samer najjar fiber optic leak detection
TRANSCRIPT
Using Omnisens’ DITEST System
Samer Najjar Area Sales Manager, EMI October 4th 2011
Agenda
EMI + Omnisens
Pipelines
Technology
Omnisens DITEST
Summary
Q&A
2
Engineering & Marketing Int’l
Founded in 1992
HQ in Los Angeles, CA
Offices in Beirut, Bahrain
15 employees
Bring Latest Technology to the Middle East
SmartSignal
OSIsoft
Omnisens
3
Omnisens
Privately-owned Swiss company, established in 1999
Spin-off from Swiss Federal Institute of Technology in Lausanne
Headquarters in Morges, Switzerland
Backed by VINCI Capital since 2008
30 highly educated employees
Worldwide customer base
4
Pipelines
Critical network & Lifeline
Millions of kilometers
Various terrains
Wide range of products:
Oil
Gas
Water
Sulfur/Chemicals
5
Threats
6
Benefits of FO Leak Detection
7
Increase Profits
Environment Peace of Mind
Better Safety
Technology
8
From N pin point sensors to monitor N locations...
Multiplexed sensors
N sensors, N wires, N calibration
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...to one fiber to monitor thousands of locations
Remote sensing
One cable, one monitor
Distributed Sensing
10
Distributed sensing is based on the analysis of light scattering
Scattering originates from inhomogenities in silica
Scattering modifies the spectrum of the incident light
Brillouin, Rayleigh, Raman
11
Scattering processes used for sensing applications:
Rayleigh detection and analysis of fast intensity variations acoustic signal detection.
Raman scattered magnitude is temperature dependent
Brillouin lines are temperature and strain sensitive
Scattering medium
Laser, lo
Brillouin Distributed Sensing
12
Optical fiber
Uniform temperature
Hot spot
Analysis of the
backscattered light
Use of pulsed light enables
localization
Spectral analysis of the
scattered light provides the
Temperature and/or Strain
information
Brillouin
13
Brillouin-based distributed sensors exist in two versions:
BOTDR Brillouin Optical Time-Domain Reflectometry
BOTDR is based on the spontaneous back-scattered light (linear)
• Single fiber end access
• Requires frequency processing at the detection
• Weak signal, long averaging times
vs
BOTDA Brillouin Optical Time-Domain Analysis
BOTDA is based on the stimulated scattering of light (nonlinear)
• Two-fiber loop configuration – two fiber ends access
• Strong signal, reduced averaging times
• Longer distances capabilities and faster acquisition times
Omnisens DITEST
One single laser
Pump and probe signals generated by optical signal processing
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2008 Global Fiber Optic Sensors & Customer Value Innovation of the Year Award
Advantages of DITEST
15
One single laser source
Automatic compensation of drifts
Flexibility in the generation of optical signals (pump and probe intensity adjustments)
Enhanced signal to noise ratio
Long distance capabilities
Large optical budget (> 10dB in standard, custom unit > 20dB upon request)
Advantages of DITEST
16
Standard single-mode fibers
1550nm wavelength
Brillouin scattering – frequency-based technique – intrinsically stable
Stimulated Brillouin Scattering - BOTDA
Single laser source setup Pump and probe generated from the same laser source
Self compensation of drifts
Long-term stability
Advantages of DITEST
17
Improved Signal-to-Noise ratio – Higher Optical Budget
Performance maintained over long distances – Short acquisition time
– Long distance range >50km
– Short spatial resolution down to 1 m
– Excellent measurement resolution (0.5°C and 10mε)
Frequency-based technique – Long term stability and reliability, not sensitive to attenuation drifts or loss
Uses standard single-mode fibers
Comparison Matrix
18
Fly Walk Mass Balance Omnisens
Long range
Submarine / terrain
Quick response
Continuous 24/7
Pinpoint accuracy localization
All-terrain
No false alarms
Sensitivity
No Opex costs
Ground movement detection
Third party Intrusion detection
Pipeline long-range monitoring
Summary
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