共查询到19条相似文献,搜索用时 109 毫秒
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目前我国蓝莓需求大但采摘作业困难,为了更好地实现机械化蓝莓采摘,根据农艺要求设计了一种振动式蓝莓采摘机.分析了蓝莓采摘机的工作原理,介绍了装置各部分的结构组成.整机进行了小型化设计,采用轴向振动的方式采摘蓝莓.在工作过程中蓝莓采摘机的采摘力可调,振动采摘子系统中增加弹簧系统,具有一定的柔性,且振动采摘子系统中的振动指棒系统在装置行进过程中能被动旋转,减少对蓝莓植株的伤害.为了验证蓝莓机工作性能,进行了采摘试验,试验结果表明蓝莓采摘机的采净率为94.9%,枝条损伤率为6.7%,叶片损伤率为4.5%,青果脱落率为6.5%,蓝莓机采摘效果较好,设计合理. 相似文献
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基于ADAMS的蓝莓采摘机构设计与仿真 总被引:1,自引:0,他引:1
《机械研究与应用》2015,(4)
为了提高国内蓝莓采摘效率,设计了一种抖动式蓝莓采摘机构。通过建立采摘机构的三维模型,进行了振动采收的理论分析,并用ADAMS进行了动力学仿真分析,探讨了偏心块转速与半径对采收质量的影响,获得了合理的参数组合。仿真结果为设计制造高效蓝莓采摘机提供了一定的理论依据。 相似文献
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针对人工逐个采摘桑葚效率低下,易伤害桑树、破坏桑果的完整性、无法自动化收集,以及桑树顶部和密集枝叶区域采摘不彻底或无法采摘等问题,提出了一种新型非接触式的采摘方法——"高压气流采摘"。并结合该采摘方法设计了一款桑葚采摘机。通过三维建模分析桑葚机出现的失效形式,应用"鱼腹梁"原理设计壳体截面为C字形,减小应力集中,从而避免失效。通过优化设计C字形壳体内板上喷头的数量和喷口位置,使得气流在壳体内形成环流振荡,实现对桑树的全方位采摘。并采用传送带作为收集机构,对吹落的桑葚进行智能化收集。 相似文献
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刘鸿宇 《机电产品开发与创新》2024,(1):54-56
针对传统人工采摘葡萄效率低、人力成本高的问题,本文设计了一款基于双目视觉定位的智能葡萄采摘机。分析人工采摘葡萄过程中的托住葡萄、剪裁葡萄柄和收集葡萄一系列动作,设计了基于可沿环形运输臂运动的袋装装置和夹持装置的葡萄托住机构、末端执行器带剪子的六自由度机械臂葡萄剪裁机构和采用滚珠丝杠原理实现葡萄分装的葡萄收集机构。利用Solidworks建立了基于双面视觉定位的智能葡萄采摘机三维模型,系统仿真了采摘机的葡萄采摘、封装、运输功能,输出目标葡萄串的运动轨迹,可实现采摘、封装和运输为一体的自动化操作;驱动机构采用市面上成熟产品具备较大安全设计余量,基于ANSYS Workbench软件对主要受力部件进行了分析校核,对结构方案设计及材料选型进行了验证分析。结果表明,该设计方案可满足使用需求,具有较强的工程实施价值,可为其他类似自动化产品设计提供参考。 相似文献
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Tone Lerher Matjaz Sraml Janez Kramberger Iztok Potrc Matej Borovinsek Blaz Zmazek 《The International Journal of Advanced Manufacturing Technology》2006,30(3-4):340-356
Multi aisle automated storage and retrieval systems correspond to multiple picking aisles served by a single storage and retrieval machine. These systems are used in practice when the need for pallet places is high and the throughput capacity is relatively low. Therefore, considerable savings of initial investment costs due to single aisle systems can be achieved using such systems. The objective of the presented study is to develop analytical travel time models for multi aisle automated storage and retrieval systems considering the operating characteristics of the storage and retrieval machine. With the proposed analytical travel time models, average travel time of the storage and retrieval machine, from which the performance of multi aisle automated storage and retrieval systems can be evaluated is determined. A simulation model of multi aisle automated storage and retrieval systems was developed to compare the performances of the proposed analytical travel time models. An example of multi aisle automated storage and retrieval systems with five picking aisles was presented for the evaluation purpose. The results show that proposed analytical travel time models perform satisfactory according to the results of simulation analysis and could be very useful tools for designing of multi aisle automated storage and retrieval systems in real-world applications. 相似文献
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The idle time which is part of the order fulfillment time is decided by the number of items in the zone; therefore the item assignment method affects the picking efficiency. Whereas previous studies only focus on the balance of number of kinds of items between different zones but not the number of items and the idle time in each zone. In this paper, an idle factor is proposed to measure the idle time exactly. The idle factor is proven to obey the same vary trend with the idle time, so the object of this problem can be simplified from minimizing idle time to minimizing idle factor. Based on this, the model of item assignment problem in synchronized zone automated order picking system is built. The model is a form of relaxation of parallel machine scheduling problem which had been proven to be NP-complete. To solve the model, a taboo search algorithm is proposed. The main idea of the algorithm is minimizing the greatest idle factor of zones with the 2-exchange algorithm. Finally, the simulation which applies the data collected from a tobacco distribution center is conducted to evaluate the performance of the algorithm. The result verifies the model and shows the algorithm can do a steady work to reduce idle time and the idle time can be reduced by 45.63% on average. This research proposed an approach to measure the idle time in synchronized zone automated order picking system. The approach can improve the picking efficiency significantly and can be seen as theoretical basis when optimizing the synchronized automated order picking systems. 相似文献
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人们在日常生活和生产过程中,广泛使用各种各样的机器,以便代替或减轻体力劳动,提高工作效率,本文主要研究的对象为红花采摘机械,分析了其研究现状,并介绍了一种手持式红花丝采摘机械的结构、原理。 相似文献
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丘陵山区谷子收获机械化的创新研究 总被引:2,自引:0,他引:2
通过对丘陵山区谷子收获机械化技术和机具现状分析,研究开发一种更适合于丘陵山区的手推电动式谷子收割机械。该新机具的研究开发可以使在丘陵山区收获谷子的劳动强度每0.067 hm2降低80%,总的收割时间比原来缩短60%,有效地解决了丘陵山区谷子收获环节的机械化问题。 相似文献
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针对异型立体化仓库(即建造在洞库内的立体化仓库)物资拣选车任务规划问题进行研究。这一类立体仓库物资拣选存在跨区域、跨巷道作业的可能,因此增加了拣选车拣选任务规划的难度。本文采用自适应遗传算法对建立的数学模型进行优化求解,避免了传统遗传算法常见的早熟收敛,解决了相对复杂情况下的异型立体化仓库物资拣选车任务规划问题。仿真结果表明,该算法所得到的规划方案逼近最优解。 相似文献