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| 1 | 中国农业航空植保产业技术创新发展战略显示文摘农业航空是现代农业的重要组成部分和反映农业现代化水平的重要标志之一。该文在分析中国农业现代化建设中对航空植保技术的需求及国内外航空植保发展现状的基础上,对中国航空植保产业体系进行了深入剖析。指出了制约中国农业航空植保产业发展的主要问题,包括现有农业航空政策法规体系不完善、配套核心科学技术研究不足、专业队伍人才匮乏、社会化服务体系不健全、与农业航空相适应的农田作业环境基础建设被忽略、制度上缺少支持农业航空发展的公益性安排等。并从提高航空植保作业适应性的多机型多作业方式、加大资金投入增强配套核心科学技术的攻关、以及出台有针对性的政策加强管理和规范等方面提出了大力推进中国农业航空植保产业快速健康发展的战略及对策建议。最后对未来3个五年计划内中国对航空植保技术的需求情况进行了预测。分析预测表明,中国农业航空产业是一个尚未真正启动的大产业,未来中国农业航空市场的需求将会有爆发性增长,拉动新增机型投入将达到465亿元以上。随着相关制度及配套核心技术的不断完善,中国农业航空产业必将得到健康、有序和高速发展,有利于实现农业病虫害统防统治,实现精准作业,极大地提速中国现代农业的进程。 | 周志艳 臧英 罗锡文 Lan Yubin 薛新宇 | 2013 | 农业工程学报2013，29，24： | 187 |
| 2 | Drift and deposition of ultra-low altitude and low volume application in paddy field显示文摘Field trials were performed to evaluate various techniques for measuring spray deposition and aerial drift during spray application to paddy field.The application of a spraying agent containing the fluorescent dye Rhodamine-B was applied by an unmanned aerial vehicle(UAV)which flew at a height of 5 m,a speed of 3 m/s,and the wind speed of 3 m/s.The results showed that because the downdraft produced by a helicopter rotor increased the penetrability of crops,there is a higher deposition on the upper layer and the under layer than the traditional spraying.The average deposition on the upper layer accounts for 28% of the total spraying,the deposition on the under layer accounts for 26% of the total spraying.The deposition on the under layer takes up 92.8% of the deposition on the upper layer.Droplets drift data showed that the drift of non-target area took up 12.9% of the total liquid spray.The 90% drifting droplets were located within a range of 8 m of the target area;the drift quantity was almost zero at a distance of 50 m away from the treated area. | Xue Xinyu Tu Kang Qin Weicai Yubin Lan Huihui Zhang | 2014 | International Journal of Agricultural and Biological Engineering2014，7，4： | 40 |
| 3 | Current status and future trends of precision agricultural aviation technologies显示文摘Modern technologies and information tools can be used to maximize agricultural aviation productivity allowing for precision application of agrochemical products.This paper reviews and summarizes the state-of-the-art in precision agricultural aviation technology highlighting remote sensing,aerial spraying and ground verification technologies.Further,the authors forecast the future of precision agricultural aviation technology with key development directions in precision agricultural aviation technologies,such as real-time image processing,variable-rate spraying,multi-sensor data fusion and RTK differential positioning,and other supporting technologies for UAV-based aerial spraying.This review is expected to provide references for peers by summarizing the history and achievements,and encourage further development of precision agricultural aviation technologies. | Yubin Lan Chen Shengde Bradley K Fritz | 2017 | International Journal of Agricultural and Biological Engineering2017，10，3： | 35 |
| 4 | The Genome Sequence Archive Family: Toward Explosive Data Growth and Diverse Data Types显示文摘The Genome Sequence Archive(GSA)is a data repository for archiving raw sequence data,which provides data storage and sharing services for worldwide scientific communities.Considering explosive data growth with diverse data types,here we present the GSA family by expanding into a set of resources for raw data archive with different purposes,namely,GSA(http://gffzz77e3413bc06540edsubwvbf5fnn0c6ucq.ffgz.tsg.suse.edu.cn/gsa/),GSA for Human(GSA-Human,http://gffzz77e3413bc06540edsubwvbf5fnn0c6ucq.ffgz.tsg.suse.edu.cn/gsa-human/),and Open Archive for Miscellaneous Data(OMIX,http://gffzz77e3413bc06540edsubwvbf5fnn0c6ucq.ffgz.tsg.suse.edu.cn/omix/).Compared with the 2017 version,GSA has been significantly updated in data model,online functionalities,and web interfaces.GSA-Human,as a new partner of GSA,is a data repository specialized in human genetics-related data with controlled access and security.OMIX,as a critical complement to the two resources mentioned above,is an open archive for miscellaneous data.Together,all these resources form a family of resources dedicated to archiving explosive data with diverse types,accepting data submissions from all over the world,and providing free open access to all publicly available data in support of worldwide research activities. | Tingting Chen Xu Chen Sisi Zhang Junwei Zhu Bixia Tang Anke Wang Lili Dong Zhewen Zhang Caixia Yu Yanling Sun Lianjiang Chi Huanxin Chen Shuang Zhai Yubin Sun Li Lan Xin Zhang Jingfa Xiao Yiming Bao Yanqing Wang Zhang Zhang Wenming Zhao | 2021 | Genomics, Proteomics & Bioinformatics2021，19，4： | 38 |
