Fused silica diaphragm module for high temperature pressure tran

Details Fused silica diaphragm module for high temperature pressure tran Fused silica diaphragm module for high temperature pressure tran

1984-03-30

1986-05-20

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73705, 92103R, G01L 708

Patent

active

045892865

ABSTRACT:
A high temperature pressure transducer and sensing apparatus to determine the deflection of the transducer diaphragm is disclosed. The pressure transducer utilizes a fused silica diaphragm (12) which is illuminated at selected locations by a coherent laser source (52) via optical fibers (38, 46). The light reflected by the diaphragm (12) forms interference fringe patterns which are focused by gradient index rod lenses (36) on the ends of optical fibers (40, 48) for transmission to a fringe counting circuit (54). By digital techniques, the fringe count is converted into a determination of diaphragm deflection.

REFERENCES:
patent: Re29867 (1978-12-01), Stedman
patent: 3040583 (1962-06-01), Post
patent: 3503116 (1970-03-01), Strack
patent: 3590640 (1971-07-01), Cindrick

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