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Multi-mode Passive Infrared Occupancy Sensor System For Energy Saving Application

  • US 20160003493A1
  • Filed: 03/25/2015
  • Published: 01/07/2016
  • Est. Priority Date: 07/03/2014
  • Status: Active Grant
First Claim
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1. A passive infrared (PIR) motion sensor system, comprising:

  • a pyroelectric detector for receiving multiple passive PIR beams from a Fresnel lens aimed at a large portion of the room or zone and upon sensing a moving human generating a pyroelectric signal;

    which is fed to aa microcomputer configured to measure and process the pyroelectric signal and the ambient temperature signal and determine whether the room or zone is occupied;

    a non-contact thermopile detector for performing a non-contact temperature measurement by capturing infrared energy from a selected focused upon area in a room or zone and generating a thermopile temperature signal therefrom;

    that is fed to a microcomputer for determination if there is a stationary human present when the system enters an occupied state;

    and an ambient temperature sensor for measuring the ambient temperature in the room or zone and generating an ambient temperature internal data;

    wherein an electrical current supply or control signal is output to the room or zone is maintained or transmitted when the microcomputer determines that the room or zone is occupied and is interrupted or reduced when the microcomputer determines that the room or zone is unoccupied.

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