CN108833022B - Sea wave height self-adaptive underwater communication system with communication and ranging shared optical system - Google Patents
Sea wave height self-adaptive underwater communication system with communication and ranging shared optical system Download PDFInfo
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- CN108833022B CN108833022B CN201810370153.3A CN201810370153A CN108833022B CN 108833022 B CN108833022 B CN 108833022B CN 201810370153 A CN201810370153 A CN 201810370153A CN 108833022 B CN108833022 B CN 108833022B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4818—Constructional features, e.g. arrangements of optical elements using optical fibres
Abstract
A sea wave height self-adaptive underwater communication system of a communication and ranging shared optical system belongs to the field of space laser communication and aims to solve the problems that self-adaptive adjustment of sea waves cannot be realized in the prior art, a laser ranging module and a communication module are independent, the volume and the weight are large, and the structure is complex; the distance measuring light beam is reflected by the sea surface and then received by the laser distance measuring receiver and converted into an electric signal, the electric signal is transmitted to the data processing system to calculate the height of the sea level in real time, the information is fed back to the controller, the controller controls the motor to drive and change the focal length of the shared zoom system, and then the laser distance measuring light beam and the position of the underwater communication light beam focused by the laser excitation are adjusted to form closed-loop control.
Description
Technical Field
The invention belongs to the field of space laser communication, and particularly relates to a sea wave height self-adaptive underwater communication system of a communication and ranging shared optical system.
Background
The submarine is an important component of modern military strength, the concealment and the safety are main targets of the aerospace field for the submarine communication, the laser sound-induced underwater communication technology combines the advantages of small transmission loss of infrared laser in the atmosphere and small attenuation of sound waves in seawater, and the submarine has wide application prospects in the field of underwater communication.
The laser induced acoustic communication is realized by carrying a high-power infrared laser by using an aerospace platform, a modulated laser signal emitted by the aerospace platform is focused under the sea surface and excites an acoustic wave signal, an underwater target receives the acoustic wave signal and recovers carried coding information, and the laser induced acoustic communication in a sea-air channel is realized. Laser induced acoustic underwater communication requires that a light spot is focused at a certain position underwater in order to ensure that the efficiency of photoacoustic energy conversion is highest. Due to the influences of sea wave surge, load platform jolt and the like, the light spot focusing position of the laser sound-producing system cannot be guaranteed to be at an ideal depth, the communication performance of the laser sound-producing system is influenced, and the laser sound-producing system cannot work under severe conditions, so that the breakdown position needs to be adjusted according to the height of the load platform and the height of sea waves.
The Chinese patent publication No. CN204559587U entitled laser frequency hopping underwater acoustic digital communication system combines atmospheric optical communication and underwater acoustic communication, utilizes a laser frequency hopping technology, controls a laser to emit laser by loading information on codes formed by different repetition frequency frames, and makes laser energy reach the water surface through atmospheric transmission and interact with a water medium in a gasification or breakdown mode, thereby converting light wave energy into sound wave energy to be transmitted in different directions underwater. Since it does not take into account the change in the sea height, it is not possible to achieve an adaptive adjustment of the sea height.
Disclosure of Invention
The invention provides a sea wave height self-adaptive laser-induced acoustic underwater communication system with an optical system shared by communication and ranging, which aims to solve the problems that in the prior art, a communication system cannot realize self-adaptive adjustment of sea waves, a laser ranging module and a communication module are independent, the volume and the weight are large, and the structure is complex in the laser-induced acoustic underwater communication process.
