Conception of using a modalmetric fiber sensor with a system locating a mechanical disturbance for pipeline protection
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1 Military University Of Technology, Warsaw, Poland Institute of Optoelectronics Conception of using a modalmetric fiber sensor with a system locating a mechanical disturbance for pipeline protection Student: Mr Bartosz Podgórzak Supervisor: Lt. col. Phd. Marek Życzkowski 1
2 Failures of a Pipline 1. Related with exploitation: erosions, indentations, fractures, heterogeneit of welds. 2. Caused by a human factor oversight of a damage on the very beginning itself, renovations, earthworks, or construction works, acts of terrorism, acts of sabbotage. 2
3 Methods of detecting a damage Direct when detection is centered on the external part of the pipeline, useing specialized sensors, and a visual observation Indirect when the examination of the pipeline is made with a analysis and a measurement of the flow parameters, such as: pressure, flow and velocity of the flow 3
4 Direct methods Acoustic methode based on a detection of the noise made by leakage. The noises are being analised by the acoustic sensors. 4
5 Indirect methods Based on detection of acoustic waves, made by a leakage Based on balance of the medium leaking from the pipeline considering the accumulation Based on a mathematic model of the object rest on constant comparation of the created object with the actual object 5
6 Function of the fiber sensor system 1. Diagnose of the leakage: recognition localization (exact co ordinate position) detection 2. Alarm initiation 3. Estimation of losses 4. Resistance of disturbances (frequency of appearing false alarms) 6
7 Methods of using fiber sensors for securing pipelines Smartec FOS&S system Future Fibre Technologie Cobalt system 7
8 Our conception of modalmetric fiber sensor for pipeline security 8
9 Conception of modalmetric fiber sensor for pipeline security 9
10 Conception of modalmetric fiber sensor for pipeline security Δt [ns] 10
11 Sensor simulation perturbation singlemode fiber multimode fiber singlemode fiber losses 11
12 Sensor simulation perturbation singlemode fiber multimode fiber singlemode fiber losses 12
13 Laboratory concept set 13
14 Measurement survey P 1,3 =1,75mW P 1,5 =1,05mW 13,72km P 1,3 =0,8mW P 1,5 =1,65mW 4,20km 14
15 Three diffrent kinds of disturbance 1. Thumbing 2. Scrubing 3. Pressuring 15
16 Outside concept set 16
17 Measurement survey 17
18 Five diffrent points of disturbance 18
19 SECTOR I WALKING JUMPING 19
20 SECTOR II WALKING JUMPING 20
21 SECTOR III WALKING JUMPING WALKING 21
22 SECTOR IV WALKING JUMPING 22
23 SECTOR V WALKING JUMPING 23
24 Sabotage digging With 4 diffrent places of testing 24 Military University of of Technology
25 Sabotage digging - results I II III IV 25 Military University of of Technology
26 Conclusion This fiber optic system has 50 meters accuracy of intruder localization in presented 20 km multimode sensor fiber The modalmetric sensor give information about an authorized access to the fibre Presented sensors arrangement can localize places of attacks on pipeline The sensors can be implemented in existing communication cables/networks To data transfer and monitoring can be used the same fibre 26
27 References [1] B. Griffiths, Development in and applications of fibre optic intrusion detection sensors in Proc of IEEE, 29th Annual International Conference on Security Technology, Sanderstead, 1995, [2] A.D. Kersey et al., Recent Progress in Interferometric Fibre Sensor Technology, Proc. SPiE 1367 (1990). [3] B. Chiu, M.C. Hastings, Digital demodulation for passive homodyne optical fibre interferometry based on a 3x3 coupler, Proc. SPiE 2292, (1994). [4] M. Zyczkowski, M. Szustakowski, N. Pałka, M. Kondrat, Fibre optic perimeter protection sensor with intruder localization, Proc. SPiE 5611, (2004). [5] S.J. Sammper, P.L. Swart, A.A. Chtecherbakov, Merged Sagnac-Michelson interferometer for distributed disturbance detection, JoLT 15, (1997). [6] M. Szustakowski, M. Życzkowski, Fiber optic sensors for perimeter security with intruder localization, Proc. SPiE 5954, (2005). [7] M. Kondrat, M. Szustakowski, W. Ciurapinski, M. Życzkowski, Two-interferometer fiber optic sensor with disturbance localization, Proc. of SPIE Vol (2006) [8] M.Życzkowski, M.Kondrat, W.Ciurapiński, Initial research of dual wavelenght fiber optic perimeter sensor, J.Phys. IV France, 129, (2005) 27
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