JP2014054641A - Discrimination apparatus and discrimination method for discriminating between molten metal and foreign matter stored in furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discrimination device and a discrimination method capable of discriminating between a molten metal lump and an oxide floating on a liquid surface of molten metal stored in a furnace such as a melting furnace or a holding furnace and the like, or attached to a wall surface of the furnace.SOLUTION: A discrimination apparatus includes: a camera 1 which images from a liquid surface Ka of molten metal K across a wall surface Ra of a furnace R; and an image processing device 2 which detects foreign matter P floating on the liquid surface Ka of the molten metal K or attached to the wall surface Ra of the furnace R from an image imaged by the camera 1, and discriminates the detected foreign matter P into a molten metal lump M and a molten metal oxide L based on a discrimination element comprising at least one of glossiness, a color and a shape.

Description

  The present invention relates to an identification device and an identification method for identifying a metal melt and foreign matter stored in a furnace, for example, a metal melt stored in a furnace such as a melting furnace or a holding furnace, and floating on a liquid surface of the metal melt. The present invention relates to an identification device and an identification method for identifying a foreign substance attached to a wall surface of a furnace.

  Conventionally, in order to manufacture a high-quality cast product, various measures for suppressing the mixing of oxides and the like have been applied to the molten metal filled in the mold.

  As conventional techniques for such measures, Patent Documents 1 and 2 disclose techniques for removing oxides formed on the liquid surface of the molten metal in the injection sleeve or holding container of the flame injection casting machine. . Patent Document 3 discloses a technique for removing deposits formed on the inner surface of a metal melting mold.

  The molten metal hot water supply method disclosed in Patent Document 1 uses an oxide film removing device provided at the tip of the ladle when the ladle is tilted to supply the molten metal into the injection sleeve and then returned to the position before the hot water supply. In this method, the oxide film floating on the molten metal surface in the injection sleeve is captured and removed from the molten metal.

  In addition, the casting method disclosed in Patent Document 2 inserts a dedicated jig attached to an operating machine separate from the water heater toward the liquid level of the molten metal poured and stored in the holding container, The oxide film formed on the surface of the molten metal is captured so as to be scooped by the dedicated jig, and the molten metal scooped at the same time as the oxide film is dropped from the dedicated jig and returned to the holding container, and the oxide film is captured. In this method, the molten metal in the holding container is injected into the mold to mold the cast product.

  Further, the mold cleaning apparatus disclosed in Patent Document 3 is equipped with an image processing sensor for detecting the surface condition of the inner surface of the mold at the tip of the robot arm on which the scraping jig is mounted, and optical reflection from the inner surface of the mold. It is a device that detects the surface state of the inner surface of the mold by detecting the strength.

Japanese Patent Laid-Open No. 2006-110568 JP 2009-142844 A JP 2010-201468 A

  According to the molten metal hot water supply method disclosed in Patent Document 1, an oxide film that floats on the surface of the molten metal in the injection sleeve by the oxide film removing device provided at the tip of the ladle using the hot water supply and return operation of the ladle. Can be removed from the molten metal for each casting, and the oxide film can be prevented from being caught in the cast product.

  Moreover, according to the casting method disclosed in Patent Document 2, the molten metal scooped at the same time as the oxide film is dropped from the dedicated jig while the oxide film formed on the melt surface is captured by the dedicated jig. By returning to the holding container, it is possible to obtain a cast product with less mixing of oxides and excellent mechanical properties.

  In addition, according to the mold cleaning apparatus disclosed in Patent Document 3, the surface state of the inner surface of the mold can be accurately and quantitatively grasped by using an image processing sensor, That is, it is possible to accurately grasp the end point when the inner surface of the mold is finished using the scraping jig.

  By the way, on the liquid surface of the molten metal in the injection sleeve or the holding container, or on the wall surface of the injection sleeve or the holding container, there is a molten metal lump formed by solidifying the material for forming the molten metal together with the above oxide film. This has been confirmed by the present inventors.

  Therefore, in the methods disclosed in Patent Documents 1 and 2, the molten metal lump floating on the liquid surface of the molten metal together with the oxide film is captured by the oxide film removing device or the dedicated jig, and the casting is manufactured. There may be a problem that the yield rate of the product is lowered and its quality is lowered.

