CN109298410A - A kind of marine oil spill detecting laser radar - Google Patents
A kind of marine oil spill detecting laser radar Download PDFInfo
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- CN109298410A CN109298410A CN201811303361.8A CN201811303361A CN109298410A CN 109298410 A CN109298410 A CN 109298410A CN 201811303361 A CN201811303361 A CN 201811303361A CN 109298410 A CN109298410 A CN 109298410A
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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
- G01S7/483—Details of pulse systems
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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
- G01S7/483—Details of pulse systems
- G01S7/484—Transmitters
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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
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
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- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Optical Radar Systems And Details Thereof (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Marine oil spill detecting laser radar system penetrates characteristic using laser wavelength is good in the seawater, for the detection for the oil that stays under water under water, and the detected with high accuracy to targets such as green tide, sea ice, seabeds.The present invention carries out optics active probe to target underwater and waterborne using 532nm, 1064nm dual wavelength Gao Zhongying Laser emission；Using optical scanning system, the two-dimensional scanning of laser radar target is realized, obtain target three-dimensional position；Using laser transmitting-receiving coaxial design form, the realization difficulty of optical scanning system is reduced；Using heavy caliber, big visual field, multichannel optical receiving system, enhance under water compared with the detectivity of weak signal target；Using the signal processing system of high sample frequency, the target range detection of sub-meter grade precision is realized；Using Polarization Detection channel, the measurement of the depolarized coefficient of target surface is realized, be conducive to target resolution；Laser radar has Airborne Installation Unit, boat-carrying mounting device, can satisfy the requirement of different carrying platforms.
Description
Technical field
The present invention relates to a kind of marine oil spill detecting laser radars, belong to targets in ocean field of measuring technique.
Background technique
The detection of underwater oil spill object is ocean research one of the important goal information to be obtained, the development of the national economy,
It is played an important role in maritime rights and interests maintenance, national defense construction and scientific research.People grind the rule of underwater oil spilling at present
Study carefully and controlled level is lower, major reason is a lack of quickly and effectively underwater oil spilling detection means, shallow sea within especially 30m
The underwater oil spilling distributed intelligence in area.
The sixties in last century, the states such as the U.S., Canada and Australia successively develop and test first generation laser water
Deep measuring system.Other than the AOL system in the U.S., first generation airborne laser radar hydrospace detection system is all without scanning and height
Fast data recording function is a kind of simple bathymetric surveying instrument.Late 1980s start to propose airborne underwater laser at
As technology, occurs practical airborne Dispersion for Underwater Laser Imaging System to the beginning of the nineties, laser radar hydrospace detection system is gradually
Into the practical stage.
Wherein, Canadian Optech company is that Society Of American Military Engineers have developed a kind of practical hydrology exploration system
It unites SHOALS (Scanned Hydrographic Operational Airborne Lidar Survey), is using helicopter
Carrier, flying height 200m~1000m, has the function of GPS positioning and Ding Gao, using the Nd:YAG laser of 200Hz, green light and
The conllinear scanning mode of infrared light, increases third optical channel, carries out sea detection using the Raman back scattering of 647nm feux rouges
And the differentiation on sea, land, Raman echo all are from the back scattering of water body, the not no reflex components on sea, and by
The influence of wind speed and zenith angle is small, and independent infrared and Raman sea channel ensure that reliable and accurate sea within 20 ° of zenith angles
Face positioning.
Upgraded version of the CZMIL airborne laser sounding system as SHOALS 3000T system, the system are US militaries
It is customized to Canadian Optech company within 2011, delivery US military uses within 2012.CZMIL system is a set of collection Laser Measuring
The depth of water of new generation and coastal feature measuring system that quantity sensor and image sensor are integrated, the big, space with optical aperture
High resolution, the distinguishing feature for being suitble to poor water quality, max survey depth are more than 50m.
In the research and development and application aspect of airborne laser sounding system, the Saab company of Sweden (including later AHAB company)
Successively develop Flash system and HAWK EYE system；Australian the 1970s starts airborne laser sounding system
It develops, has carried out multiple sea trial, the nineties, Vision system house invests 24,000,000 Australian Dollars and develops new airborne laser survey
Deep system LADS Mk II, which can measure phytal zone with 20 times of efficiency of conventional acoustic method, but total funds
The 20% of conventional method is only needed, and the extra fine grade that its water-depth measurement precision can reach in " international hydrographic survey standard " is wanted
It asks；Experiment Innovatation type Onboard searching laser radar (EAARL) system is a kind of Lab Products that U.S. NASA is developed, and is a kind of
With measurement coral reef, the offshore depth of water, the airborne laser radar system of littoral vegetation and sandy beach ability, the system is according to electricity
The bluish-green part of magnetic wave frequency spectrum just seamless can measure underwater and coastal feature by single laser pulse.
