CN112122366A - Hot roll surface online detection system and detection method thereof - Google Patents
Hot roll surface online detection system and detection method thereof Download PDFInfo
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- CN112122366A CN112122366A CN201910552388.9A CN201910552388A CN112122366A CN 112122366 A CN112122366 A CN 112122366A CN 201910552388 A CN201910552388 A CN 201910552388A CN 112122366 A CN112122366 A CN 112122366A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/12—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll camber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
- B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
Abstract
The invention discloses an online detection system and a measurement method for a hot roll surface, which comprises a visual imaging unit, a hot roll surface detection unit and a measurement unit, wherein the visual imaging unit is used for continuously shooting the hot roll surface; the image acquisition unit is used for acquiring the image information shot by the visual imaging unit and then transmitting the image information; the image processing unit is used for receiving the image information, processing the image information, classifying hot rolling surface defects in the image information and judging the working state; and the image storage and display unit is used for displaying the image information of the hot roll surface defects and storing the information. The method can effectively find the deterioration trend of the oxide film on the surface of the roller in time, and avoid the quality loss caused by the press-in defect of the oxide scale on the surface of the strip steel in batches.
Description
Technical Field
The invention relates to a hot roll surface detection technology, in particular to an online hot roll surface detection system and a detection method thereof.
Background
The roll is an important tool in the steel rolling industry, is the most main consumption part of the steel rolling equipment, and the steel rolling consumption is rapidly increased along with the increase of the steel production quantity, so that the detection of steel rolling by various large steel enterprises is also increasingly emphasized. The online detection of the state of the oxide film on the surface of the roller is a powerful support function for researching the forming and stripping mechanism of the oxide film on the surface of the roller and matching the process improvement of field production, and in addition, the deterioration trend of the oxide film on the surface of the roller can be timely and effectively found from the process blocking aspect, so that the quality loss caused by the pressing-in defect of the oxide scale on the surface of the strip steel in batches is avoided.
Besides the iron scale defects, the surface of the roller can be provided with single defects such as indentation, steel biting collision marks, fire cracks, pressure cracks, roller surface scratch marks, material accumulation, holes, slip marks, strips, cracks with material problems, uneven oxide films and the like. At present, various domestic iron and steel enterprises start to detect the surface of a roll, generally adopt the techniques of ultrasonic wave, eddy current, visual detection and the like, and can detect cracks and the like of the roll by the methods, but most of the methods realize the detection of the surface of a cold roll and do not relate to the online detection of the surface of a hot roll.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the hot roll surface online detection system and the detection method thereof, which can effectively find the deterioration trend of the oxide film on the surface of the roll in time and avoid the quality loss caused by the press-in defect of the oxide scale on the surface of the batch of strip steel.
In order to achieve the purpose, the invention adopts the following technical scheme:
on the one hand, a hot roll face on-line measuring system which characterized in that: comprises that
The visual imaging unit is used for continuously shooting the hot roll surface;
the image acquisition unit is used for acquiring the image information shot by the visual imaging unit and then transmitting the image information;
the image processing unit is used for receiving the image information, processing the image information, classifying hot rolling surface defects in the image information and judging the working state;
and the image storage and display unit is used for displaying the image information of the hot roll surface defects and storing the information.
The device also comprises a detection protection mechanism used for installing the visual imaging unit.
The visual imaging unit comprises a plurality of cameras and a light source, the cameras are all arranged along the axial direction of the hot roll, and the light source is axially parallel to the surface of the hot roll.
The circle tangent angle between the light source and the hot roll surface is 10 degrees +/-2 degrees.
The image acquisition unit comprises an image acquisition card and an Ethernet card, the image acquisition card is used for receiving the image information of the image acquisition unit, and the Ethernet card is used for transmitting the image information to the image processing unit.
The image processing unit is an image processing computer.
The image processing computer comprises an OD1 real-time processing module and an OD2 timely processing module.
The image storage and display unit comprises a display and a data server, wherein the display is used for displaying image information of the hot roll surface defects, and the data server is used for storing the information.
On the other hand, the hot roll surface online detection method comprises the following steps:
in the strip steel rolling gap, an L2-level computer system sends a rolling end signal to a hot roll surface online detection system to trigger a plurality of cameras in a visual imaging unit to continuously shoot the hot roll surface in a full range, an image acquisition unit sends acquired image information to an image processing unit, and after image processing is finished, the image processing unit sends processed defect image data to an image storage and display unit, displays a defect image in a display and stores the data to a server.
The image processing unit is a double-layer processing structure combining an OD1 real-time processing module and an OD2 timely processing module, the OD1 real-time processing module receives image information, judges the image information, stores the image information containing suspected defects into the OD2 timely processing module for caching, and otherwise deletes the image information;
the OD2 timely processing module further performs defect segmentation, image storage, special extraction and defect classification on the image information containing the suspected defects in the cache.
