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A Grain Flow Model to Simulate Grain Yield Sensor Response

View Article: PubMed Central - PubMed

ABSTRACT

The objective of this study was to develop a flow model for grain combines based on the laboratory and field response of an impact based grain flow sensor. The grain flow model developed in this study is of first order with constant coefficients. A computer code was written to solve the model and to simulate the response of a yield sensor whose response had been determined previously for various types of flow rate inputs both in field and laboratory experiments. The computer program for the simulation can also compensate for the time delay. The simulation results of the theoretical model suited well to the experimental data and showed that the model effectively shows the input-output relationship of grain flow through a grain combine. This model could be used for periodic flow signals acquired from grain yield sensors. It was concluded that the model postulated in this study could be further developed to determine the grain yield entering the combine using the outlet flow rate measured by a yield sensor.

No MeSH data available.


Schematic representation of grain flow through a combine for the theoretical model.
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f1-sensors-08-00952: Schematic representation of grain flow through a combine for the theoretical model.

Mentions: It was mentioned in the previous section that first order models are practical to use while models of higher orders cause errors and noise due to the complexities of combine dynamics. In this study, another first order model was developed that could be used for grain combines. Although this model is to be used just as other first order models referred to in the previous section this postulated model differs in the way the model is derived. According to the postulated model, grain is assumed to flow into a chamber with some form of outlet port. The model is based on the system representation shown in fig. 1.


A Grain Flow Model to Simulate Grain Yield Sensor Response
Schematic representation of grain flow through a combine for the theoretical model.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3927513&req=5

f1-sensors-08-00952: Schematic representation of grain flow through a combine for the theoretical model.
Mentions: It was mentioned in the previous section that first order models are practical to use while models of higher orders cause errors and noise due to the complexities of combine dynamics. In this study, another first order model was developed that could be used for grain combines. Although this model is to be used just as other first order models referred to in the previous section this postulated model differs in the way the model is derived. According to the postulated model, grain is assumed to flow into a chamber with some form of outlet port. The model is based on the system representation shown in fig. 1.

View Article: PubMed Central - PubMed

ABSTRACT

The objective of this study was to develop a flow model for grain combines based on the laboratory and field response of an impact based grain flow sensor. The grain flow model developed in this study is of first order with constant coefficients. A computer code was written to solve the model and to simulate the response of a yield sensor whose response had been determined previously for various types of flow rate inputs both in field and laboratory experiments. The computer program for the simulation can also compensate for the time delay. The simulation results of the theoretical model suited well to the experimental data and showed that the model effectively shows the input-output relationship of grain flow through a grain combine. This model could be used for periodic flow signals acquired from grain yield sensors. It was concluded that the model postulated in this study could be further developed to determine the grain yield entering the combine using the outlet flow rate measured by a yield sensor.

No MeSH data available.