JP2014219299A - Method of processing profile measurement data on charge in blast furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of processing measurement data for measuring a profile of a charge in a blast furnace of an arbitrary shape.SOLUTION: Two measuring devices A1 and A2 each measuring a distance to a measuring target in accordance with transmission/reception of a microwave are installed at each symmetrical position about a central axis of a blast furnace 2 in a furnace top portion of the blast furnace 2. The measuring devices A1 and A2 each emits a microwave to scan a surface of a charge 4 in a blast furnace in a direction of a diameter passing through a central axis of the blast furnace 2 to measure distance data to the charge 4. The distance data is subjected to coordinate transform based on scan angle data on the microwave at a time of measuring the distance data, and a surface profile of the charge 4 is computed. In the measuring of the profile of the charge 4 in the blast furnace, an incident angle of the microwave on the surface of the charge 4 is calculated at each measuring point by the two measuring devices A1 and A2, and the measuring data for which the incident angle is closer to 90° is adopted. The profile of the charge 4 in the blast furnace is computed by a combination of the measuring data of the two measuring devices A1 and A2.

Description

  The present invention relates to a method for processing measurement data of the shape (profile) of the surface of a blast furnace interior.

  In general, blast furnaces in the production of pig iron are alternately charged with sintered ore or lump iron ore (hereinafter simply referred to as iron ore or ore) and coke as a charge from the top of the furnace. As a result, the ore layer and the coke layer are formed in the furnace. The iron ore is heated and reduced (indirect reduction) by the CO gas generated by the reaction between the hot air blown from the tuyere below the blast furnace and coke, and part of the iron ore is reduced directly by the coke and softened and fused. After forming the band, it becomes a droplet. The droplets, that is, the molten iron, pass between the coke layers and accumulate at the bottom of the furnace. The ore layer and coke layer formed in the furnace gradually descend in the furnace.

  In the above process, it is very important to adjust the charge distribution at the top of the furnace formed by the iron ore and coke charged in the blast furnace to obtain an appropriate gas distribution. The profile (surface shape) of the charge at the top of the furnace in the blast furnace is determined by the moving armor in the bell-type charging device and the fall trajectory of the charge through the distribution chute in the bell-less charging device. At the time of normal charging, the profile of the charge at the top of the furnace has a substantially inverted conical shape whose center is low with the center vertical direction (axial center) of the blast furnace as the axis. The profile of the blast furnace interior is important information for the operation of the blast furnace, and a method for measuring the profile of the charge charged and deposited in the furnace has been developed and put into practical use.

  Conventionally, as described in, for example, Patent Document 1 and the like, a measurement lance equipped with a microwave distance meter is inserted from the side surface of the furnace port of the furnace body toward the axis of the blast furnace, and the microwave is placed inside the blast furnace. There has been a method of transmitting to the entry and measuring the distance to the surface of the blast furnace interior entry. Although this method has the advantage that distance measurement is possible because of the small attenuation of microwaves even in high-concentration dust in the furnace, the apparatus is large and expensive, and the operation is complicated. In addition, when the raw material is charged, the measurement lance must be evacuated from the furnace body, so that there is a problem that it can be measured only several times a day at most.

  Thus, for example, Patent Document 2 and Patent Document 3 describe measurement methods that can maintain the advantages of microwaves and perform level measurement without stopping the charging of raw materials for a long time. These installed a profile measuring device equipped with a microwave rangefinder capable of transmitting and receiving microwaves and a scanning drive device that scans the microwave radiation direction at the top of the blast furnace above the raw material charging device, A microwave is scanned into the blast furnace, and the surface profile of the blast furnace interior is calculated by the data processing unit by combining the distance data input from the microwave rangefinder and the scanning angle data input from the scanning drive unit. is there.

