Patent ID: 7289014
Filing Date: 2007-10-30
Classification: E05F,E05Y

Abstract:
1. An operator system for automatically controlling access barriers, comprising: a controller associated with at least one access barrier; at least one beacon transceiver associated with said controller for transmitting and receiving operational signals; and at least one proximity device comprising a processor and a transponder in communication with said controller via said transceiver, said transponder communicating operational signals with said beacon transceiver based upon a position of said proximity device with respect to said beacon transceiver, wherein said controller is programmed to identify said proximity device, and wherein said beacon transceiver periodically emits a beacon signal having at least two power level signals, each said power level signal having an effective range, and each said power level signal emitted in a predetermined sequence to determine a position state of said transponder and wherein said controller monitors a number of said operational signals returned from said transponder at the at least two power levels and changes said power level signal based upon said number of said operational signals returned so as to control the position of said access barrier based upon a change in said position state and the position of said access barrier.