3D shape reconstruction of parabolic trough collector from gradient data based on slope stitching approach  

作　　者：侯银龙 李林 王姗姗 朱秋东 

机构地区：[1]School of Optoelectronics, Beijing institute of Technology, Beijing 100081, China,

出　　处：《Chinese Optics Letters》2017年第11期50-55,共6页中国光学快报（英文版）

基　　金：supported by the National “973” Program of China(No.2013CB733100);the National Natural Science Foundation of China(No.61008033)

摘　　要：A method based on slope stitching for measurement of a large off-axis parabolic trough collector is proposed and applied to the surface shape reconstructed from the gradient data acquired by using the reverse Hartmann test.The entire reflector is divided into three sections with overlapping zones along the concentration direction.A mathematical model for the slope stitching algorithm is developed.An improved reconstruction method combining Zernike slope polynomials iterative fitting with the Southwell integration algorithm is utilized to recover the real three-dimensional（3 D） shape of the collector.The efficiency and validity of the improved reconstruction method and the stitching algorithm are experimentally verified.A method based on slope stitching for measurement of a large off-axis parabolic trough collector is proposed and applied to the surface shape reconstructed from the gradient data acquired by using the reverse Hartmann test.The entire reflector is divided into three sections with overlapping zones along the concentration direction.A mathematical model for the slope stitching algorithm is developed.An improved reconstruction method combining Zernike slope polynomials iterative fitting with the Southwell integration algorithm is utilized to recover the real three-dimensional（3 D） shape of the collector.The efficiency and validity of the improved reconstruction method and the stitching algorithm are experimentally verified.

关 键 词：TROUGH COLLECTOR PARABOLIC ZERNIKE OVERLAPPING reconstructed fitting iterative reflector utilized 

分 类 号：TK513.1[动力工程及工程热物理—热能工程]