Fibre optic strain sensors
Assessment of fibre optic strain gauges for field use in India
... a fibre optic based strain measurement system for use in the structural health monitoring (in this instance load testing) of a prestressed concrete post-tensioned box girder railway bridge in ...
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Low coherence fibre optic Fabry-Perot sensors suitable for multiplexed strain measurement
... A single receiver interferometer at the output selectively reconstracts the interference associated with individual sensors when its optical path difference is timed to match that of ea[r] ...
247
Hybrid Fibre Optic Sensor Network for Real-time High Temperature Performance Monitoring of Steel Structures
... simultaneous strain and high temperature ...simultaneous strain and temperature measurement using a HiBi-FLM concatenated with a temperature-insensitive long-period grating (LPG) written in a photonic ...
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Design and development of a fibre-optic microphone
... Some fibre optic sensors can display cross sensitivity between measurands, in particular, temperature ...of fibre such as phonic crystal fibre which is less sensitive to temperature can ...
116
Monitoring damage in advanced composite structures using embedded fibre optic sensors
... (FBG) sensors are extremely sensitive to changes of strain, and are therefore an extremely useful candidate for Structural Health Monitoring (SHM) systems of composite ...to strain gradients ...
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High stress monitoring of prestressing tendons in nuclear concrete vessels using fibre-optic sensors
... There is currently a strong interest in the nuclear power generation industry to augment prestress monitoring practices, to further improve the safety of existing and future reactors. The monitoring techniques above ...
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Monitoring damage in advanced composite structures using embedded fibre optic sensors
... Plated structures are widely used in many engineering constructions ranging from aircraft to ships, and from off-shore structures to bridges and buildings. Given their diverse use in severe loading environments, it is ...
257
Use of fibre-optic (FBG) sensors in the structural health monitoring of a battlefield helicopter rotor blade
... Page 170 As can be seen in Fig. 116, the deviation along the X axis is not pronounced and only equates to several hundred increments out of approximately 16000 data point increments taken by the software during each ...
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Optical fibre refractive index, voltage and strain sensors : fabrication and applications
... etched fibre where RI was measured in terms of reflected power ...a fibre optic “switch”, ...optical fibre containing a grating was exposed to a liquid of a certain RI by removing the ...RI ...
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Hybrid optical-fibre/geopolymer sensors for structural health monitoring of concrete structures
... While fibre optic sensors have been encapsulated in geopolymers before [13], in this work, the geopolymer substrate is functionalised so that it can also act as a secondary electronic ...
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First-time demonstration of measuring concrete prestress levels with metal packaged fibre optic sensors
... the strain sensors. Calibration of the sensors when they are permanently attached to the host object is desirable so the strain transfer from the strand to the sensor can be ...The ...
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Use of fibre-optic (FBG) sensors in structural health monitoring – high grade reinforced concrete beams
... the strain gauge surface mounted on the control beam did not record any readings after a load of 45 Kilo ...the strain gauge was located, thus breaking ...two strain gauges surface mounted on the ...
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The use of fibre optic sensors for damage detection and location in structural materials
... the fibre if the optical path length between 2 consecutive reflections is equal to the wavelength of the light, leading to constructive interference between the individual ...linear strain in the material ...
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Optical fibre sensors - applications and potential
... a fibre optic guide is that of changing the optical ...the fibre and its refractive index (indeed it is the product of the ...longitudinal strain and ten parts per million per degree C change ...
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Fiber-optic sensors : applications and advances
... O OVER THE PAST TWO DECADES, fiber-optic technology has revolutionized the telecommunications industry, enabling high-capacity, long-distance communications and networking at staggeringly low costs. Fiber optics ...
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Identifying fabrication defects of metal packaged fibre Bragg grating sensors for smart pre-stressing strands
... the fibre-capillary joint either being exposed to high temperature for too long; or conversely for too short a ...coated fibre is exposed to high temperature for a prolonged period, the molten brazing ...
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Fibre Optic Communications: An Overview
... It has small core and only one pathway of light. The difference between the refractive index of the core and the cladding is very small. SMF has a higher capacity to transmit information as it can retain the fidelity of ...
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Smart Sensor Techniques for Structural Health Monitoring of Civil Engineering Structures
... smart sensors/smart materials in SHM of civil engineering are related to the basic sensing abilities of smart ...from sensors, while others can only be detected indirectly through special diagnostic ...many ...
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Studies of measurement techniques for indirect chemical sensing based on fluorescence spectroscopy and applications for fibre optic sensors
... Oxygen sensors for oceanographic applications must provide reliable measurements over extended time periods without ...off-shore sensors cannot realistically be visited more than twice in a month due to the ...
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Deterioration of cracks in onshore wind turbine foundations
... Onshore wind turbines are becoming a focus of structural health monitoring (SHM), due to their hugely increasing role in renewable energy generation. As of 2017, onshore wind energy makes up 22.5% of the world ’ s ...
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