  When microwaves are transmitted from the measuring device installed at the top of the blast furnace, if the incident angle of the microwaves on the charge becomes small, the measurement accuracy decreases, and in some cases, the measurement becomes impossible. For this reason, in Patent Document 2, it is determined in advance up to the blast furnace interior entrance on the opposite side of the installation position of the microwave distance meter across the central axis of the blast furnace or in a range where the incident angle of the microwave does not become smaller than 50 degrees. A measuring method for measuring a distance within a scanning angle range is disclosed. Further, in Patent Document 3, a measurement is performed within a predetermined scanning angle range on the opposite side of the microwave rangefinder excluding the central portion of the blast furnace, and a straight line approximation is performed to estimate the surface shape of the blast furnace interior entrance and branch. A method for determining a location and selecting distance data based thereon is disclosed.

Japanese Utility Model Publication No. 1-2216 JP 2010-174371 A Japanese Patent Application Laid-Open No. 2011-2241

  However, the measurement methods of Patent Documents 2 and 3 are limited to measuring a mortar-shaped profile in which the center of the blast furnace or the vicinity of the center is the lowest point of the charge. For this reason, for example, when the central part is raised as in the case of center insertion or when measuring a profile having a complicated shape, the measurement data of the facing part is simply used as in the methods of Patent Documents 2 and 3. However, there is a problem that a highly accurate measurement result cannot always be obtained.

  The objective of this invention is providing the processing method of the measurement data which calculates | requires the profile of the blast furnace interior inclusion of arbitrary shapes with high precision.

  In order to solve the above-described problem, the present invention provides two measuring devices that measure the distance to the measurement object by transmitting and receiving microwaves at the top of the blast furnace at symmetrical positions with respect to the central axis of the blast furnace. From the measuring device, the microwave radiation direction is scanned in the diameter direction passing through the central axis of the blast furnace on the surface of the blast furnace interior, and the distance data to the charge is measured. The distance data is coordinate-transformed based on the microwave scanning angle data, and in the blast furnace interior profile measurement for calculating the surface profile of the blast furnace interior input, for each measurement point by the two measuring devices, Calculate the incident angle of the microwave on the surface of the charge, adopt the measurement data with the incident angle close to 90 °, and combine the measurement data from the two measuring devices Was characterized by calculating the profile of the charge in provides a method of processing a profile measurement data of the blast furnace interior container.

  In the method for processing the profile measurement data of the blast furnace interior material, instead of adopting the measurement data having a microwave incident angle close to 90 ° with respect to the surface of the charge, measurement by the two measurement devices is performed. Of the data, measurement data having a smaller distance from the adjacent measurement point may be employed. Alternatively, when measurement data obtained by a microwave distance meter having an incident angle closer to 90 ° is adopted and there is a missing portion of the data, the missing portion is adjacent to the measured data obtained by the two measuring devices. Measurement data having a smaller distance from the measurement point to be measured may be employed.

  In addition, when the amount of change between the angle formed by a certain measurement point and the measurement point before and after that and the angle formed by the adjacent measurement point and the measurement point before and after that exceeds a preset threshold, The measurement data at the measurement point may be determined as an abnormal value and the measurement result at the measurement point may be removed. Alternatively, when the distance between measurement points with adjacent measurement points exceeds a preset threshold value, the measurement data at the measurement point may be judged as an abnormal value and the measurement result at that measurement point may be removed. Good.

  According to the present invention, a highly accurate profile can be obtained because more accurate measurement data is obtained even with a complicated shape.

It is a longitudinal cross-sectional view which shows the example of the blast furnace top part provided with the profile measuring apparatus in the furnace top part. It is a block diagram which shows an example of a profile measuring apparatus. It is a flowchart which shows the example of the process sequence of the measurement data concerning this invention. It is explanatory drawing of the abnormal point detection method. It is explanatory drawing which shows the example of how to obtain | require the incident angle of a microwave. It is a graph which shows the example of the relationship between the x coordinate in a furnace and incident angle for every measuring apparatus. It is a graph which shows the example from which the relationship between the in-furnace x coordinate and incident angle for every measuring apparatus differs. It is a graph which shows the profile obtained based on FIG. It is a graph which shows the profile obtained based on FIG. It is a flowchart which shows the example from which the process sequence of the measurement data concerning this invention differs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example in which a profile measuring device is installed in a blast furnace 2. The two profile measuring devices A1 and A2 are installed on the outer side of the furnace body 3 in the vicinity of the top of the furnace and at symmetrical positions with respect to the central axis of the furnace body 3. A bell-less charging device 5 is provided at the furnace port of the furnace body 3, and a charge 4 such as iron ore or coke is charged into the furnace through the distribution chute 6.

