US Patent:
20080092443, Apr 24, 2008
Inventors:
Stephen A. Herman - Tucson AZ, US
Garrett J. Swank - Phoenix AZ, US
Estit S. Ramirez - Surprise AZ, US
International Classification:
E05F 15/20
Abstract:
An actuating mechanism for a door includes a first antenna block having a first integrated microcontroller electrically connected to a first transceiver device and a first antenna. A second antenna block having a second integrated microcontroller is electrically connected to a second transceiver device and a second antenna. A processor device is electrically connected between the first and second microcontrollers and a first switch. The first and second antennas receive a first radio frequency signal from a third, mobile transceiver device. The processor device measures a time difference of arrival (TDOA) of the first radio frequency signal. The processor device computes a direction of arrival (DOA). The DOA measurement is compared against a predefined range of DOAs. The processor device sends a control signal to the first switch to actuate the door in the event of a match.