JP2022133224A - Apparatus and method for measuring wear amount of furnace wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for measuring a wear amount of a furnace wall for performing measurement at a relatively small data processing load by using the same image as a display image.

SOLUTION: A method for measuring a wear amount of a furnace wall whose surface temperature may possibly be within a temperature range including 700°C-1000°C includes the steps of: acquiring an image of the furnace wall by two color cameras spaced apart from each other, while generating a laser line on the furnace wall in a reference state, and acquiring a distance from the two color cameras to the furnace wall by a processor using the image; acquiring an image of the furnace wall by the two color cameras spaced apart from each other, while generating the laser line on the furnace wall in a state after the operation, and acquiring a distance from the two color cameras to the furnace wall by the processor using the image; and acquiring a wear amount of the furnace from a difference between the distances in the reference state and the state after the operation by the processor.

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2022,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a furnace wall wear amount measuring device and a furnace wall wear amount measuring method.

In a furnace in which the furnace wall reaches a high temperature of 1000° C. or higher due to the contents of the furnace, the high-temperature contents wear the furnace wall and change the shape of the furnace wall. If the amount of wear on the furnace wall becomes large, there is a risk of a serious accident such as breakage of the furnace. Therefore, it is important to measure the wear amount of the furnace wall with high accuracy.

For the purpose of measuring the amount of wear of a furnace wall that reaches a high temperature, the applicant has developed a wear amount measuring device and a method of measuring the wear amount of a furnace wall using a laser (Patent Document 1).

In the laser measurement method, a laser line is generated on the furnace wall, a monochrome image of the laser line on the furnace wall is acquired by a monochrome camera equipped with a laser wavelength filter, and the monochrome image is used to measure the furnace Wall wear is measured.

On the other hand, when an operator observes the state of the furnace wall, a color image with a larger amount of information than a monochrome image is used. Therefore, in the method of measuring the amount of wear of the furnace wall by acquiring a monochrome image of the laser line, the monochrome image of a specific wavelength used for measuring the amount of wear of the furnace wall and the color image for operator observation are different. In contrast, it is not possible to perform consistent processing based on the same image when measuring the wear amount of the furnace wall and displaying the furnace wall.

On the other hand, if a color image is used to measure the amount of wear of the furnace wall, the amount of data to be processed becomes enormous, which is undesirable.

Thus, a furnace wall wear measuring apparatus and a furnace wall wear measuring method that use the same image as the display image and perform measurement with a relatively small data processing load have not been developed.

Patent No. 6743316

Therefore, there is a need for a furnace wall wear measuring apparatus and a furnace wall wear measuring method that use the same image as the display image and carry out measurements with a relatively small data processing load. A technical object of the present invention is to provide a furnace wall wear measuring apparatus and a furnace wall wear measuring method that use the same image as the display image and perform measurement with a relatively small data processing load. be.

A method for measuring the amount of wear of a furnace wall according to the first aspect of the present invention is a method for measuring the amount of wear of a furnace wall in which the temperature of the surface can be in a temperature range including 700 ° C.-1000 ° C., and An image of the furnace wall is acquired by two color cameras spaced apart while generating laser lines at , and the image is used by a processor to determine the distance from the two color cameras to the furnace wall. obtaining an image of the furnace wall by two color cameras spaced apart while generating laser lines on the furnace wall in the post-run state, and using the image by a processor to Determining the distance to the furnace wall from two color cameras, and determining the amount of wear of the furnace wall from the difference in distance between the reference condition and the post-run condition by the processor. In this method, from the image data of each color camera, the processor creates a monochrome image in which the value of each pixel is the sum of the values obtained by multiplying the R value, G value, and B value of each pixel by weights. and determine the distance from the two color cameras to the furnace wall using a monochrome image generated from the image data of the two color cameras.

In the furnace wall wear amount measuring method of this embodiment, a monochrome image generated from image data of a color camera is used, and a laser line generated on the furnace wall in a relatively low temperature region Top points are identified, and in relatively hot regions, points on the furnace wall are identified from the pattern of light and dark due to temperature differences on the surface of the furnace wall.

According to this aspect, since the image generated from the image data of the color camera is used, the shape of the furnace wall can be measured using the same image as the display image. In addition, since a monochrome image is used to measure the amount of wear on the furnace wall, the data processing load can be reduced.

