CN117650852A - Water-to-air cross-medium communication device, communication method and signal processing method thereof - Google Patents

Abstract

The invention relates to a water-to-air cross-medium communication device, a communication method and a signal processing method thereof, belonging to the technical field of cross-medium communication, wherein the water-to-air cross-medium communication device comprises an acoustic transducer, a relay floating block and a laser detector; the acoustic transducer is positioned under water and is used for transmitting sound waves to the water surface to cause the vibration of the water body; the relay floating block floats on the water surface and vibrates with the water body at the same frequency under the action of the vibration of the water body; the laser detector is arranged on water and is used for emitting a first laser beam to the relay floating block and receiving a second laser beam reflected back by the relay floating block. The water-to-air cross-medium communication device utilizes the same-frequency vibration of the sound wave signals emitted by the relay floating block and the acoustic transducer to modulate the information of sound waves and laser emitted by the laser detector, thereby overcoming the influence of different transmission media on communication quality, facilitating the detection of the original sound wave signals emitted by the acoustic transducer by the laser detector and realizing stable cross-medium communication.

Description

Water-to-air cross-medium communication device, communication method and signal processing method thereof

Technical Field

The invention belongs to the technical field of cross-medium communication, and particularly relates to a water-to-air cross-medium communication device, a communication method and a signal processing method thereof.

Background

Cross-medium communication refers to a technology of communication between different physical media, and can be implemented by using different physical signals such as sound waves, laser light, electromagnetic waves and the like.

Research on communication technology between air and water has very important scientific and strategic significance, including downlink communication from air to water and uplink communication from water to air. The water-to-air cross-medium communication is an important means for accessing underwater information into commercial networks such as land, air and the like, and has important application value for the fields of ocean exploration and ocean communication.

In the prior art, chinese patent application CN111092662a discloses a cross-medium high-speed laser communication instrument, which connects a submarine with an optical fiber buoy through a light optical cable, and transmits laser to an aircraft through the optical fiber buoy to realize uplink communication from water to air. However, the light buoy needs to be connected with the submarine through a light optical cable, the light optical cable can be interfered or damaged by marine organisms or other objects to generate winding or breakage, so that a communication terminal or a fault is caused, and the diving depth of the submarine is limited by the length of the light optical cable; the uplink communication established by this patent is therefore not stable and is only suitable for use in water bodies with shallow depths and which are not susceptible to marine organisms.

Therefore, how to provide a water-to-air cross-medium communication device with stable communication is a technical problem to be solved urgently.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides a water-to-air cross-medium communication device, a communication method and a signal processing method thereof, and the common-frequency vibration of sound wave signals emitted by a relay floating block and an acoustic transducer is utilized to modulate the information of sound waves and laser emitted by a laser detector, so that the influence of different transmission media on communication quality is overcome, stable cross-medium communication is realized, and the problem of unstable transmission links of the current water-to-air cross-medium communication is solved.

The present invention provides a water-to-air cross-media communication device comprising:

an acoustic transducer positioned under water for emitting sound waves to the water surface to cause the water body to vibrate;

the relay floating block floats on the water surface and vibrates with the water body at the same frequency under the action of the vibration of the water body;

the laser detector is arranged on water and is used for emitting a first laser beam to the relay floating block and receiving a second laser beam reflected by the relay floating block.

The technical scheme can overcome the influence of different transmission media on communication quality and realize stable cross-medium communication.

In some of these embodiments, the laser detector receives the second laser beam and processes the second laser beam to obtain a communication signal; the water-to-air cross-medium communication device further comprises a signal collector, wherein the signal collector is in communication connection with the laser detector and is used for collecting and transmitting communication signals. According to the technical scheme, the communication signals are acquired through the signal acquisition device and are converted into digital signals to be transmitted, so that the communication precision and reliability are improved.

In some embodiments, the water-to-air cross-medium communication device further comprises a host computer, wherein the host computer is in communication connection with the signal collector and is used for controlling the signal collector and receiving, storing and displaying communication signals. According to the technical scheme, the upper computer receives the acquired communication signals and stores and displays the communication signals, so that a user can conveniently check communication data, analyze communication results and the like.

