Abstract
Taking advantage of the relationship gathering from one side the force between the magnetic medium and the magnet, and from the other side the distance and the direction of the magnetic pole, a distance measurement method based on the high-intensity magnet is proposed, thus the force model of that magnet is established. The key factors affecting the high-intensity magnet’s force in the magnetic-mechanical coupling field are studied using the finite element method and the experimental verification is carried out. Therefore, when the torque sensor accuracy is 0.001 N·m, the effective detection distance is 0.6 m. The results show that the high-intensity magnet’s torque decreases exponentially with increasing the casing distance. The diameter and the moment arm of the high-intensity magnet are the linchpin affecting the ranging distance. It is to note that this is an active measurement method, so it possesses the potential application value of single or multiple casing, ranging in directional measurement and multi-point measurement, by using high-intensity magnets with magnetic poles.
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