A high accuracy measurement method of undershooting error using high-speed camera

In order to improve the, measurement accuracy of undershooting error for suppositional target in short distance and wide field, an undershooting error measurement method with high accurate is proposed based on high-speed photography. The method proposed uses two high-speed cameras, calculates the undershooting error at time of hitting the target through intersection measurement and uses the picture information at the time of hitting the target to work out undershooting error by founding the horizontal projection position in the center of virtue target. System calibration accuracy is little than 1% while measurement accuracy is in 0.22msimilar to0.73m, the measurement error of typical undershooting error is estimated based on analyzing the effects of angles measurement error, axis error, calibration error and date process error on undershooting error measurement accuracy. In addition to the calibration datum of target's spatial position, the horizontal projection position founded in the center of virtue target proposed can be used to calibrate the and modify the axis error and focus error, thereby further improving the measurement accuracy of undershooting error.