| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shock sensor capable of detecting shocks in any directions, while having monolithic in structure. <P>SOLUTION: In the piezoelectric shock sensor that uses a ring-shaped piezoelectric ceramic trunk body with outer and inner shapes of square cross section: the sensor is equipped with independent signal detecting electrodes on each of four external surfaces of the trunk body and is also equipped with a common electrode on an internal surface of the trunk body; the piezoelectric ceramic trunk is polarized in the thickness direction; two sets of signal detecting circuit are composed from two facing signal detecting electrodes pair; and then displacement in the two directions generated by shock is detected from the two sets of signal detection circuit. Moreover, similar constitution is also possible, even when use of cylindrical ring-shaped piezoelectric ceramic trunk is used. <P>COPYRIGHT: (C)2007,JPO&INPIT |
