Method for measuring temperature of object in atmosphere having dust

Patent metadata

Field	Value
Publication number	US-9863812-B2
Application number	US-201515124475-A
Country	US
Kind code	B2
Filing date	Feb 25, 2015
Priority date	Mar 17, 2014
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A first radiance meter that is provided so as to face an object in an atmosphere in which there is dust and measures the radiance of the object and a second radiance meter that is provided so as not to oppose the object and measures the radiance of the dust between the object and the first radiance meter are used to measure the temperature of the object on the basis of the object radiance that has been measured by the first radiance meter and the radiance of the dust between the object and the first radiance meter that has been measured by the second radiance meter.

First claim

The invention claimed is:

1. A method for measuring a temperature of an object, the method using a first radiance meter which is provided to face the object in an atmosphere where dust is present and measures a radiance of the object and a second radiance meter which is provided without facing the object and measures a radiance of the dust present between the object and the first radiance meter so that a temperature of the object is measured from the radiance of the object measured by the first radiance meter and the radiance of the dust present between the object and the first radiance meter measured by the second radiance meter.

2. The method for measuring a temperature of an object according to claim 1 ,
wherein the radiance of the dust is measured at two wavelengths.

3. The method for measuring a temperature of an object according to claim 2 ,
wherein, at the time of measuring the radiance of the dust, the measurement is performed in a state where a temperature of a wall surface facing the second radiance meter is lowered by cooling structure.

4. The method for measuring a temperature of an object according to claim 2 ,
wherein, at the time of measuring the radiance of the dust, an emissivity of a wall surface facing the second radiance meter is set to 0.9 or more.

5. The method for measuring a temperature of an object according to claim 2 ,
wherein the radiance of the object is measured at two wavelengths.

6. The method for measuring a temperature of an object according to claim 2 ,
wherein a plurality of radiance meters are used as the second radiance meter to measure two or more radiances of the dust, and the measurement is made from the radiance of the object measured by the first radiance meter and the two or more radiances of the dust present between the object and the first radiance meter measured by the plurality of second radiance meters.

7. The method for measuring a temperature of an object according to claim 1 ,
wherein, at the time of measuring the radiance of the dust, the measurement is performed in a state where a temperature of a wall surface facing the second radiance meter is lowered by cooling structure.

8. The method for measuring a temperature of an object according to claim 7 ,
wherein, at the time of measuring the radiance of the dust, an emissivity of the wall surface facing the second radiance meter is set to 0.9 or more.

9. The method for measuring a temperature of an object according to claim 7 ,
wherein the radiance of the object is measured at two wavelengths.

10. The method for measuring a temperature of an object according to claim 7 ,
wherein a plurality of radiance meters are used as the second radiance meter to measure two or more radiances of the dust, and the measurement is made from the radiance of the object measured by the first radiance meter and the two or more radiances of the dust present between the object and the first radiance meter measured by the plurality of second radiance meters.

11. The method for measuring a temperature of an object according to claim 1 ,
wherein, at the time of measuring the radiance of the dust, an emissivity of a wall surface facing the second radiance meter is set to 0.9 or more.

12. The method for measuring a temperature of an object according to claim 11 ,
wherein, at the time of measuring a radiance of the dust, a blackbody cavity is provided in the wall surface facing the second radiance meter.

13. The method for measuring a temperature of an object according to claim 12 ,
wherein the radiance of the object is measured at two wavelengths.

14. The method for measuring a temperature of an object according to claim 12 ,
wherein a plurality of radiance meters are used as the second radiance meter to measure two or more radiances of the dust, and the measurement is made from the radiance of the object measured by the first radiance meter and the two or more radiances of the dust present between the object and the first radiance meter measured by the plurality of second radiance meters.

15. The method for measuring a temperature of an object according to claim 11 ,
wherein the radiance of the object is measured at two wavelengths.

16. The method for measuring a temperature of an object according to claim 11 ,
wherein a plurality of radiance meters are used as the second radiance meter to measure two or more radiances of the dust, and the measurement is made from the radiance of the object measured by the first radiance meter and the two or more radiances of the dust present between the object and the first radiance meter measured by the plurality of second radiance meters.

17. The method for measuring a temperature of an object according to claim 1 ,
wherein the radiance of the object is measured at two wavelengths.

18. The method for measuring a temperature of an object according to claim 17 ,
wherein a plurality of radiance meters are used as the second radiance meter to measure two or more radiances of the dust, and the measurement is made from the radiance of the object measured by the first radiance meter and the two or more radiances of the dust present between the object and the first radiance meter measured by the plurality of second radiance meters.

19. The method for measuring a temperature of an object according to claim 1 ,
wherein a plurality of radiance meters are used as the second radiance meter to measure two or more radiances of the dust, and the measurement is made from the radiance of the object measured by the first radiance meter and the two or more radiances of the dust present between the object and the first radiance meter measured by the plurality of second radiance meters.

Assignees

• Mitsubishi Materials Corp
• Ube Industries
• Sumitomo Osaka Cement Co Ltd
• Taiheiyo Cement Corp

Inventors

• Shima Hirokazu
• Takata Yoshiaki

Classifications

• G01J5/0003 Primary

  for sensing the radiant heat transfer of samples, e.g. emittance meter · CPC title

• G01J2005/607

  on two separate detectors · CPC title

• F27D2019/0012

  Monitoring the composition of the atmosphere or of one of their components · CPC title

• F27B7/20

  Details, accessories or equipment specially adapted for rotary-drum furnaces · CPC title

• G01J5/60 Primary

  using determination of colour temperature · CPC title