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Steering control system for moving vehicle

  • US 5,107,946 A
  • Filed: 07/18/1990
  • Issued: 04/28/1992
  • Est. Priority Date: 07/26/1989
  • Status: Expired due to Fees
First Claim
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1. A steering control system for a moving vehicle provided with means for detecting the present position and advance direction of the moving vehicle with respect to reference points disposed at several locations in and around a region in which a predetermined working operation is to be conducted by said vehicle, and a steering control means which controls the steering of the moving vehicle to cause said vehicle to travel along a predetermined traveling course in said region on the basis of information detected by said detecting means as well as information that defines said traveling course, comprising:

  • an obstacle sensor installed on said moving vehicle for detecting presence of an obstacle in an uncontacted manner;

    roundabout steering control means responsive to a signal from said sensor for causing said vehicle to detour around said obstacle while maintaining the distance between said obstacle and the moving vehicle at a predetermined value;

    switching means for selecting said roundabout steering control means to control the steering of said vehicle when said sensor detects the presence of an obstacle on said predetermined traveling course, said switching means being operative thereafter to select said steering control means for controlling the steering of said vehicle along said predetermined traveling course after said vehicle completes its said detour around said obstacle under the control of said roundabout steering control means; and

    means for stopping the moving vehicle in response to an obstacle detection signal from said sensor, said switching means being responsive to an output of a timer which detects a continuance of the obstacle detection signal for at least a predetermined period of time.

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