Interrogation of orthogonal frequency coded SAW sensors using the USRP

Humphries, James R.; Gallagher, M.; Gallagher, D.R.; Weeks, Arthur R.; Malocha, D.C.

doi:10.1109/fcs.2015.7138900

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…In [ 146 ], a PXIe-based SAW interrogator has been presented that can operate in any frequency band between 85 MHz up to 6.6 GHz. Likewise, the popular universal software radio peripheral (USRP) platform widely used for research in wireless communication was programmed as the reader for OFC SAW sensor interrogation [ 147 , 148 ]. The front end of the USRP B200 platform can process RF signals between 70 MHz–6 GHz with an instantaneous bandwidth of 56 MHz.…”

Section: Overall Comparison and Discussionmentioning

confidence: 99%

Reader Architectures for Wireless Surface Acoustic Wave Sensors

Lurz

Ostertag²,

Scheiner

et al. 2018

Sensors

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Wireless surface acoustic wave (SAW) sensors have some unique features that make them promising for industrial metrology. Their decisive advantage lies in their purely passive operation and the wireless readout capability allowing the installation also at particularly inaccessible locations. Furthermore, they are small, low-cost and rugged components on highly stable substrate materials and thus particularly suited for harsh environments. Nevertheless, a sensor itself does not carry out any measurement but always requires a suitable excitation and interrogation circuit: a reader. A variety of different architectures have been presented and investigated up to now. This review paper gives a comprehensive survey of the present state of reader architectures such as time domain sampling (TDS), frequency domain sampling (FDS) and hybrid concepts for both SAW resonators and reflective SAW delay line sensors. Furthermore, critical performance parameters such as measurement accuracy, dynamic range, update rate, and hardware costs of the state of the art in science and industry are presented, compared and discussed.

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Section: Overall Comparison and Discussionmentioning

confidence: 99%