  In addition, in the apparatus disclosed in Patent Document 3, how to identify and treat a molten metal lump and an oxide from a liquid surface of the molten metal in the mold and an adhering substance adhering to the inner surface of the mold. It is not mentioned at all.

  The present invention has been made in view of the above-mentioned problems, and is suspended by a simple method on a liquid surface of a molten metal stored in a furnace such as a melting furnace or a holding furnace or attached to a wall surface of the furnace. An object of the present invention is to provide an identification device and an identification method capable of identifying a molten metal lump and an oxide.

  In order to achieve the above object, an identification apparatus according to the present invention is an identification apparatus for identifying a molten metal stored in a furnace and a foreign object floating on the surface of the molten metal or adhering to the wall of the furnace. In the identification device comprising the molten metal solidified by the molten metal or the molten metal oxide obtained by solidifying and oxidizing the molten metal, the foreign matter extends from the liquid level of the molten metal to the wall surface of the furnace. And detecting foreign matter floating on the liquid surface of the molten metal or adhering to the wall surface of the furnace from the image taken by the imaging portion, and detecting the detected foreign matter And a discriminating unit for discriminating between the molten metal lump and the molten metal oxide based on the discriminating element comprising at least one of color and shape.

  According to the identification device described above, the identification unit has a foreign object floating on the molten metal surface or adhering to the wall surface of the furnace from the image of the molten metal surface and the furnace wall surface imaged by the imaging unit. And the foreign matter is stored in the furnace by identifying the foreign matter as a molten metal lump and a molten metal oxide based on an identification element consisting of at least one of the glossiness, color, and shape of the detected foreign matter. The molten metal lump and the molten metal oxide floating on the surface of the molten metal or adhering to the wall surface of the furnace can be precisely distinguished. In order to detect foreign matter floating on the molten metal surface or adhering to the furnace wall surface, foreign material floating on the molten metal surface and foreign material adhering to the furnace wall surface can be detected. If there is only one of the foreign matter floating on the surface of the molten metal and the foreign matter adhering to the wall of the furnace, detect only one of them. Is included.

  Further, the identification device described above includes a processing unit that is relatively movable with respect to the liquid level of the molten metal and the wall surface of the furnace, and a control unit that controls movement of the processing unit, When the identification unit identifies the foreign object as a molten metal lump, the control unit moves the processing unit, so that the molten metal lump is immersed in the molten metal and melted. . Further, the control unit moves the processing unit when the identification unit identifies the foreign matter as the molten metal oxide, and removes the molten metal oxide from the liquid surface of the molten metal or the wall surface of the furnace. It is what is supposed to do.

  According to the identification device described above, when the identification unit identifies a foreign object as a molten metal lump, the molten metal lump is immersed in the molten metal and melted by the processing unit, and is manufactured using the molten metal. The yield rate of castings can be reliably increased, and oxidation of metal melts floating on the surface of the molten metal or adhering to the wall of the furnace is suppressed, and oxides are mixed into the casting. Can be effectively suppressed. Further, when the identification unit identifies the foreign object as the molten metal oxide, the processing unit removes the molten metal oxide from the surface of the molten metal or the wall surface of the furnace, thereby floating on the molten metal surface. Alternatively, the molten metal oxide adhering to the wall surface of the furnace can be accurately removed, and the mixing of the oxide into the cast product manufactured using the molten metal is surely suppressed, thereby improving the quality of the cast product. Can be increased.

  In the identification device described above, the identification unit detects the foreign matter by comparing the image captured by the imaging unit with a master image of the liquid level of the molten metal stored in advance and the wall surface of the furnace. It is preferable that it is such.

  The identification method according to the present invention is an identification method for identifying a metal melt stored in a furnace and a foreign matter floating on a liquid surface of the metal melt or adhering to a wall surface of the furnace. A first step of imaging from the molten metal surface to the furnace wall surface, and detecting foreign matter floating on the molten metal surface or adhering to the furnace wall surface from the captured image In the second step, the foreign matter is composed of a molten metal lump obtained by solidifying the molten metal or a molten metal oxide obtained by solidifying and oxidizing the molten metal, and the detected foreign matter has a gloss, color, and shape. And a third step of discriminating between the molten metal lump and the molten metal oxide based on at least one of the identification elements.