| 5 | Effect of wind field below unmanned helicopter on droplet deposition distribution of aerial spraying显示文摘Wind field is one of the important factors affecting the distribution characteristics of aerial spraying droplet deposition.In order to reveal the impact mechanism of droplet deposition distribution by the wind field below agricultural unmanned helicopter rotor,in this study,the wind field distribution below uniaxial single-rotor electric unmanned helicopter rotor was measured by using a wireless wind speed sensor network measurement system for unmanned helicopter.The effects of wind field in three directions(X,Y,Z)below the rotor on droplet deposition distribution were analyzed with the condition of aerial spraying droplet deposition in rice canopy,and the regression model was established via variance and regression analyses of experiment results.The results showed that,the wind field in Y direction had a significant effect on droplet deposition in effective spray area,the wind field in Z direction had an extremely significant effect on droplet deposition in effective spray area,and the corresponding significance(sig.)values were 0.011 and 0.000.Furthermore,the wind field in Z direction had a significant effect on the penetrability and uniformity of droplet deposition in effective spray area,the corresponding sig.values were 0.025 and 0.011 respectively.The wind speed in Y direction at the edge of effective spray area had a significant effect on droplet drift,the sig.value was 0.021.In addition,the correlation coefficient R of the regression model was 0.869 between droplet deposition in effective spray area and the wind speed in Y and Z directions,and 0.915 between the uniformity of droplet deposition in effective spray area and the maximum wind speed in Z direction.The result revealed the influencing mechanism of the wind field below the rotor of uniaxial single-rotor electric unmanned helicopter on the distribution of aerial spraying droplet deposition.The results can provide guidance for the actual production application of aerial spraying to reduce liquid drift and improve the utilization rate of pesticide. | Chen Shengde Yubin Lan Li Jiyu Zhou Zhiyan Liu Aimin Mao Yuedong | 2017 | International Journal of Agricultural and Biological Engineering2017，10，3： | 25 |
| 6 | Development and prospect of unmanned aerial vehicle technologies for agricultural production management显示文摘Unmanned aerial vehicles have been developed and applied to support agricultural production management.Compared with piloted aircraft,an Unmanned Aerial Vehicle(UAV)can focus on small crop fields at lower flight altitudes than regular aircraft to perform site-specific farm management with higher precision.They can also“fill in the gap”in locations where fixed winged or rotary winged aircraft are not readily available.In agriculture,UAVs have primarily been developed and used for remote sensing and application of crop production and protection materials.Application of fertilizers and chemicals is frequently needed at specific times and locations for site-specific management.Routine monitoring of crop plant health is often required at very high resolution for accurate site-specific management as well.This paper presents an overview of research involving the development of UAV technology for agricultural production management.Technologies,systems and methods are examined and studied.The limitations of current UAVs for agricultural production management are discussed,as well as future needs and suggestions for development and application of the UAV technologies in agricultural production management. | Yanbo Huang Steven J.Thomson W.Clint Hoffmann Yubin Lan Bradley K.Fritz | 2013 | International Journal of Agricultural and Biological Engineering2013，6，3： | 22 |
