Tire noise detection device

Abstract

The utility model discloses a tire noise detection device, which comprises a shell, a printed circuit board is arranged in the shell, a plurality of groups of components are arranged at the top of the printed circuit board, a three-axis acceleration sensor chip is arranged on one side of the printed circuit board, a connector is integrally formed on one side of the shell, and the connector is connected with the three-axis acceleration sensor chip. According to the utility model, through the arrangement of the printed circuit board, the three-axis acceleration sensor chip, the connector and the digital transceiver chip, the digital transceiver chip with the PDM interface is adopted to replace AD2428 with high cost; compared with a traditional high-cost scheme, the device has the advantages that the cost is reduced by more than 15%, the performance is guaranteed, the production cost is greatly reduced, the tire noise detection technology is easier to popularize, and the tire noise detection method is suitable for popularization and application. And the product is more competitive.

Description

Technical Field

[0001] This utility model relates to the field of automotive tire noise detection technology, specifically a tire noise detection device. Background Technology

[0002] With the rapid development of the automotive industry, consumers are increasingly demanding higher levels of vehicle comfort and noise control. As the only part of a vehicle that comes into contact with the road surface, tire noise is one of the most important sources of overall vehicle noise. Especially at high speeds, tire noise can significantly affect the comfort of passengers inside the vehicle. Therefore, accurate detection and analysis of tire noise is of great significance for tire design optimization and the improvement of vehicle NVH performance.

[0003] Currently, tire noise detection mainly relies on laboratory bench testing or real vehicle road testing. However, the high cost of the core acceleration sensor in traditional noise reduction systems restricts the widespread adoption of noise reduction functions. Since current tire noise detection sensors all use the ADI AD2428+ADXL317 combination solution, the high cost has become the main bottleneck restricting the large-scale application of this technology. Therefore, we need to propose a tire noise detection device. Utility Model Content

[0004] The purpose of this invention is to provide a tire noise detection device. By setting up a printed circuit board, a three-axis accelerometer chip, and a digital transceiver chip, it uses a digital transceiver chip with a PDM interface, such as AD2427 or a domestically produced similar chip, to replace the high-cost AD2428. It also uses a single-axis or three-axis accelerometer with a PDM data interface, such as ADXL318 / 319, to replace an accelerometer with a TDM interface, such as ADXL317, thereby reducing costs. While ensuring performance, it significantly reduces production costs, making tire noise detection technology easier to popularize and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A tire noise detection device includes a housing, a printed circuit board disposed inside the housing, a plurality of components disposed on the top of the printed circuit board, a triaxial accelerometer chip disposed on the top of the printed circuit board, a connector integrally formed on one side of the housing, a digital transceiver chip disposed on the top of the printed circuit board, and a sealing cover plate fixedly installed inside the housing to protect the printed circuit board.

[0007] Preferably, a fixing frame is installed inside the housing, and the printed circuit board is disposed inside the fixing frame.

[0008] Preferably, the outer wall of the sealing cover is adapted to the inner wall of the outer casing, and the sealing cover is located at the top of the fixed frame.

[0009] Preferably, the triaxial accelerometer chip has a PDM data interface.

[0010] Preferably, the digital transceiver chip uses a digital signal interface with PDM.

[0011] Preferably, mounting bases are integrally formed on both sides of the outer shell, and mounting holes are respectively opened on the top of the two sets of mounting bases.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention reduces costs by using a printed circuit board, a three-axis accelerometer chip, a connector, and a digital transceiver chip. It replaces the high-cost AD2428 with a digital transceiver chip featuring a PDM interface, and uses a single-axis or three-axis accelerometer with a PDM data interface, such as the ADXL318 / 319, instead of an accelerometer with a TDM interface, such as the ADXL317. Compared to traditional high-cost solutions, this device reduces costs by more than 15%. While maintaining performance, it significantly reduces production costs, making tire noise detection technology more readily available and enhancing product competitiveness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the outer shell and sealing cover of this utility model;

[0016] Figure 3 This is a cross-sectional view of the outer casing of this utility model.

[0017] In the diagram: 1. Housing; 2. Printed circuit board; 3. Components; 4. Triaxial accelerometer chip; 5. Connector; 6. Digital transceiver chip; 7. Sealing cover; 8. Fixing frame; 9. Mounting base; 10. Mounting hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 This utility model provides a technical solution:

