JPH0283421A - Monitor apparatus for charged substance of shaft furnace - Google Patents

Abstract

PURPOSE:To judge the gas flow state in a shaft furnace on a display picture by displaying the position of a furnace core on the display image of temp. distribution by calculating the vertical scanning angle of an infrared detector and detecting the distance up to the furnace core from the arrangement level of the infrared detector in a vertical direction. CONSTITUTION:Each start position of a horizontal scanning line is set by a horizontal direction alignment counter 11 to perform counting by a horizontal direction display position counter 12 and a furnace core mark is displayed at the center of a picture while the width of an X-mark in a horizontal direction is determined by a horizontal direction mark width counter 13. A sounding position is detected by a sounding position detection part 14 and the interval in a vertical direction is determined by a vertical direction alignment counter 15. Further, it is determined what number of a horizontal scanning lines the furnace core mark corresponds to, by a vertical direction display position counter 16 and the pixel in the vertical direction of the furnace core mark is determined by a vertical direction mark width counter 17. The outputs of the counters 16, 17 are applied to a marker generator 18 and the display position of the furnace core mark is determined. This data is sent to an output gate 19 and the furnace core mark due to the X-mark is displayed on the picture due to temp. distribution through a display control part.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a blast furnace charge equipped with a means for displaying the core position in an image in which the surface temperature distribution of the blast furnace charge is identified and displayed based on the temperature difference. The present invention relates to a monitoring device.

[Prior art] For blast furnaces, it has been proposed to adopt a thermography device as a means of monitoring the situation inside the furnace (Japanese Patent Publication No. 5
9-4652), such a device optically scans the blast furnace charge (coke, iron ore, etc.) that is the subject, detects infrared rays from the subject, and based on the detection results, the surface of the blast furnace charge is detected. It is configured to calculate the temperature distribution and display a surface temperature distribution image on a display such as a CRT.

The configuration of a monitoring device using this type of thermography device is as shown in FIG. An infrared television camera 2 is installed diagonally above the blast furnace 1 so as to be able to scan in the direction of depression, and its output signal is converted into a temperature signal by a temperature signal converter 3. The output signal of the temperature signal conversion section 3 is used by the arithmetic control section 4 to calculate the maximum temperature position, area ratio for each temperature band, etc., and to control the scanning mechanism 7 according to the progress of the process.

Based on the calculation result of the calculation control part 4, the display control part 5 displays a temperature distribution image as shown in the figure on the monitor 6. The operator operates the blast furnace with reference to the image content on the monitor 6.

[Problem to be solved by the invention] In the conventional blast furnace charge monitoring device as described above,
The status of the gas flow in the reactor is determined based on the positional relationship of the temperature distribution display image to the reactor core.Since the core position cannot be directly seen and is not displayed on the display image, the gas flow status can be grasped. It was difficult to do so. In this case, since the camera is taking images from diagonally above, the center of the temperature distribution display image does not match the core position. Therefore, it is impossible to determine the core position only from the temperature distribution display image. Can not.

This invention was made in order to solve such conventional problems, and is a blast furnace that enables the core position to be displayed on the display image of the temperature distribution, and the gas flow situation in the blast furnace to be judged from the display screen. The purpose is to provide a charge monitoring device.

[Means for Solving the Problems] In order to achieve the above object, the present invention calculates the vertical scanning angle of the infrared detection device based on the sounding level of the blast furnace and the number of horizontal scanning lines, and calculates the vertical scanning angle in the vertical direction. The apparatus is equipped with a position detecting means for detecting the distance to the core from the installation level of the infrared detecting device, and a display means for displaying the core position determined by the detecting means in the image of the surface temperature distribution.

[Operation] By configuring as described above, the position of the reactor core is calculated as to which horizontal scanning line it corresponds to according to the depression angle change of the infrared detection device, and the position of the reactor core is located on the horizontal scanning line and on the core center line. A location mark is displayed. This makes it possible to accurately determine the core position regardless of changes in the level of the charge.

[Embodiment] FIG. 1 is a block diagram showing the main configuration of an embodiment of the present invention.

