摘要光纤光栅是一种无缘滤波器件，它凭借体积小、波长选择性好、抗电磁干扰、电绝缘性能好、耐腐蚀等等众多优点，被广泛应用于土木及水利工程、桥梁和公路安全监测、航天航空及机械设计等多个领域的应变测量之中。近年来，随着在诸多领域中的应用成果日益增多，光纤光栅成为了最具发展前途、最具代表性和发展最为迅速的光纤无缘器件之一。

为验证光纤光栅应变测量的可行性与有效性，本文设计并进行了等强度悬臂梁实验，分别将光纤布拉格光栅、电阻应变片和基于散斑图像的测试数据与理论计算值进行对比，以验证光纤光栅应变测量的有效性。本文介绍了应变测量的背景、目的和意义，并对国内外研究状况进行了深入的分析；设计并进行了悬臂梁实验，分析比较了各测量方法的结果；最后，通过理论分析得出温度变化对应变测量的影响，通过物理方法或改变实验结构进行温度分离和补偿。73269

毕业论文关键词  光纤布拉格光栅，应变测试，电阻应变片，等强度悬臂梁实验，温度分离和补偿

毕业设计说明书外文摘要

Title   The Research of Strain Measurement Based on Fiber Bragg Gratings 

Abstract A fiber Bragg grating is a kind of no filter, with its small size, good selectivity wavelength, electromagnetic interference resistance, good electrical insulating properties, corrosion resistance and so on many virtues, are widely used in civil and hydraulic engineering, bridge and road safety monitoring, aerospace and mechanical design, and other fields of strain measurement。 In recent years, as more and more, the application results in many fields, fiber grating has become the most promising, the most representative and one of the most rapidly developing optical fiber for the device。

To test and verify the feasibility and effectiveness of fiber Bragg grating strain measurement, this paper introduced the equal strength cantilever beam design and experiment, respectively, resistance strain gauge and fiber Bragg grating based on test data of speckle image compared with the theoretical calculation value, to verify the effectiveness of the fiber Bragg grating strain measurement。 This paper introduces the background, purpose and significance of strain measurement, and the research status at home and abroad was analyzed; Cantilever beam has been designed and the experiment and analysis of various measurement methods compared the results; Finally, through theoretical analysis it is concluded that the influence of temperature change on the strain measurement, by physical method or the changing structure of the experimental temperature separation and compensation。

Keywords  Fiber Bragg Grating,strain test,resistance strain gage,equal strength cantilever beam, Temperature separation and compensation

目   次

1  绪论 3

1。1  研究背景 3

1。2  研究目的和意义 4

1。3  国内外研究状况 4

1。3。1  国外研究状况 4

1。3。2  国内研究状况 5

1。4  本文的主要内容和结构 5

2  基于光纤光栅传感的理论研究 7

2。1  引言