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Passive infrared range, size, and direction finding proximity detector

  • US 8,963,088 B2
  • Filed: 07/17/2014
  • Issued: 02/24/2015
  • Est. Priority Date: 02/22/2012
  • Status: Active Grant
First Claim
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1. A passive proximity detecting device for detecting an object within a detection area and controlling a controlled device, comprising:

  • a sensor comprising a plurality of pixels arranged in a substantially contiguous array, each pixel configured to detect infrared radiation emitted by the object in a predetermined temperature range within said detection area, and in response to detecting said object generating a detection signal having a signal level proportional to said infrared radiation emitted by said object received by said pixel; and

    a processor in communication with said sensor, said processor configured to receive said detection signal, to derive a first object parameter and a second object parameter using, at least in part, a signal level of said detection signal from one or more of said plurality of pixels,wherein said first object parameter comprises an object distance and said second object parameter is one of the group consisting of an object size, an object position relative to said sensor, an object speed, and an object direction of motion.

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