Underwater wireless optical communication method, device, equipment and storage medium

Abstract

The present application discloses an underwater wireless optical communication method, device, equipment and storage medium, which relates to the technical field of underwater environment monitoring, including: when performing underwater environment monitoring, an initial light signal is emitted into an underwater channel by the first light source, and underwater tiny particles are captured by the first light source, substrate and coating, thereby generating a scattered light signal; corresponding scattered light signals are respectively received by a plurality of the bandpass filters, and the scattered light signals are transmitted to corresponding photodetectors to obtain light intensity information under different spectra; turbidity information of the underwater channel is obtained according to the light intensity information; based on the turbidity information, an optical signal emitted by a tunable light source is adjusted to realize underwater wireless optical communication, and the optical signal emitted by the tunable light source is adaptively adjusted according to the turbidity information, so that stable optical signal transmission is achieved in turbid waters, and the best communication quality is obtained by using the most suitable communication wavelength and communication optical power.

Description

Technical Field

[0001] The present application relates to the field of underwater environment monitoring technology, and in particular to underwater wireless optical communication methods, devices, equipment and storage media. Background Art

[0002] Marine scientific research and exploration: used for real-time collection and transmission of data on marine life, geological structure, hydrology and meteorology. Researchers can obtain deep-sea data through underwater adaptive wireless communication devices for marine ecological protection, climate change research, etc. It can also be used to monitor environmental problems such as marine pollution and red tides, timely transmit monitoring data, and provide support for environmental protection and disaster warning. Provide information interaction services for underwater unmanned submersibles, submarines, etc., and support scientific research, exploration, rescue, military and other tasks. For the inspection and maintenance of submarine pipelines and optical cables, underwater wireless communication devices can provide real-time data and video transmission support. In inland water bodies such as freshwater lakes and reservoirs, underwater adaptive wireless communication devices can be used for real-time transmission of monitoring information such as water quality and water level, and provide data interaction support for water resource management. In river areas prone to floods, the deployment of underwater adaptive wireless communication devices can timely transmit data to the early warning system to reduce losses caused by flood disasters. Adaptive wireless communication devices can also be used for high-speed data return at underwater archaeological sites in real environments, such as real-time videos and photos, to facilitate remote collaboration and research by archaeological teams. In the construction of underwater tunnels, dams and other hydraulic structures, underwater adaptive wireless communication devices can provide real-time monitoring of the construction site to ensure construction safety. In accidents such as ship sinking and plane crashing into the sea, underwater adaptive wireless communication devices can assist search and rescue teams in search operations and improve rescue efficiency.

[0003] In recent years, underwater wireless optical communication technology has developed rapidly towards longer transmission distances, but it currently faces many challenges, including the impact of water turbidity on optical signals underwater, signal distortion caused by multipath propagation, and interference from the marine environment. Among them, turbidity is an important factor affecting the performance of underwater optical communications. Suspended particles in the water will scatter light waves, causing signal attenuation and distortion, limiting the transmission distance and rate of optical communications. Turbidity affects the design of underwater optical communication systems, signal modulation and demodulation, and receiving algorithms, resulting in problems such as the communication distance of underwater optical communications in turbid seawater being affected and poor stability. Summary of the invention

[0004] The main purpose of the present application is to provide an underwater wireless optical communication method, device, equipment and storage medium, aiming to solve the technical problem that the existing optical communication has poor communication effect in turbid seawater.

[0005] To achieve the above-mentioned purpose, the present application proposes an underwater wireless optical communication method, which is applied to an underwater wireless optical communication device, wherein the underwater wireless optical communication device comprises a water quality detection module and a communication transmission module, wherein the water quality detection module comprises a first light source, a substrate and a coating arranged in sequence, wherein the water quality detection module further comprises: a plurality of bandpass filters and a plurality of photodetectors, wherein the plurality of bandpass filters are arranged correspondingly to the plurality of photodetectors, wherein the spectra of each of the plurality of photodetectors are different, and wherein the communication transmission module comprises a tunable light source;

[0006] When performing underwater environment monitoring, an initial light signal is emitted into an underwater channel through the first light source to obtain a scattered light signal;

[0007] Receiving corresponding scattered light signals respectively through the plurality of bandpass filters, and transmitting the scattered light signals to corresponding photodetectors to obtain light intensity information under different spectra;

[0008] Obtaining turbidity information of the underwater channel according to the light intensity information;

[0009] The optical signal emitted by the tunable light source is adjusted based on the turbidity information to achieve underwater wireless optical communication.

