Refractive optical fluid pressure sensor

Details Refractive optical fluid pressure sensor Refractive optical fluid pressure sensor

1984-06-27

1985-12-03

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Photoelectric

250231P, G01L 700

Patent

active

045559503

ABSTRACT:
The refractive optical pressure sensor of this invention is a system for measuring the pressure of a liquid comprising a light source, a light detector and a capillary formed in a transparent solid. A refractive surface of the capillary is positioned in the light path of light from the light source. A light detector is positioned in the path of light originating from the light source which has been refracted by the refractive surface of the capillary filled with air but outside of the path of light which has been refracted by the refractive surface of the capillary filled with liquid. The inlet end of the capillary is open for communication with liquid to be monitored for pressure, and the other end of the capillary is closed or communicates with a closed reservoir. Small changes in liquid pressure change the amount of liquid in the capillary passageways, causing an easily detected change in sharply refracted light.

REFERENCES:
patent: 1811946 (1931-06-01), Le Bailly

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