The technical scheme for solving the technical problem is as follows:
the communication and ranging shared optical system sea wave height self-adaptive underwater communication system is characterized by comprising a laser ranging transmitter, a laser communication transmitter, a shared zooming system, a laser ranging receiver, a controller, a data processing system, a motor and a two-in-one multiplexing optical fiber; the distance measuring light emitted by the laser distance measuring transmitter and the communication light emitted by the laser communication transmitter are respectively optically coupled to two branches at one end of the two-in-one multiplexing optical fiber, are compounded into one branch through the two-in-one multiplexing optical fiber to be output as a light source, and are emitted through a common zoom system together to finally focus on a far field sea level or a specific laser breakdown depth position below the sea level; the seawater can be punctured due to high laser communication transmitting power, and then the sound wave signal is excited to carry out communication; the distance measuring light beam returns along the light path after being reflected by the sea surface, the laser distance measuring receiver receives the light signal and converts the light signal into an electric signal, the electric signal is transmitted to the data processing system to calculate the height of the sea surface in real time, the information is fed back to the controller, the controller controls the motor to drive and change the focal length of the shared zooming system, the focusing positions of the laser distance measuring light beam and the laser-excited underwater communication light beam are adjusted, closed-loop control is formed, and the convergence point of the laser distance measuring light beam and the laser-excited underwater communication light beam is guaranteed to be always stabilized at the position of sea water.
The system comprises a laser ranging emitter, a laser communication emitter, a shared zooming system, a laser ranging receiver, a controller, a data processing system, a motor and a two-in-one multiplexing optical fiber; the distance measuring light emitted by the laser distance measuring emitter and the communication emitted by the laser communication emitter are respectively optically coupled to two branches at one end of the two-in-one composite optical fiber, and are compounded into one branch through the two-in-one multiplexing optical fiber to be output as a light source, and then the two branches are emitted through a common zoom system together and reflected by a reflector to finally focus on a far field sea level or a specific laser breakdown depth position below the sea level; the seawater can be punctured due to high laser communication transmitting power, and then the sound wave signal is excited to carry out communication; the distance measuring light beam returns along the light path after being reflected by the sea surface, is reflected by the reflector, receives the light signal by the laser distance measuring receiver and converts the light signal into an electric signal, the electric signal is transmitted to the data processing system to calculate the height of the sea surface in real time, and then the information is fed back to the controller, the controller controls the motor to drive and change the focal length of the shared zoom system, so that the focusing positions of the laser distance measuring light beam and the laser-excited underwater communication light beam are adjusted, closed-loop control is formed, and the convergence point of the laser distance measuring light beam and the laser-excited underwater communication light beam is ensured to be always.
The invention has the beneficial effects that:
the invention provides a method for measuring the height of a load platform and the sea level in real time by adopting laser ranging, and the method and the system form a closed loop with a zoom system, thereby ensuring the stability of a laser seawater breakdown position and realizing the self-adaptive adjustment of the sea wave height.
The two-in-one multiplexing optical fiber and the shared zoom system are adopted, the same optical system is shared by laser ranging transmission and laser communication transmission, and the overall size and weight of the system are greatly reduced.
By adopting the shared zooming optical system, the laser ranging emission beam is always focused near the sea surface, rather than being a divergent large light spot on the surface of the object to be measured like the common laser ranging emission beam, so that the reflected energy of the sea surface is concentrated, the requirement on the ranging emission power is reduced, and the system is further low in power consumption and light and small.
The achromatic system is designed particularly for common laser communication and laser ranging working bands of 1064nm,1550nm and the like, and the applicable working wavelength of the system is widened.
Drawings
Fig. 1 is a schematic structural diagram of an adaptive adjustment optical system combining laser-induced acoustic underwater communication and a laser ranging system according to the present invention.
Fig. 2 is another schematic structural diagram of an adaptive adjustment optical system combining laser-induced acoustic underwater communication and a laser ranging system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the optical system combining laser induced acoustic underwater communication and laser ranging comprises a laser ranging emitter 1, a laser communication emitter 2, a common zoom system 3, a laser ranging receiver 5, a controller 6, a data processing system 7, a motor 8 and a two-in-one multiplexing optical fiber 9.