| 7 | Evaluating effective swath width and droplet distribution of aerial spraying systems on M-18B and Thrush 510G airplanes显示文摘Aerial spraying plays an important role in promoting agricultural production and protecting the biological environment due to its flexibility,high effectiveness,and large operational area per unit of time.In order to evaluate the performance parameters of the spraying systems on two fixed wing airplanes M-18B and Thrush 510G,the effective swath width and uniformity of droplet deposition under headwind flight were tested while the planes operated at the altitudes of 5 m and 4 m.The results showed that although wind velocities varied from 0.9 m/s to 4.6 m/s,and the directions of the atomizer switched upward and downward in eight flights,the effective swath widths were kept approximately at 27 m and 15 m for the M-18B and Thrush 510G,respectively,and the latter was more stable.In addition,through analyzing the coefficients of variation(CVs)of droplet distribution,it was found that the CVs of the M-18B were 39.57%,33.54%,47.95%,and 59.04% at wind velocities of 0.9,1.1,1.4 and 4.6 m/s,respectively,gradually enhancing with the increasing of wind speed;the CVs of Thrush 510G were 79.12%,46.19%,14.90%,and 48.69% at wind velocities of 1.3,2.3,3.0 and 3.4 m/s,respectively,which displayed the irregularity maybe due to change of instantaneous wind direction.Moreover,in terms of the CVs and features of droplet distribution uniformity for both airplanes in the spray swath,choosing smaller CV(20%-45%)as the standard of estimation,it was found that the Thrush 510G had a better uniform droplet distribution than the M-18B.The results provide a research foundation for promoting the development of aerial spraying in China. | Zhang Dongyan Chen Liping Zhang Ruirui Xu Gang Lan Yubin Wesley Clint Hoffmann Wang Xiu Xu Min | 2015 | International Journal of Agricultural and Biological Engineering2015，8，2： | 18 |
| 8 | 基于MEMS传感器的两轴姿态调整系统设计与试验显示文摘在精准农业生产过程中,传感器实时采集作物信息或环境状态,传感器与作物的相对位置,直接影响到采集数据的准确性,及后期处理的效率,甚至影响到作业的效果。而田间道路、垄间颠簸,会影响传感器与作物相对位置,造成信息失真和不准确,为了减少地面不平整干扰对传感器位置的影响,该文提出了基于MEMS传感器步进电机驱动的两轴姿态调整系统。该研究分析了系统的工作原理和控制方法,以陀螺仪、重力加速度计为姿态测量元件,步进电机为驱动部件,设计基于单片机控制的两轴姿态调整系统平台软硬件结构。系统采用单片机对陀螺仪和加速度计信息的实时采样,建立了多传感信息的融合算法和姿态判定模型,可以实时分析检测对象姿态,并输出控制步进电机,对平台姿态进行补偿调整,保持控制对象的相对惯性空间方位不变,实现了平台姿态平衡的快速控制。同时系统加入了绝对位置传感器,实现初始工作状态的自动复位。测试试验结果表明,系统运行稳定,单轴姿态调整精度在平整坡路状态下最大误差在0.5°以内,在田间颠簸路况运行下最大误差在3.0°以内,能够满足信息采集和检测过程中姿态自动调整、保持相对位置的控制要求。利用该控制系统,能够提高信息采集的准确性,在精准农业生产中具有应用作用。 | 马超 郑永军 谭彧 Yubin Lan 王书茂 | 2015 | 农业工程学报2015，31，S1： | 15 |
| 9 | Modelling operation parameters of UAV on spray effects at different growth stages of corns显示文摘Currently,unmanned aerial vehicles(UAVs)were widely applied to spray for pest and disease control.However,spray effect can be further improved by setting operation parameters more reasonably and scientifically.Therefore,this study attempts to derive the relationship between operation parameters and spray effect.Different growth stages were distinguished by various corn heights.A six-rotor UAV was operated at different heights and velocities to test pesticides spray effects for corns at different growth stages.Different plant canopy coverage rate and penetrating coefficients were obtained,according to which,the effects on droplet deposition rate caused by different UAVs’operation parameters were analyzed.Droplet penetrating coefficients were applied as indexes to evaluate and select UAVs operation parameters for corns at different growth stages respectively.Mathematical models of droplet penetrating coefficients with UAVs operation parameters were established for corns at all growth stages.The determination coefficients(R2)of all models were greater than 0.90 and average relative errors were within 20%,which asserted high forecasting accuracy of droplet penetrating rate.With the help of the models,parameters like operating height away from the bottom of corns and UAVs velocities were further analyzed,which guided the optimization of parameter settings and selection of spray methods for corns at different growth stages. | Zheng Yongjun Yang Shenghui Zhao Chunjiang Chen Liping Yubin Lan Tan Yu | 2017 | International Journal of Agricultural and Biological Engineering2017，10，3： | 13 |
