检索结果-南通市图书馆

Potato seed-metering monitoring and improved miss-seeding catching-up compensation control system using spatial capacitance sensor

引用

International Journal of Agricultural and Biological Engineering 2024年第4期17卷 255-264页

作者： guanping wang Xiaoping Yang Wei Sun Yan Liu Chengjiang wang Hua Zhang Xiaolong Liu Bin Feng Hongling Li Mechanical and Electrical Engineering College Gansu Agricultural UniversityLanzhouGansu 730070China

The congenital yield reduction caused by miss-seeding in spoon-type seed-metering device of small and medium-sized potato planter is *** on the physical mechanism of different measured capacitance values between two fixed capacitor plates with different media,a miss-seeding detection scheme based on a spatial capacitance sensor is proposed first.A simple and efficient spatial capacitance sensor that can obtain as large capacitance measurement value as possible is designed,and a dual CPU coordinated seed-monitoring and compensation control system architecture is ***7745 is selected for the capacitance measure of the spatial capacitance sensor,and the code of grating encoder is also recorded at the same ***,when each potato spoon passing through the space surrounded by the capacitor plates,the maximum net capacitance fluctuation and its corresponding position can be acquired.A suitable threshold can distinguish between normal-seeding and miss-seeding ***,it should be emphasized that,this monitoring system only requires one monitoring ***,based on obtained information,an improved miss-seeding catching-up compensation plan is put *** utilizing the powerful memory capability of the CPU,this system does not need to complete compensation immediately after the miss-seeding ***,the miss-seeding information and the location of the accident can be just marked in advance,and only when the opportunity arrives,can the miss-seeding catching-up compensation be truly *** this way,the position of the seed-monitoring points can be free from restriction,and the control strategy can therefore be significantly *** soil tank test data showed that,the identification accuracy of the miss-seeding detection system was not less than 94%.When the seed-metering chain speeds are 0.2,0.3,and 0.4 m/s,the average success rates of the miss-seeding compensation system are 94.32%,83.65%,and 75.00%,respectively.T

关键词： potato planter seed-metering monitoring miss-seeding spatial capacitance sensor maximum net capacitance fluctuation improved catching-up compensation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

小型马铃薯收获机分离筛作业参数优化与试验

引用

农机化研究 2024年第10期46卷 138-144,152页

作者：冯斌王虎存王关平孙伟石林榕田斌甘肃农业大学机电工程学院兰州730070

针对小型马铃薯收获机分离筛作业参数匹配不合理导致马铃薯损伤率和破皮率较高的问题,通过对小型马铃薯收获机分离筛及马铃薯块茎进行运动学分析,确定了分离筛的关键作业参数。以马铃薯收获机分离筛线速度、分离筛倾角和振动频率为影响... 详细信息

针对小型马铃薯收获机分离筛作业参数匹配不合理导致马铃薯损伤率和破皮率较高的问题,通过对小型马铃薯收获机分离筛及马铃薯块茎进行运动学分析,确定了分离筛的关键作业参数。以马铃薯收获机分离筛线速度、分离筛倾角和振动频率为影响因素,以马铃薯伤薯率和块茎表面损伤指数作为小型马铃薯收获机作业质量评价指标,在试验台上进行了参数优化试验,建立了各指标与影响因素之间的回归数学模型,分析各因素对评价指标的交互影响规律,并对参数优化结果进行田间验证试验。研究结果表明:当分离筛面倾角为20°、分离筛线速度为1.6m/s、振动频率为8Hz时,马铃薯块茎伤薯率为1.4%,表面损伤指数为10.22,损伤综合指数和伤薯率较优化前分别降低6.93和1.8个百分点,满足马铃薯收获作业要求。研究结果可为低损小型马铃薯收获机的优化提供参考。

关键词：马铃薯收获机分离筛机械损伤参数优化

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

基于特征提取改进YOLOv3算法的马铃薯畸形识别

引用

农业装备与车辆工程 2024年第1期62卷 7-11,33页

作者：王琦王关平吴晨光张文瀚甘肃农业大学机电工程学院甘肃兰州730070

马铃薯畸形严重影响其商品价值,畸形剔除成为马铃薯产后售前的核心工作步骤之一。目前,该环节主要依靠人工目测进行,劳动消耗量大、投入成本高,精准、高效的自动检测技术亟待开发。近年来,机器视觉在物体外观及特性识别领域引起广泛关注... 详细信息

马铃薯畸形严重影响其商品价值,畸形剔除成为马铃薯产后售前的核心工作步骤之一。目前,该环节主要依靠人工目测进行,劳动消耗量大、投入成本高,精准、高效的自动检测技术亟待开发。近年来,机器视觉在物体外观及特性识别领域引起广泛关注,而马铃薯畸形属于马铃薯形态特征,故在获取马铃薯外形照片的基础上,采用改进的YOLOv3算法对马铃薯畸形进行识别。使用注意力特征金字塔替换YOLOv3算法中的特征金字塔,克服了特征融合过程中的干扰,增强网络的深层特征提取,并优化了特征表达,进而达到提升畸形检测精度、可靠性的目的。实验结果表明,改进的YOLOv3算法相比改进前精确率提升2.68%,F1精度提升2.31%,mAP提升3.34%,针对深层特征的检测能力明显增强。该算法高效、精准,为马铃薯畸形检测提供了一种更优的智能检测方法。

关键词：马铃薯畸形 YOLOv3算法注意力特征金字塔深度学习

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of the metering performance for typical shape maize seeds using DEM

引用

International Journal of Agricultural and Biological Engineering 2023年第1期16卷 26-35页

作者： Linrong Shi Wuyun Zhao Wei Sun Xiaoping Yang guanping wang Shanglong Xin College of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China

The irregular shape,varying internal compositions,and uneven distributions of maize seeds can degrade the metering performance of maize *** study investigates the effect of irregular maize on the performance of a high-filling-rate seed metering device using *** results show that the seed population in the seed box formed large and small cycles of seed transport due to the disturbances caused by the three *** increasing angular speed of the three wheels reduced the rate of seed filling in the seed filling regions by gravity and *** addition,an analysis of the repose angle formed by the dropped seed indicated that the angular speed of the taking seed wheel has a certain *** large angular speed reduced the coefficient of variation of the seed drop *** repose angle of the horse tooth seed was greater than those of the ***,the irregular maize seed can also reduce the coefficient of variation of the seed drop location.A comparison between the simulation and experiment results indicates the number of metering seed were basically the same.

关键词： maize seeds seed metering performance DEM verification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation of interaction effect between static and rolling friction of corn kernels on repose formation by DEM

引用

International Journal of Agricultural and Biological Engineering 2021年第5期14卷 238-246页

作者： Linrong Shi Xiaoping Yang Wuyun Zhao Wei Sun guanping wang Bugong Sun College of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China

The coefficient of static friction(SF),the coefficient of rolling friction(RF)for particles are two key parameters affecting the repose angle formation and flow *** this paper,the interaction effects of SF and RF on the formation process of corn repose angle was investigated by the discrete element ***,five shape kinds of corn models(horse tooth,spherical cone,spheroid,oblate,and irregular shape)were ***,aluminum cylinder and organic glass box were used to conduct the simulation experiments with taking SF and RF as independent factors and seeing the repose angle as dependent *** on simulation results the regression equations were *** results showed the relation between two factors and the rotational kinetic energy is not nonlinear,and SF does not significantly restrict the flow of corn models after increasing the flow direction,and the effect of SF on the contact number between corns and the bottom plate is remarkable,while the effect of RF on the contact number is not ***,the interaction effect of two factors on the repose angle was analyzed by variance analysis and results showed SF and RF all have a significant impact on the repose ***,their interaction effect has an impact on the repose angle.

关键词： corn kernels coefficient of static friction coefficient of rolling friction repose angle interaction influence

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design and experiment of an upper-side-discharge straw-returning and bundle self-unloading integrated corn residual film recycling machine

引用

International Journal of Agricultural and Biological Engineering 2023年第5期16卷 61-70页

作者： Xiaolong Liu Wuyun Zhao Hua Zhang guanping wang Wei Sun Fei Dai Hui Li Shanglong Xin Mechanical and Electrical Engineering College Gansu Agricultural UniversityLanzhou 730070China

Due to the arid climate,flat terrain,certain irrigation sources and high popularization of mechanical harvest in Hexi Irrigation Area of Gansu Province,the widely adopted half film-flat-mulching for corn cultivation faces serious adverse situations,such as high soil compactness,strong film-soil adhesion,significant straw stubble and thick covering accumulation on ***,a new kind of segmented combination upper-side-discharge straw-returning and bundle self-unloading integrated corn residual film recycling machine was *** scheme was characterized by small volume,low resistance,low complexity and film-impurities twice *** is constructed based on the concept of module subsection *** was composed of film surface straw cleaning device and the followed residual film recycling machine,in terms of function,any usage requirements of separate and joint operations can be *** film surface straw cleaning device is responsible for the removal of vertical corn straw and ground covering beyond the *** its stubble cutter roller obtuse-angle Lshaped blades paired single-helix arrangement is simple,it runs smoothly and the straw crushing effect is good *** layout that upper-side-discharge straw-returning cross-range screw conveyor auger is back and beyond the stubble cutter roller,eliminates the common connecting transportation mechanism between crushing and straw-returning section,so that,the system structure can be optimized and the efficiency has been significantly *** integrated residual film recycling machine is composed of triangular pyramid arc two-stage wing(TPATSW)type film lifting shovel,rod-tooth-belt type film-impurities separation device and semi-enclosed shaftless bundle film *** them,TPATSW type film lifting shovel has good corn root whisker cutting effect,low soil contact resistance and small soil congestion area,but its ability to lift film is strong,more importantly,the special seg

关键词： corn segmented combination film surface straw cleaning straw-returning TPATSW type film lifting shovel filmimpurities twice separation semi-enclosed shaftless bundle film collector self-unloading

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Realization of an integrated seeding and compensating potato planter based on one-way clutch

引用

International Journal of Agricultural and Biological Engineering 2020年第3期13卷 79-87页

作者： guanping wang Wei Sun Lea-Der Chen Hua Zhang Xiaolong Liu Hongling Li Xiaoping Yang Hao Yang Mechanical and Electrical Engineering College Gansu Agricultural UniversityLanzhou 730070GansuChina College of Science and Engineering Texas A&M University-Corpus ChristiCorpus ChristiTexas 78412USA

The yield reduction caused by miss-seeding in potato mechanized sowing is *** existing research always needs to install a spare compensator on the original seed-metering ***,problems of complex planter structure and compensated potato seed poor landing accuracy need to be solved ***,a scheme of integrated seeding and compensating potato planter based on one-way clutch is proposed in this *** on a basic‘improved one raw potato planter’and the working principle of one-way clutch,power of seed-metering system is provided through main power transmission one-way clutch by land wheels when the system works ***,when miss-seeding detection system with infrared radiation deciding that a miss-seeding incident has happened,the seed-metering power will be replaced by a compensatory motor through compensating one-way clutch at a higher ***,the idea of catching-up compensation can be *** compensation is completed,the system controller disconnects the compensatory motor,and the seed-metering power will naturally switch to the land wheels again.A prototype based on this idea was *** tests showed that the accuracy of seed monitoring system is more than 99.9%;the adoption of catching-up compensation scheme does not bring about empty spoon rate rise *** the range of 0.2-0.8 m/s of the seed-metering chain speed,although the average success compensation rate decreases evidently with the increase of the chain speed,the success compensation rate is still near 70%even at 0.8 m/s,the vast majority of missed seeds can be compensated effectively.

关键词： potato planter infrared radiation miss-seeding detection one-way clutch catching-up compensation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Potato planter test bed based on capacitive precision seed-monitoring and miss-seeding compensation system

引用

International Journal of Agricultural and Biological Engineering 2022年第6期15卷 104-112页

作者： Hua Zhang Wuyun Zhao Wei Sun guanping wang Xiaolong Liu Bin Feng Linrong Shi Yan Liu Hongling Li Mechanical and Electrical Engineering College Gansu Agricultural UniversityLanzhouGansu 730070China

