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.