Temperature independent FBG based displacement sensor for crack detection in civil structures

Sah, Randhir Kumar; Kumar, Amitesh; Gautam, Abhinav; Rajak, Vinay Kumar

doi:10.1016/j.yofte.2022.103137

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…In the literature, many current sensors based on GMM, such as Terfenol-D, have been presented. Recent studies report the remarkable progresses in the system of demodulation technology, GMM-FBG magnetic circuit structure design, FBG temperature decoupling, hysteresis nonlinear correction, and so on [15][16][17][18][19][20]. Meanwhile, it is found that the GMM-FBG fiber current transducer is affected by temperature parameters, which is mainly attributed to the temperature sensitivity of FBG, and some decoupling methods are proposed [20].…”

Section: Introductionmentioning

confidence: 99%

Structural Optimization and Temperature Compensation of GMM-FBG Fiber Current Transducer

Zhang,

Li,

Zhang

2023

Photonics

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In order to improve the sensitivity and accuracy of the giant magnetostrictive material-fiber Bragg gratings’ (GMM-FBG) current sensor, in which the magnetostrictive modulator is Terfenol-D, the temperature effects on the FBG center wavelength and GMM magnetostriction coefficient are investigated to initiate an amending scheme in which temperature parameters are introduced into a GMM-FBG sensing model so as to calibrate current values. Based on electromagnetism theory, the magnetic structure is optimized in design to significantly increase the magnetic coupling efficiency and to homogenize magnetic distribution, employing finite element simulations of the electromagnetic field. The relevant experimental platform is constructed with a wavelength demodulation system. At the temperature range of 20~70 °C, response amplitudes of the current sensor are tested under various current values. The experimental results indicate that the sensitivity of the GMM-FBG current sensor decreases with the temperature increment and is also positively correlated to the target current. Through analyzing the response characteristics of the current sensor to temperature variation, a reasonable GMM-FBG sensing amelioration model with a temperature compensation coefficient is established based on a mathematical fitting method, according to which the current detecting accuracy can be increased by 4.8% while measuring 60 A current at the representative working temperature of 40 °C.

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Section: Introductionmentioning

confidence: 99%

Structural Optimization and Temperature Compensation of GMM-FBG Fiber Current Transducer

Zhang,

Li,

Zhang

2023

Photonics

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“…Currently, sensors of the magnetic field are widely used in various fields, such as fault diagnosis of industrial machinery [ 1 , 2 ], biomedical detection [ 3 , 4 ], electronic navigation monitoring [ 5 ], aerospace [ 6 , 7 ], and more. Conventional sensors of the magnetic field in use today are based on principles such as the Hall effect [ 8 , 9 ], the Faraday law of electromagnetic induction [ 10 ], the Josephson effect [ 11 ], the Meissner effect [ 12 ], the Magnetoresistance effects [ 13 , 14 ], and the Giant Magnetoresistance effect [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature-Independent Sensor of the Magnetic Field Based on FBG and Terfenol-D

Gao

et al. 2023

Nanomaterials

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Sensors based on Fiber Bragg Grating (FBG) have remarkable benefits like small size, fast response, wide sensing distribution, and immunity to electromagnetic interference, allowing for their widespread application in numerous domains of physical parameter measurement in industrial engineering. In this work, a temperature-independent sensor of the magnetic field based on FBG and the magnetostrictive material Terfenol-D is suggested. By exploiting the distributed sensing characteristic of FBG, a sensing structure that remains unaffected by temperature is designed. The results demonstrate that within the magnetic induction intensity range of 0 mT to 50 mT, the sensitivity of the sensor can reach 7.382 pm/mT, exhibiting good linearity and repeatability. Compared with the control experiment and other sensors of the magnetic field containing Terfenol-D, the sensor has higher sensitivity, better repeatability, and good temperature stability.

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“…A magnetic tunnel junction-based gradiometer was employed in [ 4 ] for crack detection in cement. Kumar Sah et al [ 5 ] designed an optical displacement sensor using Fiber Bragg Gratings specifically for crack monitoring. Kharkovsky and Giri [ 6 ] devised a technique involving a three-axis scanning mechanism for crack detection using microwave imaging.…”

Section: Introductionmentioning

confidence: 99%

Contactless and Vibration-Based Damage Detection in Rectangular Cement Beams Using Magnetoelastic Ribbon Sensors

Tapeinos

Kamitsou

Dassios

et al. 2023

Sensors

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This study investigated the innovative use of magnetoelastic sensors to detect the formation of single cracks in cement beams under bending vibrations. The detection method involved monitoring changes in the bending mode spectrum when a crack was introduced. The sensors, functioning as strain sensors, were placed on the beams, and their signals were detected non-invasively using a nearby detection coil. The beams were simply supported, and mechanical impulse excitation was applied. The recorded spectra displayed three distinct peaks representing different bending modes. The sensitivity for crack detection was determined to be a 24% change in the sensing signal for every 1% decrease in beam volume due to the crack. Factors influencing the spectra were investigated, including pre-annealing of the sensors, which improved the detection signal. The choice of beam support material was also explored, revealing that steel yielded better results than wood. Overall, the experiments demonstrated that magnetoelastic sensors enabled the detection of small cracks and provided qualitative information about their location.

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Temperature independent FBG based displacement sensor for crack detection in civil structures

Cited by 10 publications

References 26 publications

Structural Optimization and Temperature Compensation of GMM-FBG Fiber Current Transducer

Structural Optimization and Temperature Compensation of GMM-FBG Fiber Current Transducer

Temperature-Independent Sensor of the Magnetic Field Based on FBG and Terfenol-D

Contactless and Vibration-Based Damage Detection in Rectangular Cement Beams Using Magnetoelastic Ribbon Sensors

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