Lecture and laboratory No. 8 Connection between real and virtual world objects Óbuda University John von Neumann Faculty of Informatics Institute of Applied.

Lecture and laboratory No. 8 Connection between real and virtual world objects Óbuda University John von Neumann Faculty of Informatics Institute of Applied Mathematics Master in Engineering Informatics Course Modeling and design http://users.nik.uni-obuda.hu/lhorvath/ Dr. László Horváth

Dr. Horváth László OE-NIK-AMI http://users.nik.uni-obuda.hu/lhorvath/ The screen shots in tis presentation was made in the CATIA V5 and V6 PLM systems the Laboratory of Intelligent Engineering systems, in real modeling process. This presentation is intellectual property. It is available only for students in my courses. The CATIA V5 és V6 PLM systems operate in the above laboratory by the help of Dassult Systémes Inc. and CAD-Terv Ltd.

Contents Activating and filtering of a cloud Virtual reconstruction of physical surfaces from cloud of points Mesh and its irregularities Scan and methods of its creation Generating curve on scan Creating the free edges of a mesh Laboratory exercise: MD 8.1 Reconstruction of shape on boundary representation body on the basis of cloud of points Ergonomic analysis using manikin model in the context of product model Manikin Attribute Organization Human activity analysis Human measurements Human Posture Analysis László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Virtual reconstruction of physical surfaces from cloud or mesh of points Creating free edges Creating set of curves Generating surface Physical shape Cloud of points Mesh of points Digitizing controlled by algorithm Survey László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Activating portion of imported cloud of points Activating work area on a cloud. Individual points and groups of points are also can be selected in accordance with task. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Homogeneous Filtering. Process: The sphere passes over the cloud, starting on the first point. All the points that are inside the sphere are then hidden. These points are deleted when physical removal is active. In the course of its way, the sphere goes to the next remaining point and removes the points that it contains. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Adaptive Filtering Important! Protecting characteristic lines from filtering and removal. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Mesh Value of neighborhood is specified. However, when suitable points are not found the continuity of mesh can not be provided. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/ A mesh consists of a set of triangles (polygonal faces) providing the neighborhood relation of all points of a cloud. Local irregularities of mesh Triangle that has the same vertex twice. Triangles that share the same (three) vertices. Non-manifold edge: edge is shared by more than two triangles. Non-manifold vertex: vertex is shared by two or more connected shells. Structural irregularities of mesh All the triangles are not oriented in the same direction. Isolated triangles belonging to small connected areas of the mesh.

Definition mesh on cloud László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Scan Chain of selected points on a cloud connected by edges. Methods of scan creation Project curve on cloud Cut a cloud by plane Select points on cloud Create the free edges of a mesh Discretizing curves Scan can be applied at curve generation. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Project curve on cloud László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Cut a cloud by plane and creating curve on scan László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Cut a cloud by planes: resulted set of curves

Definition of multi section surface using scan based curves László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Creating the free edges of a mesh László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Ergonomic analysis using manikin model in the context of product model Investigation of human factor in the context of a product or workplace. Ergonomic analysis for all elements of interactions between human and product. Analysis for cooperation of human with objects in virtual working environment. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Manikin Attribute Organization Part of PPR structure in the V6 system. Structure consists of three main sectors: Body Profiles Settings Creating standard digital human for the purpose of analysis human-product interactions. Generating manikin. Manipulating Manikin. Generating movements. Movements are controlled by forward kinematics. Result Better suitability of a product for form, fit and function. Better comfort, productivity, and security. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Human Posture Analysis Standard poses. Sit Squat Stoop Twist Lean Hand grasp Adjust elbow Based on forward kinematics. Degrees of freedom are denoted by circle. Forward kinematics calculates configuration of the kinematic chain using joint parameters. (Inverse kinematics calculates joint parameters to the specified configuration.) László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/ Elevation, up or down, of the right or left elbow keeping the selected hand and shoulder at a fixed position

Human activity analysis Analysis of lifting, lowering, and carrying Duration and frequency of task Lifting position (initial and final) Connection conditions Proposed and maximal weight Analysis of pushing and pulling Duration and frequency of task Pushing and pulling (initial and final) Connection conditions Proposed and maximal weight László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

Forrás: www.catia.com László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/ Human activity analysis

Human Measurements Source: www.catia.com László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/

MT 8.1 Pontfelhővel definiált alak rekonstrukciója határfelület ábrázolású tömör testen László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/ MD 8.1 laboratory exercise

Modell neve: MT00Txxxx00 Tantárgy Év T vagy O Név Feladat: 81 László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/ MD 8.1 laboratory exercise

László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/ MD 8.1 laboratory exercise

Lecture and laboratory No. 8 Connection between real and virtual world objects Óbuda University John von Neumann Faculty of Informatics Institute of Applied.

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Lecture and laboratory No. 8 Connection between real and virtual world objects Óbuda University John von Neumann Faculty of Informatics Institute of Applied.

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Presentation on theme: "Lecture and laboratory No. 8 Connection between real and virtual world objects Óbuda University John von Neumann Faculty of Informatics Institute of Applied."— Presentation transcript:

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