Vehicle-mounted wireless audio system and vehicle

Abstract

The utility model belongs to the audio signal transmission technical field, concretely relates to a kind of vehicle-mounted wireless sound system and vehicle, comprising: main control module and multiple loudspeaker and:UWB component, including main control UWB component and controlled UWB component, main control UWB component is connected with main control module;Angle adjusting component, angle adjusting component includes driver and angle control module, angle control module is electrically connected with controlled UWB component and driver, and loudspeaker is installed on the working end of driver;Occupant sensing module, occupant module is connected with main control module.The utility model can guarantee the stereo sound effect experience of occupant while high-fidelity transmission audio signal, and does not depend on high quality, high-priced wiring harness, does not need complex wiring, and cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of audio signal transmission technology, specifically relating to a vehicle-mounted 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 (such as in front, behind, left, right, and above). The audio signal is precisely assigned to different channels according to a specific encoding format (such as Dolby Digital, DTS, etc.). The listener is located at the center of this sound field composed of multiple speakers (or the "center of the sound sphere," "sweet spot"), and can perceive the direction of the sound source, its movement trajectory, and the ambient atmosphere.

[0004] In audio signal transmission technologies, the most common method to ensure fidelity is using oxygen-free copper (OFC) shielded RCA analog audio cables. The core of this technology is the use of 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 insulating layer to reduce signal crosstalk and sound quality degradation. These cables are thicker, heavier, and, most importantly, more expensive. When used for audio signal transmission in vehicle audio systems, they significantly increase wiring complexity and overall vehicle weight, and consequently, vehicle manufacturing costs.

[0005] Meanwhile, in the in-car environment, the sound field center is usually fixed due to the limitations of the number and location of the speakers. However, there are usually multiple seats in a car, and when passengers sit in different seats, they may deviate from the optimal sound field center, resulting in a significant reduction in the stereo effect. Utility Model Content

[0006] The present invention aims to provide a vehicle-mounted wireless audio system and vehicle that can ensure the stereo sound experience of passengers while transmitting audio signals with high fidelity.

[0007] To achieve the above objectives, the present invention provides a vehicle-mounted wireless audio system, comprising: The main control module and multiple speakers, and: UWB components include a master UWB component and a controlled UWB component, with the master UWB component connected to the master control module; An angle adjustment assembly, which includes a driver and an angle control module, the angle control module being electrically connected to the controlled UWB assembly and the driver; The speaker is mounted on the working end of the driver; The occupant perception module is connected to the main control module.

[0008] The working principle and beneficial effects of this solution are as follows: 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, reducing costs, significantly decreasing in-vehicle wiring harnesses, and avoiding complex audio cable routing (physical audio cable routing requires consideration of crosstalk avoidance).

[0009] Due to the irregular shape and limited size of the vehicle interior, traditional technologies typically fix speakers in fixed positions within the vehicle. With occupants seated in different locations, it's not guaranteed that they will be at the center of the sound field for optimal sound quality. This solution utilizes an occupant sensing module to detect the occupant's position within the vehicle. The main control module, after obtaining the occupant's position information, generates speaker angle control information and transmits this information via a UWB component to the angle control module of the angle adjustment component. The angle control module then analyzes the control information and controls the driver. The angle adjustment component adjusts the speaker's orientation and angle, directing the speakers toward the occupant. This ensures that the direct and reflected sound from each speaker is superimposed on the designated occupant's position (especially centered at the occupant's head), thereby guaranteeing a good stereo sound experience for that occupant.

[0010] Because the audio signal transmission in this solution uses wireless transmission via UWB components, compared to existing technologies, it reduces the constraints of physical audio cables, making it easier to design speakers that are movable, especially those that can be tilted, thereby further facilitating the adjustment of the sound field center.

[0011] 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.

[0012] 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.

[0013] Optionally, the driver includes a single-degree-of-freedom adjustment structure or a multi-degree-of-freedom adjustment structure with at least two degrees of freedom adjustment, and a speaker is mounted on the working end of the single-degree-of-freedom or multi-degree-of-freedom adjustment structure. The single-degree-of-freedom adjustment structure allows for simple and efficient control of the speaker's rotation in one direction; the adjustment of at least two degrees of freedom allows the speaker to rotate flexibly in the combined direction of at least two degrees of freedom. Both methods allow for control of the speaker's orientation.

