Construction of a selective Head-forming Vegetables Harvester with a Microcomputer Controlled Sensor

微机控制传感器选择性头部成型蔬菜收获机的构造

• 批准号: 58860039
• 负责人: YUKUEDA Makoto
• 金额: $ 2.5万
• 依托单位: 富山県立大谷短期大学
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1983
• 资助国家: 日本
• 起止时间: 1983 至 1985
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-58860039/
• 关键词: sensor with microcomputer; mechanical lettuce harvester; 選択収穫

An experimental selective harvester for lettuce was constructed. It equipped with a selector which detected maturity and size of lettuce heads and a microcomputer which processed the selector output signals. The harvester consisted of a detector, a microcomputer and a knife driven by a hydraulic system. These elements were all mounted on a subframe and it was mounted on the three-point linkage of the smaller four-wheel drive tractor. This harvester could select and cut lettuce heads of single-row, and its travelling speed was 0.1 meter per second.Two types of detectors were developed. One was that of mechanically compression and the other was of electro-static capacity measurement.The mechanical detector had compression and selection rollers between which lettuces passed. The first action of detection was that the compresion rollers which were loaded by a spiral spring compressed the surrounding leaves of lettuce against the head and gaged size of the lettuce head. The second action wa … More s that the selection rollers which was loaded by a helical spring compressed the lettuce head and measured firmness of the head. On the other hand the dielectric detector had a couple of electrode plates to which high-frequency voltage applied. Apparent density of lettuce head could be measured as output signals of the detector.As a result of field tests on selective harvesting of lettuces, the experimental selective harvester operated satisfactorily. However, performance of the harvester almost depended on that of the detector. In case of the mechanical detector stronger correlation was observed between the measured size of lettuce and the diameter of the head, and fairly good correlation between the measured firmness and the apparent density of the head. In case of the dielectric detector selection accuracy was influenced significantly by the shape of electrode plates, and the electrode of curved plates fitted to the curvature of the lettuce head detected much accurately than that of flat plates. Less

建立了生菜选择性收获机的试验装置。它配备了一个检测生菜结球成熟度和大小的选择器和一个处理选择器输出信号的微型计算机。该收割机由探测器、微型计算机和由液压系统驱动的刀具组成。这些部件都安装在一个副车架上，并安装在较小的四轮驱动拖拉机的三点连杆上。该收割机可实现对单行生菜头的分拣和切割，运行速度为0.1m/s。一种是机械压缩，另一种是静电容量测量，机械检测仪有压缩辊和选择辊，生菜在这些辊之间通过。检测的第一个动作是由螺旋弹簧加载的压缩辊将周围的生菜叶片压在生菜头上，并测量生菜头的尺寸。第二个动作是Wa…更多的S说，用螺旋弹簧装载的分选辊对生菜头部进行压缩，并测量了头部的坚固性。另一方面，介电探测器有几个电极板，施加高频电压。该采收机可测量生菜头表观密度作为探测器的输出信号，经田间采收试验表明，该采收机性能良好。然而，收割机的性能几乎取决于检测器的性能。在机械探测仪的情况下，测量的生菜大小与菜头直径之间有较强的相关性，测得的坚实度与菜头的表观密度之间有较好的相关性。对于介质探测器，电极板的形状对选择精度有很大影响，与莴笋头的曲率相适应的曲线板电极的检测精度远高于平板电极。较少

项目成果

農業機械学会年次大会講演要旨45回. (1986)

日本农业机械学会第 45 届年会摘要（1986 年）。

農業機械学会年次大会講演要旨44回. (1985)

第44届日本农业机械学会年会摘要（1985年）

Preliminarily Notes of Jap. Soc. of Agric. Machinery. No.44. (1985)

日本的初步注释。

Preliminarily Notes of Jap. Soc. of Agric. Machinery. No.45. (1986)

日本的初步注释。