Composite type automobile pickup

Abstract

The utility model relates to the field of vehicle-mounted sound pick-up design, in particular to a composite type automobile sound pick-up which comprises a waterproof shell, a sealing cover, a connector, a circuit board, a digital transceiver chip and a sound pick-up component, the sealing cover is clamped at the top of the waterproof shell in an embedded mode, the connector is arranged on one side of the top of the sealing cover, the circuit board is installed on the lower portion in the waterproof shell, and the digital transceiver chip is connected with the sound pick-up component. A digital transceiver chip is soldered on one side of the surface of the circuit board, and a pickup component is installed on the surface of the circuit board close to the digital transceiver chip. According to the utility model, the power supply decoupling component, the digital transceiver chip, the communication module and other electrical components are integrated into the same sound pickup, so that the requirement of additionally installing an independent emergency call microphone is avoided, and the hardware cost is reduced; and the sound signal in the PDM format is converted into a data format suitable for network transmission through the digital transceiver chip, and is sent to the main node through the communication module, so that efficient, stable and high-quality audio data acquisition and transmission are realized.

Description

Technical Field

[0001] This utility model relates to the field of vehicle microphone design, and in particular to a composite vehicle microphone. Background Technology

[0002] A car microphone is an audio capture device installed inside a car to record or transmit in-vehicle sound. It can be used for various purposes, such as voice recognition, in-car communication, recording, and security monitoring. Modern car microphones typically feature high sensitivity and low noise characteristics, enabling them to clearly capture sound in various environments.

[0003] With the rapid growth of car ownership in China and the continuous improvement of relevant laws and regulations, especially the increasingly stringent requirements for vehicle safety, future vehicles will be widely equipped with emergency call systems to quickly notify rescue services in the event of traffic accidents or other emergencies.

[0004] However, the current common practice is to install a separate microphone for the emergency call system, which not only increases the vehicle manufacturing cost but also makes the interior space layout more complicated.

[0005] Therefore, a composite car microphone was specially designed to solve the above-mentioned technical problems. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a composite car microphone.

[0007] The technical solution of this utility model is as follows: a composite car microphone, comprising a waterproof shell, a sealing cover, a connector, a circuit board, a digital transceiver chip, microphone components, power decoupling components, a communication module, rubber rings, positioning posts, and limiting sleeves. The sealing cover is embedded in the top of the waterproof shell. A connector is located on one side of the top of the sealing cover. A circuit board is installed in the lower part of the waterproof shell. A digital transceiver chip is soldered to one side of the circuit board surface. A microphone component is installed on the circuit board surface near the digital transceiver chip. A power decoupling component is installed on the circuit board surface near the microphone component. A communication module is installed on the circuit board surface near the power decoupling component. The digital transceiver chip, microphone component, power decoupling component, and communication module interact with each other. Rubber rings are symmetrically arranged at the bottom of the waterproof shell, and positioning posts are fixed inside each rubber ring. Limiting sleeves are symmetrically arranged at the bottom of the sealing cover corresponding to the positions of the positioning posts. After the sealing cover and waterproof shell are locked together, the limiting sleeves engage with the positioning posts to achieve locking.

[0008] As a preferred technical solution of this utility model, it also includes a buffer pad, and a buffer pad is provided between the bottom of the waterproof shell and the bottom of the circuit board.

[0009] As a preferred technical solution of this utility model, the upper two sides of the waterproof shell are symmetrically provided with slots.

[0010] As a preferred technical solution of this utility model, it also includes a wedge-shaped card plate, a guide block and an elastic element. The wedge-shaped card plate is slidably arranged through both sides of the inside of the sealing cover. The guide block is symmetrically arranged on the inside of the sealing cover corresponding to the sliding part of the wedge-shaped card plate. The wedge-shaped card plate is slidably connected with the corresponding guide block. An elastic element is provided between the close surfaces of the two wedge-shaped card plates and the inside of the sealing cover. The wedge-shaped part of the wedge-shaped card plate is engaged with the slot of the waterproof shell.

[0011] As a preferred technical solution of this utility model, it also includes a sealing ring. The sealing ring is glued to the bottom edge of the sealing cover, and the sealing ring is tightly fitted to the upper inner wall of the waterproof shell.

[0012] As a preferred technical solution of this utility model, it also includes a heat dissipation component. The heat dissipation component is embedded inside the closed cover, and the heat dissipation port of the heat dissipation component is provided with a dustproof mesh.

