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.
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Showing 1 to 20 of 58 for “"Distributed Sensing"”.
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Distributed Sensing for Monitoring Cast Iron Pipe Behaviour
… with a length of 2.2 m, were instrumented with distributed fibre optic sensors (three circumferential fibres around midspan and five longitudinal fibres along the crown, springlines, and invert) and tested in four-point bending to identify the circumferential and longitudinal strain …
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High Resolution Distributed Sensing Using Exposed-Core Fibres
Distributed fibre sensors were proposed more than 40 years ago, with their primary applications in physical sensing for civil infrastructure monitoring. Based on optical frequency domain reflectometry (OFDR), this thesis extends distributed sensing to biomedical applications, with a focus on the …
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An approach to distributed sensing in a virtual fishtank
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Multi-Material Fiber Fabrication and Applications in Distributed Sensing
Distributed sensing has been an attractive alternative to the traditional single-point sensing technology when measurement at multiple locations is required. Traditional distributed sensing methods based on silica optical fiber and electric coaxial cables have some limitations for specific …
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Distributed Sensing Testbed Development for Wavelet Based Global Map Estimation
… unmanned ground vehicles for use in autonomy and distributed sensing research has resulted in a mature platform with proven capabilities. Each Mapping Autonomous Ground Vehicle (MAGV) is capable of travel on- and off-road, speeds up to 10 mph, and its sturdy construction with a rugged suspension …
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Distributed Sensing to Assess the Shear Behaviour of Reinforced Concrete Beams
… One solution to manage these assets is to use distributed monitoring technologies to assess their performance 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 …
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Evaluation of the Flexural Response of Steel Reinforced UHP-FRC Beams Using Distributed Sensing
… this interaction due to conventional sensors. Distributed fibre-optic sensors (DFOS), particularly based on optical frequency domain reflectometry (OFDR), offer new insights. In our study, DFOS and strain gauges monitored strains along longitudinal reinforcement and support wire during …
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Pose recognition using distributed sensing : radio frequency identification, machine vision, and embedded visual patterns
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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A Quasi-distributed Sensing Network Based on Wavelength-Scanning Time-division Multiplexed Fiber Bragg Gratings
… multiplexing (WSTDM) of 1000 ultra-weak FBGs for distributed temperature sensing. In comparison with the OFDR method, the WSTDM method distinguishes the sensors by different time delays, and its maximum operation distance, which is limited by the transmission loss of the fiber, can be as high as …
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Method Development for Transmission Electron Microscopy of Carbon Nanotubes and for Distributed Sensing With Triboluminescent Materials in the Premise of Sustainable Infrastructure
… nanomaterial and cementitious matricesand for distributed sensing employing fracto-luminescent materials. The developed techniques will likely allow for improvement in durability and health monitoring of cementitious composites and thus will likely contribute toward a sustainable use of …
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Energy efficient compressed sensing in wireless sensor networks via random walk
… problem of data acquisition using compressive sensing (CS) in wireless sensor networks. Unique properties of wireless sensor networks require we minimize communication cost for efficient power usage. At first, a compressive distributed sensing (CDS) algorithm is proposed but is then modified to …
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A wireless sensor network for vibration measurement
Wireless sensor networks (sensornets) enable distributed sensing, opening up sensing possibilities not previously available. One application of sensornets is online, non-intrusive power transformer monitoring.
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Value of information based distributed inference and planning
… information. This thesis presents efficient distributed sensing and planning algorithms that improve resource planning efficiently by taking into account the obtainable Value of Information (VoI) and improve distributed sensing efficiency by ensuring agents only broadcast high value …
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Fiber-Optic Sensors for Fully-Distributed Physical, Chemical and Biological Measurement
Distributed sensing is highly desirable in a wide range of civil, industrial and military applications. The current technologies for distributed sensing are mainly based on the detection of optical signals resulted from different elastic or non-elastic light-matter interactions including Rayleigh, …
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Measurement and Modeling for Resource Monitoring
… such as condition-based maintenance. Distributed sensing technologies such as those used for resource tracking require electrical power that may not be easily available at the installation site. The toroidal current transformer based magnetic energy harvester (CTMEH), which leverages …
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Fully Distributed Multi-parameter Sensors Based on Acoustic Fiber Bragg Gratings
A fully distributed multi-parameter acoustic sensing technology is proposed. Current fully distributed sensing techniques are exclusively based on intrinsic scatterings in optical fibers. They demonstrate long sensing span, but their limited applicable parameters (temperature and strain) and costly …
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Distributed Vibration Sensing using Rayleigh Backscatter in Optical Fibers
Sensing has been essential for the investigation, understanding, exploitation, and utilization of physical phenomena. Traditional single-point sensing methods are being challenged by the multi-point or distributed sensing capabilities afforded by optical fiber sensors. A powerful technique …
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Acoustic Frequency Domain Reflectometry
… methods and demodulation techniques. Distributed measurement of temperature is tested using several novel signal processing algorithms for strain determination and is estimated to have a resolution of 0.58 °C over a 20 cm gauge length. An error correction algorithm to improve SNR in …
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Microsecond Time Synchronization for Computing Fiber Networks
… provides a roadmap for embedding synchronized sensing and computation within fibers and smart textiles, with implications for on-body audio perception and distributed sensing in flexible electronics.
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On the design of a kinetic adaptive structural surface with reference to nature, form and simplicity
… ways ahead for structural design that involves distributed sensing and control.
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