CN116170031A - Portable wearable underwater wireless optical communication device and method - Google Patents
Portable wearable underwater wireless optical communication device and method Download PDFInfo
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- CN116170031A CN116170031A CN202310428749.5A CN202310428749A CN116170031A CN 116170031 A CN116170031 A CN 116170031A CN 202310428749 A CN202310428749 A CN 202310428749A CN 116170031 A CN116170031 A CN 116170031A
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- H—ELECTRICITY
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- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/385—Transceivers carried on the body, e.g. in helmets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a portable wearable underwater wireless optical communication device and a method, wherein the portable wearable underwater wireless optical communication device comprises: the sealing structure is a transparent acrylic barrel-shaped structure; a front-end structure for transmitting optical signals and receiving optical signals; a back-end structure for communication between the optical communication device and other underwater equipment, or connection between the optical communication device and a diver; the metal sealing ring is used for realizing watertight packaging of the optical communication device in a manner of extruding the rubber ring; the circuit structure is used for communication signal modulation, signal processing, signal decoding and demodulation, signal recovery, signal display and power supply of the whole device of the optical communication device; the front end structure, the rear end structure, the metal sealing ring and the circuit structure are respectively arranged in the sealing structure and are respectively fixedly connected with the sealing structure. The invention provides a miniaturized portable underwater wireless optical communication device, which has the characteristic of high communication efficiency.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a portable wearable underwater wireless optical communication device and a portable wearable underwater wireless optical communication method.
Background
With the gradual development and utilization of ocean resources by the country, underwater operations are becoming more and more. In an underwater complex operation environment, due to the defects of large volume, high cost, high operation difficulty and the like of underwater equipment, a large number of divers are still required to work in the complex underwater operation. However, divers face a series of difficulties in underwater operation, such as the fact that the underwater working environment and the operation condition cannot be communicated with land commanders and other divers in real time, the underwater visible distance is limited, the underwater working environment cannot be mastered in time, and the personal safety of the divers cannot be guaranteed under the condition of lack of information communication.
The existing communication modes of the underwater equipment are divided into two types of wired communication and wireless communication, wherein the underwater wired communication establishes a communication loop between a diver and a land worker by using a communication cable to complete the communication between the underwater diver and the land worker. When a plurality of divers or underwater equipment are required to cooperatively work for some underwater operation tasks, a plurality of underwater communication cables are required to be built, so that the operation cost is greatly increased, and meanwhile, due to the special underwater operation environment and the irregular movement of the divers under water, the use of the communication cables is easy to cause cable winding and knotting, so that the flexibility of the divers is greatly limited. With the improvement of wireless communication technology, wireless communication is becoming the mainstream of underwater communication.
Electromagnetic wave technology is the most widely used wireless communication technology, but the electromagnetic wave is very serious in propagation attenuation in water, so that the electromagnetic wave can not be applied under water. Acoustic communication is also the primary means of communication in current underwater communication technologies, with much less attenuation of acoustic waves propagating in water than electromagnetic waves. However, the underwater acoustic equipment has relatively large volume and high power consumption, and a diver cannot be equipped with large-size underwater acoustic equipment when working under the underwater complex environment; in addition, the underwater acoustic equipment uses acoustic wave propagation, so that the transmission bandwidth is low, the communication speed is low, and the real-time performance of communication cannot be ensured. The underwater wireless optical communication technology (UWOC) is a novel underwater high-speed wireless real-time communication technology, a high-performance Light Emitting Diode (LED) is used for sending out high-speed scintillation signals to transmit communication information, a high-sensitivity photoelectric detector is used for capturing and detecting, a high-speed AD sampling circuit is used for sampling, and an analog-digital conversion circuit is used for decoding and demodulating signals to finish underwater real-time data transmission. In addition, the integration level of the optical communication equipment is very high, the power consumption is small, the equipment cost is low, and the like. The underwater wireless communication device manufactured by the underwater wireless optical communication technology has small volume, can be assembled on miniaturized underwater working equipment, can be worn on a diver, and simultaneously uses optical signals as signal carriers, and provides an active illumination function when the underwater high-speed communication is completed, so that the underwater visible distance of the diver or other underwater equipment is greatly increased, and the operation safety of the diver is ensured.
At present, underwater wireless communication is mainly underwater acoustic communication, but underwater acoustic equipment is large in size and high in power consumption, and cannot be assembled on miniaturized underwater equipment or divers. Meanwhile, due to the low transmission bandwidth and slow transmission rate of underwater acoustic communication, the underwater acoustic communication system is generally hundreds of Kbps, and cannot meet the requirements of underwater real-time communication.
Accordingly, there is a need in the art for improvement.
Disclosure of Invention
The invention aims to solve the technical problems of inconvenience and low communication efficiency of the existing underwater wireless communication device by providing the portable wearable underwater wireless optical communication device and the portable wearable underwater wireless optical communication method aiming at the defects of the prior art.
The technical scheme adopted for solving the technical problems is as follows:
in a first aspect, the present invention provides a portable wearable underwater wireless optical communication device comprising:
the sealing structure is a transparent acrylic barrel-shaped structure;
a front-end structure for transmitting optical signals and receiving optical signals;
a back end structure for communication between the optical communication device and other underwater equipment, or connection between the optical communication device and a diver;
The metal sealing ring is used for realizing watertight packaging on the optical communication device in a manner of extruding the rubber ring;
the circuit structure is used for communication signal modulation, signal processing, signal decoding and demodulation, signal recovery, signal display and power supply of the whole device of the optical communication device;
the front end structure, the rear end structure, the metal sealing ring and the circuit structure are respectively arranged in the sealing structure and are respectively and fixedly connected with the sealing structure.
In one implementation, the front end architecture includes:
the device comprises a light emitting diode, a photoelectric detector, a temperature sensor, a transmitting and receiving circuit and an optical darkroom;
the transmitting and receiving circuit is arranged at the top of the sealing structure and is fixedly connected with the sealing structure;
the light emitting diode, the photoelectric detector, the temperature sensor and the optical darkroom are respectively arranged on the transmitting and receiving circuit and are respectively fixedly connected with the transmitting and receiving circuit; the photodetector is disposed within the optical dark chamber.
In one implementation, the photodetector is located at a center of the transmitting-receiving circuit, and the light emitting diodes are distributed in a circumferential array around the photodetector.
In one implementation, the light emitting diode is a TO5.6mm model packaged diode.
In one implementation, the photodetector is a TO-model packaged detector;
the photosensitive surface of the photoelectric detector is 10mm 2 The spectrum range is 400 nm-700 nm of visible light.
