Research on Spectrum Domain White Light Interference Demodulation Mechanism of the Optical Fiber Sensing Coal Gas
In our country, as the great threat caused by gas explosion or gas accident to the safety in coal mine production, the development of gas monitoring system is key to preventing accidents beforehand.. Putted into interferometer, the amplitude and the intensity of the incident ray carrying the information of gas concentration are divided many times by reflection and transmission, which results in many parallel beams in the form of the reflected light and the transmitted light. The concentration of the gas can be obtained by testing the light intensity signal . The experiment results show that an accurate measurement result which is capable for the gas concentration test in underground abominable conditions can be got by this mean. Particularly, based on multiplexing technique of optical fiber sensing, it is easy to build a sensor network. This method has an important significance and a good prospect of application and extension for gas monitoring and safety production in the coal mine.
M. R. Zhou et al., "Research on Spectrum Domain White Light Interference Demodulation Mechanism of the Optical Fiber Sensing Coal Gas", Applied Mechanics and Materials, Vols. 229-231, pp. 1132-1135, 2012