CN207280592U - A kind of three slit EO-1 hyperion moving target detection devices - Google Patents
A kind of three slit EO-1 hyperion moving target detection devices Download PDFInfo
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Abstract
This patent discloses a kind of three slit EO-1 hyperion moving target detection devices.This patent is when hyperspectral imager is scanned imaging, telescopic system to moving target into picture successively through three slit elements, it is imaged in the image planes of spectrometer, single pass can high light spectrum image-forming, the time interval being imaged three times be together decided on by target speed, slit separation, telescopic resolution three times to moving target progress.Target can be identified using spectral information, motion vector computation is carried out to moving target with the three width images at mutual having time interval.This patent replaces over single slit with three slits, and device includes telescope, three slit diaphragms, collimating mirror, dispersion beam splitter, convergence speculum, focus planar detector.It can be greatly improved under complex background condition to the detection probability of moving target detection using the system of this patent.
Description
Technical field
This patent is related to a kind of three slit EO-1 hyperion complex background moving target detection methods and device, and in particular to a kind of
Three slit diaphragms realize the dispersion light splitting type Hyperspectral imaging devices of complex background moving target high time resolution detection.
Background technology
When carrying out infrared acquisition to detection in infrared image sequence with complex background target, according to single band infrared imaging method, it can count
Target motion vectors are calculated, but have higher false alarm rate；Moving target is detected according to common optical spectrum imagers, can be improved spectrally resolved
Rate needs multiple image so as to improve detectivity for moving object detection, such a to be divided scan mode acquisition by dispersion
The mode existing defects of high spectrum image, an only single slit diaphragm after this color dispersion-type spectrometer telescope, to moving-target
A high light spectrum image-forming can only be carried out to target, to obtain the multiframe of target in the past when carrying out EO-1 hyperion detection with scan cycle
The method of image generally use Multiple-Scan observation is realized, due to the more difficult reduction of the scan period for scan mode of pushing broom, thus is adopted
The hyperspectral imager that scanning means of pushing broom is divided with conventional dispersion is difficult to moving target high time resolution detection, and
And larger frame frequency is needed to realize the detection to moving target for moving object detection algorithm.
RX detection algorithms are IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL
The document of PROCESSING.VOL.38.NO.10.OCTOBERD《Adaptive Multiple-Band CFAR Detection
of an Optical Pattern with Unknown Spectral Distribution》A kind of EO-1 hyperion is different in proposing
Normal detection algorithm, the target of spectral singularity can be preferably detected in the case where library of spectra is not required, and be the inspection of EO-1 hyperion target
The method for surveying excellent performance.
The three slit EO-1 hyperion moving target detection methods and device that this patent proposes first carry out target with telescope
It is imaged, then same target becomes three by the picture for sweeping direction arrangement is pushed away through three slit jaws successively, these by dispersion as being divided again
Element is divided, and the spectrum of three pictures after being finally divided has delay, that is, realize one in time in focal plane imaging, these three pictures
Secondary scanning of pushing broom can complete the imaging of three vertical frame dimension spectrum pictures, and document is used to this 3 view data《Adaptive
Multiple-Band CFAR Detection of an Optical Pattern with Unknown Spectral
Distribution》In RX detection algorithms carry out RX detections respectively, obtain target data, the target data to acquisition is closed
The data for obtaining moving target are surveyed in joint inspection, calculate the attribute of moving target.
This patent substitutes single slit with three slits, sweeps direction pushing away, focal plane can be in different time intervals to same movement
Target carries out high light spectrum image-forming three times, and delay between three pictures can be adjusted by adjusting the distance between three slits, thus may be used
With adjustment time resolution ratio, than being improved a lot with the temporal resolution of conventional single slit spectrometer detection moving target, than with
More hyperspectral imager joining image-formings save volume, reduce cost, reduce debugging difficulty, with high spectrum image to mesh
Mark is detected, and than greatly improving the detection probability to complex background moving target with single band object detection method, is solved
Single band detection method detectivity is low, bloom spectrum detecting method temporal resolution is low when complex background moving target detects asks
Topic.
The content of the invention
The purpose of this patent is to provide a kind of EO-1 hyperion moving target detection device using three slit diaphragms, overcomes existing
Have in Target under Complicated Background Detection Techniques that single band imaging detection method detectivity is low, the hyperspectral imager detection method time point
The defects of resolution is low, EO-1 hyperion detection is carried out with high time resolution to complex background moving target, and greatly improves movement mesh
Mark detection probability.
