In-vehicle sound field system and vehicle

Abstract

The utility model belongs to the field of audio signal transmission technology, concretely relates to a kind of vehicle-mounted sound field system and vehicle, including main control module and multiple loudspeakers and:UWB component, including main control UWB component and controlled UWB component, main control UWB component is connected with main control module;Position adjusting component, position adjusting component includes displacement mechanism and displacement control module, displacement control module is electrically connected with controlled UWB component and displacement mechanism;Loudspeaker is installed on the working end of displacement mechanism;Occupant sensing 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.

Description

Technical Field

[0001] This utility model belongs to the field of audio signal transmission technology, specifically relating to an in-vehicle sound field system and a 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 distributed 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," the 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 range of the sound field center is limited due to the number and location of the speakers. The movement of the occupants' heads will cause their heads (ears) to frequently deviate from the effective range of the sound field center, resulting in a significant reduction in the stereo effect. Utility Model Content

[0006] The present invention aims to provide an in-vehicle sound field system and vehicle to ensure the occupants' stereo sound experience while transmitting audio signals with high fidelity.

[0007] To achieve the above objectives, the present invention provides a vehicle-mounted sound field 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; A position adjustment assembly, comprising a displacement mechanism and a displacement control module, wherein the displacement control module is electrically connected to the controlled UWB assembly and the displacement mechanism; The loudspeaker is mounted on the working end of the displacement mechanism; 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 interception capability (1 nanosecond), 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 information. 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.

[0009] Due to the irregular shape and limited size of the vehicle's interior, speakers are usually fixed in a fixed position within the car. Since occupants sit in different seats, it cannot be guaranteed that they are in the center of the sound field for optimal sound quality. According to scientific research, when the human brain hears a sound, it prioritizes sounds arriving at the ears within 35ms as the sole source for determining the sound's location. Sounds arriving later are perceived as having lower loudness. This results in a situation where, even with speakers placed around the perimeter of the vehicle, the sound heard from the driver's side is always off-center to the left, and from the passenger's side to the right, indicating a misalignment of the sound field center.

[0010] In this solution, the occupant perception module senses the occupant's position within the vehicle interior and transmits this position information to the main control module via a UWB component. The main control module, after obtaining the occupant's position information from the occupant perception module, generates speaker displacement control information, calculates the appropriate position for the speaker (i.e., the displacement travel), and transmits this displacement control information to the displacement control module of the position adjustment component via the UWB component. The displacement control module controls the working end of the displacement mechanism to move a specified distance, ensuring that the speakers emitting sound around the occupant are distributed as evenly as possible on both sides of the occupant. Whether it's bass, midrange, or treble, the sound is transmitted to the occupant from both sides at nearly equal distances, preventing any sound field center deviation and ensuring a good stereo experience for the occupant.

[0011] 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 and repositionable, thereby further facilitating the adjustment of the sound field center.

[0012] Optionally, the main control UWB component includes multiple transceiver units, which are distributed and the distance between adjacent transceiver units is not less than 5 cm. The controlled UWB component is installed on the working end of the displacement mechanism, and at least one controlled UWB component is installed on each position adjustment component. Based on the characteristics of UWB technology, in addition to high-fidelity audio data transmission, UWB technology can also be used for positioning. In this solution, the UWB transceiver unit adopts 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, achieving a positioning accuracy of centimeter level. This solution, without relying on any other sensors, utilizes multiple transceiver units between the controlled UWB component and the main control UWB component to accurately locate the spatial position of the controlled UWB component. In other words, it can accurately locate the position of each speaker in the vehicle's interior space. This position information is then used to accurately and in real-time determine and calculate the distance between each speaker and the occupant, thereby controlling their displacement distance and preventing the occupant from experiencing a sound field center deviation.

[0013] 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.

[0014] 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.

[0015] Optionally, the displacement mechanism includes a linear motor, with a speaker mounted on the working end of the linear motor.

[0016] Optionally, the displacement mechanism includes a slide rail and a slide base, with the slide base slidably connected to the slide rail. A power structure is mounted on the slide base to drive the slide base to slide on the slide rail. The power structure is electrically connected to the displacement control module, and the speaker is mounted on the slide base. The slide rail is installed inside the vehicle, and the sliding of the slide base is controlled by controlling the power structure, thereby moving the speaker and adjusting the distance between the speaker and the occupant.

[0017] Optionally, a storage battery is also installed on the working end of the displacement mechanism. The storage battery is electrically connected to the displacement control module, the controlled UWB component, and the displacement mechanism. Using a storage battery to power the position adjustment component avoids the limitations imposed on the displacement mechanism by wiring harness power supply.