In one implementation, the back-end structure includes:
communication interface, vent valve, device switch, and voice interface;
the communication interface is used for being connected to other underwater equipment to realize mutual communication among underwater settings; the ventilation valve is used for enabling the air pressure in the device to be lower than the air pressure outside the device in an air extraction mode, so that the tightness of the device is detected; the device switch is used for switching on or off the whole device; the voice interface is connected to a voice device worn on the diver;
the communication interface, the ventilation valve, the device switch and the voice interface are respectively arranged at the bottom of the sealing structure and are respectively and fixedly connected with the sealing structure.
In one implementation, the metal seal ring includes:
the device comprises a ring body, a first rubber sealing ring and a second rubber sealing ring;
the first rubber sealing ring is arranged on the top surface of the ring body and is embedded in a groove on the top surface of the ring body;
The second rubber sealing ring is arranged on the side surface of the bottom of the ring body and is embedded in the groove on the side surface of the bottom of the ring body.
In one implementation, the circuit structure includes:
the device comprises a supporting structure, a voice processing module, a communication interface module, a lithium battery, a power supply voltage stabilizing module, a signal processing circuit, a signal display circuit and a liquid crystal display screen;
the support structure is fixedly connected with the ring body of the metal sealing ring; the voice processing module, the communication interface module, the lithium battery, the power supply voltage stabilizing module, the signal processing circuit, the signal display circuit and the liquid crystal display screen are respectively and fixedly connected with the supporting structure.
In one implementation, the method further comprises:
the handheld handle is arranged on the side face of the sealing structure and is fixedly connected with the sealing structure.
In a second aspect, the present invention also provides a portable wearable underwater wireless optical communication method, including:
the method comprises the steps that a sending end obtains a voice signal of a diver or a communication signal of underwater equipment, initializes and modulates the voice signal or the communication signal, and sends the processed optical signal to a receiving end;
And receiving the optical signal sent by the sending end through the receiving end, performing signal conversion, signal amplification and signal demodulation processing on the optical signal, and outputting a voice signal or transmitting the voice signal.
In one implementation manner, the method for obtaining, by a transmitting end, a voice signal of a diver or a communication signal of an underwater device, initializing and modulating the voice signal or the communication signal, and transmitting the processed optical signal to a receiving end includes:
acquiring a voice signal input by a diver or a communication signal of a communication interface;
the voice signal is converted into an initial signal through a voice processing module, or the communication signal is converted into the initial signal through a communication interface module;
modulating and encoding the initial signal through a signal processing circuit to obtain a modulated signal;
the transmitting and receiving circuit controls the on-off state of the light emitting diode, and the communication content is loaded on the light beam to form an optical signal;
and sending the processed optical signal to a receiving end.
In one implementation manner, the receiving, by a receiving end, the optical signal sent by the sending end, performing signal conversion, signal amplification and signal demodulation on the optical signal, and outputting a voice signal or transmitting the voice signal, and includes:
Collecting the received optical signals through a photoelectric detector and converting the optical signals into electric signals;
amplifying and filtering the received electric signals through a transmitting and receiving circuit;
the received electric signals are decoded, demodulated and subjected to signal recovery processing by a signal processing circuit, and the signals are divided into graphic signals, voice signals and communication signals;
processing the graphic signal through a signal display circuit and displaying the graphic signal in a display screen;
and processing the voice signal through a voice processing module to obtain voice content.
In one implementation, the signal processing circuit performs decoding demodulation and signal recovery processing on the received electric signal to divide the signal into a graphics signal, a voice signal and a communication signal, and then further includes:
and processing the communication signals through the communication interface module, and transmitting the processed communication signals to other underwater equipment to perform mutual communication among the underwater equipment.
The technical scheme adopted by the invention has the following effects:
the invention provides a miniaturized portable underwater wireless optical communication device which is only provided with a water cup, can be conveniently held by a diver or worn on the body to carry out underwater operation, has high optical communication transmission bandwidth, and can achieve Gbps in a transmission rate block, so that the diver can complete high-speed real-time communication between the diver and the diver or between the diver and a land staff.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a portable wearable underwater wireless optical communication device in one implementation of the present invention.
FIG. 2 is a cross-sectional view of FIG. 1 in one implementation of the invention.
Fig. 3 is a schematic diagram of a front end architecture in one implementation of the invention.
FIG. 4 is a schematic diagram of a back-end architecture in one implementation of the invention.
FIG. 5 is a schematic view (first view) of a metal seal ring in one implementation of the invention.
FIG. 6 is a schematic view (second view) of a metal seal ring in one implementation of the invention.
Fig. 7 is a block diagram of circuitry of a portable wearable underwater wireless optical communication device in one implementation of the present invention.
Fig. 8 is a schematic diagram (first view) of a circuit structure in one implementation of the present invention.
Fig. 9 is a schematic diagram (second view) of a circuit structure in one implementation of the present invention.
FIG. 10 is a block diagram of a power supply system in one implementation of the invention.
FIG. 11 is a flow chart of a portable wearable underwater wireless optical communication method in one implementation of the invention.
Fig. 12 is a flow chart of portable wearable underwater wireless optical communication in one implementation of the invention.
Fig. 13 is a schematic diagram of received optical power at different optical transmission distances in an implementation of the present invention.
Fig. 14 is a schematic diagram of a signal processing system amplifier circuit in one implementation of the invention.
Figure 15 is a schematic diagram of a signal processing system D/a converter circuit in one implementation of the invention.
FIG. 16 is a schematic diagram of a signal processing system A/D converter circuit in one implementation of the invention.
Fig. 17 is a schematic diagram of signal modulation in one implementation of the invention.
In the figure: 1. a front end structure; 2. a rear end structure; 3. a metal seal ring; 4. a circuit structure; 5. a hand grip; 11. a transmitting-receiving circuit; 12. a first light emitting diode; 13. a second light emitting diode; 14. a third light emitting diode; 15. a temperature sensor; 16. a photodetector; 17. an optical darkroom; 21. a communication interface; 22. a vent valve; 23. a device switch; 24. a voice interface; 31. the first screw hole site; 32. a first rubber seal ring; 33. a second rubber seal ring; 34. the second screw hole site; 41. a support structure; 42. a lithium battery; 43. a communication interface module; 44. a voice processing module; 45. a power supply voltage stabilizing module; 46. a third screw hole site; 47. a signal processing circuit; 48. a signal display circuit; 49. a liquid crystal display.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Exemplary apparatus
At present, underwater wireless communication is mainly underwater acoustic communication, but underwater acoustic equipment is large in size and high in power consumption, and cannot be assembled on miniaturized underwater equipment or divers. Meanwhile, due to the low transmission bandwidth and slow transmission rate of underwater acoustic communication, the underwater acoustic communication system is generally hundreds of Kbps, and cannot meet the requirements of underwater real-time communication.
