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Mechatronics of classifying of microparticles by air separation
Adamčík, Martin ; Svěrák, Tomáš (referee) ; Pellant, Karel (advisor)
The aim of presentated bachelor’s thesis is exploration of the possibilities of classifying the microparticles according to the size of particles of the material and modelling the specific classifier and its parts in 3D system. This thesis describes in detail air separation method, its utilization and benefits. For this purpose, in thesis are solved those particular problems. a)Description of the classification process. Definition of the particle size distribution, discussion the influence of the classifier parameters to the particle size distribution. b)Analysis of particular devices used for classification of particles in the process. c)Engineering design of the classification system of the air classifier. d)Modelling out designed device in the 3D system.
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Infuence of eardrum position on sound transmission
Krbálek, Jaroslav ; Dušek, Daniel (referee) ; Pellant, Karel (advisor)
The human eardrum is inclined at an angle of 50 ° t o the axis of external auditory canal. The main objective of this thesis was to determine the impact of the inclination on sound transmission characteristics of external ear canal. It was observed influence of the various features of the eardrum and of the malleus weight on calculated transmission characteristics. Simple finite element model (FEM model) was created in the ANSYS program. The acoustic subsystem of the outer ear tube, elastic eardrum and solid malleus were created. The external ear canal model was modeled as one sided open cylinder which was terminated diagonally bedded with eardrum. In addition to the impact of the eardrum inclination, the influence of the eardrum elasticity and the weight of malleus on the sound transmission characteristics of external ear canal was also monitored. The eventual presence of the coincidence effect was also studied.
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