Methanol sensor using a surface acoustic wave

T. Nomura, K. Nishida, Atsushi Saitoh, T. Mochiizuki

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

Abstract

The propagation characteristics of a surface acoustic wave (SAW) that travels along the surface of a solid object can vary significantly depending on the surrounding environment. SAW devices are employed in sensors that measure many different kinds of environments and their changes. This paper discusses a SAW sensor used to measure the concentration of methanol, a fuel required by methanol fuel cells. The permittivity of methanol exhibits significant variation depending on the concentration and the temperature. Two SAW resonators were used to measure the permittivity of a liquid; one with the cavity surface as an electrically open circuit, and the other short-circuited. Two resonating systems were constructed from an amplifier and a SAW resonator, and fluid was allowed to run through the cavities of the two resonators to measure the difference in the oscillation frequency. This difference in frequency changed in proportion to the permittivity of the liquid, so that its concentration could be measured. It was also experimentally demonstrated that the use of SAW resonators can stabilize measurements and improve reproducibility. A sensing system made of liquid flow cells and SAW sensors was then proposed. The proposed system is able to measure the real time concentration of methanol independently of the temperature and with good reproducibility.

Original languageEnglish
Title of host publication2008 IEEE International Frequency Control Symposium, FCS
Pages526-531
Number of pages6
DOIs
Publication statusPublished - 2008
Event2008 IEEE International Frequency Control Symposium, FCS - Honolulu, HI
Duration: 2008 May 192008 May 21

Other

Other2008 IEEE International Frequency Control Symposium, FCS
CityHonolulu, HI
Period08/5/1908/5/21

Fingerprint

Surface waves
Methanol
Acoustic waves
Resonators
Sensors
Permittivity
Liquids
Methanol fuels
Acoustic surface wave devices
Wave propagation
Fuel cells
Temperature
Fluids
Networks (circuits)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Nomura, T., Nishida, K., Saitoh, A., & Mochiizuki, T. (2008). Methanol sensor using a surface acoustic wave. In 2008 IEEE International Frequency Control Symposium, FCS (pp. 526-531). [4623054] https://doi.org/10.1109/FREQ.2008.4623054

Methanol sensor using a surface acoustic wave. / Nomura, T.; Nishida, K.; Saitoh, Atsushi; Mochiizuki, T.

2008 IEEE International Frequency Control Symposium, FCS. 2008. p. 526-531 4623054.

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

Nomura, T, Nishida, K, Saitoh, A & Mochiizuki, T 2008, Methanol sensor using a surface acoustic wave. in 2008 IEEE International Frequency Control Symposium, FCS., 4623054, pp. 526-531, 2008 IEEE International Frequency Control Symposium, FCS, Honolulu, HI, 08/5/19. https://doi.org/10.1109/FREQ.2008.4623054
Nomura T, Nishida K, Saitoh A, Mochiizuki T. Methanol sensor using a surface acoustic wave. In 2008 IEEE International Frequency Control Symposium, FCS. 2008. p. 526-531. 4623054 https://doi.org/10.1109/FREQ.2008.4623054
Nomura, T. ; Nishida, K. ; Saitoh, Atsushi ; Mochiizuki, T. / Methanol sensor using a surface acoustic wave. 2008 IEEE International Frequency Control Symposium, FCS. 2008. pp. 526-531
@inproceedings{16b125a891b54aa48aeb0f5a137b2578,
title = "Methanol sensor using a surface acoustic wave",
abstract = "The propagation characteristics of a surface acoustic wave (SAW) that travels along the surface of a solid object can vary significantly depending on the surrounding environment. SAW devices are employed in sensors that measure many different kinds of environments and their changes. This paper discusses a SAW sensor used to measure the concentration of methanol, a fuel required by methanol fuel cells. The permittivity of methanol exhibits significant variation depending on the concentration and the temperature. Two SAW resonators were used to measure the permittivity of a liquid; one with the cavity surface as an electrically open circuit, and the other short-circuited. Two resonating systems were constructed from an amplifier and a SAW resonator, and fluid was allowed to run through the cavities of the two resonators to measure the difference in the oscillation frequency. This difference in frequency changed in proportion to the permittivity of the liquid, so that its concentration could be measured. It was also experimentally demonstrated that the use of SAW resonators can stabilize measurements and improve reproducibility. A sensing system made of liquid flow cells and SAW sensors was then proposed. The proposed system is able to measure the real time concentration of methanol independently of the temperature and with good reproducibility.",
author = "T. Nomura and K. Nishida and Atsushi Saitoh and T. Mochiizuki",
year = "2008",
doi = "10.1109/FREQ.2008.4623054",
language = "English",
isbn = "9781424417957",
pages = "526--531",
booktitle = "2008 IEEE International Frequency Control Symposium, FCS",

}

TY - GEN

T1 - Methanol sensor using a surface acoustic wave

AU - Nomura, T.

AU - Nishida, K.

AU - Saitoh, Atsushi

AU - Mochiizuki, T.

PY - 2008

Y1 - 2008

N2 - The propagation characteristics of a surface acoustic wave (SAW) that travels along the surface of a solid object can vary significantly depending on the surrounding environment. SAW devices are employed in sensors that measure many different kinds of environments and their changes. This paper discusses a SAW sensor used to measure the concentration of methanol, a fuel required by methanol fuel cells. The permittivity of methanol exhibits significant variation depending on the concentration and the temperature. Two SAW resonators were used to measure the permittivity of a liquid; one with the cavity surface as an electrically open circuit, and the other short-circuited. Two resonating systems were constructed from an amplifier and a SAW resonator, and fluid was allowed to run through the cavities of the two resonators to measure the difference in the oscillation frequency. This difference in frequency changed in proportion to the permittivity of the liquid, so that its concentration could be measured. It was also experimentally demonstrated that the use of SAW resonators can stabilize measurements and improve reproducibility. A sensing system made of liquid flow cells and SAW sensors was then proposed. The proposed system is able to measure the real time concentration of methanol independently of the temperature and with good reproducibility.

AB - The propagation characteristics of a surface acoustic wave (SAW) that travels along the surface of a solid object can vary significantly depending on the surrounding environment. SAW devices are employed in sensors that measure many different kinds of environments and their changes. This paper discusses a SAW sensor used to measure the concentration of methanol, a fuel required by methanol fuel cells. The permittivity of methanol exhibits significant variation depending on the concentration and the temperature. Two SAW resonators were used to measure the permittivity of a liquid; one with the cavity surface as an electrically open circuit, and the other short-circuited. Two resonating systems were constructed from an amplifier and a SAW resonator, and fluid was allowed to run through the cavities of the two resonators to measure the difference in the oscillation frequency. This difference in frequency changed in proportion to the permittivity of the liquid, so that its concentration could be measured. It was also experimentally demonstrated that the use of SAW resonators can stabilize measurements and improve reproducibility. A sensing system made of liquid flow cells and SAW sensors was then proposed. The proposed system is able to measure the real time concentration of methanol independently of the temperature and with good reproducibility.

UR - http://www.scopus.com/inward/record.url?scp=55649109411&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=55649109411&partnerID=8YFLogxK

U2 - 10.1109/FREQ.2008.4623054

DO - 10.1109/FREQ.2008.4623054

M3 - Conference contribution

AN - SCOPUS:55649109411

SN - 9781424417957

SP - 526

EP - 531

BT - 2008 IEEE International Frequency Control Symposium, FCS

ER -