Electromagnetic measurement of quantities in connection with ele

Details Electromagnetic measurement of quantities in connection with ele Electromagnetic measurement of quantities in connection with ele

1977-05-17

1979-03-20

Myracle, Jerry W.

Measuring and testing

Liquid level or depth gauge

G01F 2300

Patent

active

041447565

ABSTRACT:
A system for electromagnetically measuring level, distance or flow rate in connection with molten metal contained in a furnace, mould, channel or the like. Separate coreless single or few-turn transmitter and receiver coils are used, the coils being essentially freely positionable relative to the walls of the furnace etc. At least two signal channels are included for signal processing and for producing counteraction between transmitter and/or receiver signals so as to produce a basic measurement signal that is at least substantially balanced with regard to disturbing and unbalance signals, whereby the small variations of the signals induced in the receiver coil or coils due to changes of the level, distance or flow rate of the molten metal can be accurately detected.

REFERENCES:
patent: 2680968 (1954-06-01), Cockett
patent: 3678748 (1972-07-01), Dziedzic
patent: 3962919 (1976-06-01), Playfoot et al.
patent: 4007636 (1977-02-01), Wahl

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