Aiming at the technical problems, the embodiment of the invention provides a portable wearable underwater wireless optical communication device which is a miniaturized portable underwater wireless optical communication device, the device is only provided with a water cup, a diver can conveniently hold or wear the device on the body to carry out underwater operation, meanwhile, the optical communication transmission bandwidth is high, the transmission rate block can reach Gbps, and thus, the diver can complete high-speed real-time communication between the diver and the diver or between the diver and land staff.
The embodiment provides a portable wearable underwater wireless optical communication device.
As shown in fig. 1 to 2, in one implementation manner of this embodiment, the portable wearable underwater wireless optical communication device includes: a sealing structure (not labeled), a front end structure 1, a rear end structure 2, a metal sealing ring 3, a circuit structure 4 and a hand-held handle 5; the front end structure 1, the rear end structure 2, the metal sealing ring 3 and the circuit structure 4 are respectively arranged in the sealing structure and are respectively fixedly connected with the sealing structure.
In this embodiment, the sealing structure is an acryl transparent barrel-shaped structure; the front-end structure 1 is used for transmitting optical signals and receiving optical signals; the back-end structure 2 is used for communication between the optical communication device and other underwater equipment, or for connection between the optical communication device and a diver; the metal sealing ring 3 is used for realizing watertight packaging on the optical communication device in a manner of extruding a rubber ring; the circuit structure 4 is used for communication signal modulation, signal processing, signal decoding and demodulation, signal recovery, signal display and power supply of the whole device of the optical communication device.
Specifically, as shown in fig. 1-2, the whole device is sealed in an acrylic transparent drum in a water-tight manner, in order to realize the portable wearable function of underwater communication, the diameter of the device is smaller than 50mm, the length is smaller than 130mm, and suspended materials or weight materials are added into the internal space of the device to enable the whole device to be in a zero-buoyancy suspended state, so that the device is more suitable for complex underwater operation environments, and short-range bidirectional communication between underwater designs or between divers can be realized; the device consists of 6 parts: a sealing structure, a front end structure 1, a rear end structure 2, a metal sealing ring 3, a circuit structure 4 and a hand-held handle 5.
For complex underwater operation environments (such as application scenes of underwater search and rescue, underwater overhaul, underwater investigation and the like), a plurality of underwater devices or a plurality of divers are required to cooperate with each other, the divers and the divers are required to communicate with each other in real time, and land staff are required to master the underwater operation environments in real time. The use of underwater wired communication is costly and affects divers' underwater operations resulting in inconvenient actions; the portable wearable underwater wireless optical communication device provided by the invention can meet the application requirements.
Further, as shown in fig. 3, the front end structure includes: light emitting diodes (including the first light emitting diode 12, the second light emitting diode 13, and the third light emitting diode 14 in fig. 3), a photodetector 16, a temperature sensor 15, a transmitting-receiving circuit 11, and an optical darkroom 17; the front-end structure 1 is mainly responsible for the light emission and light signal receiving of the light source of the underwater optical communication device.
Specifically, the transmitting and receiving circuit 11 is disposed at the top of the sealing structure and is fixedly connected with the sealing structure; the light emitting diode, the photodetector 16, the temperature sensor 15 and the optical darkroom 17 are respectively arranged on the transmitting and receiving circuit 11 and are respectively fixedly connected with the transmitting and receiving circuit 11; the photodetector 16 is disposed within the optical darkroom 17.
The transmitting and receiving circuit 11 is used for driving the light emitting diode to obtain a modulated optical signal and transmitting the modulated optical signal, and the receiving circuit amplifies and filters the signal acquired by the photodetector 16; the photodetectors 16 are located at the center of the transmitting and receiving circuit 11, and the light emitting diodes are distributed in a circumferential array around the photodetectors 16 and welded on the transmitting and receiving circuit 11.
In order to reduce the volume of the device, in this embodiment, the packaged light emitting diodes with the smallest TO5.6mm model are selected, the power of each light emitting diode is 500mw, the divergence full angle is 120 degrees, the wavelength range is 450 nm-550 nm, and three light emitting diodes are used for improving the luminous flux of the device and realizing a large coverage area so as to facilitate underwater communication.
The temperature sensor 15 in this embodiment is used to monitor the internal temperature of the device, and in one implementation, the temperature sensor 15 may be integrated with a depth sensor on a circuit board, so as to monitor the internal temperature of the device and the underwater depth information; the photodetector 16 is used for collecting the received optical signal and converting the optical signal into an electrical signal, and for reducing the device volume, a TO type packaged photodetector with the smallest packaging volume is selected, and the photosensitive surface is 10mm 2 The spectrum range is 400 nm-700 nm of visible light; the optical camera 17 is external to the photodetector 16 and forms an optical camera together with a receiving lens (not shown) to prevent the emitted light signal of the device itself from impinging on the photodetector 16. The receiving lens is plated with optical films with different transmission wave bands and is used for distinguishing signal lights with different bidirectional communication.
The device uses a Light Emitting Diode (LED) as a light emitting source to perform large-angle coverage emission, uses a high-sensitivity photoelectric detector 16 to receive a signal beam, and based on the development of an optical communication technology and an integrated circuit, the Light Emitting Diode (LED) and the photoelectric detector 16 used in the device can be integrated on a small circuit board, and a high-speed AD sampling circuit and a high-speed analog-digital conversion circuit are used for completing real-time decoding and demodulation of communication signals and signal recovery.
Further, as shown in fig. 4, the rear end structure 2 includes: a communication interface 21, a vent valve 22, a device switch 23, and a voice interface 24; the rear structure 2 is mainly responsible for the interconnection between the device and other underwater equipment or the device and the diver.
Specifically, the communication interface 21 is used for being connected to other underwater equipment to realize mutual communication between underwater settings, and the communication interface 21 is an 8-core watertight connector or a 3-core watertight cable; the ventilation valve 22 is used for making the air pressure in the device lower than the air pressure outside the device in an air pumping mode so as to detect the tightness of the device; the device switch 23 is used for switching on or off the whole device, because the working environment of the device is underwater, the switching mode of the power supply selects a rotary type in consideration of the convenience of underwater operation, when the switch is rotated clockwise, the battery starts to supply power to the whole device, the whole device starts to work, and when the switch is rotated anticlockwise, the battery stops supplying power.
The voice interface 24 is connected to a voice device worn on the diver, the outside is connected with the earphone and the microphone of the diver, when the diver inputs voice through the microphone, voice signals are transmitted to a voice processing module of the device through a voice peripheral interface, the voice processing module is used for collecting, compressing, code modulating and other operations on the voice signals, voice analog signals are converted into digital signals, and the digital signals are transmitted through the signal processing circuit and the transmitting and receiving circuit and then transmitted through the LED; the communication interface 21, the ventilation valve 22, the device switch 23 and the voice interface 24 are respectively arranged at the bottom of the sealing structure and are respectively fixedly connected with the sealing structure.
