Method and system for transmitting and receiving low-frequency sound signal

Abstract

The invention discloses a low-frequency sound signal sending and receiving method and system, and the method comprises the steps: converting a sound signal transmitted by a to-be-detected device into a micro-vibration signal according to a preset vibration membrane; superposing a preset infrasonic wave signal into the micro-vibration signal to obtain a mixed signal; and optimizing and sending the mixed signal according to the current environment noise condition. Adjusting a signal receiving parameter according to the current environment noise condition; capturing a mixed signal in a preset detection range according to the signal receiving parameter; and restoring a sound signal sent by the to-be-detected equipment from the mixed signal. According to the application, the low-frequency sound signal emitted by the equipment is converted into the micro-vibration signal through the special vibration membrane, so that stable transmission of the low-frequency sound signal is realized.

Description

Technical Field

[0001] The present application belongs to the technical field of low-frequency sound signal transmission, and specifically relates to a method and system for sending and receiving low-frequency sound signals. Background Art

[0002] Commonly used speakers designed based on human ears generally emit harsh, high-decibel beeps to alert operators when equipment fails. However, with the current unmanned factories and unmanned production lines, especially the gradual mass production of humanoid robots, "object-object interaction" is generally the main form of unmanned environments. The high-frequency alarm sound emitted by the speaker is only useful for human ears to warn and will also cause noise pollution. Therefore, how to perform low-noise pollution detection and analysis on these devices and components is a major technical challenge.

[0003] Existing low-frequency infrasound wave technology often identifies equipment failures through the sound information emitted by the equipment. However, when the equipment is abnormal, multiple components in the equipment may make sounds at the same time, which will cause a lot of noise pollution and complicate the detection and analysis work. In addition, the low-frequency sound signal transmission process is easily disturbed by the influence of environmental changes, resulting in signal distortion and inaccurate reception. Summary of the invention

[0004] The present application proposes a method and system for sending and receiving low-frequency sound signals, which converts the low-frequency sound signals emitted by the device into micro-vibration signals through a special vibration membrane, thereby achieving stable transmission of the low-frequency sound signals.

[0005] A first aspect of the present application provides a method for sending a low-frequency sound signal, the method comprising:

[0006] According to the preset vibration membrane, the sound signal emitted by the device to be tested is converted into a micro-vibration signal;

[0007] Superimposing a preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal;

[0008] The mixed signal is optimized and sent according to the current environmental noise situation.

[0009] The above scheme uses a vibrating membrane to convert sound signals into micro-vibration signals. Since the frequency of micro-vibration signals is extremely low, they cannot be heard by human ears and will not cause noise pollution. Then, the micro-vibration signals are modulated using infrasound signals to enhance the signal's penetration and propagation distance, and improve the stability and reliability of micro-vibration signal transmission. At the same time, the mixed signal is optimized to enhance the anti-interference ability of the mixed signal during the propagation process, and overall achieve stable transmission of low-frequency sound signals.

[0010] In a possible implementation method of the first aspect, the sound signal emitted by the device to be detected is converted into a micro-vibration signal according to a preset vibration membrane, specifically:

[0011] The sound signal is converted into the mechanical vibration of the vibration membrane to obtain the micro-vibration signal; wherein, the effect of the mechanical vibration can be optimized by adjusting the geometric shape and thickness of the vibration membrane.

[0012] The above scheme converts sound signals into micro-vibration signals that are inaudible to human ears through the mechanical vibration of the vibration membrane, avoiding direct exposure of the sound to cause noise pollution. In addition, the vibration energy generated by the mechanical vibration can be more concentrated by adjusting the structure of the vibration membrane, thereby obtaining a stronger micro-vibration signal.

[0013] In a possible implementation method of the first aspect, a preset infrasound wave signal is superimposed on the micro-vibration signal to obtain a mixed signal, specifically:

[0014] According to a preset signal modulation method, the audio information corresponding to the micro-vibration signal is encoded into the infrasound wave signal to obtain a mixed signal.

[0015] The above scheme modulates the micro-vibration signal through the infrasonic signal, and uses the characteristics of the infrasonic signal to enhance the penetration and propagation distance of the micro-vibration signal, thereby ensuring that the signal can be accurately received.

