Vehicle-mounted multi-channel wireless sound system and vehicle

Abstract

The utility model belongs to the audio signal transmission technical field, concretely relates to a kind of vehicle-mounted multi-channel wireless sound system and vehicle, it include: multiple loudspeaker, and: control module, control module includes main control control module and controlled control module;UWB component, including main control UWB component and controlled UWB component, main control UWB component is electrically connected with main control control module, controlled UWB component is electrically connected with controlled control module, each controlled control module is electrically connected with one or more loudspeaker.The utility model solves the problem that vehicle internal high fidelity audio signal transmission is limited by wiring harness cost, utilizes UWB transmission technology while high fidelity transmission audio signal, avoids complex audio line wiring, and single control loudspeaker can be formed multiple sound fields in vehicle.

Description

Technical Field

[0001] This utility model belongs to the field of audio signal transmission technology, specifically relating to a vehicle-mounted multi-channel wireless audio system and vehicle. Background Technology

[0002] Surround sound is an audio technology designed to break through the limitations of traditional two-channel stereo, creating a more immersive and spatial auditory environment for listeners, simulating the feeling of sound coming from all directions in the real world.

[0003] Surround sound uses multiple independent channel speakers placed in different positions around the listener (e.g., front, rear, left, right, and above). Audio signals are precisely assigned to different channels according to specific encoding formats (e.g., Dolby Digital, DTS). In audio signal transmission technologies, the most common method to ensure fidelity is using oxygen-free copper (OFC) shielded RCA analog audio cables. These cables utilize single-crystal oxygen-free copper with a purity of 99.95% or higher, or even pure silver or pure gold, wrapped with one or more shielding layers, and then with an insulation layer to reduce signal crosstalk and sound quality degradation. These cables are thicker, heavier, and, more importantly, more expensive. When used for audio signal transmission in vehicle audio systems, they significantly increase wiring difficulty and overall vehicle weight, especially increasing vehicle manufacturing costs. Utility Model Content

[0004] The present invention aims to provide an in-vehicle multi-channel wireless audio system and vehicle to solve the problem of high-fidelity audio signal transmission in vehicles being limited by the cost of wiring harnesses.

[0005] To achieve the above objectives, the present invention provides a vehicle-mounted multi-channel wireless audio system, comprising:

[0006] Multiple speakers, and:

[0007] The control module includes a main control module and a controlled control module.

[0008] The UWB component includes a master UWB component and a controlled UWB component. The master UWB component is electrically connected to the master control module, and the controlled UWB component is electrically connected to the controlled control module. Each controlled control module is electrically connected to one or more speakers.

[0009] The working principle and beneficial effects of this solution are as follows:

[0010] UWB components are based on UWB (Ultra Wide Band) technology, a wireless communication technology that uses nanosecond-level (0.2-1.5 nanosecond) ultrashort pulses (above 500MHz) or extremely wideband continuous waves for data transmission. UWB technology offers advantages such as low system complexity, low transmitted signal power spectral density, insensitivity to channel fading, low multipath latency (1 nanosecond), low interception capability, and high positioning accuracy. It is particularly suitable for high-speed, wireless, lossless transmission of audio data from multiple speakers within vehicles, as well as the transmission of control signals. Audio data is distributed from the master UWB component to the controlled UWB components of each speaker. The speakers analyze the received audio data, achieving high-fidelity audio signal transmission while replacing expensive audio cables, significantly reducing in-vehicle wiring harnesses, lowering costs, and avoiding complex audio cable routing (physical audio cable routing requires consideration of crosstalk avoidance).

[0011] For multi-channel audio data, the main control module converts and compresses the audio signal of each channel and binds it to the location information of the channel. For example, the left channel is bound to the identification code of the left speaker (such as the unique ID of each speaker), the right channel is bound to the identification code of the right speaker, and the top channel is bound to the identification code of the roof speaker. Then, the audio data bound with the channel location information is transmitted to the controlled module through the UWB component. The controlled module performs decompression, parsing and other operations, and distributes the processed audio data to the speaker corresponding to the identification code, so that each speaker can be controlled to produce sound individually.

[0012] This solution allows all or some of the speakers to produce sound. When some speakers are operating, multiple sound field zones can be created throughout the space, with different audio played in each zone, allowing multiple people to hear different sounds.

[0013] In this solution, the audio signal transmission uses UWB components for wireless transmission, which reduces the constraints of physical audio cables compared to existing technologies. This makes it easier to design speakers that are movable, especially those that can swing and slide, thereby further facilitating the adjustment of the sound field center.

