Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-06-17
1983-09-06
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358413, 364415, 364557, H04N 718
Patent
active
044032510
ABSTRACT:
A thermovision pyrometer for measuring the temperature of an object t.v. camera for focusing thermal radiation, an optical switch for alternately passing at least two spectral components of the radiation, a detector for sensing each spectral component and for generating respective video signals proportional to the density of the spectral components. The synchronizing signal of the t.v. camera controls the optical switch. The pyrometer also includes a gating circuit for generating a gating marker signal which control the position of the point of observation. The gating circuit also is controlled by the t.v. synchronizing signal. Further, the pyrometer includes a sampling circuit for sampling and measuring the amplitudes of the video signals from both the t.v. camera and the gating circuit, as well as circuitry for determining the temperature of the object based upon the ratio of the flux densities of the respective spectral components detected at the point of observation. This ratio information is transferred to a computer via an information signal transfer switch which switches the information path between the gating circuit and the raster scanning circuit to drive a character generator which displays on a t.v. monitor temperature information relative to an object under investigation. The result achieved is to minimize temperature measurement error due to nonuniformity in surface emissivity of the object or raster sensitivity of the vidicon tube used in the t.v. camera.
REFERENCES:
patent: 3798366 (1974-03-01), Hunt et al.
patent: 3806633 (1974-04-01), Coleman
patent: 3902011 (1975-08-01), Pieters et al.
patent: 3909521 (1975-09-01), Hunt et al.
patent: 4218707 (1980-08-01), Reed et al.
Direct Comparison Method; 1979; pp. 122-131; translation from Russian.
Domarenok Nikolai I.
Dostanko Anatoly P.
Kanevsky Alexei S.
Moroz Igor G.
Vasiliev Vsevolod A.
Coles Edward L.
Griffin Robert L.
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