Modern Agricultural Equipment Co.

Beijing, China

Modern Agricultural Equipment Co.

Beijing, China
SEARCH FILTERS
Time filter
Source Type

Kang J.,Chinese Academy of Agricultural Sciences | Kang J.,Xinjiang Academy of Agricultural and Reclamation Science | Li S.,Chinese Academy of Agricultural Sciences | Yang X.,Chinese Academy of Agricultural Sciences | And 4 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2017

Aiming at the problem of that the power consumption of disc type ditcher is difficult to test, a virtual test platform evaluation disc type ditcher set power consumption method was proposed. Firstly, the dynamics model of disc type ditcher was established. In order to shorten the operation time, the secondary characteristics such as chamfer, fillet and connection were omitted. The boundary conditions and loads were set up. The virtual simulation of power consumption in disc type ditcher was carried out with trenching depths of 400 mm and 500 mm, forward speeds of 0.8 km/h and 1.5 km/h, rotation speeds of 180 r/min and 220 r/min, respectively. The power curve of ditch process showed that at the beginning of soil cutting, power consumption was increased quickly, the reason for which was a great deal of power consumption was needed during the process of soil deformation and broken. After that the power consumption was tended to be stable, for the reason of which was the binding force was tended to be less after the soil particle was destroyed. Then the field power test system was built and the relative errors were 6.88% and 7.73%, respectively, compared with simulation results. The accuracy and feasibility of the proposed method were verified. Finally, totally 18 conditions (three trenching depths, two forward speeds, and three rotating speeds) were selected to carry out the simulation. The results showed that with a certain trenching depth, the disc type ditcher had an increasing linear relationship with forward speed and rotation speed. With a certain ditching depth and forward speed, the lowest power consumption was appeared at rotation speed of 200 r/min. Moreover, with a large trenching depth and forward speed, the effect of rotation speed on power consumption was obvious. When the rotary speed was 200 r/min, both low and high speeds, disc type ditcher had the lowest power consumption value. According to comparison at rotary speed of 219 r/min in different ditching depths and forward speeds, the power consumption at rotary speed of 200 r/min was decreased by 8.5 kW, 9.6 kW and 4.6 kW, the results provided a theoretical basis for power consumption measurement of rotary ditcher. © 2017, Chinese Society of Agricultural Machinery. All right reserved.


Zhang Z.,China Agricultural University | Li S.,Chinese Academy of Agricultural Sciences | Han Z.,Modern Agricultural Equipment Co. | Liu G.,Modern Agricultural Equipment Co. | And 2 more authors.
International Agricultural Engineering Journal | Year: 2016

For this study, a test bench was designed and manufactured to combine feeding, threshing, separation, delivery and control devices. In the designed test bench, an orthogonal experiment was conducted with concave clearance, feeding rate and rotating speed as three independent factors, as well as separation efficacy, entrainment rate, percentage of unthreshed material and breakage rate as dependent indices, while using flint corn (Kuan Cheng No.1) with 15.71% moisture content as the test material. The results indicate that the rotating speed has the greatest influence on separation and mechanical performance, followed by concave clearance and feeding rate. At a concave clearance of 42 mm, a feeding rate of 6.23 kg/s and rotating speed of 240 r/min, the test bench shows optimal performance. Using a neural network tool with feed-forward backprop (BP) algorithm on Matlab software, the separation rate along the axial length of threshing rotor was regressed. The correlation coefficient between simulation and average test values was 0.9904 and confirms that the regression model accurately predicts separation rate under various operation parameters. © 2016, Asian Association for Agricultural Engineering. All rights reserved.


Zhang T.,Modern Agricultural Equipment Co. | Dong X.,Chinese Academy of Agricultural Sciences | Yin S.,Chinese Academy of Agricultural Sciences | Yang X.,Chinese Academy of Agricultural Sciences | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2016

