| 摘要 |
<p>Disclosed herein is an acceleration sensor (41) having a sensor body (42) obtained by forming first and second signal electrodes (45, 46) on outer major surfaces of first and second piezoelectric ceramic plates (43, 44) which are pasted to each other through an intermediate electrode (47). The sensor body (42) is formed to be mechanically supported in the form of a center beam, and has such first to third regions that stress is caused in different directions in adjacent ones of the regions upon action of acceleration, while the first and second piezoelectric ceramic plates (43, 44) are polarized in opposite directions in the second region, so that charges which are opposite in polarity to those generated in the second region are not drawn from the signal electrodes (45, 46) in the first and third regions.</p> |
