Method for detecting spherical center space position of angular spherical surface in discontinuous area
A technology of spatial position and detection method, applied in the direction of measuring device, optical device, image analysis, etc., can solve the problems of easily damaged product surface and low efficiency
Active Publication Date: 2021-09-14
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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Incomplete and small-area measurement is a difficult point in the field of measurement. It uses locally available information to describe global parameters. Traditionally, contact three-coordinate measurement methods are used, which has low efficiency and is easy to damage the surface of the product.
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[0057] A method for detecting the spatial position of the angular spherical center in a discontinuous area, such as Figure 4 shown, including the following steps:
[0058] (1) Obtain the point cloud of the angular spherical target area;
[0059] Use line laser scanning to collect point clouds of angular spherical target areas (all angular spherical surfaces on heterogeneous products), such as figure 2 As shown, considering the large number of point clouds extracted from all angular spherical surfaces, the processing is very complicated. Therefore, in the actual implementation, all angular spherical surfaces can be segmented by setting the spatial range, and the segmentation area of interest can be selected from it. Point cloud extraction, thereby reducing the amount of computation. Further, in order to improve the measurement accuracy, bilateral filtering is performed on the extracted point cloud to obtain the filtered point cloud. Among them, the basic idea of bilate...
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The invention discloses a method for detecting the spherical center space position of an angular spherical surface in a discontinuous area. The method comprises the following steps: acquiring a point cloud of an angular spherical surface target area; acquiring a sphere axis space equation of the angular spherical surface according to the point cloud; clustering the end points corresponding to the points in the point cloud by adopting a K-means clustering algorithm to obtain a clustering center of the end points; and obtaining the center of the angular spherical surface according to the sphere axis space equation and the clustering center. According to the method for detecting the spherical center space position of the angular spherical surface in the discontinuous area, contact with the surface of a product is avoided in the detection process, and damage to the product is avoided.
Description
technical field [0001] The invention relates to the technical field of industrial measurement, in particular to a method for detecting the spatial position of the center of an angular spherical surface in a discontinuous area. Background technique [0002] Heterogeneous products have multiple branch angles, and each branch angle is represented as a small angular spherical surface, such as figure 1 As shown, in the assembly process, it is necessary to detect the spatial position of the center of the sphere formed by multiple angular spheres. Incomplete and small-area measurement is a difficult point in the field of measurement. It uses locally available information to describe global parameters. Traditionally, contact three-coordinate measurement methods are mostly used, which has low efficiency and is easy to damage the product surface. Contents of the invention [0003] The purpose of the present invention is to provide a method for detecting the spatial position of the ...
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IPC IPC(8): G01B11/00G01B11/24G06K9/62G06T7/73G06T7/66
CPCG01B11/002G01B11/24G06T7/73G06T7/66G06T2207/10028G06T2207/20028G06F18/23213
Inventor 于长志刘延龙李芳张连新孙鹏飞曹宇付磊肖虹
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS