Integrated excitation automobile seat system, control system and control method

Abstract

The invention discloses an integrated excitation automobile seat system, a control system and a control method. The integrated excitation automobile seat system comprises a seat, the signal input module is used for receiving a multi-source analog signal and preprocessing the multi-source analog signal into a full-frequency digital signal; the processing module is used for performing frequency division processing on the full-frequency digital signal and matching and restoring a preset sound effect; the power driving module is used for receiving, converting and amplifying the frequency division processing signal and routing the received, converted and amplified frequency division processing signal to the hybrid exciter; and the hybrid exciter is arranged in the seat, is used for receiving the driving electric signal and can convert the driving electric signal into mechanical vibration and audible sound signals.

Description

Technical Field

[0001] This invention relates to the field of automotive seat system technology, specifically to an integrated excitation automotive seat system and its control method. Background Technology

[0002] In the field of automotive cockpit acoustic-vibration interaction systems, to achieve synergy between acoustic output and vibration feedback, existing technologies generally adopt a separate hardware architecture of "sound generation + vibration". This architecture and its supporting control scheme have significant shortcomings in terms of system integration, frequency domain coverage, and user experience consistency, making it difficult to meet the automotive cockpit's requirements for highly immersive and reliable acoustic-vibration interaction. Specific problems are as follows:

[0003] I. Technical limitations of existing discrete hardware architectures:

[0004] Current mainstream automotive cockpit audio-visual interaction systems employ a three-part hardware layout: a full-range speaker is independently placed in the headrest for audio output; a full-range vibration speaker is embedded in the seat back to provide both acoustic sound generation and ultra-low frequency vibration feedback; and an independent haptic vibrator is superimposed on the seat base to enhance the vibration effect. To drive this split structure, the system relies on an external crossover amplifier to split the input audio signal into three paths: a full-range acoustic signal, a bass vibration signal, and a hardware switch control signal, which are then transmitted to their respective hardware components.

[0005] This architecture has the following core problems:

[0006] The system has high redundancy, which increases costs and failure rates: At the hardware level, three independent components need to be deployed simultaneously: headrest speakers, backrest vibration speakers, and base body-sensing oscillators. In addition, they need to be matched with crossover power amplifiers and multiple signal transmission lines, which leads to a significant increase in the number of hardware components. This not only drives up the mass production cost, but the complex wiring and multi-component coordination also significantly increase the probability of failure during later use, which is not conducive to large-scale application.

[0007] Incomplete frequency domain coverage and weak haptic feedback: Vibration feedback is limited to the ultra-low frequency band, and it cannot effectively capture and provide feedback on vibration signals in the mid-to-high frequency range (such as instrument resonance in music, mid-to-high frequency mechanical vibration in film and television scenes, etc.), causing users to be unable to perceive the details of vibration across the entire frequency range. At the same time, the full-range vibration speaker embedded in the backrest is limited by its structure and power, and its low-frequency vibration impact is far weaker than that of a dedicated haptic vibrator (for example, in a film explosion scene, it can only produce a slight buzzing vibration, which cannot simulate a real impact), further weakening the user's sense of presence and immersion.

[0008] II. Performance defects of existing control algorithms:

[0009] To adapt to the aforementioned discrete hardware architecture, existing technologies have proposed multi-dimensional audio zone routing control schemes. For example, they use sound source classification algorithms to identify different frequency band components in audio signals, combine dynamic mixing technology to achieve audio allocation for multiple hardware devices, and introduce multi-zone linkage control and acceleration compensation mechanisms to optimize the sound-vibration coordination effect.

[0010] However, this type of algorithm has a key performance bottleneck:

[0011] Excessive computational load and significant response delay: The algorithm needs to handle multiple tasks simultaneously, such as sound source identification, dynamic mixing, multi-zone collaborative control, and acceleration compensation. The massive amount of data processing leads to system response delay, which manifests as a lack of synchronization between the in-cabin visuals, acoustic output, and vibration feedback (e.g., the visual signal of a vehicle collision has appeared in a movie scene, but the vibration feedback is delayed by more than 0.5 seconds), severely disrupting the user's immersive experience.

[0012] Poor multimodal consistency: Due to insufficient precision in the algorithm's coordinated control of multiple hardware devices, deviations easily occur in the phase and intensity matching of acoustic and vibration signals. For example, a low-frequency audio signal may be output, but the corresponding vibration feedback intensity may be insufficient or ahead, making it impossible to achieve an integrated acoustic-vibration interaction effect.

[0013] III. Examples of specific defects in existing technical solutions:

[0014] The music chair and its control method disclosed in CN115804509A propose a separate hardware structure of "sound generation + vibration," employing an independent full-range speaker in the headrest, a full-range vibration speaker embedded in the backrest, and a haptic vibrator superimposed on the base. The vibrator position is optimized through pressure distribution to reduce the feeling of foreign objects. However, this solution fails to address the inherent flaws of the separate architecture: the arrangement of three types of independent hardware still results in system redundancy, the insufficient low-frequency impact of the backrest vibration speaker remains unresolved, and mid-to-high frequency haptic feedback is lacking, limiting its practicality.

[0015] The vehicle audio control method disclosed in CN115967896A proposes a multi-dimensional sound zone routing algorithm to solve the multi-sound zone crosstalk problem through scene-based and sound zone-based fine-grained control, and introduces automotive-grade dynamic gain compensation. However, this algorithm needs to handle real-time sound source identification, mixing control, and multi-zone collaboration simultaneously, resulting in high computational complexity. It still cannot avoid response delay, leading to poor multimodal consistency of acoustics and vibration, and failing to meet the real-time interaction requirements of the automotive cabin.

[0016] In summary, the existing "sound generation + vibration" separate architecture and supporting control scheme have insurmountable defects in terms of system integration, full-frequency haptic coverage, and real-time responsiveness. There is an urgent need for a highly integrated, full-frequency coverage, and timely response integrated sound and vibration solution to break through the current technical bottlenecks and improve the user experience and industrial value of sound and vibration interaction in automotive cabins. Summary of the Invention

[0017] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide an integrated excitation car seat system and its control method that features high integration, full-frequency coverage, and timely response.

[0018] To achieve this objective, the integrated excitation car seat system designed in this invention includes a seat; a signal input module for receiving multi-source analog signals and preprocessing them into full-frequency digital signals; a processing module for performing frequency division processing, matching, and restoring preset sound effects on the full-frequency digital signals; a power drive module for receiving, converting, and amplifying the frequency-divided processed signals and routing the received, converted, and amplified frequency-divided processed signals to the hybrid exciter; and a hybrid exciter arranged within the seat for receiving drive electrical signals and converting the drive electrical signals into mechanical vibration and audible sound signals.

[0019] Furthermore, the integrated incentive car seat system also includes an airborne acoustic exciter and / or a somatosensory exciter disposed within the seat.

[0020] Furthermore, the integrated excitation car seat system also includes a feedback acquisition module for acquiring the actual audible sound signal received by the user and the actual mechanical vibration felt by the user, comparing the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration respectively, and determining whether the sound and vibration are synchronized. The processing module can receive the feedback information from the feedback acquisition module and optimize the parameters of the full-frequency signal.

[0021] Furthermore, the arrangement of the airborne sound exciter, the somatosensory exciter, and the hybrid exciter within the seat satisfies a target function relationship between the exciter position and the intensity of human perception. The target function expression for the exciter position and the intensity of human perception is as follows:

[0022] To maximize the human body's comprehensive perception of sound and tactile sensation, β audio (U) and β haptic (U) is the adaptive weights combined with the user feature vector U, which are 0.6 + δ u and 0.4-δ u δ u ∈[-0.1,0.1];

[0023] To minimize crosstalk between exciters, a crosstalk physical model is used. Calculate, where k is the coupling coefficient, f i For exciter-related parameters, d ijLet be the distance between exciter i and exciter j, γ be the penalty coefficient, γ∈[0.2,0.5], and d be the mechanical crosstalk hard constraint. ij ≥80+∈, ∈≥0, acoustic sensitive area constraint is Where, x i Let x be the spatial location vector of the i-th exciter. ear The location is the ear, k is the attenuation coefficient, and the tactile sensitive area is constrained to S. body,i =α·T(x i ), α·T(x i )≥T min , T(x i ) represents muscle thickness, T min Let α be the muscle thickness threshold, α be the correlation coefficient, and the neural density avoidance constraint be ||x||. i -x nerve ||≥R safe x nerve R is the location vector of the dense neural region. safe The safe distance between the exciter and the densely packed neural area;

[0024] The constraint handling rule is: if d ij If the value is less than 80, the solution is invalid. If multiple solutions satisfy the constraints, they are sorted in descending order of objective function value, and the solution with the larger objective function value is selected first.

