CN106656466B - A kind of association encrypted transmission device and method of underwater optics image - Google Patents
A kind of association encrypted transmission device and method of underwater optics image Download PDFInfo
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- CN106656466B CN106656466B CN201611183949.5A CN201611183949A CN106656466B CN 106656466 B CN106656466 B CN 106656466B CN 201611183949 A CN201611183949 A CN 201611183949A CN 106656466 B CN106656466 B CN 106656466B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/001—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
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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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
- H04B10/6911—Photodiode bias control, e.g. for compensating temperature variations
-
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
Abstract
The present invention provides a kind of association encrypted transmission device and method of underwater optics image.Described device includes that optical imagery rebuilds platform and underwater optics test platform；It includes underwater sound signal receiving module and be associated with computing module that the optical imagery, which rebuilds platform,；The underwater optics test platform includes middle control module, Structured Illumination module, optical echo detecting module and acoustic transducer transmitting module.The method includes S1, target object under emission detection illumination jetting is associated imaging；Optical echo signal is received, acoustic channels is sent to after modulation and is transmitted；S2 receives acoustic channels signal, is demodulated and is associated with calculation processing and obtain the imaging of submarine target object.The invention is not only able to maintain the advantages that high-resolution of optical imagery, can also increase the underwater transmission range of optical imagery, improves traffic rate, realizes the remote transmission of optical imagery.
Description
Technical field
The present invention relates to underwater image transmission process field, the association more particularly, to a kind of underwater optics image adds
Close transmitting device and method.
Background technique
Currently, imaging technique is the widest application field of optics, human brain, which has 80% information, to be obtained by eyes
, it is seen that image information is most important to the daily life of the mankind.Optical imagery can carry out high-resolution, high sensitivity to object
And fast imaging, thus have and be widely applied, mainly target object is directly detected using photodetector.
It usually needs to encrypt image in secret communication, traditional Image Chaos encryption method is due to chaos sequence pair
Primary condition quite sensitive, primary condition have nuance that can all lead to entirely different chaos sequence, to can not restore former
Beginning image, error rate are very high.Image is associated with encryption method and primary condition tender subject is not present, and transmitting terminal and receiving end use
Be the measured shared key of preparatory quotient, therefore decrypt it is very convenient.
Many limits are but received when there is lot of advantages using optical signalling imaging, but this technology being applied to underwater
System.When optical detection is applied to underwater environment, high-resolution, high sensitivity and fast imaging can be still realized, but optical signal exists
Under water due to absorbing and scattering, transmission range is very short, and which greatly limits the applications of optical detection environment under water.
Underwater sound communication is current subaqueous most communication means, in the prior art, spread-spectrum underwater sound communication, the chaos underwater sound
The technologies such as communication are highly developed, and transmission range is up to dozens of kilometres, and not by electromagnetic interference.Acoustics is utilized in underwater environment
Signal is transmitted, and has many advantages, such as high reliability, highly concealed type, high-timeliness and high confidentiality.Underwater sound communication can be realized
Between underwater each platform and the communication between underwater platform and pier, the fields such as scouting, dispatch control have under water
Major application.
Underwater optics imaging technique is combined with water sound communication technique, and optical detection imaging moiety is still believed using optics
Number, it in optical detection to signal loading to sound wave, is emitted in underwater sound signal and is transmitted at a distance, this method can not only protect
The advantages that holding the high-resolution of optical imagery realizes optical picture the problems such as can also solving optical signalling transmission range is short under water
The remote transmission of picture.
Summary of the invention
The present invention provides a kind of underwater optics image for overcoming the above problem or at least being partially solved the above problem
It is associated with encrypted transmission device and method.
According to an aspect of the present invention, a kind of association encrypted transmission device of underwater optics image, including optics are provided
Image reconstruction platform and underwater optics test platform；
It includes underwater sound signal receiving module and be associated with computing module that the optical imagery, which rebuilds platform,；
The underwater optics test platform includes middle control module, Structured Illumination module, optical echo detecting module harmony
Learn transducing transmitting module.
