光学 精密工程, 2017, 25 (6): 1418, 网络出版: 2017-07-10
电致发光缺陷检测仪的成像性能评估
Evaluation of imaging performance for electroluminescence defect detector
摘要
针对电致发光缺陷检测仪的成像性能不一致的现状, 结合光伏组件自身的电致发光原理, 对分辨率、图像均匀性、图像显示等技术指标进行了分析和比较, 提出了一种适用于光伏组件生产线现场快速有效的检测技术。研制了相应的检测评估装置, 开展了相关测试试验。实验结果表明, 利用该技术对粘贴在组件上的分辨率测试板的图像进行视觉判读, 可实现1.98 lp/mm(线对每毫米)的最高分辨率检测以及0.1 mm线宽的最小单条纹缺陷模拟检测, 从而保证光伏组件的缺陷检测工作能够更加准确有效, 促进光伏产业的质量提升。经测试, 该评估技术适用于光伏组件生产线上的电致发光缺陷检测仪, 可满足目前光伏产业的检测需求。
Abstract
Technical indexes such as resolution, image uniformity, and image display were analyzed and compared, aiming at the inconsistency of current imaging performance of electroluminescent (EL) defect detector in combination with electroluminescent principles of Photovoltaic (PV) modules. A rapid and effective on-line detection technique for PV modules was proposed. Corresponding detection and assessment devices were developed, and related test experiments were implemented. The experiment results show that for a visual judgment of images on test board of resolution ratio pasted in modules, the technique can realize a detection with the highest resolution of 1.98 lp/mm and a simulative detection of minimum single stripe flaw with line width of 0.1 mm, thus guaranteeing more accurate and effective defect detection for PV modules and promoting production quality of PV industry. The assessment technique is feasible to EL defect detector in production line of PV modules and can satisfy current detection demands of photovoltaic industry.
林剑春, 杨爱军, 沈熠辉. 电致发光缺陷检测仪的成像性能评估[J]. 光学 精密工程, 2017, 25(6): 1418. LIN Jian-chun, YANG Ai-jun, SHEN Yi-hui. Evaluation of imaging performance for electroluminescence defect detector[J]. Optics and Precision Engineering, 2017, 25(6): 1418.