Journal ArticleDOI
A Novel Fiber Bragg Grating Displacement Sensor With a Sub-Micrometer Resolution
TLDR
In this article, a novel fiber Bragg grating displacement sensor with a sub-micrometer resolution was proposed, where a wedge-shaped sliding block and a T-shaped cantilever beam formed a conversion mechanism to transfer the horizontal measured displacement into the transverse movement of the optical fiber midpoint.Abstract:
This letter has proposed a novel fiber Bragg grating (FBG) displacement sensor with a sub-micrometer resolution through the use of the transverse property of a suspended optical fiber with a pre-tension force. A wedge-shaped sliding block and a T-shaped cantilever beam formed a conversion mechanism to transfer the horizontal measured-displacement into the transverse movement of the optical fiber midpoint. Compared with existing FBG displacement sensors, this design does not only avoid the FBG-pasting process and its associated issues, such as the chirping failure and low repeatability, but also achieves a high resolution. The sensing principle has been presented, and the corresponding theoretical model has been derived and validated. Experiments show that this design has an excellent sensitivity of 2086.27 pm/mm and a high resolution of $0.48~\mu \text{m}$ within a range of 1.0~2.0 mm. The displacement results from the proposed sensor closely agree with the values detected from the commercial laser displacement sensor, validating its effectiveness. Therefore, the proposed sensor can be directly utilized to measure the sub-micrometer displacement, and also support multi-point distributed detection.read more
Citations
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Journal ArticleDOI
Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review
TL;DR: Fiber Bragg grating has embraced the area of fiber optics since the early days of its discovery, and most fiber optic sensor systems today make use of fiber Bragg-grating technology as discussed by the authors.
Journal ArticleDOI
A High-Precision and Miniature Fiber Bragg Grating-Based Force Sensor for Tissue Palpation During Minimally Invasive Surgery
TL;DR: Dynamic force stimulation experiments, in vitro palpation implementation on a silicone phantom embedded with simulated tumors and ex vivo indentation experiments on a porcine liver have validated the effectiveness of the presented sensor design.
Journal ArticleDOI
A High-Sensitivity Fiber Bragg Grating-Based Distal Force Sensor for Laparoscopic Surgery
TL;DR: In this paper, a fiber bragg grating (FBG)-based distal force sensor with a high sensitivity and a relatively large measurement range is presented to provide force feedback for laparoscopic surgery.
Journal ArticleDOI
Review of micromachined optical accelerometers: from mg to sub-μg
TL;DR: The status and development tendency of MOEMS accelerometers are presented to meet the ever-increasing demand for high-precision acceleration measurement and the typical performances, advantages and disadvantages are discussed on the basis of typical demonstrations.
Journal ArticleDOI
Simultaneous strain and temperature measurement using a single fiber Bragg grating embedded in a composite laminate
TL;DR: In this paper, a fiber Bragg gating (FBG) sensor that can be surface mounted for simultaneous strain and temperature measurements is presented, where the spectral bandwidth and the Bragg wavelength of the FBG spectrum vary with strain as well as temperature.
References
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Journal ArticleDOI
Fibre Bragg gratings in structural health monitoring—Present status and applications
Mousumi Majumder,Tarun Kumar Gangopadhyay,Ashim Kumar Chakraborty,Kamal Dasgupta,D.K. Bhattacharya +4 more
TL;DR: The recent research and development activities in structural health monitoring using FBG sensors have been critically reviewed, highlighting the areas where further work is needed.
Journal ArticleDOI
Review: optical fiber sensors for civil engineering applications
Christopher K.Y. Leung,Kai Tai Wan,Daniele Inaudi,Xiaoyi Bao,Wolfgang R. Habel,Zhi Zhou,Jinping Ou,Masoud Ghandehari,Hwai Chung Wu,Michio Imai +9 more
TL;DR: In this paper, different kinds of sensing techniques, including change of light intensity, interferometry, fiber Bragg grating, adsorption measurement and distributed sensing, are briefly reviewed to introduce the basic sensing principles.
Journal ArticleDOI
FBG-type sensor for simultaneous measurement of force (or displacement) and temperature based on bilateral cantilever beam
TL;DR: An improved FBG-type sensor for simultaneous measurement of force and temperature based on the bilateral cantilever beam (BCB) is proposed and demonstrated in this paper, where two parts of the beam are subject to opposite forces (or displacements) leading to a red shift for the part of the FBG subject to stretch and to a blue shift for other one.
Journal ArticleDOI
Simultaneous displacement and temperature measurement with cantilever-based fiber Bragg grating sensor
TL;DR: In this article, a novel technique is presented to measure displacement and temperature simultaneously with a single fiber bragg grating, which relies on attaching the FBG on a cantilever structure, so that the vertical displacement of the free end can be obtained by measuring the wavelength shift of FBG.
Journal ArticleDOI
Fiber Bragg grating sensor for simultaneous measurement of displacement and temperature
TL;DR: A new approach to measuring displacement and temperature simultaneously by use of a specially designed isosceles triangular cantilevered beam as a strain agent is demonstrated.
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