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Title: Study of Orthogonal Fluxgate Sensor in Terms of Sensitivity and Noise
Authors: FAN JIE
Keywords: magnetic sensors, orthogonal fluxgate, sensitivity, noise, micro-wire array
Issue Date: 2-Feb-2010
Citation: FAN JIE (2010-02-02). Study of Orthogonal Fluxgate Sensor in Terms of Sensitivity and Noise. ScholarBank@NUS Repository.
Abstract: The objective of this project is to investigate the extreme of orthogonal fluxgate sensor in terms of sensitivity and noise. Novel multi-core sensing element materials using ferromagnetic micro-wires array has been designed and characterized, the physical mechanism of multi-core orthogonal fluxgate effects has been investigated and modeled, and an orthogonal fluxgate magnetometer using micro-wire array with optimum structure has been designed, fabricated and tested. Both sensitivity and noise depend on the number of wires and the magnetic properties of the arrays. Experimental results showed sensitivity increases exponentially with the number of wires and an analytical model indicates the sensitivity has no extreme as long as the magnetic properties have not been deteriorated as the number of wires increases. However, noise in the micro-wire arrays has a minimum with an optimum structure. Theoretical limit of the white noise is much smaller than experiment results and inversely proportional to the number of wires and the susceptibility of arrays.
Appears in Collections:Ph.D Theses (Open)

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