Electromagnetic measurement of level and/or distance for electri

Details Electromagnetic measurement of level and/or distance for electri Electromagnetic measurement of level and/or distance for electri

1977-05-17

1979-02-13

Myracle, Jerry W.

Measuring and testing

Liquid level or depth gauge

G01F 2300

Patent

active

041388887

ABSTRACT:
An arrangement for electro-magnetically measuring level of and/or distance to molten metal contained in a container, particularly a torpedo ladle wagon. Separate transmitter and receiver coils are located displaced relative to each other at or in the container walls so that the molten metal forms an AC magnetic screen between the coils when reaching a predetermined level. Before the molten metal cuts off the alternating magnetic field from the transmitter coil to the receiver coil, the alternating magnetic field sensed by the receiver coil is increased due to alternating magnetic field generated by electric currents induced at the surface of the raising molten metal. The top amplitude of the signal obtained in the receiver coil increases as the wear and erosion of the container lining proceeds.

REFERENCES:
patent: 3834234 (1974-09-01), Kobayashi et al.
patent: 4007636 (1977-02-01), Wahl

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