  According to the method described above, the liquid level of the molten metal and the wall surface of the furnace are imaged, and foreign matter floating on the liquid surface of the molten metal or adhering to the wall surface of the molten metal is detected from the captured image and detected. Based on the identification element consisting of at least one of the glossiness, color, and shape of the foreign matter, the liquid of the molten metal stored in the furnace is identified by distinguishing the foreign matter into a molten metal lump and a molten metal oxide. The molten metal lump and the molten metal oxide floating on the surface or adhering to the wall surface of the furnace can be accurately distinguished.

  Further, the above-described identification method is such that when the foreign object is a molten metal lump, the molten metal lump is immersed in the molten metal and melted, or when the foreign object is a molten metal oxide, In this method, the oxide is removed from the liquid surface of the molten metal or the wall surface of the furnace.

  According to the above method, when the foreign matter is a molten metal lump, the molten metal lump is immersed in the molten metal and melted, thereby ensuring the yield rate of a cast product manufactured using the molten metal. In addition to suppressing the oxidation of the molten metal lump floating on the surface of the molten metal or adhering to the wall surface of the furnace, it is possible to effectively prevent the oxide from being mixed into the cast product. it can. In addition, when the foreign material is a molten metal oxide, the molten metal oxide is removed from the liquid surface of the molten metal or the wall surface of the furnace, so that it floats on the molten metal surface or adheres to the wall surface of the furnace. The molten metal oxide can be removed with high accuracy, and the quality of the cast product can be improved by reliably suppressing the mixing of the oxide into the cast product manufactured using the molten metal.

  The identification method described above may detect the foreign matter in the second step by comparing the captured image with a master image of the molten metal surface and the furnace wall surface stored in advance. preferable.

  Further, in the above identification method, after the molten metal lump is immersed in the molten metal and melted, the molten metal is imaged from the liquid surface of the molten metal to the wall surface of the furnace, and the foreign matter is detected from the captured image. And detecting the detected foreign matter as a molten metal lump and a molten metal oxide, or after removing the molten metal oxide from the liquid surface of the molten metal or the wall of the furnace, the liquid surface of the molten metal It is preferable that an image is taken over the wall surface of the furnace, the foreign matter is detected from the taken image, and the detected foreign matter is identified as a molten metal lump and a molten metal oxide.

  According to the above-described method, the molten metal lump is immersed in the molten metal and melted, or the molten metal oxide is removed from the liquid surface of the molten metal or the wall surface of the furnace, and then again the molten metal surface and the furnace surface. By imaging the wall surface, detecting foreign matter from the captured image, and identifying the detected foreign matter as a molten metal lump and a molten metal oxide, it is formed on the liquid surface of the molten metal and the wall surface of the furnace over time. The molten metal lump and the molten metal oxide can be reliably detected and identified.

  As can be understood from the above description, according to the identification device and the identification method of the present invention, the molten metal stored in the furnace is floated on the liquid surface of the molten metal or on the wall surface of the furnace by a simple method. In addition to identifying adhering foreign matter, foreign matter floating on the surface of the molten metal or adhering to the wall of the furnace can be identified as a molten metal lump and a molten metal oxide. For example, the molten metal The quality of the cast product can be remarkably improved when the cast product is manufactured using the.

It is the whole block diagram which showed roughly the whole structure of embodiment of the identification device of this invention. It is the partially expanded view which expanded and showed the processing hand of the manipulator shown in FIG. 1, (a) is a figure showing an example of the processing hand for immersing the molten metal lump in the molten metal, (B) is the figure which showed an example of the processing hand for removing an oxide from the liquid level of a molten metal, or the wall surface of a furnace. It is the flowchart explaining embodiment of the identification method of this invention. It is the figure which showed an example of the image imaged with the camera. It is the figure which showed an example of the master image. (A) is the figure which showed the result of binarizing the image imaged with the camera, (b) is the figure which showed the result of binarizing the master image. It is the figure which showed the difference of Fig.6 (a) and FIG.6 (b). It is the figure which showed the result of having decompress | restored the location in the captured image corresponding to the foreign material shown in FIG.

