Doppler Microwave Cavity Monitor for Particulate Loading
- 1 March 1977
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 26 (1), 13-17
- https://doi.org/10.1109/tim.1977.4314475
Abstract
A real-time particulate loading monitor using a multimode microwave cavity is described and analyzed. Microwave power in the cavity volume is scattered with a Doppler shifted frequency by particulates suspended in a gas flowing through the cavity. Detection of the scattered radiation by beating it with the nonscattered radiation provides an indication of the particulate loading. A proof-of-concept experimental setup is described with the obtained results. The monitoring system is not very sensitive to particulates smaller than 1 μm. However, it is very well suited to operations where the effluent gas is under high pressure and temperature.Keywords
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