Ultrasonic and GPS Measurement of Combine Swath Width

ULTRASONIC AND GPS MEASUREMENT OF COMBINE SWATH WIDTH*

K.A Sudduth, S.T. Drummond, W. Wang, M.J. Krumpelman, and C.W. Fraisse

SUMMARY

Grain yield monitoring is an important data source for precision agriculture. One of the fundamental factors limiting the accuracy of yield monitoring is the uncertainty of actual cutting width (or swath width) during the combining of drilled grain crops. We have implemented both GPS-based and ultrasonic sensing approaches to swath width measurement. The performance, advantages, and disadvantages of each approach are discussed. Results from simultaneous GPS and ultrasonic measurements are presented and compared.

* Presented as Paper No. 983096 at the 1998 ASAE International Meeting,
Orlando, Florida, 12-16 July 1998.

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