| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an object detection sensor and a spray device without requiring setting or adjusting of a received light quantity between light receiving elements. <P>SOLUTION: An object detection sensor includes: a light receiving element 200a of which received light quantity varies by approach of a person P and which outputs a voltage signal α according to the variation of the received light quantity; a light receiving element 200b which is arranged toward a direction different from that of the light receiving element 200a, of which received light quantity varies by variation of ambient light, and which outputs a voltage signal β according to the variation of the received light quantity; and a control section 400 which determines whether or not the voltage signal β of the light receiving element 200b is equal to or less than a threshold value, and as the result of the determination, when it is determined that the voltage signal β is equal to or less than the threshold value, detects approach of the person P based on the voltage signal α. <P>COPYRIGHT: (C)2012,JPO&INPIT |