[0025] Furthermore, there are multiple hybrid exciters arranged at 50%-60% of the height of the seat back. The distance between the hybrid exciter and the auricle of the 50th percentile human body is no more than 150mm, and the distance between the hybrid exciter and the scapula of the 50th percentile human body is no more than 40mm. The installation depth of the hybrid exciter in the seat back is 20-30mm.

[0026] Furthermore, the present invention also provides a control system based on the aforementioned integrated excitation automotive seat system, including a signal input module, a processing module, a power drive module, and a feedback acquisition module;

[0027] The signal input module is used to receive multi-source analog signals and preprocess them into full-frequency digital signals.

[0028] The processing module is used to perform frequency division processing, matching, and restoration of preset sound effects on the full-frequency digital signal;

[0029] The power drive module is used to receive, convert, and amplify the frequency division processing signal and route the received, converted, and amplified frequency division processing signal to the hybrid exciter and / or the air sound exciter and / or the sonic exciter.

[0030] The feedback acquisition module is used to acquire the actual audible sound signal received by the user and the actual mechanical vibration felt by the user, compare the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration respectively, and determine whether the sound and vibration are synchronized.

[0031] The processing module can receive feedback information from the feedback acquisition module and optimize the parameters of the full-frequency signal.

[0032] Furthermore, the signal input module includes an analog-to-digital converter (ADC) for converting the multi-source analog signal into the full-frequency digital signal.

[0033] Furthermore, the processing module includes a frequency divider processor and an adaptive controller; the frequency divider processor is used to divide the full-frequency digital signal into frequencies, and the adaptive controller is used to match and restore preset sound effects.

[0034] Furthermore, the method for frequency division processing of the full-frequency digital signal includes: extracting audible sound components with frequencies greater than 50Hz through an acoustic filter, and extracting mechanical vibration components with frequencies from 0.1Hz to 500Hz through a haptic filter.

[0035] Furthermore, the method for matching and restoring preset sound effects includes: for scenarios including music, video, and control commands, pre-setting multiple gain-phase curves, loading the corresponding gain-phase curves according to the preset sound effect mode, and restoring the preset sound effects in real time.

[0036] Furthermore, the power drive module includes an analog-to-digital converter, a digital signal processor, and a power driver; the analog-to-digital converter is used to receive the frequency division processing signal, the digital signal processor is used to convert the frequency division processing signal, and the power driver is used to amplify the converted frequency division processing signal.

[0037] Furthermore, the method for converting the frequency-division processed signal includes: frequency-division signal format adaptation conversion, frequency band-specific parameter mapping conversion, cross-frequency band phase calibration conversion, coupling coefficient weighting conversion, and drive command encoding conversion.

[0038] Furthermore, the method for frequency division signal format adaptation and conversion includes: receiving the frequency division processing signal transmitted by the analog-to-digital converter, identifying the frequency division band identifier and amplitude reference of the signal, converting the frequency division processing signal into a standardized digital signal format recognizable by the digital signal processor, and filtering format noise.

[0039] Furthermore, the method for frequency band-specific parameter mapping conversion includes: adjusting the parameter mapping according to the signal characteristics of different frequency bands; for acoustic frequency division processing signals, mapping their digital amplitude to duty cycle parameters adapted to PWM waveform generation to generate frequency control signals for PWM waveforms; for vibration frequency division processing signals, mapping their digital amplitude to voltage amplitude parameters of high-voltage pulses to generate pulse width control signals.

[0040] Furthermore, the cross-band phase calibration conversion method includes: for the overlapping frequency band of the acoustic frequency division processing signal and the vibration frequency division processing signal, calculating the time delay difference between the two signals through a cross-correlation algorithm, and performing a time-domain translation conversion on the digital sequence of the vibration frequency division processing signal so that the phase difference between the two signals in the overlapping frequency band is controlled within a set error range.

[0041] Furthermore, the method for weighted conversion of coupling coefficients includes: according to the acoustic-vibration coupling requirements, performing amplitude weighted conversion on the acoustic frequency division processing signal and the vibration frequency division processing signal in the overlapping frequency band; multiplying the digital amplitude of the acoustic frequency division processing signal by its coupling coefficient to obtain the contribution component of the acoustic frequency division processing signal to vibration coupling; multiplying the digital amplitude of the vibration frequency division processing signal by its coupling coefficient to obtain the contribution component of the vibration frequency division processing signal to acoustic coupling; and superimposing the weighted acoustic frequency division processing signal and the vibration frequency division processing signal with their respective original frequency division processing signals to generate an acoustic driving digital signal and a vibration driving digital signal.

[0042] Furthermore, the method for converting the drive command encoding includes: encoding the frequency-divided digital signal after format adaptation, parameter mapping, phase calibration, and weighting into a drive command format recognizable by the power driver, and adding an error check code.

[0043] Furthermore, the method for collecting the actual audible sound signal received by the user and the actual mechanical vibration felt by the user, comparing the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration respectively, and determining whether the sound and vibration are synchronized includes: collecting and comparing the actual audible sound signal with the expected signal, collecting and comparing the actual mechanical vibration signal with the expected signal, and judging the sound and vibration synchronization performance.

[0044] Furthermore, the method for comparing the actual audible sound signal with the expected signal includes: receiving the audible sound signal actually perceived by the user in real time through a microphone, converting the sound pressure signal into an analog electrical signal; filtering out high-frequency noise in the analog electrical signal, amplifying the analog electrical signal to a voltage range compatible with the analog-to-digital converter; converting the analog electrical signal into a discrete digital signal, performing 512-point FFT processing on the digitized acoustic signal, converting the time-domain signal into a frequency-domain signal, extracting the amplitude values ​​of each frequency point within the set frequency band to form actual acoustic frequency response data, and marking the processing timestamp; retrieving the preset expected audible sound frequency response curve, and calculating and outputting the difference between the actual acoustic frequency response amplitude and the expected frequency response amplitude point by point at the same frequency point.

[0045] Furthermore, the method for comparing the actual mechanical vibration signal acquisition with the expected signal includes: sensing the mechanical vibration actually felt by the user in real time through an accelerometer, converting the vibration acceleration signal into an analog electrical signal, filtering out low-frequency drift noise of the analog electrical signal, and removing high-frequency interference; calibrating the signal amplitude to the input range of the analog-to-digital converter, and completing the digital conversion at a sampling rate of a set frequency to obtain a vibration digital signal; performing a 512-point FFT operation on the vibration digital signal to generate a vibration acceleration spectrum of a set frequency band, extracting the amplitude values ​​at each frequency point, identifying and marking the resonance peaks in the spectrum, and recording relevant data and time stamps; retrieving the preset expected vibration acceleration spectrum, and calculating and outputting the difference between the actual vibration acceleration amplitude and the expected amplitude at each frequency point.

[0046] Furthermore, the method for judging the acoustic-vibration synchronization performance includes: synchronously triggering the microphone and accelerometer to sample via timestamp, and collecting actual audible sound signals and actual mechanical vibration signals respectively; performing 512-point FFT processing on the two signals to extract the phase angle of each frequency point in the overlapping frequency band; calculating the phase difference point by point, retrieving the preset acoustic-vibration synchronization phase standard, and calculating and outputting the time delay compensation amount.

