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Showing 1 to 20 of 22 for “"Magnetic Field Sensor"”.
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Tilt-Compensated Magnetic Field Sensor
… the accuracy, reliability, and response of magnetic detection systems. Perturbations in the magnetic field reading resulting from motion cause degradation of the output signal, compromising the performance and reliability of the magnetometer system. The purpose of this document is to …
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Three-dimensional magnetic field sensor in IBM 0.18μm CMOS technology
This work presents a compact three-dimensional Magnetic Field Sensor (MFS) designed in standard Complementary Metal-Oxide-Semiconductor (CMOS) technology. A circular Vertical Hall Device (VHD) for horizontal magnetic field detection and a split- drain Horizontal Hall Device (HHD) for the vertical …
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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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Development of a Magnetic Field Sensor System for Nondestructive Evaluation of Reinforcing Steel in Prestressed Concrete Bridge Members
… strands for load rating. This thesis presents a magnetic inspection system to measure main magnetic flux (MMF) and magnetic leakage flux (MFL) signals, to evaluate the condition of prestressing stands. A proof-of-concept has been established using a prototype electromagnet-sensor, showing a …
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Fully Distributed Multi-Material Magnetic Sensing Structures for Multiparameter DAS Applications
… demonstrates the first of its kind distributed magnetic field sensor based on a fiber optic distributed acoustic sensing (DAS) scheme. Ferromagnetic nickel and Metglas® were dispersed internally within a fiber optic preform and then drawn on an in-house fiber optic draw tower to lengths in the …
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Fibre bragg gratings for microwave photonics and sensing
… and the building of fibre Bragg grating based magnetic-field sensors. Some theoretical background about fibre Bragg gratings, photosensitivity, fibre Bragg grating sensors and filters are presented. Fibre Bragg grating sensors in other industrial applications are highlighted. Some sensing …
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Temperature insensitive fiber optic interferometer and applications
… Variations in the method of fabrication of the sensor are described. Because of the close proximity and short length of the reference and sensing arms, the interferometer is temperature insensitive. The miniaturized Michelson interferometer is characterized and its limitations are discussed. A …
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One-dimensional Bose-Einstein condensates in micro-traps
… BECs have been used to implement a microscopic magnetic field sensor. This sensor enables field measurements in a region which is not accessible for today's state-of-the-art sensors. A field sensitivity of 4 nT at a spatial resolution of 3 micrometer has been demonstrated. To investigate the …
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Custom built atomic force microscope for nitrogen-vacancy diamond magnetometry
… have the potential to be an ultra-sensitive magnetic field sensor that is capable of detecting single spins. Implementing this sensor for general and nontransparent samples is not trivial. For N-V centers to be a useful probe, a way of positioning the NV center with nanometer accuracy while …
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Estudo de sensor de campo magnético baseado em fibra óptica com rede de Bragg e Filme Fino de Terfenol-D
Magnetic field measurement has many application from military area, as detection of airplanes, ships and tanks, to electrical generator and transmission system as electric current sensing. Sensors based on optical fiber with thin film technology become great options to this application, once they …
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Spin-torque induced high frequency excitations and switching in spin-valve nanocontacts
… which is a cutting edge physics research field with a huge potential for future applications in the areas of mobile telecommunication and information- as well as in biomedical-technologies. In this device, a direct current flow through a nanocontact generates a spin polarized current in a …
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A wireless sensor network for smart roadbeds and intelligent transportation systems
We have developed a wireless sensor package to instrument roadways for Intelligent Transportation Systems. The sensor package counts passing vehicles, measures the average roadway speed, and detects ice and water on the road. Clusters of sensors can transmit this information in near real-time to …
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Nanostruktūrizuotų manganitų kobaltitų sluoksnių magnetovaržinės savybės /
… processes in these films after switching-off the magnetic field and the origin of phenomena determining these processes were studied. The influence of long term and accelerated aging of the films on their magnetoresistive properties were investigated. It has been found that cobalt doping of …
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Magnetic Communication in Harsh Environments Employing High-Sensitive Wideband Magnetic Field Sensors
… to overcome these challenges is the use of magnetic fields for short- and medium-range data transmission, as they are less susceptible to the typical interference and attenuation that occur in dense or liquid media. This work presents an innovative solution for magnetic communication that …
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Dynamic and geometric control of electronic spins in diamond for quantum sensing and quantum information science
… NV center to be not only a useful atomic-scale magnetic field sensor but also an attractive building block for quantum processors. In this dissertation, I present novel schemes to dynamically and geometrically control NV spins for improved magnetic field sensing and studies of spin dynamics. …
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Characterization of Bending Magnetostriction in Iron-Gallium Alloys for Nanowire Sensor Applications
… the sensing capabilities of biological cilia. Sensor design calls for incorporating Galfenol nanowires cantilevered from a membrane and attached to a conventional magnetic field sensor. As the wires deflect in response to acoustic, airflow, or tactile excitation, the resultant bending stresses …
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GMR-Magnetfeldsensor: "Eine IR-Kamera-Analogie"
… cooperation with the main goal to achieve a magnetic field sensor array to detect and analyze the leakage of faulty conductive power lines, producing an output image similar to that of an IR camera. For this, two approaches were tested for the buildup.<br /> The first approach is based on the …
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ELECTROCHEMICAL SYNTHESIS OF MAGNETIC MATERIALS FOR MAGNETIC RECORDING AND MEMS APPLICATIONS
With the increase in the areal density for magnetic recording disks, the bits are becoming smaller so that more bits can be accommodated in a given area of disk. However, there is a certain limit up to which the bits can be made smaller until it reaches the superparamagnetic limit, where bits …
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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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Optical Fiber Fabry-Perot Interferometer based Sensor Instrumentation System for Low Magnetic Field Measurement
… proposes a miniaturized optical fiber based sensor system for the measurement of 3-dimensional vector magnetic fields. The operation of the sensor system is based on the detection of magnetostrictive dimensional changes in the sensor gage using a modified extrinsic Fabry-Perot Interferometer …
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