  FIG. 2 is an enlarged view showing an example of the configuration of the profile measuring apparatuses A1 and A2. As shown in FIG. 2, the profile measuring apparatuses A1 and A2 include an antenna 11 and a reflecting plate 12, a waveguide 13 that supports, drives, and controls the antenna 11 and the reflecting plate 12, respectively, a microwave transceiver 14, and a drive shaft. 15 and a reflector driving device 16. The antenna 11 and the reflection plate 12 are accommodated in the pressure resistant container 20. The pressure vessel 20 has an opening 21 on the bottom surface facing the inside of the furnace, and the opening 21 is provided with a partition plate 22 that can pass microwaves, a shutter 23, a protective net 24, and the like.

  The antenna 11 is a parabolic antenna having a diameter of about φ250 to φ360 mm, for example, and is connected to the microwave transceiver 14 via the waveguide 13. The microwave transmitter / receiver 14 generates a microwave whose frequency continuously changes in a certain range and can transmit and receive the microwave. A data processor 18 is connected to the microwave transceiver 14 by a signal line 19.

  The microwave generated in the microwave transmitter / receiver 14 and continuously changing in frequency is radiated from the antenna 11, reflected by the reflector 12, and irradiated on the surface of the charge 4 to be measured in the blast furnace 2. The The irradiated microwave is reflected by the surface of the charge 4, and this reflected wave is received and detected by the microwave transceiver 14. In the data processing unit 18, the round-trip time ΔT of the microwave from the antenna 11 to the measurement target (the surface of the charge 4) is obtained from the change in frequency ΔF from the emission to reception of the microwave at the antenna 11. The distance from the antenna 11 to the measurement target is calculated. This measurement is based on the FMCW (Frequency Modulated Continuous Wave) method (Frequency Modulated Continuous Wave method) that mixes and measures the electrical signal that emits the microwave and the electrical signal that is obtained by receiving the reflected wave from the charged surface. ). A commercially available apparatus may be used for the microwave distance meter of this type.

  The transmission frequency band of the microwave used for measurement is 10 GHz or more, preferably about 24 GHz. The higher the frequency, the smaller the antenna 11 can be made. By using the microwave, the profile in the blast furnace 2 can be accurately measured without being affected by the environment such as temperature and dust. Moreover, since the parabolic antenna has high directivity, microwaves can be radiated with high accuracy toward a desired position. Furthermore, since the spread of the microwave at the time of radiation | emission is suppressed, the opening part 21 toward the inside of a furnace can be made small.

  As shown in FIG. 2, a drive shaft 15 that connects the reflector 12 and the reflector driving device 16 is provided on an extension of the antenna 11 in the microwave transmission / reception direction (center axis direction). That is, the drive shaft 15 is provided so that the center axis of the drive shaft 15 coincides with the center axis of the antenna 11. As shown in FIG. 2, the reflector 12 is fixed to the drive shaft 15 at an angle of approximately 45 ° with respect to the central axis of the antenna 11. The reflector 12 is made of, for example, a stainless steel plate, and the area viewed from the front side of the antenna 11 is slightly larger than the antenna 11. Although the shape is not limited, a circular shape is preferable in terms of operability. By rotating the drive shaft 15 around its central axis by the reflector driving device 16, the microwave radiated from the antenna 11 toward the central axis is reflected by the reflector 12 toward the inside of the blast furnace 2. The blast furnace 2 is scanned in the diameter direction. The reflection direction of the microwaves by the reflecting plate 12 moves in a direction perpendicular to the paper surface of FIG. The reflector 12 is arranged so that the microwave passes through the central axis of the furnace.

