| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rainfall detection system that can detect a rainfall accurately.SOLUTION: A rainfall detection system A comprises a glass 1 and a piezoelectric sensor 2 fixed on one surface of the glass 1 for detecting a vibration of the glass 1 when a rainfall hits on the glass, and the piezoelectric sensor 2 preferably has a piezoelectric sheet 21, a signal electrode 22 integrally laminated on one surface of the piezoelectric sheet 21, and a first ground electrode 23 integrally laminated on the other surface of the piezoelectric sheet 21, thereby detecting the rainfall that has hit on the glass 1 accurately.</p> |
