CN103499818B - A kind of infrared and laser compound detection system - Google Patents
A kind of infrared and laser compound detection system Download PDFInfo
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- CN103499818B CN103499818B CN201310469759.XA CN201310469759A CN103499818B CN 103499818 B CN103499818 B CN 103499818B CN 201310469759 A CN201310469759 A CN 201310469759A CN 103499818 B CN103499818 B CN 103499818B
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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
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
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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
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S17/14—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein a voltage or current pulse is initiated and terminated in accordance with the pulse transmission and echo reception respectively, e.g. using counters
-
- 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
- G01S17/66—Tracking systems using electromagnetic waves other than radio waves
-
- 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
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
Abstract
The open a kind of infrared and laser compound detection system of the present invention, this system can realize the accurate sensing of tenacious tracking to infrared moving target and laser, and realizes the range observation to target.This system has Zigzag type Shared aperture receive optical head, use outside color separation film separate red and laser, infrared camera to mobile Small object imaging, according to the rough tracking of target centroid position control dimensional turntable and the accurate adjustment of quick deflecting mirror whole, make Laser emission accurately point to target.Photomultiplier receives laser echo signal, calculates target range information according to the main ripple signal of Laser emission and echoed signal.Present system can be mounted in airborne, missile-borne and satellite platform, realizes the three-dimensional measurement to infrared target, for aggregate decision provides Information Assurance.
Description
Technical field:
The present invention relates to spatial point target detection and location technology, be specifically related to a kind of infrared laser compound detection system, can be applicable to terminal guidance and Space Object Detection.
Background technology:
Traditional large face battle array infrared focus plane detection noncooperative target, there is high sensitivity, high two-dimensional space resolution and the great dynamic range feature after joining rear dimensional turntable, the image processor to target and tracking can be realized under complex environment, and there is stronger anti-electromagnetic interference capability.But infrared imaging only can obtain the two-dimensional signal of target, accurate distance and the velocity information of target cannot be obtained.IR Passive Imaging and Laser Active Detection are combined, forms infrared/laser bimodulus complex probe, obtain the three-dimensional information of the angle-angle-distance of target, and high speed information disposal system can be coordinated, data fusion target velocity and trace information.
The advantage adopting infrared imaging/Laser Active Detection Compound Guidance Technology can play both makes up respective deficiency, first infrared imaging quick detection localizing objects in larger visual field is utilized, then utilize Laser Active Detection to obtain the high-resolution intensity image of suspected target and Range Profile, realize the identification of true and false target.And according to acquisition Fusion, can give overall with maximum Information Assurance, make a policy.
Summary of the invention:
The object of this patent is to provide a kind of novel pointing compound detection system being applied to terminal guidance and Space Object Detection, adopts IR Passive detection of a target orientation accurately to guide laser guide, adopts single photon counting technology detection of a target Distance geometry speed.This patent is conducive to improving totally to detection and identify and the tracking power of target, gives overall Information Assurance fully.
Native system structure as shown in Figure 1, comprising: rough tracking mechanism 1, optical telescope 2, fast deflecting mirror 3, generating laser 4, spectrum groupware 5, photomultiplier 6, optical alignment assembly 7, infrared camera 8, laser mirror 9, optical focus assembly 10.
