The Study for the Influence of Binocular Vision Angle on the Measuring Accuracy of Ship Pipe Fitting Length
The measurement of pipe fitting length is an important process of pipe fitting machining and testing.The traditional contact measurement method has the problems of low efficiency,poor precision and high cost.As an intelligent and real-time measurement method,non-contact measurement has the advantages of high precision,low cost and fast measurement speed,among which binocu-lar vision measurement is a commonly used method for measuring small and medium-sized parts.However,there are still some prob-lems in the measurement of large parts.For example,the size of ship pipe fittings is generally large,and it is difficult to collect data,which affects the measurement accuracy.The experimental results show that the measurement accuracy is sensitive to the shooting Angle,mainly because the shooting Angleaffects the number of noise points generated on the inner wall of the pipe fitting,and then af-fects the fitting accuracy of the center of the circle and the measurement accuracy of the size.Aiming at this problem,this study carried out a study on the relationship between the measurement accuracy and the shooting Angle.It was found that under the same radius,when the optical axis of the camera was in the same direction with the pipe fitting axis,the noise generated by the reflection on the inner wall was less,the position of the fitting center of the circle was more accurate,and the measurement result had a higher accuracy.With different radii,the larger the radius is,the more sensitive the shooting Angle is.By comparing the experimental measurement results with the three-dimensional measurement results,it is found that when the shooting Angleis[87°,93°],the measurement accuracy is the highest,and the measurement accuracy can reach(±0.230)mm,which is 77% higher than that of the traditional tape measure.
Shooting AnglePipe LengthOptical MeasurementCenter of Circle Fitting
NETL
NSTL
万方数据
维普
