Cotton stalk restitution coefficient determination tests based on the binocular high-speed camera technology

Zhang, Bingcheng; Chen, Xuegeng; Liang, Rongqing; Li, Jiali; Wang, Xinzhong; Meng, Hewei; Kan, Za

doi:10.25165/j.ijabe.20221504.6370

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…The average difference between the two leakage rates was 6.01%, so the main reason for the lower pull-out rate of the As can be seen in the results of Tables 4 and 5, under the two clamping structures and the same forward speed, different rotational speeds of the main wheel have a significant effect on the mechanism of pulling off rate and pulling clean rate, and the effect of the difference is large. In the test range, the higher the rotational speed and the higher the breakage rate of the two pulling mechanisms, the lower the net pulling rate [22].…”

Section: Resultsmentioning

confidence: 99%

Comparison and Experimental Study of Cotton Stalk Extraction via Nip Roller Based on Nip Motion Trajectory Equation

Wang,

Zhang,

Huo

et al. 2024

Agriculture

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In the field of straw recycling, a cotton straw-harvesting mechanism is an important piece of agricultural equipment. The mechanistic analysis method of the harvesting mechanism is a major focus of research and development in this field. Currently, in the mechanistic analysis of the cotton straw recycling mechanism, the kinematic and mechanical analysis of the recycling mechanism is generally the main focus. There is not a lot of research based on the quantitative analysis between different recycling mechanisms. In this study, a clamped cotton straw pulling mechanism is optimized and designed, and two different pulling structures are designed. In addition, a two-dimensional modeling and analysis method is used to establish the two-dimensional equations of motion of the two pulling mechanisms, analyze the leakage and breakage rates of the two clamping structures, predict the final pulling effect, and verify the results of the field tests. According to the analysis, the belt-clamping side has more uniform clamping stress and a larger clamping contact area than the chain-clamping side, and the tangential stress on cotton straw is smaller. Based on the field-test verification, the band-clamping side had a higher pulling net rate by an average of 19.32% and a lower missed pulling rate by an average of 6.01% than the chain-clamping side. Therefore, it was determined that the main reason for the lower pulling net rate of the chain-gripped side than that of the belt-gripped side was the higher pulling breakage rate, and the secondary reason was the high leakage pulling rate. Thus, the feasibility and accuracy of the analytical method of this study are verified.

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Section: Resultsmentioning

confidence: 99%

Comparison and Experimental Study of Cotton Stalk Extraction via Nip Roller Based on Nip Motion Trajectory Equation

Wang,

Zhang,

Huo

et al. 2024

Agriculture

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“…The moisture content of cotton stalks directly affects their tensile, compressive, and bending mechanical properties (Zhang et al, 2022). The experimental results can provide a theoretical basis for the follow-up experimental study on bending characteristics of cotton stalks.…”

Section: Experimental Study On Cotton Stalk Moisture Contentmentioning

confidence: 96%

Design and Experimental Study of Horizontal-Shaft Roller-Type Cotton Stalk Puller Based on Response Surface Method

XUE,

GAO,

ZHANG

2024

INMATEH

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In this paper, a new horizontal-shaft roller-type cotton stalk puller was designed to address the problems of weak research on cotton stalk pulling and harvesting machines, poor agronomic adaptability, and insufficient research. First, the physical and mechanical properties of cotton stalk were experimentally studied, the cotton stalk pulling force test was conducted and the moisture content and the bending characteristics of cotton stalk were evaluated. The test results showed that cotton stalk pulling force was positively correlated with the cotton stalk diameter and the bending characteristics were positively correlated with the moisture content but were not evidently influenced by the diameter. Second, with the missed pulling rate and pull-off rate as the evaluation indexes and three independent variables, namely, forward speed, linear speed of stalk pulling rod, and rotation speed of stalk pulling roller, as the influencing factors, a 3D response surface model was established. On this basis, the lack-of-fit term P (p = 0.3650) > 0.05 of the evaluation index—missed pulling rate P1—was acquired, and the P value of pull-off rate P2 was always smaller than 0.0001. Finally, the results demonstrated that the influence of various factors on the missed pulling rate of cotton stalk is significant and followed the order forward speed > linear speed of stalk pulling rod > rotation speed of stalk pulling roller; the significance level regarding the influence on the pull-off rate followed the order rotation speed of stalk pulling roller > linear speed of stalk pulling rod > forward speed. Through the parameter optimization analysis, the optimal parameter combination was obtained which coincide with the model optimization and prediction result. The proposed method provides a basis and experimental reference for studying cotton stalk harvesting machineries.

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“…In the simulation test, the cotton stalk and cotton root particle parameters were set the same. According to the experimental measurements and references [12,[25][26][27]32,[41][42][43], the setting range of discrete element parameters in this paper is shown in Table 3.…”

Section: Establishment Of Particle Models and Setting Of Edem Parametersmentioning

confidence: 99%

Parameter Calibration of Discrete Element Model for Cotton Rootstalk–Soil Mixture at Harvest Stage in Xinjiang Cotton Field

Jiang,

Chen,

Yan

et al. 2023

Agriculture

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Due to the lack of accurate discrete element simulation model parameters in the design optimization process of key agricultural machinery components in the whole mechanization technology system of cotton generation, the optimization and improvement of the machine is restricted to a certain extent. Taking a cotton rootstalk–soil mixture at harvest stage in a Xinjiang cotton field as the research object, the discrete element simulation model of a cotton rootstalk–soil mixture was constructed, and the contact parameters of discrete element simulation were calibrated by combining simulation analysis with a physical test. The discrete element significant-influence parameters of cotton rootstalk–soil mixture were screened by Placket–Burman test, and the optimal range of significant-influence parameters was determined by the steepest climbing test. According to the principle of Box–Behnken test, the quadratic regression model of repose angle and significant parameters was established with repose angle as the response value. Taking the actual repose angle as the target, the Design-Expert software was used to optimize the parameters with significant influence and obtain the optimal combination of parameters. The optimal parameter combination was compared and verified by simulation experiments. The relative error between the simulated repose angle and the physical test was 2.36%. The results showed that the calibrated parameters were true and reliable, which could provide a theoretical reference for the discrete element simulation of cotton rootstalk–soil mixture in a Xinjiang cotton field.

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Cotton stalk restitution coefficient determination tests based on the binocular high-speed camera technology

Cited by 6 publications

References 13 publications

Comparison and Experimental Study of Cotton Stalk Extraction via Nip Roller Based on Nip Motion Trajectory Equation

Comparison and Experimental Study of Cotton Stalk Extraction via Nip Roller Based on Nip Motion Trajectory Equation

Design and Experimental Study of Horizontal-Shaft Roller-Type Cotton Stalk Puller Based on Response Surface Method

Parameter Calibration of Discrete Element Model for Cotton Rootstalk–Soil Mixture at Harvest Stage in Xinjiang Cotton Field

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