This patent use technical solution be：Three slit EO-1 hyperion moving target detection devices, including telescopic system 2,
Three slits 1, collimating mirror 3, dispersion beam splitter 4, converging lenses 5, calibration mirror 6, detector 7, the first slit 1-1 of three slits, the
Two slit 1-2, the 3rd slit 1-3 are equidistantly arranged, and when hyperspectral imager is scanned imaging, telescopic system 2 is to mesh
Mark 14 is imaged, and target is changed into three pictures after slit successively, and the picture such as floor area 8 is narrow by telescopic system 2, three
Being collimated after seam 1 by collimating mirror 3, the picture after collimation is divided through dispersion element 4, and the picture after light splitting is converged by converging lenses 5, by
It in detector focal plane imaging is image planes first area 11 to calibrate after mirror 6 is calibrated, and first area 11 is imaged by detector 7,
Corresponding data I；The picture of floor area 9 is collimated after telescopic system 2, three slits 1 by collimating mirror 3, the picture after collimation
It is divided through dispersion element 4, the picture after light splitting is converged by converging lenses 5, in detector focal plane imaging is picture after being calibrated by calibration mirror 6
Face second area 12, second area 12 are imaged by detector 7, corresponding data II；The picture of floor area 10 passes through telescope
Collimated after system 2, three slits 1 by collimating mirror 3, the picture after collimation is divided through dispersion element 4, and the picture after light splitting is by converging lenses
5 convergences, in detector focal plane imaging are the 3rd region 13 of image planes after being calibrated by calibration mirror 6, the 3rd region 13 by detector 7 into
Row imaging, corresponding data III.RX detection algorithms are used alone in data I, data II, data III by data calculation process such as Fig. 3,
It is (x that data I, which calculate the coordinates of targets that I rx of data obtained is included,1, y1), data II calculate the mesh that II rx of data obtained is included
Mark coordinate is (x2, y2), it is (x that data III, which calculate the coordinates of targets that III rx of data obtained is included,3, y3)；
Detection is associated to target in I rx of data, II rx of data, III rx of data of acquisition, obtains moving target data,
Non-athletic target is rejected, computational methods are：
(x1-x2)2+(x2-x3)2+(y1-y2)2+(y2-y3)2≥σ
Formula physical significance all detects target in the time range of same target for three slits and moves the flat of total displacement
Target of the side more than threshold value σ is required target, wherein,
(x1, y1) be target in I rx of data coordinate, (x2, y2) be target in II rx of data coordinate, (x3, y3) it is several
According to the coordinate of target in III rx；
σ is moving target judgment threshold, characterizes three slits and all detects what target in the time range of target was moved
Placement property, is determined by empirical value, can generally make σ=3000；
Moving target movement velocity is calculated, scanning direction is identical with positive direction of the x-axis, and y-axis direction can be set by different demands,
In the time range for detecting that target detects target to second slit from first slit, it is public to calculate velocity to moving target
Formula：
Wherein,
v1It is that first slit detects target and detect to calculate in the time range of same target to second slit and obtain
The movement velocity of the target taken；(x1, y1) be target in I rx of data coordinate, (x2, y2) be target in II rx of data coordinate；
vsensorWhen being detection system scanning imagery, speed of the detector in the projection of object height space pixel；dslitIt is three slits
(1) the distance between 3 slits；D is detector pixel dimension；
In the time range for detecting that target detects same target to the 3rd slit from second slit, movement is calculated
Target velocity formula：
Wherein,
v2It is that second slit detects target and detect to calculate in the time range of target to the 3rd slit and obtain
The movement velocity of target；(x2, y2) be target in II rx of data coordinate, (x3, y3) be target in III rx of data coordinate；
vsensorWhen being detection system scanning imagery, speed of the detector in the projection of object height space pixel；dslitIt is three slits
(1) the distance between 3 slits；D is detector pixel dimension；
The temporal resolution of system：
Wherein,
Δ t is system timing resolution；vsensorWhen being detection system scanning imagery, detector is in object height aerial image
The speed of the projection of member；dslitIt is the distance between 3 slits of three slits 1；F is system focal length；H is detection system distance
Object height；
The advantages of this patent is：Compared to conventional motion object detection method and device, the bloom designed using three slits
Spectrum imager has the temporal resolution of higher when detecting moving target, can be greatly improved with high spectrum image and complex background is transported
The detection probability of moving-target, while the speed of the image calculating moving target with different slits, adjustment slot distances can be adjusted
The delay of three pictures, solves the problems, such as that single band detection detectivity is low, EO-1 hyperion detection time resolution ratio is low；Compared to more
Hyperspectral imager splicing system need to use more spectrometers, and three slit hyperspectral imagers are realized with a hyperspectral imager
Single pass reduces system design difficulty, reduces volume, weight, reduce cost to 3 imagings of moving target.
Brief description of the drawings
, below will be to needed in the embodiment attached for the technical solution of clearer explanation this patent embodiment
Figure does simple introduction, it is therefore apparent that, can under the premise of not making the creative labor for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is three slit EO-1 hyperion moving target detection devices.
Fig. 2 is three slit arrangements, three slot arrangements.
Fig. 3 is three slit EO-1 hyperion moving target detection data computational methods.