  Embodiments of an identification device and an identification method of the present invention will be described below with reference to the drawings.

[Identification Device Embodiment]
First, an embodiment of the identification device of the present invention will be described with reference to FIG. 1 and FIG.

  FIG. 1 is an overall configuration diagram schematically showing an overall configuration of an embodiment of an identification apparatus according to the present invention.

  An identification device 10 shown in the figure mainly includes a camera (imaging unit) 1 disposed vertically above a furnace R such as a melting furnace or a holding furnace, and an image processing device (identification unit) that processes an image captured by the camera 1. 2 and a processing hand 5 for processing the oxide L or the molten metal lump M that floats on the liquid surface Ka of the molten metal K stored in the furnace R or adheres to the wall surface Ra of the furnace R. A manipulator (processing unit) 3 provided at the tip 3b of 3a and a controller (control unit) 4 that controls driving of the manipulator 3 based on a signal transmitted from the image processing device 2 are provided.

  The camera 1 captures an image from the liquid level Ka of the molten metal K stored in the furnace R to the wall surface Ra of the furnace R (particularly, the inner wall surface Ra of the furnace R that contacts the molten metal K). The processed image is transmitted to the image processing apparatus 2.

  The image processing apparatus 2 detects a foreign matter P different from the molten metal K or the like from the image transmitted from the camera 1, and is based on an identification element composed of at least one of the glossiness, color, and shape of the detected foreign matter P. The foreign matter P is identified as a molten metal lump M and an oxide L. Here, the molten metal lump M is a metal having a lump shape or a film shape formed by solidifying the molten metal K, and the oxide L is one obtained by solidifying and oxidizing the molten metal K. Then, the image processing apparatus 2 transmits the identification result of the foreign matter P such as the molten metal lump M or the oxide L to the controller 4.

  When the image processing apparatus 2 identifies the foreign matter P as the molten metal lump M, the controller 4 drives the arm 3a so that the molten metal lump M is immersed in the molten metal K and melted by the processing hand 5. A signal is transmitted to the manipulator 3. Further, when the image processing apparatus 2 identifies the foreign matter P as the oxide L, the arm 3a is driven so that the oxide L is removed from the liquid surface Ka of the molten metal K or the wall surface Ra of the furnace R by the processing hand 5. A control signal to be transmitted is transmitted to the manipulator 3.

  FIG. 2 is a partially enlarged view showing the processing hand of the manipulator shown in FIG. 1 in an enlarged manner, and FIG. 2A is an example of the processing hand for immersing the molten metal lump in the molten metal. FIG. 2B is a diagram showing an example of a processing hand for removing the oxide from the liquid surface of the molten metal or the wall surface of the furnace.

  A processing hand 5a (5) shown in FIG. 2 (a) includes a rod-shaped member 50 attached to the tip 3b of the arm 3a of the manipulator 3, and an annular shape whose outer shape is attached to the tip of the rod-like member 50. A member 51, a substantially flat plate-like member 52 attached to the distal end side of the annular member 51, and a frame 53 that holds the position of the plate-like member 52 with respect to the annular member 51 are provided.

  Further, the processing hand 5b (5) shown in FIG. 2 (b) has a rod-shaped member 60 attached to the distal end portion 3b of the arm 3a of the manipulator 3 and an outer shape attached to the distal end side of the rod-shaped member 60 in a substantially rectangular shape. The plate-like member 61, the substantially plate-like plate-like member 62 attached in a substantially vertical direction with respect to the plate-like member 61, and the respective sides for holding the position of the plate-like member 62 with respect to the plate-like member 61. And a side plate 63 that connects the parts.

