different types of noise. Therefore, the testing of in-vehicle noise is not comprehensive enough. Summary of the Invention

[0004] To improve the comprehensiveness of in-vehicle noise testing, this application provides an in-vehicle noise testing device.

[0005] The in-vehicle noise testing device provided in this application adopts the following technical solution: An in-vehicle noise testing device includes a test block, a processor, and a bracket. The test block is equipped with a microphone array connected to the processor. The microphone array consists of multiple microphones and is used to collect in-vehicle noise. The bracket is used to mount the test block inside the vehicle. The processor is used to receive and process the sound signals from the microphone array. The processor is equipped with an acoustic imaging module, a spectrum analysis module, and a data storage module. The acoustic imaging module is used to perform imaging analysis on the sound data collected by the microphone array. The spectrum analysis module is used to analyze the frequency and amplitude distribution of the sound collected by the microphone array. The data storage module is used to save the test data.

[0006] By adopting the above technical solution, the test block is installed in the vehicle using a bracket to provide a stable collection environment for the microphone array. The microphone array consists of multiple high-sensitivity microphones, which collect in-vehicle noise data and transmit it to the processor. The processor receives the noise signal from the microphone array and converts it into acoustic image data using beamforming technology. It also supports multi-frequency filtering processing to separate different types of noise signals. The processor's acoustic imaging module converts the noise signal into a color acoustic image, visually presenting the location of the noise source. The processor's spectrum analysis module displays the amplitude distribution of noise at different frequencies, distinguishing noise types. The processor's data storage module saves the test data in a standardized format, supports screenshots and audio / video export, and can independently display noise data from different locations in the vehicle, such as the front and rear seats and the dashboard area, facilitating comparative analysis. Through multiple functional tests, the comprehensiveness of in-vehicle noise testing is improved.

[0007] Preferably, the test block is equipped with a camera and a lighting unit, both of which are connected to the processor. The camera is used for image capture, the lighting unit is used for providing light, and the processor is used to combine the camera image with the sound imaging module to output a sound imaging image and an actual picture. The processor is used to activate the lighting unit when conducting the test.

[0008] By adopting the above technical solution, the camera is used to take pictures for use in conjunction with the sound imaging module when outputting images, so as to improve the reference value of the sound imaging pictures and facilitate the identification of the location and source of noise inside the vehicle. At the same time, the light unit is used to provide photos to improve the clarity of the pictures taken by the camera so as to distinguish them for use.

[0009] Preferably, the test block is provided with a waterproof and dustproof membrane, which is used to enhance the waterproof and dustproof performance of the microphone array, camera and lighting unit.

[0010] By adopting the above technical solution, the waterproof and dustproof membrane integrates waterproof and dustproof properties, resists electromagnetic interference and vibration in the vehicle, and provides waterproof and dustproof performance for microphone arrays, cameras and lighting units while resisting electromagnetic interference and vibration in the vehicle, thus improving the accuracy of test results.

[0011] Preferably, the bracket includes an adsorption base, a telescopic rod, and a fixing frame. The adsorption base is detachably mounted on the vehicle interior structure. One end of the telescopic rod is rotatably connected to the adsorption base, and the other end of the telescopic rod is rotatably connected to the fixing frame. The fixing frame is provided with an assembly component for assembling the test block onto the fixing frame.

[0012] By adopting the above technical solution, the adsorption base is used to fix it in different positions such as seats, dashboards or doors in the car. The telescopic rod is used to adjust the rotation angle to extend and retract the length, so as to adjust the position and orientation of the test block, making it convenient for the test block to be aligned with various positions in the car for testing. The fixing frame assembles the test block through assembly components, which is convenient for disassembly and installation, improving the convenience of use.

[0013] Preferably, the assembly assembly includes an assembly bolt, an assembly gear, an assembly rack, and an assembly locking block. The assembly gear is rotatably disposed within the fixed frame, the assembly rack is slidably disposed on the fixed frame and meshes with the assembly gear, the assembly bolt is rotatably disposed on the fixed frame and threadedly connected to the fixed frame, the assembly bolt is connected to the assembly gear, and the assembly locking block is connected to the assembly rack and used to lock and fix the test block.

[0014] By adopting the above technical solution, the test block is attached to the fixed frame and the assembly bolts are rotated and tightened to drive the assembly gear to rotate. The meshing of the gears causes the assembly rack to move so that the assembly block approaches and locks the test block, thereby completing the assembly. The operation is simple and convenient, and it is easy to install and remove the test block, thus making it convenient to use.

