Vehicle mounted methane detector by means of LD spectroscopy combined with a mobile GIS

• Iseki Takaya

  Tokyo Gas Co.

• Ookita Yuji

  Tokyo Gas Co.

• Kotsubo Hironori

  Tokyo Gas Co.

• Tai Hideo

  Tokyo Gas Co.

• Kimura Kiyoshi

  Anritsu Co.

Bibliographic Information

Other Title

• 携帯型マッピングシステム連動車載式LD分光メタン検出装置
• ケイタイガタ マッピング システム レンドウ シャサイシキ LD ブンコウ メ

Abstract

We have developed a vehicle mounted methane detector by means of 1.65-micron LD (Laser Diode) spectroscopy combined with a mobile GIS (Geographic Information System). The detector is used for high-speed survey of gas leakage from underground pipelines.<br>The detection limit of the detector is about 70 ppb in optical path length of 1 meter with time constant of 1 second. This high sensitivity is achieved by second-harmonic detection of modulation frequency of the LD the center wavelength of which is stabilized on the center of an absorption line of methane.<br>The position of the vehicle is determined with accuracy of 1-3 meters by a vehicle positioning machine which is connected to a DGPS (Differential GPS, GPS: Global Positioning System) receiver and a fiber-optic gyroscope. Survey tracks and detection points are displayed and recorded on the mobile GIS which consists of information of pipeline network, streets, buildings and so on.

Journal

• IEEJ Transactions on Electronics, Information and Systems

  IEEJ Transactions on Electronics, Information and Systems 118 (5), 624-629, 1998

  The Institute of Electrical Engineers of Japan

Keywords

• GIS
• DGPS

Details

• CRID: 1390001204607377408
• NII Article ID: 130006843317
• NII Article ID: 10002813695
• NII Book ID: AN10065950
• DOI: 10.1541/ieejeiss1987.118.5_624
• ISSN: 13488155
• ISSN: 03854221
• NDL BIB ID: 4469903
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4469903
• Web Site: https://www.jstage.jst.go.jp/article/ieejeiss1987/118/5/118_5_624/_pdf
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• Abstract License Flag: Disallowed