  The manipulator 3 is prepared in advance with the processing hand 5a shown in FIG. 2A and the processing hand 5b shown in FIG. 2B, and the molten metal mass M is transferred from the controller 4 to the inside of the molten metal K as described above. When a control signal for driving the arm 3a so as to be immersed in and melted is transmitted, the processing hand 5a shown in FIG. 2A is attached to the tip 3b of the arm 3a. Then, the plate-like member 52 of the processing hand 5a is moved in the direction of immersion in the molten metal K (in the direction of arrow X in the figure), and the metal detected at the liquid level Ka of the molten metal K and the wall surface Ra of the furnace R The molten metal mass M is pressed toward the inside of the molten metal K by the front surface 52a of the plate-like member 52 of the processing hand 5a to be immersed in the molten metal K. Here, when the plate-like member 52 is immersed in the molten metal K and the molten metal lump M is pressed toward the inside of the molten metal K by the front surface 52a of the plate-like member 52, or the plate of the processing hand 5a. When the plate-like member 52 is moved to the opposite side to the direction in which the metal-like member 52 is immersed in the molten metal K and the plate-like member 52 is taken out from the inside of the molten metal K, it is opposite to the front surface 52a of the plate-like member 52. The molten metal K that has entered the side surface 52b is returned to the molten metal K in the furnace R again, for example, through the hollow portion of the annular member 51 to which the plate-like member 52 is attached.

  Further, when a drive signal for removing the oxide L from the liquid surface Ka of the molten metal K or the wall surface Ra of the furnace R is transmitted from the controller 4, the manipulator 3 moves the processing hand 5b shown in FIG. It attaches to the front-end | tip part 3b of the arm 3a. Then, the rake face 64 formed by the surfaces of the plate-like members 61 and 62 of the processing hand 5b and the surface of the side plate 63 is immersed in the molten metal K, and then taken out from the molten metal K to the outside (see FIG. The oxide L detected at the liquid level Ka of the molten metal K is scooped at the rake face 64 of the processing hand 5b, or the oxide L detected at the wall surface Ra of the furnace R Is scraped off with the plate-like member 62 of the processing hand 5b. The oxide L scraped off by the rake face 64 of the processing hand 5b or scraped off by the plate-like member 62 or the like is discarded in a disposal container or the like provided outside the furnace R.

  By adopting such a configuration, the molten metal lump M and the oxide L floating on the liquid surface Ka of the molten metal K stored in the furnace R or adhering to the wall surface Ra of the furnace R are refined. Can be identified. Further, by moving the processing hand 5 attached to the tip 3b of the arm 3a of the manipulator 3 according to the identification result relative to the liquid level Ka of the molten metal K and the wall surface Ra of the furnace R, the above-mentioned The molten metal lump M to be melted in the molten metal K, or the oxide L can be removed from the molten metal K, and the quality of the casting manufactured by filling the molten metal K in a mold or the like is improved. Can do. Also, the molten metal mass M adhering to the wall surface Ra of the furnace R is melted into the molten metal K, or the oxide L adhering to the wall surface Ra of the furnace R is removed from the wall surface Ra, thereby the furnace R It is also possible to effectively reduce the number of man-hours for the maintenance work of the wall surface Ra.

  In the above-described embodiment, the molten metal lump M is immersed in the molten metal K and melted, and the oxide L is removed from the liquid surface Ka of the molten metal K or the wall surface Ra of the furnace R. Although the form using the different process hand 5 was demonstrated, for example, using the process hand 5 shown in FIG.2 (b), the metal molten lump M detected by the liquid level Ka of the molten metal K and the wall surface Ra of the furnace R is metal It may be pressed toward the inside of the molten metal K and immersed in the molten metal K.

[Identification Method Embodiment]
Next, an embodiment of the identification method of the present invention will be described with reference to FIGS.

  FIG. 3 is a flowchart illustrating an embodiment of the identification method of the present invention. FIG. 4 is a diagram illustrating an example of an image captured by the camera, and FIG. 5 is a diagram illustrating an example of a master image. FIG. 6A is a diagram showing the result of binarizing an image captured by the camera, and FIG. 6B is a diagram showing the result of binarizing the master image. FIG. 8 is a diagram showing a difference between FIG. 6A and FIG. 6B, and FIG. 8 is a diagram showing a result of restoring a portion in the captured image corresponding to the foreign substance shown in FIG.

  As shown in FIG. 3, first, in S <b> 11, the liquid level Ka of the molten metal K and the wall surface Ra of the furnace R stored in the furnace R by the camera (imaging unit) 1 arranged vertically above the furnace R are displayed. An image is taken (see FIG. 4).

