US5225883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video temperature monitor
Assignee: Babcock and Wilcox Power Generation Group Inc
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Filing: 1991-06-05
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Granted: 1993-07-06
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Expires: 2011-06-05
Abstract
Abstract An apparatus and method for providing a real-time video display and a temperature map display of an object, in particular a flame, comprises a single CCD video camera and optical equipment which focuses separate light bundles onto a photosensitive surface of the camera. A separate band pass filter is used in each light bundle to filter selected different wavelengths of light. The video signal from the camera is used in a video digitizer to obtain data which can be used to calculate a temperature map based on the different wavelengths of light of the two bundles. The video signal is also used to produce a real-time video display of the object.
Inventors
- 👤 Hudson R. Carter
- 👤 John W. Berthold
- 👤 Charles C. England
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:11
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/60; G01J5/602; F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/085; G01J5/0014; G01J5/0018; G08; G08B; G08B17/00; G08B17/12; G08B17/125; F23N2229/00; F23N2229/20; G01J1/00; G01J1/42; G01J1/44; G01J2001/4446; G01J2001/448; G01J2005/0077
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
229 words
An apparatus for providing a real-time display and temperature map of an object, comprising: a single CCD video camera having a photosensitive surface; dividing means for dividing a bundle of light from the object into two light bundles; filter means for only passing a different selected wavelength of light from each divided light bundle with all other wavelengths being absorbed or reflected; optical means for focussing the two selected wavelengths of light passed from the divided light bundles onto the photosensitive surface of the single CCD video camera, the video camera producing a video signal therefrom; pathlength compensation means in one of the divided light bundles for adjusting an optical pathlength of the one divided light bundle to be substantially equal to an optical pathlength of the other divided light bundle; a video digitizer connected to said camera for digitizing the video signal into a digitized signal; a first video display connected to the video digitizer for producing a real-time display of the two selected wavelengths of light passed from the divided light bundles; processing means connected to said digitizer for processing the digitized signal to form temperature map data calculated from relative intensities of the two selected wavelengths of light passed from the divided light bundles; and a second video display connected to said processing means for providing a temperature map display corresponding to the temperature map data.
Claim 2
Independent Claim
229 words
An apparatus for providing a real-time display and temperature map of an object, comprising: a single CCD video camera having a photosensitive surface; dividing means for dividing a bundle of light from the object into two light bundles; filter means for only passing a different selected wavelength of light from each divided light bundle with all other wavelengths being absorbed or reflected; optical means for focussing the two selected wavelengths of light passed from the divided light bundles onto the photosensitive surface of the single CCD video camera, the video camera producing a video signal therefrom; pathlength compensation means in one of the divided light bundles for adjusting an optical pathlength of the one divided light bundle to be substantially equal to an optical pathlength of the other divided light bundle; a video digitizer connected to said camera for digitizing the video signal into a digitized signal; a first video display connected to the video digitizer for producing a real-time display of the two selected wavelengths of light passed from the divided light bundles; processing means connected to said digitizer for processing the digitized signal to form temperature map data calculated from relative intensities of the two selected wavelengths of light passed from the divided light bundles; and a second video display connected to said processing means for providing a temperature map display corresponding to the temperature map data.
Claim 3
Dependent Claim
25 words
An apparatus according to claim 1, wherein said filter means includes a separate bandpass filter in the path of each of said divided light bundles.
Claim 4
Dependent Claim
39 words
An apparatus according to claim 1, including a neutral density filter in the path of one of the divided light bundles having highest intensity for equalizing the intensity of both divided light bundles before they reach the video camera.
Claim 5
Dependent Claim
23 words
An apparatus according to claim 1, wherein the optical means focuses the two divided light bundles onto separate locations on the photosensitive surface.
Claim 6
Independent Claim
165 words
A method of forming a real-time display and temperature map of an object, comprising: splitting a light bundle from the object into two divided light bundles; passing a different selected wavelength of light from each divided light bundle with all other wavelengths being absorbed or reflected; focussing the two selected and different wavelengths of light passed from the divided light bundles onto a photosensitive surface of a single CCD video camera to produce a video signal; adjusting an optical pathlength of the one divided light bundle to be substantially equal to an optical pathlength of the other divided light bundle with pathlength compensation means; digitizing the video signal; using the video signal to form a first video display of a real-time display of the two selected and different wavelengths of light passed from the divided light bundles; calculating from the digitized video signal a temperature map of the object; and displaying the temperature map on a second video display corresponding to the temperature map data.
Claim 7
Independent Claim
165 words
A method of forming a real-time display and temperature map of an object, comprising: splitting a light bundle from the object into two divided light bundles; passing a different selected wavelength of light from each divided light bundle with all other wavelengths being absorbed or reflected; focussing the two selected and different wavelengths of light passed from the divided light bundles onto a photosensitive surface of a single CCD video camera to produce a video signal; adjusting an optical pathlength of the one divided light bundle to be substantially equal to an optical pathlength of the other divided light bundle with pathlength compensation means; digitizing the video signal; using the video signal to form a first video display of a real-time display of the two selected and different wavelengths of light passed from the divided light bundles; calculating from the digitized video signal a temperature map of the object; and displaying the temperature map on a second video display corresponding to the temperature map data.
Claim 8
Dependent Claim
58 words
A method according to claim 5, including dividing the bundle of light coming from the object using a beam splitter to form two divided light bundles and using a mirror to divert one of the divided light bundles so that it extends in a path which is substantially parallel to the path of the other divided light bundle.
Claim 9
Dependent Claim
20 words
A method according to claim 6, including focussing the parallel divided light bundles onto separate locations of the photosensitive surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |