JP5390902B2 - Profile data search method for blast furnace charge and profile data search apparatus using this method - Google Patents

Description

  The present invention relates to a method for retrieving profile data of a surface profile similar in shape to a specific surface profile from a plurality of profile data stored in a database or the like, and a profile data retrieval apparatus using this method.

  In order to stabilize the operation of the blast furnace, it is important to maintain the shape of the top surface of the deposited layer of the charge, that is, the surface profile in an appropriate shape. For that purpose, after grasping the current surface profile in the blast furnace in operation, the operating conditions and charging method of the blast furnace are changed so that the surface profile has an appropriate shape.

  A measuring device is used for grasping the surface profile in the blast furnace. As this measuring apparatus, there exists a thing of patent document 1, for example. In this measuring device, the reflection of microwaves is used, and the height of the surface profile (depth from the microwave irradiation position) is measured at a constant pitch along a specific furnace radius. A top surface profile is obtained.

  Specifically, each measurement value obtained by measuring at a constant pitch along the specific furnace radius on the upper surface of the deposit layer of the charge is the Y axis as the furnace center axis, and the furnace radius at the predetermined position. Plotted as X axis. By connecting the plotted points, a surface profile of the charge along the radius at the predetermined location of the furnace radius is obtained. By rotating this shape once so that the furnace center axis (Y axis) is the center of rotation, the surface profile of the charge deposit layer can be obtained.

  As described above, the operating conditions and the charging method of the blast furnace are changed based on the current surface profile obtained by the measurement by the measuring device, whereby the surface profile is maintained in an appropriate shape and the operation of the blast furnace is stabilized.

JP 2002-115008 A

  When examining how to change the above-described operation conditions and the like, the past operation results may be referred to. For example, refer to the operation results when operating with the surface profile of the shape approximated to the current surface profile, or when operating with the surface profile of the shape approximated to the surface profile of the target shape after the change The operation results are used as a reference.

  The operation results, etc. that are used as a reference when considering changes to these operating conditions are usually stored in the database together with the profile data (shape data) of the surface profile, so the surface is similar to the surface profile of the search target. It is found by finding profile data of the profile.

  The accumulated profile data can be easily searched using the date and time as a clue if the measurement date and time is known. For example, the profile data of the target surface profile is searched based on the shape of the surface profile. It was difficult to do.

  This is due to the fact that, as described above, the surface profile is specified by measuring the profile depth from a certain height of the furnace top along a specific furnace radius. Based on such measurements, the accumulated many profile data are data including the position in the furnace radial direction and the height position, respectively. Therefore, even if the shape of the surface profile itself is similar, If the height position in the furnace on the upper surface of the deposited layer is different, it is recognized as dissimilar data.

  Therefore, in view of the above problems, the present invention provides a profile data search method capable of easily searching for profile data of a layer upper surface shape similar in shape to a specific layer upper surface shape from a plurality of profile data, and this method. It is an object of the present invention to provide a used profile data search device.

  Therefore, in order to solve the above-described problems, the present invention provides a layer top surface shape similar to a specific layer top surface shape from among a plurality of profile data, which is data of a layer top surface shape in a charge accumulation layer stacked in a blast furnace. A method of searching for profile data of a measurement method, wherein a measurement step of measuring the specific layer upper surface shape along a specific furnace radius, and profile data of the specific layer upper surface shape obtained in the measurement step The specific profile data and each profile data of the plurality of profile data are compared to calculate a difference value, which is a value that is an index of the degree of similarity between the top surfaces of the pair of charge deposit layers indicated by both profile data. The difference calculation step and each difference value calculated in the difference calculation step are compared, and a predetermined number of the difference values are selected in ascending order. Extracting the profile data used at the time of the extraction from the plurality of profile data, and the difference calculating step is based on the specific profile data obtained in the measuring step. A height level deriving step for deriving a value representing a height position in the furnace on the upper surface of the charge deposit layer, and selecting one profile data from the plurality of profile data, and the selected profile data is The value representing the height position in the furnace of the upper surface of the charge deposit layer having the shape of the upper surface of the layer to be shown matches the value representing the height position of the specific profile data derived in the height level deriving step. In addition, the upper surface of the charge deposit layer having the shape of the upper surface of the layer while maintaining the shape of the upper surface of the layer indicated by the profile data of at least one of the profile data At a plurality of specific positions lined up from the furnace center to the furnace wall along the specific furnace radius on the upper surface of the pair of charge accumulation layers indicated by the two profile data after the correction, and a correction process for correcting up and down. Calculating a distance between the upper surfaces of the pair of charged material accumulation layers and calculating a sum of distance values at each of these specific positions as the difference value, the correction step and the calculation step, Is performed for each profile data of the plurality of profile data.

  According to this search method, even if the plurality of profile data are profile data of the upper surface of the charge deposit layer having different height positions in the furnace, a specific layer upper surface shape is selected from the plurality of profile data. The profile data of the layer upper surface shape similar to can be searched with high accuracy.

  That is, according to the search method, the charge deposit layer upper surface having the specific layer upper surface shape indicated by the specific profile data by the correction, and the charge deposit layer upper surface having the layer upper surface shape indicated by the selected profile data, By comparing the shapes of the upper surfaces of the pair of charge deposit layers indicated by the two profile data after correction after the height positions of the two are matched, the pair of charge deposit layers indicated by the two profile data before correction is compared. Regardless of the height position of the upper surface in the furnace, it is possible to accurately evaluate the degree of similarity between the shapes of the upper surfaces of the charge accumulation layer (that is, the shape of the upper surface of the layer).

  In addition, the difference value, which is a value indicating the degree of similarity between the top surfaces of the pair of charge accumulation layers indicated by the two profile data, is specified on the top surfaces of the pair of charge deposit layers indicated by the two profile data after correction. The distance between the upper surfaces of the pair of charged deposits at a plurality of specific positions arranged from the furnace center to the furnace wall along the furnace radius is respectively obtained and expressed as the sum of the distance values at these specific positions. Because the degree of similarity compares the degree of similarity between the specific layer upper surface shape and the layer upper surface shape indicated by each profile data, the degree of similarity can be easily and reliably determined. Therefore, by calculating the difference value for each profile data and selecting in order from the smallest value, the profile data of the layer top surface shape similar to the specific layer top surface shape can be easily selected from a plurality of profile data in the similar order. Can be extracted.

  In the blast furnace profile data search method according to the present invention, the value representing the height position in the furnace of the upper surface of the charge deposit layer in the height level deriving step and the correcting step is the upper surface of the charge deposit layer. The average value of the height from the furnace center to the furnace wall at a position along the specific furnace radius is preferable.

  By using the average value of the height from the furnace center to the furnace wall at the furnace radius as the value representing the height position in this way, the height position is represented from the profile data which is the shape data of the upper surface of the charge deposit layer. The value can be easily derived.

  In the step of deriving the height level, an estimated shape line that simulates a layer upper surface shape at a position along the specific furnace radius of the specific charge deposition layer upper surface as a line having a curve is based on the specific profile data. A first shape line deriving step to derive, and a step of deriving a value representing the height position based on the estimated shape line derived in the first shape line deriving step. In the derivation step, a continuous function including an undetermined coefficient for defining the estimated shape line is prepared in advance, and the coefficient of the continuous function is calculated based on the specific profile data obtained in the measurement step. It is preferable that the estimated shape line is derived by doing so. In the present invention, the “estimated shape line” means a finite length line having both ends.

  According to such a configuration, even if noise is included in the specific profile data obtained by measuring the specific shape of the upper surface of the specific layer, the specific furnace radius of the upper surface of the specific charge accumulation layer is determined based on the specific profile data. The influence of noise in the specific profile data is suppressed by imitating the layer upper surface shape at a position along the line with an estimated shape line as a line having a curve, and a plurality of profile data of the layer upper surface shape similar to the specific layer upper surface shape are suppressed. It is possible to accurately extract from the profile data.

