System and method for sensing and controlling beverage quality

• US 6,374,845 B1
• Filed: 04/14/2000
• Issued: 04/23/2002
• Est. Priority Date: 05/03/1999
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Elkind, Jerome L., Carr, Richard A., Melendez, Jose L.
• Primary Examiner(s): Hepperle, Stephen M.
• Application Number:
  US09/549,287
• Time in Patent Office: 739 Days
• Field of Search: 137/3, 137/7, 137/9, 137/93, 137/88
• US Class Current: 137/3
• CPC Class Codes: G01N 21/43 by measuring critical angle
• CPC Class Codes: G01N 21/553 and using surface plasmons fluorescence excitation G01N21/648; enhanced Raman G01N21/658
• CPC Class Codes: Y10T 137/0329 Mixing of plural fluids of diverse characteristics or conditions
• CPC Class Codes: Y10T 137/0363 For producing proportionate flow
• CPC Class Codes: Y10T 137/2509 By optical or chemical property

Abstract

Disclosed is a method of automatically sensing and controlling beverage quality for soft drinks from a fountain dispenser, for example, comprising the steps of supplying a first fluid, such as water or carbonated water, wherein the flow of the first fluid is controlled by a first valve, supplying a second fluid, mixing the first fluid and the second fluid, passing a sample of the mixture of the first fluid and the second fluid onto a sensing surface of a fixed optic sensor, measuring one or more properties of the sample, such as, for example, refractive index, temperature, and pressure, controlling the first valve based on the one or more properties, and dispensing the mixture. The first valve may be proportionally enlarged and reduced or it may selectively opened and closed pursuant to a desired duty cycle. The present invention further comprises a system for automatically sensing and controlling beverage quality, comprising a controller means, a first valve electrically coupled to the controller means for controlling supply of a first fluid, a second valve electrically coupled to the controller means for controlling supply of a second fluid, and a fixed optic sensor electrically coupled to the controller means.

Claims

1. A method of automatically sensing and controlling beverage quality, comprising the steps of:

supplying a first beverage fluid, wherein the flow of said first beverage fluid is controlled by a first valve;

supplying a second beverage fluid;

mixing said first beverage fluid and said second beverage fluid;

passing a sample of the mixture of said first beverage fluid and said second beverage fluid onto a sensing surface of a fixed optic sensor;

measuring one or more properties of said sample;

controlling said first valve based on said one or more properties to maintain a precise and predetermined fixed ratio of the beverage fluids as the one or more properties change; and

dispensing said mixture.

2. The method as recited in claim 1 wherein said fixed optic sensor is a surface plasmon resonance sensor.

3. The method as recited in claim 1 wherein said fixed optic sensor is a refractometer.

4. The method as recited in claim 1 wherein said one or more properties comprises refractive index.

5. The method as recited in claim 1 further comprising the step of passing a sample of the mixture of said first fluid and said second fluid over a temperature sensor such that said one or more properties comprises temperature.

6. The method as recited in claim 1 further comprising the step of passing a sample of the mixture of said first fluid and said second fluid over a pressure sensor such that said one or more properties comprises pressure.

7. The method as recited in claim 1 wherein said first fluid comprises water.

8. The method as recited in claim 1 wherein said second fluid comprises a concentrated flavored syrup.

9. The method as recited in claim 1 wherein the diameter of said first valve is variably increased and decreased.

10. The method as recited in claim 1 wherein said first valve is selectively opened and closed according to a prescribed first duty cycle.

11. The method as recited in claim 10 further comprising the step of adjusting said first duty cycle.

12. The method as recited in claim 1 wherein the flow of said second fluid is controlled by a second valve.

13. The method as recited in claim 1 further comprising the step of triggering an alarm based on said one or more properties.

14. The method as recited in claim 1 further comprising the step of transmitting one or more data elements related to said one or more properties to a local data storage medium.

15. The method as recited in claim 1 further comprising the step of transmitting one or more data elements related to said one or more properties to a remote data storage medium.

16. The method as recited in claim 1 further comprising the step of determining when the supplying of said second fluid has ceased due to depletion of said second fluid.

17. The method as recited in claim 16 further comprising the step of supplying a third fluid substantially similar to said second fluid.

18. The method as recited in claim 1 further comprising the step of cleansing said sensing surface of said fixed optic sensor.

19. The method as recited in claim 1 wherein said fixed optic sensor comprises:

a light source;

a sensing surface disposed at an angle to receive at least one light ray emitted from said light source; and

a photodetector for measuring intensity of a reflected component of said at least one light ray.

20. A system for automatically sensing and controlling beverage quality, comprising:

a controller means;

a first valve electrically coupled to said controller means for controlling supply of a first beverage fluid;

a second valve electrically coupled to said controller means for controlling supply of a second beverage fluid; and

a fixed optic sensor electrically coupled to said controller means, wherein the fixed optic sensor is operative to sense one or more properties associated with the first and second beverage fluids and cause the controller means to control said first valve and said second valve based on said one or more properties to maintain a precise and predetermined fixed ratio of the beverage fluids as the one or more properties change.

21. The system as recited in claim 20 wherein said fixed optic sensor is a surface plasmon resonance sensor.

22. The system as recited in claim 20 wherein said fixed optic sensor is a refractometer.

23. The system as recited in claim 20 wherein said controller means is a digital signal processing unit.

24. The system as recited in claim 20 wherein said controller means is a microcontroller.

25. The system as recited in claim 20 wherein said first valve is selectively opened and closed according to a prescribed first duty cycle.

26. The system as recited in claim 20 wherein said second valve is selectively opened and closed according to a prescribed second duty cycle.

27. The system as recited in claim 20 wherein the diameter of said first valve is variably increased and decreased.

28. The system as recited in claim 20 wherein said second valve is variably increased and decreased.

29. The system as recited in claim 20 further comprising an alarm device electrically connected to said controller means.

30. The system as recited in claim 20 further comprising a third valve electrically coupled to said controller means for controlling supply of a third fluid.

31. The system as recited in claim 20 further comprising a variable input electrically coupled to said controller means.

32. The system as recited in claim 20 further comprising a local data storage medium electrically coupled to said controller means.

33. The system as recited in claim 20 further comprising a remote data storage medium for receiving one or more data elements transmitted from said controller means unit via a network.

34. The system as recited in claim 20 wherein said fixed optic sensor comprises:

a light source;

a sensing surface disposed at an angle to receive at least one light ray emitted from said light source; and

a photodetector for measuring intensity of a reflected component of said at least one light ray.

35. A system for automatically monitoring and improving beverage quality, comprising:

a controller means;

a first valve electrically coupled to said controller means for controlling supply of a first beverage fluid;

a second valve electrically coupled to said controller means for controlling supply of a second beverage fluid; and

a fixed optic sensor coupled to said controller means;

an alarm device electrically connected to said controller means;

a variable input electrically coupled to said controller means;

a local data storage medium electrically coupled to said controller means; and

a remote data storage medium for receiving one or more data elements transmitted from said controller means via a network, wherein the fixed optic sensor is operative to sense one or more properties associated with the first and second beverage fluids and cause the controller means to control said first valve and said second valve based on said one or more properties to maintain a precise and predetermined fixed ratio of the beverage fluids as the one or more properties change.