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Title: Temperature-compensated fibre optic strain gauge
Authors: Tam, Hwa-yaw
Ho, Siu-lau
Liu, Shun Yee Michael
Lee, Kang Kuen
Lee, Tony Kar Yun
Hon, Chun Cheong
Chan, Hing Keung
Tam, Aiken Yiu Ming
Issue Date: 14-Sep-2010
Source: US Patent 7,796,844 B2. Washington, DC: US Patent and Trademark Office, 2010.
Abstract: 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. (See article file for the details of the abstract.)
Rights: Assignee: The Hong Kong Polytechnic University.
Assignee: Mass Transit Railway Corporation Limited.
Type: Patent
Appears in Collections:Patents of PolyU
EE Patents

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