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 pap[详细]