Bases on the finite element model,this paper presents a comparative study of the applicability of the frequency changes ratio index,the modal curvature difference index and the static strain difference index for damage detection in suspension bridges in the absence of noise.

A novel method for achieving high resolution for static strain measurement is proposed and demonstrated.

Static strain telemetering technology has been popular used in railway research and development and national economy.

A novel method that static strain is measured in high resolution using fiber Bragg gratings (FBGS) and Fiber Fabry-Perot interferometer (FFPI) was presented.

Aiming at the above problems,the paper introduced design of a portable static strain gauge for anchor used in mine,analyzed measuring principle of strain measurement,and expounded designs of signal conditioned circuit of the strain gauge and its software program.

Gives the basic scheme of static stress and deformation, and discuss some measure technology problem carefully,at last, supports the analysis-method of measure result.