  The opening 21 of the pressure vessel 20 communicates with the inside of the blast furnace 2 and is formed so that the microwave reflected by the reflecting plate 12 is irradiated to a predetermined range in the furnace.

  The inner surface of the pressure vessel 20 is covered with a radio wave absorber corresponding to the transmission frequency band except for the inner opening 21 of the furnace and the reflection surface side of the reflector 12, so that the microwave can be diffusely reflected and multiple reflected in the pressure vessel 20. It is preferable to suppress the measurement noise caused.

  Further, at the time of measuring the profile, for the purpose of preventing the gas or dust inside the blast furnace 2 from entering the pressure vessel 20 and further preventing the gas inside the blast furnace 2 from leaking to the outside through the pressure vessel 20. The pressure vessel 20 may be pressurized with an inert gas such as nitrogen gas so that the pressure is about 1.1 times the furnace pressure.

  Since the microwave is emitted from the antenna 11 and spreads at a certain angle, for example, about 2 °, the microwave has a certain extent when reaching the charge 4. Therefore, when the incident angle with respect to the charge 4 is small, the distribution range of the charge 4 included in the microwave irradiation range becomes wide, and the measurement results vary. On the other hand, if the incident angle to the charge 4 is close to 90 °, the distribution range of the charge 4 within the microwave irradiation range is narrow, and a more accurate measurement result can be obtained. Further, when the incident angle is reduced, the intensity of the reflected wave is weakened, the measurement accuracy is lowered, and in some cases, measurement is impossible. Therefore, in the present invention, by using and combining the measurement results of the profile measurement apparatus having the microwave incident angle close to 90 ° out of the measurement data of each of the two profile measurement apparatuses A1 and A2, high accuracy is achieved. A good profile measurement result.

  Hereinafter, an example of the processing procedure of the profile measurement data of the blast furnace interior according to the present embodiment will be described with reference to FIG.

<Data acquisition (S1)>
First, microwaves are transmitted from the microwave transmitter / receiver 14 with the reflecting plates 12 of the two profile measuring apparatuses A1 and A2 installed at symmetrical positions with respect to the central axis of the blast furnace 2 being directed to the initial positions. . The microwave is reflected by the reflector 12 via the waveguide 13 and the antenna 11 and irradiated to the blast furnace interior entrance 4, and then the reflected wave from the charge 4 is received by the microwave transceiver 14. Then, the distance to the charge 4 is measured. At that time, the reflecting plate 12 is rotated by the reflecting plate driving device 16 from one end side in the inner diameter direction of the furnace to the measurement position on the other end side. For each angle preset according to the desired spatial resolution, the distance to the charge 4 is measured, the distance data is obtained, and the current scanning angle data from the reflector driving device 16 is the data processing unit. 18 is sent.

<Coordinate transformation (S2)>
The data processing unit 18 of each of the two profile measuring apparatuses A1 and A2 performs coordinate conversion into orthogonal coordinate system data based on the acquired scanning angle data and the distance data at that time, and the charge at each position in the blast furnace. Calculate the profile.

