Accession Number:

ADD020179

Title:

An Improved System and Apparatus for Measuring Displacements in Electro-Active Materials

Descriptive Note:

Patent application, Filed 5 Aug 2004

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI

Report Date:

2004-08-05

Pagination or Media Count:

18.0

Abstract:

A specialized containment cell with optically transparent apertures, in conjunction with a laser interferometer system provides the means for non-contact displacement measurements of electro-active piezoelectric and electrostrictive materials to be performed under controlled conditions of pressure, temperature and applied voltage. A sample of electro-active material is placed inside the cell. Electrical connections are made from a high voltage power source to the sample through the cell. Thermoelectric heaterscoolers and a cooling water heat sink built into the cell control the temperature of the sample. The cell is flooded with a dielectric oil pressurizing the interior of the cell to a desired pressure. The cell is optically aligned to the interferometer, and with the cell heated to the proper temperature, a voltage is applied to the sample as the interferometer measures the displacement of the sample.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Electricity and Magnetism
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE