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Design and experiment of electro hydraulic active suspension for controlling the rolling motion of spray boom

International Journal of Agricultural and Biological Engineering 2019年第4期12卷 72-81页

作者： Longfei Cui Xinyu Xue Feixiang Le hanping mao Suming Ding Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture and Rural AffairsNanjing 210014China Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013China

Boom sprayer is one of the most commonly used plant protection machinery for spraying *** have shown that the efficiency of chemicals is highly correlated with the uniformity of spray distribution *** the boom is a large and flexible structure,boom rolling leads to overlapping and leakage of the *** order to improve spray uniformity,the boom attitude should be kept parallel to the ground slope or to the crop canopy beneath the *** suspension can attenuate frequencies above its resonance frequency,but nothing can be done to align the boom to the sloping ***,an active suspension system is designed,which includes DSP-based controller,a servo valve,a hydraulic cylinder,two ultrasonic sensors,one inertial attitude sensor,and the developed control *** order to prevent the wrong response of the control system caused by the high frequency component due to uneven crop canopy or rough ground.A special signal processing algorithm was proposed,including the limiting filter,smoothing algorithm and data fusion algorithm based on optimal *** transient and steady-state performances of the boom control system using velocity feedforward PID algorithm were tested on a six DOF motion *** can be seen that the low-frequency tracking performance of the boom was greatly improved after the electro-hydraulic active suspension was *** the resonance frequency,the peak angle of active suspension and passive suspensions are 0.72°and 1.29°respectively,and the resonance peak is greatly *** controller was implemented on a self-propelled boom sprayer and validated under field conditions,the standard deviation of the roll angle of the boom with active suspension is 0.40°,compared with 1.04°of the sprayer *** results show that the active suspension control system can effectively reduce the effect of ground excitation disturbance on the application process,and has good tracking performance for

关键词： boom sprayer active suspension electro-hydraulic servo system six DOF motion simulator signal process motion control

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植物生长调节剂通过克隆整合对空心莲子草顶端和基部生长的不同作用

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Journal of Plant Ecology 2022年第3期15卷 650-662页

作者： Shanshan Qi Susan Rutherford Furong He Bi-Cheng Dong Bin Zhu Zhicong Dai Weiguo Fu hanping mao Daolin Du Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationSchool of Agricultural EngineeringJiangsu UniversityZhenjiang 212013China Institute of Environment and Ecology School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China School of Nature Conservation Beijing Forestry UniversityHaidianBeijing 100083China University of Hartford Department of BiologyWest HartfordCT 06117USA Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009Jiangsu ProvinceChina

入侵植物不仅对全球生物多样性造成了巨大的威胁,同时也严重影响了农业生产与粮食安全。克隆整合使得相连植株进行资源共享,能促进入侵植物的生长从而获得优势。然而,入侵杂草在植物调节剂(plant growth regulators,PGRs)影响下的克隆... 详细信息

入侵植物不仅对全球生物多样性造成了巨大的威胁,同时也严重影响了农业生产与粮食安全。克隆整合使得相连植株进行资源共享,能促进入侵植物的生长从而获得优势。然而,入侵杂草在植物调节剂(plant growth regulators,PGRs)影响下的克隆整合作用则很少有报道。PGRs被广泛应用于农作物生产上,并能通过土壤淋溶、侵蚀和径流作用,影响分布在作物附近的农田杂草的生长。本研究采用两种PGRs赤霉素(gibberellins,GA)和多效唑(paclobutrazol,PAC)处理恶性入侵杂草空心莲子草(Alternanthera philoxeroides)基端,并保持或者通过剪切达到控制基端与顶端的连通,从而探究克隆整合作用在空心莲子草响应两种农业常用PGRs中的作用。研究结果表明,GA和PAC对空心莲子草生长的作用相反。GA通过克隆整合作用显著促进顶端植株的地上生长。相反地,PAC显著抑制基端和顶端的地上生长,但是能够通过克隆整合作用显著促进基端和顶端的地下生长。这些研究结果解释了克隆整合作用能促进PGRs对空心莲子草生长的促进作用,这很可能是外来杂草能够成功入侵人为干扰较多的农业生态系统的重要原因之一。

关键词：农田杂草外来克隆植物表型特征植物激素植物入侵

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Separation-enrichment method for airborne disease spores based on microfluidic chip

