【摘要】 在监视区内，热释电传感器捕获到人体红外线辐射信号，经放大鉴别后，启动拨号控制电路，自动拨打报警电话，对方摘机便可听到语音电路送出的报警信息。更多还原

【Abstract】 In the supervised area, a sensor of the thermoelectric transform catchs infrared ray of the human bodies, after the signal is amplified and identificd, it starts the dial control circuit, automatically dial the alarm telephone. When the oppsite takes up the telephone,he can hear the alarm information that was sent by the audio circuit.更多还原