Monitoring state of health of solenoid

In accordance with an embodiment, there is disclosed a computer-implemented method for estimating a state of health of a solenoid valve, the solenoid valve comprising a solenoid for supporting a process control system, the method comprising the steps of: monitoring a current through the solenoid (100, 101), determining a time period between a moment at which a change in state of the solenoid valve is initiated and a moment at which a time derivative of the current is interrupted (102, 103); the time period is compared to a reference time period indicative of a health state of the solenoid valve, thereby determining the health state. 按照实施例，公开了一种计算机实现的方法，用于估计电磁阀的健康状态，所述电磁阀包括用于支持处理控制系统的螺线管，所述方法包括以下步骤：监测通过所述螺线管的电流(100，101)，确定发起所述电磁阀的状态改变的时刻和所述电流的时间导数中断(102，103)的时刻之间的时间段；将所述时间段与指示所述电磁阀的健康状态的参考时间段进行比较，从而确定健康状态。