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 16 of 16 for “"Magnetic-field sensing"”.
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Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing
… microsensors is crucial for advancing modern sensing technologies with the goal of integrating increasingly complex circuits onto compact devices, such as smart phones and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional …
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Magnetic Field Sensing via Multi-Material Acoustic Sensing Optical Fibers with Magnetostrictive Cladding Inclusions
… 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 (DAS) have been largely studied and documented …
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Optical and spin coherence properties of Rb atoms in solid neon for magnetic field sensing
… emerged in solid-state electron spin systems for magnetic field sensing and imaging with nanoscale spatial resolution. The goal is to detect and resolve a single nuclear spin. A significant application for such a spatial resolution is the imaging of complex biological molecules. Nitrogen-vacancy …
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A micromachined magnetic field sensor for low power electronic compass applications
A micromachined magnetic field sensing system capable of measuring the direction of the Earths magnetic field has been fabricated, measured, and characterized. The system is composed of a micromachined silicon resonator combined with a permanent magnet, excitation and sensing coils, and a magnetic …
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The utilization of piezoelectric materials and optical fiber sensors for electric field detection
… use of these sensors for measuring electric and magnetic fields. As existing field meters have conductive parts which inherently cause field distortion, a fiber optic electric field sensor would be preferable due to the immunity of the fibers to electromagnetic interference. A novel electric …
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Multimaterial Fiber Sensors for Physical Measurements
… to create multimaterial sensors with versatile sensing capabilities. However, the high viscoelasticity of polymer materials and the limitations of existing sensing mechanisms constrain the precision and stability of these sensors. This research focuses on enhancing the sensitivity of …
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Functional Materials and Device Concepts for Magnetic Sensing, Gas Detection and Energy Harvesting
… three areas of materials science and physics: magnetic-field sensing, energy harvesting, and gas detection. Although examined separately, they are linked by their potential integration into self-sustaining sensor platforms for Internet of Things (IoT) applications, amid growing demand for …
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Dynamic and geometric control of electronic spins in diamond for quantum sensing and quantum information science
… has emerged as a promising platform for quantum sensing and quantum information science in ambient temperature. Its capability of robust but high-precision spin control allows the NV center to be not only a useful atomic-scale magnetic field sensor but also an attractive building block for …
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Design of a ground-deployed sensor for detecting the sag of Overhead Transmission Lines by measurement of the magnetic field
… the sensor was developed through simulating the magnetic field while accounting for a number of affects, such as: the shape of the hanging wires, the possible unbalance of the transmission and the induced eddy currents in the conductive ground. The accuracy in the developed strategy depends on …
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Precision magnetometry and imaging via quantum manipulation of spins in diamond
… has emerged as a leading platform for quantum sensing as well as quantum information processing at room temperature. Developing new approaches to high-precision NV spin manipulation provides key insights for advancing these quantum technologies. In this thesis, I demonstrate three experimental …
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Methods for non-intrusive sensing and system monitoring
… and useful networked solutions is hemmed in by a sensing frontier consisting of significant challenges. At any time in the service life of a machine or system it may perform below its design efficiency. Valves may leak, belts might slip, and equipment may be left on when not needed. Systems under …
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Electromagnetic methods for measuring material properties of cylindrical rods and array probes for rapid flaw inspection
… to a finite length in the axial direction, the magnetic vector potential can be expressed as a series expansion of orthogonal eigenfunctions instead of as a Fourier integral. Closed-form expressions are derived for the electromagnetic field in the presence of a finite a two-layer rod and …
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Robust post-stall perching with a fixed-wing UAV
… Following these experiments, I then build a magnetic field sensing system capable of estimating the position of the perching UAV using the magnetic field generated by a powerline. I demonstrate on hardware that the aircraft is still capable of successfully executing a closed-loop perching …
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Study on graphene-based nanocomposites with special magnetoresistance properties
… resistance under the presence of an external magnetic field. The discovery of new MR phenomena (e.g., giant magnetoresistance (GMR) and tunneling magnetoresistance (TMR)) since the 1980s initiates the revolution of novel electric devices in the fields of data storage, position sensing, current …
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Interfacial engineering and spectroscopy of spin-triplet excitons for singlet fission sensitization of silicon solar cells
… the potential of singlet fission materials for magnetic field sensing, showing that they can be used for spatial imaging of magnetic fields, as well as to create a first-of-its-kind magnetic field switchable singlet fission laser. The studies in this thesis advance our understanding of the …
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Lead - Free Piezoelectric Based Magnetoelectric Composites
… by non-zero remanent ME responses at zero magnetic bias field (Hbias). It was revealed that the self-biased ME effects can be observed in three-phase laminate composites consisting of piezoelectric material and two dissimilar magnetostrictive materials. On applying Hbias to the laminates in …