In some of these embodiments, the water-to-air cross-media communication device further comprises a remote control communicatively coupled to the acoustic transducer for controlling the acoustic transducer. According to the technical scheme, the remote controller is used for controlling the starting and ending of the sound wave emitted by the acoustic transducer, and controlling and adjusting parameters of sound wave signals.

In some embodiments, a laser reflection film is attached to the surface of the relay floating block, and the laser reflection film is used for improving the intensity of the second laser beam. According to the technical scheme, the intensity of the second laser beam is improved through the laser reflection film, so that the optical signal received by the laser detector is enhanced, correspondingly, the voltage signal output by the laser detector is enhanced, and the communication signal is more reliable.

Besides, the invention also provides a water-to-air cross-medium communication method which is applied to the water-to-air cross-medium communication device and comprises the following steps:

s1, an acoustic transducer emits sound waves to the water surface, and the sound waves cause the water body to vibrate;

s2, the relay floating block vibrates with the same frequency of the water under the action of the water vibration;

s3, the laser detector emits a first laser beam to the relay floating block, the first laser beam and the vibration frequency of the water body are modulated to obtain a second laser beam, and the relay floating block reflects the second laser beam; the laser detector receives the second laser beam.

In some of these embodiments, the water-to-air cross-medium communication method further comprises: s4, the laser detector processes the second laser beam to obtain a communication signal, and the signal collector collects and transmits the communication signal.

In some embodiments, the step S4 further comprises the step of receiving, storing and displaying the communication signals by the upper computer.

In some of these embodiments, in step S1, the remote control controls the acoustic transducer to emit sound waves.

Besides, the invention also provides a water-to-air cross-medium communication signal processing method which is applied to the water-to-air cross-medium communication device and comprises the steps of processing information to be transmitted by an acoustic transducer and processing a second laser beam by a laser detector; wherein,

the processing step of the acoustic transducer to the information to be transmitted comprises the following steps: the acoustic transducer carries out analog-to-digital conversion on the information to be transmitted, and then sequentially carries out M-sequence scrambling and channel coding to obtain the information to be modulated; FSK modulation is carried out on information to be modulated under specific fundamental frequency, and modulated information is obtained; adding a synchronous head signal to the modulated information to obtain a transmitting sound wave;

the processing step of the laser detector for the second laser beam comprises the following steps: the laser detector synchronously processes the information of the second laser beam to obtain information to be demodulated; FSK demodulation is carried out on the information to be demodulated, and demodulated information is obtained; and sequentially performing channel decoding and M-sequence descrambling on the demodulated information to obtain receiving information.

According to the technical scheme, the reliability and the accuracy of the signals can be improved through the modulation of the information to be transmitted and the demodulation of the second laser beam.

Based on the scheme, the water-to-air cross-medium communication device and the communication method can utilize the same-frequency vibration of the sound wave signals emitted by the relay floating block and the acoustic transducer to modulate the information of the sound wave and the laser emitted by the laser detector, so that the influence of different transmission media on communication quality is overcome, the laser detector is convenient to detect the original sound wave signals emitted by the acoustic transducer, and stable cross-medium communication is realized; according to the water-to-air cross-medium communication signal processing method, the reliability and the accuracy of signals can be improved through modulation of information to be transmitted and demodulation of the second laser beam.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic diagram of a water-to-air cross-medium communication device in accordance with an embodiment of the present invention;

FIG. 2 is a flow chart of a method of water-to-air cross-medium communication in an embodiment of the invention;

FIG. 3 is a flowchart of the steps for processing information to be transmitted by an acoustic transducer in a water-to-air cross-medium communication signal processing method according to an embodiment of the present invention;

FIG. 4 is a flowchart showing the steps of processing a second laser beam by the laser detector according to the method for processing a water-to-air cross-medium communication signal in the embodiment of the present invention;

fig. 5 is a time-frequency diagram of a synchronization header signal in a method for processing a water-to-air cross-medium communication signal according to an embodiment of the present invention.

In the figure:

1. an acoustic transducer; 2. a remote controller; 3. a relay floating block; 4. a laser detector; 5. a signal collector; 6. an upper computer;

101. a watertight connecting line; 102. a power supply; 103. a pressure barrel;

301. a laser reflection film;

401. a tripod; 402. and a cushion pad.

