A Method to Detect the Mixed Petrol Interface by Refractive Index Measurement With a Fiber-Optic SPR Sensor

A method based on fiber-optic surface plasmon resonance (FO-SPR) to detect mixed petrol is proposed to realize real-time, rapid monitoring of the mixed petrol interface in transportation pipelines. When the sensing region of the FO-SPR sensor was immersed in the petrol sample, the mixed petrol could be detected by measuring the refractive index of the petrol, which responds to the resonance wavelength in the SPR curve. Numerical simulation was performed according to the optical fiber theory and the SPR principle to optimize the structural parameters of the sensor. The optimized sensor can reflect small changes of the refractive index for mixed petrol detection. Next, the end-reflection FO-SPR sensor was designed and fabricated. The fiber was rotated in addition to the revolution of the coating disc to realize a uniform coating of the circumferential surface of the fiber core during vacuum coating. A wavelength modulation optical measurement system with the FO-SPR sensor was constructed. Petrol 90#, Petrol 93#, Petrol 97#, and their mixtures were measured. The experimental results indicated that this method could detect different mixing ratios of petrol with good repeatability, which lays the technical foundation for fast and accurate online detection of the mixed petrol interface in transportation pipelines.

[1]  S. Boo,et al.  Development of Au Nano-particles Cladding-doped Optical Fiber for Surface Plasmon Resonance Sensor Applications , 2012 .

[2]  B. D. Gupta,et al.  Fiber-Optic Sensors Based on Surface Plasmon Resonance: A Comprehensive Review , 2007, IEEE Sensors Journal.

[3]  Wang Hai-feng.  An Analysis of Some Methods for Oil Density on - line Measurement , 2004 .

[4]  James E. Amonette,et al.  Detection of trace levels of water in oil by photoacoustic spectroscopy , 2001 .

[5]  Priyabrata Pattnaik,et al.  Surface plasmon resonance , 2005, Applied biochemistry and biotechnology.

[6]  Banshi D. Gupta,et al.  Surface Plasmon Resonance Based Fiber Optic Sensors , 2012 .

[7]  P. V. D. Merwe.  Surface plasmon resonance , 2002 .

[8]  Lenan Wu,et al.  Distributed optical fiber surface plasmon resonance sensors , 2006 .

[9]  P. Marriott,et al.  Multidimensional gas chromatography of oxidative degradation products in algae-derived fuel oil samples using narrow heartcuts and rapid cycle times. , 2012, Journal of chromatography. A.

[10]  Banshi D. Gupta,et al.  Surface Plasmon Resonance-Based Fiber Optic Sensors: Principle, Probe Designs, and Some Applications , 2009, J. Sensors.

[11]  Akira Baba,et al.  Resonance shifts in SPR curves of nonabsorbing, weakly absorbing, and strongly absorbing dielectrics , 2005 .

[12]  L. Manojlovic,et al.  Experimental and simulation analysis of fiber-optic refractive index sensor based on numerical aperture , 2012, 2012 20th Telecommunications Forum (TELFOR).

[13]  Chen Baodong.  A Study on the Product Oil Contamination Caused by Batching Transportation , 2007 .

[14]  Banshi D. Gupta,et al.  On the sensitivity and signal to noise ratio of a step-index fiber optic surface plasmon resonance sensor with bimetallic layers , 2005 .

[15]  A. Barczak,et al.  Study of a Copper Capacitive Mems as a Sensor for Automotive Fuel Evaluation , 2012 .