Described rough tracking mechanism 1 is by angular displacement turntable (pitching ± 15 °, stepping accuracy 200urad) and universal stage (360 °, stepping accuracy 250urad) unitized construction; Described optical telescope 2 is reflective logical light telescopic systems; Described quick deflecting mirror 3 is quick deflecting mirrors of Piezoelectric Ceramic, selects the quick deflecting mirror of piezoelectricity of the S334 model of PI Corp.; Described generating laser 4 is wavelength is 532nm, and live width is the pulsed laser of 0.5nm, and the angle of divergence is 0.2mrad, and energy is greater than 3uJ; Described spectrum groupware 5 passes through infrared band, the optical module of reflect visible light wave band; Described photomultiplier 6 is single-element detectors of single photon magnitude, selects 10682 type single photon counting pattern blocks of Bin Song company; Described optical alignment assembly 7 is optical modules return laser beam being collimated to photomultiplier photosurface; Described infrared camera 8 is infrared surface array cameras, and infrared focus plane selects the 640*512 medium wave refrigeration mode detector of sofradir company, and picture frame frequency is set to 50Hz; Described laser mirror 9 is visible ray completely reflecting mirrors; Described optical focus assembly 10 is optical modules infrared band light being focused on infrared focus plane;
Described quick deflecting mirror 3, generating laser 4, spectrum groupware 5, photomultiplier 6, optical alignment assembly 7, infrared camera 8, laser mirror 9, optical focus assembly 10 are all fixed on optical telescope 2, and rotate along with rough tracking mechanism 1; Infrared camera 8 and photomultiplier 6 share optical telescope 2; Quick deflecting mirror 3 and laser mirror 9 combination are fixed on generating laser 4 front, and the zero-bit of quick deflecting mirror 3 is pointed to parallel with optical telescope 2 optical axis;
Described generating laser 4 Emission Lasers reflexes to quick deflecting mirror 3 by laser mirror 9, points to infrared target; Target reflects laser echo, after optical telescope 2, reflexes to by spectrum groupware 5 photosurface that optical alignment assembly 7 collimates rear arrival photomultiplier 6, exploring laser light echoed signal; The infrared band spectrum of target, by after optical telescope 2, by spectrum groupware 5 transmission, focuses on the detector focal plane imaging of infrared camera 8 by optical focus assembly 10.
The principle of work of system is as follows:
Rough tracking mechanism 1 and the closed search infrared target of infrared camera 8, ensure that target is in telescope field range, quick deflecting mirror 3 adjusts generating laser 4 and accurately points to fast, pulse laser fine sight target, photomultiplier 6 detection of photons signal, by laser main wave signal and photon echo signal transacting, extract target range.
Rough tracking mechanism is by setting scan mode extensive search target, stop search after finding target pattern, keep target in infrared visual field according to the low frequency adjustment of rough tracking, identifying that target centroid two dimension orientation drives quick deflecting mirror to rotate, is that laser accurately points to target.Photomultiplier receives laser single photon signal, by main ripple and echoed signal relevant treatment, calculates the real range information in real time of target, finally reaches the azimuth-range information measurement of target.
Complete system processing controls block diagram as shown in Figure 3.
This patent has following beneficial effect:
By IR Passive Imaging identification target azimuth, in conjunction with the range observation of active laser high precision, effective acquisition target azimuth and range information, form the angle-angle-range observation to target with high precision, greatly enrich the detection information of target, target survey of deep space and terminal guidance field can be applied in widely.
Accompanying drawing illustrates:
Fig. 1 is the infrared of this patent and laser compound detection system structural drawing;
In figure: 1. rough tracking mechanism; 2. optical telescope; 3. quick deflecting mirror;
4. generating laser; 5. spectrum groupware; 6. photomultiplier;
7. optical alignment assembly; 8. infrared camera; 9. laser mirror;
10. optical focus assembly.
Change schematic diagram in target location in Fig. 2 infrared camera;
In figure: the position of 11. targets outside visual field;
The position of 12. targets in visual field (rough tracking mechanism searching target result).
Fig. 3 system processing controls block diagram.
Embodiment:
Be described in further detail below in conjunction with the embodiment of accompanying drawing to this patent:
1. overall start, rough tracking mechanism 1 starts scanning by the path of setting, and infrared camera 8 ceaselessly identifies and finds target.When target enters infrared visual field, infrared camera 8 finds and lock onto target, and rough tracking mechanism 1 stops scanning.Infrared camera calculates target centroid position, feeds back to main control unit, and master control adjustment rough tracking mechanism 1 is close to infrared image center object image spots position, as Fig. 2 shows.
2. Infrared Targets information and laser echo signal are turned back by optical telescope 2 and are focused on spectrum groupware 5, and spectrum groupware is through infrared band reflect visible light wave band.Infrared band focuses on the imaging focal plane of infrared camera 8 after optical focus assembly 10, infrared camera 8 selects wave band to be the medium-wave infrared camera of 3.7-4.8um, infrared focus plane selects the 640*512 medium wave refrigeration mode detector of sofradir company, and frame frequency exports as 50Hz.Infrared picture data point two-way after collection plate exports, and USB of leading up to is transferred to computer host computer, and store for computer, detect, another road is directly transferred to graphics processing unit.Graphics processing unit obtains the barycenter orientation of target to infrared image real-time analysis process, main control unit is transferred to after barycenter azimuth coding, change the driving circuit that two-way drive singal is transferred to quick deflecting mirror 3 into after main control unit decoding, drive quick deflecting mirror to rotate.Laser instrument Emission Lasers is reflected by laser mirror 9 and arrives quick deflecting mirror 3, and then points to target.