[0014] Optionally, it also includes an occupant sensing module, which is connected to the control module. The occupant sensing module detects the occupant's position within the vehicle interior, allowing the control module to activate the nearest speaker to the occupant.

[0015] Optionally, the occupant perception module includes a Child Presence Detection (CPD) component or a visual recognition component. The CPD component detects or indirectly determines vital signs (such as breathing and heartbeat) inside the vehicle using sensor data from millimeter-wave radar, cameras, or seat pressure sensors, accurately locating the occupant's position. The visual recognition component utilizes a camera and a server connected to the camera. The camera captures images of the vehicle interior and transmits them to the server. The server then uses a neural network system to analyze the images and identify and locate human figures within them, thereby obtaining the occupant's location information.

[0016] Optionally, each controlled UWB component is electrically connected to a separate controlled control module, and each controlled control module is electrically connected to a separate speaker. Each controlled UWB component can individually receive data from the master controlled UWB component, resulting in higher redundancy, less signal distortion, and easier control, requiring only control over whether a single speaker is emitting sound.

[0017] Optionally, both the master UWB component and the controlled UWB component include an antenna, a low-noise amplifier (LNA), a digital-to-analog converter (ADC), a digital signal processor (DSP), and a storage component. These are used for receiving, processing, and transmitting data.

[0018] Optionally, the main control UWB component includes multiple transceiver units, which are distributed and the distance between adjacent transceiver units is no less than 5cm. In this solution, the UWB transceiver units employ UWB positioning technology: based on Time-of-Flight (TOF), the distance between any two nodes is estimated based on the propagation time of the wireless signal. Specifically, in UWB positioning technology, the transmitting node transmits a signal, the receiving node receives the signal, and the propagation time of the signal from the transmitting node to the receiving node is measured. The positioning accuracy can reach the centimeter level. This solution fully utilizes the characteristics of UWB technology; the controlled UWB component communicates simultaneously with the multiple distributed transceiver units of the main control UWB component, enabling centimeter-level positioning of the controlled UWB component, thereby determining the location of the speakers and facilitating the acquisition of the location information of each speaker.

[0019] Optionally, it also includes an angle adjustment mechanism, which includes a first driver, a fixed end, and a working end. The first driver drives the working end to rotate relative to the fixed end. The first driver is electrically connected to the controlled module, and some or all of the speakers are mounted on the working end. The angle adjustment mechanism controls the orientation of the speakers, thereby controlling the center of the sound field formed by the multi-channel system.

[0020] Optionally, the system also includes a displacement adjustment mechanism, which comprises a second driver, a slide rail, and a slide base. The second driver drives the slide base to move along the slide rail. The second driver is electrically connected to the controlled module, and some or all of the speakers are mounted on the slide base. By adjusting the position of the speakers through the displacement adjustment mechanism, the center of the sound field formed by the multi-channel system can be controlled.

[0021] Optionally, the loudspeaker is a directional loudspeaker. A directional loudspeaker can control sound waves within a specific area, with the sound wave intensity significantly attenuated outside the area, thus minimizing interference between multiple sound fields.

[0022] Another aspect of this application is to provide a vehicle in which the aforementioned in-vehicle multi-channel wireless audio system is installed. Attached Figure Description

[0023] Figure 1 This is an interior perspective view of the vehicle in an embodiment of this utility model;

[0024] Figure 2 This is a control logic block diagram of the in-vehicle multi-channel wireless audio system in this embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of the speaker mounted on the angle adjustment mechanism in another embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the speaker mounted on the displacement adjustment mechanism in another embodiment of the present invention. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method:

[0028] The markings in the accompanying drawings include: vehicle body 1, speaker 2, main control module 3, controlled control module 4, main control UWB component 5, controlled UWB component 6, servo motor 7, mounting base 8, speaker mounting base 9, slide rail 10, and slide block 11.

[0029] Example

[0030] This embodiment is basically as follows: Figure 1As shown: A vehicle equipped with a multi-channel wireless audio system includes the vehicle body 1, within which are distributed multiple speakers 2, including mid-to-high frequency speakers 2 mounted in the center console, high frequency speakers 2 on the A-pillars, low frequency speakers 2 below the front and rear doors, high frequency speakers 2 near the center axis on the roof, multiple mid-to-high frequency speakers 2 in the headrests of the front and rear seats, a row of mid-to-high frequency speakers 2 above and behind the headrests of the front seats, and a row of mid-to-high frequency speakers 2 above and behind the headrests of the rear seats. Each speaker 2 includes not only a horn but also corresponding audio input and resolution circuitry. Audio signals are input through this circuitry to allow the horn to play the audio. This technology is mature and will not be elaborated upon here. Each speaker 2 has a unique ID within the audio system.