The middle control module for generating the probe instructions for carrying out optical detection to submarine target object, and receives echo letter
Number it is sent to acoustic transducer transmitting module；
The Structured Illumination module, for controlling the probe instructions of module in receiving, emission detection light carries out detection light
Optical shaping and intensity modulation, the modulation optical illumination that submarine target object is changed over time；
The optical echo detecting module, for detecting and receiving the optical echo signal of submarine target object reflection, and will
Echo-signal is sent to middle control module；
The acoustic transducer transmitting module, for being modulated to obtain modulated signal to echo-signal, and by modulated signal
It is loaded on the intended carriers frequency band of acoustic signal and is transmitted；
The underwater sound signal receiving module carries out demodulation process, extracts echo for receiving the modulated signal of underwater acoustic channel
Signal；
The imaging of submarine target object is calculated for being associated to echo-signal in the association computing module.
According to another aspect of the present invention, a kind of association encrypted transmission method of underwater optics image is provided, comprising:
S1, target object under emission detection illumination jetting, is associated imaging；Optical echo signal is received, after modulation
Acoustic channels are sent to be transmitted；
S2 receives acoustic channels signal, is demodulated and is associated with calculation processing and obtain the imaging of submarine target object.
The application proposes a kind of association encrypted transmission device and method of underwater optics image, underwater optics imaging technique with
Water sound communication technique combines, and optical detection imaging moiety still uses optical signalling, and optical detection is arrived to signal loading
It on sound wave, is emitted in underwater sound signal and is transmitted at a distance, it is excellent that this method is not only able to maintain high-resolution of optical imagery etc.
Point can also increase the underwater transmission range of optical imagery, improve traffic rate, realize the remote transmission of optical imagery, realize
Optical imagery reconstruction platform is accurately and rapidly transferred to target object fast imaging and image to handle.
Detailed description of the invention
Fig. 1 is the association encrypted transmission schematic device of underwater optics image of the present invention；
Fig. 2 is according to device first embodiment schematic diagram of the present invention；
Fig. 3 is that first embodiment of the invention difference matrix generates schematic diagram；
Fig. 4 is that first embodiment of the invention optical encryption handles original matrix schematic diagram；
Fig. 5 is first embodiment of the invention optical encryption processing randomization matrix schematic diagram；
Fig. 6 is first embodiment of the invention optical encryption, visual decryption processing schematic；
Fig. 7 is according to device second embodiment schematic diagram of the present invention；
Fig. 8 is the association encrypted transmission method flow chart of underwater optics image of the present invention.
Description of symbols
1, optical imagery reconstruction platform, 2, underwater optics test platform, 11, underwater sound signal receiving module, 12, association calculating
Module, 21, middle control module, 22, Structured Illumination module, 23, optical echo detecting module, 24, acoustic transducer transmitting module,
25, image-forming module, 26, line scans and transmitting module, 27, echo collection module, 221, two-dimension light source transmitter, 222, shaping light
Element, 223, spatial light modulator, 224, one-dimensional light source emitter, 241, spread spectrum modulator, 242, underwater sound signal transmitter,
243, chaotic modulation device, 111, underwater sound signal receiver, 112, extended frequency demodulator, 113, chaos demodulator.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, being the association encrypted transmission schematic device of underwater optics image of the present invention, including including optical picture
As rebuilding platform 1 and underwater optics test platform 2；
It includes underwater sound signal receiving module 11 and be associated with computing module 12 that the optical imagery, which rebuilds platform 1,；
The underwater optics test platform 2 includes middle control module 21, Structured Illumination module 22, optical echo detecting module
23 and acoustic transducer transmitting module 24；
Underwater sound signal receiving module 11, association computing module 12, middle control module 21, Structured Illumination module 22, optics return
Wave detecting module 23 and acoustic transducer transmitting module 24；
The middle control module 21 for generating the probe instructions for carrying out optical detection to submarine target object, and receives echo
Signal is sent to acoustic transducer transmitting module 24；
The Structured Illumination module 22, for controlling the probe instructions of module 21, emission detection light, to detection light in receiving
Carry out optical shaping and intensity modulation, the modulation optical illumination changed over time to submarine target object；
The optical echo detecting module 23, for detecting and receiving the optical echo signal of submarine target object reflection, and
Middle control module 21 is sent by echo-signal；
The acoustic transducer transmitting module 24 obtains modulated signal for being modulated to echo-signal, and modulation is believed
It number is loaded on the intended carriers frequency band of acoustic signal and to be transmitted；
The underwater sound signal receiving module 11 carries out demodulation process, extracts back for receiving the modulated signal of underwater acoustic channel
Wave signal；
The imaging of submarine target object is calculated for being associated to echo-signal in the association computing module 12.
