| 摘要 |
<p>A portable, self-contained, economical detection apparatus (10) includes a detector unit (12) for sensing an alert condition such as unauthorized intrusion and responsive thereto for transmitting a wireless alarm signal to a receiver unit (14) or an autodialer (16). The preferred receiver unit (14) is portable and is small enough to be carried in one's pocket and responds to the alarm signal by activating a beeper (68) or vibrator (66). The receiver unit (14) also includes an actuatable arming transmitter (58) for transmitting an arming signal to the detector unit (12) which is enabled only upon receipt of the arming signal. The autodialer (16) responds to the alarm signal by dialing a designated telephone number and indicating the alert condition. An alternate detection apparatus (99) includes multiple zone units (100, 102, 104) with zone sensors (112, 118, 124) for detecting alert conditions. Zone detection units (110, 116, 122) are operable to transmit encoded wireless alarm signals (128, 130, 132) to a receiver (106). The receiver (106) causes an alert device (108) having a display (142) to notify a remote individual of the alert condition and which zone it occurred in.</p> |