[0016] In a possible implementation method of the first aspect, the mixed signal is optimized and sent according to the current environmental noise situation, specifically:

[0017] Build a signal enhancement strategy based on the current environmental noise conditions;

[0018] The infrasonic signal in the mixed signal is optimized by a signal enhancement strategy to obtain an optimized mixed signal and send it.

[0019] In the above scheme, the infrasonic signal is optimized according to environmental changes to enhance the anti-interference and anti-attenuation capabilities of the mixed signal.

[0020] A second aspect of the present invention provides a low-frequency sound signal sending device, comprising: a signal conversion module, a signal modulation module and a signal sending module;

[0021] Wherein, the signal conversion module is used to convert the sound signal emitted by the device to be detected into a micro-vibration signal according to a preset vibration membrane;

[0022] The signal modulation module is used to superimpose a preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal;

[0023] The signal sending module is used to optimize and send the mixed signal according to the current environmental noise situation.

[0024] A third aspect of the present invention provides a method for receiving a low-frequency sound signal, comprising:

[0025] Adjust signal reception parameters according to the current environmental noise conditions;

[0026] According to the signal receiving parameters, the mixed signal within the preset detection range is captured;

[0027] The sound signal emitted by the device to be detected is restored from the mixed signal, so that the component status of the device to be detected can be obtained through the sound signal.

[0028] The above scheme monitors and analyzes environmental noise and interference, and automatically adjusts signal reception parameters to optimize signal reception. Then, within the set reception range, it captures and distinguishes micro-vibration signals and infrasound signals in the environment, obtains a mixed signal containing the audio information of the device to be detected, and extracts and restores the sound signal emitted by the device to be detected from the mixed signal, obtains the corresponding audio information for accurate judgment of the fault problem of the components of the device to be detected, and realizes the covert reception and restoration of sound.

[0029] In a possible implementation method of the third aspect, the signal receiving parameters are adjusted according to the current environmental noise situation, specifically:

[0030] Collect and process environmental sound signals in real time to obtain the current environmental interference situation;

[0031] According to the environmental interference situation, the frequency band and period of signal reception are set.

[0032] In a possible implementation method of the third aspect, restoring the sound signal emitted by the device to be detected from the mixed signal is specifically:

[0033] Decoding the mixed signal to extract the sound signal emitted by the device to be detected;

[0034] De-noise and de-interference are performed on the sound signal to obtain audio information of the device to be detected.

[0035] A fourth aspect of the present invention provides a low-frequency sound signal receiving device, comprising: a parameter adjustment module, a signal capture module and a signal receiving module;

[0036] Wherein, the parameter adjustment module is used to adjust the signal receiving parameters according to the current environmental noise conditions;

[0037] The signal capture module is used to capture a mixed signal within a preset detection range according to the signal reception parameters;

[0038] The signal receiving module is used to restore the sound signal emitted by the device to be detected from the mixed signal, so as to obtain the component status of the device to be detected through the sound signal.

[0039] A fifth aspect of the present invention provides a system for sending and receiving low-frequency sound signals, comprising: a sending device and a receiving device for low-frequency sound signals;

[0040] Wherein, the sending device is used to execute a method for sending a low-frequency sound signal according to any one of the embodiments of the present invention;

[0041] The receiving device is used to execute a method for receiving a low-frequency sound signal according to any one of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 This is a specific flow chart of a method for sending a low-frequency sound signal provided in a certain embodiment of the present application;

[0044] Figure 2 It is a specific flow chart of a method for receiving a low-frequency sound signal provided in a certain embodiment of the present application;

[0045] Figure 3 A structural diagram of a low-frequency sound signal sending and receiving system provided in a certain embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] It should be understood that the step numbers used in this article are only for the convenience of description and are not intended to limit the order in which the steps are executed.

[0048] First embodiment

[0049] Existing equipment detection methods often use speakers to amplify the sound emitted by components to alert maintenance personnel that there is a problem with the components. However, these speakers are designed based on the human hearing range, and the sound emitted by the components will be converted into a harsh, high-decibel buzzing sound, causing a certain amount of noise pollution. In addition, the signal generated by these speakers has low power and a short propagation distance, and noise reduction and filtering steps are required to restore the original sound signal. Therefore, the steps are complicated, and it is easy to be disturbed by environmental changes during the transmission process, resulting in signal distortion and inaccurate reception.

