Rückgeführte räumlich aufgelöste Erzeugung und Messung der magnetischen Flussdichte
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Beschreibung
The generation and measurement of the magnetic flux density vector require the traceability to the unit Tesla, moreover the direction can be subject of a calibration both in relation to a coordinate system and the alignment of the individual axes to each other. If one leaves the homogeneous field and considers the spatial distribution of the flux density vector, the field generator and also the sensor acquire an additional spatial dependence. This work provide a foundation to represent the flux density vector as a spatially resolved quantity and to extend the traceability of the unit Tesla by the angular and length division.
On the generation side, this work deals with the calculation, construction and validation of a 3D field coil. Besides the homogeneity of the magnetic flux density, the orthogonality of the coil axes to each other is optimized. The coil system is able to generate gradient and saddle fields and their suitability for position determination is investigated. The goal was a transfer standard whose flux density vectors are functionally known in a spatially resolved manner.
For the measurement, a sensor body is introduced whose mirror surfaces allow its direction and position to be determined optically. The mirror surfaces thereby define a coordinate system in which, the directions and positions of the magnetic field sensors can be determined. Hall chips are used as sensors, the position of which are traced via an opto-tactile coordinate measuring device. Different measurement methods for direction and position determination from the magnetic field are investigated with these sensors and the achievable uncertainties are determined. Thus, these 3D sensors are transfer standards for measuring the flux density vector with known direction and position.
Autor*in
Nicolas Rott
Themen in »Rückgeführte räumlich aufgelöste Erzeugung und Messung der magnetischen Flussdichte«
3D-Feldspule 3D-Sensoren Erzeugung Flussdichte-Vektor Magnetfeld Magnetismus Messung Positionsbestimmung Richtungs- und Positionsbestimmung Sattelfelder Spulenachsen magnetischen Flussdichte magnetischer Flussdichte-Vektor räumlich aufgelöste Größe