| 摘要 |
A method for controlling the operation of a solenoid ( 14 ), in which solenoid the movement of the plunger is caused by bringing electric energy to the solenoid, whereby an electric current flows through the solenoid, the method comprising the following steps. defining a model ( 6 ) for describing the current signal of the solenoid at certain time intervals from the activation moment of the solenoid onwards, measuring the true current signal ( 7 ) of the solenoid at time intervals corresponding with the model, defining a residual signal ( 8 ), which is the remainder between the signal of the model ( 6 ) and the true current signal ( 7 ), and performing a threshold analysis ( 25 ) for the residual signal.
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