[0018] Optionally, the system also includes a wireless charging module, which comprises a charging unit and a sensing unit. The sensing unit is mounted on the working end of the displacement mechanism and electrically connected to the battery, while the charging unit is mounted on the vehicle and electrically connected to the vehicle's power supply system. When the working end of the displacement mechanism is stopped, the charging unit and the sensing unit of the wireless charging module can be positioned opposite each other to wirelessly charge the battery.

[0019] Optionally, it also includes an angle adjustment mechanism, which is mounted on the working end of the displacement mechanism, and the speaker is mounted on the working end of the angle adjustment mechanism. Since most speakers have a certain directionality in sound propagation, the speaker's orientation affects the sound propagation range. The loudness of the sound within the direction of sound propagation is higher than that outside the range. By adjusting the speaker's position using the position adjustment component and adjusting the speaker's orientation using the angle adjustment mechanism, it is easier to avoid the situation where the sound field center is off-center for the occupants.

[0020] Optionally, the angle adjustment mechanism includes a single-degree-of-freedom adjustment structure or a multi-degree-of-freedom adjustment structure with at least two degrees of freedom. A speaker is mounted on the working end of either 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 control the speaker's orientation.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Another aspect of this application is to provide a vehicle in which the aforementioned vehicle-mounted sound field system is installed.

[0026] Optionally, mid-to-high frequency speakers are installed on the dashboard, high frequency speakers are installed on the A-pillars and below the rear doors, and high frequency speakers are installed on both sides below the front doors.

[0027] Optionally, mid-to-high frequency speakers are installed on the B-pillars and C-pillars of the vehicle, and high frequency speakers are installed on the roof.

[0028] Optionally, the position adjustment assembly is mounted on the roof and located in the central area of ​​the roof. The roof provides a wider range of movement for the working end of the displacement mechanism, allowing both the front and rear seats to utilize the roof speakers.

[0029] Optionally, the master UWB component is mounted on the vehicle's center console, while the controlled UWB component is integrated into the displacement 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 displacement control module's capabilities to process the received digital signals. Attached Figure Description

[0030] 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 structure of the roof speaker and the linear reciprocating motion mechanism in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of the roof speaker and the linear reciprocating motion mechanism in Embodiment 2 of this utility model; Figure 4 This is a schematic diagram of the single-degree-of-freedom adjustment structure in Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the multi-degree-of-freedom adjustment structure in Embodiment 3 of this utility model; Figure 6 This is a schematic diagram of the multi-degree-of-freedom adjustment structure in Embodiment 4 of this utility model; Figure 7 This is a schematic diagram of the multi-degree-of-freedom adjustment structure in Embodiment 5 of this utility model; Figure 8 This is an interior perspective view of the vehicle in Embodiment 2 of this utility model; Figure 9 This is a control logic block diagram of the vehicle-mounted sound field system in Embodiment 1 of this utility model. Detailed Implementation

[0031] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: vehicle body 1, speaker 2, displacement control module 3, linear reciprocating motion mechanism 4, single-degree-of-freedom adjustment structure 5, third servo motor 501, mounting bracket 502, first multi-degree-of-freedom adjustment structure 6, first base 601, rotary 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, base plate 12, battery 13, transceiver unit 14, controlled UWB component 15, charging base 16, induction coil 17, linear motor 18.

[0032] Example 1 This embodiment is basically as follows: Figure 1 and attached Figure 9 As shown: A vehicle equipped with an in-vehicle sound field system includes a vehicle body 1, within which multiple speakers 2 are distributed, 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 below 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 is used for the input, output, storage, and calculation required by this sound field system. In this embodiment, the ECU system integrates an audio control system that controls the sound channels and sound effects, and this system is responsible for encoding and outputting the audio signals. All or part of the aforementioned speakers 2 may be equipped with position adjustment components. In this embodiment, the speaker 2 in the center of the rear seat roof is equipped with a position adjustment component. Each speaker 2 includes not only a horn but also a corresponding audio input and resolution circuit. After inputting audio information through this circuit, the horn can play the audio. This technology is mature and will not be elaborated here. Each speaker 2 has a unique ID within the sound field device.

