Dual Bragg grating sensor for concurrent torsion and temperature measurement

作者：Swart PL^*; Chtcherbakov AA; Van Wyk AJ

来源：Measurement Science and Technology, 2006, 17(5): 1057-1064.

DOI：10.1088/0957-0233/17/5/S20

• torsion
• torque
• temperature
• Bragg gratings
• fibre sensor

The paper discusses a dual fibre Bragg grating sensor for the independent measurement of temperature and torsion in a rotating shaft. It shows theoretically that torsion affects the differential wavelength of the gratings in the proposed configuration, whereas temperature changes only the common-mode wavelength, allowing measurement of both torsion and temperature. For the particular system investigated experimentally, the differential wavelength change due to torque was 19.4 pm (N m)(-1), and the corresponding temperature sensitivity was -0.36 pm. degrees C-1. In contrast to these values, the temperature sensitivity of the common-mode wavelength change was 25.3 pm degrees C-1, and its torque cross-sensitivity was -0.19 pm (N m)(-1).

• 出版日期2006-5