At home, Huazhong University of Science and Technology, Shanghai ray machine institute, Changchun ray machine institute, Xi'an ray machine institute, Chinese Marine University, west
The units such as peace mapping research institute all once carried out the development demonstration of laser underwater detection equipment, but did not all form commodity.
Siom of Chinese Academy of Sciences and marine charting research institute of naval once under the subsidy of National 863 plan etc., had carried out airborne
The research of Laser bathymetry completed system prototype in 2004, and has successfully carried out flight measurement reality at China South Sea
It tests, obtains valuable test data.But using targets such as the underwater oil spillings of laser radar multi-channel detection, similar is set
Standby develop has not been reported.Therefore, there is an urgent need to domestic-developed marine oil spill detecting laser radar equipment, are point of underwater oil spilling
Cloth detection, underwater oil spilling diffusion process monitor and endanger the effective observation method of the offers such as early warning.
Although the main research institute of domestic oceanographic lidar has carried out the laser radar hydrospace detection skill of long period
The exploration and research of art, sea light machine institute as above, Chinese Marine University etc., but the marine oil spill exploring laser light thunder that document can be looked at present
Specific report is had not yet to see up to product.
Summary of the invention
The technical problem to be solved by the present invention is it is sharp to have overcome the deficiencies of the prior art and provide a kind of marine oil spill detection
Optical radar, the radar system are designed using separation-type and modularized structure, will can produce swashing for two wavelength laser of 532nm and 1064nm
Light device, Cassegrain's formula telescope include five optical treatment channels, detector, light scanning unit, secondary power supply, complete machines
The groups such as cable are combined into a whole standalone module, constitute laser sensor part；By laser control cabinet, system control and letter
Number processing cabinet, other electronic apparatus combinations such as display are that a whole standalone module is integrated within a cabinet, are constituted
System control and signal processing；Structure for mounting platform is according to different carrying platform and use environment, and design is using scanning
The devices such as the independently installed device of system, system isolation enable laser radar to work suitable for outfield.It is traditional underwater with sonar etc.
Detection means are compared, laser radar have many advantages, such as the water surface and it is underwater it is detectable, detection accuracy is high.Water is carried out through the invention
The spatial distribution and discriminance analysis of lower oil spilling directly influence the estimation to underwater oil spilling movement Diffusion Law, and then influence people
To Detection & Controling such as oil spill etc..
The object of the invention is achieved by the following technical programs:
A kind of marine oil spill detecting laser radar, including laser sensor unit and signal processing and control unit；
The laser sensor unit includes Laser emission subsystem, optics receiving subsystem and optical scanner subsystem；
The Laser emission subsystem is for emitting dual-wavelength laser；The optical scanner subsystem for make Laser emission subsystem and
Optics receiving subsystem is scanned along desired trajectory；
The optics receiving subsystem includes Cassegrain telescope, Multi-channel optical processing unit, multi channel detector；
The optical axis of the dual-wavelength laser of the Laser emission subsystem transmitting and the reception light shaft coaxle of Cassegrain telescope；The card
Plug Green's telescope exports received reflection laser to the Multi-channel optical processing unit, Multi-channel optical processing unit pair
Output is to the multi channel detector after reflection laser carries out wave length beam splitting processing, polarization beam splitting processing and narrow-band filtering processing；
Multi channel detector carries out photoelectric conversion to the reflection laser received and obtains electric signal；
The signal processing and control unit are acquired the electric signal, store and show.
Above-mentioned marine oil spill detecting laser radar, the Laser emission subsystem use dual-wavelength solid laser.
Above-mentioned marine oil spill detecting laser radar, the wavelength difference of the dual-wavelength laser of the Laser emission subsystem transmitting
For 532nm and 1064nm；The single pulse energy for the laser that wavelength is 532nm and wavelength is 1064nm is all larger than 1mJ, and pulse weight
Complex frequency is 10kHz, and degree of polarization is 100:1.
