Fiber-optic liquid level sensor

Details Fiber-optic liquid level sensor Fiber-optic liquid level sensor

1990-10-30

1991-12-17

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

73293, 73715, G01F 2316

Patent

active

050726170

ABSTRACT:
A fiber-optic liquid level sensor measures the height of a column of liquid through the hydrostatic pressure it produces. The sensor employs a fiber-optic displacement sensor to detect the pressure-induced displacement of the center of a corrugated diaphragm.

REFERENCES:
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patent: 3590640 (1971-07-01), Cindrich
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patent: 4048855 (1977-09-01), Sejournet
patent: 4227410 (1980-10-01), Ruben et al.
patent: 4521683 (1985-06-01), Miller
patent: 4809589 (1989-03-01), Bertrand
Pressure Sensing Diaphragm Assemblies, Kearflex Engineering Co., Bulletin No. 461C (from 1951).
J. A. Morris and C. R. Pollack, "A Digital Fiber-Optic Liquid Level Sensor," Journal of Lightwave Technology, vol. LT-5, No. 7, pp. 920-925.
C. P. Yakymyshyn and C. R. Pollack, "Differential Absorption Fiber-Optic Liquid Level Sensor," J. Lightwave Technol., vol. LT-5, Jul. 1987, pp. 941-946.
T. G. Giallorenzi, et al., "Optical-Fiber Sensors Challenge the Competition," IEEE Spectrum, Sep. 1986, pp. 44-49.
M. A. Belkerdid, et al., "Fiber Optic Fluid Level Sensor," SPIE vol. 566 Fiber Optic and Laser Sensors III, 1985, pp. 153-158.
A. R. Tebo, "Sensing with Optical Fibers: An Emerging Technology," Electro-Optical Systems Design, Feb. 1982, pp. 39-45.

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