[0047] Furthermore, the method for receiving feedback information from the feedback acquisition module and optimizing the parameters of the full-frequency signal includes: gain deviation compensation of the acoustic channel, gain balance adjustment of the left and right channels of the vibration channel, and acoustic-vibration phase delay compensation of the hybrid channel.

[0048] Furthermore, the present invention also provides a control method for a control system based on the aforementioned integrated excitation automotive seat system, comprising the following steps:

[0049] It receives multi-source analog signals and preprocesses them into full-frequency digital signals.

[0050] The full-frequency digital signal is divided, matched, and restored to the preset sound effect;

[0051] Receive, convert, and amplify the frequency-division processed signal and route the received, converted, and amplified frequency-division processed signal to the hybrid exciter and / or the air acoustic exciter and / or the sonic exciter;

[0052] The system collects the actual audible sound signal received by the user and the actual mechanical vibration felt by the user. It then compares the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration, and determines whether the sound and vibration are synchronized.

[0053] The system receives feedback information from the feedback acquisition module and optimizes the parameters of the full-frequency signal.

[0054] Furthermore, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method.

[0055] The beneficial effects of this invention are:

[0056] I. System architecture innovation to solve integration and cost issues

[0057] By setting up a hybrid exciter, the traditional "sound generation + vibration" separate hardware architecture is broken. The hybrid exciter can output audible sound and mechanical vibration simultaneously, reducing the use of multiple independent components such as independent headrest speakers, full-range vibration speakers in the backrest, and body-sensing vibrators in the base. This reduces the number of hardware components and the need for matching crossover amplifiers and multiple signal transmission lines, thereby reducing system redundancy and mass production costs; it also simplifies wiring and multi-component coordination, reduces the probability of failure, and facilitates large-scale application.

[0058] II. Full-frequency coverage enhances haptic feedback

[0059] Precise frequency division processing: The processing module extracts audible sound components with frequencies greater than 50Hz through an acoustic filter and mechanical vibration components from 0.1Hz to 500Hz through a haptic filter, performing fine division and processing of the full-frequency signal. Hybrid exciter assistance: The hybrid exciter can output mid-to-high frequency vibration signals, compensating for the lack of high-frequency vibration feedback (such as musical instrument resonance, mid-to-high frequency mechanical vibration, etc.) in traditional solutions. Simultaneously, combined with a haptic exciter and an airborne sound exciter, it can enhance the impact of low-frequency vibrations (such as the realistic impact of explosion scenes in movies), allowing users to perceive vibration details across the entire frequency range and improving the sense of presence and immersion.

[0060] III. Low latency and high synchronization enhance user experience.

[0061] Computational Load Optimization: Compared to traditional multi-dimensional sound zone routing control algorithms, the signal processing flow of this invention is simpler, reducing the high computational load caused by parallel multitasking such as sound source classification and dynamic mixing, lowering system response latency, and avoiding asynchrony between visual and acoustic output and vibration feedback (such as the delay between visual signals and vibration feedback in film and television collisions). Feedback and Optimization Closed Loop: The feedback acquisition module collects actual audible sound and mechanical vibration signals and compares them with the expected signals. The processing module optimizes parameters based on the feedback (such as acoustic channel gain deviation compensation, vibration channel left and right balance adjustment, sound and vibration phase delay compensation, etc.) to ensure that the acoustic and vibration signals match in phase and intensity, realize integrated sound and vibration interaction, and improve multimodal consistency.

[0062] IV. Scientifically designed layout, conforming to human perception

[0063] The hybrid exciter is positioned at 50%-60% of the seat back height, no more than 150mm from the 50th percentile human auricle and no more than 40mm from the scapula, with an installation depth of 22-26mm. Combining the exciter position with the objective function of human perception intensity (considering constraints such as acoustic / somatosensory sensitive areas, crosstalk, and avoidance of densely neural areas), the exciter placement ensures that it conforms to the human acoustic and somatosensory perception areas while minimizing crosstalk through constraints, further enhancing user immersion and safety.

[0064] In summary, this invention innovates in hardware architecture, signal processing, layout design, and other aspects, achieving a low-cost, low-latency, and highly reliable immersive automotive cockpit sound and vibration interaction experience. Attached Figure Description

[0065] To more clearly illustrate the technical solutions of the embodiments disclosed in this invention, the accompanying drawings of the embodiments will be briefly described below. These drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0066] Figure 1 This is an architectural diagram of the integrated excitation car seat system designed according to the present invention;

[0067] Figure 2 This is a front view of the actuator arrangement structure of the seat in this invention;

[0068] Figure 3 This is a side view of the actuator arrangement structure of the seat in this invention;

[0069] Figure 4 This is a timing diagram of the control method for the integrated excitation automotive seat system designed in this invention.

[0070] Among them, 1—airborne sound exciter, 2—body sensory exciter, and 3—hybrid exciter. Detailed Implementation

[0071] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0072] Definition of the noun:

[0073] Airborne sound exciter (converts electrical signals into audible sound signals, which are then transmitted to the human ear):

[0074] Structural Composition: Based on the acoustic-vibration interaction scenario of automotive cabins and the general technical architecture of exciters, airborne acoustic exciters typically consist of a signal interface module, an electromagnetic drive unit, lightweight vibration-generating components (such as conical or planar diaphragms), and an acoustic cavity support structure. Its core drive unit includes a permanent magnet, a voice coil, and an elastic suspension system. The diaphragm is often made of lightweight rigid materials (such as paper composite films or metal films). The overall structure is adaptable to embedded installation requirements in seat headrests or cabin interiors, with a compact size and vibration-resistant design.

[0075] Function: As a dedicated output device for acoustic signals, its core function is to convert the high-frequency electrical signals (typically audible frequencies above 50Hz) transmitted by the power drive module into clear and uniform airborne sound signals, providing users with an immersive audio experience. In automotive seat systems, it needs to accurately reproduce audible sound information such as music, movie sound effects, and navigation voice, and must match the characteristics of the cabin acoustic environment to avoid sound field distortion or crosstalk.

[0076] Principle: Following the conversion logic of "electric-magnetic-mechanical-acoustic energy," it first receives a format-adapted and amplified digital acoustic drive signal through a signal interface. The voice coil within the drive unit vibrates in the magnetic field formed by the permanent magnet, according to the frequency and amplitude of the electrical signal. The vibration of the voice coil drives the connected lightweight diaphragm to vibrate synchronously. The diaphragm compresses and disturbs the surrounding air medium, forming compression and sparsity waves, thus generating an audible sound signal that can be perceived by the human ear. Similar to the principle of traditional loudspeakers, its diaphragm design and installation method are better suited to the space constraints of a car cabin. The uniformity of sound field coverage can be improved by optimizing the diaphragm curvature and acoustic cavity parameters.

[0077] Somatosensory exciters (convert electrical signals into mechanical vibrations, which are then transmitted through contact with the human skeleton or skin to deliver vibrational energy):

[0078] Structural Composition: Focusing on low-frequency vibration feedback requirements, the somatosensory exciter mainly consists of a high-voltage drive module, a permanent magnet / piezoelectric vibration unit, a mechanical transmission base, and a buffer protection structure. The core of the vibration unit includes an excitation coil, a vibrating mass block (inertial block), and an elastic reset element. The transmission base is made of high-rigidity metal or engineering plastic and is rigidly connected to the frame of the seat back and base. Simultaneously, a buffer layer reduces ineffective vibration transmission to other parts of the cabin. Some solutions (such as the sonic vibrator derivative design mentioned in CN207236962U) will add a frequency adjustment module to adapt to multi-frequency vibration requirements.

[0079] Function: Specifically designed to convert low-frequency electrical signals (typically 0.1Hz–500Hz) into mechanical vibrations that can be perceived by the human body. Its core function is to recreate scene-specific tactile feedback, such as the impact of an explosion in a movie, the bumpy feeling of a vehicle driving on a road, or the low-frequency rhythmic vibrations of music. It must ensure the vibration intensity matches the scene, while avoiding the foreign body sensation or discomfort caused by high-frequency vibrations, and must meet automotive-grade reliability requirements (such as resistance to high and low temperatures and anti-aging properties).

