Wireless somatosensory vibration system for home theater

Abstract

The utility model relates to the technical field of seat driving, and discloses a wireless somatosensory vibration system for a home theater, which comprises an audio signal processing end and a vibration driving end arranged in each seat of the home theater. The audio signal processing end comprises an audio signal processing module and a first Bluetooth module and is used for acquiring an audio signal output by a home theater sound system, quantizing the amplitude and frequency of the audio signal and then sending the audio signal; and the vibration driving end comprises a second Bluetooth module, a vibration signal processing module and a somatosensory vibrator, and is used for receiving the frequency and amplitude of the audio signal and generating a sine wave current signal to drive the somatosensory vibrator to vibrate. According to the utility model, the audio signal is analyzed to obtain the corresponding digital signal, so that the anti-interference performance of the signal is improved, and the signal is not easily interfered by the environment; and the Bluetooth module is used for broadcast transmission, so that the trouble of wiring is avoided, the cost is reduced, the quality and reliability of signal transmission are improved, and the film watching experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat drive, especially a wireless somatosensory vibration system for home theater. BACKGROUND

[0002] With the continuous upgrading of home entertainment demand, the popularity of home theater in modern families is increasing. Consumers' requirements for the viewing experience of home theater are no longer limited to high-definition picture quality and surround sound effect, but pursue more immersive and all-round sensory experience. Among them, the somatosensory vibration through the seat and other equipment to enhance the perception of film plot has become an important development direction to improve the immersion of home theater.

[0003] The traditional somatosensory vibration system of home theater mostly adopts wired connection mode. This mode needs to lay a large number of cables between each seat of the theater and the signal source, which not only increases the complexity and cost of wiring at the initial stage of theater decoration, but also may affect the home beauty in the later use process. In addition, the existence of cable may also lead to signal transmission failure due to cable aging, wear and tear or pulling, and it is extremely inconvenient to maintain and replace. In addition, the traditional scheme directly transmits audio signals to the vibration device. Since the frequency range of audio signals is wide and the signals are complex, they are easily affected by environmental electromagnetic interference and other factors during transmission, resulting in unstable vibration effect and reduced matching degree with film plot, which seriously affects the viewing experience of users. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems of complex wiring, high cost in the prior art, and direct transmission of audio signals which is easily affected by environmental interference, leading to unstable driving of somatosensory vibrator.

[0005] To solve the above technical problems, the utility model provides a wireless somatosensory vibration system for home theater, comprising:

[0006] An audio signal processing end comprises:

[0007] An audio signal processing module is electrically connected with the home theater sound system, acquires the audio signal output by the home theater sound system, and quantitatively acquires the amplitude and frequency of the audio signal;

[0008] A first Bluetooth module is electrically connected with the audio signal processing module and is used for sending the frequency and amplitude of the audio signal;

[0009] A vibration driving end is arranged in each seat of the home theater and comprises:

[0010] A second Bluetooth module is in communication connection with the first Bluetooth module and is used for receiving the frequency and amplitude of the audio signal;

[0011] The vibration signal processing module is electrically connected with the second Bluetooth module, and generates a sinusoidal wave current signal based on the frequency and amplitude of the audio signal;

[0012] The somatosensory vibrator is electrically connected with the vibration signal processing unit and vibrates based on the driving of the sinusoidal wave current signal.

[0013] In an embodiment of the present application, the audio signal processing module comprises:

[0014] The signal acquisition subunit is connected with the home theater audio system at the input end, acquires the audio signal, filters, and outputs a comprehensive filtered signal;

[0015] The single-chip microcomputer comprises:

[0016] The ADC sampler is connected with the output end of the signal acquisition subunit at the input end, converts the filtered signal into a digital signal, and outputs the digital signal;

[0017] The digital low-pass filter is connected with the output end of the ADC sampler at the input end, filters out high-frequency signals in the digital signal, and outputs a low-frequency digital signal;

[0018] The counter is connected with the output end of the digital low-pass filter at the input end, and acquires the frequency of the low-frequency digital signal;

[0019] The signal processor is connected with the output end of the digital low-pass filter at the input end, and acquires the amplitude of the low-frequency digital signal.

[0020] In an embodiment of the present application, the signal acquisition subunit comprises:

[0021] The first RC filter is connected with the left channel of the home theater audio system at the input end, filters the left channel audio signal, and outputs a left filtered signal;

[0022] The second RC filter is connected with the right channel of the home theater audio system at the input end, filters the right channel audio signal, and outputs a right filtered signal;

[0023] The audio processor is connected with the output ends of the first RC filter and the second RC filter at the input end, combines the left filtered signal and the right filtered signal into a comprehensive signal, and outputs the comprehensive signal.

