| 摘要 |
A security system including in combination a signal transmitter carried by an object wherein the signal transmitter is adapted to transmit a signal, a signal receiver adapted to receive signals, transmitted by the signal transmitter, a control unit adapted to process received signals and adapted to control an alarm system in accordance to the received signals, wherein the control unit in response to a processed received signal from the signal transmitter controls the alarm system such that the presence of objects with the signal transmitter in a designated area will not activate the alarm of the alarm system, however the control unit continues to allow the alarm of the alarm system to be activated if the alarm system senses objects without the signal transmitter in the designated area.
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