Remote high-temperature insulatorless heat-flux gauge
First Claim
1. An optically interrogated gauge for measuring heat flux incident on a surface comprising:
- a first thermographic phosphor in direct contact with said surface;
a second thermographic phosphor overlying said first thermographic phosphor;
light means incident on said first and second thermographic phosphors, for producing first luminescence from said first thermographic phosphor and second luminescence from said second thermographic phosphor;
collecting means for collecting said first and second luminesces, wherein said first luminescence and said second luminescence are indicative of the temperatures of said first and second thermographic phosphors; and
computing means connected to said collecting means for determining heat flux on said surface using numerical differences between said temperatures of said first and second thermographic phosphors.
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Abstract
A remote optical heat-flux gauge for use in extremely high temperature environments is described. This application is possible because of the use of thermographic phosphors as the sensing media, and the omission of the need for an intervening layer of insulator between phosphor layers. The gauge has no electrical leads, but is interrogated with ultraviolet or laser light. The luminescence emitted by the two phosphor layers, which is indicative of the temperature of the layers, is collected and analyzed in order to determine the heat flux incident on the surface being investigated. The two layers of thermographic phosphor must be of different materials to assure that the spectral lines collected will be distinguishable. Spatial heat-flux measurements can be made by scanning the light across the surface of the gauge.
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Citations
10 Claims
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1. An optically interrogated gauge for measuring heat flux incident on a surface comprising:
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a first thermographic phosphor in direct contact with said surface; a second thermographic phosphor overlying said first thermographic phosphor; light means incident on said first and second thermographic phosphors, for producing first luminescence from said first thermographic phosphor and second luminescence from said second thermographic phosphor; collecting means for collecting said first and second luminesces, wherein said first luminescence and said second luminescence are indicative of the temperatures of said first and second thermographic phosphors; and computing means connected to said collecting means for determining heat flux on said surface using numerical differences between said temperatures of said first and second thermographic phosphors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining heat flux incident on a surface comprising the steps of:
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depositing a first thermographic phosphor on said surface; depositing a second thermographic phosphor over said first thermographic phosphor; illuminating said second thermographic phosphor and said first thermographic phosphor with light to produce first luminescence from said first thermographic phosphor and second luminescence from said second thermographic phosphor; collecting said first and second luminescences; and computing said heat flux incident on said surface from information contained within said first and second luminescences. - View Dependent Claims (10)
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Specification