| 摘要 |
<p>A security system for monitoring a protected area and sounding an alarm comprising at least one sensor arranged about a protected area for sensing incoming threat, means for generating at least one pulse for each sensor activated by the incoming threat to the area, an alarm controller for receipt of the pulses and sounding of an alert; and, a single wire (85) connecting outputs of sensors to the controller (35) for transmitting the pulses generated by these sensors to the controller.</p> |
