Vibration pickup module outside vehicle

Abstract

The utility model relates to a vibration pickup module outside a vehicle, which belongs to the technical field of vibration pickup modules and comprises a vibration sealing component and a shell, the vibration sealing component and the shell form a closed cavity, a signal amplification circuit board is arranged in the cavity, and the vibration sealing component comprises a vibration component and a sealing component. The vibration component comprises a hard material component, the hard material component is electrically connected with a vibration sensor, and the vibration sensor is electrically connected with the signal amplification circuit board. The full sealing design is adopted, the components are all arranged in the module, the outer surface is completely sealed, a pickup hole is not needed, and the structure is simple; the connector which is in electric signal connection with the vehicle machine is a waterproof connector with an integrally injection-molded shell, so that reliable dustproof and waterproof effects can be realized, and the waterproof and dustproof grade requirement of IP69K is met.

Description

Technical Field

[0001] The utility model relates to an external vibration sound pickup module for a vehicle, and belongs to the technical field of vibration sound pickup modules. Background Art

[0002] Vehicles are becoming increasingly intelligent, integrating various types of sensors to perceive their surroundings, such as 3D cameras, LiDAR, millimeter-wave radar, and ultrasonic sensors. Furthermore, emergency vehicle detection and external voice control are becoming mainstream features. These two features require external sensors that can receive sound. For example, autonomous driving (SAE Level 3 and above) requires detecting and responding to approaching emergency vehicles, which requires reliable sound reception from outside the vehicle.

[0003] Currently, microphone modules are mainly used to receive sounds outside the car, such as Figure 1 As shown, the microphone module includes an outer shell 6 and a lower shell 13. The lower shell 13 is provided with a sound hole 14. Sound is received through the sound hole 14, and it cannot be completely sealed. It is necessary to use a waterproof and breathable mesh 15 to stick on the sound hole 14 to achieve protection of the sound hole 14. However, the environment outside the car is relatively complex and harsh. It needs to be exposed to rain, snow, water, dust and other pollutants. As time accumulates, the waterproof mesh is prone to clogging and damage, which leads to reduced module performance or failure. In addition, the waterproof mesh is not resistant to water flow impact and can only meet the IPX7 waterproof level at most. Without the help of a shielding structure, it cannot meet higher waterproof requirements. Moreover, when the waterproof mesh is dirty and affects the performance, it cannot be cleaned and the entire microphone module accessory can only be replaced. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide an outdoor vibration pickup module with a completely sealed design. All components are inside the module, the outer surface is completely sealed, and no pickup hole is required. The connector for connecting the electrical signal with the vehicle computer uses a waterproof connector with an integral injection molded shell, so it can achieve reliable dust and water resistance and meet the IP69K waterproof and dustproof grade requirements.

[0005] The purpose of this utility model is achieved through the following technical measures: a vibration pickup module outside the vehicle, including a vibration sealing component and a shell, the vibration sealing component and the shell form a closed cavity, a signal amplification circuit board is provided in the cavity, the vibration sealing component includes a vibration component and a sealing component, the vibration component includes a hard material component, the hard material component is electrically connected to a vibration sensor, and the vibration sensor is electrically connected to the signal amplification circuit board.

[0006] As a further improvement of the above technical solution:

[0007] The hard material component includes a vibration sensor circuit board, and the vibration sensor circuit board is electrically connected to the vibration sensor.

[0008] The vibration sensor circuit board is fixedly arranged on a hard material component, and the thickness of the vibration sensor circuit board is 0.3mm-1mm.

[0009] The sealing component is a flexible material component, which is annularly arranged on the periphery of the hard material component, and is fixedly and sealedly connected to the shell.

[0010] The vibration sensor circuit board is arranged at the center of the bottom of the shell, and the length of the vibration sensor circuit board is the same as the length of the shell.

[0011] The sealing components are respectively arranged between the two sides of the vibration sensor circuit board and the side walls of the shell, and the sealing components are made of flexible material.

[0012] The width of the vibration sensor circuit board is greater than 3 mm, and the width of the vibration sensor circuit board is smaller than the width of the housing.

[0013] The maximum amplitude of the flexible material component is ±1mm~±5mm, and the thickness is 0.3mm-1mm.

[0014] A waterproof connector is provided on one side of the shell. A pin is provided in the waterproof connector. The pin is welded to the signal amplification circuit board.

