Temperature-compensated Fibre Optic Strain Gauge
A temperature-compensated fibet optic strain gauge (10) for measuring strain of a host structure (5), the strain gauge (10) comprising: a mount (20) having a void (19) separating a first section (17) from a second section (18); a first fiber Bragg grating (FBG) (30); a second fiber Bragg grating (FBG) (40); and removable bridging portions (24) adjacent to the void (19) to connect the first section (17) to the second section (18), the bridging portions (24) being removed after the mount (20) is operatively attached to the host structure (5); wherein a right-side failure proof feature is provided by detecting whether a reflection wavelength reverts to an original Bragg wavelength of the first FBG (40) to indicate whether the first FBG (40) has broken.
Patent Number: US8282276B2
Application Number: US2010850641A
Inventor: Tam, Hwa Ywa | Ho, Siu Lau | Liu, Shun Yee | Lee, Kang Kuen | Lee, Tony Kar Yun | Hon, Chun Cheong | Chan, Hing Keung | Tam, Aiken Yiu Ming
Priority Date: 22 Jul 2008
Priority Number: US8282276B2
Application Date: 5 Aug 2010
Publication Date: 9 Oct 2012
IPC Current: G01K001100
US Class: 374161 | 374208 | 374E01018 | 374E11016 | 385012 | 3740E1018
Assignee Applicant: MTR Corporation Limited
Title: Temperature-compensated fibre optic strain gauge
Usefulness: Temperature-compensated fibre optic strain gauge
Summary: Temperature-compensated fiber optic strain gauge for measuring strain of host structure such as railway track and I-beam. Can also be used in airplane, bridge and train.
Novelty: Temperature-compensated fiber optic strain gauge for measuring strain of e.g. railway track, detects whether reflection wavelength reverts to original Bragg wavelength of upper fiber Bragg grating (FBG) to detect broken upper FBG
光学
光纤
TAM Hwa Yaw
HO Siu Lau
LIU Shun Yee Mic
LEE Kang Kuen (Hong Kong Rails)
HON Chun Cheong (Hong Kong Rails)
CHAN Hing Keung
TAM Yui Ming Aiken
美国
