Objective The dynamic monitoring and early warning of methane in the process of oil and gas production,storage,transportation and so on is very important.The existing laser methane measurement devices can not simultaneously measure the volume fraction of methane and position it.A new cloud positioning laser methane measurement platform designed in this study can better solve this problem.Methods Firstly,the principle of laser methane detection and location were analyzed.Secondly,TDLAS technology was used to complete the overall design of a new cloud positioning laser methane measurement platform.Finally,the methane standard gas test and positioning field test were carried out through the measuring platform.Results The measurement results indicate that the maximum relative error of the measurement platform for column density values of methane standard gas is 3.5%,with a repeatability relative standard deviation of less than 1.88%.Additionally,the maximum errors in latitude and longitude are 1″ and 2″,respectively,while the effective monitoring distance is 150 m.Conclusion The new cloud positioning laser methane measurement platform has good accuracy and stability,and can be applied to field inspection of gas safety.
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