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Jin X.,China Agricultural University | Li S.,Chinese Academy of Agricultural Sciences | Yang X.,The Modern Agricultural Equipment Co. | Sun X.,The Modern Agricultural Equipment Co. | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

During the vegetable transplanting for the existing vegetable semi-automatic transplanter, the plug seedlings picking and feeding are nearly dependent on manual work, so the work efficiency is very low. Aiming at this problem, a vegetable plug seedling automatic pick-up mechanism was designed. The motion and dynamic mathematical model were established. Moreover, the influences over the mechanism motion and dynamic characteristic by some important parameters were analyzed by using the parametric models. The design of optimization objective for automatic picking vegetable plug seedlings was proposed. And then, the range of mechanism parameter which met the requirements of the motion trajectory for plug seedling picking was obtained. In addition, the dynamic analysis for the pick-up mechanism was carried out based on the range. Meanwhile, taking the minimal force wave of mechanism bearing as optimization objective, the optimal parameter combination of pick-up mechanism was obtained. With these parameters, the plug seedling pick-up mechanism processed better the motion trajectory and better dynamic performance which met the demands of seedling picking. Source


Wu J.,The Modern Agricultural Equipment Co. | Yan H.,The Modern Agricultural Equipment Co. | Jin X.,Chinese Academy of Agricultural Sciences | Jin X.,China Agricultural University | And 4 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

A kind of transplanting seedling disc conveying device and positioning control system were developed for automatic disk conveying and accurate position of pot seedling transplanter. The moving speed and distance of seedling disc could be adjusted according to the disc size, which was driven by gas-liquid damping cylinder. The PLC was used as control core and the touch screen was used as human-machine interface. Experimental results showed that the influence caused by the cylinder response lag and machining error could be eliminated by setting the compensation value. The positioning control error was less than 1 mm, which met requirements of high-speed automatic transplanting machine. Source


Jin X.,Henan University of Science and Technology | Du X.,Henan University of Science and Technology | Gan B.,The Modern Agricultural Equipment Co. | Ji J.,Henan University of Science and Technology | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2016

In order to solve the problems of halfway separating and high losing rate of the cyclone separation system, material movement analysis was done by using of high-speed photography. The wheat and mixture of stalk were chosen as the experiment objects, statistical experiment was carried out when diameter of air pores, rotating speed of the fan and rotating speed of the winnower were chosen as the experiment factors and cleaning rate and losing rate were chosen as the experiment indicators. Single factor experiment result showed that the arrangement of the air pores had effect on the cleaning ability. When the arrangement of the pores was spiral, the system performed better. The cleaning rate was increased first and went down later with the increasing of the rotating speed of the fan, winnower and the diameter of the air pores. The losing rate was increased with the increasing of the rotating speed of the fan, winnower and the diameter of the air pores, the value of losing rate was no more than 2%. Multi-factor experiment result showed that when the rotating speed of the fan was 1 900 r/min, the rotating speed of the winnower was 1 100 r/min and the diameter of the air pores was 8 mm, the cleaning system worked better, the average value of losing rate was less than 1.5%, which was reduced by 25% compared with the former. © 2016, Editorial Office of Nanotechnology and Precision Engineering. All right reserved. Source


Jin X.,China Agricultural University | Li S.,Chinese Academy of Agricultural Sciences | Yang X.,The Modern Agricultural Equipment Co. | Yan H.,The Modern Agricultural Equipment Co. | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2012

During the up-film transplanting for dibble-type transplanters, the mulch film could be easily dilaceraded and scraped. Aiming at this problem, a pot seedling transplanter in duck-beak style was designed while the working principle of it was expounded. The motion mathematical model of its planting mechanism was established. And then, parametric modeling for the planting mechanism based on the model was completed in ADAMS. The influences over the mechanism motion characteristic by some important parameters were analyzed by using the parametric model. In addition, the cave value which formed by the distance between two intersections points of the duck-beak trajectory and ridge line as possible as small was taken as the optimization objective, while the higher upright degree of seedling was ensured. Meanwhile, the optimal parameter combination of planting mechanism was obtained. With it, the cave value was 1.8 mm and the verticality of duck-beak trajectory after transplanting seedlings was higher, and then the demands of up-film transplanting could be met, namely higher upright degree of seedling and without dilacerating films. Source

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