[0010] In one embodiment, the step of adjusting the optical signal emitted by the tunable light source based on the turbidity information to achieve underwater wireless optical communication includes:

[0011] determining a target photodetector based on the turbidity information;

[0012] Acquire target spectrum information of the target photoelectric detector;

[0013] The optical signal emitted by the tunable light source is adjusted according to the target spectrum information to achieve underwater wireless optical communication.

[0014] In one embodiment, the adjusting the optical signal emitted by the tunable light source comprises adjusting the emission wavelength and emission power of the tunable light source;

[0015] The step of adjusting the optical signal emitted by the tunable light source according to the target spectrum information to achieve underwater wireless optical communication includes:

[0016] Obtaining a target communication wavelength and a target transmission power according to the target spectrum information;

[0017] The emission wavelength of the tunable light source is adjusted by the target communication wavelength, and the emission power of the tunable light source is adjusted by the target emission power to achieve underwater wireless optical communication.

[0018] In one embodiment, the communication transmission module further includes: an adjustment module;

[0019] The step of obtaining the target communication wavelength and the target transmission power according to the target spectrum information comprises:

[0020] receiving the target spectrum information through the adjustment module, and outputting a corresponding target voltage signal according to the target spectrum information;

[0021] The corresponding target communication wavelength and target transmission power are obtained according to the target voltage signal.

[0022] In one embodiment, the step of outputting a corresponding target voltage signal according to the target spectrum information comprises:

[0023] Obtaining target photocurrent information according to the target spectrum information;

[0024] Obtaining a saturation photocurrent and a preset photocurrent of the target photodetector;

[0025] Normalizing the photocurrent information according to the saturated photocurrent and the preset photocurrent to obtain a normalized current value;

[0026] A corresponding target voltage signal is outputted through the normalized current value.

[0027] In one embodiment, the step of determining a target photodetector based on the turbidity information comprises:

[0028] Analyzing the turbidity information to obtain light propagation loss information of different wavebands in the underwater channel;

[0029] selecting a target light propagation loss value from the light propagation loss information;

[0030] Obtaining a target wavelength band corresponding to the target light propagation loss value;

[0031] A target photoelectric detector is determined according to the target waveband.

[0032] In one embodiment, the step of determining a target photodetector based on the turbidity information comprises:

[0033] Analyzing the turbidity information to obtain light propagation loss information of different wavebands in the underwater channel;

[0034] selecting a target light propagation loss value from the light propagation loss information;

[0035] Obtaining a target wavelength band corresponding to the target light propagation loss value;

[0036] A target photoelectric detector is determined according to the target waveband.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes an underwater wireless optical communication device, the underwater wireless optical communication method is applied to the underwater wireless optical communication device, the underwater wireless optical communication device includes a water quality detection module and a communication transmission module, the water quality detection module includes a first light source, a substrate and a coating arranged in sequence, the water quality detection module also includes: a plurality of bandpass filters and a plurality of photodetectors, the plurality of bandpass filters are arranged correspondingly to the plurality of photodetectors, the spectra of each of the plurality of photodetectors are different, and the communication transmission module includes a tunable light source;

[0038] The water quality detection module is used to emit an initial light signal through the first light source and sequentially pass through the substrate and the coating to the underwater channel when performing underwater environment monitoring, and obtain a scattered light signal;

[0039] The multiple bandpass filters are used to receive the scattered light signals and transmit the scattered light signals to the corresponding photodetectors to obtain light intensity information under different spectra;

[0040] The adjustment module is used to adjust the optical signal emitted by the tunable light source in the communication transmission module according to the light intensity information to achieve underwater wireless optical communication.

[0041] In addition, to achieve the above-mentioned objectives, the present application also proposes an underwater wireless optical communication device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the underwater wireless optical communication method as described above.

[0042] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the underwater wireless optical communication method described above are implemented.

[0043] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the underwater wireless optical communication method described above.

