A point target search and detection device based on multi-line time-difference scanning extended sampling

A detection device and scanning expansion technology, applied in the field of moving target search detection devices, can solve the problems of difficulty in detecting weak and small targets, long single scanning time, elimination of unfavorable backgrounds, etc., and achieve two-dimensional expansion, easy implementation, and mature technology. Effect

Active Publication Date: 2017-04-19
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current linear array imaging device, a single-line array detector is used, and the single scan time is long (usually ≥ 5s), and the background changes greatly between two scans, which is not conducive to background elimination. It is difficult to detect weak targets

Method used

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  • A point target search and detection device based on multi-line time-difference scanning extended sampling
  • A point target search and detection device based on multi-line time-difference scanning extended sampling
  • A point target search and detection device based on multi-line time-difference scanning extended sampling

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Embodiment 1

[0021] Embodiment 1—Front-end scanning, multi-line time-difference scanning extended sampling detector

[0022] Such as figure 1 As shown, a point target search and detection device based on multi-line time-difference scanning extended sampling, the detection device works on a satellite platform, including an optical system 1, a scanning mechanism 2 and a multi-line column detector 3; the scanning mechanism It includes a swing mirror and its driving device; the scanning mechanism is located at the front end of the optical system, and the size of the swing mirror should be larger than the aperture of the optical system; the multi-line detector is a double-line detector such as image 3 7, 8 as shown in, or including N d line detectors, such as Figure 4 The numbers 11, 12, and 13 shown, each line detector is arranged in parallel, and the distance between two adjacent line detectors is d i , where i=1,2,…,N d -1,N d >2; Any two linear detectors can detect motion speed great...

Embodiment 2

[0025]Embodiment 2—Back-end scanning, multi-line time-difference scanning extended sampling detector

[0026] Such as figure 2 As shown, a point target search and detection device based on multi-line time-difference scanning extended sampling, the detection device works on a satellite platform, including an optical system 1, a scanning mechanism 2 and a multi-line column detector 3; the scanning mechanism 2 includes a swing mirror and its driving device; the scanning mechanism 2 is located at the rear end of the optical system 1; the linear detector is a double linear detector such as image 3 Labels 7 and 8 shown in ; two linear detectors can detect motion speed greater than v T goals, among which The scanning angular velocity ω of the scanning mechanism 2, the distance d between two linear detectors, the focal length f of the optical system, and the ground sampling distance GSD of the linear detectors. The dual line detector consists of image 3 shown.

[0027] In thi...

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PUM

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Abstract

A point target searching detection device based on multi-linear time lag extension sampling adopts the structure that an imaging device works on a satellite platform and comprises an optical system, a scanning mechanism and a multi-linear detector; the scanning mechanism comprises a swinging mirror and a driving device of the swinging mirror; the multi-linear detector comprises Nd linear detectors which are parallelly arranged, and the distance between every two adjacent linear detectors is di; any two linear detectors can detect targets of which the movement speed is higher than vT; incident beam including both target and background radiation energy information is gathered to a focal plane by the optical system after being reflected by the swinging mirror to form scenery images; the driving device drives the swinging mirror to rotate at the angular rate of omega, so that the scenery images are sequentially swept by the linear detectors according to a certain sequence, and the scenery images are sampled by the linear detectors; when all the scenery images pass through the linear detectors, a complete image is formed.

Description

technical field [0001] The invention relates to a moving target search and detection device, which can be used as a space-based detection system for air / space moving targets. Background technique [0002] The key to the moving target search and detection device based on multi-line time-difference scanning is to form multiple images with a certain time interval. Using the characteristics that the background does not move in a short time and the target moves relative to the background, the background is filtered out by subtracting the time-difference images. , to achieve target detection. In the current linear array imaging device, a single-line array detector is used, and the single scan time is long (usually ≥ 5s), and the background changes greatly between two scans, which is not conducive to background elimination. It is difficult to detect weak targets. Contents of the invention [0003] The technical problem of the present invention is to overcome the deficiencies of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/232H04N5/335H04N5/341
Inventor 王虎妹王世涛董小萌孙晓峰宋鹏飞刘晓磊
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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