Method of detecting the level of a melt in a...

Details Method of detecting the level of a melt in a... Method of detecting the level of a melt in a...

G - Physics

01

F

73/69

G01F 23/22 (2006.01) G01F 23/26 (2006.01)

Patent

CA 1198293

ABSTRACT OF THE DISCLOSURE The invention is concerned with a method of detecting the level of a melt in a continuous-casting mold by means of a primary coil and at least three vertically spaced secondary coils surrounding the mold. According to the invention, a primary magnetic field is formed with the primary coil, which extends horizontally through the mold into the melt generally at the melt level. This primary field generates eddy currents in the melt that in turn generate secondary fields that induce in the secondary coils voltages that peak as the melt level comes level with the secondary coils. Each of the induced voltages is combined with each of the other induced voltages to provide a plurality of output voltage curves each correspond- ing to the combined outputs of the respective two induced voltages and each peaking when the melt level lies at a respective location intermediate the respective induced voltages. The melt level position relative to the coils is derived from these output voltage curves.

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