[0044] One or more technical solutions proposed in the present application, when conducting underwater environment monitoring, an initial light signal is emitted into an underwater channel through the first light source, and underwater tiny particles are captured by the first light source, substrate and coating, thereby generating a scattered light signal; corresponding scattered light signals are respectively received by multiple bandpass filters, and the scattered light signals are transmitted to corresponding photodetectors to obtain light intensity information under different spectra; turbidity information of the underwater channel is obtained according to the light intensity information; the light signal emitted by the tunable light source is adjusted based on the turbidity information to realize underwater wireless optical communication, and the light signal emitted by the tunable light source is adaptively adjusted according to the turbidity information, so that stable light signal transmission is achieved in turbid waters, and the most suitable communication wavelength and communication optical power are used to obtain the best communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] Figure 1 A schematic diagram of a process flow provided for the first embodiment of the underwater wireless optical communication method of the present application;

[0048] Figure 2 This is a schematic diagram of the structure of an underwater wireless optical communication device according to an embodiment of the present application;

[0049] Figure 3 This is a structural schematic diagram of a water quality detection module in an embodiment of the underwater wireless optical communication method of the present application;

[0050] Figure 4 A schematic diagram of a flow chart provided for the second embodiment of the underwater wireless optical communication method of the present application;

[0051] Figure 5 Schematic diagram of the equipment structure of the hardware operating environment involved in the underwater wireless optical communication method in the embodiment of the present application.

[0052] Description of Figure Numbers:

[0053] Water quality detection module 10, first light source 101, substrate 102, coating 103, bandpass filter 104, photodetector 105;

[0054] Communication transmission module 20 , tunable light source 201 , adjustment module 202 .

[0055] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0057] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0058] The main solution of the embodiment of the present application is: when conducting underwater environment monitoring, an initial light signal is emitted into the underwater channel through the first light source, and underwater tiny particles are captured by the first light source, substrate and coating, thereby generating a scattered light signal; corresponding scattered light signals are respectively received by multiple bandpass filters, and the scattered light signals are transmitted to corresponding photodetectors to obtain light intensity information under different spectra; turbidity information of the underwater channel is obtained according to the light intensity information; the light signal emitted by the tunable light source is adjusted based on the turbidity information to realize underwater wireless optical communication, and the light signal emitted by the tunable light source is adaptively adjusted according to the turbidity information, so that stable light signal transmission is achieved in turbid waters, and the most suitable communication wavelength and communication optical power are used to obtain the best communication quality.

[0059] The solution commonly used in underwater optical communication in the prior art is that the transmitting end light source transmits signal light, which is received by the receiving end to obtain the light signal and its intensity, and then the receiving end light source transmits the light signal back to the transmitting end; by transmitting the light signal back and forth, the transmittance of the light intensity in the water is analyzed to obtain the turbidity information in the water, and the intensity and wavelength of the light source are changed to adjust to the most suitable optical communication system parameters and settings to obtain the best communication performance. However, this method relies on multiple signal feedbacks and cannot be used as the most efficient adjustment method. In addition, the turbidity in the water changes in real time, especially at a longer optical signal distance, and the parameters cannot be adjusted in time, resulting in signal loss. In addition, in underwater wireless optical communication systems, traditional light sources are mostly single-wavelength LEDs, which perform well in clear water bodies, but in dynamically changing water bodies, due to the different scattering and absorption effects of particles, the optimal communication band will change with different water quality, thereby affecting communication performance and transmission distance.

[0060] The present application provides a solution, which uses the first light source in the water quality detection module to emit a light signal to generate a scattered light signal, and determines the turbidity information of the underwater channel based on the scattered light signal, so as to adjust the light signal emitted by the tunable light source, thereby improving the system's adaptability and communication efficiency, and adaptively adjusts the light emission wavelength of the tunable light source according to the minimum loss band information fed back by the turbidity information, so as to achieve longer-distance transmission with lower emitted light power, thereby reducing the energy consumption of the communication system and improving the communication efficiency of the system.

[0061] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, an underwater wireless optical communication device, etc. The following takes an underwater wireless optical communication device as an example to illustrate this embodiment and the following embodiments.

[0062] Based on this, the embodiment of the present application provides an underwater wireless optical communication method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the underwater wireless optical communication method of the present application.