FIG. 1 shows a core position detecting section 10 including a position detecting means and a display means according to the present invention, and its output is applied to a display control section 5.

As shown in FIG. 2, the blast furnace l has an inner radius R at the camera installation position, and the surface level of the charge moves up and down in the furnace while keeping the center portion in an inverted conical shape.

The camera installed outside the furnace diagonally above the blast furnace 1 has an oscillation angle (scanning angle) of 27 degrees in the depression direction, and the upper limit position is set at a position 31.5 degrees lower than the horizontal plane.

The sounding level of the charge constantly fluctuates, for example vertically fluctuating up and down from point 0 to point D. In the infrared television camera 2 shown in FIG. 4, the center of the camera lens is located at point P in FIG. 2, and the blast furnace charge is scanned within a range of 27 degrees with this point as the center of rotation. Therefore, the infrared television camera 2 can scan the surface of the charge from point A to point B.

By scanning with the infrared television camera 2, the vertical image width is defined as L from point A (top edge of the screen) to point B (bottom edge of the screen), and this width is divided into 180 parts for horizontal scanning. Therefore, as shown in FIG. 3, one image is represented by 180 horizontal scanning lines, and its vertical center is the center of the core. This horizontal core position is uniquely determined when the infrared television camera 2 is installed, and the infrared television camera 2
remains constant unless changed. From this, when the core position is indicated by a point, it is only necessary to detect which horizontal scanning line the point is on.

Specifically, it is sufficient to find the scanning angle α and determine the horizontal scanning line corresponding to this angle. The angle α is calculated by the following formula.

a = jan-'(jl/r)-: 11.5@
-(1) Here, the term is the distance from the horizontal line of the installation position of the infrared television camera 2 to the current scanning position on the core center. Further, the value of the denominator is the distance from the center of the lens of the infrared television camera 2 to the center of the reactor core. (1) The first of equation
The term is the angle from the installation level of the infrared television camera 2 to the position below the intersection.

In other words, α+31.5 (degrees) infrared television camera 2
It includes an angle (31.5 degrees) that is not scanned by.

Therefore, 31.5 degrees is subtracted so that only the actual scanning angle is obtained.

On the other hand, a sounding sensor is used as a sensor for detecting a change in the level of the charge as a change in height, and its detection output is output as a voltage value corresponding to the sounding level. In the example of FIG. 2, the 0 point is DC+IV, the D point is DC+5V, and a continuous voltage value is output between them. The number of horizontal scanning lines can be calculated using this detected voltage. The conditions for this purpose are determined as follows.

(a) Sounding detection voltage V (+DCIV~5V)
Fluctuation width v = 4V (b) Charge level fluctuation width H (c) Distance from the center of the camera lens to the core 11r (d
) Height h between the horizontal line of the center position of the camera lens and the highest level of the reactor core (e) Angle β between the horizontal line of the center position of the camera lens and the core position The number N is obtained using the following formula.

N-[180 (Thursday) / 27 (degrees)]X[tan-'
((V-1,00)x)l/v+h)/r-31,51
・-(2) (However, 180>N≧0, and N<O, N≧181
In the case of , N = 1 or N = 180) In equation (2), (180/27) is the number of horizontal scanning lines per output, and this number of lines is multiplied by the scanning angle in the second term. This tells you which line the bird is on from the start of scanning. In equation (2).

jan'''' ((V-1,00)xH/v+h)/r
corresponds to tan −' (cross/r) in equation (1), and the scanning angle can be uniquely determined from the sounding position detection signal.

Next, the configuration shown in FIG. 1 that implements equation (2) will be explained.

