Electromagnetic guidance system

摘要

A bogie is provided with a center detection coil, a right-hand detection coil and a left-hand detection coil in order to make the vehicle to run automatically along an electro-magnetic induction line installed in a running path in dependence on a steering signal produced by composing a vector of a voltage induced in the center detection coil by the magnetic flux generated by the induction line and a vector of selected one of the induced voltages of the right-hand and the left-hand detection coil. A correcting circuit is provided to produce a correcting voltage signal added to the steering signal so that the latter signal becomes zero when the center detection coil is positioned directly above the induction line.