Vibration detection device

Abstract

The utility model relates to the field of noise reduction of intelligent cabins, in particular to a vibration detection device. Comprising a lower shell which is an installation carrier of all parts and is made of waterproof materials, a butt joint device is installed on the side portion of the lower shell, a protection substrate is fixed to the bottom in the lower shell, a printed circuit board is loaded on the protection substrate, a circuit assembly is arranged on the periphery of the top of the printed circuit board, and a digital transceiver chip is soldered in the middle of the top of the printed circuit board. The circuit assembly is electrically connected with the digital transceiver chip, the printed circuit board is connected with a flexible FPC (Flexible Printed Circuit) board which is bent downwards by 90 degrees through a connector, and the flexible FPC board is connected with a single-axis vibration sensor chip through a connector. A single-axis vibration sensor chip is adopted to replace a traditional three-axis sensor, so that unnecessary redundant design is reduced, and the cost of the sensor is reduced; the uniaxial sensor and the digital transceiver chip are connected through the flexible FPC board, so that the wiring and mounting processes are simplified, and the production cost and the maintenance difficulty are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of noise reduction of intelligent cockpit, specifically, a vibration detection device. BACKGROUND

[0002] Research shows that the main vibration noise contribution in the process of automobile driving comes from the vibration of the two axes of the vertical ground direction and the driving direction. These vibrations not only affect the driving comfort, but also may have adverse effects on the service life of the vehicle structure and parts.

[0003] However, the existing noise reduction system usually adopts a combination scheme of high-precision, multi-dimensional sensors and complex digital signal processing units. The cost of such high-end sensors and digital transceiver chips is high, which increases the overall cost of the vehicle noise reduction system. And using this scheme requires the use of a three-axis sensor, but the system integration of the three-axis sensor is complex, and the wiring and installation are difficult, which increases the production cost and maintenance difficulty. In addition, since the number and position of the sensor are fixed, it is difficult to adjust flexibly according to the specific vehicle model, which limits its application range.

[0004] Therefore, a low-cost and efficient vibration detection device is specially designed. UTILITY MODEL CONTENTS

[0005] The utility model discloses in order to overcome the shortcoming that exists in prior art, the utility model provides a low-cost and efficient vibration detection device.

[0006] A vibration detection device, comprising:

[0007] The lower shell is made of waterproof material and is the mounting carrier of various components. The lower shell side is provided with a docking device, and the lower shell inner bottom is fixed with a protection base plate. The protection base plate is loaded with a printed circuit board. The printed circuit board top is provided with a circuit assembly. The printed circuit board top is centrally soldered with a digital transceiver chip. The circuit assembly and the digital transceiver chip are electrically connected. The printed circuit board is connected with a 90 downward bending degree flexible FPC board through a connector. The flexible FPC board is connected with a single-axis vibration sensor chip through a connector.

[0008] The upper shell is made of waterproof material and is clamped on the top of the lower shell. The upper shell covers the various components in the lower shell, and the two sides of the upper shell are provided with a decoupling assembly for assisting disassembly.

[0009] Preferably, the single-axis vibration sensor chip and the digital transceiver chip are electrically connected.

[0010] Preferably, it further comprises positioning members, at least two, for assisting installation, and each positioning member is symmetrically arranged outside the docking device.

[0011] Preferably, the upper shell is provided with a plurality of heat dissipation holes equidistantly arranged on the inner top portion.

[0012] Preferably, the upper shell is provided with a plurality of grooves on the two side portions.

[0013] Preferably, the utility model also comprises a limiting plate which is arranged symmetrically on the two side portions of the lower shell and is embedded in the grooves of the upper shell.

[0014] Preferably, the utility model comprises a pressing rod, a matching plate, a guide rod and a spring, the grooves on the two side portions of the upper shell are slidably provided with the outwardly protruding pressing rods, the one end of the two pressing rods inserted into the lower shell is provided with the matching plate, the lower portion of the matching plate is wedge-shaped, the wedge-shaped portion is clamped into the corresponding wedge-shaped groove, the grooves on the two side portions of the upper shell are slidably provided with the guide rods, the end portion of the guide rod is connected with the matching plate, and the spring is arranged between the guide rod and the corresponding matching plate.

[0015] The utility model has at least one of the following beneficial effects:

[0016] 1. The utility model discloses a single-axis vibration sensor chip is used instead of traditional three-axis sensor, reduces unnecessary redundancy design, reduces the cost of sensor itself, through the flexible FPC board connection single-axis sensor and digital transceiver chip, simplifies wiring and installation process, reduces production cost and maintenance difficulty.

[0017] 2. The utility model discloses a plurality of single-axis vibration sensor chips can be adjusted freely through the flexible FPC to adapt to the demand of different vehicle types and application scenarios, enhances the flexibility and application range of system. DRAWINGS

[0018] Figure 1 It is the general assembly structure schematic drawing of the utility model.

[0019] Figure 2 It is the explosion map display of the upper shell, the lower shell and the printed circuit board of the utility model.

