Plural colorants in flow tracer/debugger

• US 6,879,707 B2
• Filed: 12/05/2000
• Issued: 04/12/2005
• Est. Priority Date: 12/05/2000
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Vega, Ramon
• Primary Examiner(s): Mehta, Bhavesh M.
• Assistant Examiner(s): Tabatabai, Abolfazl
• Application Number:
  US09/733,832
• Publication Number:
  US 20020106110A1
• Time in Patent Office: 1,589 Days
• Field of Search: 382/100, 382/107, 382/154, 382/162, 382/163, 382/164, 382/165, 382/166, 382/167, 382/228, 73/12.4, 731/700.4, 731/700.7, 732/27, 734/18, 738/610.5, 738/610.7, 137/240, 137/340, 406/14, 406/30, 406/144, 356/246, 356/409
• US Class Current: 382/107
• CPC Class Codes: A61B 5/0275 using tracers, e.g. dye dilution
• CPC Class Codes: A61B 5/418 lymph vessels, ducts or nodes
• CPC Class Codes: G01P 5/001 Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation

Abstract

An array of colorant nozzles, filled with different colors, is placed at an enclosure through which fluid flow is to be analyzed. The array injects the colors into the enclosure with the flow. Color paths through the enclosure are observed and analyzed. The array best spans the enclosure two-dimensionally and injects different colors at different portions of the channel. Controlled timing of injection, e. g. in pulses, and synchronous detection—including tracking leading/trailing ends of color pulses in the enclosure—is best. Specific spatial-temporal color patterns, and 3D observations (as by plural cameras, aimed through windows or a transparent wall, or inside the disclosure) are preferred. For very large systems a careful, exact scale model is used. Preferably a programmed processor operates the array and controls analysis of resulting observed color patterns in the fluid.

Claims

1. A method for tracing or analyzing fluid flow through an enclosure;

said method comprising the steps of;

providing an array of colorant-injection elements for positioning at such enclosure;

operating the array to inject different colorants from the injection elements into the enclosure with the fluid flow; and

observing paths of the different colorants through the enclosure with the fluid flow.

2. The method of claim 1, particularly for use with fluid flow that is three-dimensional;

and wherein;

the providing step comprises providing an array that substantially spans the enclosure two-dimensionally.

3. The method of claim 1, wherein:

the providing step comprises providing elements for injection of different colorants at different portions of the enclosure cross-section.

4. The method of claim 1, wherein:

the operating step comprises controlling timing of the colorant injection; and

the observing step comprises controlling observation synchronously with the injection.

5. The method of claim 4, wherein:

the timing controlling comprises injecting the colorant in pulses; and

the observation controlling comprises tracking and analyzing movement, through the enclosure, of leading and trailing ends of the colorant pulses.

6. The method of claim 1, wherein:

the operating step comprises injecting the colorants in specific spatial-temporal color patterns; and

the observing step comprises analyzing downstream movement of the specific spatial-temporal color patterns in the fluid.

7. The method of claim 1, wherein:

the observing step comprises three-dimensional observations.

8. The method of claim 1, wherein:

the observing step comprises observing position and direction of colorants at at least one cross-section within or exit from the enclosure.

9. The method of claim 1:

further comprising the step of preparing a substantially exact model of the enclosure, at least portions of the model wall being transparent to some propagating vibration; and

wherein the observing step comprises observation through said portions, using said propagating vibration.

10. The method of claim 9, wherein:

the observing step comprises observation through the portions by plural cameras.

11. The method of claim 1:

further comprising the step of forming at least one window in the enclosure; and

wherein the observing step comprises observation through the at least one window.

12. The method of claim 1:

further comprising the step of mounting at least one camera within the enclosure; and

the observing step comprises making pictures with the at least one camera.

13. Apparatus for tracing or analyzing three-dimensional fluid flow;

said apparatus comprising;

an array of colorant-injection elements for positioning in such fluid flow with two dimensions of the array extended transversely of a flow direction; and

a programmed processor operating the array to inject different colorants from the injection elements into such fluid flow in specific spatial-temporal color patterns.

14. The apparatus of claim 13, wherein:

the specific patterns include injection of at least some of the colorants in multiple successive pulses.

15. The apparatus of claim 13, further comprising:

means for observing three-dimensional movement of the specific spatial-temporal color patterns in the fluid flow.

16. Apparatus for tracing or analyzing fluid flow in a very large or very small environment;

said apparatus comprising;

an accurate scale model of the environment, including such fluid flow;

an array of colorant-injection elements for positioning in such scale-model fluid flow with at least one dimension of the array extended transversely of a flow direction; and

a programmed processor operating the array to inject different colorants from the injection elements, into such scale-model fluid flow in specific spatial-temporal color patterns.

17. The apparatus of claim 16, particularly for use in analyzing fluid flow that is three-dimensional;

and further comprising;

means for observing three-dimensional movement of the specific spatial-temporal color patterns in the fluid flow; and

wherein the array is positioned with two dimensions of the array extended transversely of the flow direction.

18. The apparatus of claim 16, wherein:

the environment comprises a blood vessel, lymphatic duct, powerplant coolant tunnel, canal for oceangoing ships, or other very large or very small chamber.

19. The apparatus of claim 16, wherein:

the environment comprises fluid around a ship, submarine, aircraft, or other fluid craft; and

the scale model includes a scale model of the ship, submarine, aircraft, or other fluid craft.

20. The apparatus of claim 16, wherein:

the specific patterns include injection of at least some of the colorants in multiple successive pulses.