The connection of the underwater sound signal receiving module 11 association computing module 12；The middle control module 21 is separately connected structure light
Lighting module 22, optical echo detecting module 23, acoustic transducer transmitting module 24；
The middle control module 21 sends triggering command to Structured Illumination module 22, and the Structured Illumination module 22 receives
Target object under detection illumination jetting is issued after instruction；The optical echo detecting module 23 receives the reflection of submarine target object
Optical echo signal, and middle control module 21 is sent by the echo-signal；The middle control module 21 sends the echo-signal
To acoustic transducer transmitting module 24, the acoustic transducer transmitting module 24 is modulated echo-signal to obtain modulated signal, and
Acoustic channels are sent to be transmitted；
The modulated signal that the underwater sound signal receiving module 11 receives acoustic channels is demodulated, and is sent to association and is calculated
Optical image security is carried out in module 12.
Device of the present invention includes two embodiments, and the association encrypted transmission of underwater optics image can be achieved, below
It describes respectively.
As shown in Fig. 2, for according to device first embodiment schematic diagram of the present invention, the Structured Illumination module 22 is wrapped
Include two-dimension light source transmitter 221, shaping element 222 and spatial light modulator 223；
The two-dimension light source transmitter 221, for emitting two-dimensional detection light；
The shaping element 222, for carrying out optical shaping to detection light；
The spatial light modulator 223 divides light intensity at random for carrying out spatial light intensity modulation to the detection light after shaping
Cloth.
The acoustic transducer transmitting module 24 includes spread spectrum modulator 241 and underwater sound signal transmitter 242；
The spread spectrum modulator 241, for obtaining modulation letter to echo-signal progress band spectrum modulation and acoustics encryption
Number, and modulated signal is loaded on the intended carriers frequency band of acoustic signal；The intended carriers frequency band is 4kHz-6kHz.
The underwater sound signal transmitter 242, is transmitted for the modulated signal to be emitted in acoustic channels.
The underwater sound signal receiving module 11 includes underwater sound signal receiver 111 and extended frequency demodulator 112；
The underwater sound signal receiver 111, for receiving the modulated signal of underwater acoustic channel；
The extended frequency demodulator 112 carries out spread spectrum demodulation and acoustics decryption processing for the modulated signal, extracts echo
Signal, and it is sent to association computing module 12.
The spatial light modulator 223 be associated on computing module 12 pre-saved respectively binary system illumination Random Graph make
For the key of optical encryption processing；It is described to have pre-saved binary system illumination Random Graph, for optical imagery reconstruction platform 1 and under water
The public keys of optical detection platform 2.
The spatial light modulator 223 is associated and object is calculated by detection light and binary system illumination Random Graph
Light distribution at body carries out optical encryption processing, and processing result is sent to middle control module 21；
The association computing module 12 illuminates the echo that Random Graph extracts underwater sound signal receiving module 11 by binary system
Signal carries out visual decryption and handles to obtain the imaging of submarine target object.
It further include image-forming module 25, the 25 connection structure optical illumination module 22 of image-forming module, for light projection will to be detected
Onto submarine target object.
In the first embodiment, the two-dimension light source transmitter 221 is area source.It preferably, is LED area light source, LED
Surface source luminescence efficiency is big, at low cost, and LED salt free ligands hot spot.
The spatial light modulator 223 be LCD space light modulator (LCSLM) or Digital Micromirror Device (DMD), preferably
, it is the Digital Micromirror Device DMD (Digital Mirror Device) of TI (Texas Instruments) company exploitation, with
Liquid crystal structure in SLM (Spatial Light Modulator) is different, is mirror structure in DMD, by being specifically imaged
Image on DMD can be projected directly at the spatial position where object by module, and the image on DMD is can be pre-loaded
, refresh rate is fast, and operating wavelength range is big, is highly suitable for high speed light modulation field.
The optical echo detecting module 23 is one or more point detectors, the point detector be photodiode,
Photomultiplier tube PMT or avalanche photodide APD is a kind of optoelectronic sensor for optical signal being converted to electric signal；No
It is required that doing the distinguishable detection of two dimension, do not need have spatial resolving power.It preferably, is avalanche photodide APD
(Avalanche Photo Diode), internal gain is high, sensitivity when can be improved to signal detection, and responds speed
Degree is fast, and band bandwidth is up to 100GHz.When detecting light intensity signal simultaneously using multiple point detectors and averaging, can effectively subtract
Less due to receiving angle or extraneous unstable environmental factor bring error, the accuracy of system is improved.
