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Working robot

  • US 4,994,970 A
  • Filed: 07/24/1989
  • Issued: 02/19/1991
  • Est. Priority Date: 08/16/1988
  • Status: Expired due to Term
First Claim
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1. A moving type working robot comprising a vehicle that moves within a working region defined by at least three reference points disposed adjacent a periphery of said working region, said vehicle having first detecting means for detecting a position of said vehicle relative to said reference points, said first detecting means including means for detecting an advance direction of said vehicle with respect to said reference points, first control means on said vehicle for controlling a travelling direction of said vehicle on a basis of information from said first detecting means, said vehicle being operative to perform a predetermined working operation as it moves within said working region and being loaded with a material whose amount changes with progress of said predetermined working operation, second detecting means on said vehicle for detecting the amount of said material loaded on said vehicle, said second detecting means being operative to provide an output which indicates that the amount of said material loaded on said vehicle has changed to a predetermined value, means for stopping the working operation of said vehicle in response to said output from said second detecting means during said working operation, memory means for storing the position and the travelling direction of said vehicle with respect to said reference points when said working operation is stopped, means for storing the position of an accumulating/replenishing place where the material loaded on said vehicle is to be accumulated or replenished, means for setting a travelling course extending between the position at which the working operation was stopped and the position of said accumulating/replenishing place, and second control means on said vehicle for travelling said vehicle along said travelling course from said position at which the working operation was stopped to said accumulating/replenishing place where the material loaded on the vehicle is to be accumulated or replenished.

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