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Apparatus and method for high temperature viscosity and temperature measurements

United States Patent

October 2, 2001
View the Complete Patent at the US Patent & Trademark Office
A probe for measuring the viscosity and/or temperature of high temperature liquids, such as molten metals, glass and similar materials comprises a rod which is an acoustical waveguide through which a transducer emits an ultrasonic signal through one end of the probe, and which is reflected from (a) a notch or slit or an interface between two materials of the probe and (b) from the other end of the probe which is in contact with the hot liquid or hot melt, and is detected by the same transducer at the signal emission end. To avoid the harmful effects of introducing a thermally conductive heat sink into the melt, the probe is made of relatively thermally insulative (non-heat-conductive) refractory material. The time between signal emission and reflection, and the amplitude of reflections, are compared against calibration curves to obtain temperature and viscosity values.
Balasubramaniam; Krishnan (Mississippi State, MS), Shah; Vimal (Houston, TX), Costley; R. Daniel (Mississippi State, MS), Singh; Jagdish P. (Mississippi State, MS)
Mississippi State University (Mississippi State, MS)
09/ 075,922
May 12, 1998
This invention was made with U.S. Government support under contract number DE-FG02-93CH0575 awarded by the Department of Energy. The U.S. Government may have certain rights in this invention.