Method and apparatus for detecting soot concentration in...

Details Method and apparatus for detecting soot concentration in... Method and apparatus for detecting soot concentration in...

G - Physics

01

N

324/30, 324/42

G01N 22/00 (2006.01) F01N 9/00 (2006.01) F01N 11/00 (2006.01) G01R 27/26 (2006.01) G01N 15/06 (2006.01)

Patent

CA 2022702

A method of detecting the accumulation of particulate material collected on a filter medium formed of dielectric material in a chamber having the property of a microwave waveguide or transmission line comprises the steps of exciting the chamber with a microwave signal and monitoring the transmission loss of the signal through the line to sense the effective dielectric loss factor and thereby to provide an indication of the concentration or level of particulate material accumulated on the filter medium.

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