Hyperspectral imaging system for pyrometry applications and method of operating the same

Patent metadata

Field	Value
Publication number	US-9250136-B1
Application number	US-201414473210-A
Country	US
Kind code	B1
Filing date	Aug 29, 2014
Priority date	Aug 29, 2014
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

A pyrometry imaging system for monitoring a high-temperature asset which includes at least one component is provided. The system includes a lens element in optical communication with the at least one component. The lens element is configured to receive at least a portion of thermal radiation emitted from the at least one component. The system also includes a view limiting device positioned between the lens element and a dispersive element. The dispersive element is configured to split the at least a portion of thermal radiation emitted into a plurality of wavelengths. The system further includes at least one camera device in optical communication with the dispersive element. The at least one camera device is configured to receive at least one wavelength from the dispersive element.

First claim

What is claimed is:

1. A pyrometry imaging system for monitoring a high-temperature asset, which includes at least one component, said system comprising:
a lens element in optical communication with the at least one component, said lens element configured to receive at least a portion of thermal radiation emitted from a plurality of thermal points of the at least one component, wherein each thermal point of the plurality of thermal points defines a section of the at least one component;
a view limiting device in optical communication with said lens element;
a dispersive element in optical communication with said lens element through said view limiting device, said view limiting device positioned between said lens element and said dispersive element, said dispersive element configured to split the at least a portion of thermal radiation emitted into a plurality of wavelength points for each of the plurality of thermal points, wherein each wavelength point of the plurality of wavelength points represents a wavelength of the at least a portion of thermal radiation emitted from the corresponding thermal point; and
at least one camera device in optical communication with said dispersive element, said at least one camera device configured to receive at least some wavelength points of the plurality of wavelength points from said dispersive element;
at least one processor in communication with said at least one camera device, said at least one processor programmed to:
receive a stream of signals generated by said at least one camera device substantially representative of the plurality of wavelength points corresponding to each thermal point of the plurality of thermal points; and
generate a two-dimensional array based on the stream of signals, wherein a first dimension of the two-dimensional array represents the plurality of thermal points and a second dimension of the two-dimensional array represents the plurality of wavelength points corresponding to a thermal point of the plurality of thermal points.

2. The system in accordance with claim 1 , wherein said view limiting device defines a slit having a predetermined alignment with said dispersive element and said lens element, said view limiting device configured to limit the portion of thermal radiation emitted transmitted from said lens element to said dispersive element as a function of the predetermined alignment of the slit.

3. The system in accordance with claim 1 , wherein the at least one component is moving relative to said lens element.

4. The system in accordance with claim 1 further comprising a scanning optic device in optical communication with the at least one component, wherein said scanning optic device configured to:
receive the at least a portion of thermal radiation emitted from the plurality of thermal points of the at least one component, wherein the at least one component is stationary relative to said lens element; and
transmit the at least a portion of thermal radiation emitted to said lens element.

5. The system in accordance with claim 1 , wherein said at least one camera device comprises a plurality of camera devices comprising:
a first camera device configured to receive at least one wavelength point of the plurality of wavelength points corresponding to a first wavelength; and
a second camera device configured to receive at least one wavelength point of the plurality of wavelength points corresponding to a second wavelength.

6. The system in accordance claim 1 , wherein said at least one processor further programmed to determine an emissivity of the at least one of the plurality of thermal points of the at least one component at least partially based on the stream of signals.

7. The system in accordance with claim 6 , wherein said at least one processor further programmed to determine a status of a coating of the at least one of the plurality of thermal points of the at least one component based on the determined emissivity.

8. The system in accordance with claim 1 , wherein said at least one camera device further configured to receive a plurality of views of the at least one component, wherein each view comprises a different plurality of thermal points of the at least one component.

9. The system in accordance with claim 1 , wherein the high-temperature asset is a gas-turbine engine, and wherein the at least one component is at least one of a bucket, a blade, a vane, a nozzle, and a combustor.

10. A method for operating a pyrometry imaging system for monitoring a high-temperature asset which includes at least one component, said method comprising:
receiving, by a lens element, a portion of thermal radiation emitted from a plurality of thermal points of the at least one component, wherein each thermal point of the plurality of thermal points defines a section of the at least one component;
transmitting, from the lens element, the portion of thermal radiation emitted through a view limiting device to a dispersive element;
splitting, by the dispersive element, the portion of thermal radiation emitted into a plurality of wavelength points for each of the received thermal points, wherein each wavelength point of the plurality of wavelength points represents a wavelength of the portion of thermal radiation emitted from the corresponding thermal point;
transmitting, by the dispersive element, at least some wavelength points of the plurality of wavelength points to at least one camera device; and
generating, at the at least one camera device, a stream signals substantially representative of the plurality of wavelength points corresponding to each thermal point of the plurality of thermal points; and
generating a two-dimensional array based on the stream of signals, wherein a first dimension of the two-dimensional array represents the plurality of thermal points and a second dimension of the two-dimensional array represents the plurality of wavelength points corresponding to a thermal point of the plurality of thermal points.

11. The method in accordance with claim 10 , wherein the at least one view limiting device defines a slit having a predetermined alignment with the at least one dispersive element and the at least one lens element, and wherein transmitting the portion of thermal radiation emitted further comprises limiting, by the view limiting device as a function of the predetermined alignment of the slit.

12. The method in accordance with claim 10 further comprising determining, by the processor, an emissivity of the at least one of the plurality of thermal points of the at least one component at least partially based on the stream of signals.

13. The method in accordance with claim 12 further comprising determining, by the processor, a status of a coating of the at least one of the plurality of thermal points of the at least one component based on the determined emissivity.

14. A high-temperature asset defining at least one high-temperature region, said asset comprising:
at least one component positioned in the high-temperature region of said high-temperature asset; and
a pyrometry imaging system comprising:
a lens element in optical communication with said at least one component, wherein said lens element configured to receive at least a portion of thermal radiation emitted from a plurality of thermal points from said at least one component, wherein each thermal point of the plurality of thermal points defines a section of the at least one component;
a view limiting device in optical communication with said lens element;
a dispersive element in optical communication with said lens element through said view limiting device, said view limiting devic

Assignees

• Gen Electric

Inventors

• Gustavsson Jonas Patrik Richard
• Badami Vivek Venugopal
• Tralshawala Nilesh
• Estevadeordal Jordi

Classifications

• G01J2005/202

  Arrays · CPC title

• G01J5/0806

  Focusing or collimating elements, e.g. lenses or concave mirrors · CPC title

• G01J5/505

  Physics · mapped topic

• G01J5/0831

  Masks; Aperture plates; Spatial light modulators · CPC title

• G01J5/0022

  for sensing the radiation of moving bodies · CPC title