公开(公告)号：EP1151260B1

公开(公告)日：2004-01-02

申请号：EP00904903.2

申请日：2000-01-13

申请人： HALFEN GmbH & CO. Kommanditgesellschaft

发明人： ERNST, Peter ,  HACK, Axel ,  INAUDI, Daniele, Ph.D.Phys.

IPC分类号： G01L1/24 ,  G01B11/16 ,  G01M11/08

CPC分类号： G01M11/086 ,  G01B11/161 ,  G01L1/242

摘要： The invention relates to a device for determining the bending stress on components, such as bolts (1), which presents one optical waveguide (5) each in the bending tension zone and bending pressure zone of the bolt (1). Via a coupler (9) the two optical waveguides (5) are connected to a light source (12) and an evaluation circuit (14). The opposing changes in length in the two optical waveguides (5) which arise when the bolt (1) is subjected to bending stress are determined by the evaluation circuit (14) on the basis of the interferometry principle.