[0015] Preferably, the assembled rack is provided with a locking slot and a locking auxiliary slot. A locking block is slidably disposed in the locking slot. A first locking spring is provided in the locking slot to connect the inner wall of the locking slot and the locking block. The locking block can be inserted into the locking auxiliary slot of another assembled rack. A locking abutment groove is provided in the inner wall of the locking auxiliary slot. A locking abutment block is slidably disposed in the locking abutment groove. A second locking spring is provided in the locking abutment groove to connect the inner wall of the locking abutment groove and the locking abutment block. The side walls of the locking abutment block and the locking block are both inclined and can abut against each other. The elasticity of the first locking spring is greater than that of the second locking spring.

[0016] By adopting the above technical solution, when assembling the test block, the assembly rack moves during the assembly process, causing the locking block on the assembly rack to insert into the locking auxiliary groove of another assembly rack. Simultaneously, the locking auxiliary groove on the assembly rack allows locking blocks from other assembly racks to insert. During this process, the locking block abuts against the locking stop, causing the locking stop to move and compress the second locking spring, thereby locking the assembly rack for limitation. At this time, adjacent assembly racks are mutually limited, improving the stability of the test block assembly. When disassembly is required, the assembly bolts need to be loosened, and a certain force needs to be applied to cooperate with the return of the second locking spring. As the assembly rack returns to its original position, it pushes the locking block to move and compresses the first locking spring, causing the locking block to disengage from the locking auxiliary groove, completing the disassembly. Applying a certain force during this process reduces the probability of accidental contact with the assembly causing the test block to fall and be damaged, thus improving the stability of use.

[0017] Preferably, the test block is provided with an assembly hole for inserting an assembly bolt, and the assembly bolt is threaded to the inner wall of the assembly hole.

[0018] By adopting the above technical solution, the assembly bolt is inserted into the assembly hole and threaded to the inner wall of the assembly hole during assembly, thereby further improving the stability of the assembly. At the same time, the test block is positioned to determine the position of the test block during assembly, reducing the impact of the test block's skewing and offset on the noise test and improving the accuracy of the test.

[0019] Preferably, the test block is detachably equipped with a touch screen, which is connected to the processor signal and is used to display test images and data and to perform operations.

[0020] By adopting the above technical solution, the touch screen displays the output test image on the one hand, and provides a visual operation entry point on the other hand, allowing users to set test parameters (frequency range, sampling time, zoom mode). This enables the touch screen to display acoustic images, spectrum graphs, and noise amplitude data in real time, while also supporting specific operations such as manually marking key noise areas, thus improving the convenience and functionality of use and enhancing the comprehensiveness of in-vehicle noise testing.

[0021] Preferably, the processor is provided with a wireless transmission module, which is used to transmit the data stored in the processor to an external device.

[0022] By adopting the above technical solution, the wireless transmission module eliminates the need for data transmission cables in the testing device, simplifying in-vehicle wiring and solving the problem of inconvenient wiring. Furthermore, it supports wireless connection with mobile phones or PCs, enabling real-time synchronization of test data and facilitating collaborative analysis among multiple users, further enhancing ease of use.

[0023] Preferably, the test block is detachably equipped with a battery module electrically connected to the processor, the battery module being used to power the processor.

[0024] By adopting the above technical solution, the battery module provides portable power for the entire device, avoiding the limitations of in-vehicle wiring. A single charge can meet several hours of continuous testing, adapting to mobile testing scenarios and improving the convenience of testing.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a test block, processor, bracket, microphone array, acoustic imaging module, spectrum analysis module, and data storage module, the test block is installed inside the vehicle via the bracket. The microphone array collects noise data inside the vehicle. The processor receives the noise signal from the microphone array. The processor's acoustic imaging module converts the noise signal into a color acoustic image, visually presenting the location of the noise source. The processor's spectrum analysis module displays the amplitude distribution of noise at different frequencies, distinguishing noise types. The processor's data storage module saves the test data in a standardized format, supports screenshots and audio / video export, and can independently display noise data from different locations inside the vehicle, such as the front row, rear row, and dashboard area, facilitating comparative analysis. Through multiple functional tests, the comprehensiveness of in-vehicle noise testing is improved. 2. By setting up a camera, lighting unit, and waterproof and dustproof diaphragm, the camera is used to capture pictures for use in conjunction with the output images of the acoustic imaging module, thereby improving the reference value of the acoustic imaging pictures. At the same time, the lighting unit is used to provide photos to improve the clarity of the pictures captured by the camera for easy identification and use. The waterproof and dustproof diaphragm integrates waterproof and dustproof properties, resists the effects of electromagnetic interference and vibration inside the vehicle, and provides waterproof and dustproof performance for the microphone array, camera, and lighting unit while resisting the effects of electromagnetic interference and vibration inside the vehicle, thereby improving the accuracy of test results. 3. By setting up an adsorption base, telescopic rod, fixed frame, assembly bolts, assembly gears, assembly racks, and assembly locking blocks, the telescopic rod connects the adsorption base and the fixed frame for adjusting the distance and angle. At the same time, the test block is attached to the fixed frame and the assembly bolts are rotated and tightened, which drives the assembly gears to rotate. The assembly gears mesh with the assembly racks, causing each assembly rack to move synchronously so that the assembly locking blocks approach and lock the test block, thus locking the test block onto the fixed frame to complete the assembly. The operation is simple and convenient, facilitating the installation and removal of the test block, and thus making it easy to use. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of an in-vehicle noise testing device provided in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram used to illustrate the support structure.

