Fig. 1.
Fig. 1.

ProSpectra sensor, segregator box, and hydraulic cylinder of the grain segregator mounted on the grain bin-filling auger in the bulk tank of a Case International Harvester 1470 combine.

 


Fig. 2.
Fig. 2.

Scatter plot of the relationship between predicted grain protein concentration by the ProSpectra sensor and reference grain protein concentration by laboratory dry combustion.

 


Fig. 3.
Fig. 3.

Schematic of the mechanical portion of the grain segregator.

 


Fig. 4.
Fig. 4.

Top of the Case International Harvester 1470 combine with steel bulkhead dividing the bulk tank into a front and rear bin, vertical auger for lifting grain into the front bin, and hydraulic directional control valve.

 


Fig. 5.
Fig. 5.

Cut away diagram of the grain segregator system showing the diverter valve in the up, or “flow-through” position, so that grain discharge is to the (A) rear bin and valve in the down, or “divert” position, so that grain discharge is to the (B) front bin.

 


Fig. 6.
Fig. 6.

Fixed displacement hydraulic pump used to power the lift auger and double acting cylinder.

 


Fig. 7.
Fig. 7.

Block diagram of the electrical system consisting of yield monitor, GPS receiver, spectrometer, notebook personal computer (PC), input/output (I/O) interface, relay box, and directional control valve.

 


Fig. 8.
Fig. 8.

Maps of grain protein concentration and grain yield of dark northern spring wheat in a 20.2-ha irrigated field near Echo, OR, in 2010 and 2012.

 


Fig. 9.
Fig. 9.

Frequency distribution of on-combine sensed grain protein concentration between front and rear bins.