TWI617669B - Method for measuring volume of material layer in blast furnace - Google Patents

Abstract

The invention relates to a method for measuring the volume of a layer in a blast furnace, comprising: scanning a first material surface in a blast furnace two-dimensionally to obtain a first surface curve on a blast furnace coordinate system; a second level to obtain a second level curve on the blast furnace coordinate system; and integrating the area between the first level curve and the second level curve around the Y axis rotation of the high furnace coordinate system In turn, the volume of the layer between the first level and the second level is obtained.

Description

Method for measuring the volume of a layer in a blast furnace

This invention relates to the field of blast furnace cloth operations, and more particularly to a method of measuring the volume of a layer in a blast furnace.

The cloth operation mode of the blast furnace will affect the distribution of the material layer structure and the furnace gas. In the process of feeding, if the volume change between the material layer and the material layer can be grasped, the fabric characteristics and the feeding speed can be understood, and the material can be improved. The gas permeability of the surface, the use rate of the reaction gas, and the heat load of the furnace wall are stabilized.

However, in the past, the blast furnace measuring surface was estimated by using a hanging material hammer to roughly measure several points of the material surface, and the volume between the material layers could not be measured quickly and accurately.

Therefore, it is necessary to provide a method for measuring the volume of the layer in the blast furnace to solve the problems of the conventional technology.

The main object of the present invention is to provide a method for measuring the volume of a layer in a blast furnace, which can replace the traditional inefficient measurement method to quickly and accurately measure the volume between the layers.

In order to achieve the above object, the present invention provides a material for measuring blast furnace The layer volume method is performed by a computer connected to a range finder, wherein the computer system has a Y-axis built through a blast furnace coordinate system at the center of a blast furnace; the range finder is installed above a blast furnace surface The method comprises the following steps: S1: two-dimensional scanning of a first level in the blast furnace to obtain a first level curve on the blast furnace coordinate system; S2: two-dimensional scanning of a second surface in the blast furnace a surface to obtain a second level curve on the blast furnace coordinate system; and S3: the area between the first level curve and the second level curve is rotated around the Y axis of the blast furnace coordinate system The integral, in turn, results in a layer volume between the first level and the second level.

In an embodiment of the present invention, the step S1 includes: performing a two-dimensional scan of the first material surface in the blast furnace by the range finder to obtain a first point group data; and filtering out the first point group data. Unreasonable point group; curve fitting is performed on the remaining point group to obtain a first fitting curve; and the first fitting curve is used to determine whether there is a point in the previously filtered point group that is improperly filtered. And re-curving the curve to obtain the first level curve.

In an embodiment of the present invention, the step of filtering out an unreasonable point group in the first point group data is determined on the X-axis by any one of the first point group data except the endpoint Whether the distance from a point x _1(i) to a line formed by two adjacent points (x _1(i-1) , x _1(i+1) ) is greater than a first threshold value, if greater than the first threshold value The point x _1(i) is filtered from the first point group data.

In an embodiment of the present invention, the step of determining, by the first fitting curve, whether there is a point that is improperly filtered in the previously filtered point group determines that each point in the filtered point group is to the first Whether the distance of the curve is less than a second threshold, If it is less than the second threshold, the point is added to the first point group data again.

In an embodiment of the present invention, the step S2 includes: performing a two-dimensional scan on the second surface of the blast furnace by the range finder to obtain a second point group data; filtering the second point group data Unreasonable point group; curve fitting the remaining point group to obtain a second fitting curve; determining, by the second fitting curve, whether there is a point in the previously filtered point group that is improperly filtered; and A curve fit is performed to obtain the second level curve.

In an embodiment of the present invention, the step of filtering out an unreasonable point group in the second point group data is determined on the X-axis by any one of the second point group data except the endpoint Whether the distance from a point x _(i) to a line formed by two adjacent points (x _(i-1) , x _(i+1) ) is greater than a first threshold, and if greater than the first threshold The point x _(i) is filtered out from the first point group data.

