The fiber optic sensor measuring system based on the Mech-Zehnder interferometry is
developed in the paper. The system can be used for the strain and vibration measurement of
engineering structure, and has the advantages: convenient adjusting, stable performance and strong
ability of anti-interference, etc. Therefore the fiber optic sensor has been widely used in the
engineering field.
First the system is introduced into measuring the frequency and amplitude of the vibration
subjected to force of the FRP-concrete beam. The fiber optic sensor measuring system and the
electronic measuring system are synchronous used for the measurement. The analysis results of
fiber optic sensor measurement approximate to the results of electronic strain gauge. Then the
system is introduced into experimental stress analysis on the gas pipe, good results is obtained too.
The paper provides new technical equipment for the experimental testing of various engineering
structure using fiber optic sensor, also establishes the technical foundation of the research of smart
structure.