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 AS  Vol.8 No.9 , September 2017
An Electro-Mechanical Controller for Adjusting Piston Pump Stroke On-the-Go for Site-Specific Application of Crop Nutrients
Abstract:
Nutrient application systems are designed to apply a relatively uniform amount of a fertilizer to agricultural fields. However, considerable variation in soil texture and other characteristics often occurs within and across production fields, which could have a major impact on fertilizer management strategies. Therefore, uniform application of a fertilizer over the entire field can be both costly and environmentally unsound. Due to their rugged and fool-proof design, crankshaft type piston pumps are widely used in agriculture. The on-the-go outlet flow of these pumps can only be varied by changing the drive shaft speed for each pump stroke setting. But only a limited range of flow rates can be achieved by changing the drive shaft speed. There is a need for an electronic controller, which can adjust the pump stroke on-the-go, for real-time, variable-rate application of crop nutrients. The Clemson “Electro-me-chanical controller for adjusting pump stroke on-the-go” was designed to replace the current manual stroke adjustment system on positive displacement piston pumps. This affordable system can be retrofitted on most John Blue - piston pumps for real-time adjustment of the pump stroke and can be controlled using pre-described position sequences (map-based) or real-time sensor commands (such as optical, pressure, and flow sensors) combined with fertilizer calculation algorithms. In addition, it can adjust pump stroke manually, using an eclectic dial from the tractor’s cab.
Cite this paper: Nafchi, A. , Mari Maja, J. , Khalilian, A. , Han, Y. , Rogers, N. , Payero, J. , Marshall, M. , Williams, P. and Fox, J. (2017) An Electro-Mechanical Controller for Adjusting Piston Pump Stroke On-the-Go for Site-Specific Application of Crop Nutrients. Agricultural Sciences, 8, 949-959. doi: 10.4236/as.2017.89069.
References

[1]   Khalilian, A., Porter, W., Henderson, W., Han, Y. and Barnes, E. (2011) Sensor Based N Management for Cotton Production in Coastal Plain Soils. Proceedings of the Beltwide Cotton Conferences, Atlanta, 4-7 January 2011, 531-537.

[2]   Manring, N.D. (1996) Displacement Control for a Variable Displacement Axial Piston Pump. Patent Number: US 5,564,905.

[3]   Gollner, W. (2005) Control Device for a Proportionally Adjustable Hydraulic Pump and a Variable Displacement Pump for a Hydrostatic Drive. Patent Number: US 6,837,046 B2.

[4]   Firth, D. and Hancock, R. (1964) Swash Plate Pumps and Motors. Patent Number: US 3,117,529.

[5]   Zimmermann, D.E. (2001) Variable Displacement Hydraulic Piston Unit With electrically Operated Variable Displacement Control and Timing Control. Patent Number: US 6,176,684 B1.

[6]   Du, H.L. (2013) Method and Apparatus for Controlling a Variable Displacement Hydraulic Pump. Patent Number: US 8,596,057 B2.

[7]   Porter, W., Khalilian, A., Henderson, W. and Han, Y. (2010) Sensor-Based Site-Specific N Management in Cotton. Proceedings of the Beltwide Cotton Conferences, New Orleans, 4-7 January 2010, 518-523.

[8]   Rogers, N.G. (2016) Sensor Based Nitrogen Management for Corn Production in Coastal Plain Soils. All Theses, Clemson University.
http://tigerprints.clemson.edu/all_theses/2579

[9]   Jones, R.K. (2003) Variable-Rate Pump. Patent Number: US 6,606,935 B2.

[10]   Khalilian, A., Han, Y.J., Maja, J.M., Marshall, M.W., Mirzakhani-Nafchi, A., Payero, J.O. and Anco, D.J. (2017) Development of GPS-Based Multi-Channel Controllers for Research Plot Pesticide Applicators. Journal of Agricultural Sciences, 8, 302-315.
https://doi.org/10.4236/as.2017.84022

 
 
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