Measuring and testing – Liquid level or depth gauge
Patent
1983-03-02
1986-04-08
Frankfort, Charles
Measuring and testing
Liquid level or depth gauge
374 54, 356355, 343720, 324 585B, G01F 2300, G01N 2100
Patent
active
045804494
ABSTRACT:
A method for detecting the surface level of a molten metal, particularly in a continuous casting process, utilizes the thermal radiations emanating from the surface of the metal. An antenna is directed so that its beam width encompasses a portion of the surface of the metal and the adjacent inner wall of the mold or container. The interference between radiations that propagate directly to the antenna from the surface of the metal and those that are reflected off the container wall is measured in terms of its electric power, i.e., the electromagnetic component of the radiations. Fluctuations in the measured electric power are indicative of changes in the level of the metal.
REFERENCES:
patent: 3325644 (1967-06-01), Frye et al.
patent: 4160168 (1979-07-01), Funck
patent: 4347515 (1982-08-01), Hoover et al.
"Manual of Remote Sensing", American Society of Photogrammetry, 1975, vol. 1 and 2, pp. 516-527.
Hach, Joham-Peter, "A Very Sensitive Airborne Microwave Radiometer Using Two Reference Temperatures", IEEE Transactions on Microwave Theory and Techniques, vol. T-16, No. 9, Sep. 1968.
Hatono Akio
Kobayashi Sumio
Frankfort Charles
Sumitomo Metal Industries Ltd.
Worth W. Morris
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