Method of determining the location of tip timing sensors during operation

Patent metadata

Field	Value
Publication number	US-9530209-B2
Application number	US-201414155606-A
Country	US
Kind code	B2
Filing date	Jan 15, 2014
Priority date	Jan 15, 2014
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A combination probe is positioned at a location in a stationary portion of a turbo machine that defines a gas flow path and is configured to detect a moving portion of the turbo machine within the gas flow path. The combination probe includes a tip timing sensor configured to sense when the moving portion is located proximate to the location of the probe, and an optical component configured to have a field of view that includes the moving portion when the moving portion is located proximate to the location of the probe. There is also an image capture device coupled to the optical component to capture an image of the field of view. The image can be used to determine the particular blade tip location within the field of view which is also the blade tip location sensed by the tip timing sensor.

First claim

What is claimed is:

1. An image analysis system comprising:
a probe positioned at a location in a stationary portion of a turbo machine that defines a gas flow path and configured to detect a blade tip of a blade of the turbo machine within the gas flow path, the probe comprising:
a tip timing sensor configured to sense when the moving portion is located proximate to the location of the probe within a detection region that intersects the blade tip, and
an optical component configured to have a field of view that intersects the detection region, the field of view including the blade tip when blade tip is located proximate to the location of the probe; and
an image capture device coupled to the optical component to capture an optical image of the field of view to optically determine a characteristic of the blade tip that varies in relation to movement of the blade tip relative to the optical component.

2. The image analysis system of claim 1 , wherein the image capture device comprises a camera configured to capture images at a rate of about 30,000 to 50,000 frames per second.

3. The image analysis system of claim 1 , comprising:
an image analyzer configured to automatically determine a blade tip width in the optical image.

4. The image analysis system of claim 1 , comprising:
an image analyzer configured to automatically determine a blade tip angle in the optical image.

5. The image analysis system of claim 1 , comprising:
an image analyzer configured to automatically determine a blade tip width in the optical image;
the image analyzer further configured to automatically determine a blade tip angle in the optical image; and
the image analyzer further configured to determine a blade tip location of the field of view based on the blade tip width and blade tip angle determined from the optical image.

6. The image analysis system of claim 1 , wherein the image capture device is configured to capture a series of optical images of the blade tip.

7. The image analysis system of claim 6 , wherein the series of optical images is captured during transient operating conditions of the turbo machine.

8. A method using a probe positioned at a location in a stationary portion of a turbo machine that defines a gas flow path and configured to detect a blade tip of a blade of the turbo machine within the gas flow path, the method comprising:
sensing, using a tip timing sensor of the probe, when the blade tip is located proximate to the location of the probe within a detection region that intersects the blade tip, and
sensing, using an optical component of the probe, a field of view that intersects the detection region, the field of view including the blade tip when the blade tip is located proximate to the location of the probe; and
capturing, using an image capture device coupled to the optical component, an optical image of the field of view to optically determine a characteristic of the blade tip that varies in relation to movement of the blade tip relative to the optical component.

9. The method of claim 8 , wherein the image capture device comprises a camera configured to capture images at a rate of about 30,000 to 50,000 frames per second.

10. The method of claim 8 , comprising:
analyzing the optical image to automatically determine a blade tip width in the optical image.

11. The method of claim 8 , comprising:
analyzing the optical image to automatically determine a blade tip angle in the optical image.

12. The method of claim 8 , comprising:
analyzing the optical image to:
automatically determine a blade tip width in the optical image;
automatically determine a blade tip angle in the optical image; and
determine a blade tip location of the field of view based on the blade tip width and blade tip angle.

13. The method of claim 8 , wherein the image capture device is configured to capture a series of optical images of the blade tip.

14. The method of claim 8 , wherein the series of optical images is captured during transient operating conditions of the turbo machine.

15. A method using a probe positioned at a location in a stationary portion of a turbo machine that defines a gas flow path and configured to detect a blade tip of a blade of the turbo machine within the gas flow path, the method comprising:
sensing, using a tip timing sensor of the probe, when the blade tip is located proximate to the location of the probe, and
sensing, using an optical component of the probe, a field of view that includes the blade tip when the blade tip is located proximate to the location of the probe;
capturing, using an image capture device coupled to the optical component, an optical image of the field of view; and
analyzing the optical image to:
automatically determining a blade tip width in the optical image; and
automatically determining a blade tip angle in the optical image;
analyzing timing data obtained using the tip timing sensor and data obtained from determination of the blade tip width and determination of the blade tip angle to determine vibratory response characteristics of the blade.

16. The method of claim 15 , including determining a blade tip location of the field of view based on the blade tip width and blade tip angle.

Assignees

• Siemens Energy Inc

Inventors

• Hatcher Jr Clifford
• Brindisi Joseph M

Classifications

• G01B11/16

  for measuring the deformation in a solid, e.g. optical strain gauge · CPC title

• G06T7/004 Primary

  Physics · mapped topic

• G01H9/004

  using fibre optic sensors (light guides per se G02B6/00, acousto-optical devices specially adapted for gating or modulating in optical wave guides G02F1/125) · CPC title

• F01D21/003

  Arrangements for testing or measuring (for measuring vibrations G01H) · CPC title

• H04N7/18 Primary

  Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast · CPC title