Laser radar for long-distance object detection

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...

AI Technical Summary

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 use a large field of view and high frame rate detection equipment for identification and tracking, and it is difficult for traditional scanning lidar to meet this requirement.

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