Systems, methods and apparatus for multi-row agricultural implement control and monitoring

1. A monitoring system for an agricultural implement having a plurality of row units, wherein each of the plurality of row units include:

a seed meter configured to dispense seeds;

a seed conveyor including a rotatable belt having a plurality of flights, said seed conveyor having forward side and a rearward side with respect to a forward direction of travel, said belt disposed to receive said seeds dispensed from said seed meter between said flights as said belt rotates, said flights guiding said dispensed seeds down said forward side of said seed conveyor to a lower end of said seed conveyor, whereupon said dispensed seeds are released from between said flights and exit said seed conveyor at said lower end, and wherein said flights ascend said rearward side of said seed conveyor after said dispensed seeds are released from between said flights;

the monitoring system comprising:

a first seed sensor disposed on said forward side of said seed conveyor, said first seed sensor generating a first signal corresponding to each said flight and dispensed seed descending past said first seed sensor;

a second seed sensor disposed on said rearward side of said seed conveyor, said second seed sensor generating a second signal corresponding to each said flight ascending past said second seed sensor without said dispensed seed;

a monitor having a processor, said monitor in data communication with said first seed sensor and said second seed sensor to respectively receive said generated first and second signals; and

a control module in data communication with said monitor, said seed meter, and said seed conveyor, said control module controlling a rate at which said seed meter dispenses said dispensed seeds and a rate of rotation of said belt.

2. The monitoring system of claim 1 , wherein said control module is disposed on said row unit.

3. The monitoring system of claim 1 , wherein said first seed sensor comprises an optical sensor, and wherein said second seed sensor comprises an optical sensor.

4. The monitoring system of claim 1 , wherein said monitor is configured to record a first signal generated by said first seed sensor, and wherein said monitor is configured to record a second signal generated by said second seed sensor.

5. The monitoring system of claim 4 , wherein said monitor is configured to generate a corrected signal based on said first signal and said second signal.

6. The monitoring system of claim 4 , wherein said monitor is configured to subtract from an amplitude of a portion of said first signal based on an amplitude of a portion of said second signal.

7. The monitoring system of claim 6 , wherein said monitor is configured to apply a time shift to said second signal.

8. The monitoring system of claim 7 , wherein said time shift is related to a relative position of said first seed sensor and second seed sensor and a distance between adjacent flights.

9. The monitoring system of claim 7 , wherein said time shift is related to a time between a pulse in said first signal and an immediately subsequent pulse in said second signal.

10. The monitoring system of claim 4 , wherein said first signal includes a seed pulse portion and a flight pulse portion, and wherein said monitor is configured to distinguish between said seed pulse portion and said flight pulse portion by comparing said first signal to said second signal.

11. The monitoring system of claim 10 , wherein said monitor is configured to identify said seed pulse portion based on the timing of a flight pulse in said second signal.

12. The monitoring system of claim 11 , wherein said monitor is configured to apply a time shift to said second signal.

13. The monitoring system of claim 12 , wherein said time shift is related to one of a relative position of said first seed sensor and said second seed sensor and a distance between adjacent flights and a time between a pulse in said first signal and an immediately subsequent pulse in said second signal.