  Next, in S12, the image captured by the image processing apparatus (identification unit) 2 is compared with the master image, and it is determined whether there is a difference between the two images. Here, the master image is, for example, an image stored in advance in the image processing apparatus 2, and a molten metal such as a molten metal mass M or oxide L on the liquid surface Ka of the molten metal K or the wall surface Ra of the furnace R. It is an image captured in a state where no foreign matter P different from K or the like is formed (see FIG. 5).

  If it is determined in S12 that there is a difference between the captured image of the camera 1 and the master image, a portion having a difference in the captured image is detected as a foreign matter P different from the molten metal K or the like in S13.

  Specifically, the image processing device 2 binarizes the captured image of the camera 1 and the master image with predetermined components (see FIGS. 6A and 6B), and compares the image values in the entire area of the captured image. A portion where the difference between the two image values is larger than a predetermined value is detected as a foreign matter P (see FIG. 7). Note that the criterion for determining whether or not there is a difference between the captured image of the camera 1 and the master image can be appropriately set according to the forming material of the molten metal K and the furnace R, the ambient temperature, and the like. it can.

  On the other hand, if it is determined in S12 that there is no difference between the captured image of the camera 1 and the master image, it differs from the molten metal K such as the molten metal lump M or oxide L in the captured image in S14. It is specified that there is no foreign matter P.

  Specifically, the image processing device 2 binarizes the captured image of the camera 1 and the master image with a predetermined component, and if the difference between the image values in all areas of the captured image is less than or equal to a predetermined value, It is specified that the foreign matter P does not exist.

  In S15, it is determined whether or not the glossiness of the foreign matter P detected in S13 is higher than a predetermined glossiness. If the glossiness of the foreign matter P is higher than the predetermined glossiness, the foreign matter is determined in S16. P is identified as a molten metal mass M. On the other hand, when the glossiness of the foreign matter P is not more than the predetermined glossiness, the foreign matter P is identified as the oxide L in S18.

  Specifically, the location in the captured image corresponding to the foreign matter P detected in S13 is restored by the image processing apparatus 2 (see FIG. 8), and the glossiness (reflected light intensity, luminance, etc.) of the location is also referred to. ) And the glossiness is higher than the predetermined glossiness, the portion is identified as the molten metal lump M. On the other hand, when the calculated glossiness is equal to or lower than the predetermined glossiness, the portion is identified as the oxide L. In addition, as an identification element for identifying whether the foreign matter P detected in S13 is the oxide L or the molten metal lump M, the color or shape of the foreign matter P can also be applied.

  When the foreign matter P is identified as the molten metal lump M in S16, in S17, the arm 3a of the manipulator 3 is driven, and the molten metal lump M is immersed in the molten metal K by the processing hand 5 attached to the tip 3b. Melt. On the other hand, when the foreign matter P is identified as the oxide L in S18, in S19, the arm 3a of the manipulator 3 is driven, and the oxide L is liquid level Ka of the molten metal K by the processing hand 5 attached to the tip 3b. Or removed from the wall surface Ra of the furnace R.

  Then, the molten metal lump M is immersed in the molten metal K in S17, or the oxide L is removed from the liquid surface Ka of the molten metal K or the wall surface Ra of the furnace R in S19. The liquid level Ka of the molten metal K and the wall surface Ra of the furnace R stored inside are imaged (S11), the image processing apparatus 2 detects the foreign matter P in the captured image (S13), and the detected foreign matter P is detected. It distinguishes into the molten metal lump M and the oxide L (S16, S18).

  By repeating such a process, the molten metal mass M and the oxide L formed on the liquid surface Ka of the molten metal K and the wall surface Ra of the furnace R with time can be reliably detected and identified. The yield rate of a cast product manufactured by filling the molten metal into a mold or the like can be increased, and the quality of the cast product can be improved by reliably suppressing the mixing of oxides into the cast product. Further, the molten metal lump M formed on the wall surface Ra of the furnace R is melted into the molten metal K, and the oxide L formed on the wall surface Ra of the furnace R is removed from the wall surface Ra, whereby the wall surface of the furnace R is obtained. It is also possible to reduce the man-hours for Ra maintenance work.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 ... Camera (imaging part), 2 ... Image processing apparatus (identification part), 3 ... Manipulator (processing part), 4 ... Controller (control part) 5, 5a, 5b ... Processing hand, 10 ... Identification apparatus, K ... Molten metal, Ka ... level of molten metal, L ... oxide (metal melt oxide), M ... molten metal lump, P ... foreign material, R ... furnace, Ra ... wall surface of furnace

