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本文介绍了液袋式液压胀管机在胀接过程中压力测控的特点和要求，研制开发了以S7-200可编程控制器为核心的压力测控系统，取得了较为满意的运行效果。文中介绍了硬件系统结构及软件框图。
This paper introduces the characteristics and requirements of the pressure measurement and control of liquid bag hydraulic expander in the process of expansion joint. The pressure measurement and control system with S7-200 programmable controller as the core has been developed and the satisfactory operation result has been achieved. This paper introduces the hardware system structure and software block diagram.