[0080] Principle: Energy conversion is achieved based on inertial vibration or piezoelectric effect: When the vibration drive signal (mostly a high-voltage pulse signal) output by the power drive module is received, the excitation coil generates an alternating magnetic field, which interacts with the permanent magnet to drive the vibrating mass block to perform reciprocating mechanical motion; the inertial vibration of the mass block is transmitted to the seat surface through the conduction base, and then sensed by the skin and muscles of the human body contact points (such as the lower back and buttocks), and converted into a somatosensory signal. For signals in overlapping frequency bands (such as 50Hz–500Hz), a dedicated parameter mapping algorithm is used to convert the digital amplitude into the voltage parameters of the high-voltage pulse, ensuring a linear correspondence between the vibration intensity and the signal amplitude, while real-time calibration of the vibration amplitude is achieved through accelerometer feedback.

[0081] Hybrid exciter (or oscillator, a single hardware component that converts electrical signals into both mechanical vibrations and audible sound signals, supporting full-range vibration audio):

[0082] Structural Composition: As the core component of the "acoustic-vibration integration," the hybrid exciter adopts an integrated design, mainly consisting of a dual-mode drive control unit, a composite vibration assembly (including a high-frequency sound-generating diaphragm and a low-frequency inertial vibration block), a shared mounting bracket, and an acoustic-vibration isolation layer, as described in patent CN 119676619 A. In the composite vibration assembly, the high-frequency sound-generating diaphragm and the haptic vibration unit are coupled through elastic connectors. The mounting bracket is adapted to a position of 50%-60% of the seat back height (corresponding to the sensory sensitive areas of the human shoulder blade and auricle), with the installation depth controlled at 20-30mm to balance sound generation efficiency and vibration transmission effect. The acoustic-vibration isolation layer uses damping material to avoid mutual interference between high-frequency sound generation and low-frequency vibration.

[0083] Function: To achieve "synchronous integration of audible sound output and mechanical vibration feedback", the core functions include: while outputting audible sound signals above 50Hz, simultaneously generating mechanical vibrations from 0.1Hz to 500Hz; adapting corresponding gain-phase curves for different scenarios such as music and film to ensure consistency in intensity and phase between acoustic and vibration signals; and maximizing the overall perceived intensity of sound vibration by optimizing the installation position (e.g., distance from the auricle ≤150mm, distance from the scapula ≤40mm).

[0084] Principle: The system integrates a dual conversion mechanism of airborne sound excitation and haptic excitation, while achieving coordinated output through cross-band calibration. Signal Distribution and Driving: After receiving the full-frequency signal processed by frequency division, the dual-mode drive unit directs the high-frequency component (>50Hz) to the sound-generating diaphragm drive circuit and the low-frequency component (0.1Hz–500Hz) to the vibration unit drive circuit. Dual-mode Energy Conversion: The high-frequency signal drives the lightweight diaphragm to vibrate and generate airborne sound, while the low-frequency signal drives the inertial mass block to vibrate and generate mechanical vibration. The two are physically coupled through a composite vibration component. Synchronous Calibration: For the overlapping frequency band of 50Hz–500Hz, the time delay difference between the sound and vibration signals is calculated using a cross-correlation algorithm. The vibration signal is then time-domain shifted to control the phase difference within a set error range. Simultaneously, through weighted conversion of the coupling coefficient, the mutual contribution components of the sound and vibration signals are superimposed, ultimately achieving a synchronized output effect integrating sound and vibration.

[0085] Example 1

[0086] A specific embodiment of an integrated stimulating automotive seat system is provided:

[0087] like Figure 1 As shown in Figure 3, the integrated excitation car seat system includes a seat; a signal input module for receiving multi-source analog signals and preprocessing them into full-frequency digital signals; a processing module for performing frequency division processing, matching, and restoring preset sound effects on the full-frequency digital signals; a power drive module for receiving, converting, and amplifying the frequency-divided processed signals and routing the received, converted, and amplified frequency-divided processed signals to the air-sound exciter 1, the haptic exciter 2, and the hybrid exciter 3; air-sound exciter 1, haptic exciter 2, and hybrid exciter 3 arranged in the seat for receiving drive electrical signals and converting the drive electrical signals into mechanical vibration and audible sound signals; and a feedback acquisition module for acquiring the actual audible sound signal received by the user, the actual mechanical vibration felt by the user, comparing the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration, and determining whether the sound and vibration are synchronized. The processing module can receive feedback information from the feedback acquisition module and optimize the parameters of the full-frequency signal.

[0088] The arrangement of the airborne sound exciter 1, the somatosensory exciter 2, and the hybrid exciter 3 within the seat satisfies the objective function relationship between the exciter position and the human body's perceived intensity. The expression for the objective function relationship between the exciter position and the human body's perceived intensity is as follows:

[0089] To maximize the human body's comprehensive perception of sound and tactile sensation, β audio (U) and β haptic (U) is the adaptive weights combined with the user feature vector U, which are 0.6 + δ u and 0.4-δ u δ u ∈[-0.1,0.1];

[0090] To minimize crosstalk between exciters, a crosstalk physical model is used. Calculate, where k is the coupling coefficient, f i For exciter-related parameters, d ij Let be the distance between exciter i and exciter j, γ be the penalty coefficient, γ∈[0.2,0.5], and d be the mechanical crosstalk hard constraint. ij ≥80+∈, ∈≥0, acoustic sensitive area constraint is Where, x i Let x be the spatial location vector of the i-th exciter. ear The location is the ear, k is the attenuation coefficient, and the tactile sensitive area is constrained to S. body,i =α·T(x i ), α·T(x i )≥T min , T(x i ) represents muscle thickness, T min Let α be the muscle thickness threshold, α be the correlation coefficient, and the neural density avoidance constraint be ||x||. i -x nerve ||≥R safe x nerve R is the location vector of the dense neural region. safe The safe distance between the exciter and the densely packed neural area;

[0091] The constraint handling rule is: if d ij If the value is less than 80, the solution is invalid. If multiple solutions satisfy the constraints, they are sorted in descending order of objective function value, and the solution with the larger objective function value is selected first.

[0092] The minimum setup distance and maximum number of exciters can be obtained from the above formulas. The exciters can then be arranged and verified according to actual needs.

[0093] The following is a table showing the specific parameters and arrangement of the airborne sound exciter 1, the somatosensory exciter 2, and the hybrid exciter 3 designed in this invention:

[0094] There are multiple hybrid exciters 3, which are arranged at 50%-60% of the height of the seat back. The distance between the hybrid exciter 3 and the auricle of the 50th percentile human body is no more than 150mm, and the distance between the hybrid exciter 3 and the scapula of the 50th percentile human body is no more than 40mm. The installation depth of the hybrid exciter 3 in the seat back is 20-30mm.

[0095]

[0096] The placement depth in the table above is the distance between the actuator and the seat surface.

[0097] For the airborne sound exciter 1: Placing the airborne sound exciter on the sides of the headrest and seat cushion eliminates the need for extensive modifications to the vehicle's interior structure, reducing adaptation difficulty and modification costs. Furthermore, its relatively easy-to-access location facilitates maintenance and component replacement, saving labor costs. In terms of performance, placement on the headrest, closer to the ears, allows for higher sound pressure levels at lower power, delivering sound more efficiently and improving clarity and sound quality. Placement on the side of the seat cushion provides sound coverage for the lower body, resulting in a more uniform sound field within the vehicle and enhancing the overall listening experience.

[0098] For the haptic exciter 2: it is placed under the backrest, on the seat cushion, on the thighs, and on the leg rest. These locations are mostly standard structural areas of the car seat itself, eliminating the need for redesigning complex fixing structures or reserving special spaces for the exciter, thus reducing design and manufacturing costs. Furthermore, these locations are relatively open, facilitating mass installation and improving installation efficiency, thereby reducing installation costs. In terms of effects, placement under the backrest and on the backrest provides low-frequency vibration feedback to the user's back, allowing them to more realistically experience low-frequency impacts in sounds such as explosions and engine roars when watching movies or playing games. Placement on the seat cushion, thighs, and leg rest enhances the user's perception of the vehicle's movement (such as bumps and acceleration) through low-frequency vibrations, improving immersion and making the experience more realistic.