The distance measuring light emitted by the laser distance measuring emitter 1 and the communication light emitted by the laser communication emitter 2 are respectively optically coupled to two branches at one end of the two-in-one multiplexing optical fiber 9, are compounded into one branch through the two-in-one multiplexing optical fiber 9 to be output as a light source, and are emitted through the common zoom system 3 together to finally focus on a far field sea level or a specific laser breakdown depth position below the sea level; the laser communication transmitting power is high, the seawater can be punctured, and then the sound wave signals are excited to communicate.
The distance measuring light beam returns along the light path after being reflected by the sea surface, the laser distance measuring receiver 5 receives the light signal and converts the light signal into an electric signal, the electric signal is transmitted to the data processing system 7 to calculate the height of the sea surface in real time, the information is fed back to the controller 6, the controller 6 controls the motor 8 to drive and change the focal length of the shared zooming system 3, the positions of the laser distance measuring light beam and the laser-excited underwater communication light beam for focusing are adjusted, closed-loop control is formed, and the convergence point of the laser distance measuring light beam and the laser-excited underwater communication light beam is guaranteed to be always stabilized at the position of sea.
As shown in FIG. 2, the optical system combining laser-induced acoustic underwater communication and laser ranging comprises a laser ranging transmitter 1, a laser communication transmitter 2, a common zooming system 3, a reflector 4, a laser ranging receiver 5, a controller 6, a data processing system 7, a motor 8 and a two-in-one multiplexing optical fiber 9.
The distance measuring light emitted by the laser distance measuring transmitter 1 and the communication light emitted by the laser communication transmitter 2 are respectively optically coupled to two branches at one end of the two-in-one multiplexing optical fiber 9, are compounded into one branch through the two-in-one multiplexing optical fiber 9 to be output as a light source, are emitted through the common zoom system 3 together, are reflected through the reflector 4, and are finally focused on a far field sea level or a specific laser breakdown depth position below the sea level; the laser communication transmitting power is high, the seawater can be punctured, and then the sound wave signals are excited to communicate.
The distance measuring light beam returns along a light path after being reflected by the sea surface, is reflected by the reflector 4, is received by the laser distance measuring receiver 5 and is converted into an electric signal, the electric signal is transmitted to the data processing system 7 to calculate the height of the sea level in real time, and then the information is fed back to the controller 6, the controller 6 controls the motor 8 to drive and change the focal length of the shared zooming system 3, so that the focusing positions of the laser distance measuring light beam and the laser-excited underwater communication light beam are adjusted, closed-loop control is formed, and the convergence point of the laser distance measuring light beam and the laser-excited underwater communication light beam is ensured to be always stabilized at the position of.
The laser ranging transmitter 1 and the laser communication transmitter 2 respectively select different operating wave bands of 1064nm and 1550 nm. The shared zoom system 3 can perform achromatic treatment on chromatic aberration generated by compounding the laser ranging transmitter 1 and the laser communication transmitter 2, and the focusing performance of different wave bands is guaranteed.
The laser emission optical axis of the common zoom system 3 and the laser receiving optical axis of the laser ranging receiver 5 are parallel to each other and both pass through the reflecting mirror 4.
The reflector 4 is arranged on the adjusting seat, is adjustable in direction and is used for adjusting the directions of laser ranging and laser induced sound underwater communication.
The common zoom system 3 focuses the light from the two-in-one multiplexed fiber 9 at the sea level in the far field. The focal length of the common zoom system 3 is changed through the driving of the motor 8, and then the position of a laser convergence breakdown point is adjusted.
