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System and method for the magnetic detection of the presence of objects in a blind angle of an automobile vehicle

  • US 7,489,234 B2
  • Filed: 08/18/2003
  • Issued: 02/10/2009
  • Est. Priority Date: 08/18/2003
  • Status: Expired due to Fees
First Claim
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1. A system for the detection of the presence of objects in a blind angle of an automobile vehicle, installed in an automobile vehicle and comprising:

  • first means of detection of distortion of the earth'"'"'s magnetic field caused by the entry of an object, containing at least one ferromagnetic material piece, in a zone of said blind angle covered by said first means of detection that supplies electric signals, on the basis of the strength of said magnetic field, to an electronic circuit with a digitizing stage for said signals,a second stage that analyses the signals obtained after said digitizing;

    a first stage that generates variable output signals based on said analysis; and

    second means of detection for possible magnetic distortion generated from a trajectory of said automobile vehicle, associated with said electronic circuit and intended to neutralize an influence of said possible magnetic distortion on the detection of said first means.

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