<Abnormal point removal (S3)>
When an abnormal point is recognized due to an obstacle present in the furnace, the data is removed. The detection of the abnormal point is performed by, for example, the amount of change in angle with the previous and subsequent measurement points and the distance between the measurement points. FIG. 4 shows an example in which the measurement value at the measurement point Pn is an abnormal point. As shown in FIG. 4, a straight line connecting the measurement point P (n−1) immediately before the measurement point Pn and the measurement point Pn, and the next measurement point P (n + 1) and the measurement point Pn are connected. The angle formed by the straight line is defined as θn. Similarly, a straight line connecting a measurement point P (n-1) immediately before the measurement point Pn and a measurement point P (n-2) immediately before the measurement point P (n-1), and one after Θ (n−1) is an angle formed by a straight line connecting the measurement point Pn, and θ (n−1) is an angle formed by a straight line connecting the measurement point P (n + 1) immediately after the measurement point Pn and the measurement point before and after the measurement point Pn. n + 1),...
| Θ (n−1) −θn |> Δθa
Or | θ (n) −θ (n + 1) |> Δθa
However, when Δθa becomes a threshold value for the amount of change of the preset angle, that is, the angle formed by the straight line connecting the measurement point Pn and the measurement points before and after it, the measurement point P (n−1) or the measurement point. When the amount of change in the angle formed by the straight line connecting P (n + 1) and the measurement points before and after it exceeds a preset threshold value Δθa, it is determined that the measurement data at the measurement point Pn is abnormal, Remove the data.

Moreover, you may perform the detection of an abnormal point by the distance between measurement points. That is,
| P (n−1) Pn |> Δda
Or | PnP (n + 1) |> Δda
However, Δda is a threshold value of the distance between measurement points set in advance, that is, the distance between the measurement point Pn and the previous measurement point P (n−1) or the next measurement point P (n + 1) is When the preset threshold value Δda is exceeded, it is determined that the measurement data at the measurement point Pn is abnormal, and the data is removed. The detection of the abnormal point is performed when either the amount of change in the incident angle θ or the distance between measurement points exceeds a preset threshold value.

<Descent amount correction (S4)>
Next, with respect to the measured distance data, a correction amount due to the fall of the charge for the reaction in the furnace or the like is obtained. As a method of obtaining the descending speed, for example, it may be obtained assuming that the descending speed V is constant regardless of the position in the furnace. That is, at an arbitrary position such as a position where the microwave is directed directly below, from the first distance data D1 at the same scanning angle set in advance and the second distance data D2 measured after time T,
V = (D2-D1) / T
Ask for. The descending speed V can be obtained by any other method. If it is continuously obtained in the radial direction in the furnace, it can be obtained with higher accuracy.

<Smoothing (S5)>
About the measurement data obtained by the above, the process of averaging etc. is performed, it is set as a smooth curve, and the profile using each measurement data is created for every two profile measurement apparatuses A1 and A2.

<Incident angle calculation (S6)>
Next, regarding the measurement by these two profile measuring apparatuses A1 and A2, in this embodiment, the incident angle of the microwave at each measurement point is calculated.

  An example of how to determine the incident angle will be described. As shown in FIG. 5, the microwave irradiation positions of the profile measuring apparatuses A1 and A2 are Sm (m = 1, 2), and the measurement points are Pmn (n = 1, 2, 3, 4,...). m represents the A1 side (m = 1) or A2 side (m = 2) of the profile measuring apparatus. The coordinates of the measurement point Pmn are represented by (xmn, zmn), where the radial direction in the furnace is the x axis and the vertical direction is the z axis. The profile curve by one of the profile measuring devices after smoothing in S5 is Lm, and the intersection of the curve Lm and the straight line SmPmn is Qmn. The curve Lm is differentiated to obtain the tangent line of the curve Lm at the intersection Qmn, and the angle (0 <θmn <90 °) between the tangent line and the straight line SmPmn is defined as the microwave incident angle θmn. Then, for each profile measuring apparatus, the incident angle θmn is obtained for each measurement point. The method of obtaining the incident angle θmn is not limited to the above example, and may be, for example, an angle between a straight line P (mn−1) P (mn + 1) connecting the measurement points before and after the measurement point Pmn and the straight line SmPmn. .