In the technical scheme, the hot roll surface on-line detection system and the detection method thereof provided by the invention are installed in a production field, and two detection devices are designed in total and installed between frames to respectively realize the detection of an upper working roll and a lower working roll in consideration of severe field environment and small installation space. According to the detection requirement, a plurality of table-board array cameras are arranged on each detection device, and the full-width detection of the whole working roller is achieved. And detecting the roller on the production line in real time. In the strip steel rolling gap, the roller is kept in a running state, the detection device can clearly image the roller surface state, and the images are processed and classified to obtain the defect type and size. According to the defect condition, the roller is polished on line, so that the generation of periodic defects of the strip steel caused by the surface quality problem of the roller is effectively reduced. By using the invention, the dissimilarity of product quality can be greatly reduced, and huge social and economic benefits are brought.
Drawings
FIG. 1 is a schematic diagram of the framework of the on-line detection system of the present invention;
FIG. 2 is a state diagram of the use of the on-line detection system of the present invention;
FIG. 3 is a flowchart of the operation of the image processing unit in the on-line inspection system of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1 to fig. 3, an online detecting system for a hot roll surface provided by the present invention includes:
the visual imaging unit 1 is used for continuously shooting the hot roll surface;
the image acquisition unit 2 is used for acquiring the image information shot by the visual imaging unit 1 and then transmitting the image information;
the image processing unit 3 is used for receiving the image information, processing the image information, classifying hot rolling surface defects in the image information and judging the working state;
and the image storage and display unit 4 is used for displaying the image information of the hot roll surface defects and storing the information.
Preferably, a detection protection mechanism 5 is further included for mounting the visual imaging unit 1.
Preferably, the vision imaging unit 1 includes a plurality of cameras and a light source, the number of cameras is determined by the axial length of the hot roll surface and the resolution of the roll surface image, for example: when the size of a transverse imaging view for taking an image is 130mm, and the length of the roller along the axial direction is 1300mm, 1300/130-10 cameras are needed in total. Wherein, it constitutes the protective structure of camera and light source to detect protection machanism 5, and camera and light source are all installed in detecting protection machanism 5, and when the shooting demand, open the protective housing on detecting protection machanism 5, camera and light source just can begin work, and a plurality of cameras are all arranged along the hot roll axial, and the light source is parallel with the hot roll face axial to become about 10 with hot roll face circle tangential direction and install inside detecting protection machanism 5. In the hot roll surface on-line detection system, the components work cooperatively to achieve the purpose of realizing the quality detection of the hot roll surface.
The hot rolling working environment is very abominable, installation space is extremely limited, the operating temperature is very high again, the rolling temperature of working roll reaches 1000 ℃, the wire rod has facilities such as high pressure water again, in view of above reasons, in order to guarantee that the hot roll face on-line measuring system can normally work and detect, just need to detect protection machanism 5, it installs on the guide frame to detect protection machanism 5, visual imaging unit 1 includes camera and light source, all install in detecting protection machanism 5, can avoid the influence of environment, realize the clear formation of image to the roll face.
Preferably, the image acquisition unit 2 includes an image acquisition card and an ethernet card, the image acquisition card is configured to receive the image information of the image acquisition unit 1, and the ethernet card is configured to transmit the image information to the image processing unit 3.
Preferably, the image processing unit 3 is mainly composed of an image processing computer, and the image processing computer processes the hot roll surface image, distinguishes the defect image, and calculates the size and position of the defect.
Preferably, the image processing computer includes a double-layer processing architecture combining the OD1 real-time processing module 41 and the OD2 and time processing module 42, so as to ensure that image acquisition, edge detection and target detection are completed for each frame of image within the shortest processing time, and the image containing suspected defects is stored in the image cache, otherwise, the image is deleted, and then the suspected target images in the cache queue are further processed, including defect segmentation, image storage and the like.
Preferably, the image storage and display unit 5 includes a display for displaying image information of the hot roll surface defects and a data server for storing the information.
The invention also provides an online detection method of the hot roll surface, which comprises the following steps:
the detection objects are an upper working roll 6 and a lower working roll 7, a rolling end signal is sent to an online hot rolling roll surface detection system by an L2-level computer system in a strip rolling gap (when one piece of steel is rolled completely and the lower piece of steel is not yet arrived, a detection window period is provided), a plurality of cameras in a visual imaging unit 1 are triggered to continuously shoot the hot rolling roll surfaces (the upper working roll 6 and the lower working roll 7) in a full range, an image acquisition unit 2 sends acquired image information to an image processing unit 3, after the image processing is completed, the image processing unit 3 sends processed defect image data to an image storage and display unit 4, a defect image is displayed in a display, and the data is stored in a server.
