| 摘要 |
PURPOSE:To improve the accuracy of detection for positioning, by providing a couple of pickup coils connected to a deviation detector for a loading stand freely slidably on a track and providing electromagnetic transmission wires for a station. CONSTITUTION:The pickups 3, 4 provided on the loading stand catch electromagnetic waves from the electromagnetic wave transmission wires 6 and are produced with an induced voltage. Distances L<1>, L<2> from the wires 6 to the coils 3, 4 are equal, then induced voltages E<1>, E<2> are equal and the deviation detector 8 is inoperative. Thus,since a slide drive device is not operated, the loading stand 2 on the track 1 is not slided. When the position is shifted and the distances L<1>, L<2> are not equal, since the induced voltages are not equal, the detector 8 is operated and a signal is inputted to a controller 10. Then the sliding drive device 9 is operated to slide the loading stand 2. This slide is done in the direction so as to zero the difference between the distances L<1> and L<2> for the purpose of positioning. |
