Underwater wireless optical multi-node cascade communication system and communication method thereof

Abstract

The invention belongs to the field of communication, and particularly relates to an underwater wireless optical multi-node cascade communication system and a communication method thereof. The FPGA (1) is used for providing baseband signals and processing information; the digital-to-analog conversion module (2) is used for converting a baseband digital signal into an analog signal; the laser emitting unit (3) is used for emitting signal light; the photoelectric detector (4) is used for converting an optical signal loaded with information into an electric signal; the analog-to-digital conversion module (5) is used for converting an analog signal into a digital signal; the servo turntable (6) is used for controlling the laser emission unit (2) and the photoelectric detector (4) to rotate in the horizontal direction; and the underwater sealed cabin (7) is made of a transparent material and is used for ensuring that the electronic devices can normally work in an underwater environment. According to the invention, cascade communication among multiple underwater nodes is realized.

Description

Technical Field

[0001] The invention belongs to the field of communications, and in particular relates to an underwater wireless optical multi-node cascade communication system and a communication method thereof. Background Art

[0002] Guided torpedoes usually use acoustic guidance to strike underwater targets, and there are many defensive sonar countermeasures equipment to deal with torpedoes. Among them, self-propelled decoys are a type of sonar countermeasures equipment that can be used to interfere with or deceive the opponent's sonar and acoustic self-guided torpedoes. When in use, they are launched into the sea by a projector or torpedo tube, and self-propel in a specified direction to simulate a real moving submarine. With the rapid development of torpedo technologies such as propulsion power, navigation positioning, detection and identification capabilities, and noise reduction levels, modern torpedoes have a high degree of intelligence and good quietness. Their anti-interference capabilities, target capture / identification capabilities, re-planning capabilities, information processing and interaction capabilities are constantly improving, which places higher and higher requirements on self-propelled decoys. The traditional use of a single acoustic decoy to counter torpedoes has a short confrontation time and poor confrontation effect, and can no longer fully meet the application requirements of modern sonar countermeasures. Summary of the invention

[0003] The present invention provides an underwater wireless optical multi-node cascade communication system to realize cascade communication between multiple underwater nodes.

[0004] The present invention provides an autonomous and controllable networking of a self-propelled decoy to solve the problem that a new type of intelligent torpedo is difficult to induce and intercept.

[0005] The present invention is achieved through the following technical solutions:

[0006] An underwater wireless optical multi-node cascade communication system, the communication system includes a plurality of communication nodes, the communication nodes are cascaded, each of the communication nodes includes an FPGA 1, a digital-to-analog conversion module 2, a laser emission unit 3, a photoelectric detector 4, an analog-to-digital conversion module 5, a servo turntable 6 and an underwater sealed cabin 7;

[0007] The FPGA1 is used to provide baseband signal and information processing;

[0008] The digital-to-analog conversion module 2 is used to convert the baseband digital signal into an analog signal;

[0009] The laser emitting unit 3 is used to emit signal light;

[0010] The photodetector 4 is used to convert the optical signal carrying information into an electrical signal;

[0011] The analog-to-digital conversion module 5 is used to convert the analog signal into a digital signal;

[0012] The servo turntable 6 is used to control the rotation of the laser emitting unit 2 and the photoelectric detector 4 in the horizontal direction;

[0013] The underwater sealed cabin 7 is an underwater sealed cabin made of transparent material, and is used to ensure that the above-mentioned electronic devices can work normally in an underwater environment.

[0014] An underwater wireless optical multi-node cascade communication system, wherein an underwater sealed cabin 7 is equipped with an FPGA 1, a digital-to-analog conversion module 2, a laser emitting unit 3, a photoelectric detector 4, an analog-to-digital conversion module 5 and a servo turntable 6;

[0015] The FPGA 1 transmits the signal to the digital-to-analog conversion module 2, the digital-to-analog conversion module 2 transmits the signal to the laser emitting unit 3, the laser emitting unit 3 emits the signal, the photodetector 4 detects and receives the signal, and transmits the received signal to the analog-to-digital conversion module 5, and the analog-to-digital conversion module 5 converts the signal and transmits it to the next communication module.

