Self calibrating, adaptive setpoint daylighting

摘要

A method and means for creating a daylight harvesting controller with a self calibrating light sensor and an adaptive setpoint that maintains a user determined light level is disclosed herein. The system includes a light sensor for monitoring the ambient light level of a designated control zone and a means to receive and interpret light level adjustment commands created by a user or user surrogate. The system includes means to limit the setpoint to a maximum value, suspend daylighting activity when lights are being adjusted or are turned off, and to delay setpoint capture and the start or resumption of daylighting until an adjustment cycle is completed and the zone light sources have reached a nominally steady state.

主权项

1. A method to dynamically capture a new setpoint for a daylighting-control zone, the method performed by a daylighting controller, said daylighting controller having at least one daylighting-control object, and comprising the steps of:
listening for a light-level-adjustment command being transmitted to one or more lighting-load-control objects controlling light sources in said daylighting-control object's control zone; categorizing said light-level-adjustment command as On, Off, Raise/Lower, or Ignored; when an applicable On or Raise/Lower command is detected, starting a setpoint-capture cycle; suspending the daylighting operation of said daylighting-control zone until said setpoint-capture process has completed; waiting for the current light-level-adjustment cycle to complete or be cancelled; and when the current light-level-adjustment cycle has completed, reading and then writing the currently sensed light level of said daylighting-control object's control zone as the new setpoint of said daylighting-control object; wherein:
no commands or other daylighting messaging listened for by said daylighting-control object within said daylighting-control zone need be processed through a central server or central processor, andsaid daylighting controller can respond and operate autonomously and automatically throughout said setpoint-capture process without any manual user control to take said daylighting controller out of its normal mode of operation.