| 10 | 中国农业航空植保产业技术创新发展战略显示文摘保证粮食安全是中国的基本国策。然而,在当前中国粮食作物生产过程中,植保仍以手工、半机械化操作为主。据统计,中国目前使用的植保机械以手动和小型机(电)动喷雾机为主,其中手动施药药械、背负式机动药械分别占国内植保机械保有量的93.07%和5.53%,拖拉机悬挂式植保机械约占0.57%,植保作业投入的劳力多、劳动强度大,施药人员中毒事件时有发生。据报道,广东省部分地区每天200元已请不到人工施药。目前国内农药用量越来越大,作业成本高,且浪费严重,资源有效利用率低下,作物产量和质量难以得到保障,同时带来严重的水土资源污染、生态系统失衡、农产品品质下降等问题,无法适应现代农业发展的要求。 | 周志艳 臧英 罗锡文 Lan Yubin 薛新宇 | 2014 | 农业技术与装备2014，，5： | 13 |
| 11 | GSA:Genome Sequence Archive显示文摘With the rapid development of sequencing technologies towards higher throughput and lower cost, sequence data are generated at an unprecedentedly explosive rate. To provide an efficient and easy-to-use platform for managing huge sequence data, here we present Genome Sequence Archive(GSA; http://gffzzdbc7b6aaae734bddhubwvbf5fnn0c6ucq.ffgz.tsg.suse.edu.cn/gsa or http://gffzz4eaf941a184140e3hubwvbf5fnn0c6ucq.ffgz.tsg.suse.edu.cn), a data repository for archiving raw sequence data. In compliance with data standards and structures of the International Nucleotide Sequence Database Collaboration(INSDC), GSA adopts four data objects(Bio Project, Bio Sample,Experiment, and Run) for data organization, accepts raw sequence reads produced by a variety of sequencing platforms, stores both sequence reads and metadata submitted from all over the world,and makes all these data publicly available to worldwide scientific communities. In the era of big data, GSA is not only an important complement to existing INSDC members by alleviating the increasing burdens of handling sequence data deluge, but also takes the significant responsibility for global big data archive and provides free unrestricted access to all publicly available data in support of research activities throughout the world. | Yanqing Wang Fuhai Song Junwei Zhu Sisi Zhang Yadong Yang Tingting Chen Bixia Tang Lili Dong Nan Ding Qian Zhang Zhouxian Bai Xunong Dong Huanxin Chen Mingyuan Sun Shuang Zhai Yubin Sun Lei Yu Li Lan Jingfa Xiao Xiangdong Fang Hongxing Lei Zhang Zhang Wenming Zhao | 2017 | Genomics, Proteomics & Bioinformatics2017，15，1： | 13 |
| 12 | Effect of aerial spray adjuvant applying on the efficiency of small unmanned aerial vehicle for wheat aphids control显示文摘Small unmanned aerial vehicles(UAVs)have been widely used in different aspects of modern farming management,including pest and disease control in China in recent years.In this study,the spray performance of a small plant protection UAV at low volume spray was evaluated by adjusting the pesticide dosage and adding aerial spraying adjuvants.Droplet deposition,droplet density,coverage,control effect and pesticide residue from field trials were assessed.In addition,the residue and control effect of UAV spray were compared to manual knapsack at high volume spray.The results showed that,the adjuvant applying improved the efficiency of UAV spray.Also,the adjuvant applying reduced the dosage of imidacloprid by 20%.However,there was no significant difference on initial residue between UAV spray and knapsack spray.Thus,plant protection UAV spraying pesticide by adding appropriate adjuvant showed the ability of improving the pesticide effectiveness by improving the control efficiency,reducing the pesticide dosage and residue. | Yanhua Meng Yubin Lan Guiying Mei Yongwang Guo Jianli Song Zhiguo Wang | 2018 | International Journal of Agricultural and Biological Engineering2018，11，5： | 13 |
