聚光器吸热管表面辐射能流密度的检测方法  

Detection Method for Radiant Energy Flow Density on Condenser Heat-Absorbing Tube Surface

作　　者：李建昌 王成龙[1] 王森 孙婷婷 Li Jianchang;Wang Chenglong;Wang Sen;Sun Tingting(National Engineering Research Center for Technology and Equipment Technology of Environmental Deposition,Lanzhou Jiaotong University,Lanzhou,Gansu 730070,China;Key Laboratory of Opto-Technology and Intelligent Control,Ministry of Education,Lanzhou Jiaotong University,Lanzhou,Gansu 730070,China)

机构地区：[1]兰州交通大学国家绿色镀膜技术与装备工程技术研究中心,甘肃兰州730070 [2]兰州交通大学光电技术与智能控制教育部重点实验室,甘肃兰州730070

出　　处：《激光与光电子学进展》2020年第19期213-219,共7页Laser & Optoelectronics Progress

基　　金：国家重点基础研究发展计划(2012CB626800);兰州交通大学优秀科研团队资助项目(201703)。

摘　　要：提出一种基于CCD相机和双朗伯靶的能流均匀性测量系统和方法。系统有两块朗伯靶,其中一块是固定的水冷朗伯靶,靶中心开孔处装有一个用来获得区域灰度值的热流探测器,另一块是可移动朗伯靶,用于拍摄没有探测器的光斑图像。所提方法可以直接获得探测器区域的像素灰度值,使得测量过程简单精确。详细阐述了测量原理和聚焦光斑灰度图像能流密度分布提取的整个过程,并搭建了平台,测量了多块小型定日镜的光斑能流分布,验证了所提方法的正确性和可行性。通过重复性实验和误差分析,结果表明,所提方法检测的峰值能流密度误差小于2.4%,所提方法可用于线性菲涅耳聚光系统二次聚光器开口平面处吸热管表面的能流分布检测。This paper presents an energy flow uniformity measurement system and method based on CCD camera and dual Lambertian target.The system has two Lambertian targets,one of which is fixed and water-cooled.An heat flow detector at the center opening of the target is used to obtain the regional gray value.The other is a movable Lambertian target,which is used to capture spot images without a detector.The proposed method can directly obtain the pixel gray value of the detector area,making the measurement process simple and accurate.In this paper,the measurement principle and the entire process of extracting the energy flow density distribution of the gray images of the focus spot are described in detail.The platform is built and the spot energy flow distribution of multiple small heliostats is measured,verifying the correctness and feasibility of the proposed method.It can be seen from repeatable experiments and error analysis that the peak energy flow density error detected using the proposed method is less than 2.4%.The proposed method can be used for the energy flow distribution detection on the surface of the heat-absorbing tube at the opening plane of the secondary condenser in a linear Fresnel concentrator system.

关 键 词：非线性光学 能流密度 光热耦合性 CCD相机 像素灰度值 光斑灰度图像 

分 类 号：TK514[动力工程及工程热物理—热能工程]