Design and development of an electronic drive and control system for micro-granular fertilizer metering unit

May, S.C.; Kocabıyık, Habib

doi:10.1016/j.compag.2019.05.048

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…The schematic view of the ARSCM is illustrated in Figure 3 . Unlike the conventional seeding rate control strategies [ 20 , 21 ], the whole sown field in this study can be virtually segmented as small sowing plots whose length and width were a specific feedback distance and the width of the grain drill. The specific feedback distance would be determined by an optimal experiment whose results were described in the Section 3.1 and it did not vary with the speed of the tractor.…”

Section: Methodsmentioning

confidence: 99%

An Adaptive Roller Speed Control Method Based on Monitoring Value of Real-Time Seed Flow Rate for Flute-Roller Type Seed-Metering Device

Liu

Zhao

et al. 2020

Sensors

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In order to obtain desirable crop yields, grain seeds need to be sown at the optimal seed amount per hectare with uniform distribution in the field. In previous grain sowing processes, the seeding rates are controlled by the rotational speed of the flute roller which significantly effects the uniform distribution of the seeds due to disturbances, such as the reduction of the seeds’ mass in the hopper and the change of working length of the flute roller. In order to overcome the above problem, we developed an adaptive roller speed control system based on the seed flow rate sensor. The developed system can monitor and feedback actual seeding rates. In addition, based on the monitoring value of the real-time seeding rates, an adaptive roller speed control method (ARSCM), which contains an algorithm for calculating the seeding rate with a compensation, was proposed. Besides, the seeding performance of the ARSCM and that of the conventional roller speed control method (CRSCM) were compared. The results of constant-velocity experiments demonstrated that the accuracy (SA) and the coefficient of variation (SCV) of the seeding rates controlled by the ARSCM were 94.12% and 6.77%, respectively. As for the CRSCM, the SA and SCV were 89.00% and 8.95%, respectively. Under variable-velocity conditions, the SA and SCV of the proposed system were 91.58% and 11.08%, respectively, while those of the CRSCM were 88.48% and 13.08%, respectively. Based on the above results, this study concluded that the ARSCM is able to replace the CRSCM in practical sowing processes for the optimal and uniform seed distribution in the field.

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Section: Methodsmentioning

confidence: 99%

An Adaptive Roller Speed Control Method Based on Monitoring Value of Real-Time Seed Flow Rate for Flute-Roller Type Seed-Metering Device

Liu

Zhao

et al. 2020

Sensors

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“…Then, a banded fertilizer deposition distribution area was generated along the forward direction of UAV-based MPGFS. Large and accurate discharge rate is the characteristics of the fluted roller fertilizing apparatus [23,24] , which is suitable for variable rate fertilization in precision agriculture [1,25] . The fluted roller fertilizing apparatus was an upper row fluted roller fertilizer discharging device.…”

Section: Structure and Working Principle Of The Mpgfsmentioning

confidence: 99%

Discharge rate consistency of each channel for UAV-based pneumatic granular fertilizer spreader

Wang,

Jiang,

Zhou

et al. 2023

International Journal of Agricultural and Biological Engineering

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Unmanned aerial vehicles (UAVs) are widely being used to spread granular fertilizer in China. Granular fertilizer spreaders equipped with UAVs are mainly centrifugal disc-type and pneumatic. The multichannel pneumatic granular fertilizer spreaders (MPGFSs) have a banded fertilizer deposition distribution pattern, which are more suitable for variable rate fertilization with high precision requirement than the circular deposition distribution pattern of disc-type granular fertilizer spreaders (DGFSs). However, the existing MPGFS has the disadvantage of inconsistent discharge rate of each channel, which affects the uniformity of fertilization. In order to explore the causes of inconsistent discharge rate of each channel, the discrete element method (DEM) and bench test were performed to analysis the discharge process of the fluted roller fertilizing apparatus and distribution of fertilizer in axial direction of fluted roller. The computational fluid dynamics (CFD) was used to simulate the airflow field of pneumatic system to analyze the influence of airflow on the movement of fertilizer particles. The simulation results of the discharge process of the fluted roller fertilizing apparatus showed that the filling velocity at the axial ends of the fluted roller fertilizing apparatus was lower than that of the middle. The reason was that the filling capacity was weak near the wall. The simulated results of the airflow field without partitions showed that the airflow provided by the axial flow fan was rotational, and this caused the particles to move irregularly in the throat, resulting in inconsistency discharge rate of each channel. Based on the analysis of reasons of inconsistent discharge rate of each channel, a MPGFS with partitions in the throat was developed. The discharge rate bench tests were carried out to optimize the partition spacing parameters, and fertilization test was performed to test the performance of the improved MPGFS. The discharge rate test results showed better consistency with partition. The coefficient of variation (CV) of the discharge rate of each channel was 20.16% without the partition and 7.70% with the optimal partition. The fertilizer spreading uniformity bench test results shown that the CV of spreading uniformity of MPGFS without partitions was 15.32%, and that MPGFS with partitions was 8.69%. The partitions design was beneficial to improve the consistency of each channel discharge rate and the uniformity of fertilization. The finding can provide a strong reference to design the MPGFS.

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“…A larger controllable range makes it easier to meet the requirements of discharging a large quantity of granular fertilizer. It is noteworthy that the accurate and stepless control mode of the discharge apparatus have great significance in variablerate application by UAV-based GFS [23]. The relationship between the values of openings of metering devices and the discharge rates will be studied for automatic adjusting.…”

Section: E Evaluation Indicesmentioning

confidence: 99%

Test and Comprehensive Evaluation for the Performance of UAV-Based Fertilizer Spreaders

et al. 2020

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Design and development of an electronic drive and control system for micro-granular fertilizer metering unit

Cited by 10 publications

References 11 publications

An Adaptive Roller Speed Control Method Based on Monitoring Value of Real-Time Seed Flow Rate for Flute-Roller Type Seed-Metering Device

An Adaptive Roller Speed Control Method Based on Monitoring Value of Real-Time Seed Flow Rate for Flute-Roller Type Seed-Metering Device

Discharge rate consistency of each channel for UAV-based pneumatic granular fertilizer spreader

Test and Comprehensive Evaluation for the Performance of UAV-Based Fertilizer Spreaders

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