| 13 | Multispectral imaging systems for airborne remote sensing to support agricultural production management显示文摘This study investigated three different types of multispectral imaging systems for airborne remote sensing to support management in agricultural application and production.The three systems have been used in agricultural studies.They range from low-cost to relatively high-cost,manually operated to automated,multispectral composite imaging with a single camera and integrated imaging with custom-mounting of separate cameras.Practical issues regarding use of the imaging systems were described and discussed.The low-cost system,due to band saturation,slow imaging speed and poor image quality,is more preferable to slower moving platforms that can fly close to the ground,such as unmanned autonomous helicopters,but not recommended for low or high altitude aerial remote sensing on fixed-wing aircraft.With the restriction on payload unmanned autonomous helicopters are not recommended for high-cost systems because they are typically heavy and difficult to mount.The system with intermediate cost works well for low altitude aerial remote sensing on fixed-wing aircraft with field shapefile-based global positioning triggering.This system also works well for high altitude aerial remote sensing on fixed-wing aircraft with global positioning triggering or manually operated.The custom-built system is recommended for high altitude aerial remote sensing on fixed-wing aircraft with waypoint global positioning triggering or manually operated. | Yanbo Huang Steven J.Thomson Yubin Lan Stephan J.Maas | 2010 | International Journal of Agricultural and Biological Engineering2010，3，1： | 12 |
| 14 | Drift and deposition of pesticide applied by UAV on pineapple plants under different meteorological conditions显示文摘Spray drift has always been a focus research area in the field of unmanned aerial vehicle(UAV)application.Under the fixed premises of UAV operating parameters,such as height,speed and spraying liquid,the droplet drift is mainly affected by meteorological conditions.In this research,the spray drift and deposition tests were conducted using a QuanFeng120 UAV in a pineapple field under various different meteorological conditions.The experimental results showed that with the changes of UAV operating height and wind speed,the start position of the in-swath deposition area changed 4 m in the extreme situation.The percentage of the total spray drift was from 15.42%to 55.76%.The position of cumulative spray drift that accounted for 90%of the total spray drift was from 3.70 m to 46.50 m relative to the flight line.According to the downwind spray drift curve,the nonlinear equations of the same type under the four operating conditions of the UAV were fitted.The spray drift and the deposition of UAV application were significantly affected by different meteorological conditions and UAV operating heights.The results could provide a theoretical basis for UAV spraying in pineapple plants and support for spray drift control and prediction. | Juan Wang Yubin Lan Huihui Zhang Yali Zhang Sheng Wen Weixiang Yao Jiajian Deng | 2018 | International Journal of Agricultural and Biological Engineering2018，11，6： | 10 |
| 15 | Design and test of operation parameters for rice air broadcasting by unmanned aerial vehicle显示文摘Considering the difficulty of broadcasting in the small plots and complex terrain in South China,this research aimed to explore a new efficient broadcasting way and figure out advisable operation parameters by using a hollow 12-axis,rotor-wing Unmanned Aerial Vehicle(UAV)which is typically made up of four groups of solid support structure,with each consisting of three axes and two rotor wings.A 3.7 L reverse pyramid-shape seed hopper with a 60 mm×13 mm rectangular outlet at the bottom was designed to realize self-gravity seeding.Rice seed firstly directly falls on the rotating disc driven by direct-current dynamo before being sown.The disc was located 120 mm above the ground,with a diameter of 350 mm.Under constant flight conditions,parameters of the on-board broadcasting devices(dropping speed referring to speed for the outlet and the broadcasting speed for the disc’s rotation speed)determine the uniformity of air broadcasting.The FUTABA T8FG transmitter and receiver system were employed as the remote control device.When the UAV