摘 要：针对工业测温控温存在的需求，介绍一种基于热电偶测温控制系统，系统包括温度数据采集及控制器两部分。温度数据采集由K 型热电偶、K 型热电偶串行模数转换器MAX6675 组成，控制器由单片机进行数据处理，固态继电器进行通断控制。本文阐述了MAX6675 与单片机组成的测温控温系统的硬件组成和软件的设计思路。实践表明：该系统结构简单，软件实现容易、操作方便，运行可靠、成本较低，特别适合小型企业简单测温控制，具有很好的应用推广价值。
关键词：MAX6675；单片机；K 型热电偶
中图分类号：TP273+.5；TM506 文献标识码：A 文章编号：2096-4706（2019）08-00195-02
The Application of MAX6675 in Temperature Measurement of Using K Type Thermocouple
LAO Shenglin1，HE Shijian2
（1.Guangxi Electrical Polytechnic Institute，Nanning 530007，China；
2.Guangxi Polytechnic Vocational Technical School，Nanning 530031，China）
Abstract：This paper describes a temperature measurement and control system based on the thermocouple to meet the demand of industrial thermometry and control. The system includes two parts：temperature data acquisition and controller. Temperature data acquisition is composed of K-type thermocouple and K-type thermocouple serial analog-to-digital converter MAX6675. The controller is composed of a single chip computer for data processing and a solid-state relay for continuous control. This paper describes the hardware composition and software design idea of temperature measurement and control system composed of MAX6675 and single chip computer. Practice shows that the system is simple in structure，easy to implement，easy to operate，reliable in operation and low in cost. It is especially suitable for simple temperature measurement control in small enterprises and has good application and popularization value.
Keywords：MAX6675；micro controller unit；K type thermocouple
参考文献：
[1] 顾学群. 传感器与检测技术 [M]. 北京：中国电力出版社，2009.
[2] 祖一康. 基于K 型热电偶与MAX6675 多路温度采集系统[J]. 江西理工大学学报，2007（4）：25-27.
[3] 虞致国，徐健健.MAX6675 的原理及应用 [J]. 国外电子元器件，2002（12）：41-43.
作者简介：老盛林（1964-），男，汉族，广西梧州人，教师，副教授，本科，研究方向：电气自动化技术教学和科研工作。