In the method for measuring the amount of wear according to the first embodiment of the first aspect of the present invention, in the step of determining the amount of wear of the furnace wall, a wear amount map indicating the amount of wear for each section of the surface of the furnace wall is prepared. Ask.

According to this embodiment, the state of wear of the furnace wall can be easily grasped from the map of the amount of wear of the furnace wall. The furnace wall can be easily repaired in accordance with the furnace wall wear amount map.

In the wear amount measuring method of the second embodiment of the first aspect of the present invention, the shape of the furnace is a concave surface that is substantially axially symmetrical about the central axis, and the wear amount map is measured from the central axis direction to the furnace wall. Each section of the wear map is configured to be sectioned by a plurality of concentric circles centered on the central axis and a plurality of radial straight lines extending from the central axis.

The wear measurement method of the third embodiment of the first aspect of the present invention further includes the step of displaying the image of the furnace wall and the corresponding translucent image of the wear map in an overlapping manner.

According to this embodiment, the state of wear of the furnace wall can be easily grasped from the density of each section of the semi-transparent wear amount map.

A furnace wall repairing method according to a second aspect of the present invention comprises the steps of determining the amount of wear of the furnace wall by any of the above methods of measuring the amount of wear; and performing the repair.

According to the oven wall repair method of this aspect, the oven wall can be repaired with high accuracy based on the amount of wear of the oven wall measured by any one of the above methods of measuring the amount of wear.

A furnace wall wear amount measuring apparatus according to a third aspect of the present invention is a furnace wall wear amount measuring apparatus including a laser line generator, two color cameras arranged with an interval therebetween, and a processor. . In the apparatus for measuring the amount of wear and tear, the processor determines the value of each pixel by summing the values obtained by multiplying the R value, the G value, and the B value of each pixel by weights from the image data of each color camera. A monochrome image is generated, the distance from the two color cameras to the furnace wall is obtained using the monochrome image generated from the image data of the two color cameras, and the change in the distance over time is used to determine the It is configured to obtain the amount of wear of the furnace wall.

In the apparatus for measuring the amount of wear of the furnace wall of this embodiment, the monochrome image generated from the image data of the color camera is used to detect the laser beam generated by the laser line generator on the furnace wall in a relatively low temperature region. Points on the furnace wall are identified by lines, and points on the furnace wall are identified by patterns of light and dark due to temperature differences on the surface of the furnace wall in areas of relatively high temperature.

According to this aspect, since the image generated from the image data of the color camera is used, the shape of the furnace wall can be measured using the same image as the display image. In addition, since a monochrome image is used to measure the amount of wear on the furnace wall, the data processing load can be reduced.

In the wear amount measuring device of the first embodiment of the third aspect of the present invention, the laser line generator and the two color cameras are mounted near the central axis of the furnace so as to be rotatable around the central axis. ing.

According to this embodiment, the wear amount of the entire furnace wall can be measured by rotating the laser line generator and the two color cameras around the central axis.

A furnace wall repairing system according to a fourth aspect of the present invention comprises the aforementioned furnace wall wear measuring device and a furnace wall wear quantity received from the furnace wall wear measuring device for repairing the furnace wall. is configured to

According to the furnace wall repair system of this aspect, the furnace wall can be repaired with high accuracy based on the amount of wear of the furnace wall measured by the above-described apparatus for measuring the amount of wear of the furnace wall.

In the furnace wall repairing system of the first embodiment of the fourth aspect of the present invention, the furnace wall repairing machine includes a portion rotatable around the central axis near the central axis of the furnace, the laser line generator and The two color cameras are attached to the rotatable portion.

