基于Delphi 7的高精度制冷工质PVT实验系统

作者：刘伟，王剑，姜周曙 日期：2008-12-26/span> 浏览：2904 查看PDF文档

基于Delphi 7的高精度制冷工质PVT实验系统

刘伟，王剑，姜周曙
(杭州电子科技大学 自动化研究所，浙江 杭州 310018）

摘要：在Delphi 7软件平台上完成了一套高精度制冷工质温度-体积-压力（PVT）测试系统的软件设计。采用统一建模语言（UML）规范了程序开发流程，优化了系统结构；利用Delphi 7的多线程设计，实现了实验过程的数据采集、显示及输出控制；采用改进增量式PID算法对恒温槽的温度进行了控制，最后进行了实验验证。实验结果表明，该实验系统温度测量不确定度小于±5 mK。
关键词：温度-体积-压力测试系统;统一建模语言；多线程；比例积分微分控制算法
中图分类号：TP311文献标识码：A文章编号：1001-4551(2008)11-0047-03

High accuracy PVT measurement system for refrigerants based on Delphi 7
LIU Wei, WANG Jian, JIANG Zhou-Shu
(Institute of Automation, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: A high accuracy pressure-volume-temperature(PVT) measurement system for refrigerants was developed on the Delphi 7 platform. Adoption of a unified modeling language(UML), the process for the programmes development was standardized, the structure of the system was optimized. Using of the multithreading design, the data sample, display and output control of the experimental process were implemented. The ameliorative incremental proportional-integral-differential(PID) control algorithm was used to control the temperature of thermostat. Experiment results indicate that temperature uncertainty of PVT measurement system is less than ±5 mK.
Key words: pressure-volume-temperature(PVT) measurement system; unified modeling language(UML); multithreading; proportional-integral-differential(PID) control algorithm
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