Abstract
In this paper, an optical calibration instrument is proposed for mass production of irradiation angle sensors. A Lambert-based current compensation principle with nonlinear parameter identification tools are given to improve the precision of sensor-specific characteristic functions through eliminating the adversary effects of indoor light attenuation and manufacturing defects. The newly designed instrument, endowed with the proposed tools, is a smart device that is automatic, fast, efficient, and accurate. Outdoor experimental results show that the instrument calibrates the sensor in a good accuracy up to 0.23° at the presence of 16° manufacture errors of inclines. Therefore, the instrument is promising in mass production in terms of intelligent manufacture process.
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