Accession Number : AD0250892

Title :   PRELIMINARY STUDY OF TWO PRINCIPLES FOR PRECISE PRESSURE INDICATION

Descriptive Note : Final rept.

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ELECTRONIC SYSTEMS LAB

Personal Author(s) : RASCHE, ROBERT W.

Report Date : SEP 1960

Pagination or Media Count : 1

Abstract : The problem of improved pressure measurement for depth sensing and other Naval applications is studied. A preliminary study was conducted of two techniques for precise pressure indication. Both techniques are characterized by measurement of a basic pressure-sensitive property, viz., the variation of the velocity of sound in liquid and the variation of dielectric constant of certain liquid dielectrics with pressure. Sea water pressure is transmitted to a suitable pressure-sensitive liquid and a velocity of sound or capacitance measurement made. Two methods of measuring the velocity of sound are analyzed for utilization as dynamic pressure indicators. Problems of capacitance measurement are discussed and the further investigation necessary for their solution is indicated. The objectives of an experimental program required to facilitate sensor development are outlined. Preliminary analysis indicates that both techniques presented herein potentially offer improvement over existing techniques of pressure sensing and further investigation is recommended. (Author)

Descriptors :   *DEPTH INDICATORS, *DIELECTRIC PROPERTIES, *PRESSURE GAGES, *UNDERWATER ROCKETS, LIQUIDS, MEASUREMENT, SEA WATER, SOUND.

Distribution Statement : APPROVED FOR PUBLIC RELEASE