Systems and methods for fluid dispensing

• US 8,074,585 B2
• Filed: 05/01/2008
• Issued: 12/13/2011
• Est. Priority Date: 04/24/2003
• Status: Active Grant

• Current Assignee: University of Tennessee Research Foundation (University of Teesside)
• Original Assignee: University of Tennessee Research Foundation (University of Teesside)
• Inventors: Wilkerson, John B., Hancock, John H., Moody, Fred H., Newman, Melvin A.
• Primary Examiner(s): Novosad, Christopher J.
• Application Number:
  US12/150,772
• Publication Number:
  US 20080202398A1
• Time in Patent Office: 1,321 Days
• Field of Search: 111/118, 111/119, 111/127, 111/129, 111/900, 111/903, 111/904, 239/1, 239 61- 64, 239 67- 73, 239/650, 239/99, 239662-664, 239/146, 239/172, 239/722, 239/289, 222/1, 222/14, 222/52, 222/56, 222/57, 222/638, 222/639, 222/644, 222/650, 222/71, 222/129, 222/160, 222/192
• US Class Current: 111/127
• CPC Class Codes: A01C 1/06 Coating or dressing seed
• CPC Class Codes: A01C 7/06 Seeders combined with fertilising apparatus
• CPC Class Codes: A01C 7/105 Seed sensors
• CPC Class Codes: Y10S 111/90 Methods of planting seeds and miscellaneous compositions
• CPC Class Codes: Y10S 111/904 Population control function

Abstract

Systems and methods are disclosed for dispensing fluids. The systems can include a sensor operable to detect when an object passes a first location as the object moves to a second location. The systems can also include a fluid dispenser operable to dispense fluid at the second location. In addition, the systems can include a control unit in communication with the sensor and the fluid dispenser. The control unit can receive information from the sensor that the object has passed the first location and to control the fluid dispenser to dispense fluid at the second location at a predetermined time after the object passes the first location.

Claims

1. A fluid dispensing system, comprising:

(a) a sensor positioned on a tube, the tube positioned to transmit an object by gravity through the tube and out of an output end of the tube, and the sensor configured to detect when the object passes a first location within the tube as the object drops to a second location outside of the tube;

(b) a fluid dispenser configured to dispense fluid at the second location; and

(c) a control unit in communication with the sensor and the fluid dispenser, the control unit being configured to receive information from the sensor that the object has passed the first location and to control the fluid dispenser to dispense fluid at the second location at a predetermined time after the object passes the first location.

2. The system of claim 1 wherein the sensor is an optical sensor.

3. The system of claim 1 wherein the predetermined time comprises a calculation by the control unit of a predicted time for arrival by the object at the second location.

4. The system of claim 3 wherein the predicted time for arrival by the object at the second location comprises a calculation of an average object travel time from the first location to the second location.

5. The system of claim 1 wherein the fluid dispenser is operable for dispensing a predetermined amount of fluid at the second location.

6. The system of claim 1 wherein the sensor is operable to detect when a plurality of objects sequentially pass the first location, and wherein the control unit is operable to cause the fluid dispenser to dispense fluid at the second location at a predetermined time for each object.

7. The system of claim 6 wherein the control unit is operable to track the plurality of objects and control the fluid dispenser to dispense fluid associated with each of the objects at the second location at the predetermined time after each of the objects pass the first location.

8. The system of claim 1 wherein the control unit comprises a shift register and a clock, wherein the shift register includes n bits that can shift according to a clock cycle of the clock for indicating when the predetermined time has elapsed, and wherein the predetermined time is equivalent to the clock cycle multiplied by n.

9. The system of claim 8 wherein the shift register comprises an input and an output bit, wherein the input bit shifts towards the output bit, and wherein the input bit is set to a predetermined bit when the sensor detects that the first object passes the first location, and wherein the predetermined time has elapsed when the predetermined bit shifts to the output bit.

10. The system of claim 9 wherein the fluid dispenser is connected to the output bit and can dispense fluid when the predetermined bit shifts to the output bit.

11. The system of claim 1 wherein the control unit comprises a programmable controller for determining the predetermined time.

12. The system of claim 1 wherein the control unit is operable to indicate that the predetermined time has elapsed after the first object has reached the second location.

13. The system of claim 1 further comprising a user interface in communication with the control unit for controlling the predetermined time.

14. The system of claim 1 further comprising a second sensor positioned at the output end of the tube to detect when an object passes the output of the tube, the second sensor in communication with the control unit for controlling the predetermined time.

15. The system of claim 1 further comprising a ground speed sensor in communication with the control unit for monitoring the ground speed of the system.

16. The system of claim 15 wherein the ground speed sensor comprises radar.