Development and performance evaluation of dehusked coconut grading machine

2021 ◽  
Author(s):  
A. Asha Monicka ◽  
T. Pandiarajan ◽  
S. Ganapathy
Keyword(s):  
Performance Evaluation ◽  
Inclination Angle ◽  
Gravitational Force ◽  
Tangential Force ◽  
Performance Tests ◽  
Belt Conveyor ◽  
Significance Level ◽  
Belt Speed ◽  
And Performance

AbstractThe objective of this research is to develop a dehusked coconut grading machine for coconut cultivators and entrepreneurs. The basis of design is characterized by a tapered belt conveyor and sizing board with openings of increasing aperture which run along the edge of the belt conveyor. Dehusked coconuts are fed onto the tapered belt conveyor where the gravitational force pushes the nut towards the edge until it comes in contact with sizing board. Due to the tangential force, the nut reels along the sizing board, where dehusked coconuts are graded and allowed to fall through aperture according to their sizes. Performance tests indicated that the inclination angle and velocity of the belt significantly affected contamination ratio, grading efficiency and capacity at 5% significance level. The most efficient configuration for fully husked coconut and semi husked was a belt speed of 1.3 m/s with the inclination angle of 15° and belt speed of 1.5 m/s with the inclination angle of 15° respectively. The machine is acceptable by coconut growers and entrepreneurs.

scholarly journals Computer Aided Modeling of Wood Chips Transport by Means of a Belt Conveyor with Use of Discrete Element Method

2020 ◽  
Vol 10 (24) ◽  
pp. 9091
Author(s):  
Łukasz Gierz ◽  
Łukasz Warguła ◽  
Mateusz Kukla ◽  
Krzysztof Koszela ◽  
Tomasz Szymon Zwiachel
Keyword(s):  
Discrete Element Method ◽  
Analytical Model ◽  
Inclination Angle ◽  
Numerical Test ◽  
Discrete Element ◽  
Conveyor Belt ◽  
Wood Chips ◽  
Belt Conveyor ◽  
Belt Speed ◽  
Element Method

The effectiveness and precision of transporting wood chips on the transport trailer or hopper depends on an inclination angle, a conveyor belt speed, and length. In order to devise a methodology aiding designing and the selection of technical and performance parameters (aiding the settings of conveyor belt sub-assemblies), the authors carried out the simulation tests concerning wood chips transport on the belt conveyor and their outlet. For the purposes of these tests, a simulation model was performed in the Rocky DEM (discrete element method) software in the numerical analysis environment and compared to analytical tests. The tested wood chips were taken from cherry plum branches chipping processes (Prunus cerasifera Ehrh. Beitr. Naturk. 4:17. 1789 (Gartenkalender 4:189-204. 1784)), out of which seven basic fractions were separated, which differed mainly in terms of their diameter from 5 mm to 50 mm and the length of 150 mm. The article presents the results of wood chips ejection distance in the form of the 3D functions of wood chips ejection distance depending on the conveyor belt inclination angle and belt speed. The results are presented for five conveyor belt lengths (1 m, 2 m, 3 m, 4 m, 5 m). The tests also involved the conveyor belt inclination angle in the range from 10° to 50° and the belt velocity in the range from 1 m/s2 to 5 m/s2. The numerical test results demonstrate higher average values of wood chips ejection distance than designated in the analytical model. The average arithmetical difference in the results between the numerical and analytical model is at the level of 13%.

scholarly journals Design and Performance Evaluation of a Cherry Tomato Calyx Remover

2021 ◽  
Vol 11 (22) ◽  
pp. 11016
Author(s):  
Yeongsu Kim ◽  
Seokho Kang ◽  
Hyunggyu Park ◽  
Seungmin Woo ◽  
Daniel Dooyum Uyeh ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Optimal Design ◽  
Removal Rate ◽  
Performance Tests ◽  
Cherry Tomato ◽  
Design Factor ◽  
Tomato Variety ◽  
Damage Rate ◽  
And Performance

A prototype for the remover of cherry tomato calyxes was designed and manufactured. The tap remover was designed and manufactured considering the conveyor transport speed, brush length and clearance, and diameter. These were adjusted in three levels to determine the optimal design factor. Performance tests were conducted using Icon 513, a circular-shaped cherry tomato variety, and Minimaru, a jujube-shaped cherry tomato variety. Conveyor transport speeds were set at 210, 280, and 350 mm/s; brush lengths at 70, 80, and 90 mm; brush clearances at 20, 22, and 24 mm; and brush diameters at 0.8, 1.0, and 1.2 mm. The two varieties showed a similar damage rate during calyx removal. However, Minimaru showed a higher calyx removal rate than Icon 513, indicating that it is most suitable for the calyx removal mechanization process.

scholarly journals Health State Prediction and Performance Evaluation of Belt Conveyor Based on Dynamic Bayesian Network in Underground Mining

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Xiangong Li ◽  
Yuzhi Zhang ◽  
Yu Li ◽  
Yujie Zhan ◽  
Lin Yang
Keyword(s):  
Performance Evaluation ◽  
Bayesian Network ◽  
Evaluation Model ◽  
Dynamic Bayesian Network ◽  
Operating Conditions ◽  
Monitoring Data ◽  
Health State ◽  
Belt Conveyor ◽  
State Prediction ◽  
And Performance

To deal with the problem of weak prediction and performance evaluation capabilities of traditional prediction and evaluation methods, a method of health state prediction and performance evaluation of belt conveyor based on Dynamic Bayesian Network (DBN) is proposed. First, the belt conveyor sensor monitoring data are preprocessed to obtain the feature data set with labels. At the same time, qualitative and quantitative analyses and interval discretization are carried out from belt conveyor fault-causing elements to construct the DBN network. Then, the sample data are applied to the DBN network for training, and the DBN-based prediction and performance evaluation model is established. Finally, taking the real-time monitoring data of a belt conveyor in an underground mine as an example, a DBN-based belt conveyor health prediction and evaluation model is constructed to evaluate and predict the health of the equipment. The results show that the model could identify different operating conditions and failure modes and further improves the prediction accuracy.

scholarly journals The Effect of Guided Inquiry Model through Practicum Learning on Psychomotor Ability of Class XI MIA Students in MAN 10 Jombang

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mucharommah Sartika Ami ◽  
Khairatul Ummah ◽  
Ospa Pea Yuanita Meishanti
Keyword(s):  
Observation Data ◽  
Performance Tests ◽  
Learning Tools ◽  
Guided Inquiry ◽  
Significance Level ◽  
Inquiry Based Learning ◽  
A Value ◽  
Interview Guide ◽  
And Performance ◽  
Psychomotor Ability

This study aims to determine the effect of guided inquiry models through practicum learning on the psychomotor abilities of class XI MIA students in MAN 10 Jombang. The method used is quantitative with a pre-experimental design in the form of one group pretest-posttest. Data collection was carried out through interviews, observations, and performance tests. The instruments used include interview guides, guided inquiry-based learning tools, learning implementation observation sheets, and students' psychomotor ability assessment sheets. The interview guide was used to conduct a needs analysis and interviews were conducted with biology teachers at MAN 10 Jombang. Guided inquiry-based learning tools were used to carry out guided inquiry-based practicum learning in this study. The number of samples of students used in this study was 15 people. The observation data on the implementation of learning were analyzed descriptively, while the data on the psychomotor abilities of students were analyzed parametrically using SPSS version 25.0 software. Guided inquiry-based practicum learning in this study was carried out well with a percentage of 79.4%. The psychomotor abilities of students at the posttest stage increased by 40% compared to the pretest stage. At the pretest stage, six students had very poor psychomotor abilities, while at the posttest stage there were no students with very poor psychomotor abilities. The results of the product-moment analysis show that the guided inquiry model through practicum learning has a significant effect on the psychomotor abilities of students, with a value of 0.769 and a significance level of 5%. The results of the regression analysis showed that guided inquiry-based practicum learning had an effect of 59.1% on the increase in students' psychomotor abilities. Based on the results of this study the teacher can apply guided inquiry-based practical learning to train or improve the psychomotor abilities of students.

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