造纸行业纸浆位置闭环控制-opto

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发布日期：2014-04-24 浏览： 次

在造纸工业中，湿纸浆在滚筒的带动下流过真空区域以去除绝大部分水分。形成的纸膜会被运往下个环节。为了防止纸膜上形成水珠，需要用一个激光三角反射式传感器检测纸膜位置。传感器的模拟量输出可以确保对纸膜位置的闭环控制。

In paper production the prepared paper pulpflows onto a conveyor belt of fine wire mesh at the so called "wetend". There most of the water is removed by means of a vacuum. The paperweb is generated and is transported to the second station, the wet pressrollers, which determine the paper web speed by means of a second drive unit.In order to avoid tears in the paper web a laser position measuring system isused here which measures the position of the paper web between the twostations. The analog output signal of the sensor is fed into a closed-loop controlcircuit which influences the motor speed at station 1 and thereby ensures thata specified set point distance value is maintained.

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