A novel fibre grating gas flow sensor

This paper studies an optical fibre grating flow sensor through research and extension of “King's law” to make full use of the advantages of optical fibre sensing and to improve the shortcomings of a traditional gas flow sensor. Using the constant-current source as a heat source for this sensor and using an optical fibre grating temperature sensor for a temperature survey in the auxiliary pipe and the air pump, the pipeline's gas flow is determined though King's law. The experimental results indicate that the temperature sensor can respond quickly to the gas temperature; in addition, via conversion into a flow measurement, the results indicate that the novel natural gas flow sensor is stable and effective.