求翻译：本论文分析变频恒压供水的原理及系统的组成结构，提出不同的控制方案，通过研究和比较，本论文采用变频器和PLC实现恒压供水和数据传输，然后用数字PID对系统中的恒压控制进行设计。最后对系统的软硬件设计进行了详细的介绍。本论文设计与实现通过MCGS进行数据传输的远程网络巡回监控系统。具体讲述了系统的总体设计与软件的实现，并对系统采取的可靠性措施进行了说明。是什么意思？

This paper analyzes the principle of constant pressure water supply and system composition, the different control schemes, through research and comparison, this paper adopts inverter and PLC constant pressure water supply and data transmission, digital pid system constant pressure control design. Fi

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The present paper analysis frequency conversion constant pressure water supply principle and the system composition structure, proposed the different control plan, through the research and the comparison, the present paper uses the frequency changer and the PLC realization constant pressure water su

This paper analysis and principle of frequency conversion constant pressure water supply system of structure, proposed a different control scheme, through research and comparison, this paper adopts frequency converter and PLC to realize constant-pressure water supply and data transfer and digital PI