Research on the Effects of Calibrated Position on Digital Image Correlation Measurement of Dual Camera in Engineering Application

To explore the influence of calibration position on digital image correlation measurement of dual cameras in engineering application, an experimental method of displacement stepping for digital image correlation measurement of dual cameras under different calibration locations is designed. Through precise displacement stepping of samples, the results of digital image correlation measurement and dial gauge measurement are compared. The influence of different calibration locations on the measurement results of digital image correlation method with dual cameras is analyzed. The results show that when the calibration position and collection conditions are unified, there will be no large displacement measurement error, and the discreteness of repeated measurement results is relatively small. The calibration position has more influence on the measurement of ordinary glass in the measuring optical path than that of quartz glass. The relative error caused by calibration position is relatively large for small displacement measurement and relatively small for large displacement measurement