Abstract
To realize the online, rapid distinguishing of different petrol in transportation pipelines, a method based on fiber-optic surface plasmon resonance (FO-SPR) sensor is proposed. The calculation and simulation of FO-SPR end-reflection structure were carried out through fiber theoretical model and SPR principle. The impact of different parameters on sensor performance was analyzed. According to the optimized structure parameters, the FO-SPR sensor was manufactured. A wavelength modulation optical measurement system with FO-SPR sensor was established. Sample petrol of 90#, 93# and 97# and their mixture were measured. Different types of petrol were distinguished through the changes of the resonance wavelength. The experiment results showed that the measurement method could distinguish different petrol and had a good degree of distinction and repeatability. It lays the foundation for the identification of mixed product oil in transportation pipelines.
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