[0028] Figure 3 This is a schematic diagram used to illustrate the internal structure of the mounting frame.

[0029] Figure 4 It is a cross-sectional schematic diagram used to illustrate the structural relationship between the assembled racks.

[0030] Figure 5 This is a control block diagram of an in-vehicle noise testing device provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Support; 11. Adsorption base; 12. Telescopic rod; 13. Fixing frame; 2. Test block; 21. Microphone array; 22. Camera; 23. Lighting unit; 3. Processor; 31. Acoustic imaging module; 32. Spectrum analysis module; 33. Data storage module; 34. Wireless transmission module; 35. Battery module; 36. Touch screen; 4. Assembly components; 41. Assembly bolt; 42. Assembly gear; 43. Assembly rack; 44. Assembly block; 5. Locking block; 51. Locking slot; 52. First locking spring; 53. Locking stop block; 531. Locking stop groove; 532. Second locking spring; 54. Locking auxiliary groove. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5This application will be described in further detail.

[0033] This application discloses an in-vehicle noise testing device. (Refer to...) Figure 1 and Figure 5 The system comprises a test block 2, a processor 3, and a support 1. The test block 2 is circular in shape and has a microphone array 21 connected to the processor 3 on one side. The microphone array 21 consists of multiple layers of high-sensitivity microphones arranged in a circular pattern, capable of capturing noise signals in the 100Hz-100kHz frequency range, providing raw data for noise localization and analysis. The support 1 is used to mount the test block 2 inside the vehicle. The processor 3 is located inside the test block 2 and is used to receive and process the sound signals from the microphone array 21, converting them into acoustic image data using beamforming technology. It also supports multi-frequency filtering to separate different types of noise signals. The processor 3 software analysis system includes an acoustic imaging module 31, a spectrum analysis module 32, and a data storage module 33. The acoustic imaging module 31 is used to perform imaging analysis on the sound data collected by the microphone array 21, the spectrum analysis module 32 is used to analyze the frequency and amplitude distribution of the sound collected by the microphone array 21, and the data storage module 33 is used to save the test data. By setting up multiple functional modules to test various parameters of noise, the comprehensiveness of the test is improved.

[0034] To improve the accuracy of test results, refer to Figure 1 Test block 2 has a camera 22 at its center for capturing images, surrounded by a ring of lighting units 23 to provide illumination. Both the camera 22 and the lighting units 23 are connected to the processor 3. The processor 3 combines the image from the camera 22 with the acoustic imaging module 31 to output an acoustic imaging image and the actual picture. The processor 3 also activates the lighting units 23 during testing. Test block 2 has a waterproof and dustproof membrane (not shown in detail in the figure) on its surface. This membrane enhances the waterproof and dustproof performance of the microphone array 21, camera 22, and lighting units 23, while also resisting electromagnetic interference and vibration within the vehicle, thus improving the accuracy of the test results.