[0020] A tire noise detection device includes a housing 1, a printed circuit board 2 inside the housing 1, multiple components 3 on the top of the printed circuit board 2, a triaxial accelerometer chip 4 on the top of the printed circuit board 2, a connector 5 integrally formed on one side of the housing 1, a digital transceiver chip 6 on the top of the printed circuit board 2, and a sealing cover 7 fixedly installed inside the housing 1 to protect the printed circuit board 2. The printed circuit board 2, triaxial accelerometer chip 4, connector 5, and digital transceiver chip 6 are arranged in a way that allows for electrical and physical connection. The printed circuit board 2 uses a fiberglass board with a recommended TG value ≥155℃. The connector 5 (≥4 pin) is used for electrical and physical connection with the master node or the next slave node. The connector 5 is integrally formed with the housing 1. The housing 1 and sealing cover 7 are designed to withstand IP69 waterproof and dustproof testing, thus protecting the printed circuit board 2 and components 3 from damage. The digital transceiver chip 6 can be an ADI AD2427 or a domestically produced digital transceiver chip with similar functions. This chip is required to have a master-slave architecture with a PDM digital signal interface, supporting applications requiring at least 10 slave nodes. It should have at least 32 channels of audio data transmission capability for both uplink and downlink, a data bandwidth of at least 50Mbps, and a transmission distance of at least 40 meters. For the triaxial accelerometer chip, the recommended choice is the Analog Devices ADXL318 / 319, or a similar domestic sensor with the aforementioned characteristics. It should have an acceleration range greater than ±3.5g and a noise density less than 50μg / √Hz, with an operating frequency range greater than 1kHz. Most importantly, it should have a PDM interface that can directly connect to the AD2427 or similar digital transceiver chips for data exchange, significantly reducing costs and product size. This patent achieves low noise, a wide operating frequency range, good output linearity, and extremely fast and controllable transmission delay. It can also network multiple tire noise detection devices to detect noise information at different locations on the vehicle body, and its cost is more than 15% lower than traditional solutions.

[0021] A fixing frame 8 is installed inside the housing 1, and the printed circuit board 2 is set inside the fixing frame 8. The fixing frame 8 ensures that the printed circuit board 2 can be stably installed inside the housing 1, preventing the components 3 from becoming loose or damaged due to vehicle vibration.

[0022] The outer wall of the sealing cover 7 is adapted to the inner wall of the outer casing 1. The sealing cover 7 is located on the top of the fixed frame 8. The setting of the sealing cover 7 makes the fit between the sealing cover 7 and the fixed frame 8 tighter, preventing dust and moisture from entering the device. The adaptation design between the sealing cover 7 and the inner wall of the outer casing 1 further enhances the sealing performance of the device, ensuring its long-term stable operation in harsh environments.

[0023] The triaxial accelerometer chip 4 is equipped with a PDM data interface. By using the PDM data interface, the triaxial accelerometer chip 4 can directly match and connect with the AD2427 or similar digital transceiver chips for data exchange, which greatly saves costs and reduces the size of the product.

[0024] The digital transceiver chip 6 adopts a digital signal interface with PDM. By setting up the digital transceiver chip 6, the digital signal interface with PDM can replace the high-cost AD2428. In addition, the three-axis accelerometer chip 4 with PDM data interface can replace the ADXL317 with TDM interface, thereby reducing costs and effectively improving the competitiveness of the product.

[0025] The outer shell 1 has an integrally formed mounting base 9 on both sides. The top of the two sets of mounting bases 9 are respectively provided with mounting holes 10. The mounting bases 9 and mounting holes 10 facilitate the installation of the detection device. At the same time, the symmetrically distributed mounting bases 9 and mounting holes 10 distribute the force more evenly, avoiding the problem of uneven load caused by unilateral fixation. This ensures that the device remains stable when the vehicle is traveling at high speed or in a bumpy environment, reduces the risk of loosening, and enhances the stability of the outer shell 1 installation.

[0026] Working principle: When this utility model is in use, the triaxial accelerometer chip 4 collects the vibration signal generated by the contact between the tire and the road surface during vehicle driving. The triaxial accelerometer chip 4 converts the collected analog vibration signal into a digital signal and transmits it to the digital transceiver chip 6 through the PDM interface. The digital transceiver chip 6 is responsible for receiving the digital signal from the triaxial accelerometer chip 4 and performing preliminary processing. The digital transceiver chip 6 supports a master-slave architecture and can transmit the processed tire noise signal to the main controller or other slave nodes of the vehicle noise reduction system through the connector 5. The system generates corresponding reverse sound waves according to the frequency and intensity of the tire noise signal to cancel in-vehicle noise and improve driving comfort.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tire noise detection device comprising a housing (1), characterized in that: The inside of the shell (1) is provided with a printed circuit board (2), the top of the printed circuit board (2) is provided with a plurality of groups of components (3), the top of the printed circuit board (2) is provided with a three-axis acceleration sensor chip (4), one side of the shell (1) is integrally provided with a connector (5), the top of the printed circuit board (2) is provided with a digital transceiver chip (6), and the inside of the shell (1) is fixedly provided with a sealing cover plate (7) for protecting the printed circuit board (2).

2. The tire noise detection device of claim 1, wherein: The inside of the shell (1) is provided with a fixed frame (8), and the printed circuit board (2) is arranged in the inside of the fixed frame (8).

3. A tire noise detection device according to claim 2, characterized in that: The outer wall of the sealing cover plate (7) is matched with the inner wall of the shell (1), and the sealing cover plate (7) is located on the top of the fixed frame (8).

4. The tire noise detection apparatus of claim 1, wherein: The three-axis acceleration sensor chip (4) adopts a PDM data interface.

5. The tire noise detection apparatus of claim 1, wherein: The digital transceiver chip (6) adopts a PDM digital signal interface.

6. The tire noise detection apparatus of claim 1, wherein: Both sides of the shell (1) are integrally provided with a mounting seat (9), and the top of each of the two mounting seats (9) is provided with a mounting hole (10).

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