[0020] Figure 3 It is the three-dimensional structure schematic drawing of the limiting plate, the pressing rod and the matching plate of the utility model.

[0021] Figure 4 It is the sectional view of the lower shell and the limiting plate after being partially cut open to show the internal components.

[0022] Figure 5 It is the three-dimensional structure schematic drawing of the printed circuit board, the circuit assembly and the flexible FPC board of the utility model.

[0023] The marks in the drawings are: 1 - lower shell, 11 - adapter, 12 - positioning piece, 13 - protection base plate, 14 - limiting plate, 141 - wedge-shaped groove, 2 - upper shell, 21 - heat dissipation hole, 22 - pressing rod, 23 - matching plate, 24 - guide rod, 25 - spring, 3 - printed circuit board, 31 - circuit component, 4 - digital transceiver chip, 5 - flexible FPC board, 6 - single-axis vibration sensor chip. DETAILED DESCRIPTION

[0024] Reference herein to an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combinable with other embodiments.

[0025] Embodiment: A vibration detection device, as shown in Figures 1-5 includes:

[0026] The lower shell 1 is the installation carrier of various components, provides mechanical support, is made of waterproof material, and can withstand IP69 waterproof and dustproof test to prolong the service life and protect the internal components from being damaged. The front side of the lower shell 1 is provided with a docking device 11, which provides an interface for electrical and physical connection for communication with the master node or other slave nodes to ensure smooth data transmission path and support multi-node networking. The inner bottom of the lower shell 1 is fixed with a protection base plate 13, and the protection base plate 13 is loaded with a printed circuit board 3 for data processing and transmission. The protection base plate 13 is used to fix the printed circuit board 3 and provide additional mechanical protection to reduce the influence of vibration on the circuit thereon. The printed circuit board 3 is provided with a circuit assembly 31 at the top periphery, which provides power management, signal conditioning and other necessary auxiliary functions. The printed circuit board 3 is centrally soldered with a digital transceiver chip 4 at the top. The digital transceiver chip 4 is used to process and encode the received data and transmit it to the central control system or other nodes through the connector of the master node or slave node. The digital transceiver chip 4 can support uplink and downlink audio data transmission capacity of 32 channels, data bandwidth of at least 50Mbps and overall transmission distance of 40 meters to ensure fast and clearly controllable transmission delay to meet the requirements of the noise reduction system. The circuit assembly 31 is electrically connected with the digital transceiver chip 4 to ensure stable operation of the digital transceiver chip 4 and other components and improve the overall system performance. The printed circuit board 3 is connected with a 90-degree downwardly bent flexible FPC board 5 through a connector. The 90-degree downward bending design of the flexible FPC board 5 can save space and adapt to different installation angles. The flexible FPC board 5 realizes stable transmission of PDM format vibration signals and reduces interference and attenuation. The flexible FPC board 5 is connected with a single-axis vibration sensor chip 6 through a connector. The single-axis vibration sensor chip 6 is used to collect vibration signals in the vertical ground direction and the driving direction in real time and convert them into digital signals in PDM format. The single-axis vibration sensor chip 6 has a noise density of 9 micrograms per root Hz with a maximum of plus or minus 10 grams, which provides accurate vibration data. The single-axis vibration sensor chip 6 supports a working frequency range of up to 7 kHz, covering a wide range of vibration frequencies. The single-axis vibration sensor chip 6 is electrically connected with the digital transceiver chip 4, and the digital transceiver chip 4 is used to initialize and prepare to receive data from the single-axis vibration sensor chip 6.

[0027] The upper shell 2, made of waterproof material, ensures that the internal components are not affected by the external environment. It is snapped onto the top of the lower shell 1 and covers the components inside the lower shell 1. The upper shell 2 and the lower shell 1 cooperate to provide easy disassembly and maintenance. The front and rear sides of the upper shell 2 are provided with a release assembly for auxiliary disassembly and rotation. Several heat dissipation holes 21 are equidistantly opened on the top of the upper shell 2 to improve air circulation. The heat dissipation holes 21 can maintain the internal temperature balance and prevent local overheating. The front and rear sides of the upper shell 2 are provided with grooves to accommodate the release assembly.

[0028] like Figures 1-2 As shown, it also includes positioning elements 12, at least two of which are used to assist in installation. Each positioning element 12 is symmetrically arranged on the outside of the docking device 11 to ensure precise alignment of the device during assembly and avoid electrical connection problems.

[0029] like Figures 1-4 As shown, it also includes a limiting plate 14 as a stabilizing component. The limiting plate 14 is symmetrically arranged on the front and rear sides of the top of the lower shell 1 and is fitted into the groove of the upper shell 2. The limiting plate 14 has a wedge-shaped groove 141, which facilitates disassembly and reinstallation and improves maintenance convenience.