[0016] An underwater wireless optical multi-node cascade communication method, the communication method using the underwater wireless optical multi-node cascade communication system as claimed in claim 1 or 2; the communication method comprises the following steps:

[0017] Step 1: The digital baseband signal generated by the FPGA in node A controls the laser emitting unit 3 to emit a light beam loaded with the baseband signal;

[0018] Step 2: The photodetector in node B receives the light beam with baseband signal emitted by node A, and then converts it into a digital signal and transmits it to the FPGA in node B;

[0019] Step 3: The FPGA in node B sends a baseband signal and carries the baseband signal of node A to the laser beam, which is transmitted through the underwater channel. The photoelectric detector in node C receives the analog optical signal emitted by node B.

[0020] Step 4: The FPGA in node C processes and analyzes the information of nodes A and B.

[0021] Step 5: Repeat steps 1-4 to achieve cascade interconnection of communication nodes between underwater channels.

[0022] An underwater wireless optical multi-node cascade communication system, in which the digital baseband signal generated by the FPGA in node A in step 1 controls the laser emitting unit 3 to emit a light beam loaded with the baseband signal. Specifically, the FPGA in node A generates a digital baseband signal, which is transmitted to the digital-to-analog conversion module in node A through a data line, and then the digital baseband signal is converted into an analog signal. The analog signal is transmitted to the driving module in the laser emitting unit in node A through the data line, and the driving module is used to load the analog signal to the laser emitting unit, and the laser emitting unit in node A emits a light beam loaded with the baseband signal.

[0023] A method for underwater wireless optical multi-node cascade communication, in which the photoelectric detector in node B receives the light beam with a baseband signal emitted by node A, and then converts it into a digital signal and transmits it to the FPGA in node B. Specifically, the photoelectric detector in node B receives the baseband signal emitted by node A, and converts the optical signal into an electrical signal, which is transmitted to the module analog-to-digital conversion module in node B via a data line, and the analog-to-digital conversion module converts the received analog baseband signal into a digital signal, which is transmitted to the FPGA in node B via a data line, and the signal is processed.

[0024] A method for underwater wireless optical multi-node cascade communication, in step 3, the FPGA in node B sends a baseband signal and carries the baseband signal of node A to a laser beam, which is transmitted through an underwater channel, and the photoelectric detector in node C receives the analog optical signal emitted by node B. Specifically, the FPGA in node B transmits the baseband signal information sent by node A to a digital-to-analog conversion module in node B, and converts the digital signal into an analog signal again. The analog signal is transmitted to a laser emitting unit in node B via a data line. Under the loading action of a driving module, the laser emitting unit loads the digital signal onto a laser beam and emits it. After being transmitted through an underwater channel, the photoelectric detector in node C receives the analog optical signal emitted by node B, and converts the signal into an electrical signal again.

[0025] A method for underwater wireless optical multi-node cascade communication, specifically, in step 4, the FPGA in node C processes and analyzes the information containing node A and node B. Specifically, the photoelectric detector in node C receives the analog optical signal emitted by node B, and converts the signal into an electrical signal again. The analog electrical signal is transmitted to the analog-to-digital conversion unit of node C, which converts the analog signal into a digital signal, and then transmits it to the FPGA of node C to process and analyze the information containing node A and node B.

[0026] An underwater wireless optical multi-node cascade communication method, each time passing through a node, the FPGA of the current node directly processes all signals when processing signals and merges them with the newly generated digital baseband signal to form a new signal containing digital baseband signals of multiple nodes.

[0027] A multi-node cascade communication link is applied to multi-node cascade communication based on underwater wireless light.

[0028] An autonomous and controllable network of a self-propelled bait, wherein the autonomous and controllable network applies an underwater wireless optical multi-node cascade communication system to achieve close-range rapid communication between multiple nodes in an underwater environment.

[0029] The beneficial effects of the present invention are:

[0030] The present invention adopts a method of combining a self-propelled bait with underwater wireless optical communication to achieve cascade communication between multiple underwater nodes.

