G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/74 (2006.01)
Patent
CA 2475143
The distance measurement unit is used on a wireless personal security system to locate users who have initiated the help alarm or the attendance sequence. The distance measurement unit consists of a microcontroller, mobile transceiver key(s), a high speed counter, and base stations with transceivers. The microcontroller controls the transceiver key(s) and the counter. The microcontroller will start the counter and cause the transceiver to transmit. When the mobile transceiver key receives the data from the base station and answers it, the microcontroller will stop the counter. The distance between the mobile transceiver key and the base station is obtained by subtracting the time it has taken the transceiver and controller to process and transmit the data from the time that appears on the counter. The base station will also trigger nearby base stations to calculate the distance. The distances measured by the stations are used to locate the key(s) in question for security and/or attendance purposes. The distance measuring sequence is controlled by the master base station(s) to avoid any possible data collision. Every base station has a map of nearby stations. So the point-to-point communication can be used, which will help to route the signal to control center faster and more reliably.
Dolmaya Tony
He Guangming
Dolmaya Tony
He Guangming
Hi-Tronic
LandOfFree
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