According to the furnace wall repairing system of the present embodiment, by rotating the rotatable portion around the central axis, the amount of wear and tear of an arbitrary portion of the furnace wall can be measured and repaired in a short time. can be done.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the configuration of a furnace wall wear amount measuring device according to the present invention; FIG. 10 is a diagram showing a state in which two color cameras and a laser line generator are installed in a furnace; It is a figure for demonstrating the principle of the shape measurement of the furnace wall by two cameras. Fig. 2 shows an image of the furnace wall immediately after batch processing by one color camera with a filter; It is a figure which shows the image of the furnace wall after spraying slurry-like refractories by the repair work after batch processing by said color camera. 1 is a flowchart for explaining a method for measuring the shape of a furnace wall according to the present invention; FIG. 7 is a diagram for explaining step S1030 in FIG. 6; FIG. 1 is a flowchart for explaining a method for measuring the amount of wear of a furnace wall according to the present invention; It is a top view of the steelmaking electric furnace after periodic maintenance. It is a side view of the steelmaking electric furnace after periodic maintenance. It is a top view of the steelmaking electric furnace after batch processing. It is a side view of the steelmaking electric furnace after batch processing. FIG. 4 is a diagram showing an example of a map of the amount of wear of the furnace wall of the steelmaking electric furnace immediately after batch processing. FIG. 14 is a diagram showing a map of the wear amount of the furnace wall after partially performing steps S4010 to S4030 on the furnace wall 210 immediately after the batch processing shown in FIG. 13; It is a figure which shows the structure of a repair machine. 1 is a diagram showing the configuration of a furnace wall repair system of the present invention; FIG. 1 is a flowchart for explaining a furnace wall repairing method according to the present invention; It is the photograph which shows the image of the furnace wall image|photographed with one color camera. FIG. 19 is a photograph of a screen in which the map of the amount of wear of the furnace wall obtained in step S3040 of FIG. 8 is superimposed on the photograph of FIG. 18. FIG.

The furnace wall wear amount measuring apparatus according to the present invention measures the shape of the furnace wall (the distance from the measurement point to the furnace wall), and measures the amount of wear of the furnace wall from changes in the shape of the furnace wall over time. In the following, first, the method of measuring the shape of the furnace wall (the distance from the measurement point to the furnace wall) will be described, and then the method of measuring the wear amount of the furnace wall will be described. Note that the measurement points will be described later.

FIG. 1 is a diagram showing the configuration of a furnace wall wear amount measuring apparatus 100 according to the present invention. A furnace wall wear measuring apparatus 100 of the present invention includes two color cameras 110A and 110B, a laser line generator 120, and a processor . Color cameras 110A and 110B are provided with filters 111A and 111B, respectively.

FIG. 2 shows a state in which the two color cameras 110A and 110B and the laser line generator 120 are installed in the furnace 200. As shown in FIG. FIG. 2 includes a plan view of furnace 200 and a cross-sectional view including the central axis AX of the furnace. Furnace 200 shown in FIG. 2 is an electric furnace for steelmaking. The furnace 200 has a concave furnace wall 210 that is substantially axially symmetrical about the central axis AX shown in FIG. Two color cameras 110A and 110B and a laser line generator 120 are installed near the central axis AX so as to be rotatable around the central axis AX. The laser line generator 120 is installed to generate a laser line substantially on the line of intersection of the plane containing the central axis AX and the surface of the furnace wall 210 . As shown in the plan view of FIG. 2, the color cameras 110A and 110B are arranged in the vicinity of the central axis AX of the furnace with an interval in the direction perpendicular to the parallel visual field central axes of the two cameras. Get an image of A position near the central axis AX of the furnace where the cameras 110A and 110B are arranged is called a measurement point. In FIG. 2, the camera fields of view of the two color cameras 110A and 110B and the drawing range of the laser lines are indicated by dashed lines. By rotating the two color cameras 110A and 110B and the laser line generator 120 about the central axis AX, the entire extent of the furnace wall 210 is scanned by the laser line and the laser beam of the entire extent of the furnace wall 210 is scanned. An image containing lines is acquired.

The radius of the furnace shown in FIG. It is about 4 meters. Also, the distance between the two color cameras is 0.5 meters.

FIG. 3 is a diagram for explaining the principle of furnace wall shape measurement using two cameras. The parallax when the point P1 on the furnace wall is measured by the two cameras 110A and 110B is θ1+φ1. The parallax when the point P2 on the furnace wall is measured after the position of the furnace wall 210 has changed due to wear or the like is θ2+φ2. From the distance and parallax between the two cameras 110A and 110B, the distance from the measurement point to any point on the furnace wall 210 can be determined by triangulation. If the distance to any point on the furnace wall 210 is obtained, the shape of the furnace wall can be obtained.