The purpose of spread spectrum modulator 241 is for optical echo detecting module 23 in the acoustic transducer transmitting module 24
The optical echo signal that receives of point detector encrypted, enhance the anti-interference ability of underwater transmission process, modulator approach is
Spread spectrum modulation technique；Signal can be encrypted by scheduled coding while modulation, with further lifting system safety, this
For acoustics encryption.
In the first embodiment, the collaborative work relationship of each intermodule is as follows:
The middle control module 21, which issues triggering command, makes Structured Illumination module 22 start to work, Structured Illumination module 22
In two-dimension light source transmitter 221 emit light after 222 shaping of shaping element by the spatial light modulator
223 carry out spatial light intensity modulation, make light intensity random distribution；And the light emitted by two-dimension light source transmitter 221 and space light modulation
The light distribution at target object is calculated in the binary system illumination Random Graph pre-saved on device 223.
The light of the light intensity random distribution projects on submarine target object through specific image-forming module 25, reflects through object
Afterwards, by 23 receives echo-signal of optical echo detecting module, and the echo-signal received is sent to middle control module 21.
Middle control 21 echo-signals received of module are transmitted to the spread spectrum modulator 241 in acoustic transducer transmitting module 24
It is modulated, echo-signal is loaded on acoustic signal, carrier frequency band selects 4kHz-6kHz；Underwater sound signal transmitter 242 will
The acoustic signal is emitted into acoustic channels to be transmitted at a distance.
Underwater sound signal receiver 111 in underwater sound signal receiving module 11 receives the acoustic signal from underwater acoustic channel,
It is demodulated through extended frequency demodulator 112, extracts required echo-signal, be sent into association computing module 12, utilize what is extracted
Detection light distribution at intensity signal and the submarine target object being calculated before is associated calculating, obtains submarine target
The imaging of object.
In the first embodiment, the light of LED two-dimension light source transmitting in Structured Illumination modular structure optical illumination module 22
Wavelength is green light band, belongs to " blue-green window " of visible light propagation in seawater, Absorption by Sea Water is lower.The spatial light modulator
Pre-loaded binary system illumination Random Graph is random Hadamard matrix in 223, and Hadamard matrix is by {+1, -1 } element
The orthogonal matrix of composition, all row and columns are completely orthogonal each other；Hadamard matrix element only has 1 and -1, in order in projection
Represent -1, it is necessary to by the way of difference projection.
In the first embodiment, it is 32 × 32 imagings with resolution ratio, needs Hadamard to sample 1024 times, difference is needed to throw
Shadow 2048 times.As shown in Fig. 2, being the generation step of difference projection matrix, comprising:
Every a line is extracted to the Hadamard matrix of 1024*1024 and obtains the matrix of 1024 32*32, i.e., to every a line
1024 elements, are rearranged into the matrix of a 32*32, and 1024 rows can be rearranged into the matrix of 1024 32*32；
To the matrix of each 32*32, element -1 therein is set to 0, obtains A matrix, the element of A matrix only has 1 and 0；
To each A matrix, 1-A is executed, i.e., to each elements A in Ai, execute 1-Ai, B matrix is obtained, B matrix only has 0
With 1.
In the first embodiment, in order to realize secret communication, need to be associated optical imagery encryption, it will be original
Hadamard matrix carries out randomization and generates randomization Hadamard matrix, and randomization Hadamard matrix, which both can guarantee, to be associated to
The high efficiency of picture, but also with the random distribution nature of secret communication.The first embodiment under water target object project when, lead to
Spatial light modulator 223 is crossed by being associated encryption to optical imagery, this is optical encryption processing.
The principle of the optical encryption processing is as follows:
The original Hadamard matrix that Fig. 4 is one 32 × 32, the original Hadamard matrix pass through to two-dimension light source
The light of transmitting carries out difference projection and obtains；Fig. 5 is the randomization Hadamard matrix generated by Fig. 4, the present invention { xi}
To identify the randomization Hadamard matrix, { xiIt is the binary system illumination Random Graph pre-saved, i.e. { xiIt is spatial light
Modulator 223 and the public keys for being associated with computing module 12.
