光电式日照计测量误差不确定性仿真分析  

Simulation analysis of measurement error uncertainty of photoelectric insolation meter

作　　者：郑慧程 王凌云[1] 李光茜 张玮彤 庞成伟 Zheng Huicheng;Wang Lingyun;Li Guangxi;Zhang Weitong;Pang Chengwei(School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;College of Electronic and Information Engineering,Changchun University,Changchun 130022,China)

机构地区：[1]长春理工大学光电工程学院,长春130022 [2]长春大学电子信息工程学院,长春130022

出　　处：《仪器仪表学报》2024年第11期187-196,共10页Chinese Journal of Scientific Instrument

基　　金：吉林省科技发展计划重点研发项目(20220201089GX)资助。

摘　　要：光电式日照计在晴天和多云等天气状况下测量散射辐射时因受其遮光设计的影响,结果可能会出现较大误差。为减小其测量误差,通过TracePro仿真分析四、六、八分遮光方案在不同天气下的反射直射辐射误差以及散射分布误差,得出尽管六分和八分遮光方案能更好细分探测天穹,但其遮光孔数量的增加会致使散射分布误差的修正难度增大。故本文针对四分遮光方案建立了散射分布误差修正模型,并通过模拟及实测验证了其有效性。修正后,总辐射传感器接收的散射辐射与散射传感器测量的辐射相关性显著提高,Pearson相关系数均在0.95以上,平均相对误差降低至4%以下。在实际测试中,光电式日照计的月累计误差由12.25%减少到了2.66%,测量精度得到了大幅提升。Photoelectric insolation meter may have large errors when measuring scattered radiation under sunny and cloudy weather conditions due to their shading design.In order to reduce the measurement error,the reflection direct radiation error and diffuse distribution error of the four-,six-,and eight-divided shading scheme under different weather conditions are analyzed by TracePro simulation,and it is concluded that although the six-and eight-divided shading scheme can detect the dome of the sky in a better way,the increase in the number of the shading holes will result in the difficulty of correcting the diffuse distribution error.Therefore,this paper establishes a diffuse distribution error correction model for the four-divided shading scheme,and verifies its validity through simulation and actual measurement.After the correction,the correlation between the scattered radiation received by the total radiation sensor and the radiation measured by the scattering sensor is significantly improved,with the Pearson correlation coefficients above 0.95,and the average relative error reduced to below 4%.In the actual test,the monthly cumulative error of the photoelectric heliometer was reduced from 12.25%to 2.66%,and the measurement accuracy was greatly improved.Photoelectric insolation meter may experience significant errors when measuring scattered radiation under sunny and cloudy weather conditions due to their shading design.To reduce the measurement errors,the reflection direct radiation error and diffuse distribution error of the four-,six-,and eight-divided shading schemes under different weather conditions are analyzed using TracePro simulation.The analysis concludes that although the six-and eight-divided shading scheme can capture the dome of the sky more effectively,increasing the number of the shading holes makes it more difficult to correct the diffuse distribution error.Consequently,this paper establishes a diffuse distribution error correction model for the four-divided shading scheme and verifies its validity

关 键 词：光电式日照计 遮光方案 反射直接辐射误差 散射分布误差 修正模型 

分 类 号：TH765.22[机械工程—仪器科学与技术]