By the way, in order to obtain the distance from the measurement point to the point on the furnace wall by parallax, it is necessary to recognize the point on the furnace wall in the image of the furnace wall acquired by the two cameras. If the surface of the oven wall is smooth, the image will be uniform and no point on the oven wall will be discernible in the image. As a result, it is not possible to measure the distance to the point using the images of the furnace wall from the two cameras.

Here, an electric steelmaking furnace, which is an example of a target to which the present invention is applied, will be described. The object of the present invention is generally a furnace wall that can be in a wide temperature range including 700° C.-1000° C., and is not limited to the furnace wall of an electric steelmaking furnace.

A steelmaking electric furnace charged with raw material scrap and secondary raw material limestone is heated to the melting temperature of iron. Scrap in the electric furnace becomes molten steel. Slag is produced in the electric furnace by limestone that has absorbed impurities in the scrap. Since slag has a lower specific gravity than molten steel, it floats on molten steel from which impurities have been removed in an electric furnace. Slag and molten steel are removed separately from the electric furnace. 2. Description of the Related Art In an electric furnace for steelmaking, batch processing is repeated from charging raw materials and auxiliary raw materials to taking out slag and molten steel. Although the furnace wall is covered with a refractory material, the refractory material on the furnace wall is worn and the shape of the furnace wall changes due to the repetition of the above-described batch processing. If the localized wear of the furnace wall progresses, there is a danger of a serious accident occurring. In order to prevent localized damage to the furnace wall, the shape of the furnace wall is observed between batch processes, and repair work is carried out by spraying slurry-like refractory with a repair machine on areas where wear is large. be. In this case, it is necessary to measure the shape of the furnace wall with high accuracy in order to properly perform the repair work of the furnace wall to prevent local wear and tear.

Electric furnaces for steelmaking are subjected to repeated batch processes and used for a predetermined period of time, and then repaired while the operation is stopped. This repair is called a turnaround repair, which restores the refractories of the electric furnace to a standard state. The shape of the furnace wall after periodic repair may be used as a reference shape, and the repair work of the furnace wall may be performed based on the shape of the furnace wall measured between batch processes.

The temperature of the furnace wall after regular maintenance is room temperature. The temperature of the furnace wall immediately after batch processing reaches 1650°C. In addition, the temperature of the furnace wall after spraying the slurried refractory due to the repair work after batch processing becomes close to room temperature. Therefore, it is preferable that the furnace wall wear measuring apparatus 100 can measure the shape of the furnace wall in a temperature range from room temperature to 1650°C.

When the temperature of the object exceeds 1000° C., the image of a normal color camera cannot clearly distinguish the color and shade of the object due to halation. Therefore, when the object is a high-temperature furnace wall, it is not possible to clearly identify points on the furnace wall. I cannot ask.

Therefore, color cameras 110A and 110B of the present invention are provided with filters 111A and 111B, respectively. Filters 111A and 111B include a neutral density filter and an infrared cut filter. Halation can be prevented by a neutral density filter and an infrared cut filter.

FIG. 4 shows an image of the furnace wall immediately after batch processing by one color camera with a filter. The temperature of the furnace wall in this case is 1000° C. or higher.

Since the furnace wall shown in FIG. 4 is hot, the pattern caused by the radiant color and shade differences of the hot furnace wall can be clearly discerned in the image of FIG. Therefore, the points on the furnace wall can be identified by the above patterns in the images captured by the two cameras, and the shape of the furnace wall (the distance from the measurement point to the furnace wall) can be obtained from the images captured by the two cameras. On the other hand, the laser line produced on the furnace wall cannot be discerned in the image of FIG.

FIG. 5 is a diagram showing an image of the furnace wall after the slurry refractory is sprayed by the repair work after batch processing, using the color camera described above. As described above, the temperature of the furnace wall in this case is close to room temperature.

Since the oven wall shown in FIG. 5 is near room temperature, the pattern caused by the difference in color and shade of the oven wall cannot be discerned in the image of FIG. 5, but the laser lines can be clearly discerned. Therefore, points on the furnace wall can be identified by laser lines in images captured by the two cameras, and the shape of the furnace wall (distance from the measurement point to the furnace wall) can be obtained from the images captured by the two cameras.

