Results 211 to 220 of about 60,127 (297)
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Fiber Bragg grating cryogenic temperature sensors
Applied Optics, 1996Temperature sensing to as low as 80 K was demonstrated with 1.55-μm fiber Bragg gratings. The gratings were bonded on substrates to increase sensitivity, and a shift of the reflection wavelength was measured. The temperature sensitivity was 0.02 nm/K at 100 K when an aluminum substrate was used and 0.04 nm/K at 100 K when a poly(methyl methacrylate ...
S, Gupta +3 more
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High Sensitivity Fiber Bragg Grating Acceleration Sensor Based on Rigid Hinge
IEEE Sensors Journal, 2020In order to break through low sensitivity limitation of the existing fiber Bragg grating (FBG) acceleration sensor, a new high sensitivity FBG acceleration sensor based on rigid hinge is proposed.
Zhichao Xie +4 more
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Fiber Bragg grating deflection sensor
SPIE Proceedings, 2008A new fiber-optic sensor system consisting of a fiber Bragg grating (FBG) cantilever as a transducer is proposed and demonstrated to realize simultaneous measurement of magnitude and direction of deflection. For the FBG mounted on a stainless steel cantilever, a change in the bending deflection gives rise to a monotonous shift in the Bragg resonance ...
Ping Lu, Liqiu Men, Qiying Chen
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Design and analysis of high-frequency fiber Bragg grating vibration sensor
Measurement science and technology, 2020The fiber Bragg grating vibration sensor has received a lot of attention due to its unique performance. However, the natural frequency of the sensor limits its development and application.
Haozhou. Wu +4 more
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Fiber Optic Bragg Grating Sensors
SPIE Proceedings, 1990This paper describes a new method that we have developed to generate Bragg grating filters in germania-doped communication fibers and discusses their applications as sensors. The gratings are formed by exposing a short section of the core, through the side of the fiber, to an interference pattern of intersecting coherent beams of UV light.
W. W. Morey, G. Meltz, W. H. Glenn
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Structural Health Monitoring, 2020
Pipeline, serving as one of the most important gas transportation methods, can cause serious consequences in the event of leakage, so leakage monitoring is particularly important.
Tao Jiang +5 more
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Pipeline, serving as one of the most important gas transportation methods, can cause serious consequences in the event of leakage, so leakage monitoring is particularly important.
Tao Jiang +5 more
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Fiber Bragg grating multichemical sensor
SPIE Proceedings, 2006Fiber optic-based chemical sensors are created by coating fiber Bragg gratings (FBG) with the glassy polymer cellulose acetate (CA). CA is a polymeric matrix capable of localizing or concentrating chemical constituents within its structure. Some typical properties of CA include good rigidity (high modulus) and high transparency. With CA acting as a
Patrick Boland +5 more
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Graphene-oxide-coated fiber Bragg grating sensor for ethanol detection in petrol
Measurement science and technology, 2019In this work, a study on a graphene oxide (GO)-coated fiber Bragg grating (FBG) sensor for ethanol detection in petrol is reported. The fiber Bragg gratings (FBGs) used in the present experiment were fabricated in-house using a high repetition rate (~5.5
P. Kumar +5 more
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Knee Angle Measurement Device Using Fiber Bragg Grating Sensor
IEEE Sensors Journal, 2018Human joint kinematics has established its capacity as a vital tool for joint pathology and gait analysis. Range of motion (ROM) of a knee joint performed by flexion and extension is an essential tool to assess the efficacy of surgical interventions or ...
Shweta Pant, Sharath Umesh, S. Asokan
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Fiber Bragg Grating Settlement Sensors
ACTA PHOTONICA SINICA, 2011The invention discloses a fiber bragg grating settlement sensor. The fiber bragg grating settlement sensor comprises a sensor foundation, a sensing section and a sensor upper cover; the sensor foundation is fastened with the sensing section through threads; the sensor foundation and the sensing section form a pressure chamber through a pressure ...
杜磊 DU Lei +4 more
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