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Abstract
Step frequency continuous wave (SFCW) RAdio Detection And Ranging (RADAR) sensor is proposed for non-contact measurement of the absolute level of molten solids in industrial furnaces. A conical horn is optimized for operation over 10–16 GHz in mono-static configuration for level measurement. The absolute distance of a stationary target was measured with 3 mm accuracy using the SFCW RADAR sensor in mono-static mode. Stable measurements were recorded for 4.35 h in a furnace at 450 °C. Level measurements of molten glass and aluminum in 1100 °C furnace indicate the feasibility of industrial-level gauging.
Acknowledgments
The authors thank Dr. Jayesh Shah, Head Matrix Development Section, Bhabha Atomic Research Centre, India for glass beads, Prof. Krishnan Balasubramanian, Department of Mechanical Engineering, IITM for access to the VNA, and Mr. G. Balaganesan, Central Workshop, IITM for access to the smelting furnace.