In general, when the temperature of the furnace wall is relatively high, such as 700° C. or higher, the points on the furnace wall are identified by the patterns caused by the differences in color and shade of the furnace wall. When the temperature of the furnace wall is relatively low, such as below 700 degrees, points on the furnace wall are identified by laser lines drawn on the furnace wall. As described above, according to the method for measuring the shape of the furnace wall according to the present invention, the shape of the furnace wall can be measured in a wide temperature range from room temperature to 1650° C. with high accuracy.

The wavelength of the laser is preferably in the green wavelength range. As an example, the wavelength of the laser is 520 nanometers. The reason why the wavelength of the laser is in the green wavelength range is that the sensitivity of general color cameras is highest in this wavelength range.

FIG. 6 is a flow chart for explaining the furnace wall shape measuring method according to the present invention.

In step S1010 of FIG. 6, a laser line is generated on the furnace wall 210 by the laser line generator 120 .

At step S1020 in FIG. 6, images of the furnace wall 210 are acquired by the two color cameras 110A and 110B.

In step S1030 of FIG. 6, a monochrome image is generated from the color image data of the two color cameras 110A and 110B. Details of step S1030 will be described later.

The reason for using a monochrome image generated from a color image is as follows. First, it can take advantage of the large amount of information in color images. Second, by multiplying the R value, G value, and B value of each pixel of the image data of the color camera with weights, the points on the furnace wall are identified by the patterns caused by the differences in the color and shade of the furnace wall. You can adjust the image to make it easier. Thirdly, the load of data processing can be reduced by finally converting to a monochrome image.

By using a monochrome image generated from a color image, patterns caused by color and shade differences in the furnace wall can be identified with high accuracy. On the other hand, a monochrome image obtained by a monochrome camera cannot accurately identify the pattern caused by the difference in color and shade of the furnace wall.

A method for generating a monochrome image from color image data is described in Japanese Patent Application No. 2020-003664 (Patent No. 6734999) filed by the applicant of the present application.

FIG. 7 is a diagram for explaining step S1030 in FIG.

At step S2010 of FIG. 7, the processor 130 receives image data consisting of RGB values of each pixel of the image from the two color cameras 110A and 110B and stores in memory. Processor 310 generates R image data, G image data and B image data from the image data. R image data, G image data, and B image data are data in which each pixel has an R value, a G value, and a B value, respectively. The amount of data for pixels of a color image containing RGB values is 24 bits, while the amount of data for each pixel of the R, G, and B images is 8 bits.

In step S2020 of FIG. 7, the processor 130 creates a monochrome image in which the value of each pixel is the sum of the values obtained by multiplying the R value, G value, and B value of each pixel by weights c1, c2, and c3. Generate. The position of the pixel in the image is represented by (i, j), and the pixel values at the position (i, j) of the R image, G image, B image and monochrome image are represented by R(i, j) and G(i, j), B(i,j) and M(i,j), the following relationships hold.

M(i,j)=c1・R(i,j)＋c2・G(i,j)＋c3・B(i,j)

Here, the sum of c1, c2 and c3 is 1.0. While displaying and observing the generated monochrome image on the display 320 connected to the processor 310, the values of c1, c2 and c3 are determined so that the monochrome image becomes as clear as possible. The values of c1, c2 and c3 each range from 0 to 0.8. As an example, the values of c1, c2 and c3 are 0.2, 0.5 and 0.3 respectively.

In other embodiments, when the sum of c1, c2 and c3 is 1.0 and the values of c1, c2 and c3 each range from 0 to 0.8, then each of c1, c2 and c3 is The value may be defined as a function of the R value, a function of the G value, a function of the B value, or a function of the sum of the R, G and B values.

In general, the sum of c1, c2 and c3 should be a positive constant. Letting the positive constant be c0, the values of c1, c2 and c3 each range from 0 to 0.8×c0.

In step S1040 of FIG. 6, the monochrome image generated from the image data of the two color cameras 110A and 110B is used to determine the distance from the measurement point to the furnace wall.

By repeating steps S1010 to S1040 in FIG. 6 while rotating the two color cameras 110A and 110B and the laser line generator 120 around the central axis AX, the measurement point on the furnace wall from the measurement point on the central axis AX of the furnace From this, the shape of the entire furnace wall can be obtained.