[0031] The control module includes a main control module 3 and a controlled control module 4. Both the main control module 3 and the controlled control module 4 are integrated circuit boards with input, output, calculation, and storage functions, along with their electronic components and peripheral circuits. In this embodiment, the main control module 3 is the ECU system located in the car's center console. Without increasing costs, the vehicle's own ECU system is used for the input, output, storage, and calculation required by the audio system. In this embodiment, the ECU system integrates an audio control system that controls channels, sound effects, etc. This system is responsible for encoding and outputting the audio signals of each channel. Each controlled control module 4 is a separate on-board MCU, and each speaker 2 is controlled by a separate on-board MCU. In other embodiments, to reduce costs, multiple adjacent speakers 2 can be controlled by a single on-board MCU. For example, speakers 2 in each seat headrest share a single on-board MCU, each row of speakers 2 on the roof shares a single on-board MCU, multiple speakers 2 on the center console share a single on-board MCU, and multiple speakers 2 on each door share a single on-board MCU.

[0032] The audio and control signals from each speaker 2 output by the main control module are transmitted through UWB components. The UWB components include a main control UWB component 5 located on the center console and multiple controlled UWB components 6, with one controlled UWB component 6 connected to each onboard MCU. Both the main control UWB component 5 and the controlled UWB components 6 include an antenna, a low-noise amplifier, a digital-to-analog converter, a digital signal processor, and storage components. The main control module binds the audio and control signals to the IDs of each speaker 2 and converts them into digital signals. These digital signals contain the ID information, control information, and audio signal of each speaker 2. The main control UWB component 5 then broadcasts these digital signals through the antenna. Each speaker 2's controlled UWB component 6 receives the digital signals, and the controlled control module 4 converts and parses them to obtain the ID information, control information, and audio signal. The control information, after being parsed by the onboard MCU, controls whether the speaker 2 with the corresponding ID plays audio, and only plays the audio corresponding to that speaker 2's ID.

[0033] The acquisition of the aforementioned control information is facilitated by the occupant perception module. In this embodiment, the occupant perception module includes a CPD component. The CPD component detects or indirectly determines vital signs (such as breathing and heartbeat) inside the vehicle through sensor data such as millimeter-wave radar, cameras, or seat pressure sensors, accurately locates the position of the occupants, and outputs the occupant position information to the main control module 3. The main control module 3 generates control information for each speaker 2 that needs to be activated. For example, if the occupant perception module detects that an occupant is sitting in the left rear seat through sensor data such as millimeter-wave radar, cameras, or seat pressure sensors, it can control the activation of the speakers 2 closest to that seat according to the needs of stereo sound effects, so that the sound field center is concentrated on the left rear seat and has more channels, thereby improving the stereo sound experience for the occupant in that seat.

[0034] In other embodiments, a visual recognition component can be used, utilizing a camera and a server connected to the camera. The camera captures images inside the vehicle and transmits them to the server. The server then uses a neural network system to analyze the human figures in the images and identify and locate them, positioning the occupant's head and ears so that the sound field center is concentrated on the occupant's head and ears, resulting in a better stereo sound experience.

[0035] As attached Figure 2 As shown, when the occupant perception module detects that an occupant is sitting in a certain seat, such as the left rear seat, the main control module 3 can bind the audio signals of each channel to the IDs of the multiple speakers 2 closest to the left rear seat (in this embodiment, the IDs of each speaker 2 are: A1...An, B1...Bn, ..., N1...Nn), namely, the speaker 2 on the left rear seat headrest, the two speakers 2 on the upper left side of the rear seat headrest, the two speakers 2 on the upper left side of the front seat headrest, the speaker 2 on the left rear door, etc. Then, the main control UWB component 5 broadcasts digital signals. The controlled UWB component 6 in the controlled control module 4 receives the digital signals, and after conversion and parsing by the vehicle MCU of the controlled control module 4, obtains the ID information, control information, and audio signals, and outputs them to the corresponding ID speaker 2, so that the multiple speakers 2 closest to the left rear seat can play sound, thereby creating a good stereo experience for the occupant in the left rear seat. Similarly, different sound fields can be created for occupants in other seats, and different audio can be played.