Lightweight high clearance boom sprayer with air-assisted system was designed to develop efficient pesticide application technologies for soybean at middle and later growing stages. The sprayer wheel tread can be adjusted from 1600 mm to 1750 mm, ground clearance was 800 mm, wheel base was 2000 mm, spray span was 8000 mm. Various soybean field experiments were conducted to measure the performance of air-assisted spraying system on lightweight high clearance boom sprayer. The experiment results showed that when the operating speed was 4 km/h, droplet coverage rate of the positive soybean leaves surface was increased by 19.0 percentage points in upper canopy and 17.0 percentage points in middle canopy, while that in lower canopy was increased by less than 5.0 percentage points through improving the spray pressure. Droplet coverage rate of back soybean leaves surface was increased by 5.5 percentage points in upper canopy and 2.3 percentage points in middle canopy, and that in lower canopy was increased by less than 1.0 percentage points. Droplet coverage rate by using ST110-05 nozzle was improved by 21.0 percentage points, 26.0 percentage points and 10.0 percentage points compared with that by using ST110-03 nozzle on the positive soybean leaves surface in upper, middle and lower canopies, respectively. Droplet coverage rate by using ST110-05 nozzle was increased by 5.0 percentage points and 1.0 percentage points in comparison with that by using ST110-03 nozzle on the back soybean leaves surface in upper and middle canopies, respectively, and no significant influence on lower canopy. When the air speed of curtain was 11.5 m/s, the air-assisted system could make the droplet coverage rate of positive soybean leaves surface increase by 26.8 percentage points and 22.0 percentage points in middle and lower canopies, respectively. The droplet coverage rate of back soybean leaves surface was increased by 23.1 percentage points, 18.1 percentage points and 8.4 percentage points in upper, middle and lower canopies, respectively. The assisted air flow had strong penetrability which was shown in the droplet coverage rate on positive and back leaves surfaces, and improved the distribution uniformity in soybean canopies. However, the droplet loss rate on the ground was increased. © 2016, Chinese Society of Agricultural Machinery. All right reserved.


Miao Z.,Shanghai University | Chu J.,Shanghai University | Liu C.,Shanghai JiaoTong University | Han Z.,Modern Agricultural Equipment Co. | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2012

A digital intelligent monitoring system based on CAN bus was constructed. Based on CAN 2.0B frame structure, the principle and method of the CAN bus application-layer protocol constitution were addressed by analyzing the message identifier of extended superframe. The CAN bus application-layer protocol of monitoring system suited for cotton-picking machine was proposed. This protocol was applied on the prototype of cotton-picking machine. The experiment results showed that the proposed protocol not only met the need of intelligent monitoring system, but also be characterized by good portability and scalability. The research results can also be applied in other agricultural and engineer machinery.


Zhang Z.,China Agricultural University | Han Z.,Chinese Academy of Agricultural Sciences | Li S.,China National Machinery Industry Corporation | Hao X.,Modern Agricultural Equipment Co. | Wang C.,Modern Agricultural Equipment Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2016

In order to study the influence of relative setting position between reciprocating cutter and nip point of gripping chains and the growth direction of corn ears on corn harvesting performance, a new gripping device of corn combine harvesting of corn stalk and ears in the cramping-cutting-transporting type was designed. A rice special agricultural chain was used to replace the gathering chain and gripping chain of gripping device in original corn combine harvester. The theory of dividing, dialing and gripping corn stalk was analyzed. Recurdyn software was employed to build a rigid-flexible system with corn stalk as flexible part and cutting-grapping device as rigid element. The effect of five horizontal distances between reciprocating cutter and nip point of gripping chains and three growth directions of corn ear on motion of ear growth point were simulated. The five distances were -70 mm, -35 mm, 0 mm, 35 mm and 70 mm, respectively, and the three directions were separately machine forwarding direction, opposite and vertical to forward directions. The simulation results showed that both the growth direction of corn ears and relative distance had effect on motion of corn plants. When the horizontal distance was -70 mm and -35 mm, corn plants were cut with no cramping, they would incline to the direction of corn ear growing; when the distance was 0 mm, 35 mm and 70 mm, corn plants were cut with cramping and they would move with gripping chains. A corn combine harvester for stalk and ears was designed and manufactured to test the performance of cutting and gripping device with horizontal distance of -70 mm and -35 mm in the field. Field tests were made at machine working speed of 1.2 m/s and gripping chain speed of 1.39 m/s. The results indicated that when the horizontal position of cutter relative to the nip point of grip chains was -70 mm, the total plant loss was 36.2%, while it was 3.3% with the position of 35 mm. This verified that cutting with gripping could greatly reduce the grain harvesting loss, and it proved that the simulation analysis was reasonable and reliable. This study illustrated corn combine harvester for stalk and ears in the cramping-cutting-transporting type needed to cut with gripping and provided a basis for design of corn combine in this type. © 2016, Chinese Society of Agricultural Machinery. All right reserved.