[0035] For ease of use, please refer to Figure 2 and Figure 3The bracket 1 includes an adsorption base 11, a telescopic rod 12, and a fixing frame 13. The adsorption base 11 can be magnetically fixed to different positions such as car seats, dashboards, or doors using built-in magnets. The telescopic rod 12 has a multi-section structure, with both ends rotatably connected to the adsorption base 11 and the fixing frame 13, respectively, and a damping structure is provided to maintain stability. The fixing frame 13 is provided with an assembly component 4, which is used to assemble the test block 2 onto the fixing frame 13. The assembly component 4 includes an assembly bolt 41, an assembly gear 42, four assembly racks 43, and four assembly latches 44. The assembly bolt 41 passes through the fixing frame 13 and is threadedly connected to the fixing frame 13 (the thread is not shown in detail in the figure). The assembly gear 42 is rotatably disposed within the fixing frame 13 and is fixedly connected to the assembly bolt 41. At the same time, the assembly gear 42 can move back and forth within the inner cavity of the fixing frame 13. Assembly racks 43 are evenly distributed around assembly gears 42 and mesh with them. Assembly racks 43 are slidably connected to the mounting bracket 13. One end of an assembly block 44 is fixedly connected to the assembly rack 43, and the other end is used to hold the test block 2. The test block 2 has an assembly hole at its center on the side furthest from the microphone array 21, into which an assembly bolt 41 is inserted. The assembly bolt 41 is threaded into the inner wall of the assembly hole. When assembling the test block 2, the test block 2 is placed on the mounting bracket 13, and the assembly bolt 41 is rotated and tightened, causing the assembly gears 42 to rotate. This meshing causes the assembly racks 43 to move, allowing the assembly block 44 to approach and hold the test block 2, thus completing the assembly. The operation is simple and convenient.

[0036] To improve stability during use, refer to Figure 3 and Figure 4The assembly rack 43 has a locking groove 51 at the end away from the assembly block 44. A locking block 5 is slidably disposed in the locking groove 51. A first locking spring 52 is disposed in the locking groove 51, connecting the inner wall of the locking groove 51 and the locking block 5. A locking auxiliary groove 54 is disposed through the center of the assembly gear 42, for the insertion of the locking block 5 of another assembly rack 43. A locking abutment groove 531 is disposed on the inner wall of the locking auxiliary groove 54. A locking abutment 53 is slidably disposed in the locking abutment groove 531, inserted into the locking auxiliary groove 54. A second locking spring 532 is disposed in the locking abutment groove 531, connecting the inner wall of the locking abutment groove 531 and the locking abutment 53. The side walls of the locking abutment 53 and the locking block 5 are both inclined and can abut against each other. The elasticity of the first locking spring 52 is greater than that of the second locking spring 532. During assembly, as the assembly rack 43 moves, the locking block 5 on the rack 43 inserts into the locking auxiliary groove 54 of another rack 43 until it is stopped by the connecting rod of the assembly block 44 connected to the rack 43. At the same time, the locking auxiliary groove 54 on the rack 43 allows the locking block 5 of the other rack 43 to be inserted. Simultaneously, the locking block 5 abuts against the locking stop 53 and pushes the locking stop 53 to move and compress the second locking spring 532. At this time, the adjacent racks 43 limit each other to improve the stability of the test block 2 assembly. When disassembly is required, the assembly bolt 41 needs to be loosened. The second locking spring 532 returns to its original position. As the rack 43 moves back to its original position, it pushes the locking block 5 to move and compresses the first locking spring 52, thereby causing the locking block 5 to disengage from the locking auxiliary groove 54 and completing the disassembly. During this process, a certain force needs to be applied to reduce the probability of the test block 2 falling and being damaged due to accidental contact with the assembly, thus improving the stability of use.

[0037] For ease of use, please refer to Figure 1 and Figure 5 The back of test block 2 is detachably equipped with a touchscreen 36 connected to processor 3 via assembly holes. The touchscreen 36 displays test images and data, and allows users to set test parameters and operate the processor 3 system via buttons on the screen. Items without sound are black, while sound sources are yellow / red; the louder the sound, the more vibrant the color. Processor 3 is equipped with a wireless transmission module 34, which transmits data stored in processor 3 to an external mobile phone or PC for real-time synchronization of test data. Test block 2 is also detachably equipped with a battery module 35 electrically connected to processor 3. The battery module 35 provides portable power to the entire device, avoiding the limitations of in-vehicle wiring. A single charge allows for more than 4 hours of continuous testing, adapting to mobile testing scenarios. In other embodiments, test block 2 is also equipped with an Ethernet port or USB port for data transmission via a data cable. Wireless transmission is convenient in situations where in-vehicle space is limited and wiring is restricted.

