Accession Number : ADD011126

Title :   Pressure Sensor and Soil Stress Isolation Filter Arrangement in a Pore Pressure Probe.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Sidey,R

Report Date : 12 Jun 1984

Pagination or Media Count : 9

Abstract : A system for measuring transient pore water pressure in the ground utilizes a probe member having a unique arrangement of a pressure sensor and a soil stress isolation filter. The probe member has a body portion with a hollow cavity define therein. The pressure sensor in the form a ceramic transducer is mounted in the cavity, and the filter in the form of a circumferential gap formed on the body communicate with the cavity. The filter is also configured for isolating the sensor from effective soil fabric stresses while allowing access to the transducer by pore water pressure. A coupling medium in the form of silicon grease fills the cavity so as to transmit the pore water pressure to the transducer. (Author)

Descriptors :   *Patents, *Pore pressure, Soils, Water, Interstitial, Dynamic pressure, Measuring instruments, Stresses, Isolation, Water filters, Piezoelectric gages

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE