The paper introduces the corrosion prevention of the automatic instruments for thermopair,resistance thermometer, transmitter, flowmeter levelmeter in Chemical processes.

介绍工业自动化表在氮肥，磷肥生产过程中，对检测控制表，热电偶、热电阻、变送、计、液位计选择。

This article mainly designed one kind to use composition and so on PLC and flowmeter, PH idea, thermometer and liquidometer industrial sewage processing control systems.

本文主要设计了一种利用PLC与计、PH计、温度计和液位计组成工业PH计 污水处理控制系统。

Bench of closed circuit cooling tower that is composed of boiler ,exchanger, orifice flowmeter, water pump, micromanometer , heat indicator and so on is established.

建立了由锅炉、换热、孔板计、水泵、微压计、温度计设备组成封闭式冷却塔实验台。

The responsion functions of the eddy street flowmeter and the turbine control the separation of the gas-liquid,it's arithmetic was based on BP neural network improved PID control.

文中提出利用涡街计和涡轮计响应函数来控制气液分离,其控制算法是基于BP网络改进PID控制算法。