Above-mentioned marine oil spill detecting laser radar, it is 532nm's that the Multi-channel optical processing unit, which includes at least wavelength,
Channel that channel that vertical channel that parallel channels, wavelength are 532nm, wavelength are 590nm, wavelength are 647nm, wavelength are
The channel of 1064nm.
Above-mentioned marine oil spill detecting laser radar, the number of channels of the multi channel detector are more than or equal to Laser emission
The number of wavelengths of system.
The optics bore of above-mentioned marine oil spill detecting laser radar, the Cassegrain telescope is 200mm, and visual field is
6mrad。
Above-mentioned marine oil spill detecting laser radar, the Multi-channel optical processing unit include dichronic mirror 1, dichronic mirror 2, divide
Look mirror 3, polarization splitting prism, the first focus lamp, the first optical filter, the second focus lamp, the second optical filter, tertiary focusing mirror,
Three optical filters, the 4th focus lamp, the 4th optical filter, the 5th focus lamp, the 5th optical filter；The Cassegrain telescope will receive
Reflection laser export to the dichronic mirror 1 of Multi-channel optical processing unit, dichronic mirror 1 reflection laser is divided into two bundles after output to
Dichronic mirror 2 and dichronic mirror 3, after the reflection laser that dichronic mirror 2 receives itself is divided into two bundles output to polarization splitting prism and
The first passage of multi channel detector, output is to multi-pass after the reflection laser that polarization splitting prism receives itself is divided into two bundles
The second channel and third channel of road detector, output is to more after the reflection laser that dichronic mirror 3 receives itself is divided into two bundles
The fourth lane and Five-channel of channel detector；
The reflection laser that the dichronic mirror 2 exports successively enters multichannel after the first optical filter, the first focus lamp and visits
Survey the first passage of device；The reflection laser of polarization splitting prism output successively enters after the second optical filter, the second focus lamp
The second channel of multi channel detector；The reflection laser of polarization splitting prism output successively passes through third optical filter, tertiary focusing
Enter the third channel of multi channel detector after mirror；The reflection laser that dichronic mirror 3 exports successively passes through the 4th optical filter, the 4th poly-
Jiao Jinghou enters the fourth lane of multi channel detector；The reflection laser that dichronic mirror 3 exports successively passes through the 5th optical filter, the 5th
Enter the Five-channel of multi channel detector after focus lamp.
The beam size of above-mentioned marine oil spill detecting laser radar, the optical scanner subsystem is greater than 200mm, and maximum is swept
Retouching speed is more than 1200 revs/min.
The sample rate of above-mentioned marine oil spill detecting laser radar, each channel of the multi channel detector is not less than
1GHz, temporal resolution are not less than 1ns.
Above-mentioned marine oil spill detecting laser radar, further includes inertial navigation and GPS antenna；The GPS antenna receives external GPS letter
Output is to inertial navigation after number, and the inertial navigation can be realized positioning using GPS signal, at the same inertial navigation can the detection of Measuring Oceanic oil spilling it is sharp
All attitude angles of optical radar.
Above-mentioned marine oil spill detecting laser radar, further includes optical camera；The optical camera is used to acquire the figure of ocean
As information.
The dual-wavelength laser of Laser emission subsystem transmitting is divided into two by above-mentioned marine oil spill detecting laser radar
Part, first part are used as and export referring to laser to the Cassegrain telescope, card plug lattice for irradiating target, second part
Woods telescope is exported received referring to laser to the Multi-channel optical processing unit, and Multi-channel optical processing unit is to reference
Output is to the multi channel detector after laser carries out wave length beam splitting processing, polarization beam splitting processing and narrow-band filtering processing；Multi-pass
Road detector carries out photoelectric conversion to the reference laser received and obtains electric signal.
The present invention has the following beneficial effects: compared with the prior art
(1) present invention is integrated with dual wavelength transmitting, and multichannel receives detecting function, the achievable water surface and submarine target optics
Characteristic more fully detects, and such hydrospace detection laser radar with Polarization Detection still belongs to the first time development at home, can compare
Existing laser radar provides more target properties, improves the ability that laser radar detection identifies different targets in ocean；
(2) the large-aperture optical sweeping scheme that the present invention designs can realize quickly sweeping for large-caliber laser transmitting-receiving optical system
It retouches, by the design of Fresnel scan prism, the faster scanning speed of heavy-caliber optical system is obtained, to improve target acquisition water
Divide resolution equally；
(3) high speed acquisition is handled while the integrated signal processor of high speed that the present invention designs can realize 5 channel, single-pass
Road sampling rate is to 1GHz, to improve target acquisition vertical resolution；
(4) the complete machine mounting structure that the present invention designs can realize laser radar installing and using in different platform, make laser
Radar is suitble to outfield work.
