Design and test of centrifugal disc type sowing device for 
unmanned helicopter

Song, Cancan; Zhou, Zhiyan; Luo, Xiwen; Lan, Yubin; He, Xingang; Ming, Rui; Li, Keliang; Hassan, Shahbaz Gul

doi:10.25165/j.ijabe.20181102.3757

Cited by 10 publications

(15 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The disc-type spreading device has a simple structure and mainly includes two parts: a particle flow control mechanism and a centrifugal disc [12]. During operation, the centrifugal force generated by the high-speed rotation of the disc will scatter the particle falling on the disc from the control mechanism, forming a larger width [13]. The disc-type spreading device has high work efficiency, but the particle trajectory is complex and will form a ring-shaped deposition distribution area, which is difficult to control.…”

Section: Introductionmentioning

confidence: 99%

“…The pneumatic-type spreading device is mainly composed of a pneumatic diversion channel, which can use high-speed airflow to blow the particles to move along the pneumatic channels at different angles, increasing the control of the particle diffusion area in the air. At present, various types of pneumatic-type spreading devices such as two-channel [16], four-channel [17], five-channel [18], and collection-row types [19] have been developed. In addition, several UAV companies have launched commercial UAV spreading products [20,21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Particle Deposition Distribution of Multi-Rotor UAV-Based Fertilizer Spreader under Different Height and Speed Parameters

Song

Liu

Wang

et al. 2023

Drones

View full text Add to dashboard Cite

As an effective supplement to ground machinery, UAVs play an important role in agriculture and have become indispensable intelligent equipment in the development of precision agriculture. Various types of agricultural UAV-based spreading devices, mainly disc-type and pneumatic-type, have appeared in domestic and foreign markets. UAV-based rice topdressing has gradually become a widely recognized application with great market potential. In the process of UAV-based low-altitude fertilization, due to the existence of the rotor wind field, the environment for particle air diffusion is complex, and the movement trajectory and deposition distribution of fertilizer are affected by many factors, resulting in large differences in the spreading. The flight height and speed have a great influence on particle movement and deposition, and a reasonable combination of work parameters can be used for efficient and high-quality particle deposition. In order to obtain better particle deposition distribution, this paper uses the method of a single flight line to test and analyze the characteristics of particle deposition distribution for fertilization using multi-rotor UAVs at different flight heights and speeds. The effective swath width and deposition uniformity obtained via the simulation of overlapped route superposition were used to optimized the appropriate work parameters to ensure that a reasonable and effective deposition amount can be obtained during actual application. The results show that the flight height and speed and the interaction of both have an important influence on the deposition amount and the effective width, but it is not a simple linear relationship. On the whole, as the flight height increases, the coefficient of variation decreases and the effective width increases, but it is not obvious when the speed is low. For the R20, when the flight speed is 2 m/s, the effective width first increases and then decreases with the increase in flight height, and the difference in the deposition amount at a height of 5 m is larger than that at other heights. Under the three working heights, the effective swath width is the same when the flight speed is 4 m/s and 6 m/s, and the effective swath width is also the same when the speed is 7 m and 9 m. For the T16, when the flight speed is 4 m/s, the deposition uniformity is relatively good, and the effective width increases with the increase in flight height. Therefore, the combination of 7–6 m/s and 9–4 m/s parameters will be the best operating parameters for R20 and T16. However, considering the actual dynamic meteorological environment in the field, the operating height can be appropriately lowered according to the influence of the crosswind during actual operation. The research results of this paper can provide scientific reference and suggestions for further improving the effect of UAV-based fertilization.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Particle Deposition Distribution of Multi-Rotor UAV-Based Fertilizer Spreader under Different Height and Speed Parameters

Song

Liu

Wang

et al. 2023

Drones

View full text Add to dashboard Cite

show abstract

“…Wu et al [13] designed a centrifugal rice broadcast seeding, determined the optimal working parameters through simulation tests, and further verified the feasibility of the broadcast seeding device through bench tests and field tests. Song et al [14][15][16] conducted research on broadcast seeding UAVs, and designed two broadcast seeding devices, one was centrifugal disc-type, the other was pneumatic-type. Centrifugal disc-type seeding device relied on centrifugal force to spread the seeds, and the pneumatic-type seeding device relied on airflow of the fan to blow the seeds out from different directions, which improved the uniformity of the broadcast seeding.…”

Section: Introduction mentioning

confidence: 99%

Development of UAV-based shot seeding device for rice planting

Liu¹,

Zou²,

Xu³

et al. 2022

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

In order to realize the high-quality row seeding operation with unmanned aerial vehicle (UAV) in paddy field, a shot seeding device that can sow five rows of pelleted rice seeds at the same time was designed. The shot seeding device mainly consists of an external grooved wheel seed metering device and five shot seeding modules. The designed external grooved wheel seed metering device can take the seeds out of the seed box and divide the seeds into five parts. The shot seeding module can accelerate the pelleted rice seeds to reduce the impact of the UAV wind on the direction of seed movement. Furthermore, an angle adjustment mechanism for the shot seeding module was used to change the row spacing. The seed metering device test verified that when the speed of the seed metering wheel was 15 r/min, the coefficient of variation of the discharge rate of each row (C.V 1 ) and total seed discharge rate stability (C.V 2 ) were 1.70% and 1.04%, respectively. Image processing technique was used to test the UAV seeding performance. The distribution characteristics of seeds on the ground showed that the number of seeds in each row gradually increased from both sides to the middle in the width direction. According to the statistics, there were 60%-70% of the seeds in each row in the 100 mm width range. The field test showed that when the working height was 1.5 m and the seeding quantity was 38.56 kg/hm 2 , the performance of sowing in rows was obvious, the deviation rate of seeding quantity was 1.89%. After 16 d of sowing, the seeds' emergence rate was stable, and the average emergence rate was 82.63% and the yield was 6775.50 kg/hm 2 .

show abstract

“…Although their work efficiency and profit margins have been significantly improved, it is difficult for these machines to move in deep paddy fields and/or pass through crops where stem leaves are high enough to cover the row spacing [2,3]. In addition, the unacceptable soil and land damage caused by the long-term field application of high-horsepower ground machines should not be ignored [4].…”

Section: Introductionmentioning

confidence: 99%

“…As an improvement, a seed fluted roller designed by Song et al was mounted above the disc to generate a continuous particle flow falling on the disc. The position of the particle flow falling on the disc greatly influenced the distribution uniformity [4]. To generate a nonhollow deposition distribution in the field experiment, Wu et al designed a baffle ring mounted around the disc for particle rebound.…”

Section: Introductionmentioning

confidence: 99%