Influence of carrier on distributed optical fiber leak detection systems

ZHAO Hong; HANG Li-jun; LI Gang

doi:10.3969/j.issn.1001-3806.2010.01.009

To detect pipeline leakage and locate leakage point in real-time,a long distance distributed optical fiber sensor based on interferometer principle was introduced to detect leak signals dynamically. The measuring principle and the leaking source locating method for the detection system were analyzed, and an experiment was designed to study the influence of the carrier on the performance of the system. It is observed from the experiment results that the sensor can obtain optimal performance when the absolute value of one order Bessel is max; the leak signal can not be detected when the absolute value of one order Bessel is far less than the max. The results verify that the sensor can locate the leaking source accurately when the optimal carrier parameters are selected,and the positioning error is 0.99%.

Influence of carrier on distributed optical fiber leak detection systems

Corresponding author: LI Gang, lig@bjut.edu.cn

1. Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China;

2. Beijing Glass Research Institute, Beijing 100111, China

Received Date: 2008-11-26

Accepted Date: 2009-03-16

Available Online: 2010-01-25

Abstract: To detect pipeline leakage and locate leakage point in real-time,a long distance distributed optical fiber sensor based on interferometer principle was introduced to detect leak signals dynamically. The measuring principle and the leaking source locating method for the detection system were analyzed, and an experiment was designed to study the influence of the carrier on the performance of the system. It is observed from the experiment results that the sensor can obtain optimal performance when the absolute value of one order Bessel is max; the leak signal can not be detected when the absolute value of one order Bessel is far less than the max. The results verify that the sensor can locate the leaking source accurately when the optimal carrier parameters are selected,and the positioning error is 0.99%.

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Reference (13)

[1]	YU D K,QIAO X G,JIA Zh A,et al.The fiber Bragg grating temperature and pressure sensing system applied in oil pipeline[J].Laser Technology,2007,31(1):12-14(in Chinese).
[2]	FUCHS H V,RIEHLE R.Ten years of experience with leak detection by acoustic signal analysis[J].Applied Acoustic,1999,33(1):1-19.
[3]	CHEN H B,TU Y Q.Summary of leak detection methods for oil pipeline[J].Pipiline Technique and Equipment,2000,22(1):38-41.
[4]	BUCARO J A,HICKMAN T R.Measurement of sensitivity of optical fibers for acoustic detection[J].Appl Opt,1979,18(6):938-940.
[5]	NIKLES M,VOGEL B,BRIFFOD F,et al.Leakage detection using fiber optics distributed temperature monitoring[J].SPIE,2004,5384:18-25.
[6]	CAI D S,DAI H Ch,CAI Sh D,et al.Monitoring the temperature in concrete structure of three gorges dam by using distributed optical fiber sensor[J].Journal of Hydraulic Engineering,2003,34(5):88-91(in Chinese).
[7]	MENDOZA M,CARRILLO A,MRQUEZ A.New distributed optical sensor for detection and localization of liquid hydrocarbons part Ⅱ:optimization of the elastomer performance[J].Sensors and Actuators,2004,A111 (2/3):154-165.
[8]	WANG Y N,ZHAO Y L,JIANG Zh D,et al.Study on the distributed optical fiber sensor for long-distance natural gas pipeline leakage[J].Journal of Xi'an Jiaotong University,2003,37(9):933-936(in Chinese).
[9]	TAPANES E.Dual-purpose fibre optic system providing simultaneous,real-time communication and distributed vibration sensing for pipeline applications[C]//International Pipeline Conference.Calgary:American Society of Mechanical Engineers,1998:103-110.
[10]	JAFFREY D,LUBBERS J,KING B,et al.An effective and proven technique for continuous detection and location of third party interreference along pipeline[C]//Proceedings of the 4th International Pipeline Conference.Core,Canada:American Society of Mechanical Engineers,2002:947-952.
[11]	ZHOU Y,JIN Sh J,ZHANG Y Ch,et al.Study on the distributed optical fiber sensing technology for pipeline leakage detection[J].Journal of Optoelectronics·Laser,2005,16(8):935-938(in Chinese).
[12]	KURMER J P,KINGSLEY S A,LAUDO J S,et al.Distributed fiber optic acoustic sensor for leak detection[J].SPIE,1991,1586:117-128.
[13]	WASSEF W A,BASSIM M N,HOUSSNY-EMAM M.Acoustic emission spectra due to leaks from circular holes and rectangular slits[J].J Acoust Soc Amer,1985,77(3):916-923.

Influence of carrier on distributed optical fiber leak detection systems

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References

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