Oven wall shape measuring apparatus, oven wall shape measuring system, and oven wall shape measuring method

Patent metadata

Field	Value
Publication number	US-9638516-B2
Application number	US-201113997987-A
Country	US
Kind code	B2
Filing date	Dec 19, 2011
Priority date	Dec 27, 2010
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

An oven wall shape measuring apparatus includes: a slit laser light source that is arranged in a thermally-insulated protection box having a slit-like window and emits slit-like laser light; a laser light mirror that reflects the laser light and irradiates an oven wall surface with the laser light via the window; an imaging mirror that reflects reflected light due to irradiation of the laser light and self-emitting light emitted from the oven wall surface, the reflected light and the self-emitting light entering the thermally-insulated protection box via the window; and an imaging device that images, via an optical filter, the self-emitting light and the reflected light that are reflected from the imaging mirror.

First claim

The invention claimed is:

1. An oven wall shape measuring apparatus, comprising:
a slit laser light source that is arranged in a thermally-insulated protection box having a slit-like window and emits slit-like laser light;
a laser light mirror that reflects the laser light and irradiates an oven wall surface with the laser light via the window;
an imaging mirror that reflects reflected light due to irradiation of the laser light and self-emitting light emitted from the oven wall surface, the reflected light and the self-emitting light entering the thermally-insulated protection box via the window, wherein the self-emitting light is light which is emitted from the oven wall surface due to high temperature of the oven wall surface;
an optical filter that has a first transmission region having bandpass characteristics of a narrow band and transmitting there through a wavelength of the laser light, and a second transmission region having bandpass characteristics of a broad band and transmitting therethrough a wavelength of the self-emitting light, the first transmission region and the second transmission region being arranged in parallel to each other in an incidence plane of the optical filter; and
an imaging device that images, via the optical filter, the self-emitting light and the reflected light that are reflected from the imaging mirror.

2. The oven wall shape measuring apparatus according to claim 1 , wherein:
an optical axis of the laser light emitted from the slit laser light source is arranged parallel to a longitudinal surface of the thermally-insulated protection box, and
an incident angle of the laser light relative to the laser light mirror is equal to or less than 60 degrees.

3. An oven wall shape measuring system, comprising:
the oven wall shape measuring apparatus according to claim 1 ;
a position detecting unit that detects an intra-oven position of the oven wall shape measuring apparatus; and
an image processing unit that generates a self-emitting light image of the oven wall surface and an image of an irregular shape from an image captured by the imaging device of the oven wall shape measuring apparatus and a position of the oven wall shape measuring apparatus.

4. The oven wall shape measuring system according to claim 3 , wherein the image processing unit generates the self-emitting light image of the oven wall surface and the image of the irregular shape by sorting, with respect to an intra-oven position of the oven wall shape measuring apparatus detected by the position detecting unit:
a one-dimensional self-emitting light line of one line in a vertical direction in an image region of which the self-emitting light has been imaged; and
a one-dimensional irregular shape line obtained by calculating an irregular shape of one line in a vertical direction of an oven wall based on a principle of triangulation from an image of the slit-like laser light in an image region of which the reflected light has been imaged.

5. An oven wall shape measuring system, comprising:
an oven wall shape measuring apparatus that is capable of separately imaging, within one image, reflected light of slit-like laser light irradiated to an oven wall surface and self-emitting light emitted from the oven wall surface by use of an optical filter that has a first transmission region having bandpass characteristics of a narrow band and transmitting there through a wavelength of the laser light, and a second transmission region having bandpass characteristics of a broad band and transmitting therethrough a wavelength of the self-emitting light, the first transmission region and the second transmission region being arranged in parallel to each other in an incidence plane of the optical filter, wherein the self-emitting light is light which is emitted from the oven wall surface due to high temperature of the oven wall surface;
a position detecting unit that detects an intra-oven position of the oven wall shape measuring apparatus; and
an image processing unit that generates a self-emitting light image of the oven wall surface and an image of an irregular shape, from an image captured by an imaging device of the oven wall shape measuring apparatus and an intra-oven position of the oven wall shape measuring apparatus.

6. The oven wall shape measuring system according to claim 5 , wherein the image processing unit generates the self-emitting light image of the oven wall surface and the image of the irregular shape by sorting, with respect to an intra-oven position of the oven wall shape measuring apparatus detected by the position detecting unit:
a one-dimensional self-emitting light line of one line in a vertical direction in an image region of which the self-emitting light has been imaged and a one-dimensional irregular shape line obtained by calculating an irregular shape of one line in a vertical direction of an oven wall based on a principle of triangulation from an image of the slit-like laser light in an image region of which the reflected light has been imaged.

7. An oven wall shape measuring method for measuring an oven wall shape using an oven wall shape measuring apparatus which comprises a slit laser light source and an imaging device, the method comprising:
detecting an intra-oven position of the oven wall shape measuring apparatus;
separately imaging, within one image, reflected light of slit-like laser light irradiated to an oven wall surface and self-emitting light emitted from the oven wall surface, with the oven wall shape measuring apparatus, by use of an optical filter of the oven wall shape measuring apparatus, wherein the optical filter that has a first transmission region having bandpass characteristics of a narrow band and transmitting there through a wavelength of the laser light, and a second transmission region having bandpass characteristics of a broad band and transmitting therethrough a wavelength of the self-emitting light, the first transmission region and the second transmission region being arranged in parallel to each other in an incidence plane of the optical filter, and wherein the self-emitting light is light which is emitted from the oven wall surface due to high temperature of the oven wall surface;
extracting a one-dimensional self-emitting light line of one line in a vertical direction in an image region of which the self-emitting light has been imaged;
calculating a one-dimensional irregular shape line in a vertical direction of an oven wall based on a principle of triangulation from an image of the slit-like laser light in an image region of which the reflected light has been imaged; and
generating a self-emitting light image of the oven wall surface and an image of an irregular shape by using the detected intra-oven position of the oven wall shape measuring apparatus, the extracted one-dimensional self-emitting light line, and the calculated one-dimensional irregular shape line.

8. The oven wall shape measuring method according to claim 7 , wherein the generating includes generating the self-emitting light image of the oven wall surface and the image of the irregular shape by sorting, with respect to an intra-oven position of the oven wall shape measuring apparatus:
the extracted one-dimensional self-emitting light line; and
the calculated one-dimensional irregular shape line.

9. An oven wall shape measuring system, comprising:
the oven wall shape measuring apparatus according to claim 2 ;
a position detecting unit that detects an intra-oven position of the oven wall shape measuring apparatus; and
an image processing unit that generates a self-emitting light image of the oven wall surface and an image of an irregular shape from an image captured by the imaging device of the oven wall shape

Assignees

• Yamahira Naoshi
• Kodama Toshifumi
• Jfe Steel Corp

Inventors

• Yamahira Naoshi
• Kodama Toshifumi

Classifications

• C10B45/00 Primary

  Other details · CPC title

• G01B11/2518

  Projection by scanning of the object · CPC title

• G01N21/954

  Inspecting the inner surface of hollow bodies, e.g. bores · CPC title

• G01B11/24 Primary

  for measuring contours or curvatures · CPC title

• F27D21/0021

  Devices for monitoring linings for wear · CPC title