Detailed Description

The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center," "lateral," "longitudinal," "upper," "lower," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, in one embodiment of the water-to-air cross-medium communication device, the communication method, and the signal processing method thereof of the present invention, the water-to-air cross-medium communication device includes an acoustic transducer 1, a relay slider 3, and a laser detector 4; the acoustic transducer 1 is positioned under water and is used for emitting sound waves to the water surface to cause the vibration of the water body; the relay floating block 3 floats on the water surface and vibrates with the same frequency as the water body under the action of the vibration of the water body; the laser detector 4 is disposed on the water, and is configured to emit a first laser beam toward the relay float 3 and receive a second laser beam reflected back from the relay float 3.

In the above-described exemplary embodiment, it should be noted that the acoustic transducer 1 emits an acoustic wave signal, the water body vibrates due to the low-frequency vibration of the acoustic wave signal, and the relay float 3 is affected by the vibration of the water body, and also generates the low-frequency vibration; the laser detector 4 can emit high-frequency laser, when the laser detector 4 emits the first laser beam to the surface of the relay floating block 3, the low-frequency vibration of the relay floating block 3 can be modulated into the first laser beam, and the second laser beam is reflected back to the laser detector 4 through the relay floating block 3, and the second laser beam can reflect the frequency information of the low-frequency sound wave signal emitted by the acoustic transducer 1, so that communication is realized. According to the embodiment, the acoustic transducer 1 emits acoustic waves, the relay floating block 3 and the same-frequency vibration of acoustic wave signals emitted by the acoustic transducer 1 are utilized to modulate the information of the acoustic waves and laser emitted by the laser detector 4, so that the influence of different transmission media on communication quality is overcome, the laser detector 4 is convenient to detect the original acoustic wave signals emitted by the acoustic transducer 1, and stable cross-medium communication is realized; meanwhile, the low attenuation and the wide frequency band of the sound wave can expand the communication range and quality, and the high speed and the low delay of the laser can improve the communication efficiency and capacity; therefore, the water-to-air cross-medium communication device provided by the embodiment has very high communication reliability and has important application value in the fields of underwater acoustic communication, ocean exploration, marine biology and the like.

In some embodiments, as shown in fig. 1, the laser detector 4 receives the second laser beam and processes the second laser beam to obtain a communication signal; the water-to-air cross-medium communication device further comprises a signal collector 5, wherein the signal collector 5 is in communication connection with the laser detector 4 and is used for collecting and transmitting communication signals. The communication signal obtained by the laser detector 4 is a voltage signal, and the communication signal is collected by the signal collector 5 and converted into a digital signal for transmission, so that the accuracy and reliability of communication are improved.

Further, as shown in fig. 1, the water-to-air cross-medium communication device further includes an upper computer 6, where the upper computer 6 is communicatively connected to the signal collector 5, and is used for controlling the signal collector 5, and receiving, storing and displaying the communication signal. The upper computer 6 is connected with the signal collector 5 through a communication interface and a cable, can send a control command to the signal collector 5, receives a communication signal (digital signal) acquired by the signal collector 5, and stores and displays the communication signal; for example, the upper computer 6 is internally provided with software capable of receiving and processing communication signals, and can store the communication signals as files or draw the communication signals as waveform diagrams and the like, so that a friendly operation interface is provided for a user, and the user can conveniently check communication data, analyze communication results and the like.

In some embodiments, as shown in fig. 1, the water-to-air cross-medium communication device further comprises a remote control 2, the remote control 2 being communicatively connected to the acoustic transducer 1 for controlling the acoustic transducer 1. The starting and ending of the sound wave emitted by the acoustic transducer 1 are controlled by the remote controller 2, and parameters of the sound wave signals are controlled and adjusted.

In some embodiments, as shown in fig. 1, the surface of the relay floating block 3 is attached with a laser reflection film 301, and the laser reflection film 301 is used to increase the intensity of the second laser beam. The laser reflection film 301 can improve the reflection intensity of the laser in the emission band of the laser detector 4, and strengthen the optical signal, in this embodiment, the laser reflection film 301 improves the intensity of the second laser beam, so that the optical signal received by the laser detector 4 is enhanced, correspondingly, the voltage signal output by the laser detector 4 is enhanced, and the communication signal is more reliable.

In some embodiments, as shown in fig. 1, the acoustic transducer 1 is connected to a power supply 102 through a watertight connection 101, and a stable power supply is provided for the acoustic transducer 1 through the power supply 102, so that a communication duration is prolonged within a certain range.

