Dynamic deformation measurement of real bridge using sampling moire camera

Sampling moire method is one of the convenient phase analysis methods. The accuracy of phase difference analysis is from 1/100 to 1/1000 of the grating pitches. This method is useful to a real-time measurement because the phase analysis can be performed from a single-shot image. In this paper, we developed a sampling moire camera which can analyze grating phase in real-time. This camera can measure dynamic deformation of a structure in real-time. Applications for dynamic deformation measurement of a real bridge are demonstrated.