flies at 3 m/s and 2 m above the ground with an expected seeding of 180 grain/m^(2),the RD(Right Down)knob marked 29 and LD(Left Down)knob marked-24 with a disc rotation speed of 900 r/min,the broadcasting lasts for 15 seconds with a 25%opening(1.95 cm^(2))of rectangular outlet.In order to verify the feasibility of air broadcasting parameters,the project team carried out a field broadcasting test by using a hollow multi-rotor UAV at Zhongluotan Test Base in Guangzhou in July,2014.In the square field plots of 0.09 hm^(2),flying path of air broadcasting operation was designed.The collected sampling data of broadcasting quantity per unit area after the test showed that there were,on average,187.4 grains/m^(2)of the five sampling points with a standard deviation of 22.77,and a coefficient of variation of 12.15%which was far smaller than that of artificial broadcasting.The average yield of field broadcasted by UAV is 7705.5 kg/hm^(2)in 2014,implying that rice air broadcasting by UAV is feasible. | Li Jiyu Lan Yubin Zhou Zhiyan Zeng Shan Huang Cong Yao Weixiang Zhang Yang Zhu Qiuyang | 2016 | International Journal of Agricultural and Biological Engineering2016，9，5： | 10 |
| 16 | 微型电动拖拉机的研究与设计显示文摘针对现今用于温室内耕作的机械存在操作不灵便、作业人员劳动强度大和污染严重等问题,设计了一种适用于温室大棚犁耕作业的微型电动拖拉机,重点对整机电驱动系统主要部件的性能进行研究,完成了这些部件参数的计算和整机的空间布局;在此基础上,制作了温室微型电动拖拉机的样机。样机初步在道路和田间试验结果表明,整机满足设计要求,能够正常进行犁耕作业,且具有低碳环保、操作方便的优点。 | 卢毅 杨福增 刘永成 LAN Yubin 陈志 刘世 刘恒培 | 2013 | 机械设计2013，30，3： | 8 |
| 17 | Optimization of variables for maximizing efficacy and efficiency in aerial spray application to cotton using unmanned aerial systems显示文摘Aerial spraying can support efficient defoliation without crop contact.With the recent introduction to unmanned aerial system(UAS)for aerial spraying in China,there is a need to determine the optimum application variables to achieve high efficacy and efficiency with low costs.The present research involved field studies across two annual cotton production seasons in North Xinjiang,China.Four factors,including volume rate(A),tank mix including spray adjuvants(B),flight altitude(C),flight speed(D)and three levels of L9(3^(4))orthogonal arrays were carried out to optimize the application parameters for three types of UASs.These included different numbers of rotors as follows:four-rotors,six-rotors and eight-rotors.Spray coverage,distribution uniformity(coefficient of variation(CV)of droplet coverage),rates of cotton defoliation and boll opening,application efficiency and cost were measured and assessed.Results showed that:(1)the rates of defoliation and boll opening by aerial cotton defoliant application could meet the requirement of cotton mechanized harvesting;(2)the optimal scenario for the three UASs was A_(3)B_(2)C_(1)D_(3),Volume rate(A3):48 L/hm^(2);Tank mix and concentration(B_(2)):(Tuotulong 225+Sujie 750+Ethephon 2250)mL/hm^(2),Flight altitude(C_(1)):1.5 m,and Flight speeds(D_(3))for unmanned helicopters with four-rotors,six-rotors and eight-rotors were 3.12 m/s,2.51 m/s and 3.76 m/s,respectively.These results can provide guidance for cotton defoliant aerial spraying in China using UAS. | Juan Liao Ying Zang Xiwen Luo Zhiyan Zhou Yubin Lan Yu Zang Xiuyan Gu Weiming Xu Andrew John Hewitt | 2019 | International Journal of Agricultural and Biological Engineering2019，12，2： | 6 |
| 18 | Integrated sensor system for monitoring rice growth conditions based on unmanned ground vehicle system显示文摘Ground-based platform systems provide a good tool for monitoring and managing crop conditions in precision agriculture applications and have been widely used for monitoring crop conditions.To develop an unmanned ground vehicle system(UGVS)based multi-sensors and test the feasibility of this system for monitoring rice conditions,an UGVS was developed to collect real-time rice condition information including NDVI values,reflectance measurements and crop canopy temperature in this study.Major components of the integrated system are GreenSeeker R100 system,hyper-spectroradiometer and infrared temperature sensor.The leaf area index(LAI)was measured by the CGMD302 Spectrometer.The