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位置传感器是液压压下厚度自动控制的基本元件,它用来检测油缸的位移,从而检测了辊缝的位移,作为液压压下的基本环节——位置环的反馈信号。位置传感器是液压压下由繁向简演变的关键元件,它在机床工业上应用得较早,型式很多。在国外,六十年代才开始应用在轧机上。目前已见到的位置传感器有四种型式:差动变压器、感应同步器、磁尺和光栅等。英国、法国和西德采用差动变压器和光栅较多,日本和美国采用感应同步器和磁尺较多。武钢从西德引进的1700mm冷轧机采用光栅;涿县铝加工试验厂从日本引进的1600mm冷轧机采用同轴磁尺,放在油缸中间。目前,我国已能生产差动变压器、感应同步
Position sensor is the basic component of the automatic control of the thickness of the hydraulic pressure, which is used to detect the displacement of the cylinder, which detects the displacement of the roll gap, as the hydraulic pressure of the basic part - the feedback signal of the position loop. The position sensor is a key component of the hydraulic pressure reduction from simple to simple, it is applied in the machine tool industry earlier, a lot of types. Abroad, the sixties began to be used in rolling mills. There are four types of position sensors that we have seen so far: differential transformers, inductosyn, magnetic scales and gratings. Britain, France and West Germany use more differential transformers and gratings, Japan and the United States using induction synchronizers and magnetic ruler more. The 1700mm cold rolling mill introduced by WISCO from West Germany uses grating. The 1600mm cold rolling mill introduced from Japan by Yixian aluminum processing pilot plant uses a coaxial magnetic ruler and is placed in the middle of the cylinder. At present, China has been able to produce differential transformer, induction synchronization