Aiming at the problem of large measurement error and long calibration period for photoelectric sunshine, the shielding coefficient of total radiation and scattering radiation is deduced by establishing the relationship between total radiation, scattered radiation and solar irradiance position and corresponding photoelectric conversion mathematical model. The corresponding photoelectric sensor and the design of its photoelectric conversion circuit to solve the sunshine mea-surement results are unstable, calibration process adjustment difficult and long cycle, subjective factors such as large technical problems. A new method of error compensation based on time and latitude and longitude and measured results is proposed by analyzing and testing a large number of measurement results. The cumulative measurement error of the existing photoelectric sunshine month is increased from 11.06% to 2.21%,the calibration period is reduced from 20 days to 5 days,and the influence of the subjective error of the debugging personnel is eliminated,and the large-scale pro-duction can be realized,with a wide range of practicality.%针对光电日照计累积测量误差大、标定周期长的问题,通过建立日照计总辐射、散射辐射与太阳辐照度位置关系及相应光电转换数学模型,推导出总辐射和散射辐射理论遮蔽系数,选取了相应的光电传感器并设计了光电转换电路,解决了日照计测量结果不稳定,标定过程调节困难且周期长、主观因素影响大等技术难题.进行了实验与测试,通过对大量测量结果分析,提出了一种基于时间和经纬度及实测结果进行修正的误差补偿新方法.实现了将现有光电式日照计月累计测量误差由原来11.06%提高到了2.21%,标定周期由20天以上缩短为5天以内,并消除了调试人员主观误差的影响,使大规模生产得以实现,具有广泛的实用性.
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