Claims (11)

An identification device for distinguishing between a molten metal stored in a furnace and a foreign object floating on the surface of the molten metal or adhering to a wall surface of the furnace, wherein the foreign object is a metal solidified by the molten metal In an identification device comprising a molten metal lump or a molten metal oxide obtained by solidifying and oxidizing the molten metal,
An imaging unit for imaging from the liquid level of the molten metal to the wall surface of the furnace;
A foreign object floating on the liquid surface of the molten metal or adhering to the wall surface of the furnace is detected from an image captured by the imaging unit, and the detected foreign object is at least one of glossiness, color, and shape. An identification device for identifying a molten metal stored in a furnace and a foreign substance, comprising: an identification unit that identifies a molten metal lump and a molten metal oxide based on an identification element composed of one of them. The identification device includes a processing unit that is relatively movable with respect to a liquid level of the molten metal and a wall surface of the furnace, and a control unit that controls movement of the processing unit,
The said control part moves the said process part, when the said identification part recognizes the said foreign material as a molten metal lump, the said molten metal lump is immersed in a molten metal, and is made to melt. The identification device described in 1. The identification device includes a processing unit that is relatively movable with respect to a liquid level of the molten metal and a wall surface of the furnace, and a control unit that controls movement of the processing unit,
The control unit moves the processing unit and removes the molten metal oxide from the liquid surface of the molten metal or the wall surface of the furnace when the identification unit identifies the foreign matter as molten metal oxide. The identification device according to claim 1. The identification device includes a processing unit that is relatively movable with respect to a liquid level of the molten metal and a wall surface of the furnace, and a control unit that controls movement of the processing unit,
When the identification unit identifies the foreign object as a molten metal lump, the control unit moves the processing unit to immerse the molten metal lump in the molten metal and melts the foreign object. 2. The identification device according to claim 1, wherein, when identified as a molten metal oxide, the processing unit is moved to remove the molten metal oxide from a liquid level of the molten metal or a wall surface of the furnace. .   The said identification part detects the said foreign material by comparing the image imaged by the said imaging part with the master image of the liquid level of the said molten metal previously stored, and the wall surface of the said furnace. 5. The identification device according to any one of items 1 to 4. A method of identifying a molten metal stored in a furnace and a foreign object floating on the surface of the molten metal or adhering to the wall of the furnace,
A first step of imaging from the surface of the molten metal to the wall of the furnace;
A second step of detecting foreign matter floating on the liquid surface of the molten metal or adhering to the wall surface of the furnace from the imaged image;
The foreign matter comprises a molten metal block obtained by solidifying the molten metal or a molten metal oxide obtained by solidifying and oxidizing the molten metal. And a third step of identifying the molten metal lump and the molten metal oxide based on the identification element.   The identification method according to claim 6, wherein when the foreign matter is a molten metal lump, the molten metal lump is immersed in the molten metal and melted.   The identification method according to claim 6 or 7, wherein when the foreign matter is a molten metal oxide, the molten metal oxide is removed from a liquid level of the molten metal or a wall surface of the furnace.   9. The foreign object is detected in the second step by comparing a captured image with a master image of the liquid surface of the molten metal stored in advance and a wall surface of the furnace. Identification method described in 1.   After the molten metal mass is immersed in the molten metal and melted, the molten metal is imaged from the liquid surface to the wall surface of the furnace, the foreign matter is detected from the captured image, and the detected foreign matter is detected. The identification method according to claim 7, wherein a molten metal lump and a molten metal oxide are identified.   After removing the molten metal oxide from the liquid surface of the molten metal or the wall surface of the furnace, image from the liquid surface of the molten metal to the wall surface of the furnace, detect the foreign matter from the captured image, The identification method according to claim 8, wherein the detected foreign matter is identified as a molten metal lump and a molten metal oxide.

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