[0063] In this embodiment, if Figure 2 As shown, the underwater wireless optical communication device includes: a water quality detection module 10 and a communication transmission module 20, the water quality detection module 10 includes a first light source 101, a substrate 102 and a coating 103 arranged in sequence, the water quality detection module 10 also includes a plurality of bandpass filters 104 and a plurality of photodetectors 105, the plurality of bandpass filters 104 are arranged corresponding to the plurality of photodetectors 105, the spectra of each of the plurality of photodetectors 105 are different, and the communication transmission module 20 includes a tunable light source 201 and an adjustment module 202.

[0064] It should be noted that the first light source 101 adopts low-power white light or a wide-spectrum light source, which can cover multiple low-loss underwater transmission windows in the range of 380-760nm.

[0065] When underwater wireless communication is required, underwater environmental monitoring is performed first to determine the specific environmental conditions. Therefore, the first light source 101 can emit an initial light signal to the substrate 102 during underwater environmental monitoring, and transmit it to the coating 103 through the substrate 102, and then transmit it to the underwater channel to obtain a scattered light signal.

[0066] like Figure 3 As shown, Figure 31 is a schematic diagram of the structure of the water quality detection module 10. A low-frequency modulation signal is used to modulate white light or a wide-spectrum light source, thereby generating a light signal of a certain frequency (1kHz) and incident on a transparent substrate 102. The substrate 102 is a transparent and solid material, usually sapphire, but can also be other materials. Next, the light passes through a coating 103. The coating 103 is a semi-transparent millimeter-level coating 103 with hydrophobic properties made by spraying or spin coating. The coating 103 can usually achieve super-hydrophobic (CA>150°) performance. The surface of the coating 103 is relatively rough and has many micron-level pits, which can form an air gap with the external water environment. The gap allows more light scattered by suspended particles in the water to return to the substrate 102 and be received by the photodetector 105. The photodetector 105 can be a photodiode or other photodetectors. The suspended particles are the components of the suspension that make clear water turbid, and the particle size is usually nanometer to micron.

[0067] The multiple bandpass filters 104 are used to receive the scattered light signals and transmit the scattered light signals to the corresponding photodetectors 105 to obtain light intensity information under different spectra.

[0068] The adjustment module 202 is used to adjust the optical signal emitted by the tunable light source 201 according to the light intensity information to achieve underwater wireless optical communication.

[0069] In a specific implementation, after the first light source 101 emits an initial light signal to the substrate-coating, an air gap is formed with the external water environment, thereby generating a scattered light signal. The scattered light signal is received by a plurality of bandpass filters 104 and transmitted to the corresponding photodetector 105.

[0070] Continue as Figure 2 and Figure 3 As shown, the scattered light signal passing through the suspended particles in the water is transmitted to the corresponding photodetectors 105 (PD1, PD2, PD3...PDn) through multiple bandpass filters 104. The spectrum of each photodetector 105 is different, so the light intensity information under different spectrums can be obtained. The adjustment module 202 adjusts the optical signal of the tunable light source 201 according to the light intensity information, thereby realizing underwater wireless optical communication. The adjustment module 202 may include a power adjustment unit and a wavelength adjustment unit to adjust the power and / or wavelength of the tunable light source 201. The tunable light source 201 may be an LED, LD or other type of light-emitting device.

[0071] In this embodiment, the underwater wireless optical communication method includes steps S10 to S40:

[0072] Step S10: When performing underwater environment monitoring, an initial light signal is emitted into an underwater channel through the first light source to obtain a scattered light signal.

[0073] It should be noted that a white light / broad-spectrum LED light source is used for transmission, and the wavelength and intensity of the tunable light source of the communication transmission module are adjusted according to the real-time monitored water quality information to adapt to different water quality conditions. A low-frequency modulation signal is used to modulate the first light source to generate an initial light signal of a certain frequency (1kHz). The initial light signal passes through the substrate and coating to reach the air and then passes through the underwater channel to form a scattered light signal.

[0074] Step S20: receiving corresponding scattered light signals respectively through the plurality of bandpass filters, and transmitting the scattered light signals to corresponding photodetectors to obtain light intensity information under different spectra.

