CN108181666A

CN108181666A - A kind of wide area covering narrow multiple spot emphasis scouts detection technique

Info

Publication number: CN108181666A
Application number: CN201711426313.3A
Authority: CN
Inventors: 于清华; 孙胜利
Original assignee: Shanghai Institute of Technical Physics of CAS
Current assignee: Shanghai Institute of Technical Physics of CAS
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2018-06-19
Anticipated expiration: 2037-12-26
Also published as: CN108181666B

Abstract

The invention discloses a kind of wide area covering narrow multiple spot emphasis to scout detection technique.The present invention realizes " wide area low resolution " covering function of search using " short relevant baseline lens are to full filed waveguide array " signal acquisition, realizes that " narrow high-resolution " multiple spot emphasis scouts detection function using " relevant baseline lens local area small field of view waveguide array entirely " signal acquisition.The detection technique movement-less part, low-power consumption carry out multiple target emphasis monitoring simultaneously, tracking, positioning and identification in certain wide scope, can be widely used for high-altitude vehicle to the detection of earth's surface or moving air target and identification field.

Description

A kind of wide area covering narrow multiple spot emphasis scouts detection technique

Technical field

The invention belongs to the detection on a surface target of photodetection field, particularly high-altitude vehicle and identification field, moulds Intend " hawkeye " search target and identify the function of goal behavior, realize that Novel wide-area covering narrow multiple spot emphasis scouts detection skill Art.

Background technology

U.S. national defense Advanced Research Projects affix one's name to (DARPA) joint U.S. ten headed by Carnegie Mellon University from 1996 Ji Suo institution of higher learning and research institution take part in imitative hawkeye video monitoring major project VSAM (Video Surveillance and ) and VACE (Video Analysi and Content Extraction) Monitoring.VASM projects focus mainly on height The detection on a surface target of empty aircraft and identification problem, simulate the search target of hawkeye and understand the function of goal behavior. VSAM can visualize target following positioning result.VACE projects can predict object run direction according to target trajectory, from And analyze the threat degree of target.

The Fayman of Israel then changes in relative position for target and sensor and target scale is caused to change, target A kind of the problem of information content changes, it is proposed that active tracking method of Zoom control --- zoom tracks.

Similar, Ben Tordoff and the David Murray of Britain then propose the reaction control method of Zoom control, mould The high function of seeing target clearly in the air of hawkeye is imitated.Reaction control method uses central projection method, and it is deep that self adaptive pantographic retains target Degree and scene depth ratio, and the Depth Motion according to caused by self adaptive pantographic compensates to obtain the affine throwing for not needing to automatically correct Image method so that method is provided with rotational invariance.

Tokyo polytechnical university then devises a wide area tracking system according to the physiological structure of hawkeye.According to hawkeye profit Target is searched for binocular vision, the principle of monocular vision object observing devises cradle head control platform of the tool there are three detector, The movement on head when simulating hawk object observing, three detectors are respectively that a focal length camera and two general cameras form, The middle monocular vision using focal length camera simulation hawkeye generates high-resolution visual field to target, and two general cameras then form Wide area visual angle imitates the binocular vision search target of hawkeye, target location is provided for focal length camera.This method is due to detector number Purpose reason, the method are relatively suitble to the target acquisition of safety-security area.

The mode that widely applied " hawkeye " system is mostly combined using traditional optical zoom system, pancreatic system or more camera lenses.With The development of micronano optical, coherent optics and computer science, novel optical detection means start to be developed, and the present invention exists The wide area covering narrow multiple spot emphasis an of type " hawkeye " operating mode proposed on the basis of integrated optical coherence optics scouts inspection Survey technology.

The detection technique has the advantages that movement-less part, merotype operating power consumption are low, with the further maturation of technology, It is expected to be widely applied to moving target Photoelectric Detection and micro-nano satellite field.

Invention content

The present invention discloses a kind of Novel wide-area covering narrow multiple spot emphasis and scouts detection technique.

The detection technique is realized based on a kind of novel photoelectric-detection system.The operation principle of the photoelectric detecting system is According to Van Cittert-Zernike theorems, different skies are carried out using the thousands of lens pair and orthocoupler of integrated optics Between coherent coefficient under frequency detection, and then the image of object is obtained by inverse Fourier transform.It, should based on this principle For the lens of system to the resolution ratio of corresponding work baseline length decision systems, lens diameter and waveguide array size determine that work regards Field size.Therefore, different visual fields and the work of different resolution can be realized using work baseline and optical waveguide array by selection Operation mode.

