Simultaneous measurement of the temperature and force using a steel cantilever soldered with a partially nickel coated in-fibre Bragg grating

Li, Yulong; Feng, Yan; Peng, Xingling; Zhang, Hua

doi:10.1016/j.optcom.2012.06.060

Cited by 15 publications

(11 citation statements)

References 23 publications

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“…As reported by Li et al, the FBG sensor is also sensitive to temperature changes, so the entire experiments are conducted in a laboratory with constant temperature under a controlled condition. 2 To determine the wavelength change of the FBG, the Bragg wavelength shift was recorded using an MOI FBG static sensor demodulation instrument. It is quantitatively illustrated in Table 1 where the original and after-mounted central wavelengths of two FBG sensors are presented.…”

Section: Fbg Wavelength Shift During Different Walking Posesmentioning

confidence: 99%

“…The central wavelength data can be directly transmitted into a computer using the MOI FBG static sensor demodulation instrument. In some experiments, 2,3,22 the central wavelengths should be calibrated into specific forces or angles. However, the central wavelengths can be directly processed into gait pattern without calibration.…”

Section: Advantages Of the Researchmentioning

confidence: 99%

“…Fiber Bragg grating (FBG) sensors have undergone a rapid development in the fields of biomechanics, biomedical, and rehabilitation engineering due to their prominent advantages, such as immunity to electromagnetic interference, remote sensing, ease in handling, low cost, small size, and light weight. [1][2][3] These distinguishing features make FBG sensors suitable for human body applications as they can be used for gait analysis in walking cycles. The FBG sensors can be alternatives to standard technologies, including electrical strain gauge, piezoelectric, resistive, and other solid-state sensing, measuring physical parameters, and performing high-sensitivity biochemical analysis.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative method for gait pattern detection based on fiber Bragg grating sensors

Ding

Tong

2017

J. Biomed. Opt

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This paper presents a method that uses fiber Bragg grating (FBG) sensors to distinguish the temporal gait patterns in gait cycles. Unlike most conventional methods that focus on electronic sensors to collect those physical quantities (i.e., strains, forces, pressure, displacements, velocity, and accelerations), the proposed method utilizes the backreflected peak wavelength from FBG sensors to describe the motion characteristics in human walking. Specifically, the FBG sensors are sensitive to external strain with the result that their backreflected peak wavelength will be shifted according to the extent of the influence of external strain. Therefore, when subjects walk in different gait patterns, the strains on FBG sensors will be different such that the magnitude of the backreflected peak wavelength varies. To test the reliability of the FBG sensor platform for gait pattern detection, the gold standard method using force-sensitive resistors (FSRs) for defining gait patterns is introduced as a reference platform. The reliability of the FBG sensor platform is determined by comparing the detection results between the FBG sensors and FSRs platforms. The experimental results show that the FBG sensor platform is reliable in gait pattern detection and gains high reliability when compared with the reference platform.

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Section: Fbg Wavelength Shift During Different Walking Posesmentioning

confidence: 99%

Section: Advantages Of the Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantitative method for gait pattern detection based on fiber Bragg grating sensors

Ding

Tong

2017

J. Biomed. Opt

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“…For conventional UV-inscribed FBGs, the reflected spectrum of the sensor does not change significantly from room temperature to 400 • C, above which the grating loses its excellent sensing performances [4]. The gratings written in the boron-germaniumsilicon fiber, on the other hand, resist up to 400 • C [5,6], while direct-writing gratings resist up to 950 • C [7]. Despite the performance achieved with the latter type of sensors, the goal is to protect the more conventional boron-germanium-doped SiO 2 fiber grating mechanically and thermally so that they can operate stably and with good sensitivity at least up to 800 • C. FBG sensing is an established technology that offers a monitoring solution in harsh conditions where electrical sensors typically have difficulty providing reliable results [8].…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Aspects of Ni-Coating and High Temperature Treatments for FBG Spectrum Regeneration

et al. 2023

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The structural integrity of mechanical components is assessed by FBG sensors in many industrial fields. The FBG sensor has a relevant application at very high or low temperatures. To avoid the variability of the reflected spectrum and the mechanical properties degradation of the FBG sensor, metal coatings have been used to guarantee the grating’s integrity in extreme temperature environments. Particularly, at high temperatures, Ni could be a suitable selection as a coating to improve the features of FBG sensors. Furthermore, it was demonstrated that Ni coating and high-temperature treatments can recover a broken, seemingly unusable sensor. In this work, two main objectives were pursued: first, the determination of the best operative parameters to achieve the most compact, adherent, and homogeneous coating; second, the correlation between the obtained morphology and structure and the FBG spectrum modification, once Ni was deposited on the FBG sensor. The Ni coating was deposited from aqueous solutions. By performing heat treatments of the Ni-coated FBG sensor, it was investigated how the wavelength (WL) varied as a function of temperature and how that variation was caused by the structural or dimensional change of the Ni coating.

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“…FBG is fragile, thus, is required to be protected before its practical use. Previous studies have demonstrated the protective packages can function as parameter compensations [5][6][7][8]. During the FBGs actual use period, the birefringence is induced when FBGs are bent, clamped or twisted [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Temperature Sensing of Stepped-Metal Coated Optical Fiber Bragg Grating with the Restructured Dual-Peak Resonance

et al. 2019

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This paper demonstrates a method for the development of stepped-metal coating on optical fiber Bragg grating. The paper also analyzes the dual-peak resonance restructured by the nickel/copper stepped-metal coating. According to the coefficients of linear thermal expansion of the coatings, the modeling and experimental analysis is categorized into three types: Type A, Type B, and Type C. We denote the temperature sensitivity difference between the two peaks as ΔKT for Type A, ΔK′T for Type B, and ΔK″T for Type C. The experimental results show that ΔKT, ΔK′T, and ΔK″T are 2.1 pm/°C, 6.5 pm/°C, and 0.8 pm/°C, respectively. The model analysis and the experimental results all show the Type B stepped-metal coating causes the most obvious temperature sensitivity difference between the two resonance peaks. The stepped-metal coating on the same one Bragg grating can restructure the single resonance into dual-peak resonance with different temperature sensing, and Type B can be used to develop a dual-parameter optical fiber Bragg grating sensor at one location which can measure two physical parameters simultaneously.

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Simultaneous measurement of the temperature and force using a steel cantilever soldered with a partially nickel coated in-fibre Bragg grating

Cited by 15 publications

References 23 publications

Quantitative method for gait pattern detection based on fiber Bragg grating sensors

Quantitative method for gait pattern detection based on fiber Bragg grating sensors

Metallurgical Aspects of Ni-Coating and High Temperature Treatments for FBG Spectrum Regeneration

Temperature Sensing of Stepped-Metal Coated Optical Fiber Bragg Grating with the Restructured Dual-Peak Resonance

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