The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 1995
Filed:
Sep. 02, 1993
Marc D Mermelstein, Chevy Chase, MD (US);
Sandeep T Vohra, Crofton, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
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.