As shown in fig. 6, the light of LED two-dimension light source is melted into { x at randomiAfter be radiated on submarine target object after, underwater mesh
Mark object reflects light, generates reflected light, the present invention { yiIdentify reflected light；Optical echo detecting module 23 receives
To { yi, after acoustic transmission, reaches association computing module 12 and pre-saved { xi, utilize { xiAnd { yiCan calculate
Target object out.
The binary system illumination Random Graph { x of the present invention pre-savedi, i is multiple, multiple { xiBoth can it is identical or
It can be different.When the start-up operation of Structured Illumination module 22,221 emission detection light of two-dimension light source transmitter, spatial light modulator
223 are handled detection light, generate { xiAnd save；{ x when Structured Illumination 22 every task of moduleiCan be identical,
It can also be different.
{ the xiThe association computing module 12 for learning image reconstruction platform 1 is set to know and save in advance by predetermined approach,
The predetermined approach is associated with computing module 12 including being transferred in advance by acoustic channels, or directly by { xiIt is stored in association
On computing module 12.
As shown in fig. 7, the second embodiment is the present invention for according to device second embodiment schematic diagram of the present invention
A preferred embodiment, the Structured Illumination module 22 include one-dimensional light source emitter 221, shaping element 222；
The one-dimensional light source emitter 224, for emitting one-dimensional detection light；
The shaping element 222, for carrying out optical shaping to detection light.
The acoustic transducer transmitting module 24 includes underwater sound signal transmitter 242 and chaotic modulation device 243；
The chaotic modulation device 243 obtains modulated signal for carrying out chaotic modulation to echo-signal, and by modulated signal
It is loaded on the intended carriers frequency band of acoustic signal；
The underwater sound signal transmitter 242, is transmitted for the modulated signal to be emitted in acoustic channels.
The underwater sound signal receiving module 11 includes underwater sound signal receiver 111 and chaos demodulator 113；
The underwater sound signal receiver 111, for receiving the modulated signal of underwater acoustic channel；
The chaos demodulator 113 carries out chaos demodulation for the modulated signal, extracts echo-signal, and be sent to
It is associated with computing module 12.
It further include line scanning and transmitting module 26 and echo collection module 27；
The line scanning and 26 connection structure optical illumination module 22 of transmitting module, it is narrow for being scanned progress to detection light
Long exploring laser light, and reflected to submarine target object；
The echo collection module 26 connects optical echo detecting module 23, for collecting the light of submarine target object reflection
Echo-signal, and it is sent to optical echo detecting module 23；
The optical echo detecting module 23 is strong by the echo-signal of specific time and the exploring laser light of submarine target object
Degree is associated processing, and processing result is sent to middle control module 21.
Unlike first embodiment of the invention, second embodiment light source is one-dimensional light source, and preferred linear array swashs
The intensity modulated of optical diode, the one-dimensional laser source can directly be modulated by power supply, it is no longer necessary to as in embodiment one
DMD is needed to carry out light intensity spatial modulation；In the present embodiment signal modulating method be chaotic modulation, chaos system to primary condition very
Sensitivity, the unpredictability with long-term motion, and complexity is big, is difficult to decode, for extremely safe in secret signalling.
The line scanning includes line scanning element and radiated element with transmitting module 26, and middle line scanning element is automatically controlled sweeps
Element is retouched, can control the exit direction of light, realizes the comprehensive scanning imagery of submarine target object；Radiated element include lens group with
The combination of any one or two kinds of microscope group is reflected, wherein lens group is any one of cylindrical mirror, spherical mirror and aspherical mirror
Or a variety of combinations, the reflection microscope group are the combination of any one or more of cylindrical mirror, spherical mirror and aspherical mirror.
In the second embodiment, the one-dimensional light source emitter 224 is made of linear laser diode LED, light
Wavelength selects blue wave band, and the luminous intensity of each LED is directly controlled by power supply, can directly generate the one of intensity random distribution
Exploring laser light is tieed up, does not need to be modulated with other spatial light intensity modulator again.
With the exploring laser light pair of long and narrow bar shaped after the one-dimensional detection light warp scanning of light intensity random distribution and transmitting module 26
Submarine target object carries out all-directional illumination, and the light reflected by submarine target object is collected by echo collection module 7, and by described
Optical echo detecting module 23 receives.
