Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"Fibre optic sensor"”.
-
Fibre optic sensor for speed measurement
… devices. There is however a demand for low-cost sensors capable of operating in potentially hazardous environments in which optical fibre sensors are more suited. In this thesis the development of a non-intrusive speed measurement sensor, based on optical technology is described. The optical …
-
Investigations towards the development of a novel multimodal fibre optic sensor for oil and gas applications.
… at longer distances. Traditional electrical sensors operate less effectively under these extreme environmental conditions and are susceptible to electromagnetic interference (EMI). Compared to electrical sensors, fibre optic sensors offer several advantages like immunity to EMI, electrical …
-
Application of acoustic emission sensing for the non-destructive evaluation of advanced composite materials
… material (CFRP) is achieved using an all-fibre Mach-Zehnder interferometric sensor. The basic Mach-Zehnder configuration was modified to achieve the sensitivity needed to detect the low amplitude signals associated with AE. An active homo dyne feedback loop was employed to maintain …
-
Interrogation of fibre optic sensors
… thesis was to investigate the interrogation of fibre optic sensors using "off the shelf optical components and equipment developed mainly for the telecommunications industry. This provides a cost effective way of bringing fibre optic sensor systems to within the price range of their …
-
Pollutant monitoring with fibre optics in the deep ultraviolet
… carried out in the development of ultraviolet fibre-optic based absorption sensor systems, including those with the newly available ultraviolet improved silica fibres having low attenuation in the 200 nm to 250 nm wavelength region. Several approaches to optimize the optical design of such …
-
Mid-Infrared Integrated Devices for Optical Chemical Sensing
… range is of special interest for establishing optical chemical sensor technologies by allowing specific molecular identification and quantification, whether the sample is in a liquid, gas or solid form, in addition to providing highly sensitive, rapid, reagent-free and non-destructive …
-
Cross sensitivity analysis of optical fibre-based sensing for high pressure, high temperature measurement in oil and gas applications.
… wells could reach beyond 300 °C and 20000 kPa. Fibre optic sensor developments have created new interest in oil and gas production monitoring and control. Fibre optic sensors currently deployed in the oil and gas industry can only operate up to 150 °C and even the most robust sensors are limited …
-
Distributed Sensing to Assess the Shear Behaviour of Reinforced Concrete Beams
… and the effects of deterioration. Distributed fibre optic sensors (FOS) based on measuring Rayleigh backscatter provide strain measurements along the full length of the fibre up to 70 m. Digital image correlation (DIC) can show crack formation over the surface of a structure and assist with the …
-
Design and investigation of a novel 𝝿-configuration spr sensor for multi-parameter biosensing applications.
… early detection in complex biological matrices. Optical biosensors based on Surface Plasmon Resonance (SPR) principles have emerged as a viable alternative, allowing for real-time, label-free molecular interaction monitoring. However, widespread adoption of conventional SPR platforms has been …