共查询到20条相似文献，搜索用时 62 毫秒
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近年来,越来越多的虚拟仪器技术及相应的机械设备得到了一定的推广普及,且在工业生产、农业生产领域取得了巨大效益。为此,基于嵌入式云计算平台设计了一种车载式采棉机自动监测控制系统。以我国新疆棉花生产、采摘作为探究对象,重点介绍了安装车载监控终端如何对采棉机作业位置信息与状态数据进行实时自动采集。 相似文献
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1前言 4MZ— 2（ 3）国产自走式采棉机采用风力将采摘下的籽棉输送到棉箱。风机是风力输送系统中的关键部件。在风机的选型过程中，根据风力系统对风机的性能要求以及采棉机总体设计对风机外形尺寸的限制，在国产风机中没有合适的机型。因此研究、设计适合采棉机的配套风机很有必要。通过对国外采棉机所用风机进行研究消化、吸收改进，开发出了一种新型风机，满足了国产采棉机对风机的要求。现已通过自治区科研成果及新产品鉴定并获国家专利。 2主要结构及特点 2． 1风机结构 风机由上顶壳、侧板、支架、进口集流器、调心轴承、皮带轮、轴… 相似文献
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新疆生产建设兵团129团现有12台进口采棉机,为解决采棉机正常使用和维修问题,2008年从澳大利亚莫锐公司引进了一套采摘头的维修设备,可维修各种型号的采摘头,大大降低了采棉机的维修费用。 相似文献
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为了提高采棉机的故障自我诊断水平,实现采棉刀具磨损量的在线监测,将嵌入式图像处理系统引入到了采棉机监测系统中,有效地提高了采棉机刀具状态智能监测水平。采棉机刀具磨损监测的嵌入式图像处理系统以PC机作为核心处理器,采用图像分段增强技术,重点对刀具磨损感兴趣部分进行阈值分割,然后进行磨损面积计算,最后对刀具磨损严重的情况进行预警。为了验证采棉机刀具智能监控系统的可靠性,在棉田对采棉机监控系统进行了实地测试和功能验证。测试结果表明:利用该监测系统可以成功地测量采棉机刀具的磨损面积和磨损比率,对于大型农业智能机械装备自动化和信息化监控仪器的开发具有重要的指导意义。 相似文献
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为了提高采棉机的自主导航能力,实现采棉机路径规划的在线控制,对采棉机的智能监控系统进行了设计研究,并将多嵌入式平台引入到了智能控制系统中,采用云处理计算方式对多平台节点进行连接,实现了采棉地块视频采集和处理的实时性和智能化。为了验证智能监控系统的可靠性,在棉田对采棉机的智能监控系统进行了实地测试和功能验证。通过测试表明:该监控系统可使采棉机完成路径规划,能够高精度地完成路径在线追踪,其采净率高、落地棉率和含杂率较低,符合大型机械采棉自动化设计的需求。本次研究为云处理技术在嵌入式平台上的应用提供了有效解决方法,对于大型智能机械装备自动化和信息化监控仪器开发具有指导和借鉴意义。 相似文献
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Overland water and salt flows in a set of rice paddies 总被引：1，自引：0，他引：1
E. Playn O. Prez-Coveta A. Martínez-Cob J. Herrero P. García-Navarro B. Latorre P. Brufau J. Garcs 《Agricultural Water Management》2008,95(6):645-658
Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m−1) and an infiltration rate of 5.8 mm day−1. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day−1), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day−1 was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration. 相似文献
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车用发动机润滑油失效规律与更换周期研究 总被引：7，自引：0，他引：7
研究在正常使用条件下１０Ｗ／３０－ＱＣ级润滑油用于某型车用发动机时所表现的失效规律,确认期服从两参数Ｗｅｉｂｕｌｌ分布,并给出分布的尺度参数η和形状参数ｍ之最佳线性无偏估计（ＢＬＵＥ）同时,还为定量分析,计算车用发动机润滑油的使用可靠性和合理确定其更换周期提供了一套可供借鉴的方法,并给出了具体的计算实例。 相似文献
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赵国杰 《农业机械化与电气化》2011,(4):106-107
乡（镇）农技推广体系是农业发展的关键。介绍朝阳市农业技术推广体系的现状,针对目前体制及运行机制、服务手段等方面存在的问题,提出适合朝阳市乡（镇）农技推广体系改革与发展的对策,以期对全省农技推广体系改革和发展起到一些借鉴作用。 相似文献
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苑庆刚 《农业机械化与电气化》2010,(3):52-54
草莓果味酸甜爽口,营养价值高,为人们所喜爱的应市鲜果之一。由于草莓易受损伤和微生物侵染,因此其采收、贮藏过程极为重要。介绍草莓采收过程中的注意事项以及11种贮藏保鲜技术的实施步骤和操作方法,推介9种加工方式,为草莓产业化提供技术支持。 相似文献
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对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。 相似文献
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对《种子法》存在问题的探讨 总被引：1，自引：0，他引：1
李鹏 《农业机械化与电气化》2011,(6):129-130
《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。 相似文献
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瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。 相似文献
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在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。 相似文献
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About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered. 相似文献