Method and apparatus for monitoring a liquid level

Details Method and apparatus for monitoring a liquid level Method and apparatus for monitoring a liquid level

1986-10-20

1988-03-01

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

164 41, 164452, 164457, G05D 900

Patent

active

047288752

ABSTRACT:
A method and apparatus are provided for monitoring the surface level of a liquid, such as molten metal, by moving first and second sensing electrodes vertically with respect to the surface level of the liquid, positioning the lower portion of the second electrode vertically displaced upwardly with respect to the lower portion of the first electrode, such that the amount of vertical displacement is directly related to the accuracy of determining the liquid level, generating an electrical signal as a function of each electrode position, then moving the first and second electrode vertically with respect to the surface level of the liquid in response to the electrical signal corresponding to each electrode, and thereafter determining the liquid level when the first electrode is in contact with the liquid and the second electrode is in noncontacting position above the liquid.

REFERENCES:
patent: 3181361 (1965-05-01), Bell
patent: 4600844 (1986-07-01), Atkins

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