In an embodiment of the present invention, the step of determining, by the second fitting curve, whether there is a point that is improperly filtered in the previously filtered point group determines that each point in the filtered point group and the second Whether the distance between the curves is less than a second threshold, and if less than the second threshold, the point is added to the second point group data again.

In an embodiment of the present invention, in the step S3, the first level curve and the second level curve are sampled on the X-axis coordinate in the range of the blast furnace coordinate system, wherein N points are between adjacent points. The interval is Δd, the sampling point group on the first level curve is H={h _i }, h _i =(x _i , y _i ), i=1 to N; the sampling point on the second level curve The group is G={g _i }, g _i =(x _i ,y' _i ), i=1 to N; and the following equation And further, the volume V of the layer between the first level and the second level is obtained.

In an embodiment of the invention, the first threshold is 0.2 meters.

In an embodiment of the invention, the second threshold is 0.2 meters.

1‧‧‧ blast furnace

10‧‧‧Blast Furnace System

100‧‧‧First finish

200‧‧‧Second surface

300‧‧‧ noise points

H‧‧‧First material surface curve

G‧‧‧Second surface curve

S1~S3‧‧‧ steps

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart showing a method of measuring the volume of a layer in a blast furnace in accordance with a preferred embodiment of the present invention.

Figure 2 is a side elevational view of a blast furnace and a surface distribution of a preferred embodiment of the present invention.

Figure 3 is a schematic view showing the distribution of point groups measured by the first level in the scanning blast furnace according to a preferred embodiment of the present invention.

Figure 4 is a diagram showing the unreasonable point group filtered out in Figure 3.

Fig. 5 is a schematic diagram showing the curve of the first fitting curve obtained by curve fitting according to the point group of Fig. 3.

Fig. 6 is a schematic diagram showing a curve of a first planer curve and a second planer curve obtained by curve fitting according to a point group obtained by respectively scanning a first material surface and a second material surface.

Figure 7 is a schematic diagram showing the sampling definition for the first level curve and the second level curve of Figure 6.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

For a method for measuring the volume of a layer in a blast furnace according to the present invention, please refer to 1 and 2, FIG. 1 is a flow chart showing a method for measuring the volume of a layer in a blast furnace according to a preferred embodiment of the present invention; and FIG. 2 is a blast furnace according to a preferred embodiment of the present invention. And a side view of the distribution of the material surface. The method for measuring the volume of the layer in the blast furnace is mainly performed by a computer connected to a range finder. The computer is equipped with a blast furnace coordinate system 10 for the center of the blast furnace 1 for a blast furnace 1; the finder (not shown) is installed above the material surface of the blast furnace 1 for The lower surface is scanned two-dimensionally, and the path of the scanning is preferably the diameter of the circumference of the inner wall of the blast furnace 1. The method for measuring the volume of a layer in a blast furnace includes the following steps:

Step S1: scanning a first level 100 in the blast furnace 1 two-dimensionally to obtain a first level curve on the blast furnace coordinate system 10.

Step S2: scanning a second level 200 in the blast furnace 1 two-dimensionally to obtain a second level curve on the blast furnace coordinate system 10.

Step S3: integrating the area between the first level curve and the second level curve around the Y-axis rotation of the blast furnace coordinate system 10, thereby obtaining a relationship between the first material surface 100 and the second material surface 200. Material layer volume.

The step S1 further includes: performing a two-dimensional scan on the first level 100 in the blast furnace 1 by the range finder to obtain a first point group data; filtering out an unreasonable point group in the first point group data; Performing a curve fitting on the remaining point group to obtain a first fitting curve; determining, by the first fitting curve, whether there is a point that is improperly filtered in the previously filtered point group; and re-performing the curve to obtain The first level curve.

