Sleep detection and driver alert apparatus

  • US 5,689,241 A
  • Filed: 05/31/1996
  • Issued: 11/18/1997
  • Est. Priority Date: 04/24/1995
  • Status: Expired due to Fees
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First Claim
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1. A sleep detection and driver alert apparatus for sensing sleep or drowsiness in a driver of a motor vehicle or the like, comprising:

  • a. a containing housing suited to be attached to the rear view mirror or attached to the dashboard of an automobile;

    b. an infrared, digital, auto-focus image stabilization zoom camera type lens;

    c. thermal sensing means for sensing ambient heat output pixel color changes from a driver'"'"'s facial mouth and eye area;

    d. an optical motion detection circuit for sensing absence of motion from the output of said digital infrared auto-focus image stabilization zoom camera type lens;

    e. digital, infrared thermal imaging means for determining changes in infrared thermal output between open and closed eye color pixel changes;

    f. sleep status detection means for comparing the output of said optical motion detection circuit, and said thermal sensing means;

    g. an auto calibration memory for storing alarm limit and range data for users of differing size, height, and other physical characteristics;

    h. an alarm circuit for comparing the output of said sleep status detection means with previously stored calibration information; and

    i. an audible alarm means for sounding an audible alarm.

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