Optical sensor, especially pressure sensor, and corresponding op

Details Optical sensor, especially pressure sensor, and corresponding op Optical sensor, especially pressure sensor, and corresponding op

1992-03-06

1994-12-13

Raevis, Robert

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73705, G01N 300

Patent

active

053720440

ABSTRACT:
The optical sensor includes a support (2), an optical fiber (15) and two elements (9, 10) mounted on the support (2) in such a manner as to move as a function of the variations of a quantity to be measured, such as pressure. The attenuation of an optical radiation in the optical fiber (15) deformed by reverse bending is measured. The support (2) is constructed in the form of a bending beam including two end parts (2b, 2c) bearing on two fixed abutments and a central part (2a) connected to a metal membrane (16) actuated as a function of the variations of the quantity to be measured. The optical fiber (15) is disposed between the two movable elements (9, 10) in the form of a comb, each fixed on an end part (2b, 2c) of the support. The elements (9, 10) include active surfaces coming into contact with the fiber (15) to produce a variable reverse bending of the fiber (15) in the course of their relative movement.

REFERENCES:
patent: 3204463 (1965-09-01), Taber
patent: 3333472 (1967-08-01), McLellan
patent: 3894435 (1975-07-01), Shimada et al.
patent: 4163397 (1979-08-01), Harmer
patent: 4342907 (1982-08-01), Macedo et al.
patent: 4545253 (1985-10-01), Avicola
patent: 4659923 (1987-04-01), Hicks, Jr.
patent: 4933545 (1990-06-01), Saaski et al.

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