| 摘要 |
PROBLEM TO BE SOLVED: To provide a sun tracking type sensor capable of shielding direct sunlight very precisely. SOLUTION: A first illuminometer 4a is mounted on sun tracking equipment to track the trajectory of the sun, and the acceptance angle of the first illuminometer 4a is made to be a narrow angle required for receiving the direct sunlight. A second illuminometer 4b is set so as to be incapable of receiving the direct sunlight, and the comparison value between an illuminance detected by the first illuminometer 4a and an illuminance detected by the second illuminometer 4b is computed and outputted by an operation part 10. COPYRIGHT: (C)2005,JPO&NCIPI
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