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Frontiers of Mechanical Engineering

Front Mech Eng Chin    2009, Vol. 4 Issue (1) : 5-14     https://doi.org/10.1007/s11465-009-0011-3
RESEARCH ARTICLE |
Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating sensor
Zude ZHOU(), Desheng JIANG, Quan LIU
President’s office of Wuhan University of Technology, Wuhan 430070, China
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Abstract

This paper introduces fiber Bragg grating (FBG) based on a fiber optic grating sensor developed to be embedded on mechanical equipment for digital monitoring and health diagnosis. The theoretical and experimental researches on the new-style FBG sensor (FBGS) technology, high-speed demodulation, and data transmission are discussed. The transmission characteristics between the FBG and the detection interface, modeling and compensation method for online distributed multi-parameter digital monitoring and methods for data processing, synchronous sampling, and long-term dynamic digital monitoring using embedded technology are also presented. The acquired information by an FBGS can be used for the optimization of maintenance schedules and refinement of mechanical equipment design. It is a challenge to gather real-time data from components working at high speed and in a severe environment of high temperature, high pressure, and high rotation speed. Currently, there are no sensors or technologies available for digital monitoring and health diagnosis under this rigorous situation for use in mechanical engineering operation safety. As a result, this paper introduces an online distributed and integrated digital monitoring system and health diagnosis. The new principle and new method will contribute to modern measurements in science and technology, mechanical engineering, and large mechanical equipment operation safety.

Keywords fiber Bragg grating sensor (FBGS)      mechanical equipment operation safety      embedded technology      high-speed demodulation      digital monitoring      health diagnosis     
Corresponding Authors: ZHOU Zude,Email:zudezhou@whut.edu.cn   
Issue Date: 05 March 2009
 Cite this article:   
Zude ZHOU,Desheng JIANG,Quan LIU. Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating sensor[J]. Front Mech Eng Chin, 2009, 4(1): 5-14.
 URL:  
http://journal.hep.com.cn/fme/EN/10.1007/s11465-009-0011-3
http://journal.hep.com.cn/fme/EN/Y2009/V4/I1/5
Fig.1  Relationship curve of refractive index and exposure time under non hydrogen-loading
Fig.2  Relationship curve of refractive index and exposure time under hydrogen-loading
Fig.3  Temperature property of adulteration fiber FBG sensor
Fig.4  Embedding FBG strain sensor structure
Fig.5  FBG and capillary stainless steel tube combined to form FBGS
Fig.6  Structure of plaster FBGS
Fig.7  Structure of multi-channel, multi-point FBG embedded high-speed demodulation system
Fig.8  Communication interface standard between each subsystem
Fig.9  Structure model of 65 t quay container crane
Fig.10  Sensors collocation diagram
Fig.11  Seaside left door leg strain vary diagram
Fig.12  Behind crossbeam down edge strain vary diagram
Fig.13  Embedded FBGS force transducer
Fig.14  Magnetic flux lines of magnetic bearing and transducer
Fig.15  Health diagnosis system for large mechanical equipment
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