JPH033756B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting abnormalities such as short circuits in electrodes in electrolytic refining of metals.

[Conventional technology]

A conventional device for detecting an abnormality in the electrodes of a metal electrolytic refining tank is shown in Japanese Patent Publication No. 57-37361. FIG. 5 shows details of the electrode section of the above device. In the figure, the positive electrode 1 is the crude metal to be refined.
01 is a power supply unit 103 connected to the positive pole of the power supply
is placed so that it is in contact with the Also, the negative electrode 1
02 is a power supply unit 104 connected to the negative pole of the power supply
The conductor rod 106 is made to come into contact with.
In one electrolytic cell 107, several tens of pairs of the positive electrode 101 and negative electrode 102 are arranged side by side and immersed in the electrolytic solution 105. The above electrolytic cell 10
7 has a large number of tanks arranged, for example, 96 tanks vertically and 4 tanks horizontally, for a total of 384 tanks, to form a set of electrolytic refining equipment. Although the distance between the positive electrode 101 and the negative electrode 102 is set to 3 to 4 cm in order to improve the efficiency of electrolytic refining, a short circuit may occur between the two electrodes due to various reasons. In order to detect such a short circuit, in the conventional device described above, the current increases due to the short circuit, and the heat generating portion 106a of the conductor bar 106 generates heat, which is higher than the heat generating portion 106a of the conductor bar 106 of the normal cathode 102. It is configured to detect the generation of strong infrared rays using an infrared thermometer.
The infrared thermometer 114 is attached to the crane 1 shown in FIG.
10 is loaded on a trolley 113 that can be moved in the direction of the arrow 112 indicating the left and right direction.For example, when inspecting the electrolytic cell 107, it is stopped directly above the electrolytic cell 107 as shown in the figure, and the dotted line 124A The range indicated by
The heat generating portions 106a are sequentially inspected, for example, from the left end to the right end. When the inspection of one electrolytic cell 107 is completed, the crane 110 travels a predetermined distance in a direction perpendicular to the plane of the paper, stops directly above the next electrolytic cell 107, and performs the measurement again. Crane 11 like this
The vehicle is configured to inspect all of the electrolytic cells 107 in 96 columns and 4 rows by traveling in a direction perpendicular to the plane of the paper and by traveling in the direction of arrow 112 of the trolley 113.

[Problem that the invention seeks to solve]

The conventional device described above has a crane 110 for each tank.
Also, since the trolley 113 is stopped and scanned, it takes a long time to inspect all the tanks.

[Means for solving problems]

The abnormality detection device for electrodes in metal electrolytic cells according to the present invention images a plurality of electrolytic cells each having at least one pair of electrodes using an infrared video camera mounted on a transport device, and detects the vertical position of the electrolytic cells. a position detection means is provided on the conveying device, and each electrolytic cell is provided with at least one pair of infrared light generating means for detecting the lateral position of the electrolytic cell;
By dividing the distance between the images of the pair of infrared light generating means taken by the above-mentioned infrared video camera by the number of electrodes in the electrolytic cell, a scale corresponding to the position of each electrode in the image of the electrolytic cell can be calculated. A means for generating a graphic scale signal generates a graphic scale signal for displaying a graphic scale having the electrolytic cell, and means for displaying the image of the electrolytic cell and the graphic scale on the same display surface.

[Effect]

Abnormally heating parts of the electrolytic cell can be detected using images taken by an infrared video camera of the electrolytic cell, and electrodes that are generating abnormal heat can be identified using a graphic scale.