  That is, regardless of the magnitude or amount of noise included in the specific profile data, an estimated shape line as a line having a curve is derived based on the specific profile data, and a specific layer top surface shape is obtained at the specific furnace radius. By being simulated by the estimated shape line, even if there is a partial protrusion (noise) that happens to occur on the upper surface of the measured specific deposit layer, the effect is suppressed and a specific layer with high accuracy An upper surface shape is obtained. As a result, the accuracy in extracting the profile data of the layer upper surface shape similar to the specific layer upper surface shape from the plurality of profile data is improved.

  Further, the correction step further includes, based on the selected profile data, an estimated shape line that simulates a layer upper surface shape at a position along the specific furnace radius of the charge deposition layer upper surface as a line having a curve. A second shape line deriving step for deriving, and at least one of the profile data is set so that a value representing the height position of the selected profile data matches a value representing the height position of the specific profile data. Deriving a value representing the height position based on the estimated shape line derived in the second shape line deriving step before correction, and in the second shape line deriving step, the estimation Preparing a continuous function including an undetermined coefficient for defining a shape line in advance, and calculating a coefficient of the continuous function based on the selected profile data More preferably the estimated shape line is derived by.

  According to this configuration, based on the selected profile data, the layer top surface shape at a position along the specific furnace radius on the top surface of the charge deposit layer indicated by the selected profile data is simulated by the estimated shape line as a curved line. By doing so, the influence of noise in the selected profile data is suppressed. Therefore, in the comparison between the specific layer upper surface shape indicated by the specific profile data and the layer upper surface shape indicated by each profile data, the influence of noise included in both profile data is suppressed, and thereby a pair of layer upper surface shapes indicated by both profile data The degree of similarity between each other can be evaluated more accurately. Thereby, the precision at the time of extracting the profile data of the layer upper surface shape similar to a specific layer upper surface shape from several profile data improves more.

  Each continuous function in the first and second shape line derivation steps is defined by a series of section functions defined for a plurality of sections partitioned along the specific furnace radius. The interval function of the seed is set such that the coefficient and the range in the direction along the specific furnace radius are undecided and are continuous at the boundary between adjacent interval functions, and the specific profile data or the selected profile data is Preferably, the estimated shape line is derived by calculating the coefficients in all interval functions and the range in the specific furnace radial direction.

  According to such a configuration, the continuous function is divided into a plurality of sections, and a section function that defines a line segment that conforms to the shape of the top surface of the layer is set for each of the plurality of sections. An estimated shape line approximating the shape of the upper surface of the deposited layer and the upper surface of the charge deposited layer indicated by the selected profile data can be obtained. As a result, the accuracy in extracting the profile data of the layer upper surface shape similar to the specific layer upper surface shape from the plurality of profile data is further improved.

  Specifically, the interval function is a function represented on an xy plane with a furnace center axis as a y-axis and the specific furnace radius as an x-axis, and the continuous function is defined by four interval functions, These four interval functions are a first linear function, a first curve function, a second linear function, and a second curve function that are arranged in order from the furnace wall toward the furnace center, and the first linear function. The function is a function in which a line defined by the function is located in the vicinity of the furnace wall and becomes a horizontal or substantially horizontal straight line, and the second linear function is a function in which the line defined by the function is the first Is a function that is located on the furnace center side of the linear function and becomes a straight line having a constant downward slope toward the furnace center, and the first curve function is such that a line defined by the function is the first linear function. Located between the function and the second linear function and defined as the first linear function A function that is a curve that smoothly connects the furnace center side end portion of the substantially horizontal straight line and the furnace wall side end portion of the downward slope straight line defined by the second linear function, The function is preferably a function in which a line defined by the function is located at the center of the furnace and forms a curve that bulges upward.

  By defining the estimated shape line by connecting such a small number of interval functions, it becomes easy to calculate the coefficient in each interval function based on the specific profile data or the selected profile data and the range in the specific furnace radial direction. The derivation of the estimated shape line is facilitated.

  In addition, the estimated shape line defined by the continuous number of interval functions has a shape that matches the shape of the upper surface of the charge accumulation layer. That is, the estimated shape line is defined by a line in which lines defined by the first linear function, the first curve function, the second linear function, and the second curve function are connected in series. An estimated shape line having a shape corresponding to the shape of the upper surface of the deposit layer can be obtained.

  Specifically, normally, when the charge is charged into the blast furnace in the operation of the blast furnace, it is necessary to adjust the top surface shape of the charge accumulation layer in order to stably maintain the operation of the blast furnace. The charging equipment is charged while changing the drop position along the radial direction of the blast furnace with the charging equipment, and charging is performed so that the charged material is built up at the center of the furnace (central charging). Is done. Therefore, in any blast furnace in operation, if the top surface shape of a layer at a position along a specific furnace radius is simulated by a line having a curve (estimated shape line) in any layer top surface shape, , A horizontal or substantially horizontal straight line portion (line defined by the first linear function) in the vicinity of the furnace wall, and an inclined portion that is located on the furnace center side of this straight line portion and has a constant downward slope toward the furnace center There is a tendency to appear (a line defined by the second linear function) and a curve portion (a line defined by the second curve function) that bulges upward in the center of the furnace. Further, since the layer top surface shape is continuous from the furnace wall to the furnace center along the specific furnace radius, the horizontal or substantially horizontal straight line portion in the vicinity of the furnace wall and the inclined portion having a constant downward gradient are continuous. Thus, they are connected by a curved portion (a line defined by the first curved function). Therefore, the estimated shape line is simply a series of simple shape lines (lines defined by the first linear function, the first curve function, the second linear function, and the second curve function, respectively) in series. In spite of the shape, the shape conforms to the shape of the upper surface of the charge deposit layer at a specific furnace radius.

  Since the estimated shape line derived in this way is a shape that conforms to the layer top surface shape and noise contained in the profile data is suppressed, a plurality of profile data of the layer top surface shape similar to the specific layer top surface shape are obtained. The accuracy when extracting from the profile data is improved.

  The continuous function is preferably a function represented on an xy plane in which the furnace central axis is the y-axis and the specific furnace radius is the x-axis. By doing in this way, each function which prescribes | regulates a continuous function is represented in the form of y = f (x), and handling of each said function becomes easy.

Further, the first curve function or the second curve function is a function having a constant angle change rate with respect to a position in the x-axis direction at an angle formed by a tangent line of the curve defined by the curve function and the x-axis. Is preferred. Specifically, the first curve function or the second curve function is preferably a function represented by the following expression (1) or (2).
y = (− 1 / a) · log | cos (ax + b) | + c (1)
y = αx ² + βx + γ (2)
Here, a, b, c, α, β, and γ are coefficients.

  Thus, since the first curve function or the second curve function is a simple function and has a small number of coefficients, the coefficient of each function based on the measured value and the range in the x-axis direction, that is, the furnace radius at the predetermined position The calculation of the range is also easier. Therefore, it is easy to calculate the coefficient of each function and the range in the x-axis direction based on the measured value of the surface profile, and it is easy to derive the estimated shape line.