Liu L.,Modern Agricultural Equipment Co. | Liu Z.,Modern Agricultural Equipment Co. | Yang X.,Chinese Academy of Agricultural Sciences | Li C.,Modern Agricultural Equipment Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

The 2BMG-24Q pneumatic no-till wheat planter was designed. Seeds were transported into seeder pipes with high-speed air current to perform precision metering. The wavy disc coulters were used to cut stubble for sowing, and the double disc coulters were used to open furrow for fertilizing. The test results showed that the quanlification percent of seed depth and fertilizer depth were 88.3% and 85.2%, respectively.


Wang J.,Chinese Academy of Agricultural Sciences | Dong X.,Chinese Academy of Agricultural Sciences | Yan H.,Chinese Academy of Agricultural Sciences | Zhang T.,Modern Agricultural Equipment Co. | Zeng Y.,Modern Agricultural Equipment Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

Air-assisted spraying technique research was carried out to increase pesticide efficiency and decrease pesticide loss. The spraying performance was experimentally studied on model 3WQ-3000 trailed air-assisted boom sprayer in small bell stage of corn fields. The effects of four sizes of flat fan nozzles (ST110-02, ST110-04, ST110-05, ST110-06) with air curtain on pesticide efficacy, coverage rate and loss rate were carried out. The experiment results showed that the deposition amount was large at upper part of corn canopy and small at lower part. Air curtain enhanced penetrability, deposited property of droplets and improved the uniformity of distribution at corn canopies. Air-assisted sprayer had significant influence on small size droplets VMD that the pesticide efficacy of ST110-02 flat fan nozzle with air curtain was 83% more than that without air curtain. The optimum pesticide efficacy of ST110-06 flat fan nozzle with air curtain was 41.93%. Air curtain could increase pesticide loss rate on the ground. The best loss rate of ST110-02 flat fan nozzle without air curtain was 13.05%. Compared with the conventional sprayer, the new air-assisted sprayer had better droplet coverage rate and higher penetrability, the average pesticide efficacy was improved by 144.17%, and pesticide loss rate on the ground was reduced by 14.46%. ©, 2015, Chinese Society of Agricultural Machinery. All right reserved.


Zhao Z.,Modern Agricultural Equipment Co. | Liu Y.,Modern Agricultural Equipment Co. | Liu Z.,Modern Agricultural Equipment Co. | Gao B.,Menoble Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2014

In order to solve the problem of high reseeding, miss-seeding and instability issue in the vegetable tray precision seeder, the seedling performance was detected in the tray precision seeder based on machine vision technology. The performance detective device was setting in the tray precision seeder. Double-camera took tray images one by one after the tray was detected by photosensor, and then these images were transferred to the computer in real-time. The images were processed and analyzed by the vision algorithm software, the seeds could be seen in the tray and the results and photos were displayed on the screen together. The test showed that the reseeding detection accuracy was 98.94% and miss-seeding detection accuracy was 99.33%. ©, 2014, Chinese Society of Agricultural Machinery. All right reserved.


Chen K.,Modern Agricultural Equipment Co. | Yang X.,Modern Agricultural Equipment Co. | Yan H.,Modern Agricultural Equipment Co. | Guo Y.,Modern Agricultural Equipment Co. | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

An automatic transplanter mechanism was designed. According to the mechanism principle, the corresponding mathematical model was built. Relationship of each parameter in the proposed model was analyzed. For the different types of seedling trays, Matlab was used, which optimized the structural parameters of the model. The proposed seedling pick-up mechanism met the design demands of opening-closing in a given range and clamp for seedling substrate.


Teng S.M.,Modern Agricultural Equipment Co. | Kang Z.,Chinese Academy of Agricultural Sciences | Wang Y.Y.,Modern Agricultural Equipment Co. | Shao H.Y.,Modern Agricultural Equipment Co. | Zhang C.P.,Modern Agricultural Equipment Co.
Applied Mechanics and Materials | Year: 2014

For the quality control of developed small batch manufacturing mode, a method based on stochastic weighted theory is proposed to optimize control parameters of control charts. The small sample data is sampled again by stochastic weighted method to obtain more information. Then, the sample data’s distribution parameters are estimated. After the estimated distribution parameter are tested, control parameters of control charts could be optimized dynamically. The method improves deficiencies of traditional control charts under low-volume production and realizes the quality control of small batch manufacturing. Experiments show that the optimized control parameters approach theory true values and are better than the traditional control charts’ control parameters. Therefore, the proposed method is fit for the quality control of small batch manufacturing. © (2014) Trans Tech Publications, Switzerland.

Loading Modern Agricultural Equipment Co. collaborators
Loading Modern Agricultural Equipment Co. collaborators