Method and sensor device for measuring a physical parameter util

Details Method and sensor device for measuring a physical parameter util Method and sensor device for measuring a physical parameter util

1981-02-02

1983-04-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73653, 73657, 250231P, G01L 110, G02B 514

Patent

active

043792260

ABSTRACT:
A light beam is transmitted by a fiber optical cable to a light modulation device such as a vibrating filament, bar or plate. This device or oscillator modulates the light intensity with a frequency which is dependent upon the physical parameter to be measured. Oscillations are sustained by a striking device. The modulated light beam is transmitted by a fiber optical cable from the measurement location to an evaluation location where the frequency of the modulated light beam is measured. The measured frequency is a function of the physical parameter.

REFERENCES:
patent: 3882718 (1975-05-01), Kriebel
patent: 4071753 (1978-01-01), Fulenwider et al.
patent: 4118977 (1978-10-01), Olsen et al.
patent: 4275296 (1981-06-01), Adolfsson
patent: 4345482 (1982-08-01), Adolfsson et al.
K. A. James, W. H. Quick and V. H. Stahan, "Fiber Optics: The Way to True Digital Sensors?", Control Engineering, Feb. 1979, pp. 30-33.

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