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Map generation device

  • US 10,253,481 B2
  • Filed: 10/28/2015
  • Issued: 04/09/2019
  • Est. Priority Date: 11/06/2014
  • Status: Active Grant
First Claim
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1. A map generation device which generates travelable map information representing an area capable of being traveled by work machines, including a haulage vehicle hauling a load, the travelable map information being defined as inside an area of a boundary of a working site,the map generation device being configured by connecting a controller including a CPU;

  • a storage device; and

    a communication device,wherein the storage device stores programs that when executed by the CPU configure the CPU to;

    store the travelable map information in the storage device and input/output the travelable map information to/from the storage device,receive and transmit, with the communication device, position information obtained by positioning devices equipped on the work machines between the controller and the work machines,wirelessly communicate the travelable map information stored in the storage device with the work machines including the haulage vehicle and a loading machine loading a load onto the haulage vehicle with the communication device;

    accumulate position information representing a position of one of the work machines and operational information representing an operational status of the one work machine as the one work machine travels in the working site;

    calculate an operational range of the one work machine on the basis of the position information and the operational information;

    calculate a gravity center position as a reference point of the operational range of the one work machine on the basis of the position information;

    andverify the operational range of the one work machine against the travelable map information by determining that the one work machine is within the boundary of the working site when a distance between the gravity center position and a position closest to the gravity center position on the boundary of the working site is greater than a predetermined threshold;

    correct boundary information of the working site in the travelable map information to decrease an area of the working site when the gravity center position is determined in the verifying of the operational range of the one work machine to be located within the boundary of the working site;

    correct the boundary information of the working site in the travelable map information to increase the area of the working site when the gravity center position is determined in the verifying of the operational range of the one work machine to be either located on the boundary or outside the boundary of the working site;

    and then update the travelable map information with the corrected boundary information.

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