Rule definition method for product data format of random hollowed-out structure
A technology of hollow structure and product data, which is applied in image data processing, electrical digital data processing, special data processing applications, etc. It can solve the problems that the internal information description of products with hollow structure cannot be randomly described, so as to save data storage space and simplify the definition method Effect
Inactive Publication Date: 2018-06-05
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF4 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The invention proposes a rule definition method for the data format of random hollow structure products, which solves the problem that the 3D model data format in the prior art cannot accurately describe the internal information of random hollow structure products
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0029] Such as figure 1 The product data format definition method of a random hollow structure shown is as follows:
[0030] (1) Define the surface model of the random hollow structure, figure 1 The sdf tag defines the boundary of the product as a ring with an inner diameter of 4 and an outer diameter of 10. The lambda defines an anonymous function that performs a Boolean difference between a circle with a radius of 10 and a circle with a radius of 4, thus defining a product model whose boundary is a ring structure. The basic form of the lambda operator is lambda x:body. Here you can regard x as the input parameter of a function, and body as the return value of this function. However, unlike functions in ordinary programming languages, x can be an ordinary value variable, a function, or a type, so the lambda operator can be used in the data format. Complex product boundaries can be formed by combining Boolean operations on basic elements such as circles, rectangles, sphere...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a rule definition method for a product data format of a random hollowed-out structure. The method comprises the following steps that a boundary condition of a random hollowed-out structure model is defined; internal characteristics of the random hollowed-out structure model are defined; according to a defined boundary of the random hollowed-out structure model, a three-dimensional Voronoi graph is subjected to Boolean difference operation, and rule definition for the product data format of the random hollowed-out structure is completed. The rule definition method has theadvantages that the definition method is simple, precise facet information of the random hollowed-out structure model does not needed to be defined, the boundary and hole center and scaling information of the random hollowed-out structure only need to be stored, and the data storage space of a product is saved. Compared with other data formats, the hole center and scaling information can be adjusted according to demands, and a porous structure is edited for the second time. By adopting the rule definition method, a three-dimensional model of the product of the random hollowed-out structure can be obtained and converted into a facet model, and the random hollowed-out structure can be directly manufactured through a 3D printing technology.
Description
technical field [0001] The invention relates to the technical field of computer-aided modeling and product structure design, in particular to a rule definition method for random hollow structure product data format. Background technique [0002] Many substances in nature have complex internal structures, such as wood, sponge, coral, bone, etc. are substances with complex hollow structures. Hollow structures have attracted extensive attention from academia and industry due to their light weight, high strength, and good energy absorption. Although there are many design and manufacturing methods for hollow structures, most of them are based on traditional manufacturing methods. With the development of additive manufacturing (AM) technology, hollow structures with greater design freedom can be manufactured. [0003] With the development and wide application of computer-aided design (CAD) technology, the product data exchange format and standardization technology have also devel...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G06F17/50G06T17/00
CPCG06T17/00G06F30/20
Inventor 赵正旭张登辉郭阳任利敬赵卫华
Owner QINGDAO TECHNOLOGICAL UNIVERSITY