camera iphone 8 plus apk Analysis of AoR with 3D scan and self developed GUI

Yuan Tan, Bowen Xue, Willibald A. Günthner, Johannes Fottner, Stephan Kessler,
Institute for Materials Handling, Material Flow and Logistics, Technical University of Munich, Boltzmannstraße 15, 85748 Garching, Germany

As a fundamental material property, particle-particle friction coefficient is usually calculated based on angle of repose which can be obtained experimentally. For those extremely symmetrical slope, measurement of the angle becomes less applicable and decisive, for example, three kinds of biomass shown in this video, i.e. olive stones, poplar chips as well as willow chips. In 2007 three types of truncations were discussed for these kind of undesirable cones by Fraczek [1]. But in the previous studies only several sections of one uneven slopes is chosen in most cases, even so standard methods in definition of a representable section are barely found.
We presented an efficient and reliable method from the new technology, 3D scan, which was used to digitize the surface of heaps and generate its point cloud. Then, two tangential lines of any selected section were calculated through the linear least-squares regression (LLSR), such that the left and right angle of repose of a pile could be derived. As the next step, a certain sum of sections were stochastic selected, and calculations were repeated correspondingly in order to achieve sample of angles. Subsequently, different samples were acquired through various selections of sections. By applying similarities and difference analysis of these samples, the reliability of this proposed method was verified.
Based on this method a corresponding graphical user interface (GUI), enhances the efficiency and ease of use for the underlying logical design of stored program. Instead of text-based programming, such as typed command labels and text navigation, the automatic measurement analysis only requires data input from Kinect and simple icons. This video is supposed to show the whole process, from experiment to data processing. Besides second method is also provided for analysis of varying heap forms. Furthermore, coordinate date of heaps generated by DEM simulation could also be imported, so that the experimental and simulation results will be compared with an identical method. With these efforts deviation between experiment and simulation induced by objective and subjective factors, like random selection of a single angle, could be considerably reduced.

[1] J. Frączek, A. Złobecki, J. Zemanek, Journal of food engineering, 83, 17. (2007)

camera iphone 8 plus apk Analysis of AoR with 3D scan and self developed GUI
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Science & Technology	Upload TimePublished on 19 Jun 2017

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