4 results about "Element space" patented technology

The application relates to the technical field of industrial visual inspection, and discloses a kind of intelligent visual defect detection methods for plastic product production, comprising: based on the continuous texture direction formed by fusion material itself in the weld area image, texture reference structure with sparse topological constraint is constructed;According to the texture reference structure, the weld area image is locally textured element deconstruction, and the texture element space layout embedded in the texture reference structure constraint is obtained;According to the texture reference structure, the topological structure of the texture element space layout in the weld area image is predicted, and the topological abnormal area meeting the texture neighborhood self-correction mechanism is determined;According to the spatial topological correlation between the topological abnormal area and the texture reference structure, the real defect area is extracted;The application realizes the accurate and reliable detection of the defect of the weld area of the plastic product by texture topological structure constraint and spatial layout self-correction, effectively improves the stability and accuracy of the weld quality control.

The application discloses a SWMM and LISFLOOD-FP object-oriented coupling method considering element space forms, first determines SWMM and LISFLOOD-FP element objects to be coupled, including point, point set and surface element objects; then based on element semantic information, different generalization forms of geographical elements in the model are established, and unified space matching rules between SWMM and LISFLOOD-FP models are established; finally, in the consistent time process, the space matching results of different element objects are used for flow exchange and flow distribution. The application supports expression and coupling of point, surface and point set element objects, and establishes element space matching rules based on element semantic information. The application supports unified space expression and flow exchange of element objects according to different form characteristics of elements, and can more accurately describe water accumulation distribution and flow exchange conditions of surface drainage facilities.

The invention discloses a Kirchhoff sheet response adaptive analysis method based on a virtual unit method, and the method comprises the steps: carrying out the virtual unit discretization of a Kirchhoff sheet structure, constructing a virtual unit space, and calculating a unit stiffness matrix and a mass matrix; evaluating a spatial discrete error by adopting a layered grid method, and carrying out grid adaptive refinement on an initial grid; calculating the acceleration, evaluating the time discrete error of the virtual unit, establishing a time discrete error standard to adjust the time step length, and carrying out the adaptive adjustment of the time step length; and integrating evaluation results of the spatial discrete error and the time discrete error, controlling grid refinement and time step length adjustment, and realizing time-space adaptive analysis of the Kirchhoff thin plate response. According to the method, the flexibility and adaptability of the grid are effectively improved, the calculation efficiency is remarkably improved, and the method can be widely applied to thin plate structure analysis and design in the fields of machinery, buildings, bridges, aerospace and the like and has important engineering application value.