Title :
Weigh-in-motion (WIM) sensor based on EM resonant measurements
Author :
Liu, C.R. ; Guo, L. ; Li, J. ; Chen, X.
Author_Institution :
Houston Univ., Houston
Abstract :
A novel microwave WIM sensor is presented in this paper. The microwave WIM sensor is an active sensor based on the perturbation theory of microwave resonant cavities. The microwave signal generated by a DDS-based synthesizer circuit is coupled into the sensor and the returned signal is measured to determine the load applied to the sensor. The microwave WIM sensor was designed, simulated and tested in the lab. The TE11L cavity mode of the sensor was found to be the best choice for WIM applications. The sensor shows an excellent linearity, uniformity and measurement accuracy from the results of the lab test.
Keywords :
cavity resonators; microwave detectors; perturbation theory; weighing; DDS-based synthesizer circuit; EM resonant measurements; TE11L cavity mode; active sensor; measurement accuracy; microwave resonant cavities; microwave sensor; perturbation theory; weigh-in-motion sensor; Circuit simulation; Coupling circuits; Microwave circuits; Microwave generation; Microwave measurements; Microwave sensors; Microwave theory and techniques; Resonance; Signal generators; Synthesizers; cavity resonators; microwave sensors; perturbation methods; weight measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0877-1
Electronic_ISBN :
978-1-4244-0878-8
DOI :
10.1109/APS.2007.4395555
