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Technological Study on Fiber Fabry Perot Strain Sensor Demodulated by Tunable Fabry Perot

Author: SunJiYong
Tutor: ChenWeiMin
School: Chongqing University
Course: Precision instruments and machinery
Keywords: Fiber Fabry-Perot cavity Fabry-Perot strain sensor Related Tunable Fabry-Perot filter
CLC: TP212
Type: Master's thesis
Year: 2002
Downloads: 214
Quote: 3
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Abstract


With the rapid development of society , the infrastructure has been continuously improved . Large buildings and facilities play an increasingly important role in people's daily lives , so to monitor the security situation , it is very necessary to ensure their safety . Fiber Fabry-Perot strain sensor as a novel strain sensor in the safety monitoring of large facilities with attractive market prospects and value . But based spectrometer demodulation of fiber Fabry-Perot strain sensor system is relatively expensive price limits its application and promotion of the actual safety monitoring . This paper first describes the optical fiber Fabry-Perot strain sensor measuring principle, the analysis of the actual situation of the fiber Fabry-Perot strain sensor and an ideal case differences, and these differences influence on the sensor . Then the wavelength selective nature of the departure from the Fabry-Perot interferometer , double Fabry-Perot series model system output light intensity characteristics . Studied the relationship between the two Fabry-Perot for reflection - reflection , connection and reflection - transmission connection , double Fabry-Perot series system output light intensity between the two Fabry-Perot cavity , on this basis , a detailed analysis of the based on the adjustable Fabry-Perot demodulation fiber Fabry-Perot strain sensor measuring principle based on tunable Fabry-Perot filter demodulation of fiber Fabry-Perot strain sensor measuring principle . By comparison of two fiber optic strain sensor system based on tunable Fabry-Perot demodulation discuss their advantages and disadvantages , their actual feasibility analysis . Design a tunable fiber Fabry-Perot filter control based on the piezoelectric film , a detailed analysis of the production process of the tunable filters , tunable filter Fabry-Perot cavity length voltage-dependent characteristics experimentally verified . Concluded that the tunable Fabry-Perot filter to demodulate a fiber Fabry-Perot strain sensor cavity length and strain , thereby reducing the cost of measurement of the optical fiber Fabry-Perot strain sensing system , improve the cost

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