基于ARM的封闭式负压引流机压力控制系统的设计

目的基于ARM9系统设计了封闭式负压引流（VSD）控制系统。方法系统由中央处理单元、压力传感模块和压力控制模块3部分构成。选用32位的LID—eWin7000作为中央处理单元，通过X型硅压力传感器感知压力，通过实时反馈技术控制电磁阀的开合，准确控制负压仓内压力。结果完成了封闭式负压引流机压力控制系统，实测值和显示值比较结果显示：在要求产生压力较小时，系统产生的误差比较大；在设定压力较大时，产生的误差会变小。结论经过线性算法校正，使得该压力控制系统可以满足封闭负压引流机对于压力控制的需求。

Design of ARM-based pressure control system of vacuum sealing drainage device

Objective With the extensive application of vacuum sealing drainage （VSD）, vacuum control mode needs to be developed and improved. The aim of this study was to develop ARM-based VSD system. Methods The system was composed of central processing unit, pressure sensing unit and pressure control units. 32-bit LJD-e Win7000 was used as central processing unit. X-type silicon pressure sensor was used to sense the pressure. Real- time feedback technology was applied to control the solenoid opening and closing in order to accurately control the negative pressure. Results VSD pressure control system was completed. Compared with the measured value, the system had relatively large error in low pressure. With the increase of pressure, the error decreased. Conclusion Through linear correction algorithm, the pressure control system can meet the requirements of VSD machine.