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Apparatus for calculating misalignment quantity of beam sensor

  • US 10,429,492 B2
  • Filed: 09/24/2015
  • Issued: 10/01/2019
  • Est. Priority Date: 09/24/2014
  • Status: Active Grant
First Claim
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1. A misalignment quantity calculating apparatus for calculating and correcting a misalignment quantity of an electromagnetic wave sensor relative to a vehicle upon which the electromagnetic wave sensor is mounted, the misalignment quantity calculating apparatus comprising:

  • an identity determining means for determining whether a first object detected by the electromagnetic wave sensor is identical to a second object detected by an image sensor, the electromagnetic wave sensor transmitting a probing beam and receiving an echo based on the probing beam to detect the first object, the image sensor capturing an image and processing the image to detect the second object;

    a misalignment quantity calculating means for calculating, as a misalignment quantity of the electromagnetic wave sensor, an angle between a first line segment and a second line segment when it is determined that the first object is identical to the second object, the first line segment connecting a predetermined reference point of the misalignment quantity calculating apparatus and a first feature point of the first object, the second line segment connecting the predetermined reference point and a second feature point of the second object, wherein the predetermined reference point comprises a front edge point of the vehicle;

    a determining means for determining whether the calculated angle between the first line segment and the second line segment is equal to or more than an angular detection threshold value; and

    a correcting means for correcting the probe beam of the electromagnetic wave sensor to cancel the calculated angle between the first line segment and the second line segment.

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