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专利名称：Method and device for contactless
measuring of changes of length onstructural members
发明人：GERNHART, PETER,HINTZ,
GERHARD,SCHNEIDER, PETER,KELLER,GUNTER
申请号：EP86110887.6申请日：19860806公开号：EP0255552B1公开日：19900627
摘要：1. Method for the contactless measurement of changes in length on structuralunits or test pieces by means of a light source (1) and a signal processing device (12), thelight (1') from the light source (1) being directed onto two diaphragms (6a/6b, 6a'/6b'),which in their original position define a predetermined spacing (A) at the structural unit ortest piece (3) and the cross section or measuring aperture (6, 6') of which can beinfluenced by the change in length to be measured, and the light intensity, which isinfluenced by the diaphragm cross section, being determined, converted into an electricalsignal and evaluated as a change in length, characterised in that the light (1') from a laserlight source is directed by way of a beam splitter (2) onto the two diaphragms (6a/6b,6a'/6b'), and that the light is brought together behind the diaphragms (6a/6b, 6a'/6b') ina beam adder (8).
申请人：CARL SCHENCK AG,CARL SCHENCK AG
代理机构：Brandt, Ernst-Ulrich, Dipl.-Phys., Dipl.-Ing.
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