[0075] It can be understood that the scattered light signal is transmitted to photodetectors of different spectra after passing through the bandpass filter. The passband spectrum of each bandpass filter is 40nm. For example, the wavelength bandwidth of the LED light source is 360-760nm, and the photodetector spectrum is PD1: 380~420nm, PD2: 420~460nm... PD10: 740~780nm, etc. After passing through the photodetectors of different spectra, the light intensity information under different spectra is obtained. The light intensity information includes photocurrent information. The corresponding PD receives the light signal within the bandwidth and converts it into photocurrent. The light intensity information may also include other information, which is not limited in this embodiment.

[0076] Step S30: Obtaining turbidity information of the underwater channel according to the light intensity information.

[0077] In a specific implementation, the turbidity information of the underwater channel can be obtained by analyzing the light intensity information. The turbidity of the medium can be inferred from the measured light intensity and the known attenuation coefficient. The photocurrent information can also be directly obtained from the light intensity information, and the turbidity information of the underwater channel can be obtained from the photocurrent information.

[0078] In a feasible implementation, step S30 may include steps S31-S32:

[0079] Step S31: obtaining photocurrent information according to the light intensity information.

[0080] The light intensity information includes photocurrent information, which can be converted into a corresponding current signal, namely, photocurrent, by converting the light signal. The relationship between the photocurrent and the light intensity can also be established in advance. The photocurrent is proportional to the light intensity. Through the calibration process, the proportional relationship between them, namely the sensitivity coefficient, is determined, and the photocurrent is calculated based on the sensitivity coefficient and the light intensity.

[0081] Step S32: Obtaining turbidity information of the underwater channel according to the photocurrent information.

[0082] In a specific implementation, the turbidity information of the underwater channel can be obtained through the photocurrent information.

[0083] Turbidity is calculated as follows:

[0084] (Formula 1)

[0085] In the above formula 1, a is the attenuation coefficient, l is the propagation distance of light in water, I0 is the initial light intensity, I is the light intensity.

[0086] Step S40: adjusting the optical signal emitted by the tunable light source based on the turbidity information to achieve underwater wireless optical communication.

[0087] In a specific implementation, the optical signal emitted by the tunable light source can be adjusted based on the turbidity information, so that the optical signal emitted by the communication transmission module can be adaptively adjusted to ensure the transmission efficiency and distance of the signal while avoiding excessive consumption of electrical energy.

[0088] Specifically, the emitted initial optical signal may be adjusted by adjusting one or more of the emission wavelength and the emission power of the tunable light source.

[0089] The present embodiment provides an underwater wireless optical communication method. When performing underwater environmental monitoring, an initial light signal is emitted into an underwater channel through the first light source, and underwater tiny particles are captured by the first light source, substrate and coating, thereby generating a scattered light signal; corresponding scattered light signals are respectively received by a plurality of the bandpass filters, and the scattered light signals are transmitted to corresponding photodetectors to obtain light intensity information under different spectra; turbidity information of the underwater channel is obtained according to the light intensity information; based on the turbidity information, an optical signal emitted by a tunable light source is adjusted to realize underwater wireless optical communication, and the optical signal emitted by the tunable light source is adaptively adjusted according to the turbidity information, so that stable optical signal transmission is achieved in turbid waters, and the best communication quality is obtained by using the most suitable communication wavelength and communication optical power.

[0090] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 4 , step S40 includes steps S401 to S403:

[0091] Step S401: determining a target photodetector based on the turbidity information.

[0092] It should be noted that the target photodetector can be determined based on the turbidity information. For example, the photodetector corresponding to the position with the lowest turbidity is selected as the target photodetector. The light transmission loss values ​​corresponding to different photodetectors can also be determined based on the turbidity information, so that the photodetector corresponding to the target light transmission loss value is used as the target photodetector.

[0093] In a feasible implementation, step S401 may include steps A10 to A13:

[0094] Step A10: Analyze the turbidity information to obtain light propagation loss information of different bands in the underwater channel.

[0095] It should be noted that the light propagation loss in different bands can be calculated based on the turbidity information and the known attenuation coefficient, so as to obtain the light propagation loss information corresponding to different photoelectric detectors.

[0096] Step A11: Selecting a target light propagation loss value from the light propagation loss information.

[0097] In a specific implementation, all light propagation loss values ​​in the light propagation loss information may be sorted, and the light propagation loss value with the smallest light propagation loss value may be used as the target light propagation loss value.

[0098] Step A12: Obtain a target wavelength band corresponding to the target light propagation loss value.