Claims (3)
1. The communication and ranging shared optical system sea wave height self-adaptive underwater communication system is characterized by comprising a laser ranging transmitter (1), a laser communication transmitter (2), a shared zooming system (3), a laser ranging receiver (5), a controller (6), a data processing system (7), a motor (8) and a two-in-one multiplexing optical fiber (9);
distance measuring light emitted by the laser distance measuring emitter (1) and communication light emitted by the laser communication emitter (2) are respectively optically coupled to two branches at one end of the two-in-one multiplexing optical fiber (9), are compounded into one path through the two-in-one multiplexing optical fiber (9) to be output as a light source, and are emitted through the common zoom system (3) together to finally focus on a far field sea level or a specific laser breakdown depth position below the sea level; the seawater can be punctured due to high laser communication transmitting power, and then the sound wave signal is excited to carry out communication;
the distance measuring light beam returns along a light path after being reflected by the sea surface, the laser distance measuring receiver (5) receives the light signal and converts the light signal into an electric signal, the electric signal is transmitted to the data processing system (7) to calculate the height of the sea level in real time, the sea level height information is fed back to the controller (6), the controller (6) controls the motor (8) to drive and change the focal length of the shared zooming system (3), and then the focusing positions of the laser distance measuring light beam and the laser-excited underwater communication light beam are adjusted to form closed-loop control, so that the convergence point of the laser distance measuring light beam and the laser-excited underwater communication light beam is ensured to be always stabilized at the position of sea water.
2. The communication and ranging shared optical system sea wave height self-adaptive underwater communication system is characterized by comprising a laser ranging transmitter (1), a laser communication transmitter (2), a shared zooming system (3), a reflector (4), a laser ranging receiver (5), a controller (6), a laser ranging data processing system (7), a motor (8) and a two-in-one multiplexing optical fiber (9);
distance measuring light emitted by the laser distance measuring emitter (1) and communication light emitted by the laser communication emitter (2) are respectively optically coupled to two branches at one end of the two-in-one multiplexing optical fiber (9), are compounded into one path through the two-in-one multiplexing optical fiber (9) to be output as a light source, are emitted through the common zoom system (3) together, are reflected through the reflector (4), and are finally focused on a far field sea level or a specific laser breakdown depth position below the sea level; the seawater can be punctured due to high laser communication transmitting power, and then the sound wave signal is excited to carry out communication;
the distance measuring light beam returns along a light path after being reflected by the sea surface, is reflected by the reflector (4), is received by the laser distance measuring receiver (5) and is converted into an electric signal, the electric signal is transmitted to the data processing system (7) to calculate the height of the sea level in real time, the sea level height information is fed back to the controller (6), the controller (6) controls the motor (8) to drive and change the focal length of the shared zooming system (3), and then the focusing positions of the laser distance measuring light beam and the laser excitation underwater communication light beam are adjusted to form closed-loop control, so that the convergence point of the laser distance measuring light beam and the laser excitation underwater communication light beam is ensured to be always stabilized at the seawater breakdown position.
3. A wave height adaptive underwater communication system of a communication and ranging shared optical system according to claim 2, characterized in that the laser emitting optical axis of the shared zoom system (3) and the laser receiving optical axis of the laser ranging receiver (5) are parallel to each other and both pass through the reflector (4).
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| CN108833022B true CN108833022B (en) | 2020-01-03 |
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| CN103338079A (en) * | 2013-06-08 | 2013-10-02 | 中国科学院上海光学精密机械研究所 | Underwater wireless acousto-optic communication device and method |
| CN104765128A (en) * | 2015-04-21 | 2015-07-08 | 长春理工大学 | Environment defocusing self-adaptation compensation method for airborne laser communication system |
| CN104852772A (en) * | 2015-04-29 | 2015-08-19 | 桂林电子科技大学 | Laser frequency hopping underwater acoustic-induced digital communication system and laser frequency hopping underwater acoustic-induced digital communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107040315B (en) * | 2017-04-10 | 2020-10-30 | 北京华夏光谷光电科技有限公司 | Laser underwater sound generator |
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| US5038406A (en) * | 1989-09-19 | 1991-08-06 | Gte Goverment Systems Corporation | Secure two-way submarine communication system |
| CN103338079A (en) * | 2013-06-08 | 2013-10-02 | 中国科学院上海光学精密机械研究所 | Underwater wireless acousto-optic communication device and method |
| CN104765128A (en) * | 2015-04-21 | 2015-07-08 | 长春理工大学 | Environment defocusing self-adaptation compensation method for airborne laser communication system |
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