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Optimal flight parameters of unmanned helicopter for tea plantation frost protection

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International Journal of Agricultural and Biological Engineering 2015年第5期8卷 50-57页

作者： Hu Yongguang Liu Shengzhong Wu Wenye wang jizhang Shen Jianwen School of Agricultural Equipment Engineering Jiangsu UniversityZhenjiang 212013China Electronic Application Laboratory of Wuxi Hanhe Unmanned Helicopters Wuxi 214135China

To determine proper flight parameters of an unmanned helicopter for tea plantation frost protection,field experiments were conducted to study the impact of flight height,speed and interval on airflow disturbance and temperature rise around tea canopies based on the analysis and simulation of frost protection with a certain *** relationship between temperature rise after flight and the above flight parameters was established through a regression orthogonal experiment,based on which the optimal combination of flight parameters was obtained through the single-factor golden section *** results showed that wind speed around tea canopies decreased with the increase of flight height when flight speed was *** was a multivariate linear relationship between temperature rise and flight parameters,and the sequence of flight parameters’influence on frost protection effect was flight interval,flight height,flight *** optimal combination of flight parameters were flight height of 4.0 m,flight speed of 6.0 m/s and flight interval of 20 *** the flight with the above parameters air temperature around tea canopies increased 1.6℃ when background thermal inversion strength was 3.8℃.

关键词： thermal inversion frost protection unmanned helicopter flight parameters orthogonal experiment single-factor golden section method tea plants

Manage system for internet of things of greenhouse based on GWT

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Information Processing in Agriculture 2018年第2期5卷 269-278页

作者： jizhang wang Jinsheng Zhou Rongrong Gu Meizheng Chen Pingping Li Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education and Jiangsu ProvinceInstitute of Agricultural EngineeringJiangsu UniversityZhenjiang 212013China College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China

In order to fit the different demands for the internet of things system of greenhouse environment monitoring and control,the greenhouse environment monitoring and control management system based on Google Web Toolkit(GWT)was *** remote method call(RPC)AJAX as the communication method between browser and web server,the system realized the functions such as:configuration of acquisition and control parameters,the adaptive match of database between gateway and server,the adaptive diagnosis of monitoring parameters,the warning of monitoring parameters,the adaptive generation of interface,and so *** functions of the system was tested the results shows that the WEB browser application and Android App can adaptively realize the greenhouse environment monitoring and control according to the information configuration.

关键词： Greenhouse Internet of things Monitoring and control system Software

Development status and trend of agricultural robot technology

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International Journal of Agricultural and Biological Engineering 2021年第4期14卷 1-19页

作者： Yucheng Jin Jizhan Liu Zhujie Xu Shouqi Yuan Pingping Li jizhang wang Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013JiangsuChina College of Biology and the Environment Nanjing Forestry UniversityNanjing 210042China

In the face of the contradiction between the increasing demand for agricultural products and the sharp reduction of agricultural resources and labor force,agricultural robot technology is developing explosively on the basis of decades of technical and industrial *** view of the complexity and particularity of the development of agricultural robot technology,it is of great value to summarize its development characteristics and make reasonable judgments on its development *** this paper,the type of agricultural robot systems was first *** the classification of agricultural robot systems,the development of main types of monitoring robots,non-selective and selective working robots for crop farming,livestock and poultry farming and aquaculture were introduced in *** the scientific research,core technology,and commercialization of different types of agricultural robots were *** is believed that navigation in complex agricultural environments,damage-free robot-crop interaction,and agronomy-robot fusion have high scientific value and significance to promote the revolutionary advances in agricultural robot *** characteristics of inter-discipline between agricultural robot technology and new materials,artificial intelligence,bionics,agronomy are research *** fast damage-free operation,autonomous navigation for complex environments,target detection for complex backgrounds,and special design for agricultural robots are considered to be the key technology of agricultural robot development,and the development path is ***,robot-crop interaction simulation,big data support,and artificial intelligence are regarded as paths to realize the breakthrough of key agricultural robot *** summary and prospect of this paper are of positive significance to promote the overall development of agricultural robot technology.

