Low-frequency electrostrictive ceramic plate voltage sensor
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United States of America Patent
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Apr 4, 1995
Grant Date -
N/A
app pub date -
Sep 2, 1993
filing date -
Sep 2, 1993
priority date (Note) -
Expired
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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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