As described above, according to the present invention, since the image generated from the image data of the color camera is used, the shape of the furnace wall (the distance from the measurement point to the furnace wall) can be determined using the same image as the display image. can be measured. Furthermore, the present invention has the following other advantages compared to acquiring images of laser lines with a monochrome camera. First, in terms of the amount of image processing required to measure a relatively hot furnace wall during batch processing in a short period of time, it is preferable to use patterns caused by color and shade differences on the furnace wall rather than laser lines. It is more advantageous to identify points on the wall. The reason for this is that the number of images required to identify all points in an area on the furnace wall by the pattern caused by the color and shade differences in the furnace wall does not allow the laser line to identify all points in the same area. This is because the number of images is smaller than the number of images required for Second, when points on the furnace wall are identified by patterns caused by differences in color and shade of the furnace wall, noise is reduced and measurement accuracy is improved by repeatedly measuring one point on the furnace wall. can be expected.

A method of measuring the amount of wear of the furnace wall based on the change in the shape of the furnace wall (the distance from the measurement point to the furnace wall) over time will be described below.

FIG. 8 is a flow chart for explaining the method of measuring the amount of wear of the furnace wall according to the present invention.

In step S3010 of FIG. 8, the shape of the furnace wall (the distance from the measurement point to the furnace wall) in the reference state is obtained according to the method shown in FIG. The reference state may be, for example, the state after regular maintenance of the steelmaking electric furnace.

FIG. 9 is a top view of a steelmaking electric furnace after regular maintenance.

FIG. 10 is a side view of a steelmaking electric furnace after regular maintenance.

In FIGS. 9 and 10, the distance from the measurement point to the furnace wall obtained according to the method shown in FIG. 6 is indicated by concentration. Locations with high concentrations are located at large distances from the measurement point.

FIGS. 9 and 10 show the condition that the furnace wall is almost normal temperature after the regular maintenance. Therefore, the furnace wall shape (the distance from the measurement point to the furnace wall) shown in FIGS. 9 and 10 was measured mainly by identifying points on the furnace wall with a laser line.

In step S3020 in FIG. 8, the shape of the furnace wall (the distance from the measurement point to the furnace wall) for which the amount of wear is to be obtained is obtained according to the method shown in FIG. The shape of the furnace wall for which the amount of wear is to be obtained may be, for example, the state after the batch processing of the steelmaking electric furnace.

FIG. 11 is a top view of a steelmaking electric furnace after batch processing.

FIG. 12 is a side view of the steelmaking electric furnace after batch processing.

In FIGS. 11 and 12, the distance from the measurement point where the cameras 110A and 110B are arranged to the oven wall, which is obtained according to the method shown in FIG. 6, is shown by concentration. Locations with high concentrations are located at large distances from the measurement point. Comparing FIGS. 9 and 11, and between FIGS. 10 and 12, the high-density portion in FIG. 11 is greater than in FIG. 9, and the high-density portion in FIG. 12 is greater than in FIG. Thus, in at least a part of the furnace wall, the distance from the measurement point on the furnace wall after batch processing is greater than the distance from the measurement point on the furnace wall after periodic maintenance.

11 and 12 show the state of the furnace wall at a high temperature of 1000° C. or higher immediately after batch processing. Therefore, the shape of the furnace wall (the distance from the measurement point to the furnace wall) shown in FIGS. It is what was done.

In step S3030 of FIG. 8, from the difference between the furnace wall shape (distance from the measurement point to the furnace wall) obtained in step S3010 and the furnace wall shape (distance from the measurement point to the furnace wall) obtained in step S3020, Obtain the amount of wear on the furnace wall. As an example, the amount of wear of the furnace wall after one or more batches of processing and after regular maintenance is determined.

In step S3040 of FIG. 8, a furnace wall wear amount map is obtained using the furnace wall wear amount obtained in step S3030.