  Further, in order to solve the above-mentioned problems, the present invention provides a layer upper surface shape similar to a specific layer upper surface shape among a plurality of profile data which is data of the layer upper surface shape in the charge accumulation layer laminated in the blast furnace. A data storage means for preliminarily storing the plurality of profile data, each profile data stored in the data storage means, and profile data of the specific layer upper surface shape. A difference calculating means for calculating and storing a difference value as an index of the degree of similarity between the shapes of the top surfaces of the pair of charge accumulation layers indicated by both profile data by comparing with specific profile data; This is used when the difference values stored in the difference calculation means are compared, a predetermined number of the difference values are selected in ascending order, and the selected difference value is calculated. Extraction means for extracting the profile data from the plurality of profile data, and output means for outputting the profile data extracted by the extraction means to the outside, wherein the difference calculation means has a specific furnace radius. A value representing the height position in the furnace of the upper surface of the deposit layer having the specific layer upper surface shape based on the specific profile data obtained by measuring the specific upper surface shape of the layer Height level deriving means to be stored, and one profile data selected from a plurality of profile data stored in the data storage means, and the deposit accumulation having the layer upper surface shape indicated by the selected profile data A value representing the height position of the upper surface of the layer in the furnace and before the specific profile data derived and stored by the height level deriving means Correction so that the upper surface of the charge deposit layer having the upper surface shape of the layer is moved up and down while maintaining the shape of the upper surface shape of the layer indicated by the profile data so that the value representing the height position matches. A correction means for storing both of the corrected profile data, and a furnace along the specific furnace radius on the upper surface of the pair of charge deposit layers indicated by the corrected profile data stored in the correction means. The distance between the upper surfaces of the pair of charge accumulation layers at a plurality of specific positions arranged from the center to the furnace wall is obtained, and the sum of the distance values at each of the specific positions is calculated and stored as the difference value. Calculating means, and the correction means and the calculation means respectively calculate and store the difference values between the profile data and the specific profile data.

  According to this search device, even if the plurality of profile data stored in the data storage means are profile data on the upper surface of the charge deposit layer having different height positions in the furnace, specific data are specified from the data storage means. The profile data of the layer upper surface shape similar to the layer upper surface shape can be searched and output with high accuracy.

  In other words, the difference calculating means has a height difference between the upper surface of the deposit layer having the upper surface shape indicated by the specific profile data and the upper surface of the deposit layer having the upper surface shape indicated by the profile data selected from the data storage means. By comparing the shapes of the upper surfaces of the pair of charge deposit layers indicated by the two profile data after correction after the positions are adjusted, the furnaces for the upper surfaces of the pair of charge deposit layers indicated by the two profile data before correction are compared. Regardless of the height position, the degree of similarity between the shapes of the top surfaces of the charge deposit layers (that is, the shape of the top surface of the layers) can be evaluated with high accuracy.

  In addition, the difference value, which is an index of the degree of similarity between the top surfaces of the pair of charge deposit layers indicated by the two profile data, is the above-described difference between the top surfaces of the pair of charge deposit layers indicated by the two profile data. The distance between the top surfaces of the pair of charge deposits at a plurality of specific positions arranged from the furnace center to the furnace wall along a specific furnace radius is calculated and expressed as the sum of the distance values at these specific positions. The degree of similarity between the specific shape of the upper surface of the layer and the shape of the upper surface of the layer indicated by each profile data is compared depending on the size, so that the degree of similarity can be determined easily and reliably. Therefore, by calculating the difference value for each profile data and selecting in order from the smallest value, the profile data of the layer top surface shape similar to the specific layer top surface shape can be easily selected from a plurality of profile data in the similar order. Can be extracted.

  Further, by outputting the profile data extracted by the extraction means by the output means, it becomes possible for a worker or the like who operates the blast furnace to obtain target profile data quickly and accurately.

  The storage means may store a value representing the height position of each profile data derived in advance together with corresponding profile data.

  According to such a configuration, when the correction unit performs correction to match the value representing the height position between the specific profile data and the selected profile data, a value representing the height position of the selected profile data is derived. Therefore, the search speed in the search device can be improved.

  The blast furnace charge profile data search device measures the shape of the upper surface of the specific charge deposit layer at the furnace radius at the predetermined position, and the measurement value obtained by this measurement is used as the height. Measurement means for transmitting to the level deriving means may further be provided.

  As described above, according to the present invention, a profile data search method capable of easily searching for profile data of a layer upper surface shape similar in shape to a specific layer upper surface shape from a plurality of profile data, and a profile using this method A data retrieval apparatus can be provided.

It is a block diagram of the profile data search device of a blast furnace charge concerning this embodiment. It is the schematic of the measurement means of the said profile data search device concerning the embodiment. It is a figure which shows the continuous function and its interval function in the said profile data search device which concerns on the same embodiment. It is a figure which shows the flow of operation | movement in the said profile data search device which concerns on the same embodiment. It is a figure which shows the profile data obtained by measuring with the said measurement means which concerns on the same embodiment, Comprising: (a) is the figure which plotted specific profile data to XY coordinate, (b) derived the estimated shape line It is a figure which shows a back state. It is a figure which shows the selection profile data selected from the database of the said profile data search apparatus which concerns on the embodiment, Comprising: (a) is the figure which plotted selection profile data on XY coordinate, (b) is an estimated shape line. It is a figure which shows the state after derivation | leading-out. The profile data after correction by the correction means of the profile data search device, (a) is a diagram showing specific profile data after correction, (b) is a diagram showing selected profile data after correction. . It is a figure which shows the state which is comparing the layer upper surface shape which both profile data after the said correction | amendment show. (A) is a figure which shows both profile data shown by Fig.5 (a) and Fig.6 (a), (b) shows both profile data after the said correction | amendment, without deriving an estimated shape line. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  A blast furnace charge profile data search device (hereinafter also simply referred to as “search device”) is a plurality of profile data that is data of a surface profile (layer upper surface shape) in a charge accumulation layer stacked in a blast furnace. Is used to search for profile data of a surface profile similar to a specific surface profile.

  Specifically, as illustrated in FIG. 1, the search device 10 includes a measurement unit 11, a database (data storage unit) 12, a difference calculation unit 13, an extraction unit 14, and an output unit 15.

  The measuring means 11 measures a surface profile along a specific furnace radius, and transmits (transmits) a measurement value obtained by this measurement as profile data to the difference calculating means 13 as an output signal. The measuring means 11 is configured to be able to transmit the profile data to the database 12 by an output signal. A so-called microwave profile meter is used as the measuring means 11 of the present embodiment. As shown in FIG. 2, the measuring means 11 has a measuring rod 11a inserted from the outside of the furnace so as to penetrate the furnace wall, and a measuring portion 11b is provided at the tip thereof. And the measurement part 11b of this measurement rod 11a front-end | tip reciprocates along the specific furnace radius of a blast furnace, and based on the reflected wave of the microwave irradiated from the front-end | tip (measurement part) 11b, a charge deposit layer upper surface The height in the furnace (profile depth) is measured. This measuring means 11 is provided in the search device 10 in the present embodiment. For example, when a microwave profile meter is already provided in the blast furnace, this is used as the measuring means 11 of the search device 10. May be. In the present embodiment, the specific furnace radius refers to a furnace radius along a path along which the measuring unit 11b of the measuring unit 11 reciprocates when measuring the surface profile.

  The database 12 stores a plurality of profile data. The database 12 accumulates (stores) profile data obtained by measuring the surface profile by the measurement unit 11 by receiving an output signal from the measurement unit 11. Each profile data stored in the database 12 is data of measurement values obtained by actually measuring the surface profile of the upper surface of the charge deposit layer in the blast furnace being operated by the measurement means 11. This profile data is stored in the database 12 together with data such as operating conditions and operating results of the blast furnace when the profile data is measured. The database 12 of this embodiment stores 600 profile data.

  The difference calculation means 13 compares each profile data stored in the database 12 with the profile data (specific profile data) R of a specific surface profile, and compares the upper surface of the pair of charge deposit layers indicated by both profile data. A difference value E, which is a value serving as an index of the similarity between shapes, is calculated and stored. The difference calculating unit 13 includes a height level deriving unit 20, a correcting unit 30, a calculating unit 40, and a storing unit 41.

  The height level deriving means 20 is also referred to as a value (hereinafter also simply referred to as “height value”) representing the height position in the furnace of the upper surface of the deposit layer having the specific surface profile based on the specific profile data R. ) Is derived and stored, and includes a first shape line deriving unit 21 and a first height value deriving unit 22. In the present embodiment, the average value of the height from the furnace center to the furnace wall at a position along the specific furnace radius on the upper surface of the charge deposit layer is used as the height value. In this way, by using the average value as the height value, the height value can be easily derived from the profile data that is the shape data of the top surface of the charge deposit layer.

