CONTROL DEVICE FOR SOLENOID VALVE AND DETECTION METHOD OF SOLENOID VALVE OPERATION

摘要

PROBLEM TO BE SOLVED: To provide a control device for a solenoid valve and a detection method of a solenoid valve operation which precisely detect the change in an operation state of a solenoid valve, that is valve opening time and valve closing time of the solenoid valve, with a simple structure, and which can properly control opening/closing of the solenoid valve by precisely correcting a driving voltage and a driving current applied on the solenoid valve.SOLUTION: A control device for a solenoid valve includes: an A/D conversion part for converting a driving voltage or a driving current to a solenoid valve into a digital signal; a filter part in which the gain becomes about 0 in a predetermined frequency; and a detection part for detecting the operation of the solenoid valve based on an output when the digital signal is inputted in the filter part.SELECTED DRAWING: Figure 9