Detection technique schematic diagram such as Fig. 1 institutes are scouted based on the wide area of integrated optics and coherent optics covering narrow multiple spot emphasis Show.A101 is that wide area covers the formal figure that narrow multiple spot emphasis scouts detecting system, and A102 is the one of spiral arm side view of system Figure, including lens pair and optical waveguide coherent array, wherein lens are intermediate to being a pair about lens symmetrical in spiral arm The lens in region are denoted as B to the shorter relevant baseline of composition_S, the short baseline lens of a spiral arm are to forming ring in the detection system Band, the lens at edge are denoted as B to the longer correlation butt line of composition_L.A107 is four orthogonal balanced detectors in system.Target beam It converges through lens and is received by optical waveguide array, the optical waveguide coupled of the same visual field point of pairs of lens relevant obtains coherent fringe Amplitude and phase difference.Under wide area low resolution operating mode, the short relevant baseline lens of annulus are to corresponding complete among detecting system Optical waveguide array (A103) works, and long coherence baseline lens do not work to corresponding optical waveguide array (A104), full waveguide array Work can cover wide area, and working, relevant baseline is short, and System spatial resolution is relatively low.Under narrow high-resolution operating mode, Detecting system is concerned with baseline (including long coherence baseline, short relevant baseline) lens to corresponding local optical waveguide array (A105 entirely And A106) work successively in the position of field motion with moving target (C101), the optical waveguide array in other regions does not work, office Portion's waveguide array work covering narrow, working, relevant baseline length is comprehensive, and System spatial resolution is relatively high.

It is as follows that wide area covering narrow multiple spot emphasis scouts detection technique implementation method：

1, under wide area low resolution operating mode, integrated optics and the short relevant baseline lens of coherence imaging system are to corresponding Full optical waveguide array (such as Fig. 1, intermediate annulus A103) work, long coherence baseline lens to corresponding optical waveguide array (such as Fig. 1, A104 it) does not work.

2, under narrow high-resolution operating mode, integrated optics and coherence imaging system are concerned with baseline (including long coherence entirely Baseline, short relevant baseline) lens to corresponding local optical waveguide array (such as Fig. 1, A105 and A106) with moving target (such as Fig. 1, C101 it) works successively in the position of field motion, the optical waveguide array in other regions does not work.

Under above two operating mode, only part optical waveguide array works, and therefore, gathered data amount and operation power consumption are all It compares relatively low.

Description of the drawings

Fig. 1 is to scout detecting system schematic diagram based on integrated optics and coherent optics wide area covering narrow multiple spot emphasis.

Fig. 2 is the imaging effect figure that Novel wide-area covering narrow multiple spot emphasis scouts detecting system.

Specific embodiment

It is as shown in Figure 1 based on integrated coherent technique imaging system figure.According to application demand design system parameter such as following table institute Show.Furthermore it is possible to increase the optical waveguide array scale after each lens to increase working field of view.

Table 1：Integrated coherent technique imaging system parameters

Wave band	2.5-4.5um
		Spiral arm number	39
Lens diameter	4.01mm
		Per arm lens logarithm	30
Optical waveguide array scale after per lens	10×10
		Electrooptical device quantity	468000 yuan

It is as shown in the table that the system works in the systematic parameter that wide area covering narrow multiple spot emphasis is scouted under detection pattern.

Table 2：Operating mode parameter

Title	Big visual field	Small field of view
			Visual field	1 degree × 1 degree	0.3 degree × 0.3 degree
Resolution ratio	60 rads	3 rads
			Work longest baseline	0.061m	0.241m
Work optical waveguide array scale	10×10	2×2
			Work baseline number	10	30
Total working electrooptical device quantity	156000 yuan (33% of total quantity)	18720 yuan (4% of total quantity)

The working performance of the system is emulated as shown in Fig. 2, D101 be big visual field low resolution under imaging effect, D111, D112 and D113 are the design sketch neglected under field high resolution, relative to D101 imaging resolutions height, can see target clearly Details.

Under big visual field wide area exploration pattern, the power consumption of system work is only the 33% of peak power, in small field of view high score It distinguishes under patrolling pattern, the power consumption of system work is only the 4% of peak power.

In addition, in the system work process, without moving component, only by opening the waveguide array of region-of-interest, complete The tracking of moving target.

Claims

1. a kind of wide area covering narrow multiple spot emphasis scouts detection technique, it is characterised in that method is as follows：

1) under wide area low resolution operating mode, integrated optics and the short relevant baseline lens of coherence imaging system are to corresponding full light Waveguide array works, and long coherence baseline lens do not work to corresponding optical waveguide array；

2) under narrow high-resolution operating mode, integrated optics and coherence imaging system are concerned with baseline entirely, including long coherence baseline, Short relevant baseline full impregnated mirror opens corresponding local optical waveguide array work, and with moving target the position of field motion according to Task, the optical waveguide array in other regions do not work.