3. after hitting the mark, return laser beam reflexes to optical alignment assembly 7 by optical telescope 2 spectrum groupware 5 of turning back, and finally arrives photomultiplier 6 photosurface.The 10682 type single photon counting pattern blocks of photomultiplier 6(shore pine) respond the single photon information of returning, export TTL pulse signal to unit during survey, during survey, unit launches the main ripple signal of generation in conjunction with pulsed laser transmitter 4, calculate the time interval of each echo single photon and main ripple, result of calculation is all input to main control unit, main control unit extracts the real time interval by time correlation and Poisson filtering algorithm, and is converted to distance value output.
Claims (1)
1. an infrared and laser compound detection system, it comprises: rough tracking mechanism (1), optical telescope (2), fast deflecting mirror (3), generating laser (4), spectrum groupware (5), photomultiplier (6), optical alignment assembly (7), infrared camera (8), laser mirror (9), optical focus assembly (10), is characterized in that:
Described rough tracking mechanism (1) is stepping accuracy to be the 200urad angle of pitch the be angular displacement turntable of ± 15 ° and stepping accuracy are the unitized construction of 360 ° of universal stages of 250urad; Described optical telescope (2) is reflective logical light telescopic system; Described quick deflecting mirror (3) is the quick deflecting mirror of Piezoelectric Ceramic, selects the quick deflecting mirror of piezoelectricity of the S334 model of PI Corp.; Described generating laser (4) is wavelength is 532nm, and live width is 0.5nm, and the angle of divergence is 0.2mrad, and energy is greater than the pulsed laser of 3uJ; Described spectrum groupware (5) is by infrared band, the optical module of reflect visible light wave band; Described photomultiplier (6) is the single-element detector of single photon magnitude, selects 10682 type single photon counting pattern blocks of Bin Song company; Described optical alignment assembly (7) is optical module return laser beam being collimated to photomultiplier photosurface; Described infrared camera (8) is infrared surface array camera, and infrared focus plane selects the 640*512 medium wave refrigeration mode detector of sofradir company, and picture frame frequency is set to 50Hz; Described laser mirror (9) is visible ray completely reflecting mirror; Described optical focus assembly (10) is optical module infrared band light being focused on infrared focus plane;
Described quick deflecting mirror (3), generating laser (4), spectrum groupware (5), photomultiplier (6), optical alignment assembly (7), infrared camera (8), laser mirror (9), optical focus assembly (10) are all fixed on optical telescope (2), and along with rough tracking mechanism (1) rotation; Infrared camera (8) and photomultiplier (6) share optical telescope (2); Quick deflecting mirror (3) and laser mirror (9) combination are fixed on generating laser (4) front, and the zero-bit of quick deflecting mirror (3) is pointed to parallel with optical telescope (2) optical axis;
Described generating laser (4) Emission Lasers reflexes to quick deflecting mirror (3) by laser mirror (9), points to infrared target; Target reflects laser echo, after optical telescope (2), is reflexed to the photosurface arriving photomultiplier (6) after optical alignment assembly (7) collimates, exploring laser light echoed signal by spectrum groupware (5); The infrared band spectrum of target, by after optical telescope (2), by spectrum groupware (5) transmission, focuses on the detector focal plane imaging of infrared camera (8) by optical focus assembly (10).
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| CN201310469759.XA CN103499818B (en) | 2013-10-10 | 2013-10-10 | A kind of infrared and laser compound detection system |
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| CN201310469759.XA CN103499818B (en) | 2013-10-10 | 2013-10-10 | A kind of infrared and laser compound detection system |
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| CN103499818B true CN103499818B (en) | 2015-07-29 |
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| CN113655488A (en) * | 2021-06-30 | 2021-11-16 | 武汉高德红外股份有限公司 | Infrared alarm system for rapid periodic scanning directional distance measurement and distance measurement method thereof |
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| CN114859371A (en) * | 2022-07-07 | 2022-08-05 | 武汉光谷航天三江激光产业技术研究院有限公司 | Unmanned aerial vehicle bee colony high-resolution composite detection system and method |
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