At the reflection laser echo and submarine target object of the specific time that the optical echo detecting module 23 detects
One-dimensional exploring laser light Distribution of laser intensity be associated processing, it can be achieved that range gating.Optical echo detecting module 23 connects
Echo-signal is received, and sends the echo-signal received to middle control module 21；Middle control 21 echo-signals received of module
The chaotic modulation device 243 being transmitted in acoustic transducer transmitting module 24 is handled, and echo-signal is loaded on acoustic signal,
Carrier frequency selects 10kHz；It is emitted into acoustic channels by underwater sound signal transmitter 242 and is transmitted at a distance again.
Underwater sound signal receiver 111 in underwater sound signal receiving module 11 receives the underwater sound signal from underwater acoustic channel,
It is demodulated through chaos demodulator 113, extracts required echo-signal, be sent into association computing module 12 and be associated calculating,
Obtain the imaging of submarine target object.
Underwater optics test platform 2 of the present invention is movable, realizes the quick spy to target object region by movement
Survey imaging；In the case where having corresponding hardware device, the underwater optics test platform 2 rebuilds platform 1 with optical imagery
Role is interchangeable, and optical imagery rebuilds platform 1 and also target object can be imaged.
The present invention is when target object is associated imaging under using detection illumination jetting, if object information amount is huge, passes
The method of sampling of system will lead to sample rate and conversion speed is too slow, using the method for compressed sensing, will compress and adopts
Sample is combined into one, and can effectively reduce sampling number, improves the speed of system imaging, is saved data space, is improved image
Resolution ratio realizes signal Accurate Reconstruction.
As shown in figure 8, being the association encrypted transmission method flow chart of underwater optics image of the present invention, a kind of underwater optics figure
The association encrypted transmission method of picture characterized by comprising
S1, target object under emission detection illumination jetting, is associated imaging；Optical echo signal is received, after modulation
Acoustic channels are sent to be transmitted；
S2 receives acoustic channels signal, is demodulated and is associated with calculation processing and obtain the imaging of submarine target object.
In the present invention, the processing of the method S1 is completed by underwater optics test platform 2, and the processing of S2 is by optical imagery weight
Jianping platform 1 is completed.
Specifically, method used by device first embodiment of the present invention are as follows:
Step 100, emit two-dimensional detection light, optical shaping is carried out to detection light；
It is completed respectively by two-dimension light source transmitter 221 in described device and shaping element 222, the detection optical wavelength
For green light band.
Step 101, spatial light intensity modulation is carried out, light intensity random distribution is made；Submarine target object is irradiated, is shone by binary system
The detection light distribution at target object is calculated in bright Random Graph, carries out optical encryption processing；
It is completed by described device spatial light modulator 223.
Specific processing is to carry out difference projection to detection light, and randomization generates binary system and illuminates Random Graph, irradiates underwater mesh
Object is marked, the detection light distribution at target object is calculated and is encrypted.
Step 102, reflected light echo-signal is received, band spectrum modulation is carried out to echo-signal and acoustics encryption is adjusted
Modulated signal is loaded on the intended carriers frequency band of acoustic signal, and is emitted in acoustic channels and is transmitted by signal processed；
It is complete by optical echo detecting module 23, spread spectrum modulator 241 and underwater sound signal transmitter 242 in described device respectively
At.
The acoustics encryption refers to, can encrypt to signal by scheduled coding while modulation.
It is the Image Acquisition transmitting terminal i.e. processing of underwater optics test platform 2 above.
Step 103, the modulated signal of underwater acoustic channel is received, spread spectrum demodulation and acoustics decryption processing are carried out, extracts echo letter
Number；It is completed by underwater sound signal receiver 111 in described device and extended frequency demodulator 1112.
The acoustics decryption processing refers to the treatment process opposite with acoustics encryption.
Step 104, it crosses binary system illumination Random Graph and visual decryption processing is carried out to echo-signal, obtain submarine target object
Imaging；It is completed by being associated with computing module 12 in described device.
The visual decryption processing, which refers to, handles opposite treatment process with optical encryption.
Above signal receives the processing that image reconstruction end, that is, optical imagery rebuilds platform 1.
Specifically, method used by device second embodiment of the present invention are as follows:
Step 200, emit one-dimensional detection light, optical shaping is carried out to detection light；Emitted by light source one-dimensional in described device
Device 224 and shaping element 222 are completed.
