Research Of The Emulsion Concentration Sensor Based On Fiber Grating

Emulsion is a hydraulic support's transmission medium and its concentration directly affects the working life and cost of the hydraulic support and the pillar.so strict testing for emulsion concentration is necessary. Aiming to the common methods of the emulsion concentration detection and development current situation of the fiber grating refractive index sensing technology at home and abroad. This paper put forward a new method of detecting the emulsion concentration by the fiber grating, we study the influence of the long period fiber grating parameter on the transmission spectrum by the coupling mode theory, analyze the refractive index sensitivity characteristics of it, test sensing characteristics with different emulsion concentration and get the relationship between the resonance wavelength and the concentration. Test results show that it is practical to detect emulsion concentration for the fiber grating. which can meet the sensitivity. It is fit to apply under abominable environment such as strong electromagnetic to interfere, flammable,combustible and corrosive medium, and polluted dust.