Potato seed-monitoring is the premise of its precise ***,for anti-dust,anti-vibration performance and durability,the existing photoelectric monitoring schemes have obvious congenital ***,a capacitive precision seed-monitoring idea was proposed in this *** theoretical basis is that the variation of dielectric between the capacitor plates will inevitably induce the fluctuation of the detected capacitance ***,the construction of a space capacitance sensor,and the acquisition of the net capacitance fluctuation caused by the seed spoon passing through the space area of the capacitor plates,were the core focuses of this ***,the system theory and working principle were ***,a space capacitance sensor that meets all the requirements was analyzed and *** then,its spatial arrangement was described in detail,and most important of all,the technology roadmap of the net capacitance fluctuation measurement was put *** this purpose,MAX038 and GD32F407 were selected to work together to measure the *** this way,the top value of the space capacitance when a spoon passed through the space capacitance sensor was detected,at the same time,the corresponding grating encoder information was also recorded,so,the net capacitance fluctuation of this process was *** on this result,normal-seeding,miss-seeding,and multi-seeding were *** subtly,with the cooperation of the grating encoder,the position of the seed-metering monitoring point was configured *** for miss-seeding,a predictive impact compensation concept was *** on the theories above,the software core links related to seed-monitoring and compensation control were ***,a potato planter test bed based on this study was *** the Long-7 cutting potato as test samples,it was found that,the capacitance measurement error was no higher than 0.6%;no misjudgment on miss-seeding was found,however,for

关键词： potato planter capacitive precision seed-monitoring space capacitance sensor miss-seeding compensation system

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

勺链式马铃薯排种器漏播检测与补种系统的设计与试验

引用

农业工程学报 2016年第11期32卷 8-15页

作者：孙伟王关平吴建民甘肃农业大学工学院兰州730070

针对勺链式马铃薯排种器作业过程中普遍存在的漏种问题,该研究以高性能ATmega16单片机为核心,设计了由定位和测薯模块组成的漏播检测系统以及由固态继电器和电磁铁组成的速动补薯装置。定位模块主要由小磁钢和霍尔传感器构成,当携带小... 详细信息

针对勺链式马铃薯排种器作业过程中普遍存在的漏种问题,该研究以高性能ATmega16单片机为核心,设计了由定位和测薯模块组成的漏播检测系统以及由固态继电器和电磁铁组成的速动补薯装置。定位模块主要由小磁钢和霍尔传感器构成,当携带小磁钢的种勺到达霍尔传感器所在位置时,系统会立即启动由红外检测电路组成的测薯模块工作,如发生漏播,控制系统将迅速发出补薯指令,速动补薯装置将待补薯种击打至预定位置,从而实现自动补种。试验表明:排种器线速度在0.3至0.8 m/s间变化时,最终漏播率和补种率变化较小,最终漏播率<2%,补种成功率在85%以上;设计的马铃薯漏播检测及自动补种系统工作稳定,可以解决勺链式马铃薯排种器作业过程中的漏种问题。

关键词：农业机械设计马铃薯勺链式排种器漏播检测自动补偿

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于深度学习与复合字典的马铃薯病害识别方法

引用

农业机械学报 2020年第7期51卷 22-29页

作者：杨森冯全张建华孙伟王关平甘肃农业大学机电工程学院兰州730070 中国农业科学院农业信息研究所北京100081

为解决自然环境下小样本病害叶片识别率低、鲁棒性不强的问题,以马铃薯病害叶片为研究对象,提出一种基于深度卷积神经网络与复合特征字典结合的病害叶片识别方法。首先,利用迁移学习技术对Faster R-CNN模型进行训练,检测出病害叶片的斑... 详细信息

为解决自然环境下小样本病害叶片识别率低、鲁棒性不强的问题,以马铃薯病害叶片为研究对象,提出一种基于深度卷积神经网络与复合特征字典结合的病害叶片识别方法。首先,利用迁移学习技术对Faster R-CNN模型进行训练,检测出病害叶片的斑块区域;然后,采用高密度采样方法对整个斑块区域提取颜色特征和SIFT特征,建立颜色特征和SIFT特征词汇表,再由K-均值聚类算法对两类表观特征词汇表进行聚类,构造出复合特征字典;最后,将病害区域提取的特征在复合特征字典中映射后获得特征直方图,利用支持向量机训练出病害的识别模型。试验结果表明,复合特征字典中视觉单词数为50时,病害识别的鲁棒性和实时性最佳,平均识别准确率为90.83%,单帧图像耗时1.68 s;在颜色特征和SIFT特征组合下,本文方法在自然光照条件下对病害的平均识别准确率最高,达到84.16%;在相同数据集下,与传统词袋法相比,本文方法的平均识别准确率提高了25.45个百分点。

关键词：马铃薯病害识别模型自然环境 Faster R-CNN 复合字典

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：