大型储粮仓群全数字微机测温系统

An All-digital Temperature Measuring System Used in Grain Barns

针对目前广泛使用的粮仓微机测温系统存在的问题 ,提出了一种适于在大型粮仓群中应用的全数字微机测温系统 ,并介绍了系统的原理、结构和软件设计。该系统采用新型数字式温度传感器和单总线结构 ,使得结构简单 ,性能稳定 ,维修方便。

Using a new type digital sensor, a new temperature measuring system, all-digital system, was developed in this work. The current temperature measuring system have some technical problems unsolved as follows: 1. The effect of electromagnetism noise to temperature analogue signal in the wires can not be totally omitted although they may be not significant. 2. Parallel connection mode between sensors makes sensos cable thicker as increasing of the number of the sensors closed up in the cable, which may increase the force that pulls the cover of barns. 3. The more joints of wires leads to high trouble rate and maintaining difficulty. All of above problems can be solved in the new system with digital sensors and single-bus-organization. Because of its advantages of simple structure, being easy to maintain and good measuring stability, this system is an ideal alternative to the analog temperature measuring system. The principle of the system, its hardware structure and software designing were also introduced in the paper.