TWI431119B - Method of measuring the width of material - Google Patents

Description

Method for measuring flow width

The invention relates to a measuring method, in particular to a method for measuring the width of a stream.

The cloth operation mode of the blast furnace affects the structure of the material layer and the distribution of the furnace gas. If the outer edge curve of the material flow can be provided at each angle, the width of the material flow and the center line of the flow can be defined. Understand the information of the flow point and assist the field operator to control the geometry of the material surface, thereby improving the gas permeability of the material surface, increasing the gas utilization rate, and stabilizing the heat load of the furnace wall.

The flow trajectory measurement is mostly carried out in the filling material investigation before the blast furnace is opened. The method of measuring the flow trajectory in the past is to use the metal crossbar striking method. First, the paint is applied at equal intervals on the metal crossbar. The reference of the size, after which, the metal crossbar is inserted into the blast furnace. When the blanking strikes the crossbar, the metal crossbar is pulled out to know the position of the blanking point on the metal crossbar; The method is the cross-network grid measurement method, which is to set up a cross network in the blast furnace to serve as a reference for the coordinates to understand the position of the blanking. However, this method requires a support frame to fix the cross network, so When the fabric trough traverses the support frame, the blanking will directly contact the support frame, thereby affecting the location of the site; in addition, there is a method of arranging a receiving box at the position of the blast furnace zero line. The material to be taken determines the trajectory of the charge; in addition, there is another method to develop a measuring rod. The measuring rod is connected to a load detector outside the furnace, and the related recording system. When the material is cut, the charge will hit. Measuring rod in the furnace By generating load signals of different intensities at different positions, the operator determines the drop point and then simulates the flow trajectory; the contact measurement method described above not only causes problems in the work safety, but also accuracy. It is also not ideal, which affects the efficiency of its measurement.

Accordingly, it is an object of the present invention to provide a method for measuring the width of a stream which can improve production efficiency.

Therefore, the method for measuring the width of the flow of the present invention is suitable for setting a laser range finder capable of emitting a plurality of laser scanning surfaces above a blast furnace, and the laser range finder is electrically connected to a computer. The method includes a scanning step and a calculating step.

The scanning step is to use the laser range finder to scan a stream falling from a distribution groove in a three-dimensional space, so that a plurality of laser scanning surfaces of the laser range finder intersect the stream to form a plurality of proximal ends. The track point group and a plurality of remote track point groups are transmitted to the computer.

The calculating step is to calculate a near-end stream curve by overlapping the near-end trajectory point group, and to calculate a far-end stream curve by overlapping the far-end trajectory point group, and then using the near-end stream curve and The distal flow curve calculates the width of the stream.

The utility model has the advantages that the flow measuring and scanning of the stream is performed by using the laser range finder, and the near-end and the far-track point group of the stream can be obtained, and the near-end flow curve is calculated by using a computer at the same time. The distal flow curve, in turn, can know the width of the stream and know the location of the stream, thereby improving the production efficiency of the blast furnace.

The foregoing and other objects, features, and advantages of the invention are set forth in the <RTIgt;

Referring to Figures 1 and 2, a preferred embodiment of the method for measuring the flow width of the present invention is suitable for placing a laser range finder 301 capable of emitting a plurality of laser scanning surfaces above a blast furnace 302 (i.e., a blast furnace port 301, wherein the laser range finder 301 is electrically connected to a computer (not shown), and the vertical scanning range of the plurality of laser scanning surfaces of the laser range finder is 0° to 80°. The method includes a scanning step 201 and a computing step 202.

The scanning step 201 uses the laser range finder 301 to perform a three-dimensional scanning of the stream dropped by a distribution slot 303, and the distribution slot 303 is rotated along the center line (ie, the X axis) of the blast furnace 302, and The inside of the blast furnace 302 is clothed such that the flow discharged from the distribution tank 303 is between a proximal end position close to the laser range finder 301 and a distal position away from the laser range finder 301. Rotating movement, when the flow discharged by the distribution slot 303 is at the proximal end position as shown in FIG. 3, the majority of the laser scanning surface of the laser range finder 301 intersects with the flow of the distribution groove 303 to form a majority. a group of proximal track points, when the stream ejected by the distribution slot 303 is at a remote position as shown in FIG. 4, the majority of the laser scanning surface of the laser range finder 301 and the stream of the distribution slot 303 The intersection forms a plurality of distal trajectory point groups, and then the near trajectory point group and the far trajectory point group are transmitted to the computer, it is worth mentioning that the computer can The group and the remote track point group are converted into a coordinate system as shown in FIG. 2, wherein the X axis is based on the center of the blast furnace 302.