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 199-205页

作者： Yafei Wang Xiaodong Zhang Ning Yang Guoxin Ma Xiaoxue Du hanping mao School ofAgricultural Engineering Jiangsu UniversitZhenjiang 212013JiansiChina Key Laboratory of Moderm Agricultural Equipment and Techmology Ministry of EducationJiangsu UniversitZhenjiang 212013JiangsuChina School of Electrical and Informnation Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

Airborne diseases are likely to cause crop yield reduction,which has aroused widespread *** this study,a two-stage separation-enrichment structure microfluidic chip with a compound field for separation and enrichment of the greenhouse crops airborne disease spores directly from gas flow was *** chip is mainly composed of three parts:arc structure pretreatment channel,semicircular electrode structure and collection *** 5.1 software was used to simulate the designed microfluidic chip.30μm particles were used to represent *** spores,25μm particles were used to represent *** spores,and 16μm particles were used to represent *** *** simulation results showed that the separation and enrichment efficiency of 16μm particles,25μm particles,and 30μm particles was 88%,91%,and 94%,*** experimental verification results were observed under a *** results showed that the separation and enrichment efficiency of *** spores,*** spores and *** spores was 75.7%,83.8%and 89.4%,*** a result,the designed microfluidic chip can be used to separate and enrich the spores of airborne diseases of greenhouse crops,which can provide a basis for the research of real-time monitoring technology for greenhouse airborne diseases.

关键词： greenhouse crop disease airborne spore microfluidic chip

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Nondestructive diagnostics of soluble sugar,total nitrogen and their ratio of tomato leaves in greenhouse by polarized spectra-hyperspectral data fusion

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International Journal of Agricultural and Biological Engineering 2020年第2期13卷 189-197页

作者： Wenjing Zhu Jinyang Li Lin Li Aichen Wang Xinhua Wei hanping mao School of Agricultural Equipment Engineering Jiangsu UniversityZhenjiang 212013China Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013China

Polarized spectra-hyperspectral data fusion technique was used to estimate the soluble sugar(SS),total nitrogen(N),and their ratio(SS/N),of greenhouse tomato *** tomato leaves of five different growth stages(seedling,flowering,initial fruiting,mid-fruiting and picking stage)and five different nitrogen treatments(severe stress 25%,moderate stress 50%,mild stress 75%,normal 100%,and excess 150%)at every stage were collected for spectra acquisition and SS and N *** reflectance spectra were acquired with a polarization reflectance spectrum spectro-goniophotometer system and four polarization degree features were *** data were collected with a hyperspectral imaging system and four reflectance spectrum features and eight image features were ***,models were built with polarization degree features,image features,and spectral features *** and nonlinear fusion methods were comparatively used for modeling based on normalized data of the three *** results suggest that the performances of SS/N models are better than those of N and SS models,and the prediction capability of the Support Vector Machine(SVM)models of N and SS/N are superior to those obtained with single kind *** work indicates that the polarized spectrum-hyperspectral multidimensional information detecting method can feasibly judge the tomato nutrient stress ***-features data fusion analysis technique can enhance the prediction accuracy of spectral diagnostics technology in precision agriculture.

关键词： polarized spectra hyperspectral soluble sugar(SS) total nitrogen(N) data fusion tomato leaf

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Recognition of weeds at asparagus fields using multi-feature fusion and backpropagation neural network

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International Journal of Agricultural and Biological Engineering 2021年第4期14卷 190-198页

作者： Yafei Wang Xiaodong Zhang Guoxin Ma Xiaoxue Du Naila Shaheen hanping mao School of Agricultural Engineering Jiangsu UniversityZhenjiang 212013China Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013JiangsuChina School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

In order to solve the problem of low recognition rates of weeds by a single feature,a method was proposed in this study to identify weeds in Asparagus(Asparagus officinalis L.)field using multi-feature fusion and backpropagation neural network(BPNN).A total of 382 images of weeds competing with asparagus growth were collected,including 135 of Cirsium arvense(L.)Scop.,138 of Conyza sumatrensis(Retz.)***,and 109 of Calystegia hederacea *** grayscale images were extracted from the RGB images of weeds using the 2G-R-B *** segmentation of the grayscale image of weeds was applied using Otsu *** the internal holes of the leaves were filled through the expansion and corrosion morphological operations,and other interference targets were removed to obtain the binary *** foreground image was obtained by masking the binary image and the RGB ***,the color moment algorithm was used to extract weeds color feature,the gray level co-occurrence matrix and the Local Binary Pattern(LBP)algorithm was used to extract weeds texture features,and seven Hu invariant moment features and the roundness and slenderness ratio of weeds were extracted as their shape *** to the shape,color,texture,and fusion features of the test samples,a weed identification model was *** test results showed that the recognition rate of Cirsium arvense(L.)Scop.,Calystegia hederacea *** Conyza sumatrensis(Retz.)*** were 82.72%(color feature),72.41%(shape feature),86.73%(texture feature)and 93.51%(fusion feature),***,this method can provide a reference for the study of weeds identification in the asparagus field.