[0099] For Hybrid Exciter 3: The hybrid exciter is positioned on the backrest and other locations, seamlessly integrating with the seat structure without requiring additional space, thus reducing space costs. Furthermore, since it simultaneously generates sound and vibrations, compared to installing separate airborne and haptic exciters, it reduces the number of components, lowering procurement costs and installation complexity. In terms of effect, its placement above the backrest, at a suitable distance from the ear, achieves a high sound pressure level while simultaneously stimulating the user through both auditory and tactile stimulation by emitting sound to the auricle and providing low-frequency vibrations to the shoulder blades. This significantly enhances the user's sensory experience, creating a richer and more immersive atmosphere in multimedia entertainment and virtual reality applications. Its placement at a specific angle and distance from the tragus and shoulder blades is an ergonomically optimized design, allowing for better perception of sound and vibration, improving the user experience. The placement depth of Hybrid Exciter 3 is 20mm-50mm. This depth allows for better perception of sound and vibration, enhancing the user experience without causing discomfort or fatigue due to prolonged use.

[0100] The signal input module receives multi-source signals including audio signals, video signals, and control commands. The signal input module includes an analog-to-digital converter, which is used to convert multi-source analog signals into full-frequency digital signals.

[0101] The processing module includes a frequency divider processor and an adaptive controller; the frequency divider processor is used to divide the full-frequency digital signal into frequencies, and the adaptive controller is used to match and restore the preset sound effects.

[0102] The power drive module includes an analog-to-digital converter, a digital signal processor, and a power driver; the analog-to-digital converter is used to receive the frequency-divided signal, the digital signal processor is used to convert the frequency-divided signal, and the power driver is used to amplify the converted frequency-divided signal.

[0103] Example 2

[0104] Based on Embodiment 1, a control method for an integrated excitation automotive seat system is provided, comprising the following steps:

[0105] Extract audible sound components with frequencies greater than 50Hz (achieved through acoustic filters), and extract mechanical vibration components with frequencies from 0.1Hz to 500Hz (achieved through haptic filters).

[0106] For scenarios including music, video, and control commands, multiple gain-phase curves are preset. The corresponding gain-phase curve is loaded according to the preset sound effect mode to reproduce the preset sound effect in real time. This includes gain processing and alignment processing. Gain processing: Real-time feedback from the microphone is received to process the preset gain-phase curve, suppressing structural resonance and compensating for nonlinear distortion. Alignment processing: In a multi-exciter acoustic-vibration system, the relative phase of each exciter channel is finely adjusted to bring the coupling phase difference between the acoustic signal and vibration signal in the target frequency band close to zero. This achieves the co-directional superposition of acoustic and vibration energy, improving the system's coupling efficiency through signal calibration.

[0107] The following is an example of a music scene implementation:

[0108] Objective: To appreciate pop music, rock, classical music, etc., and enhance the sense of presence and listening experience.

[0109] Frequency domain gain processing curve (20Hz–20kHz):

[0110]

[0111] Delayed phase processing curve

[0112]

[0113] After real-time restoration of preset sound effects, perform signal conversion and crossover processing:

[0114] The system receives frequency-division processed signals transmitted from an analog-to-digital converter, identifies the frequency band identifier and amplitude reference of the signal, converts the frequency-division processed signals into a standardized digital signal format recognizable by a digital signal processor, and filters out format noise. For the signal characteristics of different frequency bands, it performs parameter mapping adjustments. For acoustic frequency-division processed signals, its digital amplitude is mapped to the duty cycle parameter adapted for PWM waveform generation, generating a frequency control signal for the PWM waveform. For vibration frequency-division processed signals, its digital amplitude is mapped to the voltage amplitude parameter of a high-voltage pulse, generating a pulse width control signal.

[0115] For the overlapping frequency bands of the acoustic and vibration frequency division processed signals, a cross-correlation algorithm is used to calculate the time delay difference between the two signals. The digital sequence of the vibration frequency division processed signal is then shifted in the time domain to control the phase difference between the two signals within a set error range in the overlapping frequency band. Based on the acoustic-vibration coupling requirements, amplitude-weighted transformations are performed on the acoustic and vibration frequency division processed signals in the overlapping frequency band. The digital amplitude of the acoustic frequency division processed signal is multiplied by its coupling coefficient to obtain the contribution component of the acoustic frequency division processed signal to vibration coupling. Similarly, the digital amplitude of the vibration frequency division processed signal is multiplied by its coupling coefficient to obtain the contribution component of the vibration frequency division processed signal to acoustic coupling. The weighted acoustic and vibration frequency division processed signals are then superimposed with their respective original frequency division processed signals to generate acoustic and vibration drive digital signals. The frequency division digital signals, after format adaptation, parameter mapping, phase calibration, and weighting processing, are encoded into a drive command format recognizable by the power driver, and error check codes are added.

[0116] The acoustic drive digital signal is routed to the air acoustic exciter 1 to produce sound, the vibration drive digital signal is routed to the haptic exciter 2 to produce vibration, and the acoustic drive digital signal and the vibration drive digital signal are simultaneously routed to the hybrid exciter 3 to produce vibration and sound.

[0117] The system collects the actual audible sound signal received by the user and the actual mechanical vibration felt by the user. It then compares these two data points with the expected audible sound signal and expected mechanical vibration, respectively, and determines whether the sound and vibration are synchronized.

[0118] The system receives audible sound signals perceived by the user in real time via a microphone, converts the sound pressure signal into an analog electrical signal, filters out high-frequency noise from the analog electrical signal, amplifies the analog electrical signal to a voltage range compatible with the analog-to-digital converter, converts the analog electrical signal into a discrete digital signal, performs 512-point FFT processing on the digitized acoustic signal, converts the time-domain signal into a frequency-domain signal, extracts the amplitude values ​​of each frequency point within the set frequency band to form actual acoustic frequency response data, and marks the processing timestamp; it retrieves the preset expected audible sound frequency response curve, and calculates and outputs the difference between the actual acoustic frequency response amplitude and the expected frequency response amplitude point by point at the same frequency point.

[0119] The system uses an accelerometer to sense the mechanical vibrations actually felt by the user in real time, converts the vibration acceleration signal into an analog electrical signal, filters out low-frequency drift noise and removes high-frequency interference; after calibrating the signal amplitude to the input range of the analog-to-digital converter, it completes the digital conversion at a set sampling rate to obtain a vibration digital signal; a 512-point FFT operation is performed on the vibration digital signal to generate a vibration acceleration spectrum for a set frequency band, extracts the amplitude values ​​at each frequency point, identifies and marks the resonance peaks in the spectrum, and records relevant data and timestamps; a preset expected vibration acceleration spectrum is retrieved, and the difference between the actual vibration acceleration amplitude and the expected amplitude is calculated and output for each frequency point.

[0120] The microphone and accelerometer are synchronously triggered by the timestamp to collect actual audible sound signals and actual mechanical vibration signals respectively; 512-point FFT processing is performed on the two signals to extract the phase angle of each frequency point in the overlapping frequency band; the phase difference is calculated point by point, the preset sound and vibration synchronization phase standard is retrieved, and the time delay compensation is calculated and output.

[0121] It receives feedback information from the feedback acquisition module, optimizes parameters of the full-frequency signal, and performs three operations: gain deviation compensation for the acoustic channel, gain balance adjustment of the left and right channels of the vibration channel, and acoustic-vibration phase delay compensation for the hybrid channel.

[0122] Example 3

[0123] like Figure 4 As shown in Embodiment 2, the present invention provides an embodiment of a control system based on an integrated excitation automotive seat system:

[0124] It includes a signal input module, a processing module, a power drive module, and a feedback acquisition module.

[0125] The signal input module is used to receive multi-source analog signals and preprocess them into full-frequency digital signals.

[0126] The processing module is used to perform frequency division processing, matching, and restoration of preset sound effects on the full-frequency digital signal.

