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Research on Sensing Signal Demodulation System Based on ARM Technology for Fiber Bragg Grating

Author: WuChunHui
Tutor: ZhangYing
School: Yanshan University
Course: Measuring Technology and Instruments
Keywords: Fiber Bragg grating Match demodulation method ARM Strain Izod
CLC: TP212.14
Type: Master's thesis
Year: 2011
Downloads: 61
Quote: 0
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Abstract


Fiber Bragg grating sensor ( FBG ) has good electrical insulation, anti-electromagnetic interference , high-resolution , corrosion resistance and other types of sensors incomparable advantages in the fields of aviation , civil engineering, electric power , petroleum , medical plays its unique the advantages of fiber Bragg grating sensor increasing attention has been paid . Many research institutions at home and abroad made ??a variety of FBG sensing signal demodulation scheme , but from the practical as well as a certain distance . In response to this situation , the paper design based on ARM microcontroller and matching grating technology FBG strain sensing signal demodulation system . The main content of this paper : FBG sensors in recent years in the practical application of engineering and a brief description , and several typical FBG sensing signal demodulation techniques . FBG sensor strain sensing principle , on the basis of FBG strain sensing cantilever - based demodulation scheme designed cantilever demodulation part , and gives the strain sensing principle is demonstrated the feasibility of the scheme . The cantilever tuning test apparatus driven by the stepper motor , stepper motor linear relationship between the rotation number of steps matching the amount of change of the Bragg grating wavelength curve . Is designed based on ARM microcontroller and matching grating technology FBG strain sensor signal demodulation system , including strain sensing system optical design and photo detector , amplified and filtered , stepper motor control , LCD display and USB interface hardware circuit part of the design ; use uC / OS - II operating system manage scheduling multiple applications on the microcontroller , to improve the reliability and stability of the system operation ; using LabVIEW software on the the strain sensing data is sent to the host computer for analysis and calculation , and strain demodulation result . The experimental results verify the feasibility of the design of the FBG sensing signal demodulation scheme .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Physical sensors > Light sensor
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