[0050] like Figure 1 As shown, Figure 1 A specific flow chart of a method for sending a low-frequency sound signal is provided for a certain embodiment of the present application. The method for sending a low-frequency sound signal of this embodiment includes steps S1 to S3, which are described in detail as follows:

[0051] Step S1, converting the sound signal emitted by the device to be detected into a micro-vibration signal according to a preset vibration membrane.

[0052] In an embodiment of the present application, a low-frequency speaker with a vibrating membrane is used to convert the sound signal emitted by the device into a micro-vibration signal. Specifically, the electrical signal (i.e., sound signal) emitted by the device during operation is converted into mechanical vibration, thereby generating micro-vibration sound waves. The frequency of these micro-vibration sound waves is extremely low, far below the human hearing range, so the human ear cannot hear it directly, and no noise pollution is caused to the environment during the propagation of the micro-vibration signal. Among them, since the human ear hearing range is generally 20hz~20khz, the frequency of micro-vibration sound waves is usually below 20hz, and can be transmitted through solid and liquid media.

[0053] The vibration membrane is made of special materials, generally materials with high elasticity, low density and good vibration characteristics are selected, such as certain high molecular polymers or composite materials, which can generate efficient micro-vibration under the drive of electrical signals to obtain micro-vibration signals. In the embodiment of the present application, the design of the vibration membrane should take into account the optimization of the elasticity, density and vibration mode of the material to ensure the efficient generation and propagation of micro-vibration signals.

[0054] Optionally, the embodiment of the present application uses piezoelectric effect or electromagnetic drive to convert the sound signal into mechanical vibration of the vibration membrane. Under the piezoelectric effect, the vibration membrane will deform under the action of the electric field, thereby generating vibration; while electromagnetic drive drives the vibration membrane to vibrate by the force exerted by the current in the magnetic field.

[0055] Furthermore, if one wants to achieve better mechanical vibration effects and concentrate the vibration energy so that the micro-vibration signal can be transmitted more efficiently, the vibration mode can be optimized by designing parameters such as the geometry, thickness, and support structure of the vibration membrane.

[0056] Step S2, superimposing a preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal.

[0057] In the embodiment of the present application, based on the preset infrasound wave signal, the acquired micro-vibration signal is modulated and enhanced to achieve covert transmission of information and enhance the penetration and propagation distance of the signal.

[0058] Because the micro-vibration signal is generally lower than 20 Hz, the infrasound signal selected in the embodiment of the present application is an infrasound wave lower than 20 Hz. The infrasound signal is generated by an ultrasonic transducer or an oscillator of a specific frequency. Among them, the ultrasonic transducer generates ultrasonic waves through high-frequency vibration, and these ultrasonic waves will produce nonlinear effects when propagating in the medium, thereby generating infrasound waves.

[0059] Exemplarily, in the embodiments of the present application, frequency modulation, phase modulation or amplitude modulation is selected to encode the audio information corresponding to the micro-vibration signal into the infrasound signal to ensure that the audio information will not be destroyed or distorted during the propagation process, so as to realize the covert transmission of information.

[0060] In addition, the embodiment of the present application also superimposes an infrasound wave signal on the basis of the micro-vibration signal to enhance the signal's penetration and propagation distance.

[0061] The audio information refers to the information to be transmitted, such as "high temperature", "wear and tear" and "danger" of components, which needs to be expressed through the sound waves of the sound signal.

[0062] After signal modulation, a mixed signal will be obtained. Compared with the original micro-vibration signal, this mixed signal has better penetration and propagation distance.

[0063] Step S3: optimizing and sending the mixed signal according to the current environmental noise situation.

[0064] In the embodiments of the present application, according to the current environmental noise conditions, a reasonable sound field distribution and signal amplification circuit are designed to reduce signal attenuation and interference, enhance the strength and penetration of the infrasonic signal in the mixed signal, and improve the stability and reliability of the mixed signal.

[0065] Finally, the optimized mixed signal is sent to a receiving device for device fault detection of the device to be detected.

[0066] Implementing the embodiments of the present application has the following beneficial effects:

[0067] The embodiment of the present application converts the sound signal into a micro-vibration signal by using a vibrating membrane made of special materials. Since the frequency of the micro-vibration signal is extremely low, it cannot be heard by the human ear and will not cause noise pollution. Then, the micro-vibration signal is modulated and enhanced using an infrasound signal, and the infrasound signal and the micro-vibration signal are superimposed to enhance the signal's penetration and propagation distance, and improve the stability and reliability of the micro-vibration signal transmission. At the same time, the mixed signal is optimized to enhance the anti-interference ability of the mixed signal during the propagation process, and overall, the stable transmission of low-frequency sound signals is achieved.

