钵苗自动移栽机器人抓取指针夹持苗坨参数优化试验
设施农业里末端执行器实现钵苗夹持作业是自动移栽机的关键技术之一。为提高抓取指针夹持苗坨可靠性,进行相关取苗参数优化试验。该文设计了一种以万能试验机为基础可调节指针夹持压缩苗坨的测力平台,建立力学传递模型获取指针对苗坨的夹紧力。以黄瓜钵苗为研究对象,以指针夹持角度(指针与垂直方向成4°、7°、10°和13°)、夹持指针数(三指和四指)、苗坨含水率(65%、75%、85%和88%)、3组钵苗长势(小苗、中苗和大苗)及2种苗坨基质体积配比(泥炭∶蛭石∶珍珠岩体积比分别为6∶3∶1和7∶2∶1)为影响因素,以指针对苗坨的夹紧力为优化目标,进行单影响因素的分析试验。试验结果表明,5个因素均对夹紧力变化有...
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| Published in | 农业工程学报 Vol. 30; no. 16; pp. 8 - 16 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
农业部设施农业装备与信息化重点实验室,杭州 310058
2014
浙江大学生物系统工程与食品科学学院,杭州,310058%浙江大学生物系统工程与食品科学学院,杭州 310058 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.3969/j.issn.1002-6819.2014.16.002 |
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| Summary: | 设施农业里末端执行器实现钵苗夹持作业是自动移栽机的关键技术之一。为提高抓取指针夹持苗坨可靠性,进行相关取苗参数优化试验。该文设计了一种以万能试验机为基础可调节指针夹持压缩苗坨的测力平台,建立力学传递模型获取指针对苗坨的夹紧力。以黄瓜钵苗为研究对象,以指针夹持角度(指针与垂直方向成4°、7°、10°和13°)、夹持指针数(三指和四指)、苗坨含水率(65%、75%、85%和88%)、3组钵苗长势(小苗、中苗和大苗)及2种苗坨基质体积配比(泥炭∶蛭石∶珍珠岩体积比分别为6∶3∶1和7∶2∶1)为影响因素,以指针对苗坨的夹紧力为优化目标,进行单影响因素的分析试验。试验结果表明,5个因素均对夹紧力变化有影响;其中各因素的较优项为:指针夹持角7°、四指、苗坨84%含水率水平、长势中等以上(主茎杆或根系长分别大于30和87 mm)和基质体积配比(泥炭∶蛭石∶珍珠岩)为6∶3∶1;末端执行器在以上较优状况夹持作业时,指针向苗坨中心压缩可获得稳定上升的夹紧力,从而提高抓苗移栽可靠性。该研究为指针式末端执行器设计和适合机械移栽的钵苗农艺提出提供参考。 |
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| Bibliography: | 11-2047/S A stable end-effector in transplanting seedlings is a key technology for an automated transplanter in mechanized agriculture. The optimization parameters for gripper needles clamping seedling plugs could provide information for end-effector design and seedling plug nursery, which would be more suitable for mechanical transplanting. A seedling plug clamping platform with adjustable needles mounted on a universal tester has been designed in this study to simulate the clamping action of the needles. The vertical compression force of the universal tester was converted to horizontal compression of needles for clamping plug by mechanisms of (a) a higher pair with bearing-slope and (b) a sliding pair with a linear guideway-slider. The mechanical transmission model of the feedback force system was established for obtaining the clamping force value from the universal tester data of plug clamping operation subtracted from operation without the plug. The horizontal compression deformation value corresponding to |
| ISSN: | 1002-6819 |
| DOI: | 10.3969/j.issn.1002-6819.2014.16.002 |