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首页> 外文期刊>Applied Engineering in Agriculture >PERFORMANCE OF PLANTER ELECTRIC-DRIVE SEED METER DURING SIMULATED PLANTING SCENARIOS
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PERFORMANCE OF PLANTER ELECTRIC-DRIVE SEED METER DURING SIMULATED PLANTING SCENARIOS

机译：播种机电动籽仪在模拟种植场景期间的性能

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摘要

Electric drive seed metering systems have become a common method for singulating row crop seed. These singulation systems have substantially fewer moving parts and can potentially respond more quickly than other drive mechanisms. However, the accuracy and response time of these systems has yet to be examined to quantify potential benefits of adoption. The objectives of this study were (1) to quantify accuracy and response time of electric meter drives to varying ground speeds and speed transitions during in-lab simulation planting operations on straight-line and curves, and (2) to compare actual seed meter motor speed to target meter speed during simulation field scenarios. To quantify metering system performance, test scenarios were developed to simulate planting on headlands, within field boundaries including traversing in-field obstacles, and planting on curves with different radii. Ground speeds during simulation scenarios were 7.2, 12.9, and 16.1 kph when operating on straight rows and 6.0, 8, 11, and 14.5 kph when planting along curvilinear paths. Test scenarios also included planter acceleration and deceleration at 0.4 and 0.6 m/s(2) when traversing in-field obstacles and tighter radii curves. Tests were conducted with two different seeding rates, 44,460 and 88,920 seeds/ha. Eight high frequency encoders were mounted on the electric meters of selected row units to record real-time meter rpm and quantify seed meter accuracy and response time. A custom DAQ system was developed to read simulation test scenario data files in ASCII text file format and send prescribed ground speed commands to the Horsch Maestro 24.30 planter's ECU at 10 Hz using a program written in LabVIEW. Results indicated that seed metering accuracy increased as ground speed increased resulting in a significantly lower seed meter rpm error at 16.1 kph under steady-state conditions. During transient states, seed meters needed 3 to 4 s to respond during deceleration and acceleration resulting to seed meter rpm error ranging from -3.7% to 3.6% at 44,460 seeds/ha seeding rate and from -3.8% to 3.2% at 88,920 seeds/ha seeding rate. During point-row operations, the response time of the meters was 0.4 s which could result in up to 10 seeds being under-planted and up to 13 seeds being over-planted per row unit. During curvilinear planting, seed meter rpm error for steady states ranged from -0.5% to 0.8% across varying turn radii resulting to seeding rate error ranging from -223 to 370 seeds/ha while during transient states seed meter rpm error varied from -7.2% to 7.9% resulting to seeding rate error ranging from -5,886 to 7,187 seeds/ha.
机译：电动驱动种子计量系统已成为单一分割行作物种子的常用方法。这些分割系统具有基本较少的移动部件，并且可能比其他驱动机构更快地响应。然而，尚未检查这些系统的准确性和响应时间以量化采用的潜在利益。本研究的目标是（1），以量化电表驱动器的精度和响应时间，以在直线和曲线实验室模拟中的实验室模拟过程中的变化接地速度和速度转换，以及（2）比较实际的种子仪表电机在仿真现场方案期间速度达到目标仪表速度。为了量化计量系统性能，开发了测试场景，以模拟岬角的种植，在现场界限内，包括穿过现场障碍，并在具有不同半径的曲线上种植曲线。在曲线路径种植时在直行行和6.0,8,11和14.5 kPh上运行时，仿真情况下的地面速度为7.2,12.9和16.1kph。测试场景还包括在横穿现场障碍物和更严格的半径曲线时在0.4和0.6 m / s（2）时的播种机加速度和减速。用两种不同的播种率，44,460和88,920种子/公顷进行测试。将八个高频编码器安装在所选行单元的电表上，以记录实时仪表RPM并量化种子表精度和响应时间。开发了一种自定义DAQ系统，以以ASCII文本文件格式读取仿真测试场景数据文件，并使用LabVIEW中编写的程序将规定的地面速度命令点发送到卷曲Maestro 24.30Plore 24.30 Planter的ECU。结果表明，随着地速增大的种子计量精度增加，在稳态条件下为16.1 kPh显着降低的种子表RPM误差。在瞬态状态期间，需要3至4秒，在减速和加速期间响应，导致种子表RPM误差从-3.7％的误差为-3.7％，以44,460种种子/公顷播种率，从-3.8％到88,920种种子/ 3.2％。/哈哈播种率。在点排运行期间，仪表的响应时间为0.4秒，这可能导致植物不到10种种子，并且每排单位被过度种植13种种子。在曲线种植过程中，稳定状态的种子表RPM误差范围为-0.5％至0.8％，变化半径，导致从-223到370种子/公顷的播种率误差，而在瞬态状态下的误差误差变化-7.2％ 7.9％，导致播种速率误差范围为-5,886至7,187种种子/公顷。

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