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 26 for “"Magnetic sensor"”.
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Magnopark, Smart Parking Detection Based on Cellphone Magnetic Sensor
… words, we use the walking pedestrians’ cellphone sensors to classify the sidewalk parking spots as occupied and vacant. The more pedestrians walking on the sidewalk, the more accurate our application works. As the years and technological advances both increase, we predict that the number of smart …
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An HBT magnetic sensor with integrated 3-dimensional magnetic structures
… circuits can be enhanced by the integration of sensor elements into the circuits. It is furthermore advantageous to utilise or modify the pre–existing fabrication process flow in creating this added functionality. This thesis describes a work on magnetic field sensors based on an InP/InGaAs …
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On-chip magnetic sensor and readout design for 3D position tracking in image-guided interventions
Electromagnetic tracking (EMT) technology is integral to complex medical procedures, providing precise real-time tracking of surgical instruments while reducing dependence on radiation-based imaging. EMT is particularly beneficial in various image-guided interventions, enhancing accuracy and …
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Geomagnetic Compensation for Low-Cost Crash Avoidance Project
… was to compensate for the effects of the Earth’s magnetic field in a vector field magnetic sensor. The magnetic sensor is a part of a low-cost crash avoidance system by Stephane Roussel where the magnetic sensor was used to detect cars passing when it was mounted to a test vehicle. However, the …
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Magnetoelectric (ME) composites and functional devices based on ME effect
… (ME) effect, a cross-coupling effect between magnetic and electric orders, has stimulated lots of investigations due to the potential for applications as multifunctional devices. In this thesis, I have investigated and optimized the ME effect in Metglas/piezo-fibers ME composites with a …
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Detecção de barras quebradas em motores de indução utilizando sensor magnetostrictivo composto aplicado em redes de Bragg em fibras ópticas
… before a failure occurs. In this work, a magnetic sensor based on fiber Bragg grating (FBG) and magnetostrictive composite made of Terfenol-D particulates immersed in epoxy resin matrix applied to induction motor is shown to be capable of detecting rotor broken bars in high voltage …
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Investigation of the shear layer versus the last closed flux surface on TEXT-upgrade
… Tokamak Upgrade (TEXT-Upgrade) has a set of 41 magnetic sensor coils that are used to determine the magnetic flux surface configuration of plasma discharges. These reconstructions include the x-points and the separatrix. These magnetic flux surface reconstructions and simultaneous data from …
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Caracterização por ensaios magnéticos não destrutivos de aços HP provenientes de fornos de reforma
This study aims to characterize, through magnetic tests, the different aging stages to which are submitted HP austenitic steel tubes when operating in oil industry's reformer furnaces. The assumption adopted here is that aging causes microstructural transformations that modify their magnetic …
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Development of a pulsed eddy current instrument and its application to detect deeply buried corrosion
… The ability to use the instrument with a magnetic sensor capable of sensing the magnetic field threading the coil was also added to the instrument. Using theory and experiment, it is demonstrated that a magnetic sensor is superior to the coil sensor at detecting deeply buried corrosion in …
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Driver behavior classification and lateral control for automobile safety systems
… and lateral control) using low-cost sensors that can be utilized in ADAS. For the longitudinal tire force estimation, a low cost 1Hz positioning global system (GPS) and a steering angle sensor are used as the vehicle data acquisition equipment. A nonlinear extended two-wheel vehicle …
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Road vehicle recognition and classification using magnetic field measurement
… approach uses a roadside-installed, low-cost magnetic sensor and associated data collection system. The system measures magnetic field changes to count, detect, and classify passing vehicles into a number of vehicle types. We compare each vehicle using dynamic time warping (DTW), then extend …
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Magnetic Field Sensing via Multi-Material Acoustic Sensing Optical Fibers with Magnetostrictive Cladding Inclusions
In this conducted research, optical fiber sensors are used to measure low strength alternating magnetic fields. Various fiber sensor configurations are tested and investigated to demonstrate sensing capabilities at different field magnitudes and frequencies. Distributed acoustic sensing fibers …
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Nanostruktūrizuotų manganitų sluoksnių, legiruotų kobaltu, auginimas ir tyrimas /
… of 750 oC. The structural, electrical, and magnetic properties were measured for thin LSMCO films exhibiting manganese nonstoichiometry and difference in cobalt content ranging from 0 to 0.17. LSMCO films grown on LaAlO3 substrates were epitaxial, while nanostructured films formed on …
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Dynamic Measurements with Scanning Probe Microscopy: Surface Studies Using Nanostructured Test Platforms of Metalloporphyrins, Nanoparticles and Amyloid Fibrils
A hybrid imaging mode for characterization of magnetic nanomaterials has been developed, using atomic force microscopy (AFM) combined with electromagnetic sample actuation. Instead of using a coated AFM probe as a magnetic sensor; our strategy is to use a nonmagnetic probe with contact mode AFM to …
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Electrodeposition of multilayered nanostructures for giant magnetoresistance and thermoelectric applications
… change in the material resistance in an applied magnetic field as a consequence of antiferromagnetic coupling. The nanowire high aspect ratio geometry allows the measurement of GMR with the current applied perpendicular to the plane (CPP) of the multilayers, which has been theoretically …
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Grazing Incidence X-ray Scattering from Magnetic Thin Films and Nanostructures
… has been used to characterize the structure of magnetic thin films and periodic nanostructures. The combined metal and metal oxide films have been chosen to clarify the effects of growth processing techniques in technologically important magnetic and magnetoresistive thin film materials, and …
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Multimode Structure of Resistive Wall Modes near the Ideal Wall Stability Limit
… dynamics in a tokamak using a high-resolution magnetic sensor set. Multimode effects are directly measured, rather than inferred from anomalies in single-mode behavior. In order to accomplish this, an extensive set of 216 poloidal and radial magnetic field sensors has been installed in the High …
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Modelling and Control of Magnetic Fusion Plants Based on ARM CPU and STM32 MCU Platforms
… of systems that can be integrated into magnetic fusion plant controllers. These systems, usually referred to as control and data acquisition systems, supply the interface to all the instrumentation required for the nuclear fusion plant. At an extremely high level of description, control …
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Fabrication of reliable, self-biased and nonlinear magnetoelectric composites and their applications
… field (E) or a polarization by an applied magnetic field (H), is of great interest to researchers due to its potential applications in magnetic sensors. Moreover, the ME effect in laminate composites is known to be much higher than in single phase and particulate composites due to …
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A TEM investigation of controlled magnetic behaviour in thin ferromagnetic films
Understanding the magnetic behaviour of thin film elements is of major importance for the magnetic sensor and storage industries, but also for fundamental micromagnetics. To store digital information, each memory element must support two distinct remanent magnetisation configurations that can be …
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