Analysis and Experimental Study of Inner Stress for Metallized Fiber Bragg Gratings

Haoyang, 皮浩洋 Pi; Qiong, 刘琼 Liu; Qing, 叶青 Ye; Guofeng, 辛国锋 Xin; Haiwen, 蔡海文 Cai; Ronghui, 瞿荣辉 Qu; Zujie, 方祖捷 Fang

doi:10.3788/cjl201239.0305008

Cited by 2 publications

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“…Since the advent of fiber Bragg array sensors in 1978, they have attracted a lot of attention in the research of intelligent sensing technology because of their simple structure, small size, low cost, strong noise immunity, corrosion resistance, high measurement accuracy and easy adhesion [12]. When monitoring civil structures, they can be embedded and installed inside or on the surface of concrete, steel, wood and other structural materials [13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Application of the method of measuring deformation parameters under mechanical action on concrete beams using a fiber Bragg grating

Kadirbayeva,

Chezhimbayeva,

Khizirova

et al. 2023

EEJET

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In order to study the patterns of deformation and change of concrete structures, studies of the fiber Bragg lattice in the form of a measuring sensor were carried out. Fiber optic sensors have several advantages: small size, resistance to electromagnetic interference, high sensitivity, wide range, simple structure, high reaction rate, corrosion resistance, geometrically versatile and resistant to external influences. This work is related to the development of the characteristics and behavior of strain sensors acting on a fiber Bragg lattice using computer modeling. The work focuses on the analysis of the operational characteristics and behavior of strain sensors acting on the fiber Bragg lattice. The sensor is used to measure the deformation of an object whose resistance varies depending on the applied force. This is shown by an example of how a fiber Bragg lattice can demonstrate strain sensors. In the work, a simulation was carried out using a computer program to simulate the operation of a fiber Bragg lattice deformation sensor. When measuring the deformation, calculations with the Young's modulus formulas were used for a more accurate calculation of the data. When measured, the wavelength left from 1662 nm to 1666 nm, as well as a constant temperature from 20 °C to 40 °C. The results show the following, the values of the Young's modulus are 23.25 Pa, the Poisson's ratio is 0.167 br, the modulus of elasticity at shear is 9.96444 Pa. And in this regard, the results of this work show: the first is that changes in the magnitude, position and shape of the deformation can reflect the dynamic evolutionary process of deformation during bending on the structure. The following is the deformation curve has a good corresponding relationship with the change in the applied pressure, which shows software modeling in different types of deformation. The conclusion shows that the technology of monitoring fiber-Bragg lattice sensors has a good effect on internal deformation and control of mechanical stresses during model tests; it provides new methods and monitoring tools for model tests

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Application of the method of measuring deformation parameters under mechanical action on concrete beams using a fiber Bragg grating

Kadirbayeva,

Chezhimbayeva,

Khizirova

et al. 2023

EEJET

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“…杨氏模量是描述固体材料弹性性质和抗形变能力的重要物理量，反映了材料形变与内应力之间的关系，是衡量材料受力之后形变大小的参数之一，也是工程技术中机械构件选材时的重要依据。测量常用固体材料(如：金属、陶瓷、橡胶、聚合物等)的杨氏模量对大型土木工程具有十分重要的作用。测量杨氏模量的方法很多,如静态拉伸法 [1] ，梁弯曲法和动力共振法 [2] 等，前两种测量杨氏模量方法是最常用的测量方法，这两种方法测量的关键在于如何精确测量微小形变量和微位移量，为此人们提出了用电耦合器件(CCD)成像系统测杨氏模量 [3] ，用霍尔位置传感器测杨氏模量 [4] 和拉伸光杠杆法 [5] 等。在实际实验测量中，这些方法测量的精度有限或实验条件难以完全满足测量原理的要求，因此研究测量简单、精度高及适用范围广的方法具收稿日期: 2015-09-29; 收到修改稿日期: 2015-11-18; 网络出版日期: 2016-03-11 蚀，测量准确度高，易于粘贴附着等优点，在智能传感技术研究中倍受关注 [6] 。在土木结构监测中，可以将它嵌入安装在混凝土，钢，木材和其他结构材料的内部或者表面 [7] 。目前 FBG 传感器广泛用于对应变 [8] 、应力 [9] 、温度 [10] 、频率 [11] 、横向压力 [12] 、折射率 [13] 、加速度 [14] 、曲率 [15] 和电流 [16] 等参数进行静态或动态的精确测量方面，其最大的特点就是对微位移测量具有很高的灵敏度和测量精度 [17] 。针对现有的利用光纤传感器来测量梁的微位移的方法 [18] ，本文提出了一种基于 FBG 传感器测量金属梁…”

Section: 引言unclassified

Young′s Modulus Measurement of Metal Beams Based on Fiber Bragg Grating

Wenwen¹,

Juan²,

Li³

et al. 2016

激光与光电子学进展

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A novel technique for measuring Young′s modulus of metal beams based on fiber Bragg gratings (FGBs) and three-point bend test is proposed. The FBG is sticked on the target metal beam and the three-point bend test method is used to load the force on the sheet. A universal formula for measuring Young′s modulus of various sheetshaped solid materials is derived, which is used for the experimental measurement of the Young′s modulus of iron and copper sheets. Experimental results show that the measurement errors of the two metal beams are 0.5% and 0.6% comparing to the nominal Young′s modulus, and the relationship between the reflected central wavelength and the loaded force is a good linearity. Moreover, the stick location of FBG has a negligible impact on the measurement precision. The proposed method has a potential application prospect in the field of Young′s modulus measurement of solid materials.

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Analysis and Experimental Study of Inner Stress for Metallized Fiber Bragg Gratings

Cited by 2 publications

References 0 publications

Application of the method of measuring deformation parameters under mechanical action on concrete beams using a fiber Bragg grating

Application of the method of measuring deformation parameters under mechanical action on concrete beams using a fiber Bragg grating

Young′s Modulus Measurement of Metal Beams Based on Fiber Bragg Grating

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