[Embodiment] FIGS. 1 and 2 show block diagrams of embodiments of a recording apparatus R and a reproducing apparatus P of the present invention. The infrared video camera 1 of the recording device R is a device that detects infrared rays and outputs a video signal. is loaded on. The crane 20 is supported by a rail 3 so as to be movable in the direction of arrow B while maintaining a predetermined height above the electrolytic cell arranged on a plane. In this embodiment, there are 12 electrolytic cells in total, 3 rows horizontally and 4 rows vertically, and they are loaded onto the trolley 21 by moving the crane 20 in the direction of arrow B and moving the trolley 21 in the direction of arrow A. The infrared video camera 1 detects all the electrolytic cells 31A to 31T, 32T to 32A, 33.
Images can be taken in the order of A to 33T. A large number of electrodes 2 are arranged in the electrolytic cell 31A, and the arrangement is similar to that of the conventional example shown in FIG. Crane 20 is arrow B
When moving in the direction, for example, a proximity switch 22 provided on the crane 20 as a detection means for detecting the vertical position of the electrolytic cell outputs a signal every time it passes a detection piece 4 provided on the rail 3. It is done like this. The imaging range of the infrared video camera 1 is set so as to capture an image of one electrolytic cell 31A from above the cart 21 on its screen.
The output signals of the infrared video camera 1 and the proximity switch 22 are recorded by a videotape recorder 23, and the output signal of the proximity switch 22 is recorded as a pulse signal on the audio track of the videotape. FIG. 2 shows the configuration of a reproducing apparatus P for reproducing a videotape recorded as described above. The video output of the video tape player 41 is provided by the image synthesis circuit 5.
The signal from the proximity switch 22, which is applied to the CRT 42, which is a color display device using a cathode ray tube, via the CRT 1 and recorded on the audio track, is sent to the central processing unit (hereinafter abbreviated as CPU) CPU 44 for performing arithmetic processing. is input. keyboard 44
is a device for inputting instructions to the CPU 43. The pointing device 45 is used to create a graphic scale (to be described later) in advance.
3, the CPU 43 calculates the scale coordinate signal and stores the data in the scale memory 47. The signal of the proximity switch 22 recorded on the video tape is converted into a tank address by the CPU 43 and displayed digitally on the digital display device 48. The scale frame memory 49 stores graphic scale data read out from the graphic scale memory 47 so as to be displayed at a predetermined position on the CRT 42 with an accuracy comparable to that of pixels. The image synthesis circuit 51 is a circuit that synthesizes the video signal output from the video tape player 41 and the output of the scale frame memory 49. The scale position adjustment knob 50 is a device for adjusting the scale position on the CRT 42. Hot points 5, 5' are
It is a point light source that emits infrared rays for imaging by an infrared video camera that is configured not to detect light other than infrared rays such as visible light, which is a noise component. One pair is provided.

Next, the operation will be explained. In the metal electrolysis apparatus shown in FIG. 3, when investigating abnormal heat generation in the electrodes, for example, the crane 20 is moved so that the infrared video camera 1 is placed directly above the upper left electrolytic cell 31A. At this time, the proximity switch 22 is operated by the detection piece 4. When started in this state, the crane 20 starts to move downward in the figure (in the direction of the electrolytic cell 31T), and the images of the electrolytic cells 31A, 31B, 31C, etc. captured by the infrared video camera 1 are captured by the crane 20.
As the video tape recorder 23 moves,
recorded by. Further, as the crane 20 moves, the proximity switch 22 is operated by the detection piece 4 provided for each electrolytic cell and outputs a pulse signal, which signal is recorded by the audio track of the video tape recorder 23. . When the infrared video camera is imaging the upper left electrolytic cell 31A, hot points 5 and 5' within the imaging range are also imaged at the same time and recorded as a video signal. The crane 20 moves to the position of the lowest electrolytic cell 31T in FIG.
After completing the imaging of ~31T, the trolley 21 moves to the right, and this time images are sequentially taken and recorded upward from the electrolytic cell 32T.

Next, the abnormality detection work will be explained with reference to FIG. When the recording tape of the video tape recorder 23 is played back by the video tape player 41, the video signal is
The voltage is applied to the CRT 42 and displayed on the cathode ray tube, but since the crane 20 is continuously moving,
The image on the CRT42 is constantly moving from top to bottom in the diagram. When visually observing such an image, when the moving screen is observed and the abnormal heat generating part is displayed in red, the video tape player 41 is set to still image mode and observed. FIG. 4A shows an example of a display screen by the CRT 42. In the figure, an image of an electrolytic cell image 60 is displayed on a screen 65. Since the infrared video camera 1 detects only infrared rays, for example, the hot point 5 is displayed as a point 66A in the image of the electrolytic cell 31A, and the abnormal electrode is displayed as a point 66B in red if it is particularly bright or colored. , indicates that abnormal heat generation is occurring at a point 66B in the electrolytic cell image 60. At this time,
The digital display device 48 in FIG. 2 displays "1", indicating that this image is the one on the top row. On the other hand, the CPU 43 stores the scale frame memory 49 as shown in FIG. 4A based on the data in the graphic scale memory 47.
Graphic scale 61 on the CRT42 screen
Generates a graphic scale signal to display. The graphic scale 61 can also display an identification mark 63 every 10 divisions, for example. Therefore, after aligning the left end reference line of the scale displayed by operating the scale position adjustment knob 50 with the hot point image 66A, it is determined that the point 66B is the sixth electrode from the left by comparing it with the point 66B. . Since the cart 21 always moves in the above-mentioned trajectory order, whether the current screen is for the 31st column or the 33rd column is calculated by the CPU as follows.