Further, as shown in fig. 5 to 6, the metal seal ring 3 is made of aluminum alloy as a whole and is subjected to a hard oxidation treatment on the surface to provide higher hardness and corrosion resistance, and the metal seal ring 3 includes: a ring body (not labeled), a first rubber seal ring 32, and a second rubber seal ring 33; the metal sealing ring 3 of the device realizes watertight packaging of the device by a method of extruding the rubber ring.
Specifically, the first rubber seal ring 32 is disposed on the top surface of the ring body, and is embedded in a groove on the top surface of the ring body; the second rubber sealing ring 33 is arranged on the bottom side surface of the ring body and is embedded in the groove of the bottom side surface of the ring body.
The ring body is provided with 6 first screw hole sites 31 which are circumferentially arranged at the position corresponding to the front end structure 1, and the transparent acrylic front cover plate or the metal rear cover plate is fastened with the sealing ring through screws.
The height of the first rubber sealing ring 32 is slightly higher than the plane of the metal sealing ring 3, the first rubber sealing ring 32 deforms and fills gaps between the metal sealing ring 3 and the transparent acrylic cover plate or between the metal sealing ring and the transparent acrylic cover plate when being extruded by external force, and the gaps between the metal sealing ring 3 and the transparent acrylic cover plate or between the metal sealing ring and the transparent acrylic cover plate are smaller when being pressed under the action of water pressure due to the fact that the application scene of the device is that the underwater environment is the underwater environment, watertight packaging is achieved, and the device uses the better water tightness of the device due to the fact that the two rubber sealing rings are designed. The device can detect the air tightness of the device in the air by an air extraction method, and the device can work in an underwater environment after passing the air tightness detection.
The second rubber sealing ring 33 is used for sealing the circular side wall of the metal sealing ring 3 and the circular side wall of the acrylic, and the gap between the circular side wall of the metal sealing ring 3 and the circular side wall of the acrylic is filled in an extrusion mode, so that the water tightness of the device is improved by using two rubber sealing ring designs.
4 second screw hole sites 34 which are circumferentially distributed are arranged at the position of the ring body corresponding to the rear end structure 2; the second screw hole site 34 here is used for fixing the device back-end circuitry and the metal sealing ring 3.
Further, as shown in fig. 8 to 9, the circuit structure 4 includes: the device comprises a supporting structure 41, a voice processing module 44, a communication interface module 43, a lithium battery 42, a power supply voltage stabilizing module 45, a signal processing circuit 47, a signal display circuit 48 and a liquid crystal display screen 49; the circuit structure 4 is mainly responsible for communication signal modulation, signal processing, signal decoding and demodulation, signal recovery, signal display and power supply of the whole device.
In particular, the support structure 41 is fixedly connected to the ring body of the metal sealing ring 3; the voice processing module 44, the communication interface module 43, the lithium battery 42, the power supply voltage stabilizing module 45, the signal processing circuit 47, the signal display circuit 48 and the liquid crystal display 49 are respectively and fixedly connected with the supporting structure 41.
In this embodiment, the third screw hole site 46 on the supporting structure 41 corresponds to the second screw hole site 34 on the metal sealing ring 3, the supporting structure 41 and the metal sealing ring 3 are fixed by screws, the supporting structure 41 is divided into an upper hollow ring and a lower hollow ring for wiring, and the middle part is a flat plate of acrylic material for fixing various circuit boards of the device; the lithium battery 42 is used to power the entire device, outputting 12V, and a maximum output current of less than 1A.
The communication interface module 43 is connected to a communication interface on the metal back plate for transmitting or receiving signals; the communication interface module 43 needs to be connected with a voice peripheral interface on the metal back cover plate for connecting with a voice device worn by a diver, and also needs to be connected with the voice processing module 44 by the McBSP interface for transmitting voice signals; there is also a need for an 8-core water seal with LAN ports attached to the metal back plate for intercommunication between underwater equipment.
The invention is a protocol layer for constructing data transmission based on UART (Universal Asynchronous Receiver/Transmitter) serial communication and Ethernet communication protocols. Therefore, the STM32F407 and the LAN8720A are selected to realize connection between the signal processing circuit 47 and the communication interface module 43, and an ethernet module is integrated in the STM32F407, where the module includes a MAC802.3 controller, supports interfaces such as SMI and McBSP, and can select a required mode and function through the MAC controller.
A voice processing module 44, configured to receive or transmit a voice signal, and perform demodulation decoding; the invention selects MA24126 voice chip as voice processing module 44, which is a multi-code rate voice coding and decoding chip, the voice compression algorithm combines binary excitation, code excitation, multi-band excitation and other advantages, because the voice signal is a time-varying signal, the information quantity is small, and the voice signal is concentrated in a low frequency band, the MA24126 chip can divide short-time voice into a plurality of sub-bands, and makes judgment in each self-band. At the synthesis end, the speech synthesis filter is excited by adopting a mixed sequence of periodic pulse and random noise, so that high-quality regenerated speech can be obtained at a lower code rate.
The power supply voltage stabilizing module 45 is used for guaranteeing stable power supply of the device, a power supply system block diagram is shown in fig. 10, the power supply system block diagram comprises a plurality of circuits such as a differential power amplifier, a high-speed ADC (analog to digital converter), an FPGA (field programmable gate array), a voice processing module, a photoelectric detector, a transmitting and receiving circuit and the like, the total power supply of the system is a 32V lithium battery, wherein the voice processing module, the transmitting and receiving circuit, the high-speed ADC, the FPGA and the amplifying circuit are all 5V power supply, and therefore the 32V lithium battery is converted into 5V power supply by using PTN78060W as a switching voltage stabilizing power supply of the system. The use of a DC-DC boost module converts 5V to 28V to power the photodetector, and a portion of the high speed ADC circuitry requires 3.3V to power the high speed ADC, with TPS767D318 converting 5V to 3.3V.
The signal processing circuit 47 performs modulation encoding on the transmission initial signal, and performs decoding demodulation and signal recovery on the received signal; the signal display circuit 48 and the liquid crystal display 49 together form a display system of the device for displaying real-time communication pictures, image information, communication information and the like, and the device uses an ILI9341V miniaturized liquid crystal display produced by Shenzhen Qian-display technology Co., ltd, and an interface is a USB or SPI universal interface and is connected with the signal processing circuit.