FIG. 13 is a diagram showing an example of a map of the amount of wear of the furnace wall of the steelmaking electric furnace immediately after batch processing. In the map of the amount of wear in this example, the polar coordinates (r, θ) is used to represent the position on the map. r is the distance from the center axis AX of a certain point on the furnace wall, and θ is a plane perpendicular to the center axis AX that includes the point corresponding to the plane of the map, with the origin being the position of the center axis AX. It is the angle of the straight line connecting the origin and the point with respect to the straight line in the reference direction. The map is centered at the origin and divided into sections by a plurality of concentric circles of a given size with a difference in radius and a plurality of straight lines passing through the origin with a given angle of difference in θ. An average value of the amount of wear is obtained for each section, and the average value is taken as the amount of wear for that section. In the map of the amount of wear shown in FIG. 13, the amount of wear is represented by density. That is, the higher the concentration, the greater the amount of wear.

Next, the repair of the furnace wall will be explained in detail. The furnace wall is repaired by a repairing machine 300 that sprays slurry-like refractory material on the portion where wear is large.

FIG. 15 is a diagram showing the configuration of the repair machine 300. As shown in FIG. The repairing machine 300 includes a support 310, a crane 320 attached to the support 310, an elevating section 330 that is lifted and lowered by the crane, a rotating shaft 340 rotatably attached to the elevating section 330, and a rotating shaft 340 attached to the furnace. and a nozzle portion 350 for spraying the wall 210 with a slurry of refractory material. The nozzle part 350 is operably attached to the rotating shaft 340 via a joint so that the spraying position can be changed in the vertical direction within a plane including the rotating shaft 340 . A crane 320 locates the axis of rotation 340 . The polar coordinate θ of the nozzle 350 can be determined by rotating the rotating shaft 340 , and the polar coordinate r of the spraying position can be determined by changing the direction of the nozzle 350 in the vertical direction in the plane including the rotating shaft 340 . In this way, the slurried refractory can be sprayed from the nozzle 350 to an arbitrary polar coordinate (r, θ) position on the furnace wall 210 .

Here, camera 110A, camera 110B and laser line generator 120 are attached to rotating shaft 340 and rotate together with rotating shaft 340. FIG. The data transmission unit 135 is installed on the elevator 330 so as to surround the rotating shaft 340 . The data transmission unit 135 acquires the image data of the camera 110A and the camera 110B rotating together with the rotating shaft 340 and transmits them to the processor 130 .

FIG. 16 is a diagram showing the configuration of a furnace wall repair system 500 of the present invention. Furnace wall repair system 500 includes cameras 110A, 110B, and laser line generator 120 attached to rotation shaft 340 of repair machine 300, data transmission unit 135 installed in lifting section 330 of repair machine 300, and furnace wall wear and tear. It includes a quantity measurement processor 130 , a repair machine controller 140 and a repair machine 300 . Since the camera 110A, the camera 110B and the laser line generator 120 are attached to the rotating shaft 340 of the repairing machine 300 as described above, the processor 130 obtains the rotating direction position of the rotating shaft 340 of the repairing machine 300 from the repairing machine controller 140. By receiving it, the direction of the visual field center axis of the camera 110A and the camera 110B can be grasped. The processor 130 obtains the polar coordinates θ of the visual field center axes of the cameras 110A and 110B from the rotation direction position of the rotation axis 340, and stores them in association with the images acquired from the cameras 110A and 110B.

FIG. 17 is a flow chart for explaining the furnace wall repair method according to the present invention.

In step S4010 of FIG. 17, the processor 130 obtains the repair target section of the furnace wall 210 and the wear amount of the section from the wear amount map. An example of the wear amount map used in this step is shown in FIG.

At step S4020 of FIG. 17, the processor 130 determines the spray amount of slurry refractory from the amount of wear in the section to be repaired.

In step S4030 of FIG. 17, the repair machine controller 140 receives the spray amount of the section to be repaired from the processor 130, and controls the repair machine 300 so that the repair machine 300 sprays the spray amount to the section to be repaired.

In steps S4010-S4030, the processor 130 identifies the section to be repaired by the polar coordinates (r, θ), sends the polar coordinates (r, θ) of the section to be repaired to the repair machine controller 140, and the repair machine controller 140 determines the section to be repaired. The rotational position of the rotating shaft 340 and the direction of the nozzle 350 may be determined according to the polar coordinates (r, θ) of .

If the size of the section on the wear amount map is determined according to the area where the slurry refractory spreads on the furnace wall by one injection of the nozzle 350, the average value of the wear amount of the section will be the ejection of the nozzle 350. It is preferable because the amount can be determined.

