Stalk sensor apparatus, systems, and methods

1. A method for providing improvements in agricultural science by determining yield values based on stalk-specific measurements collected by an agricultural combine harvester while traversing a field, the method comprising:

receiving, from a first stalk sensor associated with a first combine row unit of an agricultural combine harvester, a first signal that indicates a position of the first stalk sensor relative to a first stalk;

in response to receiving the first signal:

contacting the first stalk from a first side with a first feeler, the first feeler rotatably mounted to the first stalk sensor;

contacting the first stalk from a second side with a second feeler, the second feeler rotatably mounted to the first stalk sensor;

measuring a first displacement of the first feeler;

measuring a second displacement of the second feeler; and

determining a first stalk diameter based on the first displacement and the second displacement; and

generating, and displaying using a computer display device, a first yield map that depicts associations between the first stalk diameter and the position of the first stalk.

2. The method of claim 1 , further comprising:

moving a second stalk sensor associated with a second combine row unit of the agricultural combine harvester past a second stalk in the field, the second stalk sensor generating a second signal related to a position of the second stalk sensor relative to the second stalk;

storing the second signal in memory;

determining a second stalk diameter of the second stalk based on the second signal;

determining a geo-referenced position of the second stalk based on a second offset from the second stalk sensor to a global positioning receiver;

storing in memory a second association between the second stalk diameter and the geo-referenced position of the second stalk;

measuring a quantity of grain harvested by the agricultural combine harvester with a yield sensor;

determining a yield amount based on the quantity of grain;

associating the yield amount with a region of the field;

storing in memory a partial allotment of the yield amount to the region of the field based on stalk diameters, wherein the region is specified using the geo-referenced position of the first stalk; and

generating, and displaying, a second yield map associating a graphical representation of the region of the field and the partial allotment of the yield amount.

3. The method of claim 2 , further comprising:

receiving, from a second stalk sensor associated with a second combine row unit of the agricultural combine harvester, the second signal that indicates a position of the second stalk sensor relative to a second stalk;

determining stalk diameters and stalk locations based on, at least in part, the first signal and the second signal;

based on, at least in part, the stalk diameters and the stalk locations, determining at least one yield value for a region of the field;

wherein the at least one yield value are determined by correlating the stalk diameters and the stalk locations; and

generating, and displaying using a computer display device, the first yield map that depicts associations between the stalk diameters, the stalk locations and the at least one yield value.

4. The method of claim 1 , further comprising:

generating an electromagnetic field;

detecting the electromagnetic field;

intercepting the electromagnetic field with the first stalk over a time interval; and

determining a first stalk diameter based on speed of the agricultural combine harvester during the time interval or a position of the agricultural combine harvester during the time interval.

5. The method of claim 3 , further comprising:

using with a yield sensor, measuring a quantity of grain harvested by the agricultural combine harvester;

determining a yield amount based on the quantity of grain;

associating the yield amount with a region of the field;

moving the first stalk sensor past a subsequent stalk of a row unit, the first stalk sensor;

generating a subsequent signal, the subsequent signal related to a position of the first stalk sensor relative to the subsequent stalk;

storing the subsequent signal in memory;

determining a diameter of the subsequent stalk based on the subsequent signal;

associating the yield amount with the region of the field based on a first stalk diameter and a subsequent stalk diameter; and

generating, and displaying, a third yield map that provides a graphical representation of the region of the field and the at least one yield value.

6. The method of claim 5 , further comprising:

displaying harvest data on a display screen located in the agricultural combine harvester, wherein the harvest data is determined based on the first stalk diameter.

7. The method of claim 6 , wherein the harvest data includes the first stalk diameter.

8. The method of claim 6 , wherein the harvest data includes a portion of yield attributable to the row unit associated with the first stalk sensor.

9. The method of claim 6 , wherein the harvest data includes an economic loss value; and

wherein the harvest data includes a statistical variation in stalk diameters.

10. The method of claim 6 , further comprising:

associating the at least one yield value with a region of the field, wherein the at least one yield value is determined based on the stalk diameters.