[0031] The present invention can realize the interconnection between underwater nodes, build an independent intelligent networking layout, and effectively resist the interception and confrontation of underwater intelligent guided torpedoes.

[0032] The present invention can also construct a high-speed, safe and concealed wireless information transmission link in a short-range range for an underwater detection network. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the node structure of the present invention.

[0034] Figure 2 It is a schematic diagram of a multi-node cascade communication system of the present invention. DETAILED DESCRIPTION

[0035] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0036] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0037] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0038] The following is attached to this application specification Figure 1-2 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] An underwater wireless optical multi-node cascade communication system, the communication system includes a plurality of communication nodes, the communication nodes are cascaded, each of the communication nodes includes an FPGA 1, a digital-to-analog conversion module 2, a laser emission unit 3, a photoelectric detector 4, an analog-to-digital conversion module 5, a servo turntable 6 and an underwater sealed cabin 7;

[0041] The FPGA1 is used to provide baseband signal and information processing;

[0042] The digital-to-analog conversion module 2 is used to convert the baseband digital signal into an analog signal;

[0043] The laser emitting unit 3 is used to emit signal light;

[0044] The photodetector 4 is used to convert the optical signal carrying information into an electrical signal;

[0045] The analog-to-digital conversion module 5 is used to convert the analog signal into a digital signal;

[0046] The servo turntable 6 is used to control the rotation of the laser emitting unit 2 and the photoelectric detector 4 in the horizontal direction;

[0047] The underwater sealed cabin 7 is an underwater sealed cabin made of transparent material, and is used to ensure that the above-mentioned electronic devices can work normally in an underwater environment.

[0048] An underwater wireless optical multi-node cascade communication system, wherein an underwater sealed cabin 7 is equipped with an FPGA 1, a digital-to-analog conversion module 2, a laser emitting unit 3, a photoelectric detector 4, an analog-to-digital conversion module 5 and a servo turntable 6;

[0049] The FPGA 1 transmits the signal to the digital-to-analog conversion module 2, the digital-to-analog conversion module 2 transmits the signal to the laser emitting unit 3, the laser emitting unit 3 emits the signal, the photodetector 4 detects and receives the signal, and transmits the received signal to the analog-to-digital conversion module 5, and the analog-to-digital conversion module 5 converts the signal and transmits it to the next communication module.

[0050] An underwater wireless optical multi-node cascade communication method, the communication method using the underwater wireless optical multi-node cascade communication system as claimed in claim 1 or 2; the communication method comprises the following steps:

[0051] Step 1: The digital baseband signal generated by the FPGA in node A controls the laser emitting unit 3 to emit a light beam loaded with the baseband signal;

[0052] Step 2: The photodetector in node B receives the light beam with baseband signal emitted by node A, and then converts it into a digital signal and transmits it to the FPGA in node B;

[0053] Step 3: The FPGA in node B sends a baseband signal and carries the baseband signal of node A to the laser beam, which is transmitted through the underwater channel. The photoelectric detector in node C receives the analog optical signal emitted by node B.

[0054] Step 4: The FPGA in node C processes and analyzes the information of nodes A and B.

[0055] Step 5: Repeat steps 1-4 to achieve cascaded intercommunication between communication nodes in underwater channels, and construct a multi-node cascaded communication link based on underwater wireless optical communication.

[0056] An underwater wireless optical multi-node cascade communication system, in which the digital baseband signal generated by the FPGA in node A in step 1 controls the laser emitting unit 3 to emit a light beam loaded with the baseband signal. Specifically, the FPGA in node A generates a digital baseband signal, which is transmitted to the digital-to-analog conversion module in node A through a data line, and then the digital baseband signal is converted into an analog signal. The analog signal is transmitted to the driving module in the laser emitting unit in node A through the data line, and the driving module is used to load the analog signal to the laser emitting unit, and the laser emitting unit in node A emits a light beam loaded with the baseband signal.

