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Improvement and optimization of preparation process of seedling-growing bowl tray made of paddy straw

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International Journal of Agricultural and Biological Engineering 2014年第4期7卷 13-22页

作者： li lianhao Wang Chun Zhang Xinyue li Guangyong College of Water and Civil Engineering China Agricultural UniversityBeijing 100083China College of Engineering Heilongjiang Bayi Agricultural UniversityDaqing 163319China

A new type of rice seedling carrier named seedling-growing bowl tray made of paddy straw(SGBTMPS)was developed in *** preparation process for SGBTMPS is complex and difficult to ***,a new SGBTMPS preparation method has been developed by using straw powder as the main raw *** this method,modified starch-based adhesive was replaced by the binder of thermosetting adhesive,and preparation constraints such as forming pressure,forming temperature,and dwell time were *** effects of factors such as glue(modified starch-based adhesive),forming pressure,forming temperature and dwell time on SGBTMPS preparation were evaluated by single factor *** experiment and comprehensive weight analyses were adopted to optimize the parameters for SGBTMPS *** results showed that optimized parameters were 125% glue and 1.2 kg mixed materials with the forming pressure,temperature,and dwell time of 30 MPa,140℃ and 330 seconds,*** with traditional preparation process,the proportioning link,preparation link,and preparation time in the new preparation process were reduced by 66.7%,33.3%,and 17%,respectively;the pot-hole percentage and the expansion ratio were increased by 0.09% and 0.05%,*** study indicated that the new preparation process for SGBTMPS was simpler and easier to operate and would provide a useful reference for further research and industrialization on SGBTMPS.

关键词： seedling-growing bowl tray preparation process paddy straw rice production modified starch-based adhesive straw powder

Design and optimization of seedling-feeding device for automatic maize transplanter with maize straw seedling-sprouting tray

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International Journal of Agricultural and Biological Engineering 2015年第6期8卷 1-12页

作者： Zhang Wei Niu Zhaojun li lianhao Hou Yongrui College of Engineering Heilongjiang Bayi Agricultural UniversityDaqin g163319China Tropical Agricultural Machinery Research Institute Chinese Academy of Tropical Agricultural SciencesZhanjiang 524091China

This research aimed to solve current problems in the process of maize transplanting in China such as large labor intensity,low working efficiency and poor *** the basis of the structure of a seedling-sprouting tray made of maize straw and the agronomic requirements of maize production,this study developed a new feeding device for such a sprouting tray,determined the dimensions of the key components in a virtual environment via Solid Edge software and obtained optimal working parameters in combination with *** tests on field validation and maize production were conducted as *** test results showed the importance of the working parameters on an upright degree in descending order(as well as the best working parameters)to be the vertical angle of seedling planting(13.14°),the forward speed of locomotion(0.57 m/s),and the horizontal angle of the seedling box(22.5°).The standard deviation of the field validation was 6.04%,which was within the allowable range to meet the requirements of maize *** with maize transplanting machines(and manual transplanting operations)on the current market,the labor inputs,as well as the rates of spacing and upright degree qualification,omitted planting and the yield using the new feeding device for automatic transplanter with maize straw seedling-sprouting trays increased 0(6.9%),0(3.1%),0(4.5%)and 0(−1.0%),respectively;whereas,the manufacturing cost was reduced by 35.5%.The results can provide a technical basis and reference for subsequent development of automatic transplanters with maize straw seedling-sprouting trays.

关键词： maize seedling-sprouting tray automatic maize transplanter seedling-feeding device optimization

Optimization of working parameters for puddling and flatting machine in paddy field

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International Journal of Agricultural and Biological Engineering 2016年第3期9卷 88-96页

作者： Xu Chunlin Zhang Chengliang li lianhao li Mingjin College of Engineering Northeast Agricultural UniversityHarbin 150030China College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China Harbin Agricultural Mechanization Research Institute Harbin 150070China

In order to improve the soil preparation quality,a wide puddling and flatting machine for paddy field was designed with the functionality of tillage,soil crushing,puddling,burying stubble and flatting in one-time operation,which can be equipped on tractors with high *** study focused on the design and analysis of key components of the machine including puddling equipment,flat shovel and balance *** results with field trials and response surface analysis showed that the machine can operate optimally when the working speed,puddling depth and angle of flat shovel were 1.05 km/h,16 cm and 31.30°,*** surface flatness standard deviation was 3.7 cm,and slurry degree was 1.03 g/*** validation test results were consistent with the optimal parameters,which was able to meet agronomic requirements of mechanical planting in China.