11. A stalk sensor system for providing improvements in agricultural science by determining yield values based on stalk-specific measurements collected by an agricultural combine harvester while traversing a field, comprising:

a first stalk sensor;

a second stalk sensor;

a yield sensor; and

processing circuitry configured to perform:

receiving, from a first stalk sensor associated with a first combine row unit of an agricultural combine harvester, a first signal that indicates a position of the first stalk sensor relative to a first stalk;

in response to receiving the first signal:

contacting the first stalk from a first side with a first feeler, the first feeler rotatably mounted to the first stalk sensor;

contacting the first stalk from a second side with a second feeler, the second feeler rotatably mounted to the first stalk sensor;

measuring a first displacement of the first feeler;

measuring a second displacement of the second feeler; and

determining a first stalk diameter based on the first displacement and the second displacement; and

generating, and displaying using a computer display device, a first yield map that depicts associations between the first stalk diameter and the position of the first stalk.

12. The stalk sensor system of claim 11 , wherein the processing circuitry is further configured to perform:

moving a second stalk sensor associated with a second combine row unit of the agricultural combine harvester past a second stalk in the field, the second stalk sensor generating a second signal related to a position of the second stalk sensor relative to the second stalk;

storing the second signal in memory;

determining a second stalk diameter of the second stalk based on the second signal;

determining a geo-referenced position of the second stalk based on a second offset from the second stalk sensor to a global positioning receiver;

storing in memory a second association between the second stalk diameter and the geo-referenced position of the second stalk;

measuring a quantity of grain harvested by the agricultural combine harvester with a yield sensor;

determining a yield amount based on the quantity of grain;

associating the yield amount with a region of the field;

storing in memory a partial allotment of the yield amount to the region of the field based on stalk diameters, wherein the region is specified using the geo-referenced position of the first stalk; and

generating, and displaying, a second yield map associating a graphical representation of the region of the field and the partial allotment of the yield amount.

13. The stalk sensor system of claim 12 , wherein the processing circuitry is further configured to perform:

receiving, from a second stalk sensor associated with a second combine row unit of the agricultural combine harvester, the second signal that indicates a position of the second stalk sensor relative to a second stalk;

determining stalk diameters and stalk locations based on, at least in part, the first signal and the second signal;

based on, at least in part, the stalk diameters and the stalk locations, determining at least one yield value for a region of the field;

wherein the at least one yield value are determined by correlating the stalk diameters and the stalk locations; and

generating, and displaying using a computer display device, the first yield map that depicts associations between the stalk diameters, the stalk locations and the at least one yield value.

14. The stalk sensor system of claim 11 , wherein the processing circuitry is further configured to perform:

generating an electromagnetic field;

detecting the electromagnetic field;

intercepting the electromagnetic field with the first stalk over a time interval; and

determining a first stalk diameter based on speed of the agricultural combine harvester during the time interval or a position of the agricultural combine harvester during the time interval.

15. The stalk sensor system of claim 13 , wherein the processing circuitry is further configured to perform:

using with a yield sensor, measuring a quantity of grain harvested by the agricultural combine harvester;

determining a yield amount based on the quantity of grain;

associating the yield amount with a region of the field;

moving the first stalk sensor past a subsequent stalk of a row unit, the first stalk sensor;

generating a subsequent signal, the subsequent signal related to a position of the first stalk sensor relative to the subsequent stalk;

storing the subsequent signal in memory;

determining a diameter of the subsequent stalk based on the subsequent signal;

associating the yield amount with the region of the field based on a first stalk diameter and a subsequent stalk diameter; and

generating, and displaying, a third yield map that provides a graphical representation of the region of the field and the at least one yield value.

16. The stalk sensor system of claim 15 , wherein the processing circuitry is further configured to perform:

displaying harvest data on a display screen located in the agricultural combine harvester, wherein the harvest data is determined based on the first stalk diameter.

17. The stalk sensor system of claim 16 , wherein the harvest data includes the first stalk diameter.

18. The stalk sensor system of claim 16 , wherein the harvest data includes a portion of yield attributable to the row unit associated with the first stalk sensor.

19. The stalk sensor system of claim 16 , wherein the harvest data includes an economic loss value; and

wherein the harvest data includes a statistical variation in stalk diameters.

20. The stalk sensor system of claim 16 , wherein the processing circuitry is further configured to perform:

associating the at least one yield value with a region of the field, wherein the at least one yield value is determined based on the stalk diameters.