Design and experiment of centralized pneumatic deep precision fertilization device for rice transplanter

Zha, Xiantao; Zhang, Guozhong; Zhang, Shijie; Hou, Qunxi; Wang, Yan; Zhou, Yong

doi:10.25165/j.ijabe.20201306.5479

Cited by 11 publications

(8 citation statements)

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“…Compared with other variable-rate fertilization devices [12,13], it has obtained a more extensive range of variable-rate fertilizer regulation, achieved variable-rate strip fertilization, and spread fertilization at the target rate of 200~1800 kg/ha. When spreading fertilization, the fertilization amount was controlled by adjusting the outer groove wheel fertilizer discharger, the centrifugal fan controlled the fertilization distance, and the superimposed swing spreading fertilization mode was used to improve the uniformity and accuracy of fertilization [21,25].…”

Section: Discussionmentioning

confidence: 99%

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Design and Experiment of Lightweight Dual-Mode Automatic Variable-Rate Fertilization Device and Control System

Bai

Luo

et al. 2023

Agriculture

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China’s agricultural facilities are developing rapidly and are mainly operated through household contracting. Due to a lack of suitable variable-rate fertilization devices, manual and blind fertilization still widely exists, resulting in fertilizer waste and environmental pollution. Meanwhile, existing fertilization devices cannot simultaneously meet the needs of different fertilization methods for crop cultivation, increasing the cost of mechanized fertilization. This study developed a lightweight dual-mode automatic variable-rate fertilization device and control system for strip fertilization and spreading fertilization. The least squares method was used to analyze the amount of fertilizer discharged per second at different volumes and rotational speeds of the fertilization device. The quadratic polynomial model fits well, with determination coefficients greater than 0.99. The automatic variable strip fertilization and spreading fertilization control models were established. Experiments with strip fertilization and spreading fertilization were carried out. The results of strip fertilization experiments show that the maximum relative error (Re) for granular nitrogen fertilizer (NF) was 6.81%, compound fertilizer (CF) was 6.2%, organic compound fertilizer (OCF) was 6.83%, and the maximum coefficient of variation (Cv) of uniformity was 8.91%. The results of spreading fertilization experiments show that the maximum Re of granular NF was 7.31%, granular CF was 6.76%, granular OCF was 7.43%, the Cv of lateral uniformity was 9.88%, and the Cv of total uniformity was 14.17%. The developed fertilization device and control system can meet the needs of different fertilization amounts, types, and methods for facility crop cultivation at different stages. This study’s results can provide a theoretical basis and technical support for designing and optimizing multifunctional precision variable-rate fertilization devices and control systems.

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Section: Discussionmentioning

confidence: 99%

“…When the rotation speed of the fertilizer shaft is 20 r/min, the maximum coefficient of variation for consistency of fertilization in different rows is 1.49%. When the target fertilization rate was 20, 30, and 40 kg/667 m 2 , the average relative error of fertilization rate in the field test was 3.53% [21].…”

Section: Introductionmentioning

confidence: 95%

Design and Experiment of Lightweight Dual-Mode Automatic Variable-Rate Fertilization Device and Control System

Bai

Luo

et al. 2023

Agriculture

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“…mP represents the weight of damaged seeds among the discharged seeds, (kg). During the experiment, the speed of the discharge is set according to formula (27) (Zha et al, 2020).…”

Section: The Experimental Methodsmentioning

confidence: 99%

Design and Experiment of Combined Cavity-Type Precision Hole-Drop Seed-Metering Device for Rice