[0127] The power drive module is used to receive, convert, and amplify the frequency division processing signal and route the received, converted, and amplified frequency division processing signal to the hybrid exciter 3 and / or the air acoustic exciter 1 and / or the haptic exciter 2.

[0128] The feedback acquisition module is used to acquire the actual audible sound signal received by the user and the actual mechanical vibration felt by the user. It compares the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration, and determines whether the sound and vibration are synchronized.

[0129] The processing module can receive feedback information from the feedback acquisition module and optimize the parameters of the full-frequency signal.

[0130] The system timing follows a five-stage hard real-time pipeline with a total cycle time T ≤ 100ms and an error tolerance of ±2ms. Details of each stage are as follows:

[0131] Phase 1: Signal Preprocessing (0-5ms)

[0132] It converts multi-source analog signals such as audio, video, and control commands into a 48kHz full-frequency digital stream; it performs three-way frequency division within 5ms: acoustic channel (>50Hz), vibration channel (0.1-500Hz), and hybrid channel (full-band pass-through), while loading a preset gain-phase curve (music / movie / command mode) corresponding to the current scene.

[0133] Phase 2: Power Conversion (5-25ms)

[0134] The acoustic channel (outputs ± current PWM waveform), vibration channel (outputs ±200V high current pulse), and hybrid channel (generates composite analog power signal) all have a setup time of ≤20ms, ensuring that all signals are ready before 25ms.

[0135] Phase 3: Physical Response (25-50ms)

[0136] At the seat-human coupling point, the following are generated: acoustic excitation (sound radiation from the air on the headrest and side of the seat cushion), vibration excitation (vibration of the backrest, seat cushion, and leg support structure), and mixed excitation (sound-vibration co-coupled output on the backrest). The time required for the system to reach 90% steady-state response is ≤50ms.

[0137] Phase 4: Feedback Collection (45-90ms)

[0138] Physical response acquisition begins at 45ms: Measuring the amplitude difference in frequency between the actual and expected sound outputs, the amplitude difference in frequency between the actual and expected vibration outputs, and the phase difference between the output and input of the mixing channel to evaluate acoustic-vibration synchronization performance. Data is packaged using a 512-point FFT and delivered to the control unit 90ms prior. Frame header information (8 bytes):

[0139]

[0140] Time synchronization segment (8 bytes):

[0141]

[0142] Data block common header (4 bytes / block):

[0143]

[0144] Phase 5: Parameter Optimization (90-100ms)

[0145] The control unit calculates the gain deviation ΔG(f) and phase deviation Δφ(f) and generates a compensation command; data is collected at 100ms to complete one closed-loop cycle.

[0146] After completing phase 5, the control unit immediately sends a compensation command to the core processing unit, causing phases 1 to 5 to be executed repeatedly within a fixed 100ms cycle. The system terminates the loop when any of the following events occur: the user issues an exit command through the human-machine interface; the vehicle bus enters sleep mode; the vehicle is powered off or a reset signal is valid.

[0147] Example 4

[0148] Based on Example 3, the present invention provides a specific embodiment of system timing operation:

[0149] Phase 1: Signal Preprocessing (Time T)

[0150] The car's infotainment system sends the 48kHz / 24-bit stereo digital stream of "Seven Mile Fragrance" to the core processing unit (DSP) via the A2B audio bus. The DSP immediately loads the preset parameters for the "music scene": moderately boosting the low-frequency (60-100Hz) and high-frequency (10-16kHz) ranges, maintaining a flat mid-frequency range (1-3kHz), and fine-tuning the phase to optimize lip-sync clarity. Then, it performs three-way crossover processing.

[0151] Acoustic Channel (>50Hz): Extracts the wind chimes, crickets, vocals, mid-to-high frequency harmonics of folk guitar, and string melody from the intro;

[0152] Vibration channel (0.1-500Hz): Extracts the root tone of the bass, the impact sound of the kick drum, and the low-frequency fundamental tone of guitar chords;

[0153] Hybrid Channel (Full-Range Direct): Retains all signals, focusing on processing the complex sounds of mid-to-high frequency details and low-frequency resonance (like guitar strumming). By T+4.5ms, the three initially tuned digital signals are ready.

[0154] Phase 2: Power Conversion (T+5ms - T+24ms)

[0155] At T+5ms, the DSP distributes the three signals.

[0156] Acoustic Channel: Class-D amplifier receives signals and drives mid-high frequency speakers in the headrest and full-range units on both sides of the seat cushion, accurately reproducing the delicacy of human voices and the high-frequency details of musical instruments;

[0157] Vibration channel: The high-voltage piezoelectric actuator receives signals and drives the vibrators under the seat back and under the seat cushion to produce clean and crisp tactile vibrations that are synchronized with the bass notes and drum beats.

[0158] Hybrid Channel: The composite power amplifier receives the signal and drives the same-source transducer in the center of the backrest to perfectly reproduce the "enveloping" feel of guitar strumming. At T+24ms, the power signal enters a steady state, preparing to drive the actuator.

[0159] Phase 3: Physical Response (T+25ms - T+50ms)

[0160] After receiving the drive signal, the multi-mode exciter array generates various excitations at the seat-human coupling point:

[0161] Acoustic excitation: Users can clearly hear human voices, sibilance, and breath sounds, as well as the sound of falling leaves in the yard, with the headrest speakers creating an excellent sound field;

[0162] Vibration excitation: Whenever a bass syllable and a drumbeat sound (such as the bass syllable corresponding to each word in "overflowing like rain"), the user's waist and hips will feel a short, elastic and powerful vibration that perfectly matches the rhythm.

[0163] Hybrid excitation: At the moment of strumming the guitar, users can not only hear the sound from the backrest, but also feel the subtle, granular vibrations transmitted from the backrest, simulating the resonance of the guitar body for a highly immersive experience. At T+50ms, the speaker's sound pressure level and the exciter's acceleration both reach more than 90% of the target values.

[0164] Phase 4: Feedback Collection (T+45ms-T+88ms)

[0165] At T+45ms, the embedded sensor network initiates physical response acquisition:

[0166] The microphone captures actual human voices and high-frequency instrument sounds near the user's ear;

[0167] Accelerometers collect vibration acceleration;

[0168] Simultaneously, hybrid channel phase coherence detection is performed to evaluate the synchronization of the acoustic and vibration channel outputs. The data acquired by the sensors is rapidly analyzed using a 512-point FFT and converted into frequency domain response data. All analysis data packets are delivered to the core control unit before T+88ms.

[0169] Phase 5: Parameter Optimization (T+90ms-T+100ms)

[0170] The control unit analyzed the feedback data and found the following deviations:

[0171] The acoustic channel exhibits a gain deviation of -1.2 dB at 8 kHz, resulting in insufficient high-frequency detail.

[0172] Vibration channel left side output gain deviation δG left = -0.5dB, unbalanced left and right vibration;

[0173] The hybrid channel exhibits a slight delay at 80Hz. The acoustic vibrations are slightly out of sync.

[0174] To address these deviations, a compensation strategy was developed and implemented: digital equalization was applied to the acoustic channel at 8kHz with a gain of +1.2dB; the left output gain of the vibration channel was increased by +0.5dB; and a 0.2ms advance compensation was applied to the 80Hz signal of the vibration channel.

[0175] At T+99ms, the fine-tuned parameters are written to the registers of the power amplifier and driver chip via the SPI bus.

[0176] Continuous loop: At T+100ms, the next cycle of "Seven Mile Fragrance" audio data frame arrives, and the system starts a new round of calculation and processing.

[0177] Example 5

[0178] The present invention provides a computer program product, including a computer program, characterized in that: when the computer program is executed by a processor, it implements the steps of stages 1 to 5 as described in embodiment 3.

