全数字式网络化冰箱制冷性能分布式计算机测试系统的设计

Design of refrigerator refrigeration performance distributed computer test system based on digital sensor and network technology

设计了一种全数字式网络化冰箱制冷性能分布式计算机测试系统 .该系统选用DS18B2 0数字温度传感器作为测温元件 ,采用主—从轮询通信协议 ,利用Windows 2 0 0 0多线程技术 ,通过串行通信接口RS— 4 85将一台PⅢ工控机与 2 15台以单片机 2 0 5 1为核心的数据采集仪组成星型和总线混合网络 ,实现了上位机与多下位机的在线实时数据通信 .实际运行情况表明 ,该系统设计合理、稳定可靠 .

The design of refrigerator refrigeration performance distributed computer test system is introduced.DS18B20 digital sensor was used as temperature detect component in this system.Communication protocol is host computer and subordinate computer poll.Using multithread technology of Windows 2000 through RS-485 a PⅢ industry control computer links 215 data acquisition equipment which have a 2051 single chip computer.So bus topology mixed star topology network was formed and realized host computer realizes real online communication with subordinate computer.The structure of this system is simple and steady;programming is very easy.