Measurement accuracy of the area of combine-harvested field sections corresponding to a truckload of grain received at a grain elevator

Hirai Yasumaru, K. Tanaka, T. Nakanishi, T. Shikanai, Eiji Inoue, Takashi Okayasu, Mitsuoka Muneshi

研究成果: ジャーナルへの寄稿記事

抄録

Measuring the area of combine-harvested field sections corresponding to a truckload of grain received at a grain elevator (LHA: load harvest area) allows the estimation of brown rice yield. The objective of this study was to evaluate the accuracy of LHA measured based on combine movement traces when the traces were recorded by a GPS or a GPS + Quasi-Zenith Satellite System (QZSS) receiver. For the measurements using a GPS receiver, the mean and standard deviation of relative errors of LHA were 4.7% and 8.1%. The center of the relative error distribution shifted toward positive because positioning errors of a GPS receiver shifted outer edges of harvested sections outward and resulted in measuring larger harvested area than a true value. For the measurements using a GPS + QZSS receiver, the mean and standard deviation of relative errors of LHA were 0.5% and 4.8%. The center of the relative error distribution was around 0% for its better positioning accuracy. The relative errors of LHA tended to be large when an LHA was measured from a field section where only the outer-part of a field is harvested or several small harvested sections. These cases of LHA measurements increased the sum of the perimeter of harvested sections and resulted in deteriorating the measurement accuracy. This result indicated that measurement accuracy of LHA can be further improved by correcting error, which can be estimated based on positioning errors and the perimeter of harvested sections.

元の言語英語
ページ(範囲)272-281
ページ数10
ジャーナルEngineering in Agriculture, Environment and Food
10
発行部数4
DOI
出版物ステータス出版済み - 10 1 2017

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Grain elevators
grain elevators
Elevators and Escalators
Global positioning system
brown rice
Satellites
Oryza
Loads (forces)

All Science Journal Classification (ASJC) codes

  • Food Science
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

これを引用

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title = "Measurement accuracy of the area of combine-harvested field sections corresponding to a truckload of grain received at a grain elevator",
abstract = "Measuring the area of combine-harvested field sections corresponding to a truckload of grain received at a grain elevator (LHA: load harvest area) allows the estimation of brown rice yield. The objective of this study was to evaluate the accuracy of LHA measured based on combine movement traces when the traces were recorded by a GPS or a GPS + Quasi-Zenith Satellite System (QZSS) receiver. For the measurements using a GPS receiver, the mean and standard deviation of relative errors of LHA were 4.7{\%} and 8.1{\%}. The center of the relative error distribution shifted toward positive because positioning errors of a GPS receiver shifted outer edges of harvested sections outward and resulted in measuring larger harvested area than a true value. For the measurements using a GPS + QZSS receiver, the mean and standard deviation of relative errors of LHA were 0.5{\%} and 4.8{\%}. The center of the relative error distribution was around 0{\%} for its better positioning accuracy. The relative errors of LHA tended to be large when an LHA was measured from a field section where only the outer-part of a field is harvested or several small harvested sections. These cases of LHA measurements increased the sum of the perimeter of harvested sections and resulted in deteriorating the measurement accuracy. This result indicated that measurement accuracy of LHA can be further improved by correcting error, which can be estimated based on positioning errors and the perimeter of harvested sections.",
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T1 - Measurement accuracy of the area of combine-harvested field sections corresponding to a truckload of grain received at a grain elevator

AU - Yasumaru, Hirai

AU - Tanaka, K.

AU - Nakanishi, T.

AU - Shikanai, T.

AU - Inoue, Eiji

AU - Okayasu, Takashi

AU - Muneshi, Mitsuoka

PY - 2017/10/1

Y1 - 2017/10/1

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AB - Measuring the area of combine-harvested field sections corresponding to a truckload of grain received at a grain elevator (LHA: load harvest area) allows the estimation of brown rice yield. The objective of this study was to evaluate the accuracy of LHA measured based on combine movement traces when the traces were recorded by a GPS or a GPS + Quasi-Zenith Satellite System (QZSS) receiver. For the measurements using a GPS receiver, the mean and standard deviation of relative errors of LHA were 4.7% and 8.1%. The center of the relative error distribution shifted toward positive because positioning errors of a GPS receiver shifted outer edges of harvested sections outward and resulted in measuring larger harvested area than a true value. For the measurements using a GPS + QZSS receiver, the mean and standard deviation of relative errors of LHA were 0.5% and 4.8%. The center of the relative error distribution was around 0% for its better positioning accuracy. The relative errors of LHA tended to be large when an LHA was measured from a field section where only the outer-part of a field is harvested or several small harvested sections. These cases of LHA measurements increased the sum of the perimeter of harvested sections and resulted in deteriorating the measurement accuracy. This result indicated that measurement accuracy of LHA can be further improved by correcting error, which can be estimated based on positioning errors and the perimeter of harvested sections.

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