| 摘要 |
PURPOSE: A vibration sensor is provided to accurately sense vibration regardless of the installation direction of a vibration sensor and the direction of the shock applied to the vibration sensor. CONSTITUTION: A case(100) has a space. A first piezoelectric element(101) is installed in the case. A second piezoelectric element is installed in the case facing the first piezoelectric element. A connecting wire(102) connects the central region of the first piezoelectric element with the central region of the second piezoelectric element. A mass body(103) is fixed in the central region of the connecting wire. An amplifying unit(105) amplifies the currents generated from the first piezoelectric element and the second piezoelectric element.
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