Low-frequency electrostrictive ceramic plate voltage sensor

Details Low-frequency electrostrictive ceramic plate voltage sensor Low-frequency electrostrictive ceramic plate voltage sensor

1993-09-02

1995-04-04

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310318, 310338, 310369, H01L 4108

Patent

active

054040647

ABSTRACT:
A stress-driven electrostrictive ceramic low-voltage plate voltage sensor based on the principle of the field-coupling between the strain and polarization in the ceramic material of the device. Application of a dithering or driving voltage to a piezoelectric tube thereby generating an oscillating polarization whose amplitude is proportional to an applied low-frequency voltage. A electrostrictive ceramic wafer material affixed to the piezoelectric tube senses this oscillation and generates a displacement current. The displacement current represents a voltage output that is an amplitude modulated carrier whose displaced amplitude is proportional to an applied unknown signal voltage sought to be determined.

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patent: 5243661 (1993-09-01), Ohkubo et al.
Mermelstein et al., "Low-Frequency Electrostrictive Ceramic Plate Voltage nsor", Elec. Ltrs., vol. 28, No. 20, pp. 1930-1931, Sep. 92.
Mermelstein, "A Magnetoelastic Metallic Glass Low-Frequency Magnetometer", IEEE Trans. Mag., vol. 28, No. 1, pp. 36-56, Jan. 1992.
Vohra et al., "Fiber-Optic dc and Low-Frequency Electric-Field Sensor", Op. Ltrs., vol. 16, No. 118, pp. 1445-1447, Sep. 1991.

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