激光异物清理系统的光束发射系统设计

高压电网长距离传输线路经常飘落缠绕风筝塑料等异物需要及时清理,而人工异物清除方法存在较大安全隐患。激光具有发散角小、方向性高、高亮度的特点,是远距离非接触式电网异物清除的有效手段。为此在实验室搭建激光毁伤测试系统,测量典型电网异物清除阈值,依据测量结果设计了一种适用于户外使用的固定焦距光束发射系统,系统由3片分离式球面镜片组成,成像质量达到衍射极限,结构简单紧凑,长度仅有272 mm,重量小于48 g。根据设计结果,通过优化设计光源到透镜的距离,可实现系统在20~200 m工作距离调整。最终,采用物理光学传播功能模拟系统实际的使用情况,系统在发射基模高斯光束时,在各工作距离下光斑直径均小于9 mm,达到异物清除阈值,可实现对各类电网异物的有效清除。

Defect detection of solar cell based on data augmentation

High-voltage power lines are often wrapped in plastics and kites which need to be removed in time, however the existing manual removal methods exist potential safety hazard. Taking the advantage of small divergence angle, good directivity and high brightness of laser, foreign matter can be effectively and contactless cleaned up. The laser damage test system has been built to measure the damage threshold of typical foreign matters. According to the results of the experiment, a fixed focal length beam emission system has been designed, which consists of three separate spherical mirrors with simple and compact structure. The length of the system is 272 mm, and the weight is 48 g. The working distance of the system can be adjusted by changing the length between the laser source and lens. The system reaches the diffraction limit on the image quality. Base on the design, the system can remove foreign matters at distances from 20~200 m through optimizing the distance from the source to the lens. Simulation result shows that a fundamental Gaussian beam emitted by the system at difference distance has a target diameter less than 9 millimeters, ensuring the effectiveness of the system.