关键词： agricultural robot type selective non-selective trend

Tensile mechanical properties of greenhouse cucumber cane

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International Journal of Agricultural and Biological Engineering 2016年第5期9卷 1-8页

作者： Xu Yunfeng Zhang Xiliang Sun Xiaojia wang jizhang Liu Jizhan Li Zhiguo Guo Qian Li Pingping Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education and Jiangsu ProvinceInstitute of Agricultural EngineeringJiangsu UniversityZhenjiang 212013China School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013China University of Birmingham EdgbastonBirminghamB152TTUK College of Forest Resource and Environment Nanjing Forestry UniversityNanjing 210037China

To obtain the mechanical properties of greenhouse cucumber cane,tensile and shear properties of the greenhouse cucumber cane were studied by using computer-controlled electronic universal testing machine and homemade cutting test bench,***,the root,middle and head of cucumber cane were subjected for tensile *** tensile stress-strain curves showed that the root of cumber cane presented the characteristics of plastic material,while the middle and head showed the characteristics of brittle *** average tensile strength of root,middle and head of fresh cucumber cane were 7.35 MPa,6.30 MPa and 4.68 MPa,*** average elastic modulus of root of fresh cucumber cane was 280.58 MPa,which was much greater than the middle and head with average elastic modulus of 198.81 MPa and 137.22 MPa,respectively.A pendulum impact cutting test-rig and a cutting force measurement system composed of a cantilever weigh sensor,a high frequency DAQ card and motion control card were *** cutting mechanical property experiments of different parts of greenhouse cucumber cane were carried out,and the continuous curves of cutting force were *** single factor test for cross-sectional area,cutting speed,cutting tool type and manner were *** results indicated that the peak cutting force increased approximately linearly with the increasing of cutting sectional area,but decreased gradually with the increasing of cutting *** the same conditions,the cutting force could be reduced by using straight blade cutting tool and ramp cutting *** the multifactor interaction impact test of the cutting way,the blade type and the cutting speed,it was found that the corresponding F-value of the three factors were 21.316,49.141 and 0.222,which suggests that the blade type is the most significant factor for the cutting force.

关键词： cucumber cane mechanical properties modulus of elasticity tensile strength cutting force

Numerical simulation of particle motion at cucumber straw grinding process based on EDEM

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International Journal of Agricultural and Biological Engineering 2020年第6期13卷 227-235页

作者： Yunfeng Xu Xiliang Zhang Shuo Wu Cheng Chen jizhang wang Shouqi Yuan Bin Chen Pingping Li Rongjun Xu National Research Center of Pumps Jiangsu UniversityZhenjiang 212013JiangsuChina Lanshen Group Co. Ltd.Nanjing 211500China School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education and Jiangsu ProvinceJiangsu UniversityZhenjiang 212013JiangsuChina College of Biology and Environment Nanjing Forestry UniversityNanjing 210037China

Simulation of straw grinding process based on discrete element method(DEM)was *** to the force analysis and kinematics analysis,the differential equation of straw particle motion on hammers was deduced,and the formation mechanism of the material circulation layer was *** model of grinder,particle model and contact model were established by EDEM *** influence of hammer number,hammer thickness and gap of the hammer-sieve on particle grinding number and power consumption were obtained by single factor simulation *** grinding process is divided into three *** hammer smashing plays a dominant role in 0-0.25 *** the hammer smashing particle number increases slowly and then decreases to the lowest level in 0.25-0.60 s,the tooth plate smashing particle number increases rapidly and dominates,and then forming a material circulation *** hammer and tooth plate smashing particle number is basically stable in 0.60-2.00 s,and the tooth plate smashing occupies the dominant *** the increase of the number and thickness of hammers,the power consumption of crusher tends to increase,and with the increase of the gap between hammers and sieves,the power consumption of crusher decreases first and then *** results can provide guidance for the development of high-efficiency and energy-saving grinding equipment for cucumber straw.

关键词： cucumber straw grinding process particle motion numerical simulation EDEM

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铝合金铸造中冷铁作用效果的研究

特种铸造及有色合金 2011年第10期31卷 961-963页

作者：王继章杨晶王宁中北大学材料科学与工程学院

通过试验与数值模拟相结合的方法,研究了冷铁厚度对T型铝铸件缺陷位置的影响,并根据T型铝铸件不同点处温度的变化来研究冷铁的有效作用距离。结果表明,当冷铁厚度增大到30mm后,缺陷位置和冷铁的有效作用距离不再随着冷铁厚度的增加而改... 详细信息

通过试验与数值模拟相结合的方法,研究了冷铁厚度对T型铝铸件缺陷位置的影响,并根据T型铝铸件不同点处温度的变化来研究冷铁的有效作用距离。结果表明,当冷铁厚度增大到30mm后,缺陷位置和冷铁的有效作用距离不再随着冷铁厚度的增加而改变。该研究对铝铸件的凝固过程中冷铁的应用具有参考作用。