[0068] Second embodiment

[0069] Furthermore, Figure 2 A specific flow chart of a method for receiving a low-frequency sound signal is provided. The method for receiving a low-frequency sound signal provided by an embodiment of the present invention includes steps S1 to S3, which are specifically as follows:

[0070] Step S1, adjusting signal receiving parameters according to the current environmental noise conditions.

[0071] In the embodiment of the present application, the environmental noise and interference are first monitored and analyzed in real time, and the signal reception parameters are automatically adjusted to optimize the signal reception effect, so as to automatically adapt to environmental changes to accurately receive signals. Among them, the frequency band and period of signal reception are set by collecting environmental sound signals and performing spectrum analysis, noise estimation and other processing, so as to provide data support for adaptive adjustment of subsequent received signals.

[0072] Furthermore, the frequency band for signal reception is generally set to a low frequency band to ensure that the medium frequency and high frequency non-micro vibration signals and infrasound signals can be automatically filtered. In addition, because the signal sending end is generally specially modulated, the sound waves emitted are relatively regular, and irregular signals will be filtered out, so a certain period can be set to ensure that the mixed signal can be received regularly.

[0073] Step S2, capturing a mixed signal within a preset detection range according to the signal receiving parameters.

[0074] In the embodiment of the present application, the micro-vibration signal and the infrasound wave signal in the environment, that is, the transmitted mixed signal, are then captured and distinguished within the set receiving range.

[0075] For example, in the embodiments of the present application, high-sensitivity microphones or vibration sensors are mainly used as receiving elements. These receiving elements have the characteristics of low noise, high dynamic range and wide frequency response, and can therefore accurately receive hidden sound signals in the environment, such as micro-vibration signals and infrasound signals.

[0076] Optionally, the receiving element can be installed on an inspection robot or a mobile detector to achieve complete detection of the equipment to be inspected and expand the range of signal reception.

[0077] Step S3, restoring the sound signal emitted by the device to be detected from the mixed signal, so as to obtain the component status of the device to be detected through the sound signal.

[0078] In an embodiment of the present application, a preset decoding algorithm is used to extract and restore the sound signal emitted by the device to be detected from the received mixed signal, and the corresponding audio information is obtained to accurately determine the fault problem of the components of the device to be detected, thereby realizing covert reception and restoration of sound.

[0079] Among them, the decoding algorithm used removes noise and interference components in the signal while extracting the sound signal, so as to restore clear audio information.

[0080] Implementing the embodiments of the present application has the following beneficial effects:

[0081] The embodiment of the present application monitors environmental noise and interference, sets signal reception parameters to achieve adaptive signal reception, and optimizes signal reception effects. In addition, a high-sensitivity receiving device is used to accurately capture low-frequency signals in the environment, obtain the emitted micro-vibration signals and infrasound signals, and restore clear audio information from the mixed signals, providing accurate data support for subsequent detection of whether equipment components have failed, and improving the stability and reliability of signal reception.

[0082] Third embodiment

[0083] Further, in order to implement the low-frequency sound signal sending and receiving system corresponding to the above method embodiment to achieve the corresponding functions and technical effects, Figure 3 A structural diagram of a low-frequency sound signal transmission and reception system is provided. For ease of description, only the parts related to this embodiment are shown. The low-frequency sound signal transmission and reception system provided by the embodiment of the present application includes:

[0084] A device for sending low-frequency sound signals, comprising:

[0085] The signal conversion module 201 is used to convert the sound signal emitted by the device to be detected into a micro-vibration signal according to a preset vibration membrane.

[0086] In an embodiment of the present application, a low-frequency speaker with a vibrating membrane is used to convert the sound signal emitted by the device into a micro-vibration signal. Specifically, the electrical signal (i.e., sound signal) emitted by the device during operation is converted into mechanical vibration, thereby generating micro-vibration sound waves. The frequency of these micro-vibration sound waves is extremely low, far below the human hearing range, so the human ear cannot hear it directly, and no noise pollution is caused to the environment during the propagation of the micro-vibration signal. Among them, since the human ear hearing range is generally 20hz~20khz, the frequency of micro-vibration sound waves is usually below 20hz, and can be transmitted through solid and liquid media.