  The first shape line deriving unit 21 is a part that derives the estimated shape line 50 based on the specific profile data R, and includes a first function storage unit 23 and a first coefficient calculation unit 24. The estimated shape line 50 simulates the surface profile at a position along a specific furnace radius on the upper surface of a specific charge deposition layer as a line having a curve (see FIG. 3).

  The first function storage unit 23 stores the continuous function F. This continuous function F is a function for defining an estimated shape line 50 (see FIG. 3) for imitating the surface profile at a position along a specific furnace radius on the upper surface of a specific charge deposition layer. The estimated shape line 50 is defined as a single line having a curve. In the present embodiment, a single line is composed of a straight line part and a curved line part, and is a line that is continuous at the connection position of each part (for example, the straight line part and the curved line part). .

  This continuous function F is obtained as a result of analyzing a lot of surface profile data such as past actual data, and the actual data includes a drop position in the furnace radial direction in the vicinity of the furnace wall. However, what is premised on the operation state in which the charged material is charged and the charged material is centrally charged so that the charged material is elevated in the center of the furnace is used. Specifically, in any of the above-mentioned blast furnaces in the operating state, the surface profile at a position along a specific furnace radius on the upper surface of the charge accumulation layer is a line having a curve (estimated shape line). When imitated, in this line, a horizontal or substantially horizontal straight line part near the furnace wall, an inclined part that is located on the furnace center side of this straight line part and has a constant downward slope toward the furnace center, It is a function set by paying attention to the fact that a curved portion that bulges upward appears at the center of the furnace.

  The continuous function F set in this way is a function represented on the XY plane with the furnace center axis as the Y axis and a specific furnace radius as the X axis. The estimated shape line 50 defined by the continuous function F is 3, the straight line portion 52, the inclined portion 54, the connecting curve portion 53 that smoothly connects the straight portion 52 and the inclined portion 54, and the central curve portion 55 are included. Here, the straight line portion 52 is a portion that is located in the vicinity of the furnace wall of the line (estimated shape line) 50 defined by the continuous function F and is a horizontal or substantially horizontal straight line. Is a portion located on the furnace center side of the straight line portion 52 of the line 50 defined by the continuous function F and is a straight line having a constant downward slope toward the furnace center. Of the line 50 defined by the continuous function F, it is located between the straight portion 52 and the inclined portion 54, and the furnace center side end portion (the left end portion in FIG. 3) of the straight portion 52 and the furnace portion of the inclined portion 54. It is a part that forms a curve that smoothly connects the wall side end (right end in FIG. 3), and the center curve 55 is located at the furnace center of the line 50 defined by the continuous function F. And it is a site | part used as the curve which bulges upwards. The gradient and length of the straight portion 52, the gradient and length of the inclined portion 54, the shape of the connection curve portion 53, the shape of the central curve portion 55, etc. are not determined because they differ for each surface profile. 11, the coefficient of the continuous function F is calculated based on a plurality of measured values obtained by measuring a specific surface profile (ie, specific profile data R). The gradient and length of the inclined portion 54, the shape of the connection curve portion 53, the shape of the center curve portion 55, and the like are respectively determined, and the estimated shape line 50 in accordance with the actual surface profile can be obtained.

Specifically, the continuous function F is defined by a plurality of types of functions connected along the X-axis direction. These plural types of functions are set such that the coefficient and the range in the X-axis direction are undecided and are continuous at the boundary between adjacent functions. In the present embodiment, the continuous function F is a first linear function F ₁₁ , a first curve function F ₂₁ , and a second linear function F ₁₂ that are arranged in order from the furnace wall toward the furnace center along the X axis. It is defined, and the second curve function F _22. Each function excluding the second curve function F _22, that is, the first linear function F ₁₁ , the first curve function F _21, and the second linear function F ₁₂ can be differentiated at the respective boundary positions r 1 and r 2. Functions are connected so that

The first linear function F ₁₁ is a function in which the line defined by the function F ₁₁ is a straight line corresponding to the straight line portion 52 of the estimated shape line 50, and the first curve function F ₂₁ is the function F _21. Is a function corresponding to the connection curve portion 53 of the estimated shape line 50, and the second linear function F ₁₂ is a slope of the estimated shape line 50 where the line defined by the function F ₁₂ is The second curve function F ₂₂ is a function in which a line defined by the function F ₂₂ becomes a curve corresponding to the central curve portion 55 of the estimated shape line 50.

Each function _{F 11, F 12, F 21} , when showing the _{F 22} more specifically, the first linear function _{F 11} is
F ₁₁ (x) = a ₁ x + b ₁ (10)
And the second linear function F ₁₂ is
F ₁₂ (x) = a ₃ x + b ₃ (12)
It is represented by The first curve function F ₂₁ is
F ₂₁ (x) = (− 1 / a) · log | cos (ax + b) | + c
(11)
And the second curve function F ₂₂ is
F ₂₂ (x) = αx ² + βx + γ (13)
It is represented by

Note that a, a ₁ , a ₃ , b, b ₁ , b ₃ , c, α, β, and γ are coefficients. In the following, as shown in FIG. 3, at a specific furnace radius (X axis), the boundary position between the straight line portion 52 and the connection curve portion 53 is r1, and the boundary position between the connection curve portion 53 and the inclined portion 54 is r2. The boundary position between the inclined portion 54 and the central curved portion 55 is r3. Further, a range of X ≧ r1 is a first section, a range of r2 ≦ X <r1 is a second section, a range of r3 ≦ X <r2 is a third section, and X <r3 is a fourth section.

  The first linear function F11, the first curve function F21, the second linear function F12, and the second curve function F22 as described above are sequentially arranged along the X axis from the furnace wall toward the furnace center side. More specifically, the function F is the following function.

  In order to smoothly connect the straight line portion 52 of the first section and the connection curve section 53 of the second section, at these boundaries X = r1, the straight section 52 and the connection curve section 53 are continuous, Since the slope and the differential value of the curved portion 53 are equal, the following conditional expression is satisfied.

a ₁ r1 + b ₁ = F ₂₁ (r1) (21)
a ₁ = F ′ ₂₁ (r1) (22)
From these formulas (21) and (22), a ₁ = F ′ ₂₁ (r1) (23)
b ₁ = −F ′ ₂₁ (r1) r1 + F ₂₁ (r1) (24)
When these equations (23) and (24) are substituted into equation (10), the first linear function F ₁₁ defining the straight line portion 52 of the first section is
F ₁₁ (x) = F ′ ₂₁ (r1) x−F ′ ₂₁ (r1) r1 + F ₂₁ (r1)
(25)
It becomes.

Similarly, since the connecting curved portion 53 of the second section and the inclined portion 54 of the third section is smoothly connected to the boundary X = r2, a second linear function F ₁₂ which defines an inclined portion 54 of the third section,
F ₁₂ (x) = a ₃ r 2 + b ₃
= F ′ ₂₁ (r2) x−F ′ ₂₁ (r2) r2 + F ₂₁ (r2)
(26)
It becomes.

Further, since the central curve portion 55 of the fourth section is connected to the slope portion 54 of the third section at the boundary X = r3, the second curve function F that defines the central curve portion 55 is connected. ₂₂
F ₂₂ (r3) = a ₃ r3 + b ₃
= F ′ ₂₁ (r2) r3−F ′ ₂₁ (r2) r2 + F ₂₁ (r2)
(27)
Need to be satisfied.

Here, since the first curve function F ₂₁ defining the connection curve portion 53 of the second section is the equation (11), this differentiation is
F ′ ₂₁ (x) = tan (ax + b) (28)
It becomes.