[0013] As a preferred technical solution of this utility model, it also includes a protective sleeve, with the waterproof shell covered by a protective sleeve.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention integrates electrical components such as power decoupling components, digital transceiver chips and communication modules into the same microphone, avoiding the need for additional independent emergency call microphones and reducing hardware costs; and the PDM format audio signal is converted into a data format suitable for network transmission by the digital transceiver chip and sent to the master node through the communication module, realizing efficient, stable and high-quality audio data acquisition and transmission.

[0015] 2. This utility model effectively reduces the impact of vehicle vibration on electronic components through the internal buffer pad, extends the service life of the equipment, and improves the quality of audio capture.

[0016] 3. This utility model enhances the locking effect between the closed cover and the waterproof shell through the design of positioning post and limiting sleeve, wedge-shaped card plate, guide block and elastic element, preventing accidental opening or loosening, and increasing the reliability of the overall structure.

[0017] 4. This utility model, through the design of waterproof shell, closed cover, rubber ring, sealing ring, etc., ensures the waterproof and dustproof performance of this equipment in various environments, especially keeping the inside dry and clean even when washing vehicles or in severe weather conditions. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the circuit board, rubber ring, and positioning post components of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the circuit board, digital transceiver chip, and communication module of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the positioning post, buffer pad, and waterproof shell of this utility model.

[0022] Figure 5 This is a three-dimensional structural diagram of the components of this utility model, including the limiting sleeve, wedge-shaped clamping plate, and guide block.

[0023] Figure 6 This is a three-dimensional structural diagram of the wedge-shaped clamping plate, elastic element, and guide block of this utility model.

[0024] The above-mentioned attached drawings include the following reference numerals: 1. Waterproof shell, 2. Sealing cover, 3. Connector, 4. Circuit board, 41. Digital transceiver chip, 42. Sound pickup component, 43. Power decoupling component, 44. Communication module, 5. Rubber ring, 6. Positioning post, 7. Buffer pad, 8. Limiting sleeve, 9. Wedge-shaped plate, 91. Guide block, 10. Elastic element, 11. Sealing ring, 12. Heat dissipation component, 13. Protective sleeve. Detailed Implementation

[0025] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0026] Example: A composite car microphone, such as Figures 1-6As shown, the device includes a waterproof housing 1, a sealing cover 2, a connector 3, a circuit board 4, a digital transceiver chip 41, a microphone component 42, a power decoupling component 43, a communication module 44, a rubber ring 5, a positioning post 6, and a limiting sleeve 8. The waterproof housing 1 protects the internal electronic components from external environmental influences such as dust and moisture, ensuring the device operates normally under various conditions. The upper sides of the inner walls of the waterproof housing 1 have symmetrical slots. The sealing cover 2 is embedded in the top of the waterproof housing 1. A connector 3 is located on one side of the top of the sealing cover 2. The connector 3 is used to transmit power and data signals via cables. Connected to the vehicle's power supply system and in-vehicle audio network, a circuit board 4 is installed in the lower part of the waterproof housing 1. This circuit board houses and connects all electronic components and serves as the core control platform for the entire device. A digital transceiver chip 41 is soldered to one side of the circuit board 4. A microphone 42 is installed near the digital transceiver chip 41 on the surface of the circuit board 4. The microphone 42 is connected to the digital transceiver chip 41 via circuitry on the circuit board 4. The microphone 42 captures ambient sound within the vehicle and features high sensitivity and low noise characteristics, making it suitable for clear recording in noisy environments. The digital transceiver chip 41 is connected to... The circuit board receives PDM audio data from the pickup element 42, converts it into a format suitable for network transmission (such as I2S), and sends the audio data to the master node via a daisy-chain connection. A power decoupling element 43 is installed on the surface of the circuit board 4 near the pickup element 42. The power decoupling element 43 stabilizes the power supply voltage, ensuring a stable power supply to all components on the circuit board 4 and preventing voltage fluctuations from affecting sensitive electronic components. A communication module 44 is installed on the surface of the circuit board 4 near the power decoupling element 43. The communication module 44 is responsible for transmitting audio data over the network. The system transmits signals and supports call functionality during emergency calls. The digital transceiver chip 41, the microphone 42, the power decoupling component 43, and the communication module 44 are all connected and work together through the lines on the circuit board 4. Rubber rings 5 ​​are symmetrically arranged at the bottom of the waterproof shell 1. The rubber rings 5 ​​provide additional waterproof and dustproof protection and also serve as shock absorbers. Positioning posts 6 are fixed inside each rubber ring 5. Limiting sleeves 8 are symmetrically arranged at the bottom of the sealing cover 2 corresponding to the positions of each positioning post 6. After the sealing cover 2 and the waterproof shell 1 are locked together, the limiting sleeves 8 are locked together with the positioning posts 6.