关键词： weeds recognition image processing feature extraction multi-feature fusion BP neural network asparagus field

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Identification of pesticide residue level in lettuce based on hyperspectra and chlorophyll fluorescence spectra

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International Journal of Agricultural and Biological Engineering 2016年第6期9卷 231-239页

作者： Sun Jun Zhou Xin mao hanping Wu Xiaohong Zhang Xiaodong Gao Hongyan School of Electrical and Information Engineering of Jiangsu University Zhenjiang 212013China Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013China

Fast identification of pesticide residue level in lettuce leaves plays a key role in the test of food *** order to identify the different concentrations pesticide residues of lettuce leaves in a fast and nondestructive way,the hyperspectra coupled with chlorophyll fluorescence spectra was used in this *** electron microscopy(TEM)was used to identify the microstructure changes of lettuce leaves under different concentrations of dimethoate ***,a method involving wavelet transform and MD-MCCV algorithm(WT-MD-MCCV)was developed for identifying the optimal wavelengths of the spectral *** hyperspectra and chlorophyll fluorescence spectra data of 150 lettuce leaf samples at five different concentrations of pesticide residues were obtained using hyperspectral data acquisition device and Cary Eclipse Fluorescence *** combination of Savitzky-Golay(SG)algorithm and SNV algorithm(SG-SNV)preprocessing algorithms was used to preprocess the raw *** addition,Principal Component Analysis(PCA),Successive Projections Algorithm(SPA)and wavelet transform coupled to MD-MCCV algorithm(WT-MD-MCCV)were applied to identify the optimal wavelengths of raw spectra including hyperspectra data,chlorophyll fluorescence spectra data and hyperspectra coupled with chlorophyll fluorescence spectra *** vector regression(SVR)was applied to build the prediction models based on preprocessed spectra feature in characteristic wavelengths coupled with different spectral *** results showed that with the increase of the concentration of dimethoate pesticide spraying,lettuce chloroplast number of osmiophilic particles increased and the starch granules ***,the intercellular space of lettuce leaves increased gradually,with the increase of dimethoate *** concentrations of pesticide residues of lettuce in the near infrared and fluorescence spectrum have a certain *** addition,the related param

关键词： lettuce chlorophyll fluorescence spectra hyperspectra modeling pesticide residue

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蔬菜穴盘苗弧形展开式自动取投苗装置设计与试验

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农业工程学报 2023年第8期39卷 54-64页

作者：韩长杰周亭尤佳徐阳毛罕平梁佳新疆农业大学机电工程学院乌鲁木齐830052 江苏大学农业工程学院镇江212013 巴州良佳农机制造有限公司焉耆841100

针对穴盘苗取投苗装置机械结构较复杂、取投苗易失败等问题,该研究设计了一种蔬菜穴盘苗弧形展开式自动取投苗装置。通过对取投苗作业过程进行分析,提出整排取苗、弧形展开投苗的自动取投苗作业方式,对夹苗组件、导向槽、旋转接苗机构... 详细信息

针对穴盘苗取投苗装置机械结构较复杂、取投苗易失败等问题,该研究设计了一种蔬菜穴盘苗弧形展开式自动取投苗装置。通过对取投苗作业过程进行分析,提出整排取苗、弧形展开投苗的自动取投苗作业方式,对夹苗组件、导向槽、旋转接苗机构等进行设计,并确定各部件关键参数,搭建PLC自动控制系统,设计执行单元的气动回路方案,并提出匹配延时函数。以辣椒穴盘苗为试验对象,以平均取投苗频率、供气压力、基质平均含水率为试验因素,以取投苗成功率、损伤率为试验指标进行正交试验,并以较优参数组合进行重复验证试验。试验结果表明:平均取投苗频率为90株/min、供气压力为0.4 MPa、基质平均含水率为30%时,取投苗成功率为94.05%,损伤率为1.19%,该研究可为自动取投苗装置的研发提供参考。