Detailed description of the invention
Fig. 1 is the working principle of the invention schematic diagram；
Fig. 2 is complete machine theory of constitution block diagram of the invention；
Fig. 3 is Multi-channel optical processing unit functional block diagram of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to implementation of the invention
Mode is described in further detail.PMT is photomultiplier tube, and APD is avalanche photodide
A kind of marine oil spill detecting laser radar, including laser sensor unit, signal processing and control unit, inertial navigation,
GPS antenna, optical camera.
The laser sensor unit includes Laser emission subsystem, optics receiving subsystem and optical scanner subsystem.
The Laser emission subsystem uses dual-wavelength solid laser, for emitting dual-wavelength laser, dual-wavelength laser
Wavelength be respectively 532nm and 1064nm；The single pulse energy for the laser that wavelength is 532nm and wavelength is 1064nm is all larger than
1mJ, and pulse recurrence frequency is 10kHz, and degree of polarization is 100:1.
The optical scanner subsystem is for scanning Laser emission subsystem and optics receiving subsystem along desired trajectory；
The beam size of optical scanner subsystem is greater than 200mm, and maximum sweep rate is more than 1200 revs/min.
The optics receiving subsystem includes Cassegrain telescope, Multi-channel optical processing unit, multi channel detector；
The optical axis of the dual-wavelength laser of the Laser emission subsystem transmitting and the reception light shaft coaxle of Cassegrain telescope, card plug lattice
The optics bore of woods telescope is 200mm, visual field 6mrad.The Cassegrain telescope exports received reflection laser
To the Multi-channel optical processing unit, Multi-channel optical processing unit carries out wave length beam splitting processing, polarization point to reflection laser
Output is to the multi channel detector after beam processing and narrow-band filtering processing；Multi channel detector to the reflection laser received into
Row photoelectric conversion obtains electric signal.
The Multi-channel optical processing unit includes dichronic mirror 1, dichronic mirror 2, dichronic mirror 3, polarization splitting prism, first poly-
Jiao Jing, the first optical filter, the second focus lamp, the second optical filter, tertiary focusing mirror, third optical filter, the 4th focus lamp, the 4th filter
Mating plate, the 5th focus lamp, the 5th optical filter.Wherein dichronic mirror 1, dichronic mirror 2, the first focus lamp, the first optical filter constitute wavelength
For the channel of 590nm；Dichronic mirror 1, dichronic mirror 2, polarization splitting prism, the second focus lamp, the second optical filter constitute the flat of 532nm
Row of channels；Dichronic mirror 1, dichronic mirror 2, polarization splitting prism, tertiary focusing mirror, third optical filter constitute the vertical channel of 532nm；
Dichronic mirror 1, dichronic mirror 3, the 4th focus lamp, the 4th optical filter constitute the channel that wavelength is 647nm；Dichronic mirror 1, dichronic mirror 3,
Five focus lamps, the 5th optical filter constitute the channel that wavelength is 1064nm.
The number of channels of multi channel detector is more than or equal to the number of channels of Multi-channel optical processing unit；Multi-channel detection
The sample rate in each channel of device is not less than 1GHz, and temporal resolution is not less than 1ns.
The dual-wavelength laser of the Laser emission subsystem transmitting is divided into two parts, and first part is used to irradiate target,
Second part is used as and exports referring to laser to the Cassegrain telescope.
The Cassegrain telescope exports received reflection laser to the dichronic mirror 1 of Multi-channel optical processing unit,
To dichronic mirror 2 and dichronic mirror 3, the reflection that dichronic mirror 2 receives itself swashs for output after reflection laser is divided into two bundles by dichronic mirror 1
Light is exported after being divided into two bundles to the first passage of polarization splitting prism and multi channel detector, and polarization splitting prism receives itself
To reflection laser be divided into two bundles after output to the second channel and third channel of multi channel detector, dichronic mirror 3 connects itself
Fourth lane and Five-channel of the output to multi channel detector after the reflection laser received is divided into two bundles.
