ELECTROMAGNETIC VALVE FOR SPACE SYSTEM WITH OPERATION MONITORING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an operation monitoring device capable of accurately performing monitoring of operation of an electromagnetic valve for a space system having operating properties for a small controlling amount of a flow rate and quick response speed by means of a control system at low costs and in a simple structure. SOLUTION: In the electromagnetic valve for a space system having an operation monitoring device monitoring operating conditions of the valves including opening and closing timing of the electromagnetic valve, the electromagnetic valve comprises; a step detecting sequential change of electric current electrified into an electromagnetic coil; and a step detecting the beginning of opening of the electromagnetic valve at the basis of changed timing of an electric current change rate showing sequential change of electric current from a positive side to a negative side and detecting completion of opening of the electromagnetic valve when the electric current changing line becomes a first bottom after completing its changed timing. COPYRIGHT: (C)2005,JPO&NCIPI