TY - JOUR
T1 - Differential absorption lidar at 1.67 μm for remote sensing of methane leakage
AU - Ikuta, Kouki
AU - Yoshikane, Noboru
AU - Vasa, Nilesh
AU - Oki, Yuji
AU - Maeda, Mitsuo
AU - Uchiumi, Michihiro
AU - Tsumura, Youichirou
AU - Nakagawa, Jun
AU - Kawada, Noriyuki
PY - 1999
Y1 - 1999
N2 - A differential absorption lidar (DIAL) for field monitoring of methane (CH4) leakage at a wavelength of 1.67 μm was developed. Compared with traditional DIAL systems for environmental monitoring, this system has a higher distance resolution (∼15m) for determining the leak position and a shorter detection range up to 500m. First, considering appropriate design parameters, a theoretical simulation was performed to evaluate the sensitivity and the detectable range of the system. Based on the analytical simulation, a prototype DIAL system was constructed and the detection of CH4 which had leaked into the atmosphere was demonstrated. The CH4 leakage of 6000 ppm·m at a distance of 130 m was successfully detected. The detection limit was 1000 ppm·m. With the improvements in the light source and the detector system, the detectable boundary can be increased in the range from 90 to 540m for a concentration of 1500 ppm·m.
AB - A differential absorption lidar (DIAL) for field monitoring of methane (CH4) leakage at a wavelength of 1.67 μm was developed. Compared with traditional DIAL systems for environmental monitoring, this system has a higher distance resolution (∼15m) for determining the leak position and a shorter detection range up to 500m. First, considering appropriate design parameters, a theoretical simulation was performed to evaluate the sensitivity and the detectable range of the system. Based on the analytical simulation, a prototype DIAL system was constructed and the detection of CH4 which had leaked into the atmosphere was demonstrated. The CH4 leakage of 6000 ppm·m at a distance of 130 m was successfully detected. The detection limit was 1000 ppm·m. With the improvements in the light source and the detector system, the detectable boundary can be increased in the range from 90 to 540m for a concentration of 1500 ppm·m.
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U2 - 10.1143/JJAP.38.110
DO - 10.1143/JJAP.38.110
M3 - Article
AN - SCOPUS:0032651254
SN - 0021-4922
VL - 38
SP - 110
EP - 114
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
IS - 1
ER -