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Open AccessTechnical Note

Embedded Micro-Controller Software Design of a Cotton Harvester Yield Monitor Calibration System

Agricultural Research Services, United States Department of Agriculture USDA, Lubbock, TX 79403, USA
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AgriEngineering 2019, 1(4), 485-495; https://doi.org/10.3390/agriengineering1040035
Received: 6 September 2019 / Revised: 27 September 2019 / Accepted: 1 October 2019 / Published: 10 October 2019
(This article belongs to the Special Issue Robotics and Automation Engineering in Agriculture)
Several yield monitors are available for use on cotton harvesters, but none are able to maintain yield measurement accuracy across cultivars and field conditions that vary spatially and/or temporally. Thus, the utility of yield monitors as tools for on-farm research is limited unless steps are taken to calibrate the systems as cultivars and conditions change. This technical note details the embedded micro-controller software system design portion of a harvester-based yield monitor calibration system for basket-type cotton strippers. The system was based upon the use of pressure sensors to measure the weight of the basket by monitoring the static pressure in the hydraulic lift cylinder circuit. To ensure accurate weighing, the system automatically lifted the basket to a target lift height, allowed the basket time to settle, and then weighed the contents of the basket. The software running the system was split into two parts, which were run on an embedded low-level micro-controller and a mobile computer located in the harvester cab. The system was field tested under commercial conditions and found to measure basket load weights within 2.5% of the reference scale. As such, the system was proven to be capable of providing an on-board auto-correction to a yield monitor for use in multi-variety field trials. View Full-Text
Keywords: yield monitor; weighing system; cotton harvesting yield monitor; weighing system; cotton harvesting
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Pelletier, M.G.; Wanjura, J.D.; Holt, G.A. Embedded Micro-Controller Software Design of a Cotton Harvester Yield Monitor Calibration System. AgriEngineering 2019, 1, 485-495.

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