Motion sensing system with adaptive timing for controlling lighting fixtures

  • US 5,946,209 A
  • Filed: 03/25/1997
  • Issued: 08/31/1999
  • Est. Priority Date: 02/02/1995
  • Status: Expired due to Term
First Claim
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1. A system for selectively providing power from a power source to at least one load to operate in an area for at least one occupant, comprising:

  • a relay configured to provide a current conduction path between said power source and said load when in a closed position, and to interrupt said path when in an open position;

    a processing device connected to said relay for controlling when said relay is in said open position and when said relay is in said closed position;

    a memory device associated with said processing device for storing program code and at least one parameter, said processing device being programmable to control said relay switch in accordance with said stored program code and said parameter; and

    a sensor connected to said processing device for detecting when an occupant has entered said area for providing at least one output signal to said processing device;

    wherein said processing device is programmable to close said relay in response to said output signal for a period of time, the duration of said period of time being dynamically variable and determined automatically by said processing device in accordance with how often said sensor detects said at least one occupant in said area using at least one number, said number being stored in said memory device and determined by said processing device to be the duration of time elapsing between one of initialization of said system and a first occurrence of said sensor detecting said at least one occupant, and a subsequent occurrence of said sensor detecting said at least one occupant in said area.

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