[0099] In a specific implementation, light propagation loss data of different wavelength bands may be analyzed to find the wavelength band corresponding to the target loss value.

[0100] Step A13: Determine the target photoelectric detector according to the target band.

[0101] In a specific implementation, after a specific wavelength band is determined, a photoelectric detector matching the target wavelength band may be selected from a plurality of photoelectric detectors as a target photoelectric detector.

[0102] Step S402: Acquire target spectrum information of the target photoelectric detector.

[0103] In a specific implementation, the target spectrum information may include photocurrent information, voltage information, etc. of the target photodetector, and may also include corresponding communication wavelength and transmission power, etc., which is not limited in this embodiment.

[0104] Step S403: adjusting the optical signal emitted by the tunable light source according to the target spectrum information to achieve underwater wireless optical communication.

[0105] In a specific implementation, the optical signal emitted by the tunable light source can be adjusted by using multiple data in the target spectrum information, thereby realizing underwater wireless optical communication.

[0106] In a specific implementation, adjusting the signal emitted by the tunable light source may include adjusting the emission wavelength and emission power of the tunable light source.

[0107] In a feasible implementation, step S403 may include steps B10-B11:

[0108] Step B10: Obtaining a target communication wavelength and a target transmission power according to the target spectrum information.

[0109] It should be noted that the target spectrum information can be analyzed to determine the wavelength region with the lowest propagation loss or the most suitable for communication in the underwater channel, so as to obtain the optimal communication wavelength and the optimal transmission power. The transmission power can be calculated based on the communication distance, channel loss and required signal quality.

[0110] In a feasible implementation manner, the step of obtaining a target communication wavelength and a target transmission power according to the target spectrum information includes:

[0111] The target spectrum information is received by the adjustment module, and a corresponding target voltage signal is output according to the target spectrum information; and a corresponding target communication wavelength and target transmission power are obtained according to the target voltage signal.

[0112] It should be understood that the target spectral information can be received by the adjustment module, and the adjustment module is used to adjust the emission wavelength and emission power of the LED light source, specifically, to receive the window information m of the target photodetector, thereby outputting a target voltage signal corresponding to m, and converting the target voltage signal into a current or voltage for controlling the LED light source, thereby calculating the target communication wavelength and target emission power to adjust the emission wavelength and power.

[0113] In a feasible embodiment, the step of outputting a corresponding target voltage signal according to the target spectral information includes: obtaining target photocurrent information according to the target spectral information; obtaining the saturated photocurrent and preset photocurrent of the target photodetector; normalizing the photocurrent information according to the saturated photocurrent and the preset photocurrent to obtain a normalized current value; and outputting a corresponding target voltage signal through the normalized current value.

[0114] It should be noted that the target photocurrent information can be obtained according to the target spectrum information, so as to mNormalization is performed, and the preset photocurrent is the photocurrent value of the detection window of the target photodetector without light signal input. The photocurrent Im is normalized by the saturated photocurrent and the preset photocurrent, and the processing is as follows:

[0115] (Formula 2)

[0116] In the above formula 2, I max is the saturation photocurrent corresponding to the detection window of the target photodetector, I min is the photocurrent value of the detection window of the target photodetector when there is no light signal input, I m The target photocurrent information is outputted by normalizing the current value to the corresponding target voltage signal. According to the normalized current value, the current signal can be converted into a voltage signal using a current-voltage conversion circuit (such as a voltage follower or current-voltage converter using an op amp). For example, a conversion function or a lookup table is designed to map the normalized current value to the corresponding voltage value.

[0117] Step B11: adjusting the emission wavelength of the tunable light source by the target communication wavelength, and adjusting the emission power of the tunable light source by the target emission power, so as to realize underwater wireless optical communication.

[0118] It should be noted that the emission wavelength of the tunable light source can be adjusted according to the target communication wavelength. Specifically, the target communication wavelength is used as the optical carrier of underwater wireless communication, and the target transmission power is used as the transmission power of the tunable light source. The signal of the tunable light source is dynamically adjusted according to the loss conditions of different water bodies, thereby improving the transmission performance and transmission efficiency.

[0119] By using the light wave window of the target photodetector as the optical communication window, the electrical signal of the window has the best signal-to-noise ratio, so it is selected as the input end of the signal receiving module. Thus, turbidity detection and communication reception share one detector, which improves the integration of the communication device and reduces the cost of the device.

