NMOHEMS机载单元自动加压系统设计

Design of automatic pressure system of airborne units of NMOHEMS

针对NMOHEMS机载单元需要对9个压力筒分时加压的实际需求,设计了一种单传感器和单气源组成的自动加压系统。以AT89C52单片机为核心,依靠多路切换阀和高精度的压力传感器可实现对多压力筒的分时测控。实验结果表明:本系统结构简单,工作稳定,控制精度较高,能够满足现场探测单元自动弹射的需求。该系统可以人机交互进行加压控制,也可以自动控制,为多气路加压和控制提供了一种有效方法。

In order to inflate nine pressure cylinders of airborne units of NMOHEMS,automatic pressure system consisting of single pressure sensor and single air source is designed.MCU AT89C52 is the core.The pressure sensor can be used for multiple pressure cylinder detection automatic switching of multiple switching valve.The measurement and control of multiple pressure cylinder is realized relying on automatic multi-position switching valve and high precision pressure sensor.The experimental results show that the system has advantages of simple structure,stable operation and high control precision,and the system can meet automatic ejection needs of the field detection unit.The system possesses good man-machine interface,also has automatic control function,which provides a new way of inflating and controlling multiple gas circuit.