| 摘要 |
PURPOSE:To accurately read a control mark independently of layout of a running course by using steering control information obtained from the control mark placed on a guide zone also. CONSTITUTION:A control mark (m) is so provided that it is placed on a guide zone L in a plan, and a steering control sensor 6 is so constituted that it can detect steering control information corresponding to the guide zone L from the control mark (m) also. That is, the control mark (m) is obtained by forming a resin, where a magnetic material is mixed, into a thin band having the same width as the guide zone L, and its length is made different by plural preliminarily set stages in accordance with contents of display control information. The control mark (m) is magnetized to have the N pole and the S pole on the front side and the rear side respectively so that they are opposite to those of the guide zone L, and an adhesive for sticking is coated on the rear side. Thus, the control mark is provided even in a curved position of the running course in such state that the control mark can be accurately read.
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