Title

Wireless SAW Sensor Temperature Extraction Precision

Authors

Authors

L. M. Rodriguez; D. R. Gallagher; M. W. Gallagher; B. H. Fisher; J. R. Humphries;D. C. Malocha

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

IEEE Sens. J.

Keywords

SAW; orthogonal frequency coding; passive wireless sensor; precision; performance; SURFACE ACOUSTIC-WAVES; TAGS; Engineering, Electrical & Electronic; Instruments & Instrumentation; Physics, Applied

Abstract

Surface acoustic wave (SAW) devices are suitable for use in harsh environments because of their ruggedness under radiation and extreme temperatures and ability to be configured as passive wireless sensors. This orthogonal frequency coded (OFC) sensor system consists of a transceiver that wirelessly interrogates the passive SAW sensor, which can be used in several types of environments. A modified radar equation is presented that can be used to estimate the signal power from the returned sensor signal as a function of practical parameters. The precision performance of the OFC passive wireless sensor, not previously investigated, is shown to be a function of signal-to-noise ratio as expected from an analog sensor; extracted temperature precision better than 0.001 degrees C is reported. Signal integration is an effective means to increase the precision and/or range of the wireless temperature extraction scheme when deciding if the OFC passive wireless sensing scheme will fit a particular application.

Journal Title

Ieee Sensors Journal

Volume

14

Issue/Number

11

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

3830

Last Page

3837

WOS Identifier

WOS:000346963700012

ISSN

1530-437X

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