[0014] Optionally, the multi-degree-of-freedom adjustment structure includes a first base, a rotating seat, a first drive motor, a rotating shaft, and a second drive motor. The rotating seat is mounted on the first base, the first drive motor is mounted on the first base and drives the rotating seat to rotate, the rotating shaft is rotatably connected to the side of the rotating seat away from the first base, the second drive motor is mounted on the rotating seat and drives the first rotating shaft to rotate, and the speaker is mounted on the first rotating shaft. This solution constitutes an adjustment structure with two degrees of freedom. The cooperation of the first and second drive motors allows the speaker to face any angle within the hemispherical area.

[0015] Optionally, the multi-degree-of-freedom adjustment structure includes a servo mount, a first servo, a second servo, and a connecting frame. The servo mount is fixed to the side of the second servo, the connecting frame is mounted on the output end of the second servo, the first servo is mounted on the connecting frame, and the speaker is mounted on the output end of the first servo. This design constitutes an adjustment structure with two degrees of freedom. The cooperation of the first and second servos allows the speaker to face any angle within the hemispherical area.

[0016] Optionally, the multi-degree-of-freedom adjustment structure includes a second base, a third base, and at least three telescopic cylinders. One end of each telescopic cylinder is hinged to the same side of the second base, and the other end of each telescopic cylinder is hinged to the side of the third base facing the second base. In this design, controlling the extension and retraction lengths of different telescopic cylinders allows the speaker to tilt in different directions, thereby controlling the speaker's orientation.

[0017] Optionally, the single-degree-of-freedom adjustment structure includes a third servo motor, the output of which is mounted on a mounting bracket. The speaker is mounted on the mounting bracket, and the single-degree-of-freedom adjustment structure allows the speaker to swing back and forth in one direction, thereby controlling the speaker's orientation.

[0018] Optionally, it also includes a slide rail and a slide base, with the slide base slidably connected to the slide rail. A power structure for driving the slide base to slide on the slide rail is mounted on the slide base. The power structure is electrically connected to the angle control module, and an angle adjustment component is mounted on the slide base. When the slide rail is installed inside the vehicle, and adjusting the speaker angle cannot guarantee the sound effect, the sliding of the slide base can be controlled to move the speaker, adjusting the distance between the speaker and the occupant to compensate for the sound effect.

[0019] Another aspect of this application is to provide a vehicle in which the aforementioned in-vehicle wireless audio system is installed.

[0020] Optionally, mid-to-high frequency speakers are installed on the center console, high frequency speakers are installed on the A-pillars and below the rear doors, and low frequency speakers are installed on both sides below the front doors.

[0021] Optionally, mid-to-high frequency speakers are installed on the B-pillars and C-pillars of the vehicle.

[0022] Optionally, a high-frequency speaker is installed on the roof, and a linear reciprocating motion mechanism is installed on the roof, with the high-frequency speaker mounted on the working end of the linear reciprocating motion mechanism.

[0023] Optionally, the master UWB component is mounted on the vehicle's center console, while the controlled UWB component is integrated into the angle control module. This allows the master UWB component to utilize the vehicle's computing and storage capabilities to generate the digital signals required for broadcasting; similarly, the controlled UWB component utilizes the capabilities of the angle control module to process the received digital signals. Attached Figure Description

[0024] Figure 1 This is an interior perspective view of the vehicle in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the single-degree-of-freedom adjustment structure in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the multi-degree-of-freedom adjustment structure in another embodiment of the present invention; Figure 4This is a schematic diagram of the multi-degree-of-freedom adjustment structure in another embodiment of the present invention; Figure 5 This is a schematic diagram of the multi-degree-of-freedom adjustment structure in another embodiment of the present invention; Figure 6 This is an interior perspective view of the vehicle in Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the structure of mounting a loudspeaker on a linear reciprocating motion mechanism in Embodiment 2 of this utility model; Figure 8 This is a control logic block diagram of the vehicle wireless audio system in Embodiment 1 of this utility model. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: vehicle body 1, speaker 2, angle control module 3, linear reciprocating motion mechanism 4, single-degree-of-freedom adjustment structure 5, third servo motor 501, mounting bracket 502, speaker bracket 503, first multi-degree-of-freedom adjustment structure 6, first base 601, rotating seat 602, first drive motor 603, rotating shaft 604, second drive motor 605, second multi-degree-of-freedom adjustment structure 7, servo motor mounting bracket 701, first servo motor 702, second servo motor 703, connecting bracket 704, third multi-degree-of-freedom adjustment structure 8, second base 801, telescopic cylinder 802, third base 803, lead screw mechanism 9, servo motor 10, fourth servo motor 11, base plate 12, power interface 13, main control UWB component 14, controlled UWB component 15.