By substituting Equation (28) and Equation (11) into Equation (25), the first linear function F ₁₁ defining the straight line portion 52 of the first section is
F ₁₁ (x) = tan (a · r1 + b) x−tan (a · r1 + b) r1
− (1 / a) · log | cos (a · r1 + b) | + c
(29)
It becomes. Further, by substituting Equation (28) and Equation (11) into Equation (26), the second linear function F ₁₂ that defines the inclined portion 54 of the third section is:
F ₁₂ (x) = tan (a · r2 + b) x−tan (a · r2 + b) r2
− (1 / a) · log | cos (a · r2 + b) | + c
(30)
It becomes.

The function that defines the central curve portion 55 of the fourth section is Equation (13), but due to the restriction of Equation (27), γ is
γ = −α (r3) ² −β · r3 + tan (a · r2 + b) r3
-Tan (a.r2 + b) r2- (1 / a) .log | cos (a.r2 + b) | + c (31)
It becomes.

Therefore, equation (13) becomes
F ₂₂ (x) = αx ² + βx−α (r3) ² −β · r3
+ Tan (a · r2 + b) (r3-r2)
-(1 / a) · log | cos (a · r2 + b) | + c (32)
It becomes.

In summary, the continuous function F is expressed as follows in the first section (x ≧ r1).
F (x) = tan (a · r1 + b) −tan (a · r1 + b) r1
-(1 / a) · log | cos (a · r1 + b) | + c (29)
In the second section (r2 ≦ x <r1)
F (x) = (− 1 / a) · log | cos (ax + b) | + c (11)
In the third section (r3 ≦ x <r2),
F (x) = tan (a · r2 + b) x−tan (a · r2 + b) r2
-(1 / a) · log | cos (a · r2 + b) | + c (30)
In the fourth section (x <r3)
F (x) = αx ² + βx−α (r3) ² −β · r3
+ Tan (a · r2 + b) (r3-r2)
-(1 / a) · log | cos (a · r2 + b) | + c (32)
It becomes.

  The first coefficient calculation unit 24 calculates a coefficient of the continuous function F stored in the first function storage unit 23 based on the specific profile data R sent from the measurement unit 11, and substitutes the calculated coefficient. This is a part for storing the line defined by the continuous function F as the estimated shape line 50.

The calculation of the coefficient of the continuous function F in the present embodiment is the coefficient of each interval function F ₁₁ , F ₂₁ , F ₁₂ , F ₂₂ that defines the continuous function F and each interval function F ₁₁ , F ₂₁ , F ₁₂ , This means obtaining the range of F _{22 in} the X-axis direction. Specifically, the first coefficient calculation unit 24 has a continuous function F in which the above formula (29), formula (11), formula (30), and formula (32) are linked along the X axis as a specific profile. The value of each parameter (r1, r2, r3, a, b, c, α, β, γ) is determined so as to best match the data. In the present embodiment, the parameters are determined by the steepest descent method.

  The first height value deriving unit 22 is a part that derives and stores a height value based on the estimated shape line 50 calculated (derived) by the first coefficient calculating unit 24 and stored. Specifically, the first height value deriving unit 22 calculates the average value of the height from the furnace center to the furnace wall of the estimated shape line 50 calculated by the first coefficient calculating unit 24 to thereby obtain the specific profile data. The height value of the upper surface of the specific charged object stack indicated by R is calculated. That is, since the height value is an average value of the height from the furnace center to the furnace wall of the surface profile at a position along the specific furnace radius on the upper surface of the charge deposit layer, the height value is along the specific furnace radius. The height value is calculated by calculating the average value of the height from the furnace center to the furnace wall of the estimated shape line 50 that simulates the surface profile at the position.

  The correction means 30 selects and obtains one profile data from among a plurality of profile data stored in the database 12, and the deposit layer having the surface profile indicated by the selected profile data (selected profile data) A is obtained. At least one of the height value of the upper surface and the height value of the specific profile data R derived and stored by the height level deriving means 20 (specifically, the first height value deriving unit 22) is matched. Means for maintaining the shape of the surface profile indicated by the profile data in such a manner that the upper surface of the deposit layer having the surface profile is moved up and down, and storing the corrected profile data R1, A1 It is. The correction unit 30 includes a second shape line deriving unit 31, a second height value deriving unit 32, and a correction execution unit 35.

  The second shape line deriving unit 31 is a part that derives the estimated shape line 150 based on the selection profile data A, and includes a second function storage unit 33 and a second coefficient calculation unit 34. Similar to the estimated shape line 50 derived by the first shape line deriving unit 21, the estimated shape line 150 simulates the surface profile at a position along a specific furnace radius on the upper surface of the charge deposit layer as a line having a curve. (See FIG. 6B).

  The second function storage unit 33 stores the continuous function F. This continuous function F is the same function as the continuous function F stored in the first function storage unit 23. The second coefficient calculation unit 34 calculates the coefficient of the continuous function F stored in the second function storage unit 33 based on the selected profile data A acquired from the database 12, similarly to the first coefficient calculation unit 24. This is a part for storing the line defined by the continuous function F into which the calculated coefficient is substituted as the estimated shape line 150.

  The second height value deriving unit 32 derives a height value, similar to the first height value deriving unit 22, based on the estimated shape line 150 calculated (derived) by the second coefficient calculating unit 34 and stored. It is a part to store.

  Based on the height values stored in the first and second height value deriving units 22 and 32, the correction execution unit 35 sets the specific profile data R and the selected profile data A so that the height values match each other. At least one of the corrections is performed, and the corrected profile data R1, A1 are stored. In this embodiment, both profile data R and A are set so that the height values of both profile data coincide with the reference height position value (profile depth 0 mm in FIG. 8) preset in the furnace. Correct each one. Note that the correction execution unit 35 may be configured to correct only the specific profile data R, or correct only the selected profile data A to match each other's height values.

  The calculation means 40 calculates and stores the difference value E between the two profile data R1, A1 after correction stored in the correction means 30 (specifically, the correction execution unit 35). Specifically, the calculation means 40 is arranged from the furnace center to the furnace wall along a specific furnace radius on the upper surface of the pair of charge accumulation layers indicated by the corrected profile data R1, A1 stored in the correction means 30. A distance between the upper surfaces of the pair of charged material accumulation layers at a plurality of specific positions is obtained, and a difference value E that is a value obtained by summing the distance values at the specific positions is calculated. In the present embodiment, the specific position is a position at which the height (profile depth) of the upper surface of the charge deposit layer is actually measured in order to obtain profile data by the measuring means 11, and along the specific furnace radius. They are lined up at 10 cm intervals from the furnace wall inner surface toward the furnace center. As the number of specific positions increases, the similarity of the shapes of the upper surfaces of the pair of charge deposit layers indicated by the two profile data can be more accurately evaluated.

  The storage means 41 is connected to the calculation means 40 and stores each difference value E between each profile data calculated by the correction means 30 and the calculation means 40 and the specific profile data. In this embodiment, the selection profile data A used when calculating the difference value E can be stored together with the difference value E.

  The extraction unit 14 compares the difference values E stored in the difference calculation unit 13 (specifically, the storage unit 41), selects a predetermined number of difference values E in ascending order, and calculates the selected difference value E. The profile data used sometimes is extracted from a plurality of profile data. The extraction unit 14 outputs the extracted profile data to the output unit 15 as an output signal. In the present embodiment, the extracting unit 14 extracts five profile data in order from the smallest difference value E. In addition, the extraction means 14 may be comprised so that the number of the profile data to extract may be changed, and may be comprised so that only a fixed number may be always extracted.

  The output means 15 is for receiving the output signal transmitted from the extraction means 14 and outputting it to the outside. In the present embodiment, a CRT display is used as the output means 15. However, the present invention is not limited to this, and other display means such as an FPD may be used, or a printing means or the like may be used. A combination of these may also be used.

