Search

Your search keyword '"Hrabovský, Miroslav"' showing total 37 results
Start Over Author "Hrabovský, Miroslav" Database Complementary Index
37 results on '"Hrabovský, Miroslav"'

1. Optimization of Component Assembly in Automotive Industry.

Author

Křepelka, Jaromír, Schovánek, Petr, Tuček, Pavel, Hrabovský, Miroslav, and Jáně, František

Subjects
INDUSTRIAL robots, AUTOMOBILE industry, MANUFACTURING processes, AUTOMOBILE lighting, ROBOTS
Abstract

This article is devoted to the positioning of glued parts by robots in the process of manufacturing automotive headlights, with the possibility of generalization to the mutual positioning of any 3D object. The authors focused on the description of the mathematical method that leads to the optimization of the robot arm setting and ensures the closest contact of the glued parts. The contact surfaces of the two joined parts are, in the ideal case, identical in shape and their optimal alignment is considered to best align the position of the nominal points on the base part with the position of the control (measured) points on the part manipulated by the robot. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

13. Full theory of speckle displacement and decorrelation in the image field by wave and geometrical descriptions and its application in mechanics.

Author

Horváth, Pavel, Hrabovský, Miroslav, and Ŝmíd, Petr

Subjects
OPTICS, SPECKLE interference, DIFFRACTION patterns, GEOMETRICAL optics, DEFORMATION of surfaces, PHYSICS
Abstract

The paper describes the possibility of using the speckle pattern decorrelation for determination of small deformation tensor components of an elementary object surface area in an optical image field. The relationship between the small-deformation tensor and the speckle field displacement is analysed in detail. The studied problem is presented from the approximation viewpoint of both wave and geometrical optics. [ABSTRACT FROM AUTHOR]

Published
2004
Full Text
View/download PDF

36. Non-invasive monitoring of hydraulic surge propagation in a wounded tobacco plant.

Author

Nožková, Vladimíra, Šmíd, Petr, Horváth, Pavel, Hrabovský, Miroslav, and Ilík, Petr

Subjects
TOBACCO, HYDRAULICS, MICROMETRY, PLANT physiology, PLANT stems
Abstract

Background: When a plant is wounded, a rapid hydraulic surge, acting probably as a systemic signal, spreads from the site of injury throughout the plant and leads to small transient deformation of tissues. So far, the propagation of hydraulic surge has been monitored by contact and thus potentially invasive methods. Results: Here we present a non-invasive optical method, which allows simultaneous monitoring of micrometric shift of two opposite stem margins. The usefulness of this method was demonstrated by the measurement of the hydraulic surge propagation in a tobacco (Nicotiana tabacum (L.) cv. Samsun) after burning of its upper leaf. We have observed transient narrowing the stem below the burned leaf, which started within a few minutes after local burning. The comparison of the shift of the stem margin following vascular trace of the burned leaf and the margin on the opposite side of the stem has revealed that the stem deformation is highly asymmetric. Conclusions: This optical method represents a novel tool to investigate the mechanism of systemic response of plants to local damage. Our results points out the complexity of the relationship between hydraulic surge propagation and stem deformation. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

37. A simulation analysis of an extension of one-dimensional speckle correlation method for detection of general in-plane translation.

Author

Hamarová, Ivana, Smíd, Petr, Horváth, Pavel, Hrabovsky, Miroslav, and Hrabovský, Miroslav

Abstract

The purpose of the study is to show a proposal of an extension of a one-dimensional speckle correlation method, which is primarily intended for determination of one-dimensional object's translation, for detection of general in-plane object's translation. In that view, a numerical simulation of a displacement of the speckle field as a consequence of general in-plane object's translation is presented. The translation components a x and a y representing the projections of a vector a of the object's displacement onto both x- and y-axes in the object plane (x, y) are evaluated separately by means of the extended one-dimensional speckle correlation method. Moreover, one can perform a distinct optimization of the method by reduction of intensity values representing detected speckle patterns. The theoretical relations between the translation components a x and a y of the object and the displacement of the speckle pattern for selected geometrical arrangement are mentioned and used for the testifying of the proposed method's rightness. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results