<Decision of recruitment points (S7)>
For one of the two profile measuring devices A1 and A2 (m side), the relationship between the incident angle θmn obtained in S6 and the radial position x is
θ = fm (x)
And Then, a line graph is created with the x-coordinate in the radial direction in the furnace as the horizontal axis and the incident angle θ as the vertical axis. Here, the data acquisition section is a polygonal line connecting the incident angles θmn with line segments, and θ = 0 except in the data measurement section. 6 is an example of a graph showing the relationship between the x-coordinate in the radial direction in the furnace and the incident angle θ in the profile measurement during normal charging and FIG. 7 in the profile measurement during central charging. For each measurement point P1n, P2n, the magnitudes of f1 (x) and f2 (x) are compared as follows, and for each measurement point, which measurement device has a large incident angle, that is, 90 °. Compare the closeness and determine the data to be adopted. That is, for the measurement points P1n and P2n,
f1 (x1n) ≧ f2 (x1n)
In the case of, adopt P1n,
f1 (x2n) <f2 (x2n)
In this case, P2n is adopted. In the example of FIG. 6, since the incident angle is closer to 90 ° on the measuring device A1 side in the section (1) and the section (3), the measurement data of the measuring apparatus A1 is adopted, and the section (2) and the section ( 4) adopts the measurement data of the measuring device A2 because the incident angle is closer to 90 ° on the measuring device A2 side. In the case of FIG. 7, the measurement data on the measurement apparatus A1 side is used for the sections (1), (3), and (5), and the measurement data on the measurement apparatus A2 side is used for the sections (2), (4), and (6).

<Both-side data composition processing (S8)>
Charges as shown in Fig. 8 (normal charging) or Fig. 9 (central charging) by combining the data from the measuring devices on both sides used in S7 and connecting them smoothly so that there is no step. Is obtained.

  As described above, a high-accuracy profile can be obtained by calculating the incident angle of the microwave for each measurement point and adopting measurement data having an incident angle close to 90 ° out of the two profile measuring devices.

  FIG. 10 shows a processing procedure of profile measurement data of blast furnace interior according to a different embodiment of the present invention, and a method of selecting data to be adopted according to the distance between measurement points instead of calculating the incident angle of microwaves. is there.

  In FIG. 10, the procedures up to data acquisition (S1), coordinate transformation (S2), abnormal point removal (S3), descent amount correction (S4), and smoothing (S5) are the same as those in the embodiment of FIG. Therefore, the description is omitted.

<Calculation of distance between measurement points (S9)>
For a certain measurement point Pmn, distances d (mn-1) and d (mn + 1) from the measurement points P (mn-1) and P (mn + 1) on the xz plane are obtained, and d (mn-1) and d (mn + 1) are obtained. ) Is smaller than dmn.

<Adopting point determination (S10)>
In the measurement data of the two measuring devices A1 and A2, the relationship between the dmn obtained in S9 and the radial direction position x in the blast furnace is
d = gm (x)
And Then, a line graph is created with the x-coordinate in the radial direction in the furnace as the horizontal axis and the distance d between the measurement points as the vertical axis. Here, gm (x) is a broken line connecting each dmn. For each measurement point P1n, P2n, the magnitudes of g1 (x) and g2 (x) are compared as follows, and for each measurement point, which measurement device has a smaller distance between measurement points is compared. , Determine the data to adopt. That is, for the measurement points P1n and P2n,
g1 (x1n) ≦ g2 (x1n)
In the case of, adopt P1n,
g1 (x2n) ≧ g2 (x2n)
In this case, P2n is adopted.

<Both-side data composition processing (S11)>
Similar to S8 of FIG. 3, the profile of the charge can be obtained by combining the data from the measurement devices on both sides employed in S10 and smoothly connecting them so as not to produce a step.

  The distance between adjacent measurement points is small because the distribution density of the measurement points is high. If the measurement data for that interval is used, the data for many measurement points is used, so the profile with high resolution is used. Is obtained. Further, when the microwave is scanned at a constant speed, a section where the interval between adjacent measurement points is close is a section where the incident angle of the microwave is close to 90 °. Therefore, by adopting measurement data having a smaller distance between measurement points, data having a microwave incident angle close to 90 ° is adopted. If a sufficient number of measurement points can be obtained, the method of obtaining the incident angle is highly accurate and effective, but there are missing points in the data due to the influence of the profile shape and when there are obstacles in the furnace. When a sufficient number of measurement points cannot be obtained, the method of FIG. 10 is effective in selecting the use of data by the measurement point interval.

