Laser radar for long-distance object detection

A technology of laser radar and target detection, which is applied in the direction of measurement device, utilization of re-radiation, and re-radiation of electromagnetic waves, etc., to achieve the effect of improving the probability of capture, reducing the size, and protecting the safety of operation.

Active Publication Date: 2016-04-13
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

However, due to the randomness of the movement direction of the debris, it may have a large tangential velocity. In order to avoid and catalog the debris, it is necessary to

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  • Laser radar for long-distance object detection
  • Laser radar for long-distance object detection
  • Laser radar for long-distance object detection

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[0029] The invention provides a laser radar system of a composite visible light camera with scanning emission and area array reception. The target is accurately positioned by the visible light camera, the receiving optical system is rotated to make the target located in the center of the field of view, and the target is scanned with a strong laser in a small field of view. Obtain high-precision distance information of the target.

[0030] Because the size of the small fragments is very small, the reflection cross-section is very small. Although the laser directivity is very good, the cross-sectional area of ​​the beam at 10 kilometers away is much larger than the size of the small fragments, resulting in low reflection efficiency of the small fragments. In addition, the diffuse reflection of the debris surface material, the spin of the debris, and the efficiency of the receiving optical system all reduce the energy after the laser reflection, resulting in a further reduction in th...

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Abstract

The invention relates to a laser radar for long-distance object detection. The laser radar comprises a laser and visible light detection system, a laser emitter and a processor. The laser and visible light detection system comprises a main system lens, a splitter, a visible light optical detection system and a laser detection system; laser and visible light reflected by the surface of an object is collected by the main system lens, and split by the splitter; laser is input to the laser detection system then, and the laser detection system sends time when the laser reaches the laser detection system to the processor; the visible light is input to the visible light optical detection system, and the visible light optical detection system sends image information to the processor; the processor calculates the distance of the object according to the laser arrival time received from the laser detection system; and the image information from the visible light optical detection system is received, and direction information of the object is calculated. According to the invention, optical systems of a visible light camera and a laser radar reception optical system are combined in use, the size of an active and passive combined detection reception optical system is reduced, and the weight of the system is also reduced.

Description

Technical field [0001] The invention relates to a laser radar, in particular to a laser radar for long-distance target detection. Background technique [0002] With the increasing frequency of human space activities, the number of spacecraft and space debris in orbit has gradually increased. While people share the convenience brought by the space age, the space surrounding the earth (especially low orbit, polar orbit and geosynchronous orbit) is becoming more and more crowded. As of August 7, 2013, the number of wastes in orbit cataloged by SSN has reached 16,801. The uncatalogable micro-waste weighs several thousand tons, and the amount exceeds 20 billion, which can cause different degrees of damage and even functional failure of spacecraft. [0003] However, due to the limited detection capabilities of the ground-based space target detection system, it can only detect debris above 10 cm in the LEO orbit and debris above 30 cm in the GEO orbit. However, if the debris of 1-10 cm...

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Application Information

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IPC IPC(8): G01S17/66G01S17/42
CPCG01S17/42G01S17/66
Inventor 韩旭李志尹建凤林亲
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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