Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7122704 | Measurement | 2016 | 8 Pages |
Abstract
We demonstrate a simultaneous distributed strain and temperature measurement technique with the spatial resolution of 1 mm using fiber Bragg gratings inscribed in a polarization-maintaining and absorption-reducing fiber (PANDA-FBGs) and optical frequency domain reflectometry (OFDR). We conduct four-point bending tests in an environmental chamber. Using high birefringent PANDA-FBGs that are manufactured specifically for the simultaneous measurements, the uniform temperature distributions and the typical strain distribution profiles of the four-point bending tests were successfully obtained. The measurement errors of strain were from â31 με to 19 με, and of temperature were from â0.9 °C to 1.3 °C. The spatial standard deviation was 7.5 με and 0.9 °C. We also discussed the effect of the residual strain of the sensor-bonding procedures and the data averaging.
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Physical Sciences and Engineering
Engineering
Control and Systems Engineering
Authors
Daichi Wada, Hirotaka Igawa, Hideaki Murayama,