| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piezoelectric sensor having a simple structure, capable of eliminating an electric charge due to simultaneous change in temperature and vibration. <P>SOLUTION: The piezoelectric sensor comprises a first piezoelectric element (A) having flexibility and a second piezoelectric element (B) having substantially the same shape and substantially the same element capacity as of the first piezoelectric element (A) and flexibility, and has a temperature or vibration cancelling function. The first piezoelectric element (A) and the second piezoelectric element (B) are arranged, such that a positively charged surface of one piezoelectric element when heated and a negatively charged surface of the other piezoelectric element when heated are directed in the same direction. A front surface of the first piezoelectric element (A) and a back or front surface of the second piezoelectric element (B) are electrically connected to each other, and a back surface of the first piezoelectric element (A) and a front or back surface of the second piezoelectric element (B) are electrically connected to each other. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