In some embodiments, as shown in fig. 1, the acoustic transducer 1 is placed in a pressure tank 103; by the arrangement of the pressure barrel 103, the acoustic transducer 1 is protected from the water pressure; the material, structure and size of the pressure barrel 103 can be reasonably designed according to the underwater working environment and the performance of the acoustic transducer 1, and the material, structure and size of the pressure barrel 103 are not limited in this embodiment.

Further, a fixing bracket for fixing the acoustic transducer 1 is provided in the pressure barrel 103; the installation of the acoustic transducer 1 is made more convenient and stable by the fixing bracket.

In some embodiments, as shown in fig. 1, the laser detector 4 is mounted on a tripod 401; the stability of the laser detector 4 is improved by the tripod 401. In order to facilitate adjusting the angle of the laser detector 4, a knob for adjusting the angle is provided at the connection between the tripod 401 and the laser detector 4.

Further, as shown in fig. 1, the tripod 401 is provided with a buffer pad 402 at the bottom; by providing the cushion 402, external disturbances such as noise and impact can be buffered, and the influence of the external disturbances on communication can be reduced.

Based on the above water-to-air cross-medium communication device, the present invention further provides a water-to-air cross-medium communication method, as shown in fig. 2, which is applied to the above water-to-air cross-medium communication device, and includes the following steps:

s1, an acoustic transducer 1 emits sound waves to the water surface, and the sound waves cause the water body to vibrate;

s2, the relay floating block 3 vibrates with the same frequency of the water under the action of the water vibration;

s3, the laser detector 4 emits a first laser beam to the relay floating block 3, the first laser beam and the vibration frequency of the water body are modulated to obtain a second laser beam, and the relay floating block 3 reflects the second laser beam; the laser detector 4 receives the second laser beam;

in the above-described exemplary embodiment, the relay floating block 3 generates vibration of the same frequency as the acoustic wave signal, the laser detector 4 detects and emits the first laser beam to the relay floating block 3, the first laser beam modulates the vibration of the relay floating block 3 to generate the second laser beam, and the relay floating block 3 reflects the second laser beam back to the laser detector 4, so that the laser detector 4 can detect the vibration rate information of the relay floating block 3, and cross-medium communication from underwater to air is realized.

In some embodiments, as shown in fig. 2, the water-to-air cross-medium communication method further comprises: s4, the laser detector 4 processes the second laser beam to obtain a communication signal, and the signal collector 5 collects and transmits the communication signal. In this step, the signal collector 5 collects the communication signal and converts it into a digital signal for transmission, thereby improving the accuracy and reliability of communication.

In some embodiments, as shown in FIG. 2, step S4 further comprises the host computer 6 receiving, storing and displaying the communication signals. In this step, the communication signals are stored and displayed by the upper computer 6, so that a friendly operation interface is provided for the user, and the user can conveniently check the communication data, analyze the communication result and the like.

In some embodiments, as shown in fig. 1, in step S1, the remote controller 2 controls the acoustic transducer 1 to emit sound waves. In this step, the remote controller 2 controls the acoustic transducer 1 to emit sound waves to start and end, and controls and adjusts parameters of sound wave signals.

In addition, as shown in fig. 3-4, the invention also provides a water-to-air cross-medium communication signal processing method, which is applied to the water-to-air cross-medium communication device and comprises a processing step of the acoustic transducer 1 for information to be transmitted and a processing step of the laser detector 4 for a second laser beam; wherein,

as shown in fig. 3, the processing steps of the acoustic transducer 1 to be transmitted information include: the acoustic transducer 1 carries out analog-to-digital conversion on information to be transmitted, and then sequentially carries out m-sequence scrambling and channel coding to obtain information to be modulated; FSK modulation is carried out on information to be modulated under specific fundamental frequency, and modulated information is obtained; adding a synchronous head signal to the modulated information to obtain a transmitting sound wave;

as shown in fig. 4, the processing step of the second laser beam by the laser detector 4 includes: the laser detector 4 carries out synchronous processing on the information of the second laser beam to obtain information to be demodulated; FSK demodulation is carried out on the information to be demodulated, and demodulated information is obtained; and sequentially performing channel decoding and m-sequence descrambling on the demodulated information to obtain receiving information.

