title: Measurement error of surface-mounted fiber Bragg grating temperature sensor.
abstract: Fiber Bragg grating (FBG) sensors are extensively used to measure surface temperatures. However, the temperature gradient effect of a surface-mounted FBG sensor is often overlooked. A surface-type temperature standard setup was prepared in this study to investigate the measurement errors of FBG temperature sensors. Experimental results show that the measurement error of a bare fiber sensor has an obvious linear relationship with surface temperature, with the largest error achieved at 8.1 °C. Sensors packaged with heat conduction grease generate smaller measurement errors than do bare FBG sensors and commercial thermal resistors. Thus, high-quality packaged methods and proper modes of fixation can effectively improve the accuracy of FBG sensors in measuring surface temperatures.
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, People's Republic of China.
authors.forename: Liu
authors.initials: L
authors.lastname: Yi
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, People's Republic of China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Zude
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, People's Republic of China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Erlong
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, People's Republic of China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Jun
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, People's Republic of China.
authors.forename: Tan
authors.initials: T
authors.lastname: Yuegang
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, People's Republic of China.
authors.forename: Liu
authors.initials: L
authors.lastname: Mingyao