The detection optical wavelength selects blue wave band, and is light intensity random distribution.
Step 201, the exploring laser light that processing forms long and narrow bar shaped is scanned to detection light, irradiates submarine target object；
It is completed by described device centerline scan and transmitting module 26.
Step 202, reflected light echo-signal is received, the echo-signal of specific time and the detection of submarine target object are swashed
Luminous intensity is associated processing；It is completed by optical echo detecting module 23 in described device.
Step 203, it carries out chaotic modulation and obtains modulated signal, modulated signal is loaded into the intended carriers frequency of acoustic signal
It takes, and is emitted in acoustic channels and is transmitted；
It is completed respectively by chaotic modulation device 243 in described device and underwater sound signal transmitter 242.
Chaotic modulation has the unpredictability of long-term motion, and complexity is big, is difficult to decode, and uses the letter of chaotic modulation
Number have encryption.
It is the processing of Image Acquisition transmitting terminal above.
Step 204, the modulated signal of underwater acoustic channel is received, chaos demodulation is carried out, extracts echo-signal；By in described device
Chaos demodulator 113 is completed.
Step 205, echo-signal and laser intensity are associated calculating, obtain the imaging of submarine target object.By described
Device is associated with computing module 12 and completes.
The association calculating, which refers to, carries out echo-signal and the exploring laser light intensity of submarine target object with step 201
The opposite treatment process of association process.
Above signal receives the processing at image reconstruction end.
Association encrypted remote transmitting device, the system and method for underwater optics image provided by the invention, are closed using optics
Connection detection transmits the mode combined with underwater sound communication, effectively increases the imaging resolution of underwater optics image and the transmission distance of image
From.
Two-dimensional detection light source can be used in light source, and one-dimensional probe source also can be used, and irradiates object using one-dimensional probe source
When, the target image that high quality is obtained with less sampling number, shorter reconstruction time may be implemented；Light source can be used continuous
Pulsed light can also be used in light, when emitting laser using pulse laser, by line scanning and transmitting module and echo acquirement module,
In conjunction with range gating, higher signal-to-noise ratio can achieve.
It is encrypted using association encryption and underwater sound communication, realizes that a system has two shared keys, both increase system
Safety and anti-interference, and solve asymmetric encryption and calculate the problems such as time is long, cipher key calculation is difficult.In short, underwater
Optical detection not only remains optical detection high resolution, the advantages that image taking speed is fast in conjunction with underwater sound communication, but also solves because of sea
Underwater optics image transmitting is apart from short disadvantage caused by water absorbs.
Finally, the present processes are only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (9)
1. a kind of association encrypted transmission device of underwater optics image characterized by comprising optical imagery rebuilds platform (1)
With underwater optics test platform (2)；
It includes underwater sound signal receiving module (11) and be associated with computing module (12) that the optical imagery, which rebuilds platform (1),；
The underwater optics test platform (2) includes middle control module (21), Structured Illumination module (22), optical echo detection mould
Block (23) and acoustic transducer transmitting module (24)；
Underwater sound signal receiving module (11), association computing module (12), middle control module (21), Structured Illumination module (22), light
Learn sounding module (23) and acoustic transducer transmitting module (24)；Underwater sound signal receiving module (11) the connection association calculates
Module (12)；The middle control module (21) is separately connected Structured Illumination module (22), optical echo detecting module (23), acoustics
Transducing transmitting module (24)；
The middle control module (21) for generating the probe instructions for carrying out optical detection to submarine target object, and receives echo letter
Number it is sent to acoustic transducer transmitting module (24)；
The Structured Illumination module (22), for controlling the probe instructions of module (21), emission detection light, to detection light in receiving
Carry out optical shaping and intensity modulation, the modulation optical illumination changed over time to submarine target object；
The optical echo detecting module (23), for detecting and receiving the optical echo signal of submarine target object reflection, and will
Echo-signal is sent to middle control module (21)；
The acoustic transducer transmitting module (24), for being modulated to obtain modulated signal to echo-signal, and by modulated signal
It is loaded on the intended carriers frequency band of acoustic signal and is transmitted；
The underwater sound signal receiving module (11) carries out demodulation process, extracts echo for receiving the modulated signal of underwater acoustic channel
Signal；
The imaging of submarine target object is calculated for being associated to echo-signal in the association computing module (12).
