IMPROVEMENTS IN OR RELATING TO RADIATION PYROMETERS

Patent · Tue Aug 01 04:00:00 EDT 1961

OSTI ID:4843569

Avery, D G; Reid, C D

A radiation pyrometer is described that is suitable for measuring the surface temperature of metal bars in passage through a narrow zone between a heating zone and a quenching zone at temperatures in the range 650 to 750 deg C. The pyrometer consists of a rod of material capable of transmitting radiation over the wavelength interval lambda /sub 1/ to lambda /sub 3/. The rod has breaks for the first and second radiation choppers, and has a shaped radiation receiving end for partly encircling the radiation source. The radiation transmission path has a radiation receiving end for positioning adjacent to a radiation source, a photocell at the other end for receiving the transmitted radiation, a first radiation chopper in the path having wavelength transmission intervals lambda /sub 1/ to lambda /sub 2/ and lambda /sub 2/ to lambda /sub 3/, where lambda /sub 2/ lies between lambda /sub 1/ and lambda /sub 3/, so t hat the photocell receives alternate signals related to the transmission intervals lambda /sub 1/ to lambda /sub 2/ and lambda /sub 2/ to lambda /sub 3/ respectively. A secon d radiation chopper in the path provides a carrier signal for the alternate signals and means for determining the ratio of amplitude of the alternate signals. (N.W.R.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-027836
• OSTI ID: 4843569
• Report Number(s): GB 874000
• Country of Publication: United Kingdom
• Language: English

Related Subjects

CONFIGURATION
ENGINEERING AND EQUIPMENT
FREQUENCY
HEAT TRANSFER
HEATING
METALLURGY
METALS
PHOTOELECTRIC CELLS
PYROMETERS
RADIATION DETECTORS
RADIATION SOURCES
RODS
SURFACES
TEMPERATURE
TEMPERING
THERMOMETERS