Space small fragment centroid distance estimation method and system based on laser reflection tomography

Abstract

The invention provides a space small fragment mass center distance detection system based on laser reflection tomography. The system comprises a transmitting unit, a receiving unit, a data acquisition unit and a data processing unit, the transmitting unit is composed of a solid laser, a laser beam expanding system and a laser attenuation piece. The receiving unit adopts a telescopic optical receiving system with the caliber D larger than or equal to 10 cm, the data acquisition unit adopts a laser pulse high-speed acquisition unit, multi-angle echo data are generated by acquired optical signals reflected by space debris and input into the industrial personal computer, real-time data processing is completed by processing software built in the industrial personal computer, and the data are transmitted to the display unit through the display unit. Built-in software of the industrial personal computer comprises a data preprocessing module, a space object mass center distance estimation module, a target image reconstruction module, an image processing module and a mass center distance calculation module. The industrial personal computer further comprises a laser monitoring control device used for controlling operation of the solid laser.

Description

technical field [0001] The technical field of laser detection of the present invention relates to a method and system for estimating the centroid distance of small space fragments based on laser reflection tomography. Background technique [0002] With the increasing frequency of space activities, the number of space debris is increasing day by day, which poses a serious threat to spacecraft in near-Earth space. Among them, centimeter-level space debris with a size of 1 to 10 cm has become the space debris that poses the greatest threat to spacecraft in orbit due to its large number, which is difficult to actively avoid and early warning, and the large size is difficult to implement passive protection. At present, an effective cleaning method for this kind of debris is high-power laser cleaning. The principle is to let the laser beam act on the center of mass of the debris, and the high-energy laser is irradiated on the center of mass of the debris, and the impulse coupling ...

AI Technical Summary

Problems solved by technology

[0006] For approximately planar debris targets, the above method can accurately determine the centroid distance, but for complex-shaped debris targets, due to the influence of the occlusion effect, there are shadow areas that cannot be illuminated at certain angles, and it is difficult to rely solely on multi-angle laser echo data. Accurate solution to get the centroid distance

The schematic diagram of the occlusion effect is shown in figure 2 As shown, there is a shadow area that cannot be irradiated by the laser beam irradiation angle φ. The laser echo data at this angle is only modulated by the target surface in the black marked area, and the target surface information in the red marked area is missing. It is difficult to accurately solve the echo at this angle. get centroid distance

Images