The signal processing circuit 47 is a core hardware circuit part of the present invention, and performs modulation and coding on the transmission initial signal, and performs decoding and demodulation and signal recovery on the received signal. The invention selects Xilinx company product ZYNQ-7000, uses SOC (System On Chip) full-programmable system on chip, the signal processing circuit uses differential power amplifier, high-speed ADC conversion and FPGA processing algorithm to realize, and a dynamic soft decision module is added into FPGA or DSP to improve the stability of the system. The schematic diagram of the amplifier circuit of the signal processing system is shown in fig. 14, the schematic diagram of the high-speed D/a converter circuit of the signal processing system is shown in fig. 15, and the schematic diagram of the high-speed a/D converter circuit of the signal processing system is shown in fig. 16.
The device uses the lithium battery 42 for internal power supply, and the power consumption of the whole device can be very low due to the high photoelectric conversion efficiency of the light-emitting diode. In order to facilitate the underwater operation of the diver, the device is provided with the handheld handle 5, and the diver can realize real-time communication between the divers or between the divers and land staff. All functional components of the device can be assembled in a cylinder with the diameter of 52mm and the length of less than 140 mm.
Further, as shown in fig. 1, the hand-held handle 5 is disposed on a side surface of the sealing structure and is fixedly connected with the sealing structure; the volume of the device is only the size of a conventional water cup and is in a zero-buoyancy state under water, so that a diver can hold the device or wear the device on the head to perform mutual real-time underwater communication; the device can also be replaced by a soft rope which is hung on a diver or other underwater equipment to realize the short-range real-time underwater communication between the underwater equipment.
The invention performs watertight packaging design on the cylinder, and ensures that the device has good water tightness. Meanwhile, the handle of the device can be replaced by a head-wearing structure or a soft rope, and is arranged on the head of a diver or hung on the diver, so that the hands of the diver are liberated when the diver works underwater. The device uses light as a signal carrier to provide an underwater active lighting device, can provide underwater lighting when completing communication of underwater high-speed real-time communication, and improves the underwater visible distance of divers.
The device is designed with a voice device with a voice interface capable of being connected to a diver, and voice information of the diver during underwater operation can be transmitted to other divers or land staff in real time through the device. The device also has a communication interface which can be connected to other underwater equipment to finish underwater cooperative operation.
As shown in fig. 12, the working principle of the portable wearable underwater wireless optical communication device in this embodiment is as follows:
the transmitting end transmits communication signals or voice input voice information of a diver to a communication interface or a voice input interface of the metal back cover plate of the device through underwater equipment; the voice signal is converted into an initial signal through the voice processing module, and the communication signal is also converted into the initial signal through the communication interface module; the signal processing circuit performs modulation coding on the initial signal to change the initial signal into a modulated signal; the transmitting and receiving circuit loads communication content on the light beam to form an optical signal by controlling the on or off of the light emitting diode.
The device adopts an NRZ (Non-return-to-zero Code) coding mode to carry out amplitude modulation on light intensity, and in a linear working interval of the light emitting diode, a high-level modulation signal acts on the Light Emitting Diode (LED) to generate illumination representing 1, and a low-level modulation signal acts on the Light Emitting Diode (LED) to not generate illumination representing signal 0.
The receiving end collects the received optical signals by the photoelectric detector and converts the optical signals into electric signals; the transmitting and receiving circuit amplifies and filters the received electric signals; the signal processing circuit decodes and demodulates the received electric signal, recovers the signal, and divides the signal into 3 different signals of a graphics signal, a voice signal and a communication signal.
The voice signal and the graphic signal have obvious characteristics, the voice signal is a time-varying signal, the information quantity is small, the voice signal is concentrated in a low frequency band, a general working frequency band is 300 Hz-3.4 kHz, the voice signal can be easily extracted by using a filter, the graphic signal is a two-dimensional signal, the information quantity is large, the general working frequency band is 0-6.5 MHz, the voice signal and the image signal can be simultaneously transmitted by an underwater optical channel of the device, and different signal types are processed by using an FPGA in the device.
The signal display circuit processes the graphic signals and finally displays the graphic signals on a liquid crystal display screen of the device for observation by workers under water supply; the voice processing module processes the voice signal and finally reaches the diver to obtain voice content; and the communication interface module processes the communication signals and finally reaches other underwater equipment to carry out mutual communication among the underwater equipment.
The code modulation method of the optical communication system mainly comprises amplitude modulation, phase modulation and frequency modulation, and compared with the latter two modulation methods, the amplitude modulation is simpler, and the hardware is easy to realize, so that the code modulation method is widely applied to the optical communication system. The system adopts an NRZ coding mode to carry out amplitude modulation on the light intensity.
As shown in fig. 17, in the LD P-I linear section, a high-level (higher than the laser threshold) modulation signal is applied to the LD to generate a strong laser representative signal 1, and a low-level (lower than the laser threshold) modulation signal is applied to the LD to generate a laser representative signal 0.
The application layer adopts a coding mode to avoid the occurrence of a signal state of long connection '0'/'1', and improves the anti-interference capability of the system, and the method comprises the following steps:
original signal: 0 0 0 0 1 1 1 1;
receiving a signal: 1 1 0 1 1 1 0 0;
Encoding a signal: 01 01 01 01 10 10 10 10;
receiving a signal: 01 01 01 01 01 01 01 01;
the average optical power of the laser output is changed by adjusting the direct current bias of the driver, the amplitude of the alternating current component is adjusted, the extinction ratio of the optical signal is changed, and the quality of the laser output signal is improved by the common adjustment of the two components. According to the data provided by LD manufacturer, the maximum working current of laser is 1200mA, and the corresponding maximum working voltage is 5V. In order to avoid ageing phenomena that occur when the laser is operated at high bias voltages, the peak value of the modulation signal should be below this value.
Correspondingly, at a receiving end, an APD is used for receiving the optical signal and restoring the optical signal into an electric signal, telecommunication is judged through a fixed level threshold, the electric signal is converted by the stronger optical signal and then is higher than a threshold level corresponding signal 1, and the electric signal is converted by the no optical signal and then is lower than a threshold level corresponding signal 0.
The embodiment adopts the technical scheme and has the following effects:
the embodiment of the invention provides a miniaturized portable underwater wireless optical communication device, which is only provided with a water cup, can be conveniently held by a diver or worn on the body to carry out underwater operation, has high optical communication transmission bandwidth, and can achieve Gbps in a transmission rate block, so that the diver can complete high-speed real-time communication between the diver and the diver or between the diver and land staff.
Exemplary method
As shown in fig. 11, based on the above embodiment, the present embodiment further provides a portable wearable underwater wireless optical communication method.
In one implementation manner of the present embodiment, the portable wearable underwater wireless optical communication method includes the following steps:
step S100, a voice signal of a diver or a communication signal of underwater equipment is obtained through a transmitting end, the voice signal or the communication signal is initialized and modulated, and a processed optical signal is transmitted to a receiving end;
step S200, receiving, by the receiving end, the optical signal sent by the sending end, performing signal conversion, signal amplification and signal demodulation on the optical signal, and outputting a voice signal or transmitting the voice signal.