Specifically, in the step S1, the range finder scans the surface of a first layer (ie, the first level 100) in two dimensions, and returns the scan result to the computer to obtain several measurements. Point, which constitutes the first point group data on the blast furnace coordinate system, as shown in Figure 3. Since the point group obtained by the foregoing measurement may contain dust or other noise in the blast furnace, and then calculated by computer, sequentially judge the data in the first point group along the X-axis direction, except for the end point (ie, the first one) Any point other than the point and the last point x _1(i) is more than a first valve from the adjacent two points (x _1(i-1) , x _1(i+1) ) The value, if greater than the first threshold value, indicates that the relative position between the point x _1(i) and its adjacent point changes too much, and the point is likely to be non-excessive cusp based on the material plane, which may not belong to The point on the material surface, such as the noise point 300 in Fig. 4, should be classified as an unreasonable point group, so the point x _1(i) is filtered out from the first point group data. Subsequently, the filtered remaining group of points is subjected to the first curve fitting to obtain a first fitting curve, as shown in FIG. In this case, in order to prevent the filtering step from filtering out the point group which may be the material surface, the present embodiment further compares the previously filtered point group with the first fitting curve to determine the filtered point group. Whether the distance from each point to the first fitting curve is less than a second threshold value, and if it is less than the second threshold value, the point is added to the first point group data again. After the first point group data is re-updated, the curve fitting is repeated, and the comparison step of the filtered point group and the fitting curve is repeated until no more points are rejoined, and the final fitting is obtained. The curve is the first plan curve.

After the blast furnace generates a second level after the second cloth (or after the material surface changes due to eating), the above step S2 is performed, which is the same as the step S1, including passing the distance meter Performing a two-dimensional scan on the second level in the blast furnace to obtain a second point group data; filtering out the unreasonable point group in the second point group data; and fitting the remaining point group to the curve to obtain a first a second fitting curve; determining, by the second fitting curve, whether there is a point in the previously filtered point group that is improperly filtered; and re-curving the curve to obtain the second leveling curve. Similarly, when filtering out the unreasonable point group in the second point group data, the step is also to sequentially judge any point x _(i) other than the end point in the second point group data along the X-axis direction. ₎ to its adjacent points _{(x (i-1),} x (i + 1)) formed from the line is greater than a first threshold value, if the first threshold is greater than the first point from the group The point x _(i) is filtered out from the data. And, the step of determining, by the second fitting curve, whether there is a point that is improperly filtered in the previously filtered point group is similar to the flow of the above step S1, determining each point in the filtered point group and the second fitting Whether the distance between the curves is less than a second threshold, and if less than the second threshold, the point is added to the second point group data again. After the second point group data is re-updated, the curve fitting is repeated, and the comparison step of the filtered point group and the fitting curve is repeated until no more points are rejoined, and finally the final fitting is obtained. The curve is the second level curve.

As shown in Fig. 6, at this time, the first level curve H and the second level curve G which are finally fitted by performing the above steps S1 and S2 are displayed on the blast furnace coordinate system.

Finally, in step S3, the first level curve H and the second level curve G are sampled N points on the X-axis coordinate of the blast furnace coordinate system 10, wherein the interval between adjacent points is Δd, the sampling point group on the first level curve is H={h _i }, h _i =(x _i , y _i ), i=1 to N; the sampling point group on the second level curve is G={g _i }, g _i =(x _i , y' _i ), i=1 to N, as shown in Fig. 7; by calculating the relationship between the first level curve and the second level curve The area on each interval Δd, and based on the condition of the cloth symmetry in the blast furnace, the area is rotated around the Y axis of the blast furnace coordinate system 10 (ie, one rotation around the center of the blast furnace), that is, by integrating The unit volume after each interval Δd is wound one week, and then the unit volume obtained by dividing each interval Δd is added to obtain the volume of the layer between the first level 100 and the second level 200, specifically The following equation This is achieved, where V is the layer volume.

In the embodiment, the first threshold is preferably 0.2 meters, and the second threshold is preferably 0.2 meters, but not limited thereto.

In summary, the present invention mainly establishes a two-dimensional curve of two material planes by two-dimensional scanning, and optimizes the curve by filtering noise in the middle to make it close to the actual material surface, and finally passes the two-dimensional curve of the two material surfaces. The sampling integral is used to estimate the volume of the layer in the blast furnace under the condition that the fabric is symmetrical in the blast furnace, which can replace the traditional inefficient measurement method and quickly and accurately measure the volume between the layers.

