| 摘要 |
<p>A position monitoring system having a position finder subsystem connected (46) via a cellular telephone to a central monitoring station, a receive/transmit means carried with the position monitoring subsystem. A remote personal signalling subsystem comprising an RF coder modulator for transmitting a coded RF signal, and operating switch for activating the RF coder modulator. A receiver/transmit is carried with said position finding subsystem for receiving the coded RF signal, decoding same and transmitting a coded RF acknowledgement signal. The remote personal signalling subsystem including RF decoder and demodulator for receiving and decoding the coded RF acknowledgement signal and a tactile signalling device is operated by the RF decoder and demodulator upon receipt of the coded RF acknowledgement signal and provides a tactile signal to a user that the RF coded signal had been properly received by the position finding subsystem. The transceiver carried by the position finding subsystem is connected to the central monitoring station and sending said coded RF acknowledgement signal is controlled by said central monitoring station.</p> |