[0027] like Figure 4 As shown, it also includes a buffer pad 7. A buffer pad 7 is provided between the bottom of the waterproof shell 1 and the bottom of the circuit board 4, which can reduce the impact of vibration generated during vehicle operation on internal electronic components and extend the service life of the equipment.

[0028] like Figure 5 and Figure 6As shown, it also includes a wedge-shaped locking plate 9, a guide block 91, and an elastic element 10. The wedge-shaped locking plate 9 is slidably arranged through both sides of the inside of the sealing cover 2. The guide block 91 is symmetrically arranged on the inside of the sealing cover 2 corresponding to the sliding part of the wedge-shaped locking plate 9. The wedge-shaped locking plate 9 and the corresponding guide block 91 are slidably connected. The elastic element 10 is arranged between the close surfaces of the two wedge-shaped locking plates 9 and the inside of the sealing cover 2. The wedge-shaped part of the wedge-shaped locking plate 9 engages with the slot of the waterproof shell 1, which can enhance the locking effect between the sealing cover 2 and the waterproof shell 1, prevent accidental opening or loosening, and increase the reliability of the overall structure.

[0029] like Figure 6 As shown, it also includes a sealing ring 11. The sealing ring 11 is glued to the bottom edge of the sealing cover 2. The sealing ring 11 is tightly fitted to the upper inner wall of the waterproof shell 1 to ensure the sealing between the sealing cover 2 and the waterproof shell 1, providing a high level of waterproof and dustproof performance.

[0030] like Figure 1 As shown, it also includes a heat dissipation component 12. The heat dissipation component 12 is embedded inside the closed cover 2. The heat dissipation port of the heat dissipation component 12 is equipped with a dustproof mesh. The heat dissipation component 12 helps the device dissipate heat, keeps the internal temperature within a safe range, and improves the stability of the device.

[0031] like Figure 1 As shown, it also includes a protective sleeve 13. The waterproof shell 1 is covered with a protective sleeve 13, which provides additional physical protection for the waterproof shell 1 to prevent external impacts and wear.

[0032] When using this device, first install it in the designated location, usually in a suitable location such as the driver's cabin or roof of the vehicle. Confirm that the waterproof shell 1 is aligned and snapped into place with the limiting sleeve 8 on the sealing cover 2 through the positioning post 6, forming a tight seal. The buffer pad 7 plays a shock-absorbing role, protecting the internal electronic components from vibration during vehicle operation. Connect this device to the vehicle's power supply system through the connector 3, and ensure that it is correctly connected to the vehicle audio network (such as the A2B network). The connector 3 is used to transmit power and data signals, ensuring that the digital transceiver chip 41 can work normally and communicate with the master node.

[0033] When the vehicle starts, this device automatically powers on. The power decoupling component 43 stabilizes the power supply voltage, ensuring a stable power supply to all components on the circuit board 4. Simultaneously, the digital transceiver chip 41 performs a self-test, checking whether the connected audio pickup component 42, communication module 44, and other peripheral devices are functioning correctly. As a slave node, this device is recognized and initialized by the master node in the network. The master node manages the entire audio network, including all nodes such as this audio pickup component 42, through a daisy-chain connection. The nodes send configuration commands to set the device's operating parameters, such as sampling rate and gain. The audio pickup component 42 (e.g., a MEMS microphone) begins capturing ambient sound inside the vehicle. Due to its high sensitivity and low noise characteristics, it can clearly record sound even in noisy environments. These sound signals are output in PDM format and directly transmitted to the digital transceiver chip 41. The digital transceiver chip 41 receives signals from the audio pickup component 42. The PDM audio data is converted into a format suitable for network transmission (such as I2S) and sent to the master node via a daisy chain connection. The digital transceiver chip 41 is also responsible for processing other control commands, such as adjusting the working status of the device or reporting fault information. In order to ensure the stable transmission of LVDS signals, especially when using POC (phantom power supply), the sealing ring 11 at the bottom of the cover 2 is tightly fitted to the inner wall of the waterproof shell 1, ensuring that the pickup element 42 has a high level of waterproof and dustproof performance. Even in harsh environments, such as when washing a vehicle, the pickup element 42 can keep its interior dry and clean, extending its service life. The design of the limiting sleeve 8 and positioning post 6 between the cover 2 and the waterproof shell 1 ensures that the two are firmly locked together, preventing accidental opening or loosening. In addition, the design of the wedge plate 9, guide block 91 and elastic element 10 further enhances the locking effect of the cover 2 and increases the reliability of the overall structure.

[0034] In addition, this device includes an isolation filter network composed of inductors, capacitors, common-mode inductors, and ferrite beads. These components effectively isolate power supply noise and other interference signals, ensuring high-quality transmission of audio data. The LVDS signal lines adopt a symmetrical layout and equal-length wiring, with the differential impedance strictly controlled at 100Ω±10%, thereby improving the system's anti-interference capability and stability. The communication module 44 can access the audio data of all nodes on the network for use in emergency calls. This means that in an emergency, the existing audio network can be used directly without the need for additional pickup devices, simplifying system design and reducing costs. The master node periodically diagnoses the entire audio network and checks the working status of each node. If an abnormality is detected, such as a failure of the pickup component 42 or a communication interruption, the master node will trigger the corresponding alarm mechanism to notify the driver or maintenance personnel for timely handling. Through wireless or wired connections, the master node can remotely update the firmware and software of this device to ensure that it is always in optimal working condition and adapts to new functional requirements and technological advancements.

[0035] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A composite automotive microphone, characterized in that: The system includes a waterproof housing (1), a sealing cover (2), a connector (3), a circuit board (4), a digital transceiver chip (41), a microphone component (42), a power decoupling component (43), a communication module (44), a rubber ring (5), a positioning post (6), and a limiting sleeve (8). The sealing cover (2) is embedded in the top of the waterproof housing (1). The connector (3) is located on one side of the top of the sealing cover (2). The circuit board (4) is installed in the lower part of the waterproof housing (1). The digital transceiver chip (41) is soldered on one side of the surface of the circuit board (4). The microphone component (42) is installed on the surface of the circuit board (4) near the digital transceiver chip (41). The microphone component (42) is installed on the surface of the circuit board (4) near the microphone component. A power decoupling component (43) is installed at the position of the device (42). A communication module (44) is installed on the surface of the circuit board (4) near the position of the power decoupling component (43). The digital transceiver chip (41), the microphone component (42), the power decoupling component (43) and the communication module (44) interact with each other. Rubber rings (5) are symmetrically arranged at the bottom of the waterproof shell (1). A positioning post (6) is fixed inside each rubber ring (5). A limit sleeve (8) is symmetrically arranged at the bottom of the sealing cover (2) corresponding to the position of each positioning post (6). After the sealing cover (2) and the waterproof shell (1) form a snap-fit ​​seal, the limit sleeve (8) engages with the positioning post (6) to achieve locking.

2. The composite car microphone as described in claim 1, characterized in that: It also includes a buffer pad (7), and a buffer pad (7) is provided between the bottom of the waterproof shell (1) and the bottom of the circuit board (4).

3. The composite car microphone as described in claim 2, characterized in that: The waterproof shell (1) has symmetrical slots on the upper two sides of the inner wall.

4. A composite car microphone as described in claim 3, characterized in that: It also includes a wedge-shaped plate (9), a guide block (91) and an elastic element (10). The wedge-shaped plate (9) is slidably arranged through both sides inside the closed cover (2). The guide block (91) is symmetrically arranged on the inner side of the closed cover (2) corresponding to the sliding part of the wedge-shaped plate (9). The wedge-shaped plate (9) is slidably connected to the corresponding guide block (91). An elastic element (10) is provided between the close surfaces of the two wedge-shaped plates (9) and the inner side of the closed cover (2). The wedge-shaped part of the wedge-shaped plate (9) is engaged with the slot of the waterproof shell (1).

5. A composite car microphone as described in claim 4, characterized in that: It also includes a sealing ring (11), and the sealing ring (11) is glued to the bottom edge of the sealing cover (2), and the sealing ring (11) is tightly attached to the upper inner wall of the waterproof shell (1).

6. A composite car microphone as described in claim 5, characterized in that: It also includes a heat dissipation component (12), and the heat dissipation component (12) is embedded inside the closed cover (2). The heat dissipation port of the heat dissipation component (12) is equipped with a dustproof net.

7. A composite car microphone as described in claim 6, characterized in that: It also includes a protective cover (13), and the waterproof shell (1) is covered with a protective cover (13).

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