...外激光光源; 甲烷浓度; 差分吸收; 光开关; 光纤网络传感器 [gap=1282]Key words: infrared light supply; methane concentration; differential absorption; photo-switch; optic-fiber network sensor ..
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methane concentration distribution ch4浓度分布
Methane Concentration Sensor 甲烷浓度传感
methane concentration detection 甲烷浓度检测
low concentration methane 低浓度甲烷
methane volume concentration 甲烷体积分数
methane of low concentration 低浓度瓦斯
Methane concentration measurement is the paper’s purpose. Fiber methane gas sensing technique is studied based on the principle of near infrared absorption.
论文以甲烷浓度检测为目的,进行基于近红外吸收原理的光纤甲烷气体传感技术的研究。
参考来源 - 基于近红外吸收原理的甲烷浓度检测研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The methane concentration nearly doubled, for example, between the peak of the penultimate glacial period and the following interglacial period.
例如，在倒数第二个冰期的高峰和接下来的间冰期之间，甲烷浓度几乎增加了一倍。
Therefore, it is very important to measure the distribution of methane concentration during construction and operation of subway tunnel in real-time.
实时准确地检测地铁隧道施工及运营期间的瓦斯浓度对保障安全生产具有十分重要的意义。
The methane concentration has less effect on pressure loss.
乏风甲烷浓度对压强损失影响较小；
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