Analysis of Twisting of the Wires as a Method Reducing the Influence of Stray Field on Accuracy of Magnetic Measurements
The twisting of a pair of conductors is used as a method of reducing both, the generation and the detection of stray magnetic field. Although this method is commonly used, the influence of the stray field is often underestimated, which could lead to degradation of the accuracy of measurements.
This paper presents an analysis of the influence of quality of wire twisting and potential influence on the signal-to-noise ratio. Twisted wires are approximated with two-dimensional configuration, for which typical results of calculations are presented. The paper also reports the results
measured with manually and machine twisted pairs of wires. The analysis shows that the stray influences can be reduced by up to 60% just by proper twisting of the pair of wires connecting the sensor with the measuring equipment.
Keywords: ACCURACY; MAGNETIC MEASUREMENT; MAGNETIC SENSOR; SIGNAL-TO-NOISE RATIO; TWISTING
Document Type: Research Article
Publication date: 01 March 2007
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