[0120] This embodiment determines the target photodetector based on the turbidity information; obtains the target spectrum information of the target photodetector; and adjusts the optical signal emitted by the tunable light source according to the target spectrum information to achieve underwater wireless optical communication. It can monitor the minimum loss window in real time and adaptively adjust the power of the tunable light source to ensure the transmission efficiency and distance of the signal while avoiding excessive consumption of electrical energy.

[0121] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the underwater wireless optical communication method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0122] The present application provides an underwater wireless optical communication device, the underwater wireless optical communication device comprising: a water quality detection module, a communication transmission module, the water quality detection module comprising a first light source, a substrate and a coating arranged in sequence, the water quality detection module further comprising: a plurality of bandpass filters and a plurality of photodetectors, the plurality of bandpass filters being arranged correspondingly to the plurality of photodetectors, the spectra of each of the plurality of photodetectors being different, the communication transmission module comprising a tunable light source;

[0123] The water quality detection module is used to emit an initial light signal through the first light source and sequentially pass through the substrate and the coating to the underwater channel when performing underwater environment monitoring, and obtain a scattered light signal;

[0124] The multiple bandpass filters are used to receive the scattered light signals and transmit the scattered light signals to the corresponding photodetectors to obtain light intensity information under different spectra;

[0125] The adjustment module is used to adjust the optical signal emitted by the tunable light source in the communication transmission module according to the light intensity information to achieve underwater wireless optical communication.

[0126] The underwater wireless optical communication device provided by the present application adopts the underwater wireless optical communication method in the above embodiment, which can solve the technical problem that the existing optical communication has poor communication effect in turbid seawater. Compared with the prior art, the beneficial effects of the underwater wireless optical communication device provided by the present application are the same as the beneficial effects of the underwater wireless optical communication method provided by the above embodiment, and the other technical features of the underwater wireless optical communication device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0127] The present application provides an underwater wireless optical communication device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the underwater wireless optical communication method in the above-mentioned embodiment one.

[0128] Reference below Figure 5, which shows a schematic diagram of the structure of an underwater wireless optical communication device suitable for implementing an embodiment of the present application. The underwater wireless optical communication device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The underwater wireless optical communication device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0129] like Figure 5 As shown, the underwater wireless optical communication device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the underwater wireless optical communication device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the underwater wireless optical communication device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an underwater wireless optical communication device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided instead.

[0130] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0131] The underwater wireless optical communication device provided by the present application adopts the underwater wireless optical communication method in the above embodiment, which can solve the technical problem that the existing optical communication has poor communication effect in turbid seawater. Compared with the prior art, the beneficial effects of the underwater wireless optical communication device provided by the present application are the same as the beneficial effects of the underwater wireless optical communication method provided by the above embodiment, and the other technical features of the underwater wireless optical communication device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0132] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0133] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0134] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the underwater wireless optical communication method in the above-mentioned embodiment.

[0135] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0136] The computer-readable storage medium may be included in the underwater wireless optical communication device; or may exist independently without being assembled into the underwater wireless optical communication device.

[0137] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the underwater wireless optical communication device, the underwater wireless optical communication device: when performing underwater environment monitoring, transmits an initial light signal to the underwater channel through the LED light source to obtain a scattered light signal; receives corresponding scattered light signals respectively through a plurality of bandpass filters, and transmits the scattered light signals to corresponding photodetectors to obtain light intensity information under different spectra; obtains turbidity information of the underwater channel according to the light intensity information; and adjusts the initial light signal emitted by the LED light source based on the turbidity information to achieve underwater wireless optical communication.

[0138] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0139] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0140] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0141] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned underwater wireless optical communication method, and can solve the technical problem that the existing optical communication has poor communication effect in turbid seawater. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the underwater wireless optical communication method provided in the above-mentioned embodiment, and will not be repeated here.

[0142] The present application also provides a computer program product, including a computer program, which implements the steps of the underwater wireless optical communication method as described above when executed by a processor.

[0143] The computer program product provided by the present application can solve the technical problem that the existing optical communication has poor communication effect in turbid seawater. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the underwater wireless optical communication method provided by the above embodiment, which will not be repeated here.