  The search device 10 according to the present embodiment has the above-described configuration. Next, the operation of the search device 10 will be described with reference to FIGS. 4 to 8.

  A specific surface profile (for example, a current surface profile in an operating blast furnace) is measured along a specific furnace radius by the measuring means 11, and the specific profile data R obtained by this measurement is used as a difference calculating means 13 (details). Is transmitted as an output signal to the height level deriving means 20) (step 1). In the present embodiment, measurement is performed at intervals of 10 cm from the furnace wall to the furnace center along a specific furnace radius (X axis). At this time, since the furnace radius of the blast furnace is 3.5 m, the measurement values (depth data) of the height of the top surface of the charge deposit layer at 33 places are obtained at equal intervals on the X axis (FIG. 5A). reference).

  The height level deriving means 20 that has received the output signal derives the estimated shape line 50 from the specific profile data R by the first shape line deriving unit 21. Specifically, the first coefficient calculation unit 24 receives the output signal, acquires the continuous function F stored in the first function storage unit 23, and adds the continuous function F to the specific profile data R obtained by the output signal. A coefficient of the continuous function F is derived by fitting F (step 2a).

At this time, the coefficients and the ranges in the X-axis direction in all the interval functions F ₁₁ , F ₂₁ , F ₁₂ , and F ₂₂ that define the continuous function F are calculated as follows based on the specific profile data R.

The value of the coefficient (parameter) of the continuous function F is determined so that the continuous function F best matches the measured values (specific profile data R) measured at a plurality of measurement points. Specifically, the position of an arbitrary measurement point in the furnace radial direction is X _i , the actual surface profile measurement value (profile depth) at that position is Y _i , and the continuous function F is Y = F (X) ,
Σ {Y _i −F (X _i )} ²
Of the continuous function F (coefficients a ₁ and b _{1 in} the above equation (10), coefficients a, b and c in the above equation (11), and a coefficient a _{3 in the} above equation (12) , b ₃ , and the coefficients α, β, γ in the above equation (13) and the section in which the function is defined (the boundary position r1 between the first section and the second section, the second section and the third section) The boundary position r2 and the boundary position r3 between the third section and the fourth section are simultaneously obtained by the steepest descent method which is one of the nonlinear optimization methods. Thus, by using the steepest descent method, the coefficients in all the interval functions F ₁₁ , F ₂₁ , F ₁₂ , and F ₂₂ and the interval functions F ₁₁ , F ₂₁ , F ₁₂ , and F ₂₂ are defined. The range (section) in the axial direction can be easily obtained.

The first coefficient calculation unit 24 is a line defined by a continuous function F into which the coefficients of the respective interval functions F ₁₁ , F ₂₁ , F ₁₂ , and F ₂₂ obtained in this way and the range in the X-axis direction are substituted. Is stored as the estimated shape line 50 (see FIG. 5B). Based on the estimated shape line 50 stored in the first coefficient calculation unit 24, the first height value deriving unit 22 derives and stores the height value of the upper surface of the specific charge deposit layer (step 3a).

  On the other hand, in parallel with the derivation of the height value (height level) of the upper surface of the specific deposit in the height level deriving means 20, the correction means 30 also has a plurality of profile data stored in the database 12. One profile data is selected from the above, and the height value of the upper surface of the deposit layer indicated by the profile data A is derived (steps 2b to 3b). Specifically, first, the second shape line deriving unit 31 selects and acquires one profile data (selected profile data A) from a plurality of profile data stored in the database 12 (step 1b). The second shape line deriving unit 31 derives the estimated shape line 150 based on the acquired selection profile data A. Specifically, the second coefficient calculation unit 34 receives the output signal (selected profile data A) from the database 12 and acquires the continuous function F stored in the second function storage unit 33 and acquires it from the database 12. The coefficient of the continuous function F is derived by fitting the continuous function F to the selected profile data A (see FIG. 6A) (step 2b).

  The second coefficient calculation unit 34 stores the line defined by the continuous function F for which the coefficient is determined as the estimated shape line 150 (see FIG. 6B). Based on the estimated shape line 150 stored in the second coefficient calculation unit, the second height value deriving unit 32 derives and stores the height value of the upper surface of the charge deposit layer indicated by the selected profile data A (step) 3b).

  Based on the height values of the specific profile data R and the selected profile data A derived by the first and second height value deriving units 24 and 34, the correction execution unit 35 corrects both the profile data R and A. (Step 4). Specifically, both profile data R, A are set so that the height value of both profile data R, A is a reference position set in the furnace (in this embodiment, the profile depth is 0 mm). Is corrected (see FIGS. 7A and 7B).

The correction of both profile data R and A will be described in detail. Both profile data R and A are a collection of position data composed of a position in the furnace radial direction (X axis) and a position (profile depth) in the furnace central axis direction (Y axis). Each position data is represented as x _i (i = 1 to 33) as the position in the furnace radial direction, and y _ai (i = 1 to 33) as the profile depth measured at these furnace radial positions.

により求め、補正後のデータＹ_ａｉを

により求める。このように補正された特定プロフィールデータＲ１を図７（ａ）に示す。 The height data (profile depth) of the specific profile data R is set to y _ai (i = 1 to 33), and this average value (height value) is first set.

To obtain the corrected data Y _ai

Ask for. FIG. 7A shows the specific profile data R1 corrected in this way.

Similarly, for the selected profile data y _ri (i = 1 to 33),

により平均値（高さ値）を求め、

により補正後のデータＹ_ｒｉを求める。このように補正された選択プロフィールデータＡ１を図７（ｂ）に示す。

To find the average value (height value)

Thus, the corrected data Y _ri is obtained. The selection profile data A1 corrected in this way is shown in FIG.

  Both profile data R1, A1 corrected in this way are stored in the correction execution unit 35.

このように算出された差異値Ｅは、当該差異値Ｅを算出したときに用いた選択プロフィールデータＡを関連付けられ、格納手段４１に送信され格納される。 Next, the calculation means 40 compares the shapes of the top surfaces of the pair of charged material accumulation layers indicated by the two profile data R1, A1 after correction stored in the correction means 30 (see FIG. 8). A difference value E, which is a value serving as an index of the degree of similarity between the shapes of the upper surfaces of the charge accumulation layers, is calculated. Specifically, the calculation means 40 uses the following equation (39), and calculates the difference value E by substituting the corrected profile data R1, A1 into this equation (39) (step 5).

The difference value E calculated in this way is associated with the selected profile data A used when the difference value E is calculated, and is transmitted to and stored in the storage means 41.

  The calculation means 40 determines whether or not the difference value E has been calculated for all the profile data stored in the database 12 (step 6), and until the difference value E is calculated for all the profile data. Steps 1b to 6 are repeated.

  When the difference value E for all the profile data is calculated and stored in the storage means 41 in this way, the extraction means 14 compares the difference values E and selects the five difference values E in ascending order. Profile data associated with E and stored in the storage means 41 is extracted (step 7). That is, the extracting unit 14 selects five difference values E in ascending order and extracts profile data used when calculating the selected difference value E from a plurality of profile data. The five profile data extracted in this way are output from the extraction means 14 to the output means 15 as output signals.

  The output unit 15 that has received this output signal displays the profile data extracted by the extraction unit 14 (step 8). Based on the displayed profile data, the operator who operates the blast furnace can easily retrieve necessary data such as operation conditions and operation results when the profile data is measured.

  According to the search device 10 as described above, even if the plurality of profile data stored in the database 12 are profile data of the upper surface of the charge deposit layer having different height positions in the furnace, from the database 12 It is possible to accurately search and output profile data of a surface profile similar to a specific surface profile.