[0030] like Figures 2-4 As shown, the release assembly includes a pressing rod 22, a mating plate 23, a guide rod 24, and a spring 25. The pressing rod 22 is slidably mounted on the grooves on both sides of the upper shell 2. The end of each pressing rod 22 that extends into the lower shell 1 is provided with a mating plate 23. The lower part of the mating plate 23 is wedge-shaped and is engaged in the corresponding wedge groove 141. Pressing down the pressing rod 22 causes the mating plate 23 to disengage from the wedge groove 141 of the limiting plate 14, allowing the upper shell 2 to be easily disassembled. The guide rod 24 is slidably mounted on both sides of the grooves on both sides of the upper shell 2. The end of the guide rod 24 is connected to the mating plate 23. A spring 25 is provided between each guide rod 24 and the corresponding mating plate 23.

[0031] When the device is powered on, the digital transceiver chip 4 initializes, preparing to receive data from the single-axis vibration sensor chip 6. Simultaneously, it establishes a stable communication link with the master node or other slave nodes via a connector, ensuring unobstructed data transmission. At this time, the single-axis vibration sensor chip 6 also begins real-time acquisition of vibration signals in the vertical direction and driving direction. The acquired analog vibration signals are quickly converted into PDM (Pulse Density Modulation) format digital signals. This format is not only efficient but also suitable for high-speed transmission. The single-axis vibration sensor chip 6 transmits the PDM format vibration signals to the digital transceiver chip 4 on the printed circuit board 3 via a connector on the flexible FPC board 5. The digital transceiver chip 4 processes and encodes the received data and transmits it to the central control system or other nodes via the connector of the master or slave node, enabling multi-sensor array networking. The heat dissipation holes 21 on the top of the upper shell 2 facilitate air circulation, carrying away internal heat and ensuring the normal operation of the digital transceiver chip 4 and other circuit components 31. Operating within a specified temperature range extends service life and improves system stability. If sensor chip replacement or adjustment is required, simply press the lever 22 to disengage the mating plate 23 from the wedge-shaped groove 141 of the limiting plate 14, easily removing the upper shell 2. After replacement or adjustment, re-clamp the upper shell 2 to ensure the device's sealing and reliability. The design of the positioning component 12 and the disengagement assembly makes the entire process simple and quick, improving maintenance efficiency and user experience. Furthermore, this vibration detection device is not only suitable for noise reduction in a single vehicle but can also achieve broader applications through networking. Multiple single-axis vibration sensor chips 6 can be mounted on the printed circuit board 3 as needed. The angle of each single-axis vibration sensor chip 6 can be freely adjusted via a flexible FPC to adapt to different vehicle models and application scenarios, enhancing system flexibility and application range. Through the connectors of the master or slave nodes, multiple vibration detection devices can work collaboratively to form a complete vibration monitoring network, providing comprehensive support for the noise reduction system of the intelligent cockpit.

[0032] The above-described embodiments are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A vibration detection device, characterized in that, Including: The lower shell (1) serves as the mounting carrier for each component and is made of waterproof material. A docking device (11) is installed on the side of the lower shell (1). A protective substrate (13) is fixed inside the bottom of the lower shell (1). A printed circuit board (3) is mounted on the protective substrate (13). A circuit assembly (31) is set on the top periphery of the printed circuit board (3). A digital transceiver chip (4) is soldered at the center of the top of the printed circuit board (3). The circuit assembly (31) and the digital transceiver chip (4) are electrically connected. The printed circuit board (3) is connected to a flexible FPC board (5) with a 90° downward bend through a connector. A single-axis vibration sensor chip (6) is connected to the flexible FPC board (5) through a connector. The upper shell (2) is made of waterproof material and is snapped onto the top of the lower shell (1). The upper shell (2) covers all the components inside the lower shell (1), and both sides of the upper shell (2) are equipped with a release assembly to assist in disassembly and rotation.

2. The vibration detection device according to claim 1, characterized in that: The single-axis vibration sensor chip (6) is electrically connected to the digital transceiver chip (4).

3. The vibration detection device according to claim 2, characterized in that, It also includes: Positioning elements (12), at least two in number, are used to assist in installation and are symmetrically arranged outside the docking device (11).

4. The vibration detection device according to claim 3, characterized in that: The top of the upper shell (2) is provided with several heat dissipation holes (21) at equal intervals to improve air circulation.

5. A vibration detection device according to claim 4, characterized in that: Grooves are provided on both sides of the upper shell (2).

6. A vibration detection device according to claim 5, characterized in that, It also includes: The limiting plate (14), as a stabilizing component, is symmetrically arranged on both sides of the top of the lower shell (1) and fitted into the groove of the upper shell (2). A wedge-shaped groove (141) is provided in the limiting plate (14).

7. A vibration detection device according to claim 6, characterized in that, The release assembly includes: a pressing rod (22), which is slidably disposed on the grooves on both sides of the upper shell (2), and the end of the pressing rod (22) protrudes outward; The mating plate (23) is set at one end of the two pressing rods (22) that extend into the lower shell (1). The lower part of the mating plate (23) is wedge-shaped and the wedge-shaped part is engaged in the corresponding wedge groove (141). The guide rod (24) is slidably disposed on both sides of the groove on both sides of the upper shell (2), and the end of the guide rod (24) is connected to the mating plate (23); Springs (25) are disposed between each guide rod (24) and the corresponding mating plate (23).

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