[0144] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An underwater wireless optical communication method, characterized in that: The underwater wireless optical communication method is applied to an underwater wireless optical communication device, wherein the underwater wireless optical communication device comprises a water quality detection module and a communication transmission module, wherein the water quality detection module comprises a first light source, a substrate and a coating arranged in sequence, wherein the water quality detection module further comprises: a plurality of band-pass filters and a plurality of photodetectors, wherein the plurality of band-pass filters are arranged correspondingly to the plurality of photodetectors, wherein the spectra of each of the plurality of photodetectors are different, and the communication transmission module comprises a tunable light source; When performing underwater environment monitoring, an initial light signal is emitted into an underwater channel through the first light source to obtain a scattered light signal; Receiving corresponding scattered light signals respectively through the plurality of bandpass filters, and transmitting the scattered light signals to corresponding photodetectors to obtain light intensity information under different spectra; Obtaining turbidity information of the underwater channel according to the light intensity information; Adjusting the optical signal emitted by the tunable light source based on the turbidity information to achieve underwater wireless optical communication; The step of adjusting the optical signal emitted by the tunable light source based on the turbidity information to achieve underwater wireless optical communication includes: Analyzing the turbidity information to obtain light propagation loss information of different wavebands in the underwater channel; selecting a target light propagation loss value from the light propagation loss information; Obtaining a target wavelength band corresponding to the target light propagation loss value; determining a target photoelectric detector according to the target band; Acquire target spectrum information of the target photoelectric detector; Adjusting the optical signal emitted by the tunable light source according to the target spectrum information to achieve underwater wireless optical communication; The adjusting of the optical signal emitted by the tunable light source comprises adjusting the emission wavelength and emission power of the tunable light source; The step of adjusting the optical signal emitted by the tunable light source according to the target spectrum information to achieve underwater wireless optical communication includes: Obtaining a target communication wavelength and a target transmission power according to the target spectrum information; Adjusting the emission wavelength of the tunable light source by the target communication wavelength, and adjusting the emission power of the tunable light source by the target emission power, so as to realize underwater wireless optical communication; The communication transmission module also includes: an adjustment module; The step of obtaining the target communication wavelength and the target transmission power according to the target spectrum information comprises: receiving the target spectrum information through the adjustment module, and outputting a corresponding target voltage signal according to the target spectrum information; The corresponding target communication wavelength and target transmission power are obtained according to the target voltage signal.

2. The method according to claim 1, characterized in that The step of outputting a corresponding target voltage signal according to the target spectrum information comprises: Obtaining target photocurrent information according to the target spectrum information; Obtaining a saturation photocurrent and a preset photocurrent of the target photodetector; Normalizing the target photocurrent information according to the saturated photocurrent and the preset photocurrent to obtain a normalized current value; A corresponding target voltage signal is outputted through the normalized current value.

3. The method according to claim 1 or 2, characterized in that The step of obtaining the turbidity information of the underwater channel according to the light intensity information comprises: Obtaining photocurrent information according to the light intensity information; The turbidity information of the underwater channel is obtained according to the photocurrent information.

4. An underwater wireless optical communication device, characterized in that: The underwater wireless optical communication method according to any one of claims 1 to 3 is applied to an underwater wireless optical communication device, wherein the underwater wireless optical communication device comprises a water quality detection module and a communication transmission module, wherein the water quality detection module comprises a first light source, a substrate and a coating arranged in sequence, wherein the water quality detection module further comprises: a plurality of bandpass filters and a plurality of photodetectors, wherein the plurality of bandpass filters are arranged correspondingly to the plurality of photodetectors, wherein the spectra of each of the plurality of photodetectors are different, and wherein the communication transmission module comprises a tunable light source and an adjustment module; The water quality detection module is used to emit an initial light signal through the first light source and sequentially pass through the substrate and the coating to the underwater channel when performing underwater environment monitoring, and obtain a scattered light signal; The multiple bandpass filters are used to receive the scattered light signals and transmit the scattered light signals to the corresponding photodetectors to obtain light intensity information under different spectra; The adjustment module is used to adjust the optical signal emitted by the tunable light source in the communication transmission module according to the light intensity information to achieve underwater wireless optical communication.

5. An underwater wireless optical communication device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the underwater wireless optical communication method according to any one of claims 1 to 3.

6. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the underwater wireless optical communication method according to any one of claims 1 to 3 are implemented.

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