SONG,

WAN,

ZHOU

et al. 2023

INMATEH

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In order to solve the problems of unstable seeding quantity and poor applicability of traditional lightweight simplification mechanical seed-metering device, a combined cavity-type rice precision hole-drop seed-metering was developed. According to the material characteristics of rice seed and the requirements of seeding quantity, the innovative metering hole structure achieves the purpose of accurate filling of rice seed. In order to adapt to the demands of different rice seeds and improve the accuracy and convenience of the adjustment of the seeding quantity, the number of cavities involved in seeding operation was simply adjusted. Bench tests are carried out on the effects of the seed-inlet width, the metering hole slope angle, and the cavity outer angle on the precision seeding performance of the seed-metering device. The test results show that when the outer and middle seed-inlets width both are 3.8 mm, the innermost seed-inlet width is 5.4 mm, and the metering hole slope angle is 35 °, and the cavity outer angle is 85 °, the performance of the three kinds of rice was better. Opening outermost seed-inlet to seeding super hybrid rice, the qualified rate is 90.67%, the miss-seeding rate is 3.77%. Opening outer and middle seed-inlets to seeding hybrid rice, the qualified rate is 90.80%, the miss-seeding rate is 3.73%. Opening all three seed-inlets to seeding conventional rice, the qualified rate is 90.67%, the miss-seeding rate is 3.53%. The field test shows the seed-metering device can also meet the requires of these kinds of rice seeding.

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“…The motor driving torque was calculated to be 0.9090 N•m. The motor was powered by the 12 V battery of the tractor and the XD60D94-12Y-50S DC motor of Xinta brand with a rated torque of 1 N•m, which will satisfy the operational requirements [30][31][32] . The structure of the DC motor fertilizer apparatus is shown in Figure 3.…”

Section: Fertilizer Drive Unitmentioning

confidence: 99%

Development of the peanut precision fertilization control system based on threshold velocity algorithm

Yang

Shang

et al. 2022

International Journal of Agricultural and Biological Engineering

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In view of the fact that the current ground wheel velocimetry of the peanut precision fertilizer control system cannot solve the phenomenon of ground wheel slippage, and signal interference and delay loss cannot be excluded by BeiDou positioning velocimetry, a set of peanut precision fertilizer control system was designed based on the threshold speed algorithm. The system used STM32F103ZET6 microcontroller as the main controller, and touch screen for setting the operating parameters such as operating width, fertilizer type, and fertilizer application amount. The threshold speed algorithm combined with BeiDou and ground wheel velocimetry was adopted to obtain the forward speed of the tractor and adjust the speed of the DC drive motor of the fertilizer applicator in real time to achieve precise fertilizer application. First, through the threshold speed algorithm test, the optimal value of the length N of the ground wheel speed measurement queue was determined as 3, and the threshold of the speed variation coefficient was set to 4.6%. Then, the response performance of the threshold speed algorithm was verified by comparative test with different fertilization amounts (40 kg/hm 2 , 50 kg/hm 2 , 60 kg/hm 2 , 70 kg/hm 2 ) under two speed acquisition methods of ground wheel speed measurement and threshold speed algorithm (combination of Beidou single-point speed and ground wheel speed measurement) in different operation speeds (3 km/h, 4 km/h, 5 km/h). The response performance test results showed that the average value of the velocimetry delay distance of the BeiDou single-point positioning velocimetry method was 0.58 m, while the average value of that with the threshold velocity algorithm was 0.27 m, which decreased by 0.31 m and indicated more accurate with the threshold velocity algorithm. The field comparison test for fertilizer application performance turned out an over 96.08% accuracy rate of fertilizer discharge by applied with the threshold speed algorithm, which effectively avoided the inaccurate fertilizer application caused by wheel slippage and raised the accuracy of fertilizer discharge by at least 1.2% compared with that of using the ground wheel velocimetry alone. The results showed that the threshold speed algorithm can meet the requirements of precise fertilizer application.

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Design and experiment of centralized pneumatic deep precision fertilization device for rice transplanter

Cited by 11 publications

References 0 publications

Design and Experiment of Lightweight Dual-Mode Automatic Variable-Rate Fertilization Device and Control System

Design and Experiment of Lightweight Dual-Mode Automatic Variable-Rate Fertilization Device and Control System

Design and Experiment of Combined Cavity-Type Precision Hole-Drop Seed-Metering Device for Rice

Development of the peanut precision fertilization control system based on threshold velocity algorithm

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