Design and experiment of automatic transplanting device for potted tomato seedlings

Jin, Xin; Zhao, Kaixuan; Ji, Jiangtao; Ma, Hao; Pang, Jing; Qiu, Zhaobin

doi:10.1177/0954406218762954

Cited by 11 publications

(3 citation statements)

References 5 publications

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“…The force balance is the primary indicator of the seedling soil-lump damage, which means the force balance may specify the quantity and the size of the damage; likewise, the final damage ratio shows how far the balance between the lump-soil pick-up force and the faced pick-up resistance is [30]. The force balance ratio is regarded as the main dependent parameter during the transplanting system, although it followed the effect of the speed of the end-effector [31,32]. SMC is considered as another factor affecting the force balance of the seedling soil-lump.…”

Section: Discussionmentioning

confidence: 99%

Effect of Soil Moisture Content and End-Effector Speed on Pick-up Force and Lump Damage for Seedling Transplanting

Mohamed

Liu

2019

AgriEngineering

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Efficient transplanting has been identified as one of the essential steps towards achieving an increased yield in the farm. However, many factors are affecting these processes such as soil moisture content and the speed of pickup. This study was carried out to investigate the effect of different soil moisture content and pickup speeds on pickup force, balance, resistance, and lump damage during transplanting of seedlings. The results showed that penetration resistance was inversely proportional to the speed and soil moisture content. The highest penetration resistance (38 N) values were recorded under the lowest speed (0.5 mm/s) at the low moisture content; whereas, the lowest penetration resistance was obtained at highest speed (10 mm/s) under high moisture content. The highest pick-up force resistance values were recorded under the lowest speed (0.5 mm/s) at low moisture content than the lowest pick-up force resistance of 1.4 N at (10 mm/s) under the high moisture content. On the other hand, an increase of pick-up force led to a decrease in the pick-up force resistance. The pick-up damage and the pick-up speed are directly proportional—nevertheless, the former increased with a decreasing soil moisture content. The highest pick-up damage values (82%) were observed under the top-most speed (10 mm/s) at high moisture content. It can be concluded that for successful auto-transplanting of seedling the soil condition, the force applied and speed should be taken into consideration. This work will implement an effective seedling-picking performance and basis for the optimal design of end-effectors.

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Section: Discussionmentioning

confidence: 99%

Effect of Soil Moisture Content and End-Effector Speed on Pick-up Force and Lump Damage for Seedling Transplanting

Mohamed

Liu

2019

AgriEngineering

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“…The control system includes position sensors, stepper motor, variable-frequency motor and program controller. The result demonstrated that the machine was feasible to transplant the potted tomato seedlings efficiently [6].…”

Section: Introductionmentioning

confidence: 90%

Comparative research on realization of agrotehnical indices by seedling planting machines with bucket dispensers

Mitrache

Saracin

Ciupercă

2020

19th International Scientific Conference Engineering for Rural Development Proceedings

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In the paper there are some comparative researches on planting machines with nutrient bale, equipped with rotary bucket dispensers, which are the most used models due to the fact that they are the most efficient and the most spread at the present time for planting seedlings. We will limit ourselves to the analysis of the representative types, from a constructive and functional point of view, namely, the machines equipped with articulated bucket dispensers, their vertical rotation, respectively those with fixed bucket dispensers, with rotation in horizontal plane. Some achievements are being made worldwide in the field of planting machinery, especially those equipped with rotary disc and bucket dispensers .In addition to their constructive and functional description, there is an analysis of the advantages and disadvantages of each type achieved, seen from the perspective of complying with the seedling planting technology, on the one hand, and functionality, maintenance and economic aspects, on the other hand. Recommendations of agro-technical and technological requirements are presented for planting seedlings, such as: rows planted to be straight, deviations from the permitted row axis are max. 5 % within ± 20 mm; the planting depth can be achieved within 30-150 mm; the position of the planting seedlings is as close as possible to the vertical; the percentage of seedlings improperly planted (inclined more than 300 to the vertical, ground covered, left on the ground or damaged) is less than 5 %. The tested equipments are presented, their characteristics, advantages and disadvantages, the conditions under which the experiments were carried out will also be presented, as well as the equipment used to perform the experiments. The results obtained constitute the basis for comparative analysis and summaries, the constructive types analysed are identified, specifying for each of how they meet, or not, the agri-technical requirements imposed on the work of planting seedlings, depending on the advantages and disadvantages presented for each type are analysed. Based on the analysis carried out, conclusions on the results are obtained and recommendations on optimal solutions are presented.

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“…Since the end-effector is the core component of mechanical transplanting devices used for pot seedlings, the design of an end-effector tends to have an immediate impact on the outcome of seedlings [4,5]. In general, an end-effector can be divided into a plugged-out type [6][7][8], a clamping type [9][10][11], and a top clamp combined type [12][13][14] according to how the seedlings are picked up. At present, the sizes commonly used for vegetable hole tray transplantation include 72 holes, 128 holes, and 200 holes.…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment of Automatic Adjustable Transplanting End-Effector Based on Double-Cam

Yun

Jin

et al. 2023

Agriculture

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In view of the plugged-out end-effector that can adapt only to a specific size of the tray, the needle spacing and angle of the seedling needle are fixed. In this paper, a new type of plugged-out transplanting end-effector is proposed. The end-effector adopts a double-cam structure to automatically adjust the spacing and angle of the seedling needle, which solves the problem of picking seedlings for different sizes of trays. Firstly, the working principle of 72-hole, 128-hole, and 200-hole trays and a plugged-out end-effector was analyzed. The overall structure of the end-effector was designed. Subsequently, the EDEM software was used to construct the pot seedling model and conduct single-factor simulation experiments to identify the range of factors for the subsequent regression orthogonal experiment. Finally, a tray transplanting test platform was built. With the grasping acceleration, penetration angle, insertion depth, and insertion margin ratio as the test factors and the pot seedling breakage rate as the test evaluation indicators. A four-factor three-level orthogonal regression experiment was conducted to establish a regression model of the seedling breakage rate, and its parameters were optimized. The optimal combination is detailed as follows: a 72-hole tray grasping acceleration of 0.28 m/s2, a penetration angle of 13°, an insertion depth of 40 mm, and an insertion margin ratio of 15%; a 128-hole tray grasping acceleration of 0.28 m/s2, a penetration angle of 12°, an insertion depth of 36 mm, and an insertion margin ratio of 15%; a 200-hole tray grasping acceleration of 0.28 m/s2, a penetration angle of 11°, an insertion depth of 32 mm, and an insertion margin ratio of 10%. Under the optimal combination, the breakage rate of 72 holes reached 2.92%. The breakage rate of 128 holes was stable at 1.76%, while that of 200 holes was stable at 0.68%, which is conducive to the study of a general end-effector. The device developed in this study provides an effective solution to taking and throwing different sizes of cavitation trays, thus providing a practical reference for the study of a generic end-effector.

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Design and experiment of automatic transplanting device for potted tomato seedlings

Cited by 11 publications

References 5 publications

Effect of Soil Moisture Content and End-Effector Speed on Pick-up Force and Lump Damage for Seedling Transplanting

Effect of Soil Moisture Content and End-Effector Speed on Pick-up Force and Lump Damage for Seedling Transplanting

Comparative research on realization of agrotehnical indices by seedling planting machines with bucket dispensers

Design and Experiment of Automatic Adjustable Transplanting End-Effector Based on Double-Cam

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