Evaluation of response time in ball surface-acoustic-wave hydrogen sensor using digital quadrature detector

Takuji Abe, Naoya Iwata, Toshihiro Tsuji, Tsuyoshi Mihara, Shingo Akao, Kazuhiro Noguchi, Noritaka Nakaso, Dongyoun Sim, Yusuke Ebi, Takeshi Fukiura, Hidekazu Tanaka, Kazushi Yamanaka

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Hydrogen leak detection sensors must have high sensitivity and a short response time of 1 s or less. A ball surface-acousticwave (SAW) hydrogen sensor has a high sensitivity and can detect hydrogen in a very wide concentration range of lOppm to 100%. Moreover, a fast response can be expected because of the very thin sensitive film used. In this study, we developed a digital quadrature detector (DQD) to measure responses of less than 1 s, and measure phases in 1 ms intervals with excellent sensitivity. We evaluated the response time of the ball SAW hydrogen sensor where the signal was averaged 256 times in 0.256 s using the DQD. As a result, the response time was found to be Is or less for 3.0 vol % hydrogen gas in nitrogen.

Original languageEnglish
Pages (from-to)4726-4728
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number7 B
DOIs
Publication statusPublished - 2007 Jul 26

Keywords

  • Ball SAW device
  • Hydrogen sensor
  • Quadrature detector
  • Response time

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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