Secure remote control system with receiver controlled to add and delete identity codes
First Claim
1. An automatic door receiver system for use with a door in an opening to a limited access parking space having an opened and a closed position, said automatic door receiver system comprisinga receiver unit for receiving radio frequency signals;
- a nonvolatile read/write identity code memory having stored therein a plurality of authorized identity codes;
a receiver controller connected to said receiver unit and said read/write identity code memory fordemodulating any identity code modulated on said radio frequency signals, andgenerating an open door signal whenever a demodulated identity code corresponds to an authorized identity code; and
a memory controller connected to said read/write identity code memory for control of said authorized identity codes stored in said read/write identity code memory, and having means for writing identity codes into selected memory locations and for deleting identity codes by overwriting the corresponding memory location with a predetermined unauthorized identity code.
1 Assignment
0 Petitions
Accused Products
Abstract
A door operator provides enhanced security for controlled vehicle access by employing transmitters having unique identity codes that are fixed in manufacture. A receiver includes a nonvolatile read/write identity code memory for storing the authorized identity codes. If a received identity code is found within this memory, then the user is authorized and the door is opened. Otherwise, the user is not authorized and entry is refused. A remotely disposed memory controller controls the authorized identity codes stored in the identity code memory, which is preferably electrically erasable programmable read only memory (EEPROM). The memory controller is preferably a desk top computer including a data base program with the identity of authorized users. The identity code of transmitter held by a formerly authorized used can be determined via the data base program and deleted from the identity code memory without requiring return of the transmitter. Pass back is restricted by preventing from additional door accesses for a predetermined time following each access. In an alternative embodiment a two button transmitter includes both a fixed identity code and a user selectable identity code. One button transmits the selectable identity code to individualized receiver/operators also having a user settable identity code.
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Citations
9 Claims
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1. An automatic door receiver system for use with a door in an opening to a limited access parking space having an opened and a closed position, said automatic door receiver system comprising
a receiver unit for receiving radio frequency signals; -
a nonvolatile read/write identity code memory having stored therein a plurality of authorized identity codes; a receiver controller connected to said receiver unit and said read/write identity code memory for demodulating any identity code modulated on said radio frequency signals, and generating an open door signal whenever a demodulated identity code corresponds to an authorized identity code; and a memory controller connected to said read/write identity code memory for control of said authorized identity codes stored in said read/write identity code memory, and having means for writing identity codes into selected memory locations and for deleting identity codes by overwriting the corresponding memory location with a predetermined unauthorized identity code. - View Dependent Claims (2)
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3. An automatic door receiver system for use with a door in an opening to a limited access parking space having an opened and a closed position, said automatic door receiver system comprising
a receiver unit for receiving radio frequency signals; -
a nonvolatile read/write identity code memory having stored therein a plurality of authorized identity codes; a receiver controller connected to said receiver unit and said read/write identity code memory for demodulating any identity code modulated on said radio frequency signals, and generating an open door signal whenever a demodulated identity code corresponds to an authorized identity code; a door controller connected to said receiver controller for moving the door from the closed position to the opened position upon receipt of said open door signal; said door controller moves the door from the opened position to the closed position a predetermined time following each movement of the door from the closed position to the opened position; the receiver controller further inhibiting moving the door from the closed position to the opened position upon receipt of a demodulated identity code corresponding to an authorized identity code within a predetermined interval after receipt of that same demodulated identity code; and a vehicle exit detecting means disposed in vicinity of the door interior of the opening for detecting a vehicle immediately interior of the opening; wherein said door controller is further connected to said vehicle exit detecting means for moving the door from the closed position to the opened position upon each detection of a vehicle immediately interior of the opening. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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Specification