The reflection laser that the dichronic mirror 2 exports successively enters multichannel after the first optical filter, the first focus lamp and visits
Survey the first passage of device；The reflection laser of polarization splitting prism output successively enters after the second optical filter, the second focus lamp
The second channel of multi channel detector；The reflection laser of polarization splitting prism output successively passes through third optical filter, tertiary focusing
Enter the third channel of multi channel detector after mirror；The reflection laser that dichronic mirror 3 exports successively passes through the 4th optical filter, the 4th poly-
Jiao Jinghou enters the fourth lane of multi channel detector；The reflection laser that dichronic mirror 3 exports successively passes through the 5th optical filter, the 5th
Enter the Five-channel of multi channel detector after focus lamp.
Cassegrain telescope is exported received referring to laser to the Multi-channel optical processing unit, Multi-channel optical
Processing unit is to output after carrying out wave length beam splitting processing, polarization beam splitting processing and narrow-band filtering processing referring to laser to the multi-pass
Road detector；Multi channel detector carries out photoelectric conversion to the reference laser received and obtains electric signal.
To inertial navigation, it is fixed that the inertial navigation can be realized using GPS signal for output after the GPS antenna receives external GPS signal
Position, while all attitude angles of Measuring Oceanic oil spilling detecting laser radar are capable of in inertial navigation.The optical camera is for acquiring ocean
Image information.
Embodiment:
The principle of the present invention are as follows: when marine oil spill detecting laser radar works, visible waveband is emitted by laser emission element
The dual-wavelength laser of 532nm and the near infrared band 1064nm water surface, Cassegrain telescope receive the optical signal of target scattering, light
After signal enters optics reception treatment channel, the processing such as color separation, polarization spectro, narrow-band filtering is carried out, echo-signal is divided into water
Lower target, water surface 532nm is parallel, 532nm is vertical, the oily fluorescence of 590nm, determines the Raman scattering of measured target ingredient, 647nm water
Channel, this 5 channels 1064nm, subsequently through to multiple multichannel laser radar echo signals photoelectric conversion, acquisition, analysis,
Inverting and storage realize laser radar signal target acquisition, as shown in Figure 1.
A kind of marine oil spill detecting laser radar is pacified by laser sensor unit, signal processing and control unit and platform
Assembling structure composition, collectively forms marine oil spill detecting laser radar, overflows for the detection for the oil that stays under water under water, and to underwater
The detected with high accuracy of the targets such as oil, green tide, sea ice, seabed, as shown in Figure 2.
Laser control cabinet controls dual-wavelength solid laser transmitting visible light wave range 532nm and near infrared band
The Gao Zhongying laser of 1064nm, and turned back device by optical path, so that Laser emission optical axis and Cassegrain telescope is received optical axis
Coaxial matching.Cassegrain telescope receives the optical signal of target scattering, and optical signal is divided by Multi-channel optical processing unit
532nm is parallel, 532nm is vertical, five detection channels of 590nm, 647nm, 1064nm, as shown in Figure 3.Multi channel detector is by light
Signal is converted to electric signal.Optical scanner subsystem controls Laser emission subsystem and optics by rotary optical scan prism
Receiving subsystem presses scheduled circular trajectory scan, realizes the three-dimensional position detection of target.It is adopted by detector power module, signal
Collection processing module, storage display module composition signal processor complete photoelectric conversion after each channel signal acquisition, handle, deposit
Storage and display, the monitoring and control of system each unit, signal acquisition result are shown by industrial personal computer display.Complete machine mounting structure can
To install interface according to the equipment of airborne platform and boat-carrying platform, pass through installation fixed structure, equipment vibration absorber, cabinet etc.
Each component part of laser radar is mounted on using platform by device.In addition, marine oil spill detecting laser radar further includes GPS
Antenna, inertial navigation and optical camera, output is believed to inertial navigation, the inertial navigation using GPS after the GPS antenna receives external GPS signal
It number can be realized positioning, while all attitude angles of Measuring Oceanic oil spilling detecting laser radar are capable of in inertial navigation, utilize transmitting laser
Time delay between reflection laser calculates the distance between radar of the present invention and measured target, in conjunction with rotary optical scanning rib
The pivoting angle data of mirror can be realized the accurate positioning of measured target.Optical camera is used to acquire the image information of ocean.