In this embodiment, the portable wearable underwater wireless optical communication method is implemented by the portable wearable underwater wireless optical communication device described above.
Specifically, in one implementation of the present embodiment, step S100 includes the steps of:
step S101, a voice signal input by voice of a diver or a communication signal of a communication interface is obtained;
step S102, converting the voice signal into an initial signal through a voice processing module or converting the communication signal into the initial signal through a communication interface module;
Step S103, modulating and encoding the initial signal through a signal processing circuit to obtain a modulated signal;
step S104, the transmitting and receiving circuit controls the on-off state of the light emitting diode, and the communication content is loaded on the light beam to form an optical signal;
step S105, the processed optical signal is sent to the receiving end.
In this embodiment, as shown in fig. 12, the transmitting end transmits a communication signal or voice input voice information of a diver to a communication interface or a voice input interface of the metal back cover plate of the device by using the underwater equipment; the voice signal is converted into an initial signal through the voice processing module, and the communication signal is also converted into the initial signal through the communication interface module; the signal processing circuit performs modulation coding on the initial signal to change the initial signal into a modulated signal; the transmitting and receiving circuit loads communication content on the light beam to form an optical signal by controlling the on or off of the light emitting diode.
Specifically, in one implementation of the present embodiment, step S200 includes the steps of:
step S201, collecting the received optical signals through a photoelectric detector and converting the optical signals into electric signals;
step S202, amplifying and filtering the received electric signals through a transmitting and receiving circuit;
Step S203, the received electric signals are decoded, demodulated and subjected to signal recovery processing by a signal processing circuit, and the signals are divided into graphic signals, voice signals and communication signals;
step S204, processing the graphic signal through a signal display circuit and displaying the graphic signal in a display screen;
step S205, processing the voice signal through a voice processing module to obtain voice content;
step S206, the communication signals are processed through the communication interface module, the processed communication signals are transmitted to other underwater equipment, and mutual communication among the underwater equipment is carried out.
In this embodiment, the voice interface of the device is connected to a voice device worn on the diver, the external is connected to the earphone and the microphone of the diver, when the diver inputs voice through the microphone, the voice signal is transmitted to the voice processing module of the device through the voice peripheral interface, the voice processing module performs operations such as collection, compression, code modulation and the like on the voice signal, the voice analog signal is converted into a digital signal, and the digital signal is transmitted through the signal processing circuit and the transmitting and receiving circuit and then transmitted through the LED.
The device adopts an NRZ (Non-return-to-zero Code) coding mode to carry out amplitude modulation on light intensity, and in a linear working interval of the light emitting diode, a high-level modulation signal acts on the Light Emitting Diode (LED) to generate illumination representing 1, and a low-level modulation signal acts on the Light Emitting Diode (LED) to not generate illumination representing signal 0.
The communication interface module of the device is connected to the communication interface on the metal back cover plate and is used for sending or receiving signals; the communication interface module is connected with a voice peripheral interface on the metal back cover plate and used for connecting a voice device worn by a diver, and the McBSP interface is connected with the voice processing module and used for transmitting voice signals; there is also a need for an 8-core water seal with LAN ports attached to the metal back plate for intercommunication between underwater equipment.
The invention is a protocol layer for constructing data transmission based on UART (Universal Asynchronous Receiver/Transmitter) serial communication and Ethernet communication protocols. Therefore, the STM32F407 and the LAN8720A are selected to realize the connection of the signal processing circuit and the communication interface module, the STM32F407 is internally integrated with an Ethernet module, the module comprises an MAC802.3 controller, interfaces such as SMI, mcBSP and the like are supported, and the required mode and function can be selected through the MAC controller.
The voice processing module of the device is used for receiving or transmitting voice signals and demodulating and decoding the voice signals; the invention selects MA24126 voice chip as voice processing module, which is a multi-code rate voice coding and decoding chip, the voice compression algorithm combines binary excitation, code excitation, multi-band excitation and other advantages, because the voice signal is a time-varying signal, the information quantity is small, the voice signal is concentrated in low frequency band, the MA24126 chip can divide short-time voice into a plurality of sub-bands, and the judgment is carried out in each self-band. At the synthesis end, the speech synthesis filter is excited by adopting a mixed sequence of periodic pulse and random noise, so that high-quality regenerated speech can be obtained at a lower code rate.
As shown in fig. 12, the receiving end collects the received optical signal by the photodetector and converts it into an electrical signal; the transmitting and receiving circuit amplifies and filters the received electric signals; the signal processing circuit decodes and demodulates the received electric signal, recovers the signal, and divides the signal into 3 different signals of a graphics signal, a voice signal and a communication signal.
The voice signal and the graphic signal have obvious characteristics, the voice signal is a time-varying signal, the information quantity is small, the voice signal is concentrated in a low frequency band, a general working frequency band is 300 Hz-3.4 kHz, the voice signal can be easily extracted by using a filter, the graphic signal is a two-dimensional signal, the information quantity is large, the general working frequency band is 0-6.5 MHz, the voice signal and the image signal can be simultaneously transmitted by an underwater optical channel of the device, and different signal types are processed by using an FPGA in the device.
The signal display circuit processes the graphic signals and finally displays the graphic signals on a liquid crystal display screen of the device for observation by workers under water supply; the voice processing module processes the voice signal and finally reaches the diver to obtain voice content; and the communication interface module processes the communication signals and finally reaches other underwater equipment to carry out mutual communication among the underwater equipment.
The signal processing circuit is a core hardware circuit part of the invention, and is used for modulating and coding the initial signal of transmission, decoding and demodulating the received signal and recovering the signal. The invention selects Xilinx company product ZYNQ-7000, uses SOC (System On Chip) full-programmable system on chip, the signal processing circuit uses differential power amplifier, high-speed ADC conversion and FPGA processing algorithm to realize, and a dynamic soft decision module is added into FPGA or DSP to improve the stability of the system. The schematic diagram of the amplifier circuit of the signal processing system is shown in fig. 14, the schematic diagram of the high-speed D/a converter circuit of the signal processing system is shown in fig. 15, and the schematic diagram of the high-speed a/D converter circuit of the signal processing system is shown in fig. 16.
