A smart "shear sensing" bolt based on FBG sensors

被引：58

作者：

Ren, Liang ^{[1
]}

Feng, Tangzheng ^{[1
]}

Ho, Michael ^{[2
]}

Jiang, Tao ^{[1
]}

Song, Gangbing ^{[2
]}

机构：

[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Liaoning, Peoples R China

[2] Univ Houston, Dept Mech Engn, Houston, TX 77004 USA

来源：

MEASUREMENT | 2018年 / 122卷

基金：

中国国家自然科学基金;

关键词：

Smart bolt; Small FBG sensor; Axial force monitoring; Shear force monitoring; Interface monitoring; BRAGG GRATING SENSORS; FORCE SENSOR; TACTILE SENSOR; FIBER; TECHNOLOGY; VIBRATION; RINGDOWN; JOINTS; BRIDGE;

D O I：

10.1016/j.measurement.2018.03.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper develops a new type of smart bolt that can simultaneously measure the axial and shear forces through the use of embedded fiber Bragg gratings (FBG) sensors. Based on the linear relationship between the equivalent bending moment and the shear force, the equation to calculate the shear force using the Bragg wavelength variation is derived. A method to design a smart bolt is presented in this paper. To enable the experimental study, a smart bolt was fabricated, calibrated, and tested. Calibration of the smart bolt reveals a linear relationship between the reflected Bragg wavelength and the applied shear forces and axial forces. The variation of the wavelengths of the embedding FBGs in different positions in the bolt was analyzed, and a model was developed to relate the FBG wavelength to axial and shear forces experienced by the bolt. Experimental results demonstrate that this smart bolt is suitable for bolt axial forces monitoring and shear forces monitoring.

引用

页码：240 / 246

页数：7

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