【摘要】 针对燃气表检定装置应用的实际情况和检测方法存在的问题,按照国家检定规程设计了一种基于嵌入式平台的膜式燃气表检定装置。系统采用差压传感器检测燃气表的密封性和压力损失,采用湿式气体流量计检测示值误差,通过以ARM9为核心的硬件电路对相关数据进行实时采集与处理,同时控制电磁阀组完成检测气路的切换。软件方面以Linux2.6为运行平台,着重阐述了跨平台开发工具QT/Embedded的开发过程。试验结果表明,系统能够完成对燃气表多个项目的自动检定,使用方便、操作简单、检定效率高。更多还原

【Abstract】 Aiming at the practical situation of application of verification device for gas meters,and the problems existing in verification methods,in accordance with national verification regulation,based on embedded platform,the verification device for diaphragm gas meters is designed.With this system,the tightness and pressure loss of the gas meter are detected by adopting d/p transducer;while the measurement error is detected by using wet type gas flow meter,related data are acquired and processed in real time through the hardware circuit with ARM9 as the core,and the switching of the detecting circuits is accomplished by controlling the solenoids.The software of the system is operated on Linux2.6 platform,the developing procedures of the cross-platform development tools QT/Embedded are described emphatically.The experimental results indicate that the system implements automatic verification of multiple items for the gas meter,it features ease and simple operation,as well as high efficiency.更多还原