In this embodiment, the underwater wireless optical communication uses light as a signal carrier, the optical power of the receiving end of the system determines the working distance of the system, the optical power Pr of the receiving end is related to the distance d of light beam propagation and the optical attenuation coefficient c (λ), meanwhile, the light beam is affected by the divergence angle, the divergence area is increased, the geometric loss of the light beam during underwater transmission is σ (d), and the formula of the received optical power of the system is obtained:
the geometrical loss of optical transmission is given by:
wherein Dr is the diameter of a condensing lens at a receiving end, dt is the diameter of a light source at a transmitting end, d is the transmission distance, and θ is the divergence angle of a light beam in water; the received optical power at different optical transmission distances is shown in fig. 13.
According to the invention, an LED with emission power of 1W and a divergence half angle of 65 degrees is selected as an emission light source, a Fresnel lens is used as an optical lens at a receiving end, and a photoelectric detector is arranged at a focus of the Fresnel lens. The optical power of the receiving end after 5 meters transmission is obtained through calculation, and the minimum optical power which can be detected by the photoelectric detector is met.
The device adopts an NRZ (Non-return-to-zero Code) coding mode to carry out amplitude modulation on light intensity, and in a linear working interval of the light emitting diode, a high-level modulation signal acts on the Light Emitting Diode (LED) to generate illumination representing 1, and a low-level modulation signal acts on the Light Emitting Diode (LED) to not generate illumination representing signal 0.
The signal display circuit processes the graphic signals and finally displays the graphic signals on a liquid crystal display screen of the device for observation by workers under water supply; the voice processing module processes the voice signal and finally reaches the diver to obtain voice content; and the communication interface module processes the communication signals and finally reaches other underwater equipment to carry out mutual communication among the underwater equipment.
The code modulation method of the optical communication system mainly comprises amplitude modulation, phase modulation and frequency modulation, and compared with the latter two modulation methods, the amplitude modulation is simpler, and the hardware is easy to realize, so that the code modulation method is widely applied to the optical communication system. The system adopts an NRZ coding mode to carry out amplitude modulation on the light intensity.
As shown in fig. 17, in the LD P-I linear section, a high-level (higher than the laser threshold) modulation signal is applied to the LD to generate a strong laser representative signal 1, and a low-level (lower than the laser threshold) modulation signal is applied to the LD to generate a laser representative signal 0.
The application layer adopts a coding mode to avoid the occurrence of a signal state of long connection '0'/'1', and improves the anti-interference capability of the system, and the method comprises the following steps:
original signal: 00 00 1 1 1 1;
receiving a signal: 1 10 1 1 10 0;
encoding a signal: 01 01 01 01 10 10 10 10;
receiving a signal: 01 01 01 01 01 01 01 01;
the average optical power of the laser output is changed by adjusting the direct current bias of the driver, the amplitude of the alternating current component is adjusted, the extinction ratio of the optical signal is changed, and the quality of the laser output signal is improved by the common adjustment of the two components. According to the data provided by LD manufacturer, the maximum working current of laser is 1200mA, and the corresponding maximum working voltage is 5V. In order to avoid ageing phenomena that occur when the laser is operated at high bias voltages, the peak value of the modulation signal should be below this value.
Correspondingly, at a receiving end, an APD is used for receiving the optical signal and restoring the optical signal into an electric signal, telecommunication is judged through a fixed level threshold, the electric signal is converted by the stronger optical signal and then is higher than a threshold level corresponding signal 1, and the electric signal is converted by the no optical signal and then is lower than a threshold level corresponding signal 0.
The embodiment adopts the technical scheme and has the following effects:
the embodiment uses the light emitting diode as a light emitting source to perform large-angle coverage emission, uses the high-sensitivity photoelectric detector to receive the signal light beam, and based on the development of the optical communication technology and the integrated circuit, the light emitting diode and the photoelectric detector used in the invention can be integrated on a small circuit board, and the high-speed AD sampling circuit and the high-speed analog-digital conversion circuit are used for completing the real-time decoding and demodulation of the communication signal and the signal recovery; the embodiment has the characteristic of high optical communication transmission bandwidth, and the transmission rate block can reach Gbps, so that a diver can complete high-speed real-time communication between the diver and the diver or between the diver and land staff.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of a computer program comprising instructions for the relevant hardware, the computer program being stored on a non-volatile storage medium, the computer program when executed comprising the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory.
In summary, the present invention provides a portable wearable underwater wireless optical communication device and method, including: comprising the following steps: the sealing structure is a transparent acrylic barrel-shaped structure; a front-end structure for transmitting optical signals and receiving optical signals; a back-end structure for communication between the optical communication device and other underwater equipment, or connection between the optical communication device and a diver; the metal sealing ring is used for realizing watertight packaging of the optical communication device in a manner of extruding the rubber ring; the circuit structure is used for communication signal modulation, signal processing, signal decoding and demodulation, signal recovery, signal display and power supply of the whole device of the optical communication device; the front end structure, the rear end structure, the metal sealing ring and the circuit structure are respectively arranged in the sealing structure and are respectively fixedly connected with the sealing structure. The invention provides a miniaturized portable underwater wireless optical communication device, which has the characteristic of high communication efficiency.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (13)
1. A portable wearable underwater wireless optical communication device, comprising:
the sealing structure is a transparent acrylic barrel-shaped structure;
a front-end structure for transmitting optical signals and receiving optical signals;
a back end structure for communication between the optical communication device and other underwater equipment, or connection between the optical communication device and a diver;
the metal sealing ring is used for realizing watertight packaging on the optical communication device in a manner of extruding the rubber ring;
the circuit structure is used for communication signal modulation, signal processing, signal decoding and demodulation, signal recovery, signal display and power supply of the whole device of the optical communication device;
the front end structure, the rear end structure, the metal sealing ring and the circuit structure are respectively arranged in the sealing structure and are respectively and fixedly connected with the sealing structure.
2. The portable wearable underwater wireless optical communication device of claim 1, wherein the front end structure comprises:
the device comprises a light emitting diode, a photoelectric detector, a temperature sensor, a transmitting and receiving circuit and an optical darkroom;
The transmitting and receiving circuit is arranged at the top of the sealing structure and is fixedly connected with the sealing structure;
the light emitting diode, the photoelectric detector, the temperature sensor and the optical darkroom are respectively arranged on the transmitting and receiving circuit and are respectively fixedly connected with the transmitting and receiving circuit; the photodetector is disposed within the optical dark chamber.
3. The portable wearable underwater wireless optical communication device of claim 2, wherein the photodetector is located at a center position of the transmitting-receiving circuit, and the light emitting diodes are distributed in a circumferential array around the photodetector.
4. The portable wearable underwater wireless optical communication device of claim 2, wherein the light emitting diode is a packaged diode of model to5.6 mm.
5. The portable wearable underwater wireless optical communication device of claim 2, wherein the photodetector is a TO-model packaged detector;
the photosensitive surface of the photoelectric detector is 10mm 2 The spectrum range is 400 nm-700 nm of visible light.