Steps S4020-S4030 may be performed by processor 130 and repair machine controller 140, as described above, or by an operator.

FIG. 14 is a diagram showing a map of the amount of wear of the furnace wall after partial execution of steps S4010 to S4030 for the furnace wall immediately after the batch processing shown in the map of the amount of wear in FIG. Comparing the map of the amount of wear of the furnace wall in FIG. 14 with the map of the amount of wear of the furnace wall in FIG. On the other hand, plots without remediation remain highly concentrated.

FIG. 18 is a photograph showing an image of the furnace wall 210 taken by one of the color cameras.

FIG. 19 is a photograph of a screen in which the map of the amount of wear of the furnace wall obtained in step S3040 of FIG. 8 is superimposed on the photograph of FIG. The above screens may be displayed on a display device connected to the processor 130, not shown in FIG. The map of the amount of wear superimposed on the image of the furnace wall is translucent, and the magnitude of the amount of wear is indicated by shading. The concentration is high in the compartment with the large amount of wastage. The operator can easily grasp the progress of the repair of the furnace wall by the density of each section of the semi-transparent wear amount map shown on the screen of FIG.

Claims (9)

A method for measuring the amount of wear of a furnace wall whose surface temperature can be in a temperature range including 700 ° C.-1000 ° C.,
An image of the furnace wall is acquired by two color cameras spaced apart while generating a laser line on the furnace wall in a reference condition, and the image is used by a processor to generate a laser line from the two color cameras. determining the distance to the furnace wall;
Images of the furnace wall are acquired by two color cameras spaced apart while producing laser lines on the furnace wall in the post-run state, and the images are used by a processor to detect the two color determining the distance from the camera to the furnace wall;
determining, by the processor, the amount of wear of the furnace wall from the difference in distance between the base condition and the after-run condition;
The processor generates, from the image data of each color camera, a monochrome image in which the value of each pixel is the sum of the values obtained by multiplying the R value, G value, and B value of each pixel by weights, A method for measuring the amount of wear of a furnace wall, wherein a monochrome image generated from image data of two color cameras is used to obtain a distance from the two color cameras to the furnace wall. 2. The method of measuring the amount of wear of the furnace wall according to claim 1, wherein in the step of determining the amount of wear of the furnace wall, a wear amount map showing the amount of wear for each section of the surface of the furnace wall is obtained. The shape of the furnace is a concave surface that is substantially axially symmetrical about the central axis, the wear amount map is obtained by observing the furnace wall from the direction of the central axis, and each section of the wear amount map has the central axis. 3. The method of measuring the amount of wear according to claim 2, wherein the area is divided by a plurality of concentric circles and a plurality of radial straight lines extending from the central axis. 4. The furnace wall wear measurement method according to claim 2, further comprising the step of displaying an image of the furnace wall and a semi-transparent image of the corresponding wear map in an overlapping manner. A furnace wall repair method for repairing a furnace wall,
obtaining the amount of wear of the furnace wall by the method of measuring the amount of wear according to any one of claims 1 to 4;
and a step of repairing the furnace wall by a furnace wall repairing machine based on the amount of wear. A furnace wall wear measurement device including a laser line generator, two spaced apart color cameras, and a processor, wherein the processor detects each pixel from the image data of each color camera. A monochrome image is generated in which each pixel value is the sum of the weighted values of the R value, G value, and B value, and the monochrome image generated from the image data of the two color cameras is generated. A furnace wall wear measuring device configured to obtain the distance from the two color cameras to the furnace wall and to obtain the wear of the furnace wall from changes in the distance over time. 7. The apparatus for measuring the amount of wear and tear according to claim 6, wherein said laser line generator and said two color cameras are mounted near the central axis of the furnace so as to be rotatable around said central axis. A furnace wall wear amount measuring device according to claim 6;
and a furnace wall repairing machine configured to repair the furnace wall based on the amount of wear of the furnace wall received from the wear amount measuring device of the furnace wall. 9. The furnace wall repairing machine according to claim 8, wherein the furnace wall repairing machine comprises a part rotatable around the central axis near the central axis of the furnace, and the laser line generator and the two color cameras are mounted on the rotatable part. A furnace wall repair system as described.

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