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266 Emilian Moşneguţu et al. 6 – eccentric the shaft, 7 – horizontal longitudinal thrusts, 8 – belt, 9 – vertical rod, 10 – transverse horizontal thrusts, 11 – electric motor, 12 – collection cassette of fractions, 13 – evacuation chute. Values have been determined using a Vibrotest 60. To follow as possible the path exactly of particle solid, on the working surface was limited the distance on which has followed the travel of particle and was draw a marker line in order to be view the particle movements in sideways ( Fig. 4). video camera no. 1 X Fig. 3 – The video cameras location. Fig. 4 – Marks used on oscillating surface. Z O Y video camera no. 2 For obtaining the coordinates of the point followed, regardless of video camera position, was used software SynthEyes, such:
Bul. Inst. Polit. Iaşi, t. LVIII (LXII), f. 4, 2012 267 i) values obtained from the analysis of motion in the plane XOY (Fig. 5) will be determine: the travel time of solid particle on monitoring distance; the solid particle trajectory on oscillating surface; velocity of solid particle; ii) the second video camera (shooting in the plane XOZ) aims to determine the solid particle jumps on which made them at the time they travel on blind sieve (Fig. 6). Fi g. 5. Manner of determining the Fig. 6. Manner of determining the coordinates of point in the plane XOY. coordinates of point in the plane XOZ. 3. Experimental Results In the processing of experimental data was taken into account: focus distance, aiming at the values obtained from the calculation correspond to real coordinates; the angle of the plane surface. So after processing the data obtained with the help of SynthEyes, it could determine: A) Solid particle trajectory on the two planes tracked by video cameras (Fig. 7). B) Tridimensional trajectory of the solid particle moving on the oscillating flat surface, obtained by combining the two trajectories previously presented (Fig. 8); C) Knowing the time to follow the solid particle on oscillating surface and the distance traveled of particle after each frame it’s possible to determine the speed of movement (Fig. 9);
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BULETINUL INSTITUTULUI POLITEHNIC D
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VICTOR COTOROS şi EMIL BUDESCU, As
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