A specially designed air-cooled compact antenna is proposed for non-contact real-time radio detection and ranging (RADAR)-level measurement in furnace. 3-D modeling is used to optimize the surface profile of the RADAR antenna for beam symmetry and low sidelobe level over 20-24 GHz. The fabricated RADAR sensor deployed in mono-static mode has 0.19-mm measurement error for a static target. Measurements in a closed furnace at 1100 °C demonstrate the feasibility of non-contact in-situ monitoring of the level of molten metal for long duration (11 hours) without degradation in the sensor performance. © 2001-2012 IEEE.

Kavitha Arunachalam

Department of Engineering Design

C V Krishnamurthy

Department Of Physics

Balamurugan T. Sivaprakasam

Antenna lobes

Furnaces

Level measurement

Liquid metals

Microwave antennas

Radar

Radar antennas

BEAM SYMMETRY

Compact antenna

CORRUGATED CONICAL HORNS

In- situ monitoring

LOW SIDE LOBES

RADAR SENSORS

Sensor performance

Surface profiles

Radar measurement

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Design and Demonstration of a RADAR Gauge for In-Situ Level Measurement in Furnace

IEEE Sensors Journal

Non-contact measurement of the level of molten glass is demonstrated in an engineering scale induction-heated glass melter using microwaves. The microwave sensor is a corrugated horn used in mono static RADAR (RAdio Detection and Ranging) mode operating over 20 to 24 GHz with 20 dB gain. The ability to measure the level of the glass melt is demonstrated using an off-centered port in an induction glass melting furnace. © 2019 URSI. All rights reserved.

2019 URSI Asia-Pacific Radio Science Conference, AP-RASC 2019

Feasibility of In-Situ process monitoring of glass melt in industrial furnace using microwaves

Non-contact real time microwave measurement and signal analysis techniques to extract high temperature material parameters from the mono-static reflections gathered by a compact air cooled corrugated horn are presented in this work. Non-contact in situ microwave measurements gathered over 20-24 GHz inside a closed furnace were processed to identify the thermodynamic phase change temperature of metal and glass melts. The melting point of aluminum alloy and glass transition of a borosilicate glass matrix extracted from the time gated and processed microwave measurements were in good agreement with differential scanning calorimetry measurements. Thus, the ability to measure high temperature material process parameters using non-contact microwave measurements is demonstrated. © 2019 Author(s).

Fulltext

Review of Scientific Instruments

Non-contact in situ microwave material measurements for high temperature process monitoring

Camera-Vision-Based Water Level Estimation

Sensors and Actuators A: Physical

A self-calibration water level measurement using an interdigital capacitive sensor

Journal	Data powered by TypesetIEEE Sensors Journal
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN	1530437X
Open Access	No