Experimental Investigation of Static Pressure Characteristics of FBG Differential Pressure Flow Sensor
On the basis of FBG (Fiber Bragg Grating) sensor principle analysis, a differential pressure flow sensor using FBG has been designed. The static pressure characteristics of the sensor were experimental studied by the hydraulic pressure calibrator and Q8384 spectrometer, and the experimental result errors were analyzed. Experimental results show that, the sensitivity coefficient of FBG is 3 pm/KPa in the differential pressure range of 0~0.35 MPa. The changes of Bragg wavelength with the pressure changes showing a good linear relationship and repetitive, and the hysteresis phenomenon is minor, which can be used for flow measurement of hydraulic system in special areas.
Prasad Yarlagadda and Yun-Hae Kim
C. T. Liu et al., "Experimental Investigation of Static Pressure Characteristics of FBG Differential Pressure Flow Sensor", Applied Mechanics and Materials, Vols. 336-338, pp. 134-138, 2013