公开(公告)号：US20180258917A1

公开(公告)日：2018-09-13

申请号：US15913277

申请日：2018-03-06

Applicant: Hitachi, Ltd.

Inventor： Ryo UETA ,  Mitsuru SAEKI

IPC: F03D17/00 ,  F03D1/06 ,  G02B6/44 ,  G02B6/02 ,  G01L1/24 ,  G01N21/95

CPC classification number: F03D17/00 ,  F03D1/0675 ,  F05B2240/2211 ,  F05B2240/912 ,  F05B2270/804 ,  F05B2270/808 ,  F05B2280/6003 ,  G01B11/18 ,  G01L1/242 ,  G01L1/246 ,  G01L1/26 ,  G01M5/0016 ,  G01N21/95 ,  G01N2201/0873 ,  G01N2201/088 ,  G02B6/02076 ,  G02B6/4432 ,  Y02E10/721 ,  Y02E10/726 ,  Y02E10/728

Abstract: To provide a wind turbine blade or a wind power generation device provided with a strain detecting system having a high level of soundness. The blade includes a structural material constituting the blade, plural optical fibers 15A and 15B arranged within or on a surface of the structural material, and an optical cable 16A that connects adjacent ones of the optical fiber sensors, and a length of the optical cable 16A is longer than the shortest distance between the adjacent optical fiber sensors.