[0024] In an embodiment of the present application, the audio processor comprises NE5532 or LM324.

[0025] In an embodiment of the utility model, the single-chip microcomputer includes STM32F103, STM32F407, CH32V303, CH32V305, CH32F303 or CH32F305.

[0026] In an embodiment of the utility model, the first Bluetooth module and the second Bluetooth module include Bluetooth 5.2 or a Bluetooth version higher than 5.2.

[0027] In an embodiment of the utility model, the vibration signal processing module includes a direct digital frequency synthesizer or a waveform generator.

[0028] In an embodiment of the utility model, the vibration driving end further includes:

[0029] The power amplification circuit has an input end connected to the vibration signal processing module and an output end connected to the somatosensory vibrator, and is used for amplifying the sinusoidal current signal and inputting the amplified signal to the somatosensory vibrator.

[0030] In an embodiment of the utility model, the power amplification circuit is an H-bridge driving circuit.

[0031] In an embodiment of the utility model, the somatosensory vibrator includes a piezoelectric somatosensory vibrator or an electromagnetic somatosensory vibrator.

[0032] The above technical solution of the utility model has the following advantages compared with the prior art:

[0033] The wireless somatosensory vibration system for home theater acquires the amplitude and frequency of the audio signal output by the home theater sound system at the audio signal processing end, and transmits the audio signal to the vibration driving end in each seat of the home theater by using the Bluetooth module, so as to drive the somatosensory vibrator to vibrate correspondingly. The utility model analyzes the audio signal at the audio signal processing end to acquire the corresponding digital signal, improves the anti-interference performance of the signal, and is not easily affected by environmental interference. The Bluetooth module is used for broadcasting transmission, which can not only avoid the trouble of wiring and reduce the cost, but also improve the quality and reliability of signal transmission, and bring users a more convenient, efficient and immersive home theater viewing experience. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to make the content of the utility model more easily understood, the utility model will be further described in detail below according to the specific embodiments of the utility model and in combination with the drawings, in which:

[0035] Figure 1 is a structure diagram of the wireless somatosensory vibration system for home theater provided by the utility model;

[0036] Figure 2It is a structure diagram of the audio signal processing module. DETAILED DESCRIPTION

[0037] The utility model makes further explanation in combination with the drawings and specific embodiment, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0038] Referring to Figure 1 The utility model provides a structure diagram of wireless somatosensory vibration system for home theater, and the specific structure includes:

[0039] The audio signal processing end includes:

[0040] The audio signal processing module is electrically connected with the home theater sound system, obtains the audio signal output by the home theater sound system, and quantizes the amplitude and frequency of the audio signal;

[0041] The first Bluetooth module is electrically connected with the audio signal processing module and is used for sending the frequency and amplitude of the audio signal;

[0042] The vibration driving end arranged in each seat of the home theater includes:

[0043] The second Bluetooth module is in communication connection with the first Bluetooth module and is used for receiving the frequency and amplitude of the audio signal;

[0044] The vibration signal processing module is electrically connected with the second Bluetooth unit, generates a sinusoidal current signal based on the frequency and amplitude of the audio signal;

[0045] The somatosensory vibrator is electrically connected with the vibration signal processing unit and vibrates based on the driving of the sinusoidal current signal.

[0046] Referring to Figure 2 It is a structure diagram of the audio signal processing module, and specifically includes:

[0047] The signal acquisition subunit is connected with the home theater sound system at the input end, obtains the audio signal, filters, and outputs the comprehensive filter signal;

[0048] The single-chip microcomputer includes:

[0049] The input end of the ADC sampler is connected with the output end of the signal acquisition subunit, converts the filter signal into a digital signal output;

[0050] The input end of the digital low-pass filter is connected with the output end of the ADC sampler, filters out the high-frequency signal in the digital signal, and outputs a low-frequency digital signal;

[0051] A counter, an input end of which is connected to an output end of the digital low-pass filter, acquires the frequency of the low-frequency digital signal.

[0052] A signal processor, an input end of which is connected to an output end of the digital low-pass filter, acquires the amplitude of the low-frequency digital signal.

