自动控制在土壤有效导热系数测定仪中的应用  

Application of automatic control on ground thermal conductivity tester

作　　者：王瑞华[1] 王普[1] 张亚庭[1] 

机构地区：[1]北京工业大学数字社区教育部工程研究中心,北京100124

出　　处：《电子测量技术》2010年第10期87-89,共3页Electronic Measurement Technology

摘　　要：土壤有效导热系数是土壤源热泵中地下埋管换热器设计的重要参数。其大小对钻孔深度与个数有显著影响。本文对土壤有效导热系数测定仪中的控制功能进行了研究与实现。系统采用LonWorks现场总线技术与VisualBasic软件编程工具实现了控制系统的硬件和软件构建,采用了开环与闭环结合的控制方法实现了电加热功率的稳定控制。运行结果表明,该系统很好地完成了控制要求。Ground valid thermal conductivity is an important parameter of the design on buried Tube Heat exchanger in ground-coupled heat pump.Its value has a remarkable impact on depth and number of hole.The control function of Ground valid thermal conductivity tester is researched and realized in this paper.LonWoks fieldbus technology and Visual Basic software programming tool are used to complete construction of hardware and software of control system..Electric heating power is controlled accurately by the way of combining open-loop control with closed-loop control.Results showed that it met the requirements of control.

关 键 词：土壤有效导热系数 电加热功率 自动控制 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]