In the above-described exemplary embodiment, the acoustic transducer 1 processes and modulates the information to be transmitted, and the laser detector 4 processes and demodulates the second laser beam, and outputs the received information for subsequent analysis of error statistics and the like. In the processing step of the information to be transmitted, the acoustic transducer 1 can acquire data which is distributed equally with noise after m-sequence scrambling is carried out on the information to be transmitted, so that the concealment and safety of the information to be transmitted are improved, and the confidentiality and anti-interference capability of communication are improved; the channel coding can add some redundant information into the information to be transmitted, so that when the acoustic signal is received, the receiving end can detect and correct errors generated in the transmission process, and the reliability and quality of the signal are improved; the information to be transmitted generates different fading characteristics on specific frequencies through FSK modulation, so that the influence of a channel is reduced, and the anti-interference capability of communication is improved; by adding the synchronous head signal, the acoustic transducer 1 and the laser detector 4 are helped to realize synchronization, and the integrity and accuracy of the signals are ensured. In the processing step of the second laser beam by the laser detector 4, the synchronization and demodulation process corresponds to the modulation and addition of the synchronization head signal of the acoustic transducer 1, and the technical effects thereof are not repeated. In summary, in this embodiment, by modulating the information to be transmitted and demodulating the second laser beam, the reliability and accuracy of the signal can be improved.

In some embodiments, the channel coding is a convolutional code coding.

The specific construction and operation of one embodiment of the water-to-air cross-medium communication device, communication method, and signal processing method of the present invention are described below with reference to fig. 1-5:

(1) The acoustic transducer 1 emits acoustic wave signals

As shown in fig. 1, parameters of information to be transmitted, such as wavelength, frequency, etc., are set through a remote controller 2, an acoustic transducer 1 is placed in a pressure barrel 103, and is fixed through a fixed bracket, so that the direction with the strongest directivity of the acoustic transducer 1 is directed to the water surface; the acoustic transducer 1 used in this embodiment has an optimum transmitting frequency of 11.5kHz, a 3dB bandwidth of 3kHz, and a maximum transmitting sound source level of 195dB as the open angle of the acoustic transducer 1 is 30 °. The acoustic transducer 1 generates bit information by analog-to-digital conversion, the bit information is subjected to scrambling in m sequence and convolutional code encoding, FSK modulation is carried out, 4FSK is selected in the embodiment, and 10kHz, 10.75kHz, 11.5kHz and 12.25kHz are selected as fundamental frequencies of FSK modulation according to the characteristics of the acoustic transducer 1; after modulation is completed, adding a synchronous head signal, as shown in fig. 5, in this embodiment, a spike-shaped signal, in which a sweep frequency signal on 10kHz-13kHz and a sweep frequency signal under 13kHz-10kHz alternately appear, is selected as the synchronous head signal, and in order to improve the accuracy of synchronization, the synchronous head is repeatedly added for 3 times to generate an acoustic wave signal; the acoustic transducer 1 emits an acoustic signal causing the body of water to vibrate.

(2) The relay floating block 3 vibrates at the same frequency

As shown in fig. 1, the relay floating block 3 vibrates with the same frequency as the water under the action of the water vibration; in the embodiment, the relay floating block 3 adopts a rigid foam block with the length of about 80cm, the width of about 50cm and the thickness of about 10 cm; a 380ns laser reflection film 301 is stuck on the surface of the relay floating block 3 far away from the water surface, and the thickness of the laser reflection film 301 is about 2mm; the relay float 3 floats freely on the water surface, with its position within the open angle range of the acoustic transducer 1.

(3) The laser detector 4 emits and recovers a laser signal

As shown in fig. 1, the lens direction of the laser detector 4 faces the relay floating block 3, and the laser emitted by the laser detector 4 is focused on the laser reflection film 301 on the surface of the relay floating block 3 through the focusing function, so that the laser focusing point is kept within the range of the laser reflection film 301 in the communication process; the laser detector 4 emits a first laser beam to the relay floating block 3, the first laser beam and the vibration of the relay floating block 3 are modulated to generate a second laser beam, the relay floating block 3 reflects the second laser beam, and the laser detector 4 firstly carries out synchronous processing after receiving the second laser beam to obtain information to be demodulated; finding a starting range of FSK modulation for demodulation to obtain demodulated information; the demodulated information is decoded by a convolution code and descrambled by m sequences to obtain receiving information; the laser detector 4 outputs a communication signal based on the received information, and performs subsequent analysis such as error statistics.