关键词： paddy field puddling and flatting machine rice production design field test optimization

Development and evaluation of power consumption model for no-till planter based on working parameters

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International Journal of Agricultural and Biological Engineering 2017年第1期10卷 80-87页

作者： Gao Dongming li lianhao Qiao Xiaodong Khokan Kumer Sarker College of Material and Mechanical Engineering Beijing Technology and Business UniversityBeijing 100048China College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China Beijing Research Center of Intelligent Equipment for Agriculture Beijing 100097China Bangladesh Agricultural Research Institute(BARI) Gazipur 1701Bangladesh

In order to fully understand the relationships of power consumption of no-till planter among tractor,soil properties and working parameters which affect the field operation,the power consumption model for no-till planter applied to overcome the coupling difficulties was developed in the *** on operation depth of no-till planter and soil properties as constraints in accordance with a certain distribution,the relationship data among traction force,forward speed and power output shaft by field test were collected and *** results showed that the relationship between traction power and power-take-off(PTO)power was negatively *** the same power consumption condition,the relationship between traction force and the PTO torque was linearly correlated,and the slope was basically *** power consumptions corresponded to different *** the forward speed was 6-7 km/h and PTO shaft rotational speed was 370-450 r/min,lower power consumption with higher working efficiency can be *** was a direct correlation between total power consumption and the square of rotational speed multiplied by forward *** maximum correlation coefficient was found around *** findings set up a foundation for designing control system of no-till planter.

关键词： no-till planter power consumption models working parameters evaluation

Analysis of the decrease of center pivot sprinkling system uniformity and its impact on maize yield

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International Journal of Agricultural and Biological Engineering 2016年第5期9卷 108-119页

作者： li lianhao Zhang Xinyue Qiao Xiaodong liu Guiming College of Mechanical and Electronic Engineering Henan Agricultural UniversityZhengzhou 450002China Collaborative Innovation Center of Biomass Energy Zhengzhou 450002China College of Engineering Heilongjiang Bayi Agricultural UniversityDaqing 163319China Chinese Academy of Agricultural Mechanization Sciences Beijing 100083China

Early studies showed that the irregular operations of the center pivot sprinkling system would decrease its uniformity while the reason was lack of *** Herman-Hein uniformity coefficient(CUH)and Distribution uniformity coefficient(DU)as evaluation indicators,the reason that irregular operation management and configurations can decrease the uniformity of center pivot sprinkling irrigation was discussed and the impact on maize yield was *** reasons for such decrease in uniformity include:(1)With the increase of moving speed,the effect of sprinkling overlaying became worse,which resulted in the lower uniformity of sprinkling irrigation;(2)With the increase of head pressure,the inlet pressure could be adjusted to the same pressure by pressure regulator,which kept the uniformity of sprinkling irrigation constant;(3)When end gun worked abnormally,total head pressure decreased,which led to the decrease of sprinkling irrigation’s uniformity;(4)When pressure regulator worked abnormally,the water flow was subject to great pressure loss,which could decrease the uniformity of sprinkling irrigation;(5)When pressure regulator was uninstalled,significant abnormality of sprinkling irrigation depth occurred,resulting in the decreasing of sprinkling irrigation’s uniformity;(6)Different types of nozzles could produce different uniformity of sprinkling irrigation,which was due to different structures of micro-nozzles;(7)Due to lower uniformity,at the seedling stage of maize,both height and seedling emergence rate *** yield decreased by 18.35%.This study is important to the proper use and the improvement of configuration selection and field management of center pivot sprinkling system.

关键词： center-pivot sprinkling system uniformity maize yield

Performance analysis of a spring-tooth drum pickup of straw baler via coupling simulation

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International Journal of Agricultural and Biological Engineering 2021年第4期14卷 159-165页

作者： Qingqing Wang Yongcheng Jiang lianhao li Junwei Qin liqing Chen School of Engineering Anhui Agricultural UniversityHefei 230036China Laboratory of Engineering of Intelligent Agricultural Machinery Equipment Anhui ProvinceHefei 230036China School of Mechanical Engineering Jiamusi UniversityJiamusi 154007HeilongjiangChina School of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China

In order to solve the problem of poor working performance due to incidental picking-up loss of a spring-tooth drum pickup,the coupling analysis approach of Automated Dynamic Analysis of Mechanical Systems(ADAMS)and Discrete Element Method(DEM)was proposed to reveal its motion *** coupled ADAMS-DEM method was used to construct the pickup simulation model with rice straw as the *** validation tests were carried out in the field with different operating forward speeds and straw *** results showed that when the baler worked with a rake,the straw loss rate tended to rise with the increase of the operating speed and the straw *** results indicated periodic peaks and valleys of the forces between the rollers and the track chute,which could increase the wear of the track *** addition,the movement and variation of the straw and the distribution of different straw lengths after picking up were *** research results can provide a reference for the design and optimization of a pickup in the later period.

