Digital electronics for controlling a fiber optic shedding flowm

Details Digital electronics for controlling a fiber optic shedding flowm Digital electronics for controlling a fiber optic shedding flowm

1988-11-07

1990-09-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

7386124, 25023110, H01J 4014

Patent

active

049580701

ABSTRACT:
A digital controlling system for fiber optic vortex shedding flowmeters which provides a new and improved preamp circuit and a computer for correcting temperature, linearity and hysteresis effects. The controlling system overcomes the inherent non-linearity of the vortex shedding phenomena and also provides two-way communication between a central control unit and the fiber optic vortex shedding flowmeter. The improved preamp circuitry increases the low-end range of fiber optic vortex shedding flowmeters.

REFERENCES:
patent: 4019384 (1977-04-01), Herzl
patent: 4390956 (1983-06-01), Cornforth et al.
patent: 4589279 (1986-05-01), Mitsuyasu et al.
patent: 4594504 (1986-06-01), Coursolle
patent: 4648280 (1987-03-01), Miyoshi et al.
patent: 4706502 (1987-11-01), Jones
patent: 4742574 (1988-05-01), Smith

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