Float detection system

Details Float detection system Float detection system

1982-03-01

1985-02-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73314, G01N 1506

Patent

active

045019720

ABSTRACT:
The specification discloses a method and apparatus for detecting the position of the float in a glass tube flow meter, and determining the distance of said float from a reference line on the glass tube flow meter which is being calibrated. The blockage of an infrared light beam being sent from a transmitter to dual photo receivers, coupled to an optical conditioner circuit, provides an indication of whether float is high, low or in-band in relationship to the desired position, while a float follower, which is movable along the length of the flow tube by a stepper motor which is connected to a pulse encoder, provides through an optical conditioner circuit, an indication of the float position with regard to the reference line on the glass tube. The circuitry also provides for the automatic tracking of the float as its position is changed by the operator.

REFERENCES:
patent: 3404568 (1968-10-01), Humber et al.
patent: 3993898 (1976-11-01), Guliani et al.
patent: 4200806 (1980-04-01), Walker et al.
patent: 4220903 (1980-09-01), Schumann

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