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Self-Repairing Packaged Strain Sensor With High Repeatability

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2 Author(s)
Young Song ; Dept. of Mech. & Aerosp. Eng., North Carolina State Univ., Raleigh, NC, USA ; Peters, K.

We present experimental demonstrations of a self-repairing polymer waveguide strain sensor packaged in a polyimide capillary. The waveguide is fabricated between two multi-mode optical fibers through an ultraviolet curable resin and operates as a strain sensor by interrogation of the infrared power transmission through the waveguide. The packaging improves the performance of the sensor as compared to a previous unpackaged version, by removing previous “no-response” zones. The resulting sensor output is monotonic throughout the measurement range. The hysteresis in the sensor behavior among multiple loading cycles is also significantly reduced. A jump in the sensor output voltage is observed after the sensor self-repair process, which presents challenges for calibration of the sensor.

Published in:

Sensors Journal, IEEE  (Volume:12 ,  Issue: 12 )