System and method for monitoring inefficient flow rates using magnetic sensor in a liquid-flow distribution system

• US 8,839,681 B2
• Filed: 07/12/2013
• Issued: 09/23/2014
• Est. Priority Date: 10/26/2012
• Status: Active Grant

• Current Assignee: CDS-John Blue Company
• Original Assignee: CDS-John Blue Company
• Inventors: Stewart, Jason T., Thurow, Bradley R., Batcheller, David C., Allen, Robert M., Bailey, Steven S., Giese, Christopher L.
• Primary Examiner(s): Patel, Harshad R
• Application Number:
  US13/941,167
• Publication Number:
  US 20140116153A1
• Time in Patent Office: 438 Days
• Field of Search: None
• US Class Current: 73/861
• CPC Class Codes: F17D 5/00 Protection or supervision of installations arrangements for protecting foundations E02D31/00; protecting pipes from damage or internal or external wear F16L57/00, against corrosion and scale F16L58/00; investigation of the fluid-tightness of structures G01M3/00
• CPC Class Codes: G01F 1/52 by measuring the height of the fluid level due to the lifting power of the fluid flow
• CPC Class Codes: G01F 23/30 by floats

Abstract

A system and method for monitoring inefficient flow rates in a liquid-flow distribution system, such as that which is used in agricultural liquid application equipment. This may include blockages or punctures in a liquid line. The system generally includes a plurality of gauges for monitoring the supply line flow rate in a liquid application system which are monitored by a number of sensors. Immediate feedback is presented to the operator of the vehicle inside the cab. The system alerts the operator when a blockage, loss, or increase of flow rate has occurred in one of the liquid lines. The system may merely indicate that one of the lines is blocked, or the system may be more sophisticated such that it can indicate which line is blocked and adjust the flow in that line in an attempt to clear the blockage.

Claims

1. A flow rate monitoring system for use with a liquid distribution system, the monitoring system comprising:

a flow gauge including a housing through which liquid may flow, said flow gauge connected to the liquid distribution system via a liquid feed line;

an indicator located within said housing;

a sensor assembly including a sensor and affixed to an external face of said housing, said sensor adapted for detecting a status of said flow gauge comprising either blocked or not blocked;

a user interface communicating with said sensor assembly, said user interface adapted to produce an indication comprising either blocked or not blocked;

said sensor adapted for detecting the vertical location of said indicator within said housing;

said user interface adapted for indicating the vertical location of said indicator within said flow gauge housing;

wherein the vertical location of said indicator relative to said housing is dependent upon the flow rate of liquid through said housing;

a selectively adjustable liquid flow rate target for said flow gauge;

said user interface including a user interface processor adapted for actively monitoring a measured flow rate through said flow gauge;

said user interface adapted for indicating when the measured flow rate through said flow gauge diverges from said selectively adjustable liquid flow rate target;

a flow controller adapted for receiving commands from said user interface processor; and

said user interface processor is further configured to respond to a change in said measured flow rate through said flow gauge.

2. The flow rate monitoring system of claim 1, further comprising:

said sensor assembly comprising a sensor assembly housing, a gasket, a printed circuit board (PCB), and a magnetic sensor affixed to the surface of said PCB;

said indicator comprising a ferromagnetic material; and

said user interface comprising a processor adapted for receiving signals from said PCB and a graphical display indicating the vertical location of said indicator within said housing as measured by said magnetic sensor.

3. The flow rate monitoring system of claim 2, further comprising:

said indicator comprising a tail portion affixed to a spherical main body; and

said tail portion adapted for vertically aligning said indicator within said housing.

4. The flow rate monitoring system of claim 3, further comprising:

said indicator comprising at least four magnetic poles; and

wherein said four magnetic poles are oriented perpendicular to said sensor.

5. The flow rate monitoring system of claim 2, further comprising:

wherein said measured flow rate through said flow gauge exceeds said selectively adjustable flow rate; and

wherein said user interface processor instructs said flow controller to reduce said measured flow rate to said selectively adjustable flow rate.

6. The flow rate monitoring system of claim 2, further comprising:

wherein said measured flow rate through said flow gauge is below said selectively adjustable flow rate; and

wherein said user interface processor instructs said flow controller to increase said measured flow rate to said selectively adjustable flow rate.

7. The flow rate monitoring system of claim 2, further comprising:

a plurality of said flow gauges affixed together into an assembly of flow gauges, each of said flow gauges including a housing, a magnetized indicator located within said housing, and a magnetic sensor for detecting the vertical location of each said magnetized indicator within each said housing;

each of said flow gauges affixed to a separate fluid applicator by a separate liquid supply line; and

said user interface communicating with each said sensor, and adapted for indicating the vertical location of each said magnetized indicator within each said housing of each said flow gauge.

8. The flow rate monitoring system of claim 7, further comprising:

said flow gauges sharing a common liquid line feed from a liquid storage tank; and

whereby liquid flow is divided to each of said plurality of flow gauges within said common liquid line feed.

9. The flow rate monitoring system of claim 7, further comprising:

a flow divider connected to a pump and adapted for receiving liquid pumped from said storage tank by said pump;

a plurality of liquid flow lines stemming from said flow divider and each connecting to a respective flow gauge; and

wherein liquid flow is divided amongst each of said plurality of flow gauges by said flow divider.