[0087] The vibration membrane is made of special materials, generally materials with high elasticity, low density and good vibration characteristics are selected, such as certain high molecular polymers or composite materials, which can generate efficient micro-vibration under the drive of electrical signals to obtain micro-vibration signals. In the embodiment of the present application, the design of the vibration membrane should take into account the optimization of the elasticity, density and vibration mode of the material to ensure the efficient generation and propagation of micro-vibration signals.

[0088] Optionally, the embodiment of the present application uses piezoelectric effect or electromagnetic drive to convert the sound signal into mechanical vibration of the vibration membrane. Under the piezoelectric effect, the vibration membrane will deform under the action of the electric field, thereby generating vibration; while electromagnetic drive drives the vibration membrane to vibrate by the force exerted by the current in the magnetic field.

[0089] The signal modulation module 202 is used to superimpose a preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal.

[0090] In the embodiment of the present application, based on the preset infrasound signal, the acquired micro-vibration signal is modulated and enhanced, and the infrasound signal is superimposed to enhance the signal's penetration and propagation distance. After the signal modulation is completed, a mixed signal is obtained, which has better penetration and propagation distance than the original micro-vibration signal.

[0091] Because the micro-vibration signal is generally lower than 20 Hz, the infrasound signal selected in the embodiment of the present application is an infrasound wave lower than 20 Hz. The infrasound signal is generated by an ultrasonic transducer or an oscillator of a specific frequency. Among them, the ultrasonic transducer generates ultrasonic waves through high-frequency vibration, and these ultrasonic waves will produce nonlinear effects when propagating in the medium, thereby generating infrasound waves.

[0092] Exemplarily, in the embodiments of the present application, frequency modulation, phase modulation or amplitude modulation is selected to encode the audio information corresponding to the micro-vibration signal into the infrasound signal to ensure that the audio information will not be destroyed or distorted during the propagation process, so as to realize the covert transmission of information.

[0093] The signal sending module 203 is used to optimize and send the mixed signal according to the current environmental noise situation.

[0094] In the embodiment of the present application, according to the current environmental noise situation, a reasonable sound field distribution and signal amplification circuit are designed to reduce signal attenuation and interference, enhance the strength and penetration of the infrasound signal in the mixed signal, and improve the stability and reliability of the mixed signal. Finally, the optimized mixed signal is sent to the receiving device for device fault detection of the device to be detected.

[0095] The transmitting device is used to convert the electrical signal, i.e., the sound signal, emitted by the components of the equipment to be detected during operation into a low-frequency micro-vibration signal that is difficult for the human ear to detect through a vibration membrane made of special materials, so as to avoid environmental noise pollution. The micro-vibration signal is then modulated by an optimized infrasonic signal to enhance the signal's penetration and propagation distance. Finally, the infrasonic signal in the mixed signal is enhanced according to the current environmental noise situation, thereby enhancing the strength and penetration of the infrasonic signal in the mixed signal and improving the stability and reliability of the mixed signal.

[0096] A low-frequency sound signal receiving device, comprising:

[0097] The parameter adjustment module 301 is used to adjust the signal receiving parameters according to the current environmental noise situation.

[0098] In the embodiment of the present application, the receiving device is built with an environmental perception module, which can monitor and analyze environmental noise and interference in real time, automatically adjust signal reception parameters to optimize signal reception effects, and automatically adapt to environmental changes to accurately receive signals. Among them, it mainly collects environmental sound signals and performs spectrum analysis, noise estimation and other processing, sets the frequency band and period of signal reception, and provides data support for adaptive adjustment of subsequent received signals.

[0099] The signal capturing module 302 is used to capture a mixed signal within a preset detection range according to the signal receiving parameters.

[0100] In the embodiments of the present application, a highly sensitive microphone or vibration sensor is mainly used as a receiving element. These receiving elements have the characteristics of low noise, high dynamic range and wide frequency response, so they can accurately receive hidden sound signals in the environment, such as micro-vibration signals and infrasound signals. Optionally, the receiving element can be installed on a patrol robot or a mobile detector to achieve complete detection of the equipment to be detected and expand the range of signal reception.

[0101] Through a highly sensitive receiving device, the micro-vibration signals and infrasound signals in the environment, that is, the mixed signals sent, are captured and distinguished within the set receiving range.