[0026] Example 1 This embodiment is basically as follows: Figure 1 and Figure 8As shown: A vehicle equipped with an in-vehicle wireless audio system includes a vehicle body 1. Multiple speakers 2 are distributed within the vehicle body 1, including mid-to-high frequency speakers 2 installed in the center console, high frequency speakers 2 on the A-pillars and below the rear doors, low frequency speakers 2 on both sides of the front doors, mid-to-high frequency speakers 2 on the B and C pillars, and three high frequency speakers 2 on the left, center, and right sides of the rear seat roof. In this embodiment, the main control module is the ECU system located in the vehicle's center console. Without increasing costs, the vehicle's own ECU system performs the input, output, storage, and calculation required by the audio system. The ECU system in this embodiment integrates an audio control system that controls channels, sound effects, etc., and is responsible for encoding and outputting audio signals. All of the speakers 2 can be equipped with angle adjustment components (hidden within the vehicle body 1). In this embodiment, the speakers 2 on both sides of the rear seat roof and in the middle of the roof are equipped with angle adjustment components. Each speaker 2 includes not only a horn but also corresponding audio input and resolution circuitry. After inputting an audio signal through this circuitry, the horn can 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.

[0027] The actuator can be a single-degree-of-freedom adjustment structure 5 with only one degree of freedom adjustment, or a multi-degree-of-freedom adjustment structure with at least two degrees of freedom adjustment. In this embodiment, the actuator is a single-degree-of-freedom adjustment structure 5, which includes a third servo motor 501 and an angle control module 3. A speaker bracket 503 is mounted on the output end of the third servo motor 501, and a speaker 2 is mounted on the speaker bracket 503. The speaker 2 is then fixedly mounted on the vehicle body 1 by a mounting bracket 502, as shown in the attached figure. Figure 2 As shown, the entire driver structure is compact and simple to control, making it ideal for installation on car doors, A-pillars, B-pillars, and C-pillars. The angle control module 3 is an integrated circuit board with input, output, calculation, and storage functions, along with its electronic components and peripheral circuits. In this embodiment, it is an automotive-grade onboard MCU. After receiving control information, the angle control module 3 can control the rotation direction and angle of the driver, thereby achieving precise control of the orientation and angle of each speaker 2. In other embodiments, single-degree-of-freedom adjustment can also be achieved using control mechanisms such as curved gear racks or crank mechanisms.

[0028] In another embodiment, the actuator includes a first multi-degree-of-freedom adjustment structure 6 in addition to the angle control module 3, as shown in the attached figure. Figure 4As shown, the first multi-degree-of-freedom adjustment structure 6 includes a first base 601, a rotating seat 602, a first drive motor 603, a rotating shaft 604, and a second drive motor 605. The rotating seat 602 is mounted on the first base 601. The first drive motor is mounted on the first base 601 and drives the rotating seat 602 to rotate via belt drive. The rotating shaft 604 is rotatably connected to the side of the rotating seat 602 away from the first base 601. The second drive motor 605 is mounted on the rotating seat 602 and directly drives the first rotating shaft 604 to rotate. The speaker 2 is mounted on the first rotating shaft 604. In this embodiment, the multi-degree-of-freedom adjustment structure, through the above-mentioned components, forms a form similar to a radar control mechanism. By controlling the rotation of the first drive motor 603 and the second drive motor 605, the speaker 2 can be oriented at any angle within the hemispherical area.

