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SmartScan FBG Interrogator Features and Benefits

SmartScan FBG Interrogator Features and Benefits. SmartScan Description. SmartScan is a dynamic interrogator for use with fibre Bragg grating (FBG) sensors. SmartScan Operation.

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SmartScan FBG Interrogator Features and Benefits

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  1. SmartScan FBG Interrogator Features and Benefits

  2. SmartScan Description • SmartScan is a dynamic interrogator for use with fibre Bragg grating (FBG) sensors

  3. SmartScan Operation It contains an electronically tuneable laser which emits light at 400 discrete wavelengths across a 40 nm bandwidth on multiple fibres

  4. SmartScan Operation Optical detectors inside SmartScan then measure the light reflected from each fibre at each of the 400 laser wavelengths, so building up a spectrum of the connected FBGs

  5. Zooming in on one FBG shows the laser tuning points (seen as dots)

  6. SmartScan Operation • The peak wavelength of every connected FBG is calculated by SmartScan’s high-speed electronics at the instrument sample rate of 2.5 kHz. • This allows dynamic events to be captured…

  7. A dynamic strain event sampled at 2.5 kHz

  8. SmartScan Unique Selling Points Robustness: • SmartScan’s light source is a widelytuneable semiconductor laser withthe active optical elements contained in a tiny monolithic chip, just a few millimetres long. All other components are passive optical and electronic components. This makes SmartScan very robust and more tolerant of thermal and mechanical influences than swept laser or spectrometer based instruments. • The instrumentation has demonstrated its robustness in several military flight trials…

  9. SmartScan Unique Selling Points Robustness: • A SmartScan variant was prepared for flight trials, and passed the following pre-flight ground tests:

  10. SmartScan Unique Selling Points Robustness: • It then successfully completed a series of high and low altitude flights on a BAe Systems Hawk, and was assessed to have reached a technology readiness level of 7 out of 9

  11. SmartScan Unique Selling Points Robustness: • The mean time before failure (MTBF) prediction of the current, commercial grade SmartScan is given below: • Future, enhanced environment variants are expected to offer extended MTBF By parts count reliability method per MIL_HDBK_217F

  12. SmartScan Unique Selling Points Speed: • SmartScan’s agile laser and custom tuning circuits allow data rates of 25 kHz for sequentially sampled FBGs. This makes high speed vibration and other such analyses possible with optical sensors.

  13. SmartScan Unique Selling Points Resolution: • SmartScan delivers sub-picometer resolution per sample at 2.5 kHz. This allows over-sampling and averaging to give extraordinary resolution. Source data (6 MB) available to download

  14. SmartScan Unique Selling Points Dynamic range: • SmartScan’s laser has a high output power, giving a 39 dB dynamic range which allows it to interrogate sensors tens of km away (for instance in a deep subsea well). • Sensor attenuation within this dynamic range is compensated by 9x3dB gain stages which are automatically set by the instrument. • Uniquely, SmartScan offers automatic per-sensor gain, such that if one or more sensors on a fibre suffer attenuation, they are individually amplified without affecting the other sensor gain settings

  15. SmartScan Summary Below are the current SmartScan capabilities:

  16. SmartScan Development Roadmap Below are future capabilities planned on the SmartScan development roadmap:

  17. End Thank you for your attention

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