[0015] Support ribs for supporting the signal amplifying circuit board are provided in the shell.

[0016] Due to the adoption of the above technical solution, the advantages of the present invention compared with the existing technology are: the present invention adopts a vibration pickup module to pick up the emergency vehicle alarm sound outside the vehicle and the voice command for vehicle computer control. When the sound is transmitted to the vibration pickup module, the vibration sealing component is stimulated to vibrate, and the vibration sensor thereon picks up the vibration and converts it into an electrical signal. After the signal is amplified and filtered by the signal amplification circuit board, the electrical signal is amplified and the vibration noise transmitted by the vehicle computer is filtered out. The signal amplification circuit board is welded to the PIN pin of the waterproof connector to realize the electrical transmission between the vibration pickup module and the vehicle computer, thereby completing the pickup of the sound outside the vehicle. The present invention is a completely sealed design, the components are all inside the module, the outer surface is completely sealed, and no pickup hole is required. The connector for connecting the electrical signal to the vehicle computer uses a waterproof connector with an integral injection molded shell, so that reliable dust and water resistance can be achieved, meeting the waterproof and dustproof grade requirements of IP69K.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Schematic diagram of the structure of the microphone module in the background technology;

[0019] Figure 2 This is a schematic cross-sectional view of an exterior vehicle vibration pickup module in Example 1 of the present utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of an off-vehicle vibration sound pickup module in Example 1 of the present utility model;

[0021] Figure 4 This is a schematic cross-sectional view of an exterior vehicle vibration pickup module in Example 2 of the present utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of an off-vehicle vibration pickup module in Example 2 of the present utility model.

[0023] In the figure, 1-vibration sealing component, 2-vibration sensor circuit board, 3-vibration sensor, 4-connecting harness, 5-signal amplification circuit board, 6-housing, 7-pin needle, 8-waterproof connector, 9-fastening bolt, 10-support rib, 11-hard material component, 12-flexible material component, 13-lower shell, 14-sound hole, 15-waterproof breathable mesh, 16-sealing structure. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. Example 1

[0027] like Figure 2-Figure 3 As shown, an outdoor vibration pickup module includes a vibration sealing component 1 and a shell 6. The vibration sealing component 1 and the shell 6 form a closed cavity. A signal amplification circuit board 5 is provided in the cavity. Support ribs 10 for supporting the signal amplification circuit board 5 are provided in the shell 6.

[0028] The vibration sealing component 1 includes a vibration component and a sealing component. The vibration component includes a hard material component 11. A vibration sensor circuit board 2 is provided on the hard material component 11. The vibration sensor circuit board 2 is fixedly arranged on the hard material component 11. The thickness of the vibration sensor circuit board 2 is 0.3mm-1mm. A vibration sensor 3 is electrically connected to the vibration sensor circuit board 2. A connecting harness 4 is provided between the vibration sensor 3 and the signal amplification circuit board 5. The vibration sensor 3 and the signal amplification circuit board 5 are electrically connected through the connecting harness 4. The sealing component is a flexible material component 12. The hard material component 11 is rectangular. The flexible material component 12 is annularly arranged on the outer periphery of the hard material component 11. The flexible material component 12 and the hard material component 11 are integrated components or discrete components bonded together. The flexible material component 12 is fixedly sealed and connected to the outer shell 6 to achieve reliable dustproof and waterproof, which can meet the dustproof and waterproof level of IP69K. The flexible material component 12 can vibrate with the excitation of the sound signal, with a maximum amplitude of ±1mm~±5mm and a thickness of 0.3mm-1mm.

[0029] An integrally-injected waterproof connector 8 is provided on one side of the housing 6 , and a pin 7 is provided inside the waterproof connector 8 . The pin 7 is welded to the signal amplifying circuit board 5 , and the signal amplifying circuit board 5 is provided with a pin welding hole. Example 2

[0030] like Figure 4-Figure 5As shown, a vibration pickup module outside the vehicle has the same other structures as those in Example 1. The difference from Example 1 is that: the vibration sealing component 1 includes a vibration component and a sealing component. The vibration component includes a hard material component 11. The hard material component 11 is a vibration sensor circuit board 2. The vibration sensor circuit board 2 is rectangular, the thickness of the vibration sensor circuit board 2 is 0.3mm-1mm, the width of the vibration sensor circuit board 2 is greater than 3mm, the width of the vibration sensor circuit board 2 is smaller than the width of the shell 6, the vibration sensor circuit board 2 is arranged at the center position of the bottom of the shell 6, the length of the vibration sensor circuit board 2 is the same as the length of the shell 6, the vibration sensor circuit board 2 and the shell 6 are fixedly connected by fastening bolts 9, and the sealing components are respectively arranged between the two sides of the vibration sensor circuit board 2 and the side walls of the shell 6, and the sealing components are flexible material components 12.

