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公开(公告)号：EP0345093A2
公开(公告)日：1989-12-06
申请号：EP89305608.5
申请日：1989-06-02
CPC分类号： G01B11/168 , G01D5/345 , G01L3/12 , G01P3/36 , G01P3/56
摘要： Apparatus is described for measuring torsional displacement between ends 32 and 35 of a hollow rotating shaft 28. Polarised light from the source 12 enters the shaft through apertures 30 and is reflected by a mirror 34 to a retardation plate 38. Plate 38 has a fast axis 42 positioned at an angle A relative to the plane of polarisation 46 of the light when the shaft is positioned with one of the pairs of apertures 30 in alignment with the received light beam 24. The retardation plate produces 0 degree and 90 degree components from the light whose relative intensities depend on any torsional displacement between end 35 of the shaft and end 32. The components are reflected by a mirror 40 and a mirror 34 to a beam splitter 20. A polarisation splitter 54 separates the 0 degree and 90 degree components which are respectively detected by detectors 58 and 62 and their relative intensities measured to determine the torsional displacement.
摘要翻译： 描述了用于测量中空旋转轴28的端部32和35之间的扭转位移的装置。来自源12的偏振光通过孔30进入轴，并被反射镜34反射到相位差板38.板38具有快轴 当所述轴定位成与所述成对的孔30中的一个与所述接收的光束24对准时，所述相对于所述光的偏振面46相对于所述光的平面46成角度A.所述相位差板从所述光 光的相对强度取决于轴的端部35和端部32之间的任何扭转位移。部件被反射镜40和反射镜34反射到分束器20.偏振分离器54分离0度和90度分量， 分别由检测器58和62检测并测量其相对强度以确定扭转位移。
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公开(公告)号：EP0345093A3
公开(公告)日：1990-12-12
申请号：EP89305608.5
申请日：1989-06-02
CPC分类号： G01B11/168 , G01D5/345 , G01L3/12 , G01P3/36 , G01P3/56
摘要： Apparatus is described for measuring torsional displacement between ends 32 and 35 of a hollow rotating shaft 28. Polarised light from the source 12 enters the shaft through apertures 30 and is reflected by a mirror 34 to a retardation plate 38. Plate 38 has a fast axis 42 positioned at an angle A relative to the plane of polarisation 46 of the light when the shaft is positioned with one of the pairs of apertures 30 in alignment with the received light beam 24. The retardation plate produces 0 degree and 90 degree components from the light whose relative intensities depend on any torsional displacement between end 35 of the shaft and end 32. The components are reflected by a mirror 40 and a mirror 34 to a beam splitter 20. A polarisation splitter 54 separates the 0 degree and 90 degree components which are respectively detected by detectors 58 and 62 and their relative intensities measured to determine the torsional displacement.
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