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在自动化闭环控制系统中,作为能量转换元件的传感器,由于其响应时间的迟滞性,影响系统执行件的位移精度。目前传感器类型很多,图示是美国霍尔顿制造公司所生产的一种新型的EN40传感器结构示意图。图中提升阀的提动头8通过弹簧板1与可动线圈10相连,该线圈是悬浮在由永久磁铁9所产生的磁场中,当输入到线圈中的电流增加时,线圈往下移动,迫使提动头8靠近阀座7,使输入气体通过固定节流口到达先导压力室2后的泄漏
In an automated closed-loop control system, the sensor as an energy conversion element affects the accuracy of the displacement of the system actuator due to its hysteresis in response time. At present, there are many types of sensors. The illustration shows a new type of EN40 sensor structure diagram produced by Holden Manufacturing Company. The poppet head 8 of the poppet valve is connected via a spring plate 1 to a movable coil 10 which is suspended in a magnetic field generated by a permanent magnet 9 and which moves downward as the current fed into the coil increases, Forcing the poppet 8 close to the valve seat 7 to allow leakage of the input gas to the pilot pressure chamber 2 through the fixed orifice