[0057] A method for underwater wireless optical multi-node cascade communication, in which the photoelectric detector in node B receives the light beam with a baseband signal emitted by node A, and then converts it into a digital signal and transmits it to the FPGA in node B. Specifically, the photoelectric detector in node B receives the baseband signal emitted by node A, and converts the optical signal into an electrical signal, which is transmitted to the module analog-to-digital conversion module in node B via a data line, and the analog-to-digital conversion module converts the received analog baseband signal into a digital signal, which is transmitted to the FPGA in node B via a data line, and the signal is processed.

[0058] A method for underwater wireless optical multi-node cascade communication, in step 3, the FPGA in node B sends a baseband signal and carries the baseband signal of node A to a laser beam, which is transmitted through an underwater channel, and the photoelectric detector in node C receives the analog optical signal emitted by node B. Specifically, the FPGA in node B transmits the baseband signal information sent by node A to a digital-to-analog conversion module in node B, and converts the digital signal into an analog signal again. The analog signal is transmitted to a laser emitting unit in node B via a data line. Under the loading action of a driving module, the laser emitting unit loads the digital signal onto a laser beam and emits it. After being transmitted through an underwater channel, the photoelectric detector in node C receives the analog optical signal emitted by node B, and converts the signal into an electrical signal again.

[0059] A method for underwater wireless optical multi-node cascade communication, specifically, in step 4, the FPGA in node C processes and analyzes the information containing node A and node B. Specifically, the photoelectric detector in node C receives the analog optical signal emitted by node B, and converts the signal into an electrical signal again. The analog electrical signal is transmitted to the analog-to-digital conversion unit of node C, which converts the analog signal into a digital signal, and then transmits it to the FPGA of node C to process and analyze the information containing node A and node B.

[0060] An underwater wireless optical multi-node cascade communication method, each time passing through a node, the FPGA of the current node directly processes all signals when processing signals and merges them with the newly generated digital baseband signal to form a new signal containing digital baseband signals of multiple nodes.

[0061] A multi-node cascade communication link is applied to multi-node cascade communication based on underwater wireless light.

[0062] An autonomous and controllable network of self-propelled decoys, which uses an underwater wireless optical multi-node cascade communication system to achieve close-range rapid communication between multiple nodes in an underwater environment. According to different real-time situations, corresponding interception and guidance schemes are constructed to greatly improve the guidance and interception probability of active strike equipment such as intelligent torpedoes.

[0063] Several self-propelled decoys are installed in the underwater unmanned submersible, and each self-propelled decoy is equipped with the attached Figure 1 The underwater wireless optical multi-node cascade communication device shown in the figure, when the underwater unmanned submersible finds that it is being tracked by active strike equipment, it quickly releases the self-propelled bait and quickly leaves. The self-propelled bait can use the underwater wireless optical multi-node cascade communication device to interact with nodes, combine with the motion trajectory of the active strike equipment, set their own spatial networking positions, and communicate information through the underwater wireless optical multi-node cascade communication device to complete the autonomous networking of the self-propelled bait and implement induced interception of the active strike equipment.

Claims

1. An underwater wireless optical multi-node cascade communication system, characterized in that: The communication system comprises a plurality of communication nodes, the communication nodes are cascaded, and each of the communication nodes comprises an FPGA (1), a digital-to-analog conversion module (2), a laser emission unit (3), a photoelectric detector (4), an analog-to-digital conversion module (5), a servo turntable (6) and an underwater sealed cabin (7); The FPGA (1) is used to provide baseband signal and information processing; The digital-to-analog conversion module (2) is used to convert the baseband digital signal into an analog signal; The laser emitting unit (3) is used to emit signal light; The photoelectric detector (4) is used to convert the optical signal carrying information into an electrical signal; The analog-to-digital conversion module (5) is used to convert the analog signal into a digital signal; The servo turntable (6) is used to control the rotation of the laser emitting unit (2) and the photoelectric detector (4) in the horizontal direction; The underwater sealed cabin (7) is an underwater sealed cabin made of transparent material and is used to ensure that the above-mentioned electronic devices can work normally in an underwater environment.

