A motor%26apos;s rotational angle sensor based on fiber Bragg grating

作者：Cheng Chin Hsing^*; Hung Sung Chen; Liu Wen Fung

来源：Microwave and Optical Technology Letters, 2014, 56(6): 1449-1452.

DOI：10.1002/mop.28359

• potentiometer
• motor%26apos
• s rotational angle sensor
• piezo-electrical transducer
• fiber Bragg grating

This article develops an optical fiber sensor using a fiber Bragg grating (FBG) and a piezo-electrical transducer (PZT) to measure a motor%26apos;s rotational angle. By mounting an FBG on a PZT bar, a dynamic strain simulator was constructed. The equivalent voltage produced by the potentiometer caused by the rotational angle of a motor%26apos;s shaft was applied to the PZT and converted to the dynamic variation of the FBG Bragg wavelength. The motor%26apos;s rotational angle was attained by measuring the changing value of the wavelength. The experimental results demonstrate that a high sensitivity of 0.459 pm/deg is achieved over a range of 0 degrees to 270 degrees.

• 出版日期2014-6