title: Optical Sensor of Thermal Gas Flow Based on Fiber Bragg Grating.
abstract: This paper aims at solving the problem of explosion proof in measurement of thermal gas flow using electronic sensor by presenting a new type of flow sensor by optical fiber heating. A measuring unit based on fiber Bragg grating (FBG) for fluid temperature and a unit for heat dissipation are designed to replace the traditional electronic sensors. The light in C band from the amplified spontaneous emission (ASE) light source is split, with one part used to heat the absorbing coating and the other part used in the signal processing unit. In the heating unit, an absorbing coating is introduced to replace the traditional resistance heating module to minimize the risk of explosion. The measurement results demonstrate a fine consistency between the flow and temperature difference in simulation. The method to enhance the measurement resolution of flow is also discussed.
authors.affiliation: College of Information Science and Technology, Heilongjiang University, Harbin 150080, China. 1995042@hlju.edu.cn.
authors.forename: Xu
authors.initials: X
authors.lastname: Jiang
authors.affiliation: Research Center for Fiber Optic Sensing Technology National Local Joint Engineering, Electronic Engineering College, Heilongjiang University, Harbin 150080, China. 2151243@s.hlju.edu.cn.
authors.forename: Keda
authors.initials: K
authors.lastname: Wang
authors.affiliation: Physics Department, Harbin Institute of Technology, Harbin 150001, China. jqli@hit.edu.cn.
authors.forename: Junqing
authors.initials: J
authors.lastname: Li
authors.affiliation: Research Center for Fiber Optic Sensing Technology National Local Joint Engineering, Electronic Engineering College, Heilongjiang University, Harbin 150080, China. 2000092@hlju.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhan
authors.affiliation: Research Center for Fiber Optic Sensing Technology National Local Joint Engineering, Electronic Engineering College, Heilongjiang University, Harbin 150080, China. 2131232@s.hlju.edu.cn.
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Song
authors.affiliation: Research Center for Fiber Optic Sensing Technology National Local Joint Engineering, Electronic Engineering College, Heilongjiang University, Harbin 150080, China. 2131242@s.hlju.edu.cn.
authors.forename: Guohang
authors.initials: G
authors.lastname: Che
authors.affiliation: Research Center for Fiber Optic Sensing Technology National Local Joint Engineering, Electronic Engineering College, Heilongjiang University, Harbin 150080, China. lvguohui@hlju.edu.cn.
authors.forename: Guohui
authors.initials: G
authors.lastname: Lyu
keywords: constant power method; fiber Bragg grating; heat flow sensor; light absorbing coating