2. According to claim 1, an underwater wireless optical multi-node cascade communication system is characterized in that: The underwater sealed cabin (7) is equipped with an FPGA (1), a digital-to-analog conversion module (2), a laser emitting unit (3), a photoelectric detector (4), an analog-to-digital conversion module (5) and a servo turntable (6); The FPGA (1) transmits the signal to the digital-to-analog conversion module (2), the digital-to-analog conversion module (2) transmits the signal to the laser emitting unit (3), the laser emitting unit (3) emits the signal, the photoelectric detector (4) detects and receives the signal, and transmits the received signal to the analog-to-digital conversion module (5), and the analog-to-digital conversion module (5) converts the signal and transmits it to the next communication module.

3. An underwater wireless optical multi-node cascade communication method, characterized in that: The communication method uses the underwater wireless optical multi-node cascade communication system as claimed in claim 1 or 2; the communication method comprises the following steps: Step 1: The digital baseband signal generated by the FPGA in node A controls the laser emitting unit 3 to emit a light beam loaded with the baseband signal; Step 2: The photodetector in node B receives the light beam with baseband signal emitted by node A, and then converts it into a digital signal and transmits it to the FPGA in node B; Step 3: The FPGA in node B sends a baseband signal and carries the baseband signal of node A to the laser beam, which is transmitted through the underwater channel. The photoelectric detector in node C receives the analog optical signal emitted by node B. Step 4: The FPGA in node C processes and analyzes the information of nodes A and B. Step 5: Repeat steps 1-4 to achieve cascade interconnection of communication nodes between underwater channels.

4. According to claim 3, an underwater wireless optical multi-node cascade communication system is characterized in that: Specifically, the step 1 is as follows: the FPGA in node A generates a digital baseband signal, which is transmitted to the digital-to-analog conversion module in node A via a data line and then converted into an analog signal. The analog signal is transmitted to the driving module in the laser emitting unit in node A via a data line, and the driving module is used to load the analog signal into the laser emitting unit, and the laser emitting unit in node A emits a light beam loaded with the baseband signal.

5. According to claim 3, the underwater wireless optical multi-node cascade communication method is characterized in that: Specifically, the photodetector in node B receives the baseband signal transmitted by node A and converts the optical signal into an electrical signal. The electrical signal is transmitted to the analog-to-digital conversion module in node B via a data line. The analog-to-digital conversion module converts the received analog baseband signal into a digital signal. The digital signal is transmitted to the FPGA in node B via a data line to perform signal processing on the signal.

6. According to claim 3, the underwater wireless optical multi-node cascade communication method is characterized in that: Specifically, the step 3 is that the FPGA in node B transmits the baseband signal information sent by node A to the digital-to-analog conversion module in node B, and converts the digital signal into an analog signal again. The analog signal is transmitted to the laser emitting unit in node B via the data line. Under the loading action of the driving module, the laser emitting unit loads the digital signal onto the laser beam and emits it. After being transmitted through the underwater channel, the analog optical signal emitted by node B is received by the photoelectric detector in node C, and the signal is converted into an electrical signal again.

7. According to claim 3, the underwater wireless optical multi-node cascade communication method is characterized in that: Specifically, step 4 is that the photodetector in node C receives the analog light signal emitted by node B, and converts the signal into an electrical signal again. The analog electrical signal is transmitted to the analog-to-digital conversion unit of node C, which converts the analog signal into a digital signal, and then transmits it to the FPGA of node C to process and analyze the information containing nodes A and B.

8. According to claim 3, the underwater wireless optical multi-node cascade communication method is characterized in that: Each time it passes through a node, the FPGA of the current node will directly process all signals when processing the signal and merge them with the newly generated digital baseband signal to form a new signal containing digital baseband signals of multiple nodes.

9. A multi-node cascade communication link, characterized in that: Applied to multi-node cascade communication based on underwater wireless light.

10. An autonomous and controllable network of a self-propelled decoy, characterized in that: The autonomous and controllable networking applies an underwater wireless optical multi-node cascade communication system to achieve close-range rapid communication between multiple nodes in an underwater environment.

Images