[0029] Please refer to FIG. 2, FIG. 3A and FIG. 3B together, which are respectively a flowchart of a method for measuring the blanking trajectory of a blast furnace according to an embodiment of the present invention, and a flowchart according to an embodiment of the present invention. A grid image of a blast furnace and a blast furnace mechanical diagram corresponding to the grid image of the blast furnace in Figure 3A. In this embodiment, when the method 200 for measuring the blanking trajectory of a blast furnace is performed, as described in step 202, for example, at least two strong light sources 302 and 304 are used to form several light beams 314 and 316 in the blast furnace 308, respectively. , As shown in Figure 3A and Figure 3B. These beams 314 and 316 cross each other to define a grid plane 320 inside the blast furnace 308. In an exemplary embodiment, the strong light sources 302 and 304 may be laser emitters, for example.
[0030] Then, as described in step 204 of the measurement method 200, a camera (not shown) is installed at the position of the blast furnace 308 where the panorama of the grid plane 320 can be photographed. The camera is used to photograph the inside of the blast furnace 308, thereby obtaining images of the light beams 314 and 316 and the grid plane 320 formed by the light beams 314 and 316.
[0031] Next, the grid intersection 318 of at least four points is marked on the grid plane 320 of the grid image 300a in FIG. 3A. In the embodiment shown in FIG. 3A, a total of thirteen grid intersections 318 are marked in the grid plane 320 of the grid image 300a. Then, as described in step 206 of the measurement method 200, a number of intersections 322 are marked and defined on the mechanical drawing 300b of the blast furnace 308, as shown in FIG. 3B. The positions of the intersection points 322 respectively correspond to the grid intersection points 318 on the grid plane 320 in the grid image 300a.
[0032] Next, as described in step 208 of the surveying method 200, the corresponding parameters between the coordinates of the intersection 322 of the mechanical diagram 300b and the coordinates of the grid intersection 318 on the corresponding grid image 300a are calculated. In this calculation step, the plane coordinates of the grid intersection 318 on the grid image 300a can be set as a i = , Where i=1~N, and N is the number of grid intersections 318. In the exemplary embodiment of FIG. 3A, the number of grid intersections 318 is thirteen, so N is 13. Let the coordinates of the intersection 322 on the mechanical drawing 300b of the blast furnace 308 be b i = , Where the intersection 322 corresponds to the grid intersection 318, so i=1~N, and N is the number of grid intersections 318, and also the number of intersections 322. The correspondence between the coordinates of the grid intersection 318 and the coordinates of the intersection 322 can be expressed as ai b i. Each group of the coordinates of the grid intersection 318 and the coordinates of the intersection 322 can be represented by the following mathematical equation (1):
[0033] b i =Ha i (1)
[0034] Among them, due to a i With b i Both are a 3×1 matrix, so H is a 3×3 matrix, and H is used to represent ai b i Corresponding parameters for conversion between. In some embodiments, the corresponding parameter H can be solved by a general Direct Linear Transformation (DLT) or other nonlinear optimization methods.
[0035] Next, please refer to Figures 4A and 4B, which respectively show a grid image of a blast furnace when a distribution channel is placed according to an embodiment of the present invention, and a blast furnace grid image corresponding to Figure 4A Blast furnace mechanical drawing. When the distribution channel 306 of the blast furnace 308 is distributed from above the blast furnace 308, the distribution channel 306 will rotate in a concentric manner, and the material flow 324 will cut off the grid plane 320 formed by the light beams 314 and 316. At this time, the light beams 314 and 316 will hit the material stream 324, thereby forming a plurality of outer edge bright spots 310 and a plurality of inner edge bright spots 326, as shown in FIG. 3A. The measurement method 200 then, as described in step 210, captures the outer edge bright spots 310 and the inner edge bright spots 326 formed by the beams 314 and 316 hitting the stream 324 according to the grid image 300a, and finds these outer edge bright spots The coordinates of 310 and the inner edge bright spot 326 on the grid plane 320.
[0036] Then, as described in step 212 of the measurement method 200, using equation (1)b i =Ha i , And use the corresponding parameter H calculated in step 208, and the coordinates of the outer edge bright spot 310 and the inner edge bright spot 326 on the grid plane 320 (ie equation (1) b i =Ha i A in i ), and the coordinates of the outer edge bright spot 310 and the inner edge bright spot 326 on the grid plane 320 are respectively calculated to correspond to the outer edge bright spot 312 and the corresponding inner edge bright spot 328 in the mechanical drawing 300b of the blast furnace 308 in FIG. 4B.
[0037] Then, as described in step 214 of the measurement method 200, a computer device is used to perform curve fitting processing on the coordinates of the outer edge bright spot 312 and the coordinate corresponding to the inner edge bright spot 328 in the mechanical drawing 300b, respectively, so as to obtain the material flow 324 The outer edge trajectory curve 330 and the inner edge trajectory curve 332 of, as shown in Figure 4B. In an embodiment, a quadratic curve equation can be used to perform the fitting process of the outer edge trajectory curve 330 and the inner edge trajectory curve 332 of the stream 324. Therefore, the outer edge trajectory curve 330 and the inner edge trajectory curve 332 can be respectively represented by a parabolic quadratic polynomial.
[0038] It can be seen from the above-mentioned embodiments of the present invention that one advantage of the present invention is that the method for measuring the blanking trajectory of the blast furnace of the present invention uses a plane conversion method to convert the grid coordinates of the image and the coordinates of the blast furnace mechanical drawing. Therefore, the time to map the material flow trajectory coordinates on the image to the blast furnace mechanical drawing can be greatly reduced.
[0039] As can be seen from the above-mentioned embodiments of the present invention, another advantage of the present invention is that in the method for measuring the blanking trajectory of the blast furnace of the present invention, the coordinate conversion uses the plane conversion method, which can effectively avoid the error of human judgment. The invented method can effectively improve the accuracy of blast furnace material flow trajectory measurement.
[0040] As can be seen from the above-mentioned embodiments of the present invention, another advantage of the present invention is that the method for measuring the blanking trajectory of a blast furnace of the present invention can provide highly accurate material flow outer edge curve and material flow inner edge curve, and use the material flow The outer edge curve and the inner edge curve of the material flow can assist the on-site staff of the blast furnace to set the required material surface shape, thereby improving the production efficiency of the blast furnace.
[0041] Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in this technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