[0029] In another embodiment, the actuator includes a second multi-degree-of-freedom adjustment structure 7 in addition to the angle control module 3, as shown in the attached figure. Figure 3 As shown, the second multi-degree-of-freedom adjustment structure 7 includes a servo mount 701, a first servo 702, a second servo 703, and a connecting frame 704. The servo mount 701 is fixed to the side of the second servo 703 and is used for fixed mounting on the vehicle body 1. The connecting frame 704 is mounted on the output end of the second servo 703, the first servo 702 is mounted on the connecting frame 704, and the speaker 2 is mounted on the output end of the first servo 702. This design constitutes an adjustment structure with two degrees of freedom. The cooperation of the first servo 702 and the second servo 703 allows the speaker 2 to face any angle within the hemispherical range.

[0030] In another embodiment, the actuator includes a third multi-degree-of-freedom adjustment structure 8 in addition to the angle control module 3, as shown in the attached figure. Figure 5 As shown, the third multi-degree-of-freedom adjustment structure 8 includes a second base 801, a third base 803, and six telescopic cylinders 802. Each telescopic cylinder 802 is a miniature electric cylinder. One end of each telescopic cylinder 802 is hinged to the same side of the second base 801, and the other end of each telescopic cylinder 802 is hinged to the side of the third base 803 facing the second base 801. In this design, controlling the extension and retraction lengths of different electric cylinders allows the speaker 2 to tilt in different directions, thereby controlling the orientation of the speaker 2.

[0031] In the above embodiments with multi-degree-of-freedom adjustment structures, the speaker 2 can be oriented at any angle within the hemispherical range. Compared with the single-degree-of-freedom adjustment structure 5, the orientation and angle of the speaker 2 are more flexible, and the same stereo effect can be achieved with fewer speakers 2.

[0032] As attached Figure 8As shown, the main control module obtains audio signals from each speaker 2 from the audio control system and generates control signals, which are then transmitted through a UWB component. The UWB component includes a main control UWB component 14 located on the central control panel and a separately controlled UWB component 15 for each speaker 2 whose angle can be controlled. The controlled UWB component 15 is integrated into the angle control module 3. Both the main control UWB component 14 and the controlled UWB component 15 include an antenna, a low-noise amplifier (LNA), a digital-to-analog converter (ADC), a digital signal processor (DSP), and a storage component. The main control module binds the audio signals and control signals to the IDs of the speakers 2 at each location (in this embodiment, the IDs of each speaker 2 are A1…An, and the corresponding drivers are B1…Bn) and converts them into digital signals. That is, the digital signals contain the ID information of each speaker 2, control information, and audio signals. Then, the main control UWB component 14 broadcasts the aforementioned digital signals through the antenna. Each speaker 2's controlled UWB component 15 receives digital signals, then converts and parses them to obtain ID information, control information, and audio signals. It then plays only the audio signal corresponding to the ID of its speaker 2 and outputs the control information corresponding to the ID to the angle control module 3 (if any) of the angle adjustment component corresponding to its speaker 2, thereby realizing the angle adjustment of the speaker 2.

[0033] The aforementioned control information is generated using an 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 using sensor data from millimeter-wave radar, cameras, or seat pressure sensors, accurately locating the position of the occupants. After locating the occupant's position, the occupant perception module outputs the occupant position information to the main control module. For example, if the occupant perception module detects that an occupant is sitting in the left rear seat using sensor data from millimeter-wave radar, cameras, or seat pressure sensors, then, according to the needs of stereo sound effects, the direction and angle of the B-pillar, the roof, and even the right-side speaker 2 can be adjusted to face the left-side seat, concentrating the sound field center on that seat and providing more channels, thereby improving the stereo sound experience for the occupant in that seat. 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.

[0034] The audio system is powered by the vehicle power supply system, which provides wired power to the main control module, occupant sensing module, UWB component, speaker 2, angle adjustment component, etc.

[0035] Example 2 The difference between this embodiment and Embodiment 1 is that: basically as shown in the appendix. Figure 6 and attached Figure 7 As shown, a linear reciprocating motion mechanism 4 is also installed on the roof. The reciprocating motion direction is along the vehicle axis and is also controlled by the angle control module 3. In this embodiment, the linear reciprocating motion mechanism 4 includes a servo motor 10 and a lead screw mechanism 9. The servo motor 10 drives the lead screw in the lead screw mechanism 9 to rotate, thereby driving the lead screw nut to reciprocate. A base plate 12 is installed on the lead screw nut, and a single degree of freedom adjustment structure 5 is installed on the base plate 12. The single degree of freedom adjustment structure 5 includes a fourth servo motor 11 (i.e., a driver) and an angle control module 3. The controlled UWB component 15 is integrated on the angle control module 3. The angle control module 3 also integrates a power interface 13 for connecting a power supply cable. A mounting bracket 502 is installed on the output end of the fourth servo motor 11, and the speaker 2 is installed on the mounting bracket 502.

