火灾自动报警系统中的信号干扰因素与抑制技术

Analysis on the signal interferences and control measures in automatic fire alarm systems

从干扰信号的来源分析了火灾自动报警中存在的信号干扰因素,提出可以采用电源滤波器、干扰抑制器、软磁材料和隔离变压器等技术抑制内部干扰,采用屏蔽、接地、双绞线连接和采用电磁滤波器等技术来抑制外部干扰,从而减少火灾自动报警系统的误报率,提高系统运行的可靠性。

Analyses the signal interferences which come from the inside and outside of automatic fire alarm systems. Some measures to enhance the reliability of the fire alarm systems such as taking power line filter, interference controller, soft magnetism and insolated transformer are brought forward to prevent inner signal interferences and other measures such as shielding, grounding, taking twisted pair connection and magnetism line filter can be used to control outer signal interferences.