关键词：农业机械自动化蔬菜移栽取投苗装置气压驱动 PLC控制

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多维度农机多机协同技术采纳影响因素与作用机制研究

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农业机械学报 2023年第1期54卷 45-53页

作者：王博毛罕平王亚娜潘世琦江苏大学农业工程学院镇江212013 江苏大学农业装备学部镇江212013

提出了多维度与全链条农机多机协同技术,实证检验了新型农业经营主体此技术采纳的影响因素,结果表明,技术有用性、技术易用性、技术成本、吸收能力、资源就绪度、竞争压力、外部支持对技术采纳具有显著的正向影响,标准化回归系数分别为0... 详细信息

提出了多维度与全链条农机多机协同技术,实证检验了新型农业经营主体此技术采纳的影响因素,结果表明,技术有用性、技术易用性、技术成本、吸收能力、资源就绪度、竞争压力、外部支持对技术采纳具有显著的正向影响,标准化回归系数分别为0.411、0.399、0.208、0.175、0.290、0.407、0.156,技术有用性的影响最大,组织间信任对技术采纳影响不显著。组织吸收能力、外部支持在技术特性3个维度对技术采纳影响关系中均具有显著的调节效应;组织资源就绪度在技术易用性、技术成本对技术采纳的影响关系中起调节作用,在技术有用性对技术采纳的影响关系中无显著调节作用。提出了提升技术的实用化程度、推进信息化基础设施建设、强化政策支持力度、加强用户自身能力建设等对策建议。

关键词：多维度农机多机协同技术技术采纳影响因素作用机制

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自供热复合磁吸式微流控纸芯片加热层的研究

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农机化研究 2023年第6期45卷 159-164,263页

作者：刘哲毛罕平杨宁江苏大学农业工程学院江苏镇江212013 江苏大学电气信息工程学院江苏镇江212013

目前,基于酶抑制法设计的多层农残检测微流控纸芯片内置加热层以生石灰遇水放热为供热原理,放热不稳定,泄露后影响酶抑制检测反应正常进行。针对以上问题,以选择安全稳定的铁粉电氧化反应作为供热原理,设计自供热复合磁吸式微流控农残... 详细信息

目前,基于酶抑制法设计的多层农残检测微流控纸芯片内置加热层以生石灰遇水放热为供热原理,放热不稳定,泄露后影响酶抑制检测反应正常进行。针对以上问题,以选择安全稳定的铁粉电氧化反应作为供热原理,设计自供热复合磁吸式微流控农残检测纸芯片的加热层,保证酶反应时所需温度,并兼顾供热效果、成本与纸芯片体积。对加热层参数进行优化,结果表明:进水区直径为20mm,混合粉末中包含铁粉1.00g、活性炭0.10 g、NaCl0.20g,进水量为100μL;误差补偿后的相对误差为4.0%。加热层释放热量基本可以满足茶叶收获时期在室内进行酶抑制检测的温度需求,在解决纸基微流控纸芯片需外置供温设备问题的同时更加安全稳定,有利于实现自动化、便捷化农药残留检测。

关键词：农残检测酶抑制法纸基微流控芯片自供热

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电导率对温室黄瓜叶面积和干物质生产影响的动态模拟

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农业工程学报 2011年第12期27卷 105-109页

作者：倪纪恒毛罕平江苏大学现代农业装备与技术省部共建教育部重点实验室镇江212013

电导率是温室营养液管理的重要参数。为定量研究不同电导率对温室黄瓜光合与干物质生产的影响,该文以温室黄瓜为试验材料,于2009年10月至2010年7月进行了不同电导率的营养液栽培的试验,定量分析了电导率对温室黄瓜叶面积、光合速率和干... 详细信息

电导率是温室营养液管理的重要参数。为定量研究不同电导率对温室黄瓜光合与干物质生产的影响,该文以温室黄瓜为试验材料,于2009年10月至2010年7月进行了不同电导率的营养液栽培的试验,定量分析了电导率对温室黄瓜叶面积、光合速率和干物质生产的影响,构建了以辐热积为尺度的叶面积指数、最大光合速率和干物质生产模型,并用独立的试验数据对模型进行了检验。结果表明:模型对温室黄瓜叶面积、最大光合速率和干物质产量的模拟值与实测值之间的决定系数分别为0.89、0.93和0.94,回归估计标准误差分别为0.21m2/m2、1.52μmol/(m2·s)和36.77kg/hm2,预测相对误差分别为4.5%、11%和9.2%。该研究建立的模型可以为温室黄瓜的营养液管理和决策提供依据。

关键词：电导率光合动态温室叶面积指数干物质生产

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