Referring to FIG. 1, 2, and 5, in the calculating step 202, the near-end track point group and the far-end track point group are overlapped, and the laser range finder 301 is filtered out as shown in FIG. a group of points scanned by the furnace wall and the material surface of the blast furnace 302, wherein each of the proximal trajectory point groups has a plurality of proximal flow data points, and the near-end trajectory point group is close to the The proximal flow data point of the furnace wall of the blast furnace, and thereby calculating the proximal flow curve L1 as shown in FIG. 5, each remote trajectory point group has a plurality of remote flow data points, at the far Extracting a remote flow data point close to the furnace wall of the blast furnace, and calculating the remote flow curve (not shown), and then following the remote flow curve The center line of the blast furnace 302 (i.e., the X-axis) is reversed to form a reversed distal flow curve L2 as shown in Fig. 5, and the reversed distal flow curve L2 and the proximal flow curve L1 are utilized. Calculate the horizontal spacing between the two and define the width H of the stream, and calculate a flow of the proximal flow curve L1 and the reverse distal flow curve L2. Center line L3.

In summary, the laser range finder 301 is used to measure the flow of the material flowing out of the distribution tank 303, and the near-end and far-end trajectory points of the stream can be obtained, and the computer is simultaneously utilized. Calculating the proximal flow curve L1 and the reverse distal flow curve L2, and further knowing the width H of the stream and knowing the position of the falling point of the stream, thereby improving the production efficiency of the blast furnace 302, so it can be achieved. The object of the invention.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

201. . . Scanning step

202. . . calculation steps

301. . . Laser range finder

302. . . blast furnace

303. . . Cloth trough

304. . . Noodle

L1. . . Proximal flow curve

L2. . . Reverse remote flow curve

H. . . width

Figure 1 is a flow chart showing a preferred embodiment of the method for measuring the flow width of the present invention;

Figure 2 is a schematic view showing the arrangement of the laser range finder in the blast furnace;

Figure 3 is a schematic view showing the flow of the preferred embodiment of the material in a proximal position;

Figure 4 is a schematic view showing the flow of the preferred embodiment of the material at a distal end; and

Figure 5 is a schematic diagram showing the proximal flow curve and the reverse distal flow curve calculated in the preferred embodiment.

201. . . Scanning step

202. . . calculation steps

Claims (8)

A method for measuring a width of a flow, which is suitable for setting a laser range finder capable of emitting a plurality of laser scanning surfaces above a blast furnace, wherein the laser range finder is electrically connected to a computer, and the method comprises The following steps: a scanning step, using the laser range finder to perform a three-dimensional scanning of a falling stream of a cloth groove, so that a majority of the laser scanning surface of the laser range finder intersects with the stream to form a majority a proximal trajectory point group and a plurality of distal trajectory point groups are transmitted to the computer; and a calculating step of overlapping the proximal trajectory point group to calculate a proximal flow curve, overlapping the distal end A remote flow curve is calculated from the track point group, and then the width of the flow is calculated using the near-end flow curve and the distal flow curve. According to the measuring method of the flow width according to Item 1 of the patent application, in the scanning step, the cloth groove is rotated along the center line of the blast furnace, and the cloth is clothed in the blast furnace to make the cloth The stream ejected from the trough is rotationally moved between a proximal end position adjacent to the laser range finder and a distal position remote from the laser range finder, and the near portion is measured by the laser range finder The end track point group and the far end track point group. According to the measuring method of the flow width according to the second aspect of the patent application, the computer can convert the near-end trajectory point group and the far-end trajectory point group into a coordinate system based on the blast furnace. According to the method for measuring the flow width according to item 3 of the patent application scope, in the calculating step, the proximal track point group and the far track point group are overlapped, and the laser range finder is filtered out on the cloth. The group of points scanned by the trough, the furnace wall of the blast furnace and the material surface. According to the measuring method of the flow width according to item 4 of the patent application scope, in the calculating step, each of the proximal trajectory point groups has a plurality of proximal flow data points, among the near-end trajectory points Draw a near-end stream data point close to the furnace wall of the blast furnace and calculate the near-end flow curve. According to the measuring method of the flow width according to item 5 of the patent application scope, in the calculating step, each remote trajectory point group has a plurality of remote stream data points, among the remote trajectory point groups A remote flow data point approaching the furnace wall of the blast furnace is taken and the remote flow curve is calculated. According to the method for measuring the flow width according to item 6 of the patent application scope, in the calculating step, the remote flow curve is reversed along the center line of the blast furnace to form a reversed distal flow curve. The horizontal spacing between the inverted distal flow curve and the proximal flow curve is then calculated and defined as the width of the stream. According to the measuring method of the flow width according to Item 7 of the patent application, in the calculating step, the angle of the vertical scanning range of the plurality of laser scanning surfaces of the laser range finder is 0° to 80°.