Leak detection

• US 10,234,354 B2
• Filed: 04/02/2014
• Issued: 03/19/2019
• Est. Priority Date: 03/28/2014
• Status: Active Grant

• Current Assignee: Intelliview Technologies Inc.
• Original Assignee: Intelliview Technologies Inc.
• Inventors: Badawy, Wael, Rahman, Ashiq, Rogers, Shane, Du, Shan
• Primary Examiner(s): Astacio-Oquendo, Giovanni
• Assistant Examiner(s): Russo, Raul Rios
• Application Number:
  US14/243,648
• Publication Number:
  US 20150317787A1
• Time in Patent Office: 1,812 Days
• Field of Search: 324 714, 324 7611, 324105, 324142, 32420714, 3242441, 324323, 324329, 324330, 324345, 324348, 324354, 324468, 382100, 382141, 382152
• CPC Class Codes: G01M 3/04 by detecting the presence of fluid at the leakage point
• CPC Class Codes: G01M 3/38 by using light G01M3/02 takes precedence
• CPC Class Codes: G01R 33/3802 Manufacture or installation of magnet assemblies; Additional hardware for transportation or installation of the magnet assembly or for providing mechanical support to components of the magnet assembly
• CPC Class Codes: G01R 33/3804 Additional hardware for cooling or heating of the magnet assembly, for housing a cooled or heated part of the magnet assembly or for temperature control of the magnet assembly
• CPC Class Codes: G01R 33/3806 Open magnet assemblies for improved access to the sample, e.g. C-type or U-type magnets
• CPC Class Codes: G01R 33/3808 Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only; Magnet assemblies for inside-out MR, e.g. for MR in a borehole or in a blood vessel, or magnet assemblies for fringe-field MR
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 2207/20104 Interactive definition of region of interest [ROI]
• CPC Class Codes: G06T 2207/30164 Workpiece; Machine component
• CPC Class Codes: G06T 7/0008 checking presence/absence
• CPC Class Codes: G06T 7/001 using an image reference approach
• CPC Class Codes: G06T 7/90 Determination of colour characteristics

Abstract

Apparatus and corresponding method are invented for detecting a leak in equipment forming a target, such as a stuffing box. The apparatus includes an image analyzer configured to receive an image from camera and analyze the image to determine if a leak on the equipment is present by comparing a color channel of the image with a reference and the image analyzer having an output port for delivering a notification upon the image analyzer determining that a leak is present on the equipment.

Claims

1. A method of detecting a leak in equipment forming a target, the method comprising:

acquiring a test image of the target with a camera, in which the test image comprises pixel values that are representative of color in a first color space;

sending the test image to an image analyzer;

analyzing the test image to determine if a leak is present on the equipment from the pixel values that are representative of color, by transforming the pixel values to a second color space, determining a dominant color channel of the test image as transformed into the second color space and comparing the dominant color channel of the test image as transformed to the second color space with color information from at least one reference image of the target; and

upon determining that a leak is present, generating a notification of the presence of a leak.

2. The method of claim 1 in which the second color space has a blue-yellow axis and a red-green axis.

3. The method of claim 1 in which the presence of a leak is determined by the following protocol:

the target is relatively dark when dominantly red or yellow or the target is relatively bright when dominantly green or blue.

4. The method of claim 1 in which analyzing is carried out by analysis of a region of interest in the test image.

5. The method of claim 1 in which analyzing is carried out by analysis of a segmented portion of a region of interest in the test image.

6. The method of claim 4 in which the region of interest is user selected.

7. The method of claim 1 in which analyzing comprises removing pixel values representative of glare from the test image.

8. The method of claim 1 in which analyzing comprises removing pixel values representative of snow from analysis of the test image.

9. An image analysis system comprising a camera and a server with an input port and an output port, the server being configured to carry out the method steps of claim 1.

10. Apparatus for detecting a leak in equipment forming a target, the apparatus comprising:

an image analyzer configured to receive an image from a camera, the image comprising pixel values that are representative of color in a first color space, and to analyze the image to determine if a leak on the equipment is present by transforming the pixel values to a second color space, determining a dominant color channel of the test image as transformed into the second color space and comparing the dominant color channel of the image as transformed to the second color space with color information from a reference image of the target and the image analyzer having an output port for delivering a notification upon the image analyzer determining that a leak is present on the equipment.

11. The apparatus of claim 10 further comprising a camera connected to send an image of the target to the image analyzer.

12. The apparatus of claim 10 in which the second color space has a blue-yellow axis and a red-green axis.

13. A method of detecting a liquid leak in a stuffing box, the method comprising:

acquiring a test image of the stuffing box with a camera, in which the test image comprises pixel values that are representative of color in a first color space;

sending the test image to an image analyzer;

transforming the pixel values to a second color space;

determining a dominant color channel of the test image as transformed into the second color space;

analyzing the test image to determine if a liquid leak is present on the stuffing box from pixel values of the transformed pixel values that are representative of the dominant color as transformed to the second color space; and

upon determining that a liquid leak is present, generating a notification of the presence of the leak.

14. The method of claim 13 in which analyzing the test image comprises comparing the dominant color channel of the test image with a reference.

15. The method of claim 14 in which the reference comprises color information from a reference image of the stuffing box.

16. The method of claim 13 in which the second color space has a blue-yellow axis and a red-green axis.