[0179] In summary, the specific embodiments of the invention revolve around an integrated excitation car seat system, covering multiple embodiments. Embodiment 1 provides a specific example of the integrated excitation car seat system, introducing the composition of each component, including an airborne sound exciter, a haptic exciter, a hybrid exciter, a signal input module, a processing module, a power drive module, and a feedback acquisition module. It details the objective function relationship, constraints, and installation position parameters of the hybrid exciter arrangement, while also explaining the functions of each module and the signal processing flow. Embodiment 2, based on Embodiment 1, introduces the system control method. First, audible sound and mechanical vibration components are extracted through a filter, and real-time sound effect restoration is performed according to a preset gain-phase curve for the scene, including gain processing and alignment processing. Next, the frequency-divided signal undergoes format conversion, parameter mapping, phase calibration, weighted conversion, and encoding operations, and then the processed signal is routed to the corresponding exciter. Finally, the actual sound and vibration signal is acquired and compared with the expected signal to determine synchronization and optimize parameters. Embodiment 3 provides a system timing operation embodiment, running according to a "five-stage hard real-time pipeline" with a period T≤100ms. Phase 1 performs signal preprocessing, Phase 2 performs power conversion, Phase 3 generates a physical response, Phase 4 collects feedback, and Phase 5 completes parameter optimization. Example 4 uses the audio playback of "Seven Mile Fragrance" as an example to explain in detail the specific processing procedures and effects of each phase. Examples 5 to 7 relate to computer-readable storage media and electronic devices. Examples 5 and 7 show that when a program on a computer-readable storage medium is executed by a processor, it can implement the system's operating steps; Example 6 introduces the composition of an electronic device, whose processor can implement the corresponding steps when executing the program, and various types of processors and memories are available.

[0180] The system and control method designed in this invention exhibit significant technical effects in many aspects of acoustic and vibration treatment of automobile seats:

[0181] Excellent sound reproduction and immersive experience: Through precise signal preprocessing and power conversion, the system can delicately reproduce various sound elements in music. For example, when playing "Seven Mile Fragrance", the system clearly presents vocals, wind chimes, crickets, etc., and the different channels have clear functions. The acoustic channel highlights high-frequency details, the vibration channel accurately transmits low-frequency rhythms, and the hybrid channel simulates instrument resonance, giving users an immersive listening experience and greatly enhancing the sense of immersion.

[0182] Highly precise sound-vibration coupling: Through coordinated processing at each stage, especially alignment and feedback acquisition optimization, the system achieves a near-zero sound-vibration coupling phase difference. This ensures perfect temporal synchronization of sound and vibration when playing music or other audio. For example, when bass notes and drum beats sound, the vibration precisely matches the rhythm of the sound, greatly enhancing the user's perception and experience of rhythm and improving the overall sensory effect.

[0183] High real-time performance and stability: The system operates according to a "five-stage hard real-time pipeline," with the total cycle time strictly controlled to T≤100ms and an error tolerance of only ±2ms, ensuring the timeliness and accuracy of processing at each stage. From signal input to feedback optimization, the entire process is tightly integrated, enabling real-time responses to user needs and changes in audio signals, while maintaining stability during operation. It is less prone to delays, stuttering, or inaccuracies, providing users with a continuous and smooth experience.

[0184] Powerful adaptive and optimization capabilities: The system can load corresponding preset gain-phase curves for processing according to different audio content (such as music, movies, and command modes) and scenarios. It can also detect deviations in acoustic and vibration channels through feedback acquisition and optimize parameters in a timely manner, continuously adjusting the output to adapt to different user preferences and complex and ever-changing usage environments, ensuring that high-quality sound and vibration effects are always output.

[0185] Flexible multi-channel processing: Through three-way frequency division (acoustic channel, vibration channel, and hybrid channel), it is possible to process the sound of different frequency bands in a targeted manner, give full play to the advantages of each exciter, achieve fine control of sound and vibration, and meet the diverse needs of users for sound effects and tactile vibration in different scenarios.

[0186] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this invention is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this invention are defined only by the scope of the claims. When using the terms "comprising," "having," and "including" as described in this specification, there may also be another part or other parts, and the terms used are generally singular but may also represent plural forms.

[0187] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention should be considered within the protection scope of the present invention.

Claims

1. An integrated incentive car seat system, comprising a seat, characterized in that: It also includes a signal input module for receiving multi-source analog signals and preprocessing them into full-frequency digital signals; A processing module for dividing, matching and restoring preset sound effects of full-frequency digital signals; a power drive module for receiving, converting and amplifying the divided signals and routing the received, converted and amplified divided signals to the hybrid exciter (3); and a hybrid exciter (3) arranged in the seat for receiving drive electrical signals and converting drive electrical signals into mechanical vibration and audible sound signals.

2. The integrated stimulating car seat system as described in claim 1, characterized in that: It also includes an air acoustic exciter (1) and / or a somatosensory exciter (2) disposed within the seat.

3. The integrated stimulating car seat system as described in claim 1 or 2, characterized in that: It also includes a feedback acquisition module for acquiring the actual audible sound signal received by the user, the actual mechanical vibration felt by the user, comparing the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration respectively, and determining whether the sound and vibration are synchronized. The processing module can receive the feedback information from the feedback acquisition module and optimize the parameters of the full-frequency signal.

4. The integrated stimulating car seat system as described in claim 1 or 2, characterized in that: The arrangement of the airborne sound exciter (1), the somatosensory exciter (2), and the hybrid exciter (3) within the seat satisfies a target function relationship between the exciter position and the intensity of human perception. The target function expression for the exciter position and the intensity of human perception is as follows: To maximize the human body's comprehensive perception of sound and tactile sensation, β audio (U) and β haptic (U) is the adaptive weights combined with the user feature vector U, which are 0.6 + δ u and 0.4-δ u δ u ∈[-0.1,0.1]; To minimize crosstalk between exciters, a crosstalk physical model is used. Calculate, where k is the coupling coefficient, f i For exciter-related parameters, d ij Let be the distance between exciter i and exciter j, γ be the penalty coefficient, γ∈[0.2,0.5], and d be the mechanical crosstalk hard constraint. ij ≥80+∈, ∈≥0, acoustic sensitive area constraint is Where, x i Let x be the spatial location vector of the i-th exciter. ear The location is the ear, k is the attenuation coefficient, and the tactile sensitive area is constrained to S. body,i =α·T(x i ), α·T(x i )≥T min , T(x i ) represents muscle thickness, T min Let α be the muscle thickness threshold, α be the correlation coefficient, and the neural density avoidance constraint be ||x||. i -x nerve ||≥R safe x nerve R is the location vector of the dense neural region. safe The safe distance between the exciter and the densely packed neural area; The constraint handling rule is: if d ij If the value is less than 80, the solution is invalid. If multiple solutions satisfy the constraints, they are sorted in descending order of objective function value, and the solution with the larger objective function value is selected first.

5. The integrated stimulating car seat system as described in claim 4, characterized in that: Multiple hybrid exciters (3) are arranged inside the backrest of the seat, at a position of 50%-60% of the height of the backrest of the seat.

6. The integrated energized automotive seat system as described in claim 1 or 5, characterized in that: The distance between the hybrid exciter (3) and the auricle of the 50th percentile human body is no more than 150 mm, and the distance between the hybrid exciter (3) and the scapula of the 50th percentile human body is no more than 40 mm.

7. The integrated energized automotive seat system as described in claim 1 or 5, characterized in that: The hybrid exciter (3) is installed at a depth of 20-30 mm inside the back of the seat.

8. A control system for an integrated excitation automotive seat system according to any one of claims 1-7, characterized in that: It includes a signal input module, a processing module, a power drive module, and a feedback acquisition module; The signal input module is used to receive multi-source analog signals and preprocess them into full-frequency digital signals. The processing module is used to perform frequency division processing, matching, and restoration of preset sound effects on the full-frequency digital signal; The power drive module is used to receive, convert and amplify the frequency division processing signal and route the received, converted and amplified frequency division processing signal to the hybrid exciter (3) and / or the air sound exciter (1) and / or the somatosensory exciter (2); The feedback acquisition module is used to acquire the actual audible sound signal received by the user and the actual mechanical vibration felt by the user, compare the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration respectively, and determine whether the sound and vibration are synchronized. The processing module can receive feedback information from the feedback acquisition module and optimize the parameters of the full-frequency signal.