10. The flow rate monitoring system of claim 7, further comprising a flow meter adapted to monitor the liquid flow rate between said pump and said plurality of flow gauges.

11. The flow rate monitoring system of claim 7, further comprising:

said processor of said user interface further adapted for calculating a calculated flow rate based upon the distributed flow rate for each liquid supply line from a total flow rate from said feed line; and

displaying said calculated flow rate to the user via said user interface.

12. The flow rate monitoring system of claim 1, wherein said liquid distribution system comprises an agricultural implement.

13. The flow rate monitoring system of claim 12, wherein said agricultural implement is a fertilizer sprayer.

14. The flow rate monitoring system of claim 1, wherein said housing demarcated to divide the vertical length of said housing into a number of zones.

15. A liquid distribution system comprising:

a liquid storage tank and a pump;

a flow gauge adapted to receive liquid pumped from said storage tank by said pump via at least one liquid feed line;

said flow gauge including a housing through which liquid may flow;

said flow gauge housing including an indicator located within an interior space defined by said housing, wherein a vertical location of said indicator relative to said housing is dependent upon a flow rate of liquid through said housing;

a liquid applicator connected to said flow gauge via a liquid supply line;

a sensor assembly affixed to an external face of said flow gauge housing, said sensor assembly adapted for detecting the vertical location of said indicator within said housing;

said sensor assembly comprising a housing, a gasket, a printed circuit board (PCB), and a sensor affixed to the surface of said PCB; and

a user interface communicating with said sensor, said user interface adapted for indicating the vertical location of said indicator within said flow gauge housing as measured by said sensor.

16. The liquid distribution system of claim 15, further comprising:

a selectively adjustable liquid flow rate target for said flow gauge;

a user interface including a user interface processor adapted for actively monitoring a measured flow rate through said flow gauge; and

said user interface adapted for indicating when the measured flow rate through said flow gauge diverges from said selectively adjustable liquid flow rate target.

17. The liquid distribution system of claim 15, further comprising:

a plurality of said flow gauges affixed together into an assembly of flow gauges, each of said flow gauges including a housing, a magnetized indicator located within said housing, and a magnetic sensor for detecting the vertical location of each said magnetized indicator within each said housing;

each of said flow gauges affixed to a separate fluid applicator by a separate liquid supply line and sensing a relative flow level; and

said user interface communicating with each said sensor, and adapted for indicating the vertical location of each said magnetized indicator within each said housing of each said flow gauge.

18. The liquid distribution system of claim 17, further comprising:

said flow gauges sharing a common liquid line feed from said liquid storage tank; and

whereby liquid flow is divided to each of said plurality of flow gauges within said common liquid line feed.

19. The liquid distribution system of claim 17, further comprising:

a flow divider connected to said pump and adapted for receiving liquid pumped from said storage tank by said pump;

a plurality of liquid flow lines stemming from said flow divider and each connecting to a respective flow gauge; and

wherein liquid flow is divided amongst each of said plurality of flow gauges by said flow divider.

20. The liquid distribution system of claim 17, further comprising a flow meter adapted to monitor the liquid flow rate between said pump and said plurality of flow gauges.

21. The liquid distribution system of claim 17, wherein said liquid distribution system comprises an agricultural implement.

22. The liquid distribution system of claim 21, wherein said agricultural implement is a fertilizer sprayer.

23. The liquid distribution system of claim 17, further comprising:

a user interface processor of said user interface further adapted for calculating a flow rate target for each liquid supply line based upon the total flow rate measured from said feed line and the sensed relative flow level in each liquid supply line; and

displaying said calculated flow rate value to the user via said user interface.

24. A method of monitoring the flow rate of an agricultural liquid fertilizer system including a liquid storage tank, a liquid pump, at least one feed line, and a plurality of supply lines connected to a plurality of fertilizer sprayer nozzles, the method of monitoring the flow rate comprising the steps:

connecting a respective flow gauge between each of the plurality of fertilizer sprayer nozzles and said plurality of supply lines, each said flow gauge including a housing;

connecting each of said flow gauges to said at least one feed line;

demarcating a vertical length of said housing into a number of zones;

placing an indicator comprising ferromagnetic material within each of said housings;

affixing a sensor assembly comprising a PCB and a plurality of magnetic sensors to said flow gauges, wherein each said magnetic sensor is associated with a respective indicator located within a respective housing;

electronically connecting said sensor assembly to a user interface, said user interface adapted for indicating a vertical position of each of said indicators within each of said housings to a user;

activating said pump;

pumping liquid fertilizer through said feed line and through said flow gauge housings, whereby each of said indicators are elevated to a vertical location with said housings depending upon the flow rate of said liquid fertilizer;

sensing the vertical location of each of said indicators within each of said housings with said sensor assembly;

reporting the vertical location of each of said indicators within each of said housings to said user with said user interface in real time; and

alerting the user of a change in vertical location of any of said indicators within any of said housings.

25. The method of claim 24, further comprising the steps:

selecting an adjustable base liquid flow rate target for said flow gauge;

actively monitoring a measured flow rate through said flow gauge with an interface processor;

indicating when the measured flow rate through said flow gauge differs from said adjustable base liquid flow rate target; and

alerting said user to said divergence of flow rate.

26. The method of claim 24, further comprising the steps:

calculating a distributed flow rate for each liquid supply line from a total flow rate from said feed line; and

indicating said calculated flow rate to said user via said user interface.