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Closed Loop Daylight Harvesting Light Control System Having Auto-Calibration

  • US 20060278808A1
  • Filed: 05/05/2006
  • Published: 12/14/2006
  • Est. Priority Date: 05/05/2005
  • Status: Active Grant
First Claim
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1. A method of auto-calibration for setting the target voltage level of a light sensor included within a daylight harvesting controller, comprising the steps of:

  • a. forcing all attached electrical loads to full illumination for a defined period of time;

    b. disabling all control device inputs to each electrical load during the defined time period;

    c. monitoring the light sensor during the defined time period;

    d. detecting the light level sensed by the light sensor;

    e. comparing each detected light level with a previously stored light level;

    f. determining which light level is the lowest light level;

    g. generating a target voltage level based upon the lowest light level;

    h. storing the lowest light level and the target voltage level; and

    i. repeating steps c through h.

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