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Millimetric wave radar system for the guidance of mobile ground robot

  • US 5,247,306 A
  • Filed: 10/30/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 11/09/1990
  • Status: Expired due to Fees
First Claim
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1. A device for the detection of the environment, and the positioning and/or guidance of a mobile vehicle on the ground, of the type comprising, firstly, means for the generation and transmission of a signal in frequency modulated continuous millimetric waves that can be reflected by a fixed obstacle and, secondly, signal reception means for receiving said reflected waves and signal processing means for processing said reflected waves, said reception means comprising gain correction means enabling the simultaneous detection of nearby obstacles and distant obstacles;

  • said gain correction means are analog means placed upline from the signal processing means;

    said signal processing means are digital being located downline from a sampler performing an analog/digital conversion;

    said gain correction means comprising a first subtractor receiving, firstly, a signal coming from said reception means and, secondly, this same signal delayed by a period of time equal to the sampling period of said analog/digital converter, a second subtractor receiving, firstly, the ouput signal from said first subtractor and, secondly, this same signal delayed by a time equal to said sampling period of said analog/digital converter, the output of said second subtractor supplying said analog/digital converter.

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