基于I^2C总线的多点温度采集系统  

Multi-point temperature gathering based on I^2C bus

作　　者：孙延辉[1] 

机构地区：[1]辽宁石油化工大学信息与控制工程学院,辽宁抚顺113001

出　　处：《电子设计工程》2010年第5期69-71,共3页Electronic Design Engineering

摘　　要：基于I2C总线特点,以P89LPC922单片机为核心,设计一个单主机多从机的多点温度采集系统,主机由P89LPC922单片机、数码管显示、电源、报警、键盘等模块组成。而从机是由LM75A型数字温度传感器等组成,采集节点的实时温度值,响应主机请求发送温度数据,并编写方便与用户程序连接的I2C软件包。经测试,该系统测温范围为-55～+125℃,测量精度达到0.125℃,因此该温度采集系统设计是一个可综合处理多点温度信息的测量系统。Based on the advantage of the FC-bus, this system uses microcontroller P89LPC922 as the main control unit, and takes the working pattern of individual master and multi-slave to realize the collecting of multi-point temperatures. The master is composed by microcontroHer P89LPC922, showing module, power module, warning module, keyboard module etc, Slaves are composed by digital temperature sensor LM75A chips to fetch the real time temperatures and send the temperature data to response to the master. I2C software programming can accomplish connect user program. By testing, measuring temperature range of the system is -55℃ to ＋125℃. The accuracy of the system is up to 0.12.5℃ ,and it is an integrated multi-point temperature measurement system.

关 键 词：P89LPC922 LM75A ZLG7290 温度采集 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]