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Method and system for navigation of movable platform

  • US 8,688,308 B2
  • Filed: 11/20/2012
  • Issued: 04/01/2014
  • Est. Priority Date: 12/29/2011
  • Status: Active Grant
First Claim
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1. A method for navigation of a movable platform, used in a system;

  • the system includes a plurality of reflection devices and a movable platform, wherein the movable platform further includes a positioning system, a laser range finder and a processor, the method comprising;

    placing the plurality of reflection devices to mark a range;

    receiving, by the positioning system, a coordinate location and a direction of the movable platform;

    emitting, by the laser range finder, at least one laser to measure relative positions and distances respectively between the plurality of reflection devices and the movable platform;

    calculating, by the processor, absolute locations of the plurality of reflection devices and the range according to the coordinate location and the direction of the movable platform, and the relative positions and the distances between the plurality of reflection devices and the movable platform; and

    scanning and tracking, by the laser range finder, the plurality of reflection devices, and calibrating, by the processor, the coordinate location and the direction of the movable platform and the absolute locations of the plurality of reflection devices to control the movable platform to move in the range;

    wherein when the processor calibrates the coordinate location and the direction of the movable platform and the absolute locations of the plurality of reflection devices, the method further comprising;

    locking, by using the laser, a first reflection device which is closest to the movable platform to calibrate the coordinate location of the mobile platform;

    finding a second reflection device which is closest to the movable platform except the first reflection device when the mobile platform is close to a boundary of the range;

    obtaining an angle between a line from the mobile platform to the first reflection device and a line from the mobile platform to the second reflection device; and

    controlling the mobile platform to move in another direction in the range when the angle reaches 180 degrees.

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