[0053] Wherein, the counter calculates the period of the low-frequency digital signal by measuring the time interval between two adjacent rising edges or falling edges, and combining the clock frequency of the counter, and then obtains the frequency of the low-frequency digital signal. The signal processor converts the signal from the time domain to the frequency domain, the size of the peak in the frequency domain is related to the amplitude of the signal, and through the analysis and processing of the spectrum data, the signal amplitude can be accurately acquired.

[0054] Wherein, the signal acquisition subunit comprises:

[0055] A first RC filter, an input end of which is connected to the left channel of the home theater audio system, filters the left channel audio signal, and outputs a left filter signal;

[0056] A second RC filter, an input end of which is connected to the right channel of the home theater audio system, filters the right channel audio signal, and outputs a right filter signal;

[0057] An audio processor, an input end of which is connected to the output ends of the first RC filter and the second RC filter, combines the left filter signal and the right filter signal into a comprehensive signal output.

[0058] Specifically, the audio signal processing module of the embodiment filters out noise signals through left and right channel RC filter circuits, and combines them into a single channel; the audio data sampling frequency of the left and right channels is 48kHz through the single-chip microcomputer ADC sampling; high-frequency signals are filtered out through the high-order digital low-pass filter (49 order), and only low-frequency signals below 150Hz are left; the frequency data is calculated through the counter, the amplitude information is calculated through the window maximum value and the minimum value, and the frequency amplitude data sequence is packaged into a data packet output.

[0059] Specifically, the single-chip microcomputer includes an STM32F103, an STM32F407, a CH32V303, a CH32V305, a CH32F303, or a CH32F305. The STM32F103 series is built-in with a 12-bit ADC sampler, has multiple channels, and can meet various analog signal acquisition requirements; a digital low-pass filter can effectively filter out high-frequency noise and improve signal quality; the counter resource and window comparison function are provided to facilitate signal comparison and judgment. The CH32V303 and CH32V305 are RISC-V kernel chips, and the CH32F303 and CH32F305 are Cortex-M3 kernel-based chips; all of the four chips are built-in with high-precision ADCs, can realize a digital low-pass filter at the software level, and have rich counter resources, so that the window comparison function can be realized by combining the ADC and comparison instructions through software.

[0060] Specifically, the audio processor includes an NE5532 or an LM324. The NE5532 is a dual operational amplifier, which is used to amplify two audio signals respectively, and then add the amplified signals through a resistance network to realize the mixing function. The NE5532 has the characteristics of low noise, low distortion, and wide bandwidth, which can ensure the high-quality mixing of audio signals and reduce signal distortion. The LM324 is a four operational amplifier, and two operational amplifiers can be selected to amplify two audio signals respectively, and then the two amplified audio signals are mixed into one through an addition circuit. The LM324 has a wide power supply voltage range, which can adapt to various power supply conditions and has good versatility in different application scenarios.

[0061] Specifically, the audio signal processing end of the embodiment collects the audio signal output by the home theater sound system, filters the audio signal, extracts the amplitude and frequency information of the low-frequency component in the audio signal, and generates vibration information data. Usually, 100 frequency-amplitude data sequences per second are generated as vibration information data. Then, the vibration information data is broadcasted to the Bluetooth 5.2 module in each sofa in the home theater through the Bluetooth 5.2 LEA protocol. The Bluetooth module in the sofa receives the vibration information data through broadcasting and parses the vibration information into frequency-amplitude sequence data. Based on the frequency-amplitude sequence data, sinusoidal signals are sequentially generated to drive the haptic vibrator to vibrate following the sinusoidal signals, thereby generating vibration effects synchronized with the audio.

[0062] The embodiment analyzes the audio signal at the audio signal processing end and generates vibration information data. The generated digital signal has stronger anti-interference performance, and the vibration information data is transmitted through a wireless mode, which eliminates the trouble of wiring installation in wired transmission.

[0063] Since the embodiment needs to broadcast the frequency and amplitude of the audio signal, Bluetooth 5.2 LEA protocol and higher versions need to be selected to realize the unified driving of multiple seats by using the broadcast mode of the audio signal; specifically, the first Bluetooth module and the second Bluetooth module include Bluetooth 5.2 or Bluetooth versions higher than 5.2.