2. device as described in claim 1, which is characterized in that further include image-forming module (25), the image-forming module (25) is used
It is projected in a manner of difference projection on submarine target object in light will be detected.
3. device as described in claim 1, which is characterized in that further include line scanning and transmitting module (26) and echo collection mould
Block (27)；
The line scanning and transmitting module (26), for being scanned to form long and narrow exploring laser light to detection light, to underwater mesh
Mark object reflection；
The echo collection module (27) for collecting the optical echo signal of submarine target object reflection, and is sent to optics and returns
Wave detecting module (23).
4. device as claimed in claim 2, which is characterized in that the Structured Illumination module (22) includes spatial light modulator
(223), the spatial light modulator (223) is LCD space light modulator (LCSLM) or Digital Micromirror Device (DMD).
5. a kind of association encrypted transmission method for realizing underwater optics image using device as described in claim 1, special
Sign is, comprising:
S1, target object under emission detection illumination jetting, is associated imaging；Optical echo signal is received, is sent after modulation
It is transmitted to acoustic channels；
S2 receives acoustic channels signal, is demodulated and is associated with calculation processing and obtain the imaging of submarine target object.
6. method as claimed in claim 5, which is characterized in that S1 includes:
Emit two-dimensional detection light, optical shaping is carried out to detection light；
Spatial light intensity modulation is carried out, light intensity random distribution is made；Submarine target object is irradiated, Random Graph is illuminated by binary system and is carried out
The detection light distribution at target object is calculated in association, carries out optical encryption processing；
Reflected light echo-signal is received, band spectrum modulation is carried out to echo-signal and acoustics encryption obtains modulated signal, will be adjusted
In signal loading processed to the intended carriers frequency band of acoustic signal, and it is sent in acoustic channels and is transmitted.
7. method as claimed in claim 6, which is characterized in that S2 includes:
The modulated signal of underwater acoustic channel is received, spread spectrum demodulation and acoustics decryption processing are carried out, extracts echo-signal；
Random Graph is illuminated by binary system, visual decryption processing is carried out to echo-signal, obtain the imaging of submarine target object.
8. method as claimed in claim 5, which is characterized in that S1 includes:
Emit one-dimensional detection light, optical shaping is carried out to detection light；
The exploring laser light that processing forms long and narrow bar shaped is scanned to detection light, irradiates submarine target object；
Reflected light echo-signal is received, the echo-signal of specific time and the exploring laser light intensity of submarine target object are closed
Connection processing；It carries out chaotic modulation and obtains modulated signal, modulated signal is loaded on the intended carriers frequency band of acoustic signal, concurrently
It is mapped in acoustic channels and is transmitted.
9. method according to claim 8, which is characterized in that S2 includes:
The modulated signal of underwater acoustic channel is received, chaos demodulation is carried out, extracts echo-signal；
Echo-signal and laser intensity are associated calculating, obtain the imaging of submarine target object.
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| CN107861252A (en) * | 2017-11-29 | 2018-03-30 | 苏州蛟视智能科技有限公司 | A kind of imaging device and method |
| CN108181624B (en) * | 2017-12-12 | 2020-03-17 | 西安交通大学 | Difference calculation imaging device and method |
| CN107888372B (en) * | 2017-12-19 | 2024-03-15 | 北京富迪广通科技发展有限公司 | Underwater sonar communication system based on chaotic oscillator array element |
| CN108596989B (en) * | 2018-04-28 | 2019-03-08 | 四川大学 | A kind of optical image encryption method based on detour cylinder diffraction and compressed sensing |
| CN109862324A (en) * | 2019-02-27 | 2019-06-07 | 福建师范大学福清分校 | A kind of communication means and system based on BICM |
| CN112396670B (en) * | 2019-08-15 | 2023-01-10 | 天津大学青岛海洋技术研究院 | Image reconstruction method for novel binary image sensor |
| CN112821962B (en) * | 2021-04-19 | 2021-06-25 | 江西锦源自动化技术有限公司 | Underwater wireless communication system |
| CN113595676B (en) * | 2021-07-23 | 2023-05-12 | 珠海格力电器股份有限公司 | Sensor anti-interference method, module, sensor and storage medium |
| CN115118337B (en) * | 2022-05-09 | 2023-11-17 | 中国科学技术大学 | Cross-dynamic water-atmosphere interface communication system based on surface light source |
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