SHODOS was a 3-year EPSRC/DTI Link project to measure strain in concrete bridges. Kent had a 2-year involvement to develop a scheme for multiplexing up to 128 sensors. In-fibre Bragg-gratings (FBGs) were the chosen sensing elements as they provide information on both local strain and temperature. Target resolutions were 1me and 0.1 degrees C.

Multiplexing Scheme:

 

Test arrangement for 16 FBG Sensors:

 

Staff Involved

Prof. D.A. Jackson
Dr. P.J.Henderson
Dr. D.J. Webb