关键词： ADAMS-DEM coupling loss rate pickup straw coverage straw baler

Optimized design and experiment of a fully automated potted cotton seedling transplanting mechanism

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International Journal of Agricultural and Biological Engineering 2020年第4期13卷 111-117页

作者： Xianglei Xue lianhao li Chunlin Xu Enquan li Yujie Wang College of Engineering Northeast Agricultural UniversityHarbin 150030China College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China

In order to improve the accuracy and stability of transplanting machine seedling picking,a seedling pick-up mechanism was designed,which was controlled by a controller and driven by brushless DC servo *** the same time,the parameters of the seedling manipulator were optimized:the mathematical model for the seedling pick-up mechanism was *** to the predetermined trajectory requirements,the objective function and constraint conditions were proposed,and then the optimal size was obtained by a multi-objective genetic *** last,Automatic Dynamic Analysis of Mechanical Systems(ADAMS)software was used to simulate and analyze the kinematics and trajectory of the seedling pick-up mechanism,and the mechanism was tested to verify the effectiveness of the mechanism *** experiments showed that the success rate of seedling picking was 94.32%,the rate of acceptably planted seedlings was 96.67%,and the rate of excellently planted seedlings was 63.48%.

关键词： cotton seedling transplanting machine kinematic model optimized design test full automation

Quantitative response of oil sunflower yield to evapotranspiration and soil salinity with saline water irrigation

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International Journal of Agricultural and Biological Engineering 2016年第2期9卷 63-73页

作者： He Xin Yang Peiling Ren Shumei li Yunkai Jiang Guangyu li lianhao College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China

Appropriate application of water-salt-crop function model can optimize agricultural water management in regions with declining water supply,such as the Hetao *** use of saline water is also based on the effects of irrigation water demand and water quality on crop growth ***,oil sunflower growth testing under both water and salt stress was completed from 2013 to *** salinity levels at 1.7 ds/m,4 ds/m,6 ds/m and 8 ds/m were used in the *** water deficit levels were reported,60%and 80%of the irrigation quota,which were considered moderate and mild deficit levels,*** treatments were applied in planting the oil sunflower in critical growing periods,namely,floral initiation,anthesis and ***,Cobb-Douglas,quadratic and transcendental function models were used to simulate the relative yield,evapotranspiration(ET)and electrical conductivity(EC).The predictive ability and sensitivity of each model were then *** with salt stress,water stress exerted a more significant effect on the oil sunflower yield;the water parameters(a1 and a3)were most sensitive in the water-salt-crop function *** sunflower was most sensitive to water and salt stress during *** transcendental function generally showed a relatively high sensitivity coefficient and a relatively small statistical ***,the transcendental function is the most appropriate model for simulating and predicting the yield of oil sunflower irrigated with saline *** the water-salt-crop function model in planting of oil sunflower can help in the development and utilization of saline water in the Hetao district.

关键词： irrigation water-salt production functions saline water water stress salt stress oil sunflower evapotranspiration

CFD modeling and experiment of heat transfer in a tubular photo-bioreactor for photo-fermentation bio-hydrogen production

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International Journal of Agricultural and Biological Engineering 2017年第1期10卷 209-217页

作者： Zhang Zhiping Zhang Quanguo Yue Jianzhi li lianhao Zhang Tian liu Zhengbai Key Laboratory of New Materials and Facilities for Rural Renewable Energy Ministry of AgricultureCollege of Mechanical&Electrical engineeringHenan Agricultural UniversityZhengzhou 450002China Collaborative Innovation Center of Biomass Energy Zhengzhou 450002China

Temperature is one of the most important parameters that need to be controlled in photo-fermentation bio-hydrogen production(PFHP)*** the high temperature and big temperature fluctuation have adverse impacts on bio-hydrogen yield,the system numerical simulation based on the operating conditions and environmental factors is *** research focused on the investigation of heat transfer properties of the PFHP *** hydrolysate from agricultural residues was taken as substrate,and up-flow tubular photo-bioreactor was adopted for *** inside the photo-bioreactor were *** experimental design and computational modeling for the determination of the heat transfer behavior in tubular photo-bioreactor was *** balance analysis was conducted to determine the energy efficiency,and optimize the operation parameters in order to obtain higher energy *** commercial software FLUENT was also adopted in order to predict the transient temperature distribution in the *** results showed that mathematical and computational modeling method has a clear potential for improving the performance of photo-bioreactor in the process of ***-flow tubular bioreactor has tiny temperature fluctuant,and is suitable for PFHP.

关键词： photo-fermentation bio-hydrogen production(PFHP) up-flow tubular photo-bioreactor heat transfer temperature distribution numerical simulation