Fig. 4 is high time resolution EO-1 hyperion moving target detection method and device case study on implementation.
Fig. 5 is case study on implementation Designing Transfer Function (3 mu m waveband).
Fig. 6 is case study on implementation Designing Transfer Function (4 mu m waveband).
Fig. 7 is case study on implementation Designing Transfer Function (5 mu m waveband).
Embodiment
With reference to the attached drawing in this patent embodiment, clear, complete description is carried out to technical solution, it is clear that retouched
The embodiment stated is only the part of the embodiment of this patent, instead of all the embodiments.Those of ordinary skill in the art exist
Do not make and obtain every other embodiment under the premise of creative work, belong to the protection domain of this patent.
This patent implement such as Fig. 4, Fig. 4 description for high time resolution complex background moving target detect EO-1 hyperion into
Detected in fact as instrument (using scanning imagery pattern) carries out complex background moving target EO-1 hyperion using the apparatus and method of this patent
Illustration is applied, telescopic system 1 is used for being imaged motion target area, and three slit elements 2 are used for telescopic system to that may deposit
Scan in target area through three slits into three pictures, three pictures while the area of corresponding region three, be scanned on system edge successively
During picture, if having target in track is scanned, the picture of target passes through three slits successively.The collimated mirror 3 of picture of three slits collimates
It is divided afterwards by dispersion beam splitter 4, the spectral signal after light splitting is converged through converging lenses 5, by detector 7 after the calibrated correction of mirror 6
It is imaged, completes the imaging three times to target area by single pass, the spectrum of target area can use spectrum algorithm to examine
The position of moving target is surveyed, different images can be used for calculating the motion vector of moving target.
Complex background moving target detects hyperspectral imager, and optical system bore is 0.06m, and system focal length is
0.125m, F number be 2, pixel dimension be 30 μm, with turntable rotate be directed toward mirror complete scanning imagery function, adjust the distance EO-1 hyperion into
As the alcolhol burner flame of instrument 40m is detected, the effect that alcolhol burner movement completes flame movement is held by people, turntable rotates
When, hyperspectral imager detector pixel is 2ms in the speed of the projection in distance objective 40m spaces-1, three of three slits are narrow
The distance between seam is 10mm, then temporal resolution is 1.6s.Hyperspectral imager design parameter such as table 1.
Table 1
Referring to attached drawing 4, Fig. 5, Fig. 6 be optical system described in embodiment 3 μm, 4 μm, 5 μm of modulation transfer function it is bent
Line, it can be seen that system MTF is more than 0.5, meets imaging requirements.
Claims (1)
1. a kind of three slit EO-1 hyperion moving target detection devices, including telescopic system (2), three slits (1), collimating mirror (3),
Dispersion beam splitter (4), converging lenses (5), corrective lens (eye protection) (6), detector (7), it is characterised in that：
3 slits of three slit (1) are equidistantly evenly distributed, including the first slit (1-1), the second slit (1-2), the 3rd
Slit (1-3) is used to making telescopic system (2) that same target (14) is swept direction and scanned successively as three pictures, three pictures by pushing away
It is divided after collimated mirror (3) collimation by dispersion beam splitter (4), the spectrum after light splitting is after converging lenses (5) convergence by corrective lens (eye protection)
(6) correct, be imaged by detector (7), obtained from the first area (11) of the corresponding detector (7) of the first slit (1-1)
The view data obtained is data I, the image obtained from the second area (12) of the corresponding detector (7) of the second slit (1-2)
Data are data II, and the view data obtained from the 3rd region (13) of the corresponding detector (7) of the 3rd slit (1-3) is number
According to III, detection identification is carried out to moving target with data I, data II, data III, calculates velocity to moving target.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664533A (en) * | 2017-08-30 | 2018-02-06 | 中国科学院上海技术物理研究所 | A kind of three slit EO-1 hyperion moving target detection methods and device |
| CN111623876A (en) * | 2020-07-01 | 2020-09-04 | 中国科学院上海技术物理研究所 | Push-broom hyperspectral imaging system and method based on S matrix slit array |
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2017
- 2017-08-30 CN CN201721095151.5U patent/CN207280592U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664533A (en) * | 2017-08-30 | 2018-02-06 | 中国科学院上海技术物理研究所 | A kind of three slit EO-1 hyperion moving target detection methods and device |
| CN107664533B (en) * | 2017-08-30 | 2023-09-12 | 中国科学院上海技术物理研究所 | Three-slit hyperspectral moving object detection method and device |
| CN111623876A (en) * | 2020-07-01 | 2020-09-04 | 中国科学院上海技术物理研究所 | Push-broom hyperspectral imaging system and method based on S matrix slit array |
| CN111623876B (en) * | 2020-07-01 | 2023-09-12 | 中国科学院上海技术物理研究所 | Push-broom hyperspectral imaging system and method based on S matrix slit array |
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