Infrared thermocouple improvements

Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

374127, 374128, G01J 500

Patent

active

057646848

ABSTRACT:
The output stability of an infrared thermocouple is improved by filtering the radiation received by the infrared thermocouple to pass only short wavelengths. The stability is further increased by providing a second infrared thermocouple having its input filtered to pass long wavelengths. The two outputs are combined to obtain an output signal which is substantially independent of emissivity. The linear range of an infrared detector through which its output closely follows that of a linear thermocouple is increased by a calibration method in which an initial offset is provided to a readout device. Calibration of the infrared detector is completed using an adjustable potentiometer. By providing removable apertures, the temperature range through which an infrared thermocouple may be used is extended. Elongated targets are efficiently viewed by an infrared thermocouple having an elongated thermopile flake and an imaging lens.

REFERENCES:
patent: 2658390 (1953-11-01), Machler
patent: 3435237 (1969-03-01), Collins
patent: 4470710 (1984-09-01), Crane et al.
patent: 4481417 (1984-11-01), Inglee
patent: 4579461 (1986-04-01), Rudolph
patent: 4626686 (1986-12-01), Pompei et al.
patent: 4659234 (1987-04-01), Brouwer et al.
patent: 4722612 (1988-02-01), Junkert et al.
patent: 4764025 (1988-08-01), Jensen
patent: 4765752 (1988-08-01), Beynon et al.
patent: 4948958 (1990-08-01), Sweeney
patent: 5061084 (1991-10-01), Thompson et al.
patent: 5081359 (1992-01-01), Pompei
patent: 5180227 (1993-01-01), John et al.
patent: 5229612 (1993-07-01), Pompei et al.
Raynger User's Manual, Raytek, Inc., Santa Cruz, CA, 1983, pp. 1-17.
Barron, W.R., "Principles of Infrared Thermometry," Sensors Magazine, vol. 9, No. 13, 1992, (reproduced with permission).
Hawley's Condensed Chemical Dictionary, Twelfth Edition, Revised by Richard J. Lewis, Sr., 1993, p. 1022.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Infrared thermocouple improvements does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Infrared thermocouple improvements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared thermocouple improvements will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2210300

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.