光电式日照计定标系统与校准方法研究

针对目前光电式日照计定标效率低,受天气影响严重,基于太阳模拟、积分球匀光、吸光陷阱以及多维调整等技术,提出了一种光电式日照计室内定标新方法并设计了光电式日照计定标系统。首先根据光电式日照计的组成与工作原理,提出了光电式日照计定标系统的总体设计方案;其次分析研究了直接辐射模拟系统、散射辐射模拟系统以及日地位置调节系统的主要技术指标;然后根据定标系统各组成部分之间的关联性,建立定标系统的校准链,研究了校准链各组成部分的校准方法,实现了定标结果的可溯源性;最后通过实验验证了光电式日照计定标系统的日照时数模拟误差。实验结果表明,光电式日照计定标系统4 h内的日照时数模拟误差为3.75%,满足现行的光电式日照计定标需求。

Research on the calibration system and calibration method of photoelectric sunshine duration recorder

Aiming at current situation of low efficiency and being affected seriously by the weather in photoelectric sunshine duration recorder calibration process, based on the technology of solar simulation, integrating sphere brightness smoothing, light absorption trap and multidimensional adjustment, a new indoor calibration method for photoelectric sunshine duration recorder is proposed and a photoelectric sunshine duration recorder calibration system is designed. Firstly, according to the composition and operating principle of photoelectric sunshine duration recorder, the overall design scheme of the photoelectric sunshine duration recorder calibration system is put forward. Secondly, the main technical specifications of direct radiation simulation system, scattered radiation simulation system and solar terrestrial relationship regulating system are studied and analyzed. Then, according to the correlation among the components of the calibration system, the calibration chain of the calibration system is established, and the calibration methods of the components of the calibration chain are studied, and the traceability of the calibration result is realized. Finally, the simulation error of the sunshine hours of the photoelectric sunshine duration recorder calibration system is verified with experiments. The experiment results show that the simulation error of the sunshine hours of the photoelectric sunshine duration recorder calibration system is 3.75% within 4 hours, which satisfies the calibration requirements of current photoelectric sunshine duration recorder.