光电式日照计室内检测系统中辐射抑制方法研究  

Research on Radiation Suppression Method in Indoor Detection System of Photoelectric Sunshine Recorder

作　　者：王雨畅 张国玉[1] 孙高飞[1] 刘石[1] 张健[1] 明杉炽 WANG Yuchang;ZHANG Guoyu;SUN Gaofei;LIU Shi;ZHANG Jian;MING Shanchi(School of Opto-electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《光子学报》2022年第6期133-143,共11页Acta Photonica Sinica

基　　金：吉林省科技发展计划(No.20200602055ZP)。

摘　　要：针对光电式日照计检测面临复现性差和误差大等困难,提出了一种可以减小校准误差的辐射抑制方法,并设计了日照计室内检测系统。介绍了直接辐射模拟系统和辐射环境模拟系统,研究了系统中使用的辐射抑制方法。根据辐射传输理论分析出口平面上的辐射分布,再依据光辐射在空间中传输的基本规律,引入辐射换热角系数推导了一定距离平面上的辐射通量公式。通过分析各个分系统的误差,检测辐射抑制方法的可行性。实验结果表明,使用本文的辐射抑制方法后,系统的直接辐射模拟精度提高了80%以上,绝对误差小于2 W/m^(2);散射辐射模拟精度提高了95%以上,绝对误差小于1 W/m^(2),满足日照计检测要求。Sunshine duration is an important observation for ground-based meteorological observations.The World Meteorological Organization defines it as"the sum of the periods of direct solar irradiance at or above 120 W/m^(2)".The instrument for measuring sunshine duration is the sunshine recorder,and nowadays,the mainstream sunshine recorder in the world is the photoelectric sunshine recorder.The primary calibration method is the outdoor calibration method.This method has significant shortcomings,such as being affected by different cloud conditions and sky scattered radiation value is not constant,which results in low calibration test accuracy and significant errors.The experimental results show that the threshold error range of outdoor calibration of the sunshine recorders is 9.3~10.3 W/m^(2),and the measurement results are difficult to achieve repeatedly[1].Hence,the study of indoor calibration systems that are not subject to environmental conditions is imminent.According to the measurement principle of the photoelectric sunshine recorder,the test system consists of 3 modules:direct radiation simulation system,radiation environment simulation system,and radiation suppression system.This paper focuses on the working principle of the radiation suppression system.The integrating sphere model was chosen as the initial model for the radiation suppression system.Because the distribution of radiation out of the integrating sphere is relatively uniform,even if a considerable amount of radiation returns to the radiation environment simulation system,the impact on the calibration test can be offset from each other.In this section,the calculation method of the radiation flux out of the integrating sphere is studied.Then the configuration of the radiation suppression system is analyzed according to the formula.According to the law of conservation of radiance and Taylors Series,the estimation formula for the flux at the exit port of the integrating sphere can be obtained.Before deriving the output radiation flux calculation,the eff

关 键 词：光电式日照计 室内检测 积分球 辐射抑制 日照时数 

分 类 号：TH765.22[机械工程—仪器科学与技术]