Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Shawn E. Karr"'
Publikováno v:
Smart Materials and Structures. 4:20-30
Carbon fiber based composite material is of considerable interest for the replacement of steel in large concrete structures, such as bridges, where corrosion is a serious problem. A new two-span concrete highway bridge built in the city of Calgary in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::110e25cb5e4f4e87674d8dfc31d6a644
https://doi.org/10.1088/0964-1726/4/1/004
https://doi.org/10.1088/0964-1726/4/1/004
Autor:
Serge M. Melle, A.T. Alavie, Shawn E. Karr, Kexing Liu, Raymond M. Measures, Trenton G. Coroy
Publikováno v:
IEEE Photonics Technology Letters. 5:263-266
The development of a fiber laser sensor system which permits efficient interrogation of Bragg grating sensors is reported. A tunable erbium doped fiber laser which utilizes a broadband mirror and an intracore Bragg grating reflector in side-pump conf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5ff2595dbfafcc2ccb086e1c029e2e7
https://doi.org/10.1109/68.196025
https://doi.org/10.1109/68.196025
Autor:
Shang Yuan Huang, Raymond M. Measures, R. Lee, Myo Myint Ohn, Trenton G. Coroy, A.T. Alavie, Shawn E. Karr, Robert Maaskant
Publikováno v:
Proceedings of LEOS '93.
A number of major challenges face the practical implementation of Smart Structure technology. One of the most important is concerned with the communication link between the structure's resident fiber optic sensing system and the support structure. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61b1d0dd45d7643671a4439bf05292e8
https://doi.org/10.1109/leos.1993.379102
https://doi.org/10.1109/leos.1993.379102
Autor:
Shawn E. Karr, A. Tino Alavie, Shang Yuan Huang, Robert Maaskant, Myo Myint Ohn, Raymond M. Measures
Publikováno v:
SPIE Proceedings.
Corrosion of steel within bridges and other large concrete structures has become a serious problem and consequently there is growing interest in replacing the steel within such structures with carbon fiber based composite materials. The first highway
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e3db2e7c65df8bdd0e9d22948b019e1
https://doi.org/10.1117/12.187400
https://doi.org/10.1117/12.187400
Autor:
Derek J. Glennie, C. Wade, Sami H. Rizkalla, Raymond M. Measures, Shawn E. Karr, Robert Maaskant, G. Tadros, Myo Myint Ohn, A. Tino Alavie
Publikováno v:
SPIE Proceedings.
The installation of a fiber optic Bragg grating strain sensor network in a new road bridge is described. These sensors are attached to prestressing tendons embedded in prefabricated concrete girders. Three types of prestressing tendons are being moni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48ae4ec62aea1eb84e0c005cbea98023
https://doi.org/10.1117/12.173977
https://doi.org/10.1117/12.173977
Publikováno v:
SPIE Proceedings.
An area of concern for erbium doped Fiber Laser Sensors (FLS) has been the issue of `cost per sensor'. To address this issue and promote the FLS as a viable sensor system, techniques for multiplexing intracore Bragg gratings in serial and parallel fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::017cc6075950767e59d308105af28527
https://doi.org/10.1117/12.166858
https://doi.org/10.1117/12.166858
Autor:
Shang Yuan Huang, G. Fishbein, Robert Maaskant, Derek J. Glennie, Shawn E. Karr, Raymond M. Measures, R. Lee, Myo Myint Ohn, A. Tino Alavie
Publikováno v:
SPIE Proceedings.
A multichannel Bragg grating fiber laser demodulation system capable of interrogating four or more Bragg grating sensors for strain and temperature monitoring has been designed and developed. System configuration and various practical considerations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f35596ddf5b369010bb1c4e8f2fef2c7
https://doi.org/10.1117/12.166850
https://doi.org/10.1117/12.166850
Autor:
Derek J. Glennie, Raymond M. Measures, C. Wade, Myo Myint Ohn, Shawn E. Karr, Robert Maaskant, G. Tadros, A. Guha-Thakurta, Sami H. Rizkalla, A. Tino Alavie, Shang Yuan Huang
Publikováno v:
SPIE Proceedings.
A portable, rugged, and compact 4-channel Bragg grating fiber laser sensor demodulation system was developed for interrogating an array of 20-intracore Bragg grating sensors that we embedded within several of the concrete girders used to support the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac4f6e7a279cade27b36e2cbb5ac9c8a
https://doi.org/10.1117/12.165922
https://doi.org/10.1117/12.165922
Publikováno v:
SPIE Proceedings.
An intracore Bragg grating and a broadband reflector are used as cavity end mirrors of a tunable Erbium-doped fiber laser where the Bragg grating serves the dual purpose of the tuning element and the sensor. This fiber laser sensor (FLS) is integrate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6192d859ba2f598a36062bfe09857b83
https://doi.org/10.1117/12.147987
https://doi.org/10.1117/12.147987
Publikováno v:
SPIE Proceedings.
practical applications because of the non-absolute nature of the measuce-ment. As well, lack of common-mode rejection does not permit the accu-rate measurement of low-frequency strains. Another method uses a passive,wavelength demodulation system (WD
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5fbac412c393d28b1a06bc73d09b753
https://doi.org/10.1117/12.141327
https://doi.org/10.1117/12.141327