Title:
EMISSIVITY MEASURING INSTRUMENT
Document Type and Number:
Japanese Patent JPH03237321
Kind Code:
A
Abstract:
PURPOSE:To accurately derive emissivity without installing a black body furnace actually, to simplify the structure and to miniaturize this instrument by converting a temperature/output characteristic into a temperature output characteristic when a black body is measured. CONSTITUTION:The temperature of a body 4 to be measured which is adjusted to proper temperature by a temperature controller 1 is measured by a thermocoupler 7, and a converting circuit 8 converts the electromotive force of the thermocouple 7 into an output value Eb obtained when a photodetector 5 measures the black body at the same temperature with the body. The photodetector 5 measures the radiation of the body 4 to obtain an output Es. The output Es is used together with the output Eb to calculate the emissivity epsilon(Es/Eb) by a dividing circuit 6.
Inventors:
SASAKI MASANAO
Application Number:
JP3344190A
Publication Date:
October 23, 1991
Filing Date:
February 13, 1990
Export Citation:
Assignee:
TOKAI CARBON KK
International Classes:
G01J5/00; (IPC1-7): G01J5/00
Domestic Patent References:
| JPS6488126A | 1989-04-03 | |||
| JPS63187128A | 1988-08-02 | |||
| JPS62163937A | 1987-07-20 | |||
| JPS56104226A | 1981-08-19 | |||
| JPS59160723A | 1984-09-11 |
Attorney, Agent or Firm:
Masaya Takahata