[0036] The multi-channel wireless audio system is powered by the vehicle power supply system, which provides wired power to the UWB components, occupant sensing module, speaker 2, control module, etc.

[0037] In another embodiment, to create a better stereo experience for each occupant, the speaker 2 is a directional speaker 2 and also includes an angle adjustment mechanism, as shown in the attached figure. Figure 3 As shown, the angle adjustment mechanism includes a first driver, a fixed end, and a working end. The first driver drives the working end to rotate relative to the fixed end. The first driver is electrically connected to the controlled control module 4. Some or all of the speakers 2 are mounted on the working end. That is, an angle adjustment mechanism with controllable angle is added between each speaker 2 and the vehicle. The fixed end of the angle adjustment mechanism is fixed to the vehicle. For example, the first driver is a servo motor 7 with a mounting base 8. The mounting base 8 is fixedly mounted to the vehicle as the fixed end. A speaker mounting base 9 (as the working end) is mounted on the output end of the servo motor 7. The speaker 2 is mounted on the speaker mounting base 9. By controlling the rotation angle of the servo motor 7 through the control module, the orientation of the speaker 2 can be controlled. After the CPD component obtains the accurate position information of the occupant, especially the position of the occupant's head, the control module can calculate the orientation of multiple speakers 2 closest to the occupant, placing the occupant's head at the center of the sound field formed by these speakers 2, further enhancing the occupant's stereo experience.

[0038] In another embodiment, to create a better stereo experience for each occupant, a displacement adjustment mechanism is also included, as shown in the attached figure. Figure 4 As shown, the displacement adjustment mechanism includes a second driver (a servo motor), a slide rail 10, and a slide block 11. The slide rail 10 is fixed to the vehicle. The second driver drives the slide block 11 to move on the slide rail 10. The second driver is electrically connected to the controlled module 4. The speaker 2 is mounted on the slide block 11. By controlling the rotation of the second driver through the control module, the position of the slide block 11 is precisely adjusted, thereby adjusting the position of the speaker 2 to place the speaker 2 in a position that provides the best listening experience for the occupants.

[0039] The above are merely embodiments of this utility model. This utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are able to access all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims. The specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A vehicle-mounted multi-channel wireless audio system, characterized in that: include: Multiple speakers, and: The control module includes a main control module and a controlled control module. The UWB component includes a master UWB component and a controlled UWB component. The master UWB component is electrically connected to the master control module, and the controlled UWB component is electrically connected to the controlled control module. Each controlled control module is electrically connected to one or more speakers.

2. The in-vehicle multi-channel wireless audio system according to claim 1, characterized in that: It also includes an occupant perception module, which is connected to the control module.

3. The in-vehicle multi-channel wireless audio system according to claim 2, characterized in that: The occupant perception module includes a CPD component or a visual recognition component.

4. The in-vehicle multi-channel wireless audio system according to claim 1, characterized in that: Each controlled UWB component is electrically connected to a single controlled control module, and each controlled control module is electrically connected to a single speaker.

5. The in-vehicle multi-channel wireless audio system according to claim 4, characterized in that: Both the master UWB component and the controlled UWB component include an antenna, a low-noise amplifier, a digital-to-analog converter, a digital signal processor, and a storage component.

6. The in-vehicle multi-channel wireless audio system according to claim 5, characterized in that: The main control UWB component includes multiple transceiver units, which are distributed in a distributed manner, with a distance of no less than 5cm between two adjacent transceiver units.

7. The in-vehicle multi-channel wireless audio system according to claim 1, characterized in that: It also includes an angle adjustment mechanism, which includes a first driver, a fixed end and a working end. The first driver drives the working end to rotate relative to the fixed end. The first driver is electrically connected to the controlled module. Some or all of the speakers are mounted on the working end.

8. The in-vehicle multi-channel wireless audio system according to claim 1, characterized in that: It also includes a displacement adjustment mechanism, which includes a second driver, a slide rail and a slide base. The second driver drives the slide base to move on the slide rail. The second driver is electrically connected to the controlled module. Some or all of the speakers are mounted on the slide base.

9. The in-vehicle multi-channel wireless audio system according to claim 1, characterized in that: The speaker is a directional speaker.

10. A vehicle, characterized in that: The vehicle is equipped with a multi-channel wireless audio system as described in claims 1 to 9.

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