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Wyszukujesz frazę "displacement parameters" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Measurement of agglomerate shape using three-dimensional reconstruction based on a laser displacement sensor
Autorzy:
Zavala De Paz, J. P.
Castillo Castañeda, E.
Soto Herrera, J.
Turchiuli, C.
Powiązania:
https://bibliotekanauki.pl/articles/220899.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
agglomerated particles
laser displacement sensor
shape parameters
three-dimensional reconstruction
Opis:
The agglomeration of particles is a process that modifies the physical properties of a product originally manufactured as a powder. During milk powder agglomeration of fluidized bed, resulting agglomerates are sufficiently porous to improve the solubility of the final product but, at the same time, their rigidity decreases and agglomerates can be destroyed during packing. The porosity and rigidity properties depend on both the volume and shape characteristics of the agglomerates. This paper presents a three-dimensional reconstruction technique based on a laser displacement sensor (LDS) applied to characterize milk agglomerates. This technique allows three-dimensional scanning to estimate particle volume and extract shape parameters such as: sphericity, elongation and flatness ratio, shape factor and aspect ratio. This technique was implemented using a mechatronic device with two degrees of freedom. The device is composed of an angular positioning system to rotate the agglomerate and a linear positioning system to displace the LDS. Experimental result allows agglomerates classification according to shape parameters.
Źródło:
Metrology and Measurement Systems; 2013, 20, 3; 407-418
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Roadway support design based on in-situ stress and its asymmetrical distributions in a coal mine
Autorzy:
Guo, Hongjun
Ji, Ming
Zhao, Weisheng
Powiązania:
https://bibliotekanauki.pl/articles/218766.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kopalnia węgla
droga transportowa
transport kopalniany
in-situ stress
the stress in the rock surrounding roadway
the displacement in the rock surrounding roadway
the plastic zone in the rock surrounding roadway
support parameters
Opis:
Through in-situ stress measurements, stress data were obtained from an auxiliary transportation roadway in a coal mine in Shanxi Province, China. Based on the principles of elastic mechanics and using a generalized plane strain model, the mechanical effects of the in-situ stresses on an idealized roadway were calculated and the distributions of stresses, displacements, and plastic zones determined. Building on this model, the vulnerable zones in the roadway cross section were identified. Ground support specifications were developed and during specification design, comprehensive consideration was given to factors affecting the stability of the rock surrounding the roadway. A scientific and reasonable support scheme was put forward. Practical experience in the coal mine shows the normal forces of anchor bolt and cable, the minimal convergence of roof to floor, and a generally good support in the auxiliary transportation roadway. The support should ensure safe production during its service life. This study provides a new method for designing roadway support systems that can be particularly valuable for high-stress roadways.
Źródło:
Archives of Mining Sciences; 2020, 65, 2; 299-315
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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