[0033] A linear reciprocating motion mechanism 4 (i.e., a displacement mechanism) is installed on the roof, and the reciprocating motion is along the vehicle's axis. (See attached image.) Figure 2 As shown, in this embodiment, the linear reciprocating motion mechanism 4 is a linear motor 18, and the speaker 2 is mounted on the slider of the linear motor 18. A battery 13 is also installed on the working end of the linear motor 18, and the battery 13 is electrically connected to the displacement control module 3, the controlled UWB component 15, and the displacement mechanism. A charging base 16 for a wireless charging module is installed near the end of the linear motor 18, and the induction coil 17 of the wireless charging module is installed on the working end of the displacement mechanism and electrically connected to the battery 13. When the slider of the linear motor 18 stops at the end, the charging base 16 and the induction coil 17 are aligned, and the battery 13 can be wirelessly charged.

[0034] The displacement 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, the displacement control module 3 is an automotive-grade MCU. After receiving control information, the displacement control module 3 can control the displacement stroke and direction of the displacement mechanism, thereby achieving precise control of the position of each speaker 2. In other embodiments, linear gear racks, lead screw mechanisms 9, electric cylinders, and other control mechanisms can also be used to achieve single-degree-of-freedom stroke adjustment.

[0035] As attached Figure 9 As shown, the main control module obtains audio signals from each speaker 2 from the audio control system and generates control information, which is then transmitted through a UWB component. The UWB component includes a main control UWB component located on the central control panel and a separately controlled UWB component 15 for each speaker 2. The controlled UWB component 15 is integrated into the displacement control module 3. Both the main control UWB component 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 information to the ID of the speaker 2 at that location (the ID corresponding to speaker 2 is A1) and converts it into a digital signal. That is, the digital signal contains the ID information of speaker 2, control information, and audio information. Then, the main control UWB component broadcasts the aforementioned digital signal through the antenna. The controlled UWB component 15 of the speaker 2 receives digital signals, then converts and parses them to obtain ID information, control information, and audio information. It plays only the audio information corresponding to the ID of the speaker 2 and outputs the control information corresponding to the ID to the displacement control module 3 of the position adjustment component corresponding to the speaker 2 to realize the position adjustment of the speaker 2.

[0036] In this embodiment, the main control UWB component includes three transceiver units 14, which are distributed and capable of transmitting and receiving UWB signals. One transceiver unit 14 is installed in the center of the control panel, and the other two are located at opposite ends of the control panel. A controlled UWB component 15 is installed on the working end of the displacement mechanism (i.e., the slider of the linear motor 18 in this embodiment), and at least one controlled UWB component 15 is installed on each position adjustment component. Based on the characteristics of UWB technology, in addition to high-fidelity audio data transmission, UWB technology can also be used for positioning, with positioning accuracy currently typically at the centimeter level. This solution, without relying on any other sensors, utilizes the controlled UWB component 15 to communicate with multiple transceiver units 14 of the main control UWB component. This allows for accurate positioning of the controlled UWB component 15, which in turn allows for accurate positioning of each speaker 2 within the vehicle's interior space. This position information is then used to accurately and in real-time determine and calculate the distance between each speaker 2 and the occupant, thereby controlling the distance and preventing the occupant from experiencing a sound field center deviation.

[0037] In this embodiment, when the occupant is located Figure 1 When the left-hand seat is in the car, the speaker 2 in the middle of the roof is used to build the right-hand channel, while the speakers 2 located on the right-hand door and pillar can build other channels to output more channels of sound with different loudness, such as simulating distant insect chirping, bird calls, wind and rain sounds, echoes, etc., simulating the sound effects of an open field or an indoor hall.

[0038] 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 through sensor data such as 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 through sensor data such as millimeter-wave radar, cameras, or seat pressure sensors, then, according to the needs of stereo sound effects, the direction and position 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.

[0039] The sound field system is powered by the vehicle power supply system, which provides wired power to the main control module, main control UWB component, occupant sensing module, wireless charging module, etc.

[0040] Example 2 The difference between this embodiment and Embodiment 1 is as follows: (See attached diagram) Figure 3 As shown, the linear reciprocating motion mechanism 4 equipped with the speaker 2 in the center of the rear seat roof includes a servo motor and a lead screw mechanism 9. The servo motor drives the lead screw in the lead screw mechanism 9 to rotate, thereby causing the lead screw nut to reciprocate. A base plate 12 is mounted on the lead screw nut, and a single-degree-of-freedom adjustment structure 5 is mounted on the base plate 12. In addition, the two high-frequency speakers 2 on the left and right sides of the rear seat roof (corresponding IDs A2 and A3) are also equipped with this single-degree-of-freedom adjustment structure 5, as shown in the attached diagram. Figure 4 As shown, the single-degree-of-freedom adjustment structure 5 includes a third servo motor 501 (there are three in total, namely B1, B2 and B3) and an angle control module (in this embodiment, the displacement control module 3 is shared). The controlled UWB component 15 is integrated on the angle control module. In this embodiment, the angle control module, the controlled UWB component 15 and the servo motor are also powered by the battery 13. A mounting bracket 502 is installed on the output end of the third servo motor 501, and the speaker 2 is installed on the mounting bracket 502.