By way of illustration of various embodiments of the water-to-air cross-medium communication device, communication method, and signal processing method of the present invention, it can be seen that the water-to-air cross-medium communication device, communication method, and signal processing method embodiments of the present invention have at least one or more of the following advantages:

1. according to the water-to-air cross-medium communication device and the communication method, the same-frequency vibration of the sound wave signals emitted by the relay floating blocks and the acoustic transducer is utilized to modulate the information of the sound waves and the laser emitted by the laser detector, so that the influence of different transmission media on the communication quality is overcome, and the stability of cross-medium communication is improved;

2. according to the water-to-air cross-medium communication signal processing method, the reliability and the accuracy of signals can be improved through the modulation of the information to be transmitted and the demodulation of the second laser beam.

Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.

Claims (10)

1. A water-to-air cross-media communication device, comprising:

an acoustic transducer positioned under water for emitting sound waves to the water surface to cause the water body to vibrate;

the relay floating block floats on the water surface and vibrates with the water body at the same frequency under the action of the water body vibration;

the laser detector is arranged on water and is used for emitting a first laser beam to the relay floating block and receiving a second laser beam reflected back by the relay floating block.

2. The water-to-air cross-media communication device of claim 1, wherein the laser detector receives the second laser beam and processes the second laser beam to obtain a communication signal; the water-to-air cross-medium communication device further comprises a signal collector, wherein the signal collector is in communication connection with the laser detector and is used for collecting and transmitting the communication signals.

3. The water-to-air cross-media communication device of claim 2, further comprising a host computer communicatively coupled to the signal collector for controlling the signal collector and receiving, storing and displaying the communication signal.

4. A water-to-air cross-media communication device as claimed in claim 1 or 3, further comprising a remote control communicatively connected to the acoustic transducer for controlling the acoustic transducer.

5. The water-to-air cross-media communication device of claim 1, wherein the relay float has a laser reflective film affixed to a surface thereof for increasing an intensity of the second laser beam.

6. A water-to-air cross-medium communication method, applied to the water-to-air cross-medium communication device of any one of claims 1-5, comprising the steps of:

s1, the acoustic transducer emits sound waves to the water surface, and the sound waves cause the water body to vibrate;

s2, the relay floating block vibrates with the same frequency as the water under the action of the water vibration;

s3, the laser detector emits a first laser beam to the relay floating block, the first laser beam and the vibration frequency of the water body are modulated to obtain a second laser beam, and the relay floating block reflects the second laser beam; the laser detector receives the second laser beam.

7. The water-to-air cross-media communication method of claim 6, wherein the water-to-air cross-media communication method further comprises:

s4, the laser detector processes the second laser beam to obtain a communication signal, and the signal collector collects and transmits the communication signal.

8. The method of water-to-air cross-medium communication of claim 7, wherein step S4 further comprises the host computer receiving, storing and displaying the communication signal.

9. The water-to-air cross-media communication method of claim 6 wherein in step S1, a remote control controls the acoustic transducer to emit sound waves.

10. A method for processing a water-to-air cross-medium communication signal, which is characterized by being applied to the water-to-air cross-medium communication device according to any one of claims 1-5 and comprising the steps of processing information to be transmitted by an acoustic transducer and processing a second laser beam by a laser detector; wherein,

the processing step of the acoustic transducer to the information to be transmitted comprises the following steps: the acoustic transducer performs analog-to-digital conversion on the information to be transmitted, and then sequentially performs M-sequence scrambling and channel coding to obtain the information to be modulated; FSK modulation is carried out on the information to be modulated under a specific fundamental frequency, and modulated information is obtained; adding a synchronous head signal to the modulated information to obtain a transmitting sound wave;

the processing step of the laser detector on the second laser beam comprises the following steps: the laser detector synchronously processes the information of the second laser beam to obtain information to be demodulated; FSK demodulation is carried out on the information to be demodulated, and demodulated information is obtained; and sequentially performing channel decoding and M-sequence descrambling on the demodulated information to obtain receiving information.