6. The portable wearable underwater wireless optical communication device of claim 1, wherein the back-end structure comprises:
Communication interface, vent valve, device switch, and voice interface;
the communication interface is used for being connected to other underwater equipment to realize mutual communication among underwater settings; the ventilation valve is used for enabling the air pressure in the device to be lower than the air pressure outside the device in an air extraction mode, so that the tightness of the device is detected; the device switch is used for switching on or off the whole device; the voice interface is connected to a voice device worn on the diver;
the communication interface, the ventilation valve, the device switch and the voice interface are respectively arranged at the bottom of the sealing structure and are respectively and fixedly connected with the sealing structure.
7. The portable wearable underwater wireless optical communication device of claim 1, wherein the metal seal ring comprises:
the device comprises a ring body, a first rubber sealing ring and a second rubber sealing ring;
the first rubber sealing ring is arranged on the top surface of the ring body and is embedded in a groove on the top surface of the ring body;
the second rubber sealing ring is arranged on the side surface of the bottom of the ring body and is embedded in the groove on the side surface of the bottom of the ring body.
8. The portable wearable underwater wireless optical communication device of claim 1, wherein the circuit structure comprises:
The device comprises a supporting structure, a voice processing module, a communication interface module, a lithium battery, a power supply voltage stabilizing module, a signal processing circuit, a signal display circuit and a liquid crystal display screen;
the support structure is fixedly connected with the ring body of the metal sealing ring; the voice processing module, the communication interface module, the lithium battery, the power supply voltage stabilizing module, the signal processing circuit, the signal display circuit and the liquid crystal display screen are respectively and fixedly connected with the supporting structure.
9. The portable wearable underwater wireless optical communication device of claim 1, further comprising:
the handheld handle is arranged on the side face of the sealing structure and is fixedly connected with the sealing structure.
10. A portable wearable underwater wireless optical communication method, comprising:
the method comprises the steps that a sending end obtains a voice signal of a diver or a communication signal of underwater equipment, initializes and modulates the voice signal or the communication signal, and sends the processed optical signal to a receiving end;
and receiving the optical signal sent by the sending end through the receiving end, performing signal conversion, signal amplification and signal demodulation processing on the optical signal, and outputting a voice signal or transmitting the voice signal.
11. The portable wearable underwater wireless optical communication method of claim 10, wherein the acquiring, by the transmitting end, a voice signal of a diver or a communication signal of an underwater device, initializing and modulating the voice signal or the communication signal, and transmitting the processed optical signal to the receiving end comprises:
acquiring a voice signal input by a diver or a communication signal of a communication interface;
the voice signal is converted into an initial signal through a voice processing module, or the communication signal is converted into the initial signal through a communication interface module;
modulating and encoding the initial signal through a signal processing circuit to obtain a modulated signal;
the transmitting and receiving circuit controls the on-off state of the light emitting diode, and the communication content is loaded on the light beam to form an optical signal;
and sending the processed optical signal to a receiving end.
12. The portable underwater wireless optical communication method of claim 10, wherein the receiving the optical signal transmitted from the transmitting terminal through the receiving terminal, performing signal conversion, signal amplification and signal demodulation processing on the optical signal, and outputting a voice signal or transmitting the voice signal, comprises:
Collecting the received optical signals through a photoelectric detector and converting the optical signals into electric signals;
amplifying and filtering the received electric signals through a transmitting and receiving circuit;
the received electric signals are decoded, demodulated and subjected to signal recovery processing by a signal processing circuit, and the signals are divided into graphic signals, voice signals and communication signals;
processing the graphic signal through a signal display circuit and displaying the graphic signal in a display screen;
and processing the voice signal through a voice processing module to obtain voice content.
13. The portable wearable underwater wireless optical communication method of claim 12, wherein the received electric signal is decoded and demodulated by a signal processing circuit, signal recovery processing is performed to divide the signal into a graphic signal, a voice signal and a communication signal, and further comprising:
and processing the communication signals through the communication interface module, and transmitting the processed communication signals to other underwater equipment to perform mutual communication among the underwater equipment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117200901A (en) * | 2023-11-07 | 2023-12-08 | 中国人民解放军总医院第一医学中心 | Underwater signal transmission system based on split type diving mouthpiece capable of actively applying force |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108986827A (en) * | 2018-06-21 | 2018-12-11 | 大连理工大学 | A kind of speech underwater live transmission method based on LiFi optic communication |
| CN111211845A (en) * | 2019-12-31 | 2020-05-29 | 中国船舶重工集团公司第七一三研究所 | Underwater wireless optical communication and imaging detection integrated device |
| CN215912097U (en) * | 2021-07-16 | 2022-02-25 | 重庆前卫科技集团有限公司 | Portable underwater visible light communication equipment, transmitting assembly and receiving assembly |
-
2023
- 2023-04-20 CN CN202310428749.5A patent/CN116170031A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108986827A (en) * | 2018-06-21 | 2018-12-11 | 大连理工大学 | A kind of speech underwater live transmission method based on LiFi optic communication |
| CN111211845A (en) * | 2019-12-31 | 2020-05-29 | 中国船舶重工集团公司第七一三研究所 | Underwater wireless optical communication and imaging detection integrated device |
| CN215912097U (en) * | 2021-07-16 | 2022-02-25 | 重庆前卫科技集团有限公司 | Portable underwater visible light communication equipment, transmitting assembly and receiving assembly |
Non-Patent Citations (4)
| Title |
|---|
| LIANG YANG; QI ZHU; SAI LI; IMRAN SHAFIQUE ANSARI; SIYUAN YU: "On the Performance of Mixed FSO-UWOC Dual-Hop Transmission Systems", 《IEEE WIRELESS COMMUNICATIONS LETTERS 》, vol. 10, no. 9, pages 2041, XP011875986, DOI: 10.1109/LWC.2021.3091429 * |
| 吕斌斌; 林酩涞; 万鑫: "水下可见光通信在水下作战体系中的应用设想", 《水下无人系统学报》, vol. 30, no. 6, pages 787 - 793 * |
| 李丽: "基于蓝光LED的便携式水下视频通信系统", 《万方硕士论文 南京邮电大学2014》 * |
| 铁道部武汉工程机械厂、华中工学院著: "《建筑玻璃加工技术 玻璃镀膜真空技术》", vol. 978, 华南理工大学出版社, pages: 176 - 104 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117200901A (en) * | 2023-11-07 | 2023-12-08 | 中国人民解放军总医院第一医学中心 | Underwater signal transmission system based on split type diving mouthpiece capable of actively applying force |
| CN117200901B (en) * | 2023-11-07 | 2024-02-02 | 中国人民解放军总医院第一医学中心 | Underwater signal transmission system based on split type diving mouthpiece capable of actively applying force |
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