Independent Samples T-Test method and the one way ANOVA method were used to determine the best spectral indices and analyze the relationship between the vegetation indices and rice LAI.It was found that the two best spectral indices for estimating LAI were NDVI(860 nm and 750 nm)with the correlation coefficient(R^(2))at 0.745 and RVI(853 nm and 751 nm)with the R^(2)at 0.724.The results show the UGVS can support multi-source information acquisition and is useful for crop management and precision agriculture applications. | Wang Pei Yubin Lan Luo Xiwen Zhou Zhiyan Zhigang Wang Yonghui Wang | 2014 | International Journal of Agricultural and Biological Engineering2014，7，2： | 6 |
| 19 | Evaluation of droplet deposition and effect of variable-rate application by a manned helicopter with AG-NAV Guía system显示文摘The variable-rate application is an important aspect of precision agriculture.In order to determine the regular patterns of droplet deposition and compare the actual variable-rate spraying effect of the AS350B3e helicopter with the AG-NAV Guía system,spray tests were conducted with different operating parameters and operating methods.In this study,the deposition distribution of droplets in the effective swath area was evaluated for six single-pass applications at four different flight velocities.The effects of adding adjuvant on droplet deposition,drift and droplet size were compared,and the actual variable effect of the forth-back application was verified.The analysis results showed that the position of the effective swath area was affected by natural wind velocity and wind direction,and would shift to the downwind direction area from the helicopter route of a different degree.The effective swath width increased slowly and then decreased sharply with the increase of flight velocity.It was found that flight velocity of 100 km/h was the peak inflection point of effective spray width variation.Moreover,the effect of flight velocity on the distribution uniformity of droplet deposition in the effective swath area was not significant.In the single-pass application of 90 km/h,adding adjuvant could increase droplet size in the effective swath area.The deposition increased by 8.98%,and the total drift decreased by 28.65%,of which the upwind drift decreased by 28.31%and the downwind drift decreased by 29.06%.In the forth-back application of 90 km/h,the error between actual application volume and system setting dose was 12%.The results of this study can provide valuable references for future research and practices on variable-rate aerial applications by manned helicopters. | Weixiang Yao Yubin Lan Sheng Wen Huihui Zhang Yali Zhang Juan Wang Chunchun Xie | 2019 | International Journal of Agricultural and Biological Engineering2019，12，1： | 6 |
| 20 | Design and test of fault monitoring system for corn precision planter显示文摘With the growing demand and working complexity of corn precision planter,it becomes more important to monitor the working performance through intelligent systems.A new fault monitoring system for corn precision planters was designed and tested.This system consisted of the information acquisition module,controller module,alarm module,input module and display module.A capacitive sensor was utilized to monitor the seed flow without changing the track of a precision planter.This system can monitor the whole sowing process of a seed-metering device in real-time.The sowing status,fault type and fault location can be displayed on liquid crystal display(LCD).Warning light on the LCD reminds the operator of abnormal conditions.Bench tests and field tests showed that the minimum monitoring accuracies of missing sowing and total sowing number were 92.11%and 94.28%,respectively,and the seed level sensor and the opener sensor worked well.This system can accurately prompt the seed-metering mechanism in real-time. | Qi Jiangtao Jia Honglei Li Yang Yu Haibo Liu Xinhui Lan Yubin Feng Xianzhen Yang Yongxi | 2015 | International Journal of Agricultural and Biological Engineering2015，8，6： | 6 |
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