Modelling and simulation of a fibre Bragg grating strain sensor based on a magnetostrictive actuator principle
Modelling and simulation of a fibre Bragg grating strain sensor based on a magnetostrictive actuator principle
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基于磁致伸缩致动器原理的光纤布拉格光栅应变传感器建模与仿真
DOI：
10.1117/12.2224728
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发表时间：
--
期刊：
影响因子：
--
通讯作者：
U. Beck
中科院分区：
文献类型：
--
作者：
V. Schukar;X. Gong;D. Hofmann;F. Basedau;E. Köppe;M. Bartholmai;A. Westphal;M. Sahre;U. Beck
提出了一种新的嵌入式光纤布拉格光栅（FBG）应变传感器自诊断的概念，并进行了仿真和实验测试。该概念基于直接涂覆在FBG传感器的光栅段上的光纤包层上的磁致伸缩金属层，使得毫特斯拉尺度的按需外部磁场可以产生可控的人工应变作为远程光学传感器的指示信号。预定义的磁场和其诱导的布拉格波长偏移之间的关系表征了该验证概念。界面的局部结合状态与初始状态的任何偏差或/和从复合材料基体到光纤芯的剪切应变传递机制的任何变化将导致这种敏感关系的改变，从而触发进一步检查的立即警报。有限元方法被用来模拟这种配置的应变作为结果的不同值的磁场，以优化传感器的几何参数。仿真结果与实验结果相吻合。
A new concept for the self-diagnosis of embedded fiber Bragg grating (FBG) strain sensors was developed, simulated and experimentally tested. This concept is based on a magnetostrictive metallic layer directly coated on the fibre cladding over the grating segment of the FBG sensor, so that an on-demand external magnetic field in a millitesla scale can produce a controllable artificial strain as an indication signal for the remote optical interrogator. The relationship between the pre-defined magnetic field and its induced Bragg wavelength shift characterizes this validation concept. Any deviation of the local bonding state of the interfaces from the initial or/and any change of shear strain transferring mechanism from composite matrix to the optical fibre core will result in alterations in this sensitive relationship, and thus triggers an immediate alert for a further inspection. The finite element method is used to simulate the strain of this configuration as result of different values of the magnetic field in order to optimize the geometrical sensor parameters. The simulations are verified by experiments results.
模具磁致伸缩。
DOI：
10.1007/bf01328650
发表时间：
1928
期刊：
Zeitschrift für Physik
影响因子：
--
作者：
A. Schulze
通讯作者：
A. Schulze