流量计检定装置中流量变化的自动控制

文章介绍了流量计检测设备中的主要流量控制方面的核心问题及解决方法。在硬件方面简要介绍了计算机与变频器的连接，在软件方面利用VC 通信控件MSComm编制上位机软件并且提供了详细的程式和实际中遇到的问题及解决方法。软件和硬件利用RS-485通讯有机结合良好地实现了工程的目的。

Automatic control of flow change in flowmeter verification device

The article introduces core problem to design and solution methods that automatic control the flow change in flowmeter verification device. In the aspects of hardware, the synopsis introduced that the computer connect with the transducer, in the aspects of software, provided the detailed program and the problem that meet and solution method in the practicality. The software makes use of the RS-485 with the hardware combinative that realizes the purpose of the engineering.