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Parking guidance device and method thereof

  • US 7,920,070 B2
  • Filed: 11/06/2008
  • Issued: 04/05/2011
  • Est. Priority Date: 12/27/2007
  • Status: Active Grant
First Claim
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1. A parking guidance device, adapted for mounted on a car to be used as parking assistant while having information relating to the length and width of the car to be stored therein, comprising:

  • a central controller;

    a distance detector, electrically connecting to said central controller for detecting distances between obstacles surrounding the car;

    an image detector, electrically connecting to the central controller for detecting the shape of a parking space;

    a two-axis rotating detector, electrically connecting to the central controller for detecting information relating to the locality of the car;

    a human-machine operation interface, electrically connecting to the central controller for inputting signals; and

    a car controller area network bus interface, electrically connecting to the central controller for controlling the wheel, engine and braking system of the car;

    wherein, the central controller integrates the information of distances and shape of the parking space while comparing the integrated information with the information of length and width of the car as well as it locality information so as to gain a parking track, and then directs the car to move in a moving track conforming to the parking track by controlling the wheel, engine and braking system through the car controller area network bus interface;

    wherein the car length is LC the car width is WC the parking distance at the lateral side of a car is α

    which is a distance large enough for the car doors to open, the buffering distance at the lateral side of a car is β

    , the buffering distance relating to the length of the car is γ and

    the length of a detected parking space is LX and the width thereof is WX;

    wherein if the detected length LX and the width WX satisfy the following conditions;

    LC



    LX and WC





    WX

    LC

    , the parking guidance device determines that the detected parking space is suitable for parallel parking, as soon as the locality relationship information between the car and the parking space is obtained by its distance detector, the parking guidance device is able to perform a calculation according to the wheel'"'"'s turning angle and the Ackerman theory to generate a parking trajectory for directing the car to perform a parallel parking operation; and

    if the detected length LX and the width WX satisfy the following conditions;

    LC



    WX and WC





    LX

    LC

    , the parking guidance device determines that the detected parking space is suitable for garage parking, as soon as the locality relationship information between the car and the parking space is obtained by its distance detector, the parking guidance device is able to perform a calculation according to the wheel'"'"'s turning angle and the Ackerman theory to generate a parking trajectory for directing the car to perform a garage parking operation.

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