METHOD AND APPARATUS FOR RADIO FREQUENCY SECURITY SYSTEM WITH AUTOMATIC LEARNING

摘要

A security system for control access of multiple users to a selected area combines rotating electronic security code or equivalent technology with an automatic self- learning receiver. The first transmitter is "learned" by the receiver manually, but subsequent transmitters are learned without the need for actuating the conventional "manual learn" mode of the receiver. Instead, by simply sending the transmit signal twice within a fixed time period, users o f the subsequent transmitters use "self learning" circuitry (interposed between conventional transmitter and re- ceiver technology) in a way that is relatively transparent to the user. Othe r aspects of conven- tional systems are provided, such as separate control via computer or otherwise of an authorized list of uniquely-identified transmitters. In alternative embodiments, even t he first transmit- ter/controller can be programmed into the receiver (such as at the time of manufacturing or in- stalling the system).