Preferably, the image processing unit 1 is a dual-layer processing architecture combining the OD1 real-time processing module 41 and the OD2 and time processing module 42, and the OD1 real-time processing module 41 receives the image information, determines the image information, stores the image information containing suspected defects into the OD2 and time processing module 42 for buffering, and deletes the image information if the image information is not the same.
The OD2 and the timely processing module 42 further perform defect segmentation, image saving, special extraction and defect classification on the image information containing suspected defects in the cache.
In summary, the detection system and the detection method thereof of the invention image the hot roll surface by using the machine vision detection principle, and process and analyze the image to obtain the quality condition of the roll surface, and accurately detect the roll surface defects such as oxide film falling off. By finding the surface defects of the roller, the generation of periodic defects such as roller marks and the like can be stopped in time, and the quality of the strip is effectively ensured.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a hot roll face on-line measuring system which characterized in that: comprises that
The visual imaging unit is used for continuously shooting the hot roll surface;
the image acquisition unit is used for acquiring the image information shot by the visual imaging unit and then transmitting the image information;
the image processing unit is used for receiving the image information, processing the image information, classifying hot rolling surface defects in the image information and judging the working state;
and the image storage and display unit is used for displaying the image information of the hot roll surface defects and storing the information.
2. The hot-rolling surface on-line detection system of claim 1, wherein: the device also comprises a detection protection mechanism used for installing the visual imaging unit.
3. The hot-rolling surface on-line detection system as claimed in claim 2, wherein: the visual imaging unit comprises a plurality of cameras and a light source, the cameras are all arranged along the axial direction of the hot roll, and the light source is axially parallel to the surface of the hot roll.
4. The hot-rolling surface on-line detection system as claimed in claim 3, wherein: the circle tangent angle between the light source and the hot roll surface is 10 degrees +/-2 degrees.
5. The hot-rolling surface on-line detection system of claim 1, wherein: the image acquisition unit comprises an image acquisition card and an Ethernet card, the image acquisition card is used for receiving the image information of the image acquisition unit, and the Ethernet card is used for transmitting the image information to the image processing unit.
6. The hot-rolling surface on-line detection system of claim 1, wherein: the image processing unit is an image processing computer.
7. The online hot roll surface detection system as claimed in claim 6, wherein: the image processing computer comprises an OD1 real-time processing module and an OD2 timely processing module.
8. The hot-rolling surface on-line detection system of claim 1, wherein: the image storage and display unit comprises a display and a data server, wherein the display is used for displaying image information of the hot roll surface defects, and the data server is used for storing the information.
9. An on-line detection method of a hot rolling surface according to any one of claims 1 to 8, characterized in that:
in the strip steel rolling gap, an L2-level computer system sends a rolling end signal to a hot roll surface online detection system to trigger a plurality of cameras in a visual imaging unit to continuously shoot the hot roll surface in a full range, an image acquisition unit sends acquired image information to an image processing unit, and after image processing is finished, the image processing unit sends processed defect image data to an image storage and display unit, displays a defect image in a display and stores the data to a server.
10. The online detection method for the hot roll surface as claimed in claim 9, characterized in that: the image processing unit is a double-layer processing structure combining an OD1 real-time processing module and an OD2 timely processing module, the OD1 real-time processing module receives image information, judges the image information, stores the image information containing suspected defects into the OD2 timely processing module for caching, and otherwise deletes the image information;
the OD2 timely processing module further performs defect segmentation, image storage, special extraction and defect classification on the image information containing the suspected defects in the cache.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910552388.9A CN112122366A (en) | 2019-06-25 | 2019-06-25 | Hot roll surface online detection system and detection method thereof |
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| CN201910552388.9A CN112122366A (en) | 2019-06-25 | 2019-06-25 | Hot roll surface online detection system and detection method thereof |
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Cited By (4)
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| CN112808444A (en) * | 2021-01-04 | 2021-05-18 | 中冶长天国际工程有限责任公司 | Crusher and crushing roller abrasion detection device and detection method thereof |
| CN114522985A (en) * | 2022-04-13 | 2022-05-24 | 东莞海裕百特智能装备有限公司 | Roller rolling control method, system and computer readable storage medium |
| CN115069788A (en) * | 2021-03-15 | 2022-09-20 | 宝山钢铁股份有限公司 | Roller surface image shooting device and system and roller surface online detection system and method |
| CN115219512A (en) * | 2022-09-20 | 2022-10-21 | 常州树杰塑业有限公司 | PE film surface crystal point detection equipment |
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| CN115219512A (en) * | 2022-09-20 | 2022-10-21 | 常州树杰塑业有限公司 | PE film surface crystal point detection equipment |
| CN115219512B (en) * | 2022-09-20 | 2023-02-28 | 常州树杰塑业有限公司 | PE film surface crystal point detection equipment |
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Application publication date: 20201225 |