That is, as mentioned above, the trolley 21 shown in FIG.
The trajectory is set to always start from electrolytic tank 31A, so for example, from electrolytic tank 31
Assuming that T is the 31st tank from the top, the displayed value on the digital display device 48 will be "31". Next, when the cart passes through the electrolytic cell 32T, the display on the digital display device 48 changes to "32". When the cart reaches the electrolytic cell 32A, "62" will be displayed. Therefore, by assigning serial numbers to the tanks in advance, it is easy to know which tank is displayed.

Next, a method of creating the above-mentioned graphic scale will be explained. First, a pair of hot points 5 and 5' of the electrolytic cell 31A shown in FIG. 3 are simultaneously imaged by the infrared video camera 1 shown in FIG. This is once recorded and then played back by the videotape player 41 shown in FIG. 2 and displayed on the screen 65 shown in FIG. 4A. Then, the light pen 46 of the pointing device 45 shown in FIG. 1 points to both hot point images 66A and 66A' on the screen 65. Then, numerical data representing the distance between the hot points 5 and 5' is input to the CPU 43. Next, when the number of electrodes in the electrolytic cell 31A is input from the keyboard 44 and a calculation instruction is given, the CPU 43 performs a calculation to divide the distance between the hot points 5 and 5' by the number of electrodes, and scales the scale coordinates and the scale number. It is stored in the frame memory 49 for use. The graphic scale 61 for the electrolytic cells 31A to 31T is formed based on the hot points 5 and 5'.
Since the graphic scale 61 from A to 32T is formed based on the hot points 6 and 6',
Even if a slight error occurs in the position of the truck 21 when the crane 20 moves and stops, no error occurs in the graphic scale 61. Also, without using hot points 5 and 5', graphic scale 61
When forming the pointing device 4
It is also possible to create a virtual electrode by specifying the position of the virtual electrode on the screen of the CRT 42 using the light pen 46 of 5. As a type of scale, coordinates can be displayed on the screen 65 of the CRT 42 using a point image 68 as shown in FIG. 4B.

(Effects of the Invention) As explained above, according to the present invention, a crane equipped with an infrared video camera takes images while moving without stopping each electrolytic cell.
Many electrolytic cells can be inspected in a short time. Furthermore, since the graphic scale obtained based on the infrared light generating means is displayed on the same screen, the position of the abnormal electrode can be easily and quickly determined.

[Brief explanation of the drawing]

1 and 2 are block diagrams showing a recording device and a reproducing device according to an embodiment of this invention, FIG. 3 is a diagram showing a metal electrolytic device according to an embodiment of this invention, and FIG. 4A
4B is a diagram showing one line of display in an embodiment of the present invention, FIG. 5 is a diagram showing the configuration of an electrolytic cell in a conventional example, and FIG. 6 is a diagram showing the configuration of a conventional crane. It is. 1: Infrared video camera, 4: Detection piece, 5: Hot point, 20: Crane, 22... Proximity switch, 31A: Electrolytic cell, 42: CRT, 47: Graphic scale memory.

Claims (1)

[Scope of Claims] 1. An infrared video camera arranged to move and sequentially capture images of a large number of electrolytic cells each having at least one pair of electrodes, a transport device for two-dimensionally moving the infrared video camera, and an electrolysis device. a position detection means provided on the conveying device for detecting the vertical position of the cell; at least one pair of infrared light generating means provided on each electrolytic cell for detecting the lateral position of the electrolytic cell; By dividing the distance between the images of the pair of infrared light generating means captured by the above-mentioned infrared video camera by the number of electrodes in the electrolytic cell, the position of each electrode in the image of the electrolytic cell is determined. An abnormality detection device for an electrode in a metal electrolytic cell, comprising means for generating a graphic scale signal for displaying a graphic scale having graduations, and means for displaying an image of the electrolytic cell and the graphic scale on the same display screen. 2. The metal electrolytic device according to claim 1, comprising a recording means for recording an image of the electrolytic cell and an image of the infrared light generating means using an infrared video camera, and a detection signal of a position detecting means provided on the transport device. Electrode abnormality detection device in a tank.