[0031] The present invention adopts a vibration pickup module to pick up emergency vehicle alarm sounds outside the vehicle and voice commands for vehicle computer control. When the sound is transmitted to the vibration pickup module, the vibration sealing component is stimulated to vibrate. The vibration sensor 3 thereon picks up the vibration and converts it into an electrical signal. After the signal is amplified and filtered by the signal amplification circuit board 5, the electrical signal is amplified and the vibration noise transmitted by the vehicle computer is filtered out. The signal amplification circuit board 5 is welded to the PIN pin 7 of the waterproof connector 8 to realize electrical transmission between the vibration pickup module and the vehicle computer, thereby completing the pickup of the sound outside the vehicle.

[0032] The utility model adopts a completely sealed design. All components are inside the module, and the outer surface is completely sealed. There is no need for a sound pickup hole. The connector for connecting the electrical signal with the vehicle computer uses a waterproof connector 8 with an integral injection molded shell. Therefore, it can achieve reliable dust and water resistance and meet the IP69K waterproof and dustproof grade requirements. Moreover, if dust and foreign matter accumulate in the present invention and affect the sensitivity, it can be directly rinsed with water without replacing the module.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An external vibration pickup module, characterized by: The invention comprises a vibration sealing component (1) and a housing (6), wherein the vibration sealing component (1) and the housing (6) form a sealed cavity, wherein a signal amplifying circuit board (5) is provided in the cavity, and the vibration sealing component (1) comprises a vibration component and a sealing component, wherein the vibration component comprises a hard material component (11), wherein a vibration sensor (3) is electrically connected to the hard material component (11), and the vibration sensor (3) is electrically connected to the signal amplifying circuit board (5).

2. The vehicle exterior vibration pickup module according to claim 1, characterized in that: The hard material component (11) includes a vibration sensor circuit board (2), and the vibration sensor circuit board (2) is electrically connected to the vibration sensor (3).

3. The vehicle exterior vibration pickup module according to claim 2, characterized in that: The vibration sensor circuit board (2) is fixedly arranged on the hard material component (11), and the thickness of the vibration sensor circuit board (2) is 0.3 mm-1 mm.

4. The vehicle exterior vibration pickup module according to claim 2, characterized in that: The sealing component is a flexible material component (12), which is arranged in a ring shape on the outer periphery of the hard material component (11), and the flexible material component (12) is fixedly and sealedly connected to the outer shell (6).

5. The vehicle exterior vibration pickup module according to any one of claims 2 or 3, characterized in that: The vibration sensor circuit board (2) is arranged at the center of the bottom of the housing (6), and the length of the vibration sensor circuit board (2) is the same as the length of the housing (6).

6. The vehicle exterior vibration pickup module according to claim 5, characterized in that: The sealing components are respectively arranged between the two sides of the vibration sensor circuit board (2) and the side walls of the housing (6), and the sealing components are flexible material components (12).

7. The vehicle exterior vibration pickup module according to claim 5, characterized in that: The width of the vibration sensor circuit board (2) is greater than 3 mm, and the width of the vibration sensor circuit board (2) is smaller than the width of the housing (6).

8. The vehicle exterior vibration pickup module according to claim 4, characterized in that: The flexible material component (12) has a maximum amplitude of ±1 mm to ±5 mm and a thickness of 0.3 mm to 1 mm.

9. The vehicle exterior vibration pickup module according to claim 1, characterized in that: A waterproof connector (8) is provided on one side of the housing (6), a pin (7) is provided in the waterproof connector (8), and the pin (7) is welded to the signal amplification circuit board (5).

10. The vehicle exterior vibration pickup module according to claim 1, characterized in that: Support ribs (10) for supporting the signal amplifying circuit board (5) are provided in the housing (6).

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