FU Hua, JING Yi-peng. Study on a high sensitivity optical fiber sensor for measuring methane volume fraction[J]. 2010, 29(4): 15-17. DOI: 10.13873/j.1000-97872010.04.022.
a new method for measuring methane volume fraction under complex environment.This method can effectively reduce the measurement error caused by the instability of light source and environmental changes.A reference measurement optical path is designed in this measurement method.Both the reference optical path and measuring optical path change with environmental change.More accurate analyte methane gas volume fraction can be derived by the comparison of reference optical path with measuring optical path.