  In other words, the difference calculating means 13 has a height between the upper surface of the deposit layer having the surface profile indicated by the specific profile data R and the upper surface of the deposit layer having the surface profile indicated by the profile data A selected from the database. By comparing the shapes of the top surfaces of the pair of charge deposit layers indicated by the two profile data R1 and A1 after correction after matching the positions (see FIG. 8), both profile data R and A before correction indicate Regardless of the height position in the furnace of the upper surfaces of the pair of charge deposit layers, the degree of similarity between the shapes (that is, surface profiles) of the upper surfaces of the charge deposit layers can be accurately evaluated.

  In addition, the difference value E, which is an index of the similarity between the shapes of the top surfaces of the pair of charge accumulation layers indicated by the profile data R and A, is a pair of charge data indicated by the profile data R1 and A1 after correction. The distance between the upper surface of the pair of charged deposit layers is determined at a plurality of specific positions arranged from the furnace center to the furnace wall along the specific furnace radius on the upper surface of the deposited deposit layer. Since the degree of similarity between the specific surface profile and the surface profile indicated by each profile data is compared according to the magnitude, the degree of similarity can be easily and reliably determined. it can. For this reason, the difference value E is calculated for each profile data, and the profile data of a surface profile similar to a specific surface profile is easily selected from a plurality of profile data in the order of similarity by selecting them in descending order. Can be extracted.

  Further, by outputting the profile data extracted by the extraction means 14 by the output means 15, it becomes possible for an operator or the like who operates the blast furnace to acquire the desired profile data quickly and accurately.

  In the search device 10, even if noise is included in the specific profile data R obtained by measuring a specific surface profile, the surface profile at a specific furnace radius position is curved based on the specific profile data R. By imitating the estimated shape line 50 as a line, the influence of noise in the specific profile data R is suppressed (see FIG. 5B), and the profile data of the surface profile similar to the specific surface profile is converted into a plurality of profile data. It becomes possible to extract accurately from the inside.

  That is, regardless of the magnitude and amount of noise included in the specific profile data R, the estimated shape line 50 as a line having a curve is derived based on the specific profile data R, and the upper surface of the specific deposit accumulation layer is specified. The surface profile at the position of the furnace radius is simulated by this estimated shape line 50, so that even if there is a partial protrusion or the like (noise) that happens to occur on the upper surface of the specific deposit layer measured, The influence is suppressed (smoothed) and a specific surface profile with high accuracy is obtained. As a result, accuracy in extracting profile data of a surface profile similar to a specific surface profile from a plurality of profile data is improved.

  Further, in the search device 10, based on the selected profile data A, the estimated profile line 150 uses the surface profile at a specific furnace radius position on the upper surface of the charge deposit layer indicated by the selected profile data as a line having a curve. By imitating, the influence of noise in the selected profile data is also suppressed (see FIG. 6B). Therefore, in the comparison between the specific surface profile indicated by the specific profile data R and the surface profile indicated by each profile data, the influence of noise included in both the profile data R and A is suppressed, and thereby the both profile data R and A indicate. The degree of similarity between the pair of layer upper surface shapes can be more accurately evaluated. Thereby, the precision at the time of extracting the profile data of the surface profile similar to a specific surface profile from several profile data improves more.

  The continuous function F in the first and second shape line deriving units 21 and 31 is divided into a plurality of sections, and a section function that defines a line segment in accordance with the surface profile is set for each of the plurality of sections. It is possible to obtain estimated shape lines 50 and 150 that approximate the shapes of the actual specific charge deposit upper surface and the charge deposit upper surface indicated by the selected profile data A. As a result, the accuracy in extracting profile data of a surface profile similar to a specific surface profile from a plurality of profile data is further improved.

The estimated shape lines 50 and 150 are defined by connecting a small number of interval functions F ₁₁ , F ₂₁ , F ₁₂ , and F ₂₂ as in the search device 10, so that the specific profile data R or the selected profile data A is added. The calculation of the coefficient in each interval function based on this and the range in the specific furnace radial direction is facilitated, and the derivation of the estimated shape lines 50 and 150 is facilitated.

In addition, the estimated shape lines 50 and 150 defined by a series of few interval functions have a shape that conforms to the surface profile of the upper surface of the charge deposit layer. That is, the estimated shape line is obtained by connecting lines defined in series by the first linear function F ₁₁ , the first curve function F ₂₁ , the second linear function F _12, and the second curve function F ₂₂ , respectively. By defining 50 and 150, it is possible to obtain an estimated shape line having a shape corresponding to the surface profile of the upper surface of the charge deposit layer. Since the estimated shape lines 50 and 150 derived in this way are shapes conforming to the surface profile and noise contained in the profile data is suppressed, profile data of a surface profile similar to a specific surface profile is stored in a plurality of ways. The accuracy when extracting from profile data is further improved.

  The search device 10 of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

  For example, in the above embodiment, the specific profile data R and the selected profile data A are adjusted in height level after the estimated shape line is derived (that is, the height value is calculated and the mutual height value is calculated). However, the estimated shape line may not be derived. That is, the height value is directly calculated without deriving the estimated shape line from both the profile data R and A, and both the profile data R and A may be corrected so that the height values coincide with each other (FIG. 9). (See (a) and FIG. 9 (b)). Even if it correct | amends in this way, the height of the charge deposit layer upper surface which has the specific surface profile which specific profile data R shows by the correction, and the charge deposit layer upper surface which has the surface profile which selection profile data A shows After the positions are matched, the shapes of the upper surfaces of the pair of charge accumulation layers are compared with each other, so that the height of the upper surface of the pair of charge accumulation layers indicated by the two profile data R and A before correction in the furnace is increased. Regardless of the position, it is possible to accurately evaluate the degree of similarity between the surface profiles on the upper surface of the charge deposit layer.

  However, comparing the profile data obtained by deriving the estimated shape line and performing smooth processing reduces the influence of noise contained in both profile data to be compared, and the degree of similarity between the surface profiles indicated by both profile data. Can be evaluated with high accuracy. Specifically, the profile data A is output as profile data of the top five surface profiles similar to the specific surface profile in the search device 10 of the above-described embodiment (comparison after deriving the estimated shape line). It can be seen that both profile data R and A smoothed by deriving the estimated shape line at this time have approximate surface profiles as shown in FIG. However, in the case of a search device that compares without deriving an estimated shape line, it did not enter the top five similar cases. As shown in FIGS. 9 (a) and 9 (b), unevenness (noise) appears in the inclined portion of the furnace radius position 1m to 2m portion of the surface profile indicated by the profile data A, and both of the unevenness cause both of them. This is because the difference value E between the profile data R and A has increased.

  Further, in the present embodiment, the continuous function F is defined by arranging the above formulas (10) to (13) in order from the furnace wall to the furnace center side, but is not limited to this. Specifically, in the continuous function F, each function that defines the connection curve portion 53 and the center curve portion 55 is an angle with respect to the position in the x-axis direction at the angle formed by the tangent line of the curve defined by the function and the x-axis. Any function with a constant rate of change may be used. For example, in the continuous function F, the function that defines the connection curve portion 53 and the function that defines the center curve portion 55 are opposite, that is, the function that defines the connection curve portion 53 is the center curve portion 55 in the above equation (13). The function that defines the connection curve portion 53 and the function that defines the center curve portion 55 are the same function, that is, the function that defines the connection curve portion 53, and Both the function defining the central curve portion 55 may be the above equation (11) or the above equation (13).

  Further, the number of functions that define the continuous function F is not limited to four, and may be three or five or more.

