Microwave Resonator Sensor for Detection of Dielectric Objects in Metal Pipes
Paper in proceedings, 2015

We present a microwave sensor for detection of dielectric objects in material mixtures that are transported in metal pipes. The sensor exploits several resonant modes that operate below the cut-off frequency of the dominant waveguide mode in the pipe. This non-invasive measurement technique is particularly attractive for detection of undesirable objects in certain industries. Initial measurements on a prototype sensor show good agreement with electromagnetic simulations and indicate favorable detection properties. A detection algorithm based on the likelihood-ratio test is evaluated based on synthetically generated data from a finite-element model that simulates inhomogeneous background materials. We conclude that the multi-mode feature of the sensor is advantageous for the ability to distinguish between undesirable objects and ordinary fluctuations in the background material.

signal detection

microwave resonator

microwave measurement

Author

Johan Nohlert

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Thomas Rylander

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Tomas McKelvey

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 11-14 May 2015, Pisa

1091-5281 (ISSN)

914-919

Areas of Advance

Production

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

Driving Forces

Innovation and entrepreneurship

Subject Categories

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/I2MTC.2015.7151391

ISBN

978-1-4799-6113-9

More information

Created

10/7/2017