[0038] The implementation principle of the in-vehicle noise testing device in this embodiment is as follows: The bracket 1 is fixed at the target test position inside the vehicle, and the angle of the microphone array 21 is adjusted to ensure it is aligned with the suspected noise area. The device is turned on, and a dedicated configuration file for in-vehicle noise testing is selected via the touchscreen 36. After the test is started, the microphone array 21 captures the in-vehicle noise signal, the processor 3 generates an acoustic image using beamforming technology, the spectrum analysis module 32 simultaneously analyzes the amplitude data of noise at different frequencies, and the touchscreen 36 independently displays noise information (sound pressure level, frequency distribution) for each area. During the test, key noise areas can be marked via the touchscreen 36, and the wireless transmission module 34 simultaneously sends the data to a PC for auxiliary analysis. After the test, the data is automatically saved and can be exported as audio / video or screenshot files for later rectification reference. When changing the test position, only the bracket 1 needs to be adjusted to repeat the above test process.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vehicle interior noise testing device, characterized in that: The test block (2), processor (3), and bracket (1) are included. The test block (2) is equipped with a microphone array (21) that is signal-connected to the processor (3). The microphone array (21) consists of multiple microphones and is used to collect in-vehicle noise. The bracket (1) is used to install the test block (2) in the vehicle. The processor (3) is used to receive and process the sound signals from the microphone array (21). The processor (3) is equipped with an acoustic imaging module (31), a spectrum analysis module (32), and a data storage module (33). The acoustic imaging module (31) is used to perform imaging analysis on the sound data collected by the microphone array (21). The spectrum analysis module (32) is used to analyze the frequency and amplitude distribution of the sound collected by the microphone array (21). The data storage module (33) is used to save the test data.

2. The in-vehicle noise testing device according to claim 1, characterized in that: The test block (2) is equipped with a camera (22) and a light unit (23). Both the camera (22) and the light unit (23) are connected to the processor (3) via signals. The camera (22) is used for image capture, and the light unit (23) is used for providing light. The processor (3) is used to combine the image from the camera (22) with the sound imaging module (31) to output a sound imaging image and an actual picture. The processor (3) is used to activate the light unit (23) when conducting the test.

3. The in-vehicle noise testing device according to claim 2, characterized in that: The test block (2) is provided with a waterproof and dustproof membrane, which is used to enhance the waterproof and dustproof performance of the microphone array (21), camera (22) and lighting unit (23).

4. The in-vehicle noise testing device according to claim 1, characterized in that: The bracket (1) includes an adsorption base (11), a telescopic rod (12), and a fixing frame (13). The adsorption base (11) is detachably mounted on the vehicle interior structure. One end of the telescopic rod (12) is rotatably connected to the adsorption base (11), and the other end of the telescopic rod (12) is rotatably connected to the fixing frame (13). The fixing frame (13) is provided with an assembly component (4), which is used to assemble the test block (2) onto the fixing frame (13).

5. The in-vehicle noise testing device according to claim 4, characterized in that: The assembly component (4) includes an assembly bolt (41), an assembly gear (42), an assembly rack (43), and an assembly locking block (44). The assembly gear (42) is rotatably mounted in the fixed frame (13). The assembly rack (43) is slidably mounted on the fixed frame (13) and meshes with the assembly gear (42). The assembly bolt (41) is rotatably mounted on the fixed frame (13) and threadedly connected to the fixed frame (13). The assembly bolt (41) is connected to the assembly gear (42). The assembly locking block (44) is connected to the assembly rack (43) and is used to lock and fix the test block (2).

6. The in-vehicle noise testing device according to claim 5, characterized in that: The assembled rack (43) is provided with a locking groove (51) and a locking auxiliary groove (54). A locking block (5) is slidably disposed in the locking groove (51). A first locking spring (52) is provided in the locking groove (51) to connect the inner wall of the locking groove (51) and the locking block (5). The locking block (5) can be inserted into the locking auxiliary groove (54) of another assembled rack (43). The inner wall of the locking auxiliary groove (54) is provided with... A locking groove (531) is provided, and a locking block (53) is slidably disposed in the locking groove (531). A second locking spring (532) is provided in the locking groove (531) to connect the inner wall of the locking groove (531) and the locking block (53). The side walls of the locking block (53) and the locking block (5) are both inclined and can abut against each other. The elasticity of the first locking spring (52) is greater than that of the second locking spring (532).

7. The in-vehicle noise testing device according to claim 5, characterized in that: The test block (2) is provided with an assembly hole for the assembly bolt (41) to be inserted, and the assembly bolt (41) is threaded to the inner wall of the assembly hole.

8. The in-vehicle noise testing device according to claim 1, characterized in that: The test block (2) is detachably equipped with a touch screen (36), which is connected to the processor (3) by a signal. The touch screen (36) is used to display test images and data and can be operated.

9. The in-vehicle noise testing device according to claim 1, characterized in that: The processor (3) is equipped with a wireless transmission module (34), which is used to transmit the data stored in the processor (3) to an external device.

10. The in-vehicle noise testing device according to claim 1, characterized in that: The test block (2) is detachably provided with a battery module (35) electrically connected to the processor (3), the battery module (35) being used to power the processor (3).

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