Title :
Low-frequency electrostrictive ceramic plate voltage sensor
Author :
Mermelstein, M.D. ; Vohra, S.T.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
A stress-driven electrostrictive ceramic is used for the first time to demonstrate a DC and low frequency voltage sensor. The device uses a Ba:PZT ceramic plate as the sensor element and exhibits a sensitivity of 0.68 mV/V and a minimum detectable voltage of 1.4 mV/ square root (Hz) below 10 Hz. A susceptibility for the coupled polarisation and strain modes is developed and used to quantitatively characterise the sensor operation. Design parameters are suggested for improving the device performance by several orders of magnitude.
Keywords :
electric sensing devices; electrostriction; piezoelectric transducers; voltage measurement; 10 Hz; DC sensor; PZT:Ba; PbZrO3TiO3:Ba; coupled polarisation; electrostrictive ceramic plate; low frequency; strain modes; stress-driven ceramic; voltage sensor;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921235
