Passive 2.45 GHz TDMA based multi-sensor wireless temperature monitoring system: Results and design considerations

J. H. Kuypers, Shuji Tanaka, Masayoshi Esashi, D. A. Eisele, L. M. Reindl

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Citations (Scopus)

Abstract

This paper presents a TDMA (time division multiple access) based wireless temperature monitoring system using 2.45 GHz passive surface acoustic wave (SAW) delay line sensors. A three-step resolution refinement scheme using a combined delay and phase evaluation is proposed. Using a transmission power of 2 dBm (1.59 mW) a temperature accuracy of 0.19 K and 0.1 K (6σ), were achieved for an interrogation distance of 1.4 m, and 1.3 m, respectively. The sensor design is discussed using experimental results concerning the relationship between the SNR (signal to noise ratio) of the sensors and the accuracy in time delay or phase measurement. Also, the direct electron beam writing on chemically-reduced (black) LiNbO3 is described.

Original languageEnglish
Title of host publication2006 IEEE International Ultrasonics Symposium, IUS
Pages1453-1458
Number of pages6
DOIs
Publication statusPublished - 2006 Dec 1

Publication series

NameProceedings - IEEE Ultrasonics Symposium
Volume1
ISSN (Print)1051-0117

Keywords

  • Delay line sensors
  • K-Model
  • SNR (signal to noise ratio)
  • TDMA
  • Wireless SAW sensors

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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