The Design And Realization Of The Surface Defect Detection System Of The Inner Bore Of The Barrel

After a long-term use of smoothbore guns,the inner wall of the barrel of the artillery tube will have phenomena such as coating shedding and ablation,which will directly affect the shooting accuracy and safety of the artillery in use.Therefore,it is particularly important to inspect the barrels of artillery that have been used for a long time.Most of the existing bore detection technologies mainly use image detection technology to detect the width and area of the defect,but the accuracy of the detection result is low and it is not easy to detect the depth of the defect.Therefore,this paper designs a detection system for the surface defects of the smoothbore barrel,and proposes a defect detection method that combines image detection technology and laser displacement detection technology to simultaneously detect the width,depth,area and other parameters of the defect.If only the laser displacement detection technology is used in the process of detecting the defects in the body tube,the detection process will take too long,which will affect the detection efficiency.Therefore,the system first uses image detection technology to realize the detection of inner bore defects,and then uses laser displacement detection technology to achieve accurate measurement of defects.When the system is working,the panoramic image of the inner bore of the barrel is expanded into a rectangular image through the panoramic image expansion algorithm,and then the expanded image is equalized and binarized to realize the detection of defects on the inner wall of the barrel and the axis of the defects.Positioning of the approximate range of the position;after determining the axial position range of the defect,use the walking mechanism to carry the laser displacement sensor into the bore of the barrel,scan the defect position step by step and collect the inner bore surface displacement data at that position,and then check The collected displacement data is processed and analyzed to realize the construction of the three-dimensional contour of the defect position,and finally combine the axial position of the walking mechanism in the barrel and the design size of the walking mechanism to further analyze and calculate the accurate data of the depth,width and area of the defect,Realize the accurate measurement of the characteristic quantities such as the axial position,width,and depth of the defect.Design experiments to verify the functionality of the system.The experimental results show that the maximum error of the system for detecting the axial position of the defect does not exceed 3mm;the maximum error of the measurement of the width of the defect does not exceed 0.5mm;the maximum error of the measurement of the depth of the defect No more than 0.03mm;the measurement error of the defect area is no more than±3 mm~2.Through the analysis and comparison of the experimental results and the system design indicators,it is proved that the barrel surface defect detection system meets the system design indicators.The system has high reliability and has practical significance in the maintenance and maintenance of the barrel.