Analysis of the Accuracy of a Magnetic Field-Based Positioning System Including the Environment of a Parking Vehicle

In this paper a comparative study is conducted to analyze the accuracy of a magnetic field-based positioning system, for the position estimation of a vehicle relative to a charging device. The effect on position estimation accuracy of metallic structures on both the vehicle side and charging device’s side after the addition of steel floor reinforcements is studied. The best suited modelling tool is found to be Method of Moments after experimentally verifying the tool and comparing it on computational effort and accuracy to the Finite Element Method. It is found that a configuration with a metallic bottom plate including raised edges is the least influenced on the position estimation accuracy due to the steel floor reinforcements, independent on the transmitter location. Moreover, for the researched configurations a system with the transmitter located in the vehicle achieves a higher position estimation accuracy compared to a system with the transmitter in the charging device.

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