[0102] The signal receiving module 303 is used to restore the sound signal emitted by the device to be detected from the mixed signal, so as to obtain the component status of the device to be detected through the sound signal.

[0103] In an embodiment of the present application, a preset decoding algorithm is used to extract and restore the sound signal emitted by the device to be detected from the received mixed signal, and the corresponding audio information is obtained to accurately determine the fault problem of the components of the device to be detected, thereby realizing covert reception and restoration of sound.

[0104] The receiving device is used to monitor and analyze environmental noise and interference, and automatically adjust signal receiving parameters to optimize the signal receiving effect. Then, within the set receiving range, the micro-vibration signal and infrasound signal in the environment are captured and distinguished to obtain a mixed signal containing the audio information of the device to be detected, and the sound signal emitted by the device to be detected is extracted and restored from the mixed signal to obtain the corresponding audio information for accurately judging the fault problem of the components of the device to be detected, thereby realizing the covert reception and restoration of the sound.

[0105] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for sending a low-frequency sound signal, characterized in that: include: According to the preset vibration membrane, the sound signal emitted by the device to be tested is converted into a micro-vibration signal; Superimposing a preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal; The mixed signal is optimized and sent according to the current environmental noise situation.

2. The method for sending a low-frequency sound signal according to claim 1, characterized in that: The sound signal emitted by the device to be detected is converted into a micro-vibration signal according to the preset vibration membrane, specifically: The sound signal is converted into the mechanical vibration of the vibration membrane to obtain the micro-vibration signal; wherein, the effect of the mechanical vibration can be optimized by adjusting the geometric shape and thickness of the vibration membrane.

3. The method for sending a low-frequency sound signal according to claim 1, characterized in that: The method of superimposing the preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal is specifically as follows: According to a preset signal modulation method, the audio information corresponding to the micro-vibration signal is encoded into the infrasound wave signal to obtain a mixed signal.

4. The method for transmitting a low-frequency sound signal according to claim 1, characterized in that: The step of optimizing and sending the mixed signal according to the current environmental noise situation is specifically as follows: Build a signal enhancement strategy based on the current environmental noise conditions; The infrasonic signal in the mixed signal is optimized by a signal enhancement strategy to obtain an optimized mixed signal and send it.

5. A device for sending low-frequency sound signals, characterized in that: include: Signal conversion module, signal modulation module and signal sending module; Wherein, the signal conversion module is used to convert the sound signal emitted by the device to be detected into a micro-vibration signal according to a preset vibration membrane; The signal modulation module is used to superimpose a preset infrasound wave signal onto the micro-vibration signal to obtain a mixed signal; The signal sending module is used to optimize and send the mixed signal according to the current environmental noise situation.

6. A method for receiving a low-frequency sound signal, characterized in that: include: Adjust signal reception parameters according to the current environmental noise conditions; According to the signal receiving parameters, the mixed signal within the preset detection range is captured; The sound signal emitted by the device to be detected is restored from the mixed signal, so that the component status of the device to be detected can be obtained through the sound signal.

7. The method for receiving a low-frequency sound signal according to claim 6, characterized in that: The signal receiving parameters are adjusted according to the current environmental noise conditions, specifically: Collect and process environmental sound signals in real time to obtain the current environmental interference situation; According to the environmental interference situation, the frequency band and period of signal reception are set.

8. The method for receiving a low-frequency sound signal according to claim 6, characterized in that: The step of restoring the sound signal emitted by the device to be detected from the mixed signal is specifically as follows: Decoding the mixed signal to extract the sound signal emitted by the device to be detected; De-noise and de-interference are performed on the sound signal to obtain audio information of the device to be detected.

9. A low-frequency sound signal receiving device, characterized in that: include: Parameter adjustment module, signal capture module and signal receiving module; Wherein, the parameter adjustment module is used to adjust the signal receiving parameters according to the current environmental noise conditions; The signal capture module is used to capture a mixed signal within a preset detection range according to the signal reception parameters; The signal receiving module is used to restore the sound signal emitted by the device to be detected from the mixed signal, so as to obtain the component status of the device to be detected through the sound signal.

10. A system for sending and receiving low-frequency sound signals, characterized in that: include: A sending device and a receiving device for low-frequency sound signals; Wherein, the sending device is used to execute the method for sending a low-frequency sound signal as described in any one of claims 1 to 4; The receiving device is used to execute the low-frequency sound signal receiving method described in any one of claims 6 to 8.

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