The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

Claims (9)

A method for measuring the volume of a layer in a blast furnace is performed by a computer connected to a range finder, wherein the computer system has a Y-axis built through a blast furnace coordinate system at the center of a blast furnace; the range finder is installed in Above the level of a blast furnace, the method comprises the steps of: S1: two-dimensionally scanning a first level in the blast furnace to obtain a first level curve on the blast furnace coordinate system, wherein the S1 step comprises : The first point group data is obtained by two-dimensional scanning of the first material surface in the blast furnace by the range finder; the unreasonable point group in the first point group data is filtered out; and the remaining point group is simulated And obtaining a first fitting curve; determining, by the first fitting curve, whether there is a point in the previously filtered point group that is improperly filtered; and re-curving the curve to obtain the first level a curve; S2: two-dimensionally scanning a second level in the blast furnace to obtain a second level curve on the blast furnace coordinate system; and S3: using the first level curve and the second level curve The area between the two is rotated around the Y-axis of the blast furnace coordinate system. In turn, the volume of the layer between the first level and the second level is obtained. The method for measuring a volume of a layer in a blast furnace according to claim 1, wherein the step of filtering out an unreasonable point group in the first point group data is sequentially determined along the X-axis direction. Whether the distance from any point x _1(i) except the endpoint in the first point group data to the line formed by the adjacent two points (x _1(i-1) , x _1(i+1) ) The value is greater than a first threshold, and if greater than the first threshold, the point x _1(i) is filtered from the first point group data. The method for measuring the volume of a layer in a blast furnace according to claim 1, wherein the step of determining, by the first fitting curve, whether there is a point of improper filtering in the previously filtered point group is judged to be Whether the distance from each point in the filtered point group to the first fitting curve is less than a second threshold value, and if it is less than the second threshold value, the point is added to the first point group data again. The method for measuring the volume of a layer in a blast furnace according to claim 1, wherein the step S2 comprises: performing a two-dimensional scan of the second material surface in the blast furnace by the range finder to obtain a second point. Group data; filtering out the unreasonable point group in the second point group data; performing curve fitting on the remaining point group to obtain a second fitting curve; determining the previously filtered point by the second fitting curve Whether there is a point in the group that is improperly filtered; and the curve fitting is repeated to obtain the second level curve. The method for measuring a volume of a layer in a blast furnace according to claim 4, wherein the step of filtering out an unreasonable point group in the second point group data is sequentially determined along the X-axis direction. Whether the distance from any point x _(i) except the endpoint to the line formed by the adjacent two points (x _(i-1) , x _(i+1) ) in the second point group data is greater than one a threshold value, if greater than the first threshold value, filtering the point x _(i) from the first point group data. The method for measuring the volume of a layer in a blast furnace according to claim 4, wherein the step of judging whether there is a point of improper filtering in the previously filtered point group by the second fitting curve is determined. Each point in the point group filtered out and the second fitting curve Whether the distance between the distance is less than a second threshold value, if the second threshold is less than the second threshold value, the point is added to the second point group data again. The method for measuring the volume of a layer in a blast furnace according to the first aspect of the patent application, wherein in the step S3, the first level curve and the second level curve are in the range of the blast furnace coordinate system. N points are sampled on the axis coordinate, wherein the interval between adjacent points is Δd, and the sampling point group on the first plan curve is H={h _i }, h _i =(x _i , y _i ), i=1 to N; the sampling point group on the second level curve is G={g _i }, g _i =(x _i , y' _i ), i=1 to N; and the following equation And further, the volume V of the layer between the first level and the second level is obtained. A method of measuring a volume of a layer in a blast furnace as described in claim 2 or 5, wherein the first threshold is 0.2 meters. A method of measuring a volume of a layer in a blast furnace as described in claim 3 or 6, wherein the second threshold is 0.2 meters.