10 Searching device 11 Measuring means 12 Database (data storing means)
13 Difference calculation means 14 Extraction means 15 Output means 20 Height level derivation means 30 Correction means 40 Calculation means 41 Storage means 50, 150 Estimated shape line A Selected profile data A1 Corrected selection profile data E Difference value F Continuous function R Specific Profile data R1 Specific profile data after correction

Claims (11)

A search method for retrieving profile data of a layer upper surface shape similar to a specific layer upper surface shape from a plurality of profile data, which is data of a layer upper surface shape in a charge accumulation layer stacked in a blast furnace,
A measuring step for measuring the top surface shape of the specific layer along a specific furnace radius;
A pair of charge deposition layer upper surfaces indicated by both profile data by comparing the specific profile data, which is profile data of the specific upper surface shape obtained in the measuring step, with the profile data of the plurality of profile data A difference calculating step for calculating a difference value that is a value that is an index of the degree of similarity of the shape of each,
Each difference value calculated in this difference calculation step is compared, a predetermined number of the difference values are selected in ascending order, and profile data used when calculating the selected difference value is selected from the plurality of profile data. An extraction step of extracting,
The difference calculating step derives a height level for deriving a value representing a height position in the furnace of the upper surface of the charge deposit layer having the specific upper surface shape of the layer based on the specific profile data obtained in the measuring step. Selecting one profile data from the plurality of profile data, a value representing the height position in the furnace of the upper surface of the deposit layer having the shape of the upper surface of the layer indicated by the selected profile data, and the height In such a manner that at least one of the profile data is maintained in the shape of the layer upper surface indicated by the profile data so that the value representing the height position of the specific profile data derived in the height level deriving step is matched. A correction process for correcting the upper surface of the deposit layer to be moved up and down, and a pair of upper surfaces of the deposit layer indicated by both profile data after the correction are performed. The distance between the upper surfaces of the pair of charge accumulation layers at a plurality of specific positions arranged from the furnace center to the furnace wall along the specific furnace radius is obtained, and the sum of the distance values at each of the specific positions is obtained. Calculating the profile data as the difference value, and performing the correction step and the calculation step for each profile data of the plurality of profile data. In the blast furnace charge profile data search method according to claim 1,
The value representing the height position in the furnace of the upper surface of the charge deposit layer in the height level deriving step and the correcting step is the furnace at a position along the specific furnace radius of the upper surface of the charge deposit layer. A method for retrieving profile data of a blast furnace charge, characterized by being an average value of the height from the center to the furnace wall. In the blast furnace charge profile data search method according to claim 1 or 2,
In the step of deriving the height level, an estimated shape line that simulates a layer upper surface shape at a position along the specific furnace radius of the specific charge deposition layer upper surface as a line having a curve is based on the specific profile data. Deriving a first shape line deriving step, and deriving a value representing the height position based on the estimated shape line derived in the first shape line deriving step,
In the first shape line derivation step, a continuous function including an undetermined coefficient for prescribing the estimated shape line is prepared in advance, and the specific profile data obtained in the measurement step is used as the basis. A method for retrieving profile data of a blast furnace charge, wherein the estimated shape line is derived by calculating a coefficient of a continuous function. In the blast furnace charge profile data search method according to claim 3,
The correcting step derives an estimated shape line that simulates a layer upper surface shape at a position along the specific furnace radius on the upper surface of the deposit layer based on the selected profile data. Before correcting at least one of the profile data so that a value representing the height position of the selected profile data matches a value representing the height position of the specific profile data Deriving a value representing the height position based on the estimated shape line derived in the second shape line deriving step,
In the second shape line derivation step, a continuous function including an undetermined coefficient for defining the estimated shape line is prepared in advance, and the coefficient of the continuous function is calculated based on the selected profile data. The estimated shape line is derived by doing the blast furnace charge profile data search method. In the blast furnace charge profile data search method according to claim 4,
Each continuous function in the first and second shape line derivation steps is defined by a series of section functions each defined for a plurality of sections partitioned along the specific furnace radius,
The plurality of types of interval functions are set such that the coefficient and the range in the direction along the specific furnace radius are undetermined and are continuous at the boundary between adjacent interval functions, and the specific profile data or the selected profile A method for retrieving profile data of a blast furnace charge, wherein an estimated shape line is derived by calculating coefficients in all interval functions and ranges in a specific furnace radial direction based on data. In the blast furnace charge profile data search method according to claim 5,
The interval function is a function represented on the xy plane with the furnace central axis as the y-axis and the specific furnace radius as the x-axis.
The continuous function is defined by four interval functions, and the four interval functions are a first linear function, a first curve function, a second linear function, which are arranged in order from the furnace wall toward the furnace center side, and A second curve function,
The first linear function is a function in which a line defined by the function is positioned in the vicinity of the furnace wall and becomes a horizontal or substantially horizontal straight line, and the second linear function is defined by the function. The line is a function that is positioned closer to the furnace center than the first linear function and becomes a straight line having a constant downward slope toward the furnace center, and the first curve function is a line defined by the function. It is located between the first linear function and the second linear function, and is defined by a substantially horizontal straight furnace center side end defined by the first linear function and the second linear function. The second curve function is a function that smoothly connects a straight line with a straight line with a downward slope, and a line defined by the function is located at the center of the furnace and expands upward. Profies of blast furnace charges characterized by the function of the curve Data search method. In the blast furnace charge profile data search method according to claim 6,
The continuous function is a function represented on an xy plane in which the furnace central axis is the y-axis and the specific furnace radius is the x-axis.
The first curve function or the second curve function is a function having a constant angle change rate with respect to a position in the x-axis direction at an angle between a tangent line of the curve defined by the curve function and the x-axis. A method for retrieving profile data of a characteristic blast furnace charge. In the blast furnace charge profile data search method according to claim 7,
The first curve function or the second curve function is a function represented by the following equation (1) or (2): A method for retrieving profile data of a blast furnace charge.
y = (− 1 / a) · log | cos (ax + b) | + c (1)
y = αx ² + βx + γ (2)
Here, a, b, c, α, β, and γ are coefficients. A search device for retrieving profile data of a layer upper surface shape similar to a specific layer upper surface shape from a plurality of profile data which is data of a layer upper surface shape in a charge accumulation layer stacked in a blast furnace,
Data storage means for storing the plurality of profile data in advance;
By comparing each profile data stored in the data storage means with the specific profile data which is the profile data of the specific upper layer shape, the degree of similarity in shape between the upper surfaces of the pair of charge deposit layers indicated by both profile data A difference calculation means for calculating and storing a difference value as an index value of
Each difference value stored in the difference calculating means is compared, a predetermined number of the difference values are selected in ascending order, and the profile data used when calculating the selected difference value is selected from the plurality of profile data. Extracting means for extracting;
Output means for outputting the profile data extracted by the extraction means to the outside,
The difference calculating means is provided in a furnace on the upper surface of the charge deposit layer having the specific layer upper surface shape based on the specific profile data obtained by measuring the specific layer upper surface shape along a specific furnace radius. Height level deriving means for deriving and storing a value representing the height position of
One profile data is selected and acquired from the plurality of profile data stored in the data storage means, and the height in the furnace of the charge deposit layer upper surface having the layer upper surface shape indicated by the selected profile data The upper surface of the layer that the profile data indicates at least one of the profile data so that the value representing the position matches the value representing the height position of the specific profile data derived and stored by the height level deriving means Correction means for correcting the upper surface of the deposit layer having the shape of the upper surface of the layer while raising and lowering the shape, and storing both profile data after the correction,
The pair of loadings at a plurality of specific positions arranged from the furnace center to the furnace wall along the specific furnace radius on the upper surface of the pair of charge deposit layers indicated by the corrected profile data stored in the correction means. Calculating the distance between the upper surface of the deposit layer, and calculating and storing the sum of the distance values at each of these specific positions as the difference value, and
The blast furnace charge profile data search device, wherein the correction means and the calculation means respectively calculate and store the difference values between the profile data and the specific profile data. In the blast furnace charge profile data search device according to claim 9,
A blast furnace charge profile data search device, wherein the data storage means stores a value representing the height position of each profile data derived in advance together with corresponding profile data. In the blast furnace charge profile data search device according to claim 9 or 10,
It further comprises measurement means for measuring the upper surface shape of the specific charge deposit layer along the specific furnace radius and transmitting the measurement value obtained by this measurement to the height level deriving means. The blast furnace charge profile data search device.

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