| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an illuminance sensor and a lighting control system using it where, even if a noise continues several seconds at a light-reception level, the effect of the noise is eliminated and an accurate measurement illuminance is calculated. SOLUTION: Each time a light-reception level of an intermediate value is extracted from a plurality of sampled light-reception levels, a change amount between the extracted light-reception level and a previous one is calculated. It is judged whether the change amount is within a tolerable range of a reference level.</p> |
