A zonal detection method for the coloring area of ​​the ball seat of a ball joint and the fitting degree of the coloring area

Abstract

The invention provides a partition detection method for the painted area of ​​a ball seat of a ball joint and the bonding degree of the painted area. A grayscale camera is used to obtain a top view of the assembled ball seat that has been painted by the ball pin. In the Matlab environment, all the pixels of the overhead view are traversed, and after image preprocessing to eliminate noise, edge detection is performed on the gray image above based on the region growth method of seed points, so as to obtain the distance of each pixel where the boundary line of the painted area of ​​the ball seat is located. Coordinate values, and further divide the area within the above boundary line twice, and finally determine the area of ​​the inner spherical surface of the ball seat represented by the different fit degrees in the colored area of ​​the ball seat based on the size range of the gray value of the pixel point. The detection results obtained by the detection method of the present invention have good stability and true and reliable data, and at the same time provide real and effective basic data for other related experiments on ball joints, thus improving the detection efficiency in the entire detection chain of ball joint products .

Description

technical field [0001] The invention relates to ball seat coloring and segmental detection technology of ball joints, in particular to a segmental detection method of the ball seat coloring area and the bonding degree of the coloring area in the ball joints of automobile suspension, swing arm and bogie series. Background technique [0002] The ball joint is a kind of space connection hinge, which is mainly composed of three parts, the ball pin, the ball seat and the ball sleeve. The ball joint structure only allows the two parts to rotate relative to the common center of the ball, limiting their relative movement in three directions. Therefore, according to the cylinder height of the ball sleeve and the size of the inner and outer diameters, the ball pin can rotate around the central axis of the cylinder. Rotate or swing, thereby forming a spherical pair. In the mechanical field, especially the ball joint in the automotive field, there are conditions such as high temperatur...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, a method for measuring the painted area of ​​the ball seat based on the grayscale image digital processing technology and a partitioned detection method for the painted area are provided, which solves the problem of using manual experience to judge the painted area. The resulting inspection and testing standards are not uniform and the stability of ball seat product detection is poor. At the same time, grayscale images are used instead of color digital images to further solve the problem of large boundary line judgment errors caused by the low degree of boundary recognition and low degree of automation of color digital images. , the problem of low efficiency, the detection method of the present invention is easy to operate, the standard is unified and the comprehensive detection cost is low

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