Abstract:A radio control alarm system was developed, which is composed of a pyroelectric infrared detecting module, a radio receiving/transmitting module, a digital encoding/decoding IC, and a voice recoding/playing module. When somebody enters the surveillance area, the infrared sensor will receive and transform the radiant energy into electric signal, which is amplified by internal circuits, and then generates a control signal to start transmitting system. As the encoded pulse is modulated by the transmitting module, a radio control signal will be spread to space; When received, the signal will be demodulated, amplified, shaped and decoded to trigger the recoding/playing circuits, which play the recoded voice to awake watch people. The system mainly adopts the RDP-18 pyroelectric infrared detecting module, which has full function from signal receiving to output control. The whole device is a module configuration. It has the advantage of frequency stable, work reliable, no debugging, and a remote control distance of 1 000 m, and is suitable for use in many kinds of demands.
王松德,梁会琴,张须欣,朱小龙. 热释电红外传感器在无线遥控报警系统中的应用[J]. 光谱学与光谱分析, 2007, 27(06): 1124-1126.
WANG Song-de,LIANG Hui-qin,ZHANG Xu-xin,ZHU Xiao-long. Application of Pyroelectric Infrared Sensor to Radio Control Alarm System. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(06): 1124-1126.
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