Vibration sensor

Details Vibration sensor Vibration sensor

1987-01-30

1988-06-21

Myracle, Jerry W.

Measuring and testing

Vibration

Sensing apparatus

73660, G01M 700

Patent

active

047518480

ABSTRACT:
A vibration sensor for detecting vibration of an object at a prescribed frequency includes a vibratory body capable of resonating at the prescribed frequency and having at least one center of resonant vibration thereof. The vibratory body is made of an electrically conductive elastic material with its conductivity variable according to a strain thereof produced by the resonant vibration, and at least two electrodes disposed around the center of resonant vibration and joined to the vibratory body. The vibration sensor further includes a power supply connected to one of the electrodes, and an actuator having two input terminals and operable when the vibration of the object at the prescribed frequency is detected. One of the input terminals is connected to the other electrode and the other input terminal to the power supply. An electric signal can be produced directly from the vibration sensor via the electrodes. A control circuit or an actuator can be operated by the electric signal at the vibration frequency without using any filter circuit.

REFERENCES:
patent: 4494409 (1985-01-01), Kondo et al.

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