A high sensitive fiber-optic strain sensor with tunable temperature sensitivity for temperature-compensation measurement
Abstract
A high sensitive fiber-optic strain sensor, which consists of a cantilever, a tandem rod and a fiber collimator, was proposed. The tandem rod, which transfer the applied strain to the cantilever, was used for tuning the temperature sensitivity from -0.15 to 0.19 dB/°C via changing the length ratio of the rods. Moreover, due to the small beam divergence of the collimator, high strain sensitivity can be realized via incident-angle sensitive detection-mechanism. A strain detection-range of 1.1 × 103 μɛ (with a sensing length of 21.5 mm), a detection limit of 5.7 × 10-3 μɛ, and a maximum operating frequency of 1.18 KHz were demonstrated. This sensor is promising for compensating the thermal-expansion of various target objects.
- Publication:
-
Scientific Reports
- Pub Date:
- February 2017
- DOI:
- 10.1038/srep42430
- Bibcode:
- 2017NatSR...742430H