Dual-wavelength solid laser transmitter can realize the same mouth of multi-wavelength by frequency doubling technology and dual wavelength beam expanding technology
Diameter transmitting, furthermore using the light source of dual-wavelength solid laser and other assemblies separate design thinking, using optical fiber light-guiding, in conjunction with
It realizes that the temperature of high power light source controls using wind-cooling heat dissipating mode, improves the application convenience of system entirety, while effectively subtracting
Volume, weight and the reliability of mini system.The laser emission wavelength is 532nm and 1064nm, and each wavelength single pulse energy is
Greater than 1mJ, pulse recurrence frequency 10kHz, degree of polarization 100:1.
Cassegrain telescope is made of primary mirror, secondary mirror, diaphragm and collimating mirror.The telescope uses reflective off-axis card plug
Green's telescope has the characteristics that the integrated and production that tube length is shorter, visual field is bigger, is more suitable for laser radar system, optics
Bore is 200mm, visual field 6mrad.
Multi-channel optical processing unit application wave length beam splitting, polarization beam splitting, narrow-band filtering technology, optical signal is divided into
532nm is parallel, 532nm is vertical, 5 receiving channels of 590nm, 647nm, 1064nm, and Cassegrain telescope realizes laser radar
Multi-channel detection.Its medium wavelength is the target information on the laser signal measurement sea of 1064nm, and the laser that wavelength is 532nm is believed
Number underwater target information of measurement, wavelength is that the laser signal of 590nm can reflect oily fluorescence information, for determine target at
Point, wavelength is the Raman scattering situation of the laser signal measurement water of 647nm.
Optical scanner subsystem is made of optical scanner prism and rotating mechanism.To guarantee that large-caliber laser receives and dispatches light beam energy
It is enough quickly scanned, design heavy caliber fresnel prism group refraction type scan prism will receive and dispatch light beam deviation, utilize heavy caliber
Rotating mechanism rotate it quickly around optical axis, realize detection light beam circumferentially movement, the movement of cooperating equipment carrying platform,
Realize the 2-D optical scanning to target.Large-aperture optical scan prism uses the form of fresnel prism group, makes prism center of gravity
It reduces simultaneously close to rotation center, while reducing prism weight, reach steady atwirl target.The light beam of optical scanning system
Bore is greater than 200mm, and maximum sweep rate is more than 1200 revs/min.
Laser control cabinet realizes the power supply and control to dual wavelength high repeated frequency solid state laser device.
Signal processor is by industrial personal computer, detector power module, signal acquisition process module, servo control module, storage
Display module composition.All units are integrated in an industry control cabinet, are effectively reduced number of devices, improve the reliable of equipment
Property and ease for use.Industrial personal computer is responsible for operation control, data inversion and the display function of entire signal processor.Detector power supply mould
Block and signal acquisition process module complete the power supply to each channel detector and electric echo signal are acquired and are handled, and realize
The output of 5 channels, sampling rate for each channel is up to 1GHz, temporal resolution 1ns.Servo control module is realized to optical scanning system
Control, and acquire real-time light beam orientation angle.The solid state disk card that display module uses 1TB is stored, to record in real time
Laser radar echo signal, communication control instruction, status information.
According to the platform of installing and using of laser radar system, such as aircraft, steamer, complete machine mounting structure is designed, realizes and swashs
Optical detection and ranging system can adapt to the use condition of different carrying platforms, and laser radar is made to be suitble to outfield work.
Marine oil spill detecting laser radar of the invention has fluorescence and Raman channel, and it is more can to provide detected target
Optical signature information.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (12)
1. a kind of marine oil spill detecting laser radar, it is characterised in that: including laser sensor unit and signal processing and control
Unit；
The laser sensor unit includes Laser emission subsystem, optics receiving subsystem and optical scanner subsystem；It is described
Laser emission subsystem is for emitting dual-wavelength laser；The optical scanner subsystem is for making Laser emission subsystem and optics
Receiving subsystem is scanned along desired trajectory；
The optics receiving subsystem includes Cassegrain telescope, Multi-channel optical processing unit, multi channel detector；It is described
The optical axis of the dual-wavelength laser of Laser emission subsystem transmitting and the reception light shaft coaxle of Cassegrain telescope；The card plug lattice
Woods telescope exports received reflection laser to the Multi-channel optical processing unit, and Multi-channel optical processing unit is to reflection
Output is to the multi channel detector after laser carries out wave length beam splitting processing, polarization beam splitting processing and narrow-band filtering processing；Multi-pass
Road detector carries out photoelectric conversion to the reflection laser received and obtains electric signal；
The signal processing and control unit are acquired the electric signal, store and show.
2. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: the Laser emission subsystem
System uses dual-wavelength solid laser.
3. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: the Laser emission subsystem
The wavelength of the dual-wavelength laser of system transmitting is respectively 532nm and 1064nm；The laser that wavelength is 532nm and wavelength is 1064nm
Single pulse energy is all larger than 1mJ, and pulse recurrence frequency is 10kHz, and degree of polarization is 100:1.
4. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: at the Multi-channel optical
Manage device include at least wavelength be 532nm parallel channels, wavelength be 532nm vertical channel, wavelength be 590nm channel,
The channel that channel that wavelength is 647nm, wavelength are 1064nm.
5. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: the multi channel detector
Number of channels be more than or equal to Laser emission subsystem number of wavelengths.
6. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: the Cassegrain looks in the distance
The optics bore of mirror is 200mm, visual field 6mrad.
7. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: at the Multi-channel optical
Reason device includes dichronic mirror 1, dichronic mirror 2, dichronic mirror 3, polarization splitting prism, the first focus lamp, the first optical filter, the second focusing
Mirror, the second optical filter, tertiary focusing mirror, third optical filter, the 4th focus lamp, the 4th optical filter, the 5th focus lamp, the 5th filter
Piece；The Cassegrain telescope exports received reflection laser to the dichronic mirror 1 of Multi-channel optical processing unit, dichronic mirror
1 reflection laser is divided into two bundles after output to dichronic mirror 2 and dichronic mirror 3, the reflection laser that dichronic mirror 2 receives itself is divided into
It is exported after two beams to the first passage of polarization splitting prism and multi channel detector, polarization splitting prism receives itself anti-
It penetrates after laser is divided into two bundles and exports to the second channel and third channel of multi channel detector, what dichronic mirror 3 received itself
Fourth lane and Five-channel of the output to multi channel detector after reflection laser is divided into two bundles；
The reflection laser that the dichronic mirror 2 exports successively enters multi channel detector after the first optical filter, the first focus lamp
First passage；The reflection laser of polarization splitting prism output successively enters multi-pass after the second optical filter, the second focus lamp
The second channel of road detector；The reflection laser of polarization splitting prism output is successively after third optical filter, tertiary focusing mirror
Into the third channel of multi channel detector；The reflection laser that dichronic mirror 3 exports successively passes through the 4th optical filter, the 4th focus lamp
Enter the fourth lane of multi channel detector afterwards；The reflection laser that dichronic mirror 3 exports successively passes through the 5th optical filter, the 5th focusing
Enter the Five-channel of multi channel detector after mirror.
8. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: the optical scanner subsystem
The beam size of system is greater than 200mm, and maximum sweep rate is more than 1200 revs/min.
9. a kind of marine oil spill detecting laser radar according to claim 1, it is characterised in that: the multi channel detector
The sample rate in each channel be not less than 1GHz, temporal resolution is not less than 1ns.
10. a kind of marine oil spill detecting laser radar described according to claim 1~one of 9, it is characterised in that: further include being used to
It leads and GPS antenna；Output can be real using GPS signal to inertial navigation, the inertial navigation after the GPS antenna receives external GPS signal
It now positions, while all attitude angles of Measuring Oceanic oil spilling detecting laser radar are capable of in inertial navigation.
11. a kind of marine oil spill detecting laser radar described according to claim 1~one of 9, it is characterised in that: further include light
Learn camera；The optical camera is used to acquire the image information of ocean.
12. a kind of marine oil spill detecting laser radar described according to claim 1~one of 9, it is characterised in that: swash described
The dual-wavelength laser of light emitting subsystem transmitting is divided into two parts, and first part is for irradiating target, and second part is as ginseng
It exports according to laser to the Cassegrain telescope, Cassegrain telescope is exported received referring to laser to the multichannel
Optical processing system, Multi-channel optical processing unit carry out wave length beam splitting processing, polarization beam splitting processing and narrowband to referring to laser
Output is to the multi channel detector after filtering processing；Multi channel detector is obtained to what is received referring to laser progress photoelectric conversion
Obtain electric signal.
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