In Fig. 1, 11 is a horizontal alignment counter that counts down the count value set for aligning the display of the core mark (for example, an x mark) every clock (150,,), and 12 is the horizontal center 13 is a horizontal display position counter consisting of a down counter for displaying the core mark; 13 is a horizontal mark width counter that counts the horizontal pixels at the position where the core mark is to be displayed;
14 is a sounding position detection unit that A/D converts a sounding position signal from a sounding sensor (not shown);
Reference numeral 15 denotes a vertical positioning counter that counts down a count value set for display positioning of the core position mark each time the horizontal drive signal HD is input; 16 represents a sounding position detection unit 14 and a vertical positioning counter 15; 17 is a vertical display position counter that counts the number of pixels in the horizontal scanning line at which a mark should be displayed based on each output signal; 17 is a vertical mark width counter that counts vertical pixels of the core mark; 18 is a horizontal direction counter; Mark width counter 13 and vertical mark width counter 1
A marker generator 19 determines the display position of the core mark on the screen based on the output signal of 7, and an output gate 19 determines whether or not the core mark should be displayed.

In the above configuration, the horizontal alignment counter 11
Set the starting position l of each of the 180 horizontal scanning lines, and count the horizontal direction display position counter 12 from that starting point so that the core mark is displayed at the center of the screen, and the X mark The horizontal width is determined by a horizontal mark width counter 13.

On the other hand, the sounding position detection section 14 detects the sounding position, and the vertical positioning counter 15 determines the vertical interval. Further, the vertical direction display position counter 16 determines which horizontal scanning line corresponds to the vertical direction display position counter 17.
Determine the vertical pixels of the core mark.

The output of the horizontal mark width counter 13 and the output of the vertical mark radiation counter 17 are applied to the marker generator 18, and the marker generator 18 determines the display position (horizontal direction + vertical direction) of the core mark. This core mark position information is sent to the output gate 19, and the display control unit 5 receives the mark 0N-OFF signal given from the outside.
It is determined whether the output should be output or not. When ON is selected, an X-shaped core mark is displayed on the screen based on the temperature distribution.

In the configuration shown in Figure 1, formula (2) is obtained as a result, but the functional operation according to formula (2) is not performed. The core mark may be obtained by programming equation (2) using a computer. In this case, it will be connected to the configuration shown in FIG. 4 via an interface.

[Effect of the Invention 1] As explained above, the present invention calculates the vertical scanning angle of the infrared detection device based on the sounding level of the blast furnace and the number of horizontal scanning lines, and calculates the vertical scanning angle of the infrared detection device based on the installation level of the infrared detection device in the vertical direction. Since the configuration is provided with a position detection means for detecting the distance to the temperature distribution and a display means for displaying the core position determined by this detection means in the image of the surface temperature distribution, a core position mark is displayed on the temperature distribution screen. This makes it possible to recognize the flow status of gas in the furnace, making stable blast furnace operation easier.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the main configuration of an embodiment of the present invention, Figure 2 is an explanatory diagram showing changes in the charge of the blast furnace and the installation status of an infrared television camera, and Figure 3 is a horizontal scanning line of one screen. FIG. 4 is a block diagram showing a schematic configuration of a conventional blast furnace charge monitoring device. In the figure. l: Blast furnace 2 Infrared television camera 3: Temperature signal conversion section 4: Arithmetic control section 5: Display control section 6: Monitor 10: Core position detection section 11: Horizontal alignment counter 12: Horizontal display position counter 1 horizontal Direction Mark Width Counter Sounding Position Detector Vertical Alignment Counter Vertical Display Position Counter Vertical Mark Width Counter Marker Generator Output Gate Agent Patent Attorney 1) Haru Kitatake

Claims (1)

[Claims] The blast furnace charge is optically scanned by an infrared detection device to detect infrared rays from the blast furnace charge, and an image of the surface temperature distribution of the blast furnace charge is displayed on a display device based on the detection result. In a blast furnace charge monitoring device equipped with a blast furnace charging function, the vertical scanning angle of the infrared detection device is calculated based on the sounding level of the blast furnace and the number of horizontal scanning lines, and the vertical scanning angle of the infrared detection device is calculated based on the installation level of the infrared detection device in the vertical direction. 1. A monitoring device for a blast furnace charge, comprising: a position detecting means for detecting the distance to the blast furnace charge; and a display means for displaying the core position determined by the detecting means in the image of the surface temperature distribution.