9. The control system based on an integrated excitation automotive seat system as described in claim 8, characterized in that: The processing module includes a frequency divider processor and an adaptive controller; the frequency divider processor is used to divide the full-frequency digital signal into frequencies, and the adaptive controller is used to match and restore preset sound effects.

10. The control system based on an integrated excitation automotive seat system as described in claim 9, characterized in that: The method for frequency division processing of full-frequency digital signals includes: extracting audible sound components with frequencies greater than 50Hz through an acoustic filter, and extracting mechanical vibration components with frequencies from 0.1Hz to 500Hz through a haptic filter.

11. The control system based on an integrated excitation automotive seat system as described in claim 9, characterized in that: The method for matching and restoring preset sound effects includes: for scenarios including music, video and control commands, multiple gain-phase curves are preset, and the corresponding gain-phase curve is loaded according to the preset sound effect mode to restore the preset sound effects in real time.

12. The control system based on an integrated excitation automotive seat system as described in claim 8, characterized in that: The power drive module includes an analog-to-digital converter, a digital signal processor, and a power driver; the analog-to-digital converter is used to receive the frequency division processing signal, the digital signal processor is used to convert the frequency division processing signal, and the power driver is used to amplify the converted frequency division processing signal.

13. The control system based on an integrated excitation automotive seat system as described in claim 12, characterized in that: The method for converting the frequency-division processed signal includes: frequency-division signal format adaptation conversion, frequency band-specific parameter mapping conversion, cross-frequency band phase calibration conversion, coupling coefficient weighting conversion, and drive command encoding conversion.

14. The control system based on an integrated excitation automotive seat system as described in claim 13, characterized in that: The method for frequency division signal format adaptation and conversion includes: receiving the frequency division processing signal transmitted by the analog-to-digital converter, identifying the frequency division band identifier and amplitude reference of the signal, converting the frequency division processing signal into a standardized digital signal format recognizable by the digital signal processor, and filtering format noise.

15. The control system based on an integrated excitation automotive seat system as described in claim 13, characterized in that: The method for frequency band-specific parameter mapping and conversion includes: adjusting the parameter mapping according to the signal characteristics of different frequency bands; for acoustic frequency division processing signals, mapping their digital amplitude to the duty cycle parameter adapted to PWM waveform generation to generate a frequency control signal for PWM waveform; for vibration frequency division processing signals, mapping their digital amplitude to the voltage amplitude parameter of high voltage pulse to generate a pulse width control signal.

16. The control system based on an integrated excitation automotive seat system as described in claim 13, characterized in that: The cross-band phase calibration and conversion method includes: for the overlapping frequency band of the acoustic frequency division processing signal and the vibration frequency division processing signal, calculating the time delay difference between the two signals through a cross-correlation algorithm, and performing a time-domain translation and conversion on the digital sequence of the vibration frequency division processing signal so that the phase difference between the two signals in the overlapping frequency band is controlled within a set error range.

17. The control system based on an integrated excitation automotive seat system as described in claim 13, characterized in that: The method for weighted conversion of coupling coefficients includes: according to the acoustic-vibration coupling requirements, performing amplitude weighted conversion on the acoustic frequency division processing signal and the vibration frequency division processing signal in the overlapping frequency band; multiplying the digital amplitude of the acoustic frequency division processing signal by its coupling coefficient to obtain the contribution component of the acoustic frequency division processing signal to vibration coupling; multiplying the digital amplitude of the vibration frequency division processing signal by its coupling coefficient to obtain the contribution component of the vibration frequency division processing signal to acoustic coupling; and superimposing the weighted acoustic frequency division processing signal and the vibration frequency division processing signal with their respective original frequency division processing signals to generate an acoustic driving digital signal and a vibration driving digital signal.

18. The control system based on an integrated excitation automotive seat system as described in claim 13, characterized in that: The method for converting drive commands includes: encoding the frequency-divided digital signal, which has undergone format adaptation, parameter mapping, phase calibration, and weighting processing, into a drive command format that the power driver can recognize, and adding error check codes.

19. The control system based on an integrated excitation automotive seat system as described in claim 8, characterized in that: The method for collecting the actual audible sound signal received by the user and the actual mechanical vibration felt by the user, comparing the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration respectively, and determining whether the sound and vibration are synchronized includes: comparing the actual audible sound signal with the expected signal, comparing the actual mechanical vibration signal with the expected signal, and judging the sound and vibration synchronization performance.

20. The control system based on an integrated excitation automotive seat system as described in claim 19, characterized in that: The method for collecting actual audible sound signals and comparing them with expected signals includes: receiving the audible sound signals actually perceived by the user in real time through a microphone, converting the sound pressure signal into an analog electrical signal; filtering out high-frequency noise in the analog electrical signal, amplifying the analog electrical signal to a voltage range compatible with the analog-to-digital converter; converting the analog electrical signal into a discrete digital signal, performing 512-point FFT processing on the digitized acoustic signal, converting the time-domain signal into a frequency-domain signal, extracting the amplitude values ​​of each frequency point within the set frequency band to form actual acoustic frequency response data, and marking the processing timestamp; retrieving the preset expected audible sound frequency response curve, and calculating and outputting the difference between the actual acoustic frequency response amplitude and the expected frequency response amplitude point by point at the same frequency point.

21. The control system based on an integrated excitation automotive seat system as described in claim 19, characterized in that: The method for comparing the actual mechanical vibration signal with the expected signal includes: sensing the mechanical vibration actually felt by the user in real time through an accelerometer; converting the vibration acceleration signal into an analog electrical signal; filtering out low-frequency drift noise and removing high-frequency interference from the analog electrical signal; calibrating the signal amplitude to the input range of the analog-to-digital converter; completing the digital conversion at a sampling rate of a set frequency to obtain a vibration digital signal; performing a 512-point FFT operation on the vibration digital signal to generate a vibration acceleration spectrum of a set frequency band; extracting the amplitude values ​​at each frequency point; identifying and marking the resonance peaks in the spectrum; and recording relevant data and time stamps; retrieving the preset expected vibration acceleration spectrum; and calculating and outputting the difference between the actual vibration acceleration amplitude and the expected amplitude at each frequency point.

22. The control system based on an integrated excitation automotive seat system as described in claim 19, characterized in that: The method for judging the acoustic-vibration synchronization performance includes: synchronously triggering the microphone and accelerometer to sample by timestamp, and collecting actual audible sound signals and actual mechanical vibration signals respectively; performing 512-point FFT processing on the two signals to extract the phase angle of each frequency point in the overlapping frequency band; calculating the phase difference point by point, retrieving the preset acoustic-vibration synchronization phase standard, and calculating and outputting the time delay compensation amount.

23. The control system based on an integrated excitation automotive seat system as described in claim 8, characterized in that: The method for receiving feedback information from the feedback acquisition module and optimizing the parameters of the full-frequency signal includes: gain deviation compensation of the acoustic channel, gain balance adjustment of the left and right channels of the vibration channel, and acoustic-vibration phase delay compensation of the hybrid channel.

24. A control method for a control system based on any one of claims 8-23 of an integrated excitation automotive seat system, characterized in that: It includes the following steps: It receives multi-source analog signals and preprocesses them into full-frequency digital signals. The full-frequency digital signal is divided, matched, and restored to the preset sound effect; Receive, convert and amplify the frequency division processing signal and route the received, converted and amplified frequency division processing signal to the hybrid exciter (3) and / or the air acoustic exciter (1) and / or the haptic exciter (2); The system collects the actual audible sound signal received by the user and the actual mechanical vibration felt by the user. It then compares the actual audible sound signal received by the user and the actual mechanical vibration felt by the user with the expected audible sound signal and the expected mechanical vibration, and determines whether the sound and vibration are synchronized. The system receives feedback information from the feedback acquisition module and optimizes the parameters of the full-frequency signal.

25. A computer program product, comprising a computer program, characterized in that: When the computer program is executed by a processor, it implements the steps of the method of claim 24.

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