[0064] In the embodiment, the vibration signal processing module includes a direct digital frequency synthesizer or a waveform generator. The direct digital frequency synthesizer (DDS) mainly consists of a phase accumulator, a sine lookup table, a digital-to-analog converter and the like; the phase accumulator continuously accumulates the phase value with the frequency control word as the step under the driving of the clock signal, and the output thereof serves as the address of the sine lookup table, the sine lookup table stores the sine wave amplitude values corresponding to the phase, and the digital amplitude values are converted into analog sine wave signals through the DAC. Common models include AD9954 and AD9914; AD9954 can generate a frequency agile analog output sine wave with a maximum frequency of 160MHz, has precise frequency tuning and phase tuning functions; AD9914 can generate a frequency agile analog output sine wave with a maximum frequency of 1.4GHz, has fast frequency hopping and precise tuning resolution, and supports multiple operating modes. The waveform generator usually uses direct digital synthesis technology or microprocessor-based digital signal processing technology to generate various waveforms; it internally stores the digitized data of different waveforms, and generates corresponding analog waveform signals by controlling the output rate and amplitude of the data and the like after DAC conversion.

[0065] In the embodiment, the vibration driving end further includes a power amplification circuit, an input end of which is connected to the vibration signal processing module, and an output end of which is connected to the haptic vibrator, for amplifying the sine wave current signal and inputting it to the haptic vibrator. The power of the sine wave current signal received from the vibration signal processing module is amplified to drive the haptic vibrator to generate vibration with sufficient intensity.

[0066] The power amplification circuit is an H-bridge driving circuit, which realizes power amplification by controlling the conduction and cutoff time of the power switching devices in the H-bridge.

[0067] Specifically, the haptic vibrator includes a piezoelectric haptic vibrator or an electromagnetic haptic vibrator.

[0068] The piezoelectric haptic vibrator is based on the piezoelectric effect. When an electric field is applied to both ends of the piezoelectric material, the material will deform. Conversely, when the material is deformed by an external force, an electric charge will be generated at both ends of the material. When a sinusoidal current signal is applied to the piezoelectric haptic vibrator, the electric field generated by the current signal causes the piezoelectric material to deform, and this deformation generates mechanical vibration, so that the user can feel the vibration. The deformation response of the piezoelectric material in the piezoelectric haptic vibrator is almost instantaneous, and can quickly follow the change of the electric signal to generate vibration, so that timely and high-frequency vibration can be realized. Moreover, the piezoelectric haptic vibrator has small size and simple structure, and is easy to integrate.

[0069] The electromagnetic haptic vibrator mainly comprises a coil, a permanent magnet and an elastic element. When current passes through the coil, a magnetic field is generated. The magnetic field interacts with the magnetic field of the permanent magnet to generate electromagnetic force. The electromagnetic force makes the vibrator vibrate, and the elastic element provides restoring force to enable the vibrator to continue to vibrate when the current changes, so that the user can feel the vibration. The electromagnetic haptic vibrator can generate relatively large vibration force, and has wide adjustment range of vibration frequency and amplitude, relatively simple structure and high reliability.

[0070] The wireless haptic vibration system for the home theater acquires the amplitude and frequency of the audio signal output by the home theater sound system at the audio signal processing end, and transmits the audio signal to the vibration driving end in each seat of the home theater by using the Bluetooth module, so as to drive the haptic vibrator to vibrate correspondingly. The audio signal is analyzed at the audio signal processing end, and the corresponding digital signal is acquired, so that the anti-interference performance of the signal is improved, and the signal is not easily disturbed by the environment. The Bluetooth module is used for broadcasting and sending, so that the wiring is avoided, the cost is reduced, the quality and reliability of signal transmission are improved, and the user can have more convenient, efficient and immersive home theater viewing experience.

[0071] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A wireless body-shaking vibration system for home theater, characterized by, The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device.

2. The wireless haptic vibration system for home theater of claim 1, wherein, The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device.

3. The wireless haptic vibration system for home theater of claim 2, wherein, The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device.

4. The wireless haptic vibration system for home theater of claim 3, wherein, The application relates to an audio signal processing method and device.

5. The wireless haptic vibration system for home theater of claim 2, wherein, The application relates to an audio signal processing method and device.

6. The wireless haptic vibration system for home theater of claim 1, wherein, The application relates to an audio signal processing method and device.

7. The wireless haptic vibration system for home theater of claim 1, wherein, The application relates to an audio signal processing method and device.

8. The wireless haptic vibration system for home theater of claim 1, wherein, The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device.

9. The wireless haptic vibration system for home theater of claim 8, wherein, The application relates to an audio signal processing method and device.

10. The wireless haptic vibration system for home theater of claim 1, wherein, The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. The application relates to an audio signal processing method and device. 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