[0036] By controlling the lead screw mechanism 9 to move the speaker 2 between the front and rear seats, the fourth servo motor 11 controls the speaker 2 to swing left and right. The speaker 2 is shared by the front, rear, left, and right seats, and can be flexibly used by the occupants of the four seats to provide a better stereo sound experience.

[0037] 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 wireless audio system, characterized in that: include: The main control module and multiple speakers, and: UWB components include a master UWB component and a controlled UWB component, with the master UWB component connected to the master control module; An angle adjustment assembly, which includes a driver and an angle control module, the angle control module being electrically connected to the controlled UWB assembly and the driver; The speaker is mounted on the working end of the driver; The occupant perception module is connected to the main control module.

2. The in-vehicle wireless audio system according to claim 1, characterized in that: The occupant perception module includes a CPD component or a visual recognition component.

3. The in-vehicle wireless audio system according to claim 1, 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.

4. The in-vehicle wireless audio system according to any one of claims 1 to 3, characterized in that: The driver includes a single-degree-of-freedom adjustment structure or a multi-degree-of-freedom adjustment structure with at least two degrees of freedom adjustment, and a speaker is installed on the working end of the single-degree-of-freedom adjustment structure or the multi-degree-of-freedom adjustment structure.

5. The in-vehicle wireless audio system according to claim 4, characterized in that: The multi-degree-of-freedom adjustment structure includes a first base, a rotating base, a first drive motor, a rotating shaft, and a second drive motor. The rotating base is mounted on the first base, the first moving motor is mounted on the first base and drives the rotating base to rotate, the rotating shaft is rotatably connected to the side of the rotating base away from the first base, the second drive motor is mounted on the rotating base and drives the first rotating shaft to rotate, and the speaker is mounted on the first rotating shaft.

6. The in-vehicle wireless audio system according to claim 4, characterized in that: The multi-degree-of-freedom adjustment structure includes a servo mounting bracket, a first servo, a second servo, and a connecting bracket. The servo mounting bracket is fixed to the side of the second servo, the connecting bracket is installed on the output end of the second servo, the first servo is installed on the connecting bracket, and the speaker is installed on the output end of the first servo.

7. The in-vehicle wireless audio system according to claim 4, characterized in that: The multi-degree-of-freedom adjustment structure includes a second base, a third base, and at least three telescopic cylinders. One end of each telescopic cylinder is hinged to the same side of the second base, and the other end of each telescopic cylinder is hinged to the side of the first base facing the second base.

8. The in-vehicle wireless audio system according to claim 4, characterized in that: The single-degree-of-freedom adjustment structure includes a third servo motor, and a mounting bracket is installed on the output end of the third servo motor.

9. The in-vehicle wireless audio system according to claim 1, characterized in that: It also includes a slide rail and a slide base. The slide base is slidably connected to the slide rail. A power structure that drives the slide base to slide on the slide rail is installed on the slide base. The power structure is electrically connected to the angle control module. An angle adjustment component is installed on the slide base.

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

11. The vehicle according to claim 10, characterized in that: Mid-to-high frequency speakers are installed on the center console, high frequency speakers are installed on the A-pillars and below the rear doors, and low frequency speakers are installed on both sides of the front doors.

12. The vehicle according to claim 10, characterized in that: Mid-to-high frequency speakers are installed on the B-pillar and C-pillar of the vehicle.

13. The vehicle according to any one of claims 10 to 12, characterized in that: A high-frequency speaker is installed on the roof, and a linear reciprocating motion mechanism is also installed on the roof. The high-frequency speaker is installed on the working end of the linear reciprocating motion mechanism.

14. The vehicle according to claim 13, characterized in that: The main control UWB component is installed on the vehicle's center console, while the controlled UWB component is integrated into the angle control module.

Images