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磁致伸缩位移传感器在闸门启闭机开度应用

目前的水利建设中使用有一种钢坝,其主要包括有闸门,闸门的开启度主要通过油缸,达到拦水和放水的目的。目前的油缸的动作是通过液压控制系统实现的,而两侧油缸运动同步,闸门不会偏载,启闭机正常安全启闭开度这一过程中磁致伸缩位移传感器起着不可忽视的作用。以下是具体工作的过程:

图1为结构框图。

磁致伸缩位移传感器在闸门启闭机开度应用
磁致伸缩位移传感器在闸门启闭机开度应用

具体实施方式

如图1所示,为集成式启闭机同步控制系统,包括经第一电机控制的第一油缸和经第二电机控制的第二油缸,第一油缸、第二油缸各自连接的活塞杆上分别设置有磁致伸缩位移传感器一和磁致伸缩位移传感器二,位移传感器的输出端与控制单元相连,控制单元为PLC,PLC设有三路信号输出端,用于发出基准信号的第一信号输出端与第一电机控制电路相连接,第二信号输出端连接有变频器,变频器的输出端与第二电机控制电路相连, 第三信号输出端连接有屏幕显示器,PLC还有一路信号输入端与设定信号控制电路的输出端相连。

油缸工作时,设定信号控制电路给PLC输入初始信号,PLC经第一信号输出端将基准信号输出给第一油缸,第一油缸控制活塞杆工作,磁致伸缩位移传感器一将检测到的数据A 反馈给PLC,同时磁致伸缩位移传感器二将检测到的数据B反馈给PLC,PLC通过计算|A-B| ,再经第一信号输出端、第二信号输出端发出控制信号,控制第一点击控制电路、第二电机控制电路工作,以达到第一油缸、第二油缸同步运行的目的,控制单元得到的数据显示在屏幕显示器上。当|A-B|过大时,PLC将发出停止工作指令,以保护闸门,避免闸门发生偏载。

该过程中所有控制指令的传输都是通过电信号的来完成的,与现有技术相比,降低了制造成本和土建工程造价,且控制系统线路简易、 维修方便。位移传感器反馈的数据经控制单元的调控,使得启闭机两侧的油缸能同步运行,避免了闸门的偏载,保证启闭机能正常工作。本实用新型适用于各类钢坝闸门的控制系统。