一种数字化总线式火灾探测器

A type of digital bus fire detector

介绍以微型单片机PIC16C54/56、串行A/D芯片LTC1297和离子烟雾传感器为基本部件,利用LTC1297的自动断电功能,组成数字化总线式火灾探测器的基本原理,结合实际应用,分析了串行A/D芯片可供选择的几种工作方式,并给出了试验结果,该探测器具有结构简单、耗电量小、测量精确和控制灵活等特点,适合远距离总线式数据采集系统的要求,大大地提高了火灾报警系统的可靠性,对设计各种类型的数字化总线式探测器具有实用参考价值。

?The principle of composition of the digital bus fire detector is introduced,which bases on the micro single chip processor of PIC16C54/56,the serial A/D conversion chip of LTC1297 and the ion smoke detector,and uses the function of autoshutdown of LTC1297.With the actual application,several selectable working states of the serial A/D conversion chip are analyzed,and the results of the tests are offered.Having the character of simple structure,small consumption,high measure precision and high control flexibility,this detector meets the requirements of the remote bus data acquisition system,greatly improves the reliability of the fire alarm system and possesses actual value for reference in designing all kinds of digital bus detector.