  Further, after obtaining the profile by carrying out the method shown in FIG. 3, for example, the entire profile in the blast furnace is covered with the microwave beam diameter, that is, within the range of the microwave beam at each measurement point. It is preferable to calculate whether there is an overlap. This is calculated from the diameter of the antenna that radiates the microwave and the angle at which the microwave spreads (eg, 2 °). When the whole can be covered with the beam diameter of the microwave, the profile shape obtained by the method of FIG. 3 in which data is selected according to the incident angle becomes the measurement result as it is. When there is a portion that cannot be covered, the profile shape is obtained by synthesizing the data in the section using the method of FIG. 10 that employs the data of the measuring device having the smaller distance between the measuring points. Thus, for example, the profile of the section in which the abnormal point is detected and the data is removed is covered by the method of FIG. 10, and optimum data is synthesized according to the shape of the charge and the in-furnace situation. An accurate profile can be obtained.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this example. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  For example, the measuring apparatus for measuring a profile according to the present invention is not limited to the structure shown in FIG. 2, but a microwave rangefinder, a horn-shaped antenna, and a scanning drive for driving the antenna as described in Patent Document 2 above. The measuring device which consists of apparatus may be sufficient.

  The present invention can be applied to the measurement of the surface shape of various shapes of deposits in a container.

2 Blast Furnace 3 Furnace 4 Charge 5 Bellless Charging Device 6 Distribution Chute 11 Antenna 12 Reflector 13 Waveguide 14 Microwave Transceiver 15 Drive Shaft 16 Reflector Drive 18 Data Processing Unit 20 Pressure Vessel 21 Opening A1, A2 Profile measuring device

Claims (5)

Two measuring devices that measure the distance to the measurement object by transmitting and receiving microwaves are installed at the top of the blast furnace at symmetrical positions with respect to the central axis of the blast furnace, and the microwave radiation direction is set from the measuring device. , The distance data to the charge is measured by scanning in the diameter direction passing through the central axis of the blast furnace on the surface of the blast furnace interior charge, and based on the scanning angle data of the microwave at the time of the distance data measurement In coordinate measurement of the blast furnace interior, the distance data is transformed and the surface profile of the blast furnace interior is calculated.
For each measurement point by the two measuring devices, the incident angle of the microwave with respect to the surface of the charge is calculated, the measurement data with the incident angle close to 90 ° is adopted, and the two measuring devices are used. A method for processing profile measurement data of a blast furnace interior input, wherein the profile of the charge is calculated by combining measurement data.   Instead of adopting measurement data having a microwave incident angle close to 90 ° with respect to the surface of the charge, one having a smaller distance to an adjacent measurement point among the measurement data obtained by the two measurement devices The method for processing profile measurement data of blast furnace interior entrance according to claim 1, wherein the measurement data is used.   When the measurement data obtained by the microwave rangefinder with the incident angle close to 90 ° is adopted and there is a missing portion of the data, the adjacent measurement of the measured data obtained by the two measuring devices is measured for the missing portion. 2. The method for processing profile measurement data of blast furnace interior inclusions according to claim 1, wherein measurement data having a smaller distance from the point is adopted.   When the amount of change between the angle between a measurement point and the measurement point before and after that and the angle between the adjacent measurement point and the measurement point before and after that exceeds a preset threshold, the measurement point The method of processing profile measurement data of blast furnace interior according to any one of claims 1 to 3, wherein the measurement data is determined as an abnormal value and the measurement result at the measurement point is removed.   When the distance between adjacent measurement points exceeds a preset threshold value, the measurement data at the measurement point is judged as an abnormal value and the measurement result at that measurement point is removed. The processing method of the profile measurement data of the blast furnace interior entrance according to any one of claims 1 to 3.

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