关键词： T型铝铸件冷铁厚度缺陷位置有效作用距离

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温室环境信息智能化管理研究进展

农业机械学报 2014年第4期45卷 236-243页

作者：李萍萍王纪章南京林业大学森林资源与环境学院南京210037 江苏大学现代农业装备与技术教育部重点实验室镇江212013

随着我国温室园艺业和信息技术的迅速发展,现代信息技术越来越多地应用于温室环境管理中,促进了温室环境智能化管理技术的发展。本文针对面向物联网的温室环境信息智能化管理需求,分别从温室环境信息获取、信息处理与决策服务3个方面对... 详细信息

随着我国温室园艺业和信息技术的迅速发展,现代信息技术越来越多地应用于温室环境管理中,促进了温室环境智能化管理技术的发展。本文针对面向物联网的温室环境信息智能化管理需求,分别从温室环境信息获取、信息处理与决策服务3个方面对国内外研究进展进行了系统的分析和阐述,并提出了今后在温室环境信息智能化管理方面迫切需要开展的工作。

关键词：温室环境智能化管理物联网

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基于数字孪生的拖拉机混流装配智能排产仿真评价

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农业机械学报 2024年第4期55卷 385-393页

作者：王纪章刘哲高志恒王涛江苏大学农业工程学院镇江212013

车间排产对提高车间的效率至关重要,智能排产可以极大提高加工的自动化和智能化水平。但传统生产过程中大多采用固定的工时数据进行产线作业时间估算,而拖拉机混流装配以工人作业为主,工人作业时间不固定甚至存在较大差异。为满足智能... 详细信息

车间排产对提高车间的效率至关重要,智能排产可以极大提高加工的自动化和智能化水平。但传统生产过程中大多采用固定的工时数据进行产线作业时间估算,而拖拉机混流装配以工人作业为主,工人作业时间不固定甚至存在较大差异。为满足智能排产要求,提出通过数字孪生车间对生产计划进行仿真评价以增强与实际车间的交互与反馈。搭建与现场拖拉机装配线一致的数字孪生三维模型场景及人机交互界面,根据MES系统中的过点信息实现装配线模型实时驱动,建立了一个拓展性强、可灵活复用的数字孪生系统。分析了生产计划评价指标,提出通过生产计划管理系统与孪生装配线的交互反馈,实现对基于数字孪生装配线的生产计划仿真运行及评价。通过数字孪生装配线采集到的实际工时仿真运行生产计划,可以得到优化后的生产计划。将低产、正常和高产月份各5 d内的实际生产计划与本系统生成的计划进行对比,结果表明本系统仿真评价后得到的生产计划更优越。

关键词：智能排产拖拉机装配线数字孪生实时驱动仿真评价

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可组合式堆肥发酵多层温度自适应监测系统设计与试验

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农业机械学报 2023年第2期54卷 359-367页

作者：王纪章茆寒王旭周静江苏大学农业工程学院镇江212013

堆肥发酵是农业废弃物基质化、肥料化利用的一个重要技术手段。在堆肥发酵过程中,温度影响着发酵堆的发酵速率、发酵质量,因此研究发酵堆内部的温度分布对于发酵堆的精准管控至关重要。但由于不同堆置方式的发酵堆体积、高度不同导致传... 详细信息

堆肥发酵是农业废弃物基质化、肥料化利用的一个重要技术手段。在堆肥发酵过程中,温度影响着发酵堆的发酵速率、发酵质量,因此研究发酵堆内部的温度分布对于发酵堆的精准管控至关重要。但由于不同堆置方式的发酵堆体积、高度不同导致传统固定探针式传感器难以灵活、便捷地进行针对性测量,给农业废弃物发酵过程的精准管控带来极大不便。针对以上问题,设计了一种杆体模块化、可拼接的低功耗组合式多层温度监测系统。实现了基于CAN总线的检测模块自适应识别,基于JSON封装与关系数据库的配置信息同步与自适应匹配,以及系统现场端、服务器端、微信小程序端人机界面自适应生成。经过功能、功耗以及系统实际测试,结果表明,监测系统可以实现连续监测过程中实时数据监测、低功耗运行,具备良好的稳定性,并且实现了系统硬件、服务器端、微信小程序端的同步配置、信息显示等功能,满足废弃物堆肥发酵过程的温度多层长期监测需求。

关键词：农业废弃物堆置发酵温度监测可组合式

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