Optical Sensor of Thermal Gas Flow Based on Fiber Bragg Grating

Optical Sensor of Thermal Gas Flow Based on Fiber Bragg Grating

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 designe...

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Bibliographic Details
Main Authors: Xu Jiang, Keda Wang, Junqing Li, Hui Zhan, Zhenan Song, Guohang Che, Guohui Lyu
Format: Article
Language:English
Published: MDPI AG 2017-02-01
Series:Sensors
Subjects:
fiber Bragg grating
heat flow sensor
constant power method
light absorbing coating
Online Access:http://www.mdpi.com/1424-8220/17/2/374
Description
Summary: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.
ISSN:1424-8220

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