[0041] By controlling the lead screw mechanism 9 to move the speaker 2 between the front and rear seats, the speaker 2 can be shared by both left and right seats, allowing for flexible allocation of the speaker 2 among the four seats in all directions, providing a better stereo experience. Furthermore, thanks to the single-degree-of-freedom adjustment structure 5, as shown in the attached... Figure 8 As shown, the three speakers 2 on the left, center and right of the roof of the rear seats can also be swung to adjust the orientation of the speakers 2, thereby adjusting the center of the sound field and further ensuring the stereo experience of the passengers.

[0042] Example 3 In this embodiment, the first multi-degree-of-freedom adjustment structure 6 replaces the single-degree-of-freedom adjustment structure 5 mounted on the substrate 12, as shown in the attached figure. Figure 5As 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.

[0043] Example 4 In this embodiment, as shown in the appendix Figure 6 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.

[0044] Example 5 In this embodiment, as shown in the appendix Figure 7 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 telescopic cylinders 802 allows the third base 803 to tilt in different directions, thereby controlling the orientation of the speaker 2.

[0045] 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.

[0046] 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 sound field system, characterized by: include: The main control module and multiple speakers, as well as: UWB components include a master UWB component and a controlled UWB component, with the master UWB component connected to the master control module; A position adjustment assembly, comprising a displacement mechanism and a displacement control module, wherein the displacement control module is electrically connected to the controlled UWB assembly and the displacement mechanism; The loudspeaker is mounted on the working end of the displacement mechanism; The occupant perception module is connected to the main control module.

2. The in-vehicle sound field system of claim 1, wherein: 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; the controlled UWB component is installed on the working end of the displacement mechanism, and at least one controlled UWB component is installed on each position adjustment component.

3. The in-vehicle sound field system of claim 1, wherein: The occupant perception module includes a CPD component or a visual recognition component.

4. The in-vehicle sound field system of claim 3, wherein: 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.

5. The in-vehicle sound field system of claim 2, wherein: The displacement mechanism includes a linear motor, and a speaker is mounted on the working end of the linear motor.

6. The in-vehicle sound field system of claim 2, wherein: The displacement mechanism 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 displacement control module. A speaker is installed on the slide base.

7. The in-vehicle sound field system of claim 2, wherein: A battery is also installed on the working end of the displacement mechanism, and the battery is electrically connected to the displacement control module, the controlled UWB component, and the displacement mechanism.

8. The in-vehicle sound field system of claim 7, wherein: It also includes a wireless charging module, which includes a charging unit and a sensing unit. The sensing unit is installed on the working end of the displacement mechanism and is electrically connected to the battery. The charging unit is installed on the vehicle and is electrically connected to the vehicle's power supply system.

9. The in-vehicle sound field system of claim 1, wherein: It also includes an angle adjustment mechanism, which is installed on the working end of the displacement mechanism, and a speaker is installed on the working end of the angle adjustment mechanism.

10. The in-vehicle sound field system of claim 9, wherein: The angle adjustment mechanism includes a single-degree-of-freedom adjustment structure or a multi-degree-of-freedom adjustment structure with at least two degrees of freedom, and a loudspeaker is installed on the working end of the single-degree-of-freedom adjustment structure or the multi-degree-of-freedom adjustment structure.

11. The in-vehicle sound field system of claim 10, wherein: 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.

12. The in-vehicle sound field system of claim 10, wherein: 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.

13. The in-vehicle sound field system of claim 10, wherein: 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.

14. The in-vehicle sound field system of claim 13, wherein: 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.

15. A vehicle characterised by: The vehicle is equipped with a vehicle-mounted sound field system as described in any one of claims 1 to 14.

16. The vehicle of claim 15, characterized in that: Mid-to-high frequency speakers are installed on the dashboard, high frequency speakers are installed on the A-pillars and below the rear doors, and high frequency speakers are installed on both sides of the front doors.

17. The vehicle of claim 16, characterized in that: Mid-to-high frequency speakers are installed on the B-pillars and C-pillars of the vehicle, and high frequency speakers are installed on the roof.

18. The vehicle of claim 17, characterized in that: The position adjustment component is mounted on the roof and located in the central area of ​​the roof.

19. The vehicle of claim 18, 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 displacement control module.

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