CN112710238A - Continuous casting billet length photographing and sizing device and method - Google Patents
Continuous casting billet length photographing and sizing device and method Download PDFInfo
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- CN112710238A CN112710238A CN201911017768.9A CN201911017768A CN112710238A CN 112710238 A CN112710238 A CN 112710238A CN 201911017768 A CN201911017768 A CN 201911017768A CN 112710238 A CN112710238 A CN 112710238A
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 63
- 238000004513 sizing Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000003384 imaging method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 22
- 238000005520 cutting process Methods 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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Abstract
The invention provides a continuous casting billet length camera shooting sizing device and method, which comprise an image acquisition device, an image processing device, a scaling rule and a continuous casting billet to be tested, wherein the image acquisition device comprises a camera shooting device, an image processing device and a camera shooting device, wherein the camera shooting device comprises a camera shooting device, a scaling rule and a continuous casting billet: the image acquisition device acquires image information of the calibration scale and the continuous casting billet to be detected and transmits the image information to the image processing device; and the image processing device receives the image information, digitally processes the image information, and calculates to obtain the length of the continuous casting billet to be measured. The invention adopts a non-contact measurement mode, and compared with a contact measurement mode, the measurement error range is greatly reduced; compared with the traditional fixed-length cutting mode, the method avoids the error problem caused by friction and slippage generated by an encoder and a collision ball; compared with the existing non-contact measurement mode, the invention has simpler structure and simpler operation; the 1m calibration scale is arranged, and errors caused by factors such as camera position movement and the like are avoided through the positioning of the 1m calibration scale.
Description
Technical Field
The invention relates to the field of image processing, in particular to a continuous casting billet length photographing and sizing device and method.
Background
The continuous casting billet sizing and cutting technology is optimized through development for many years, and the sizing technology of the continuous casting billet increasingly matures. The existing methods for measuring the length of a continuous casting billet are mainly divided into two categories: contact measurement and non-contact measurement. The contact measurement mainly uses a fixed-length collision ball and an encoder to measure length, and the non-contact measurement mainly uses an infrared imager fixed length and a laser range finder.
The principle of fixed-length ball collision is that when a continuous casting billet runs to a ball collision position, the ball collision and the continuous casting billet are instantaneously contacted to form an electrical loop so as to enable a relay to suck and send cutting information, and although the system structure is relatively simple and the investment cost is relatively low, the ball collision is easy to wear and send error signals, and the like, the fixed-length failure rate is high; the principle of length measurement by the encoder is that the pulse encoder is connected with the withdrawal and straightening machine, and the length of the continuous casting billet is measured and calculated according to the rotation of the withdrawal and straightening machine. The system is easily influenced by the ambient temperature during measurement, and the roller and the continuous casting billet are easy to slip, so that unacceptable accumulated errors can be generated after a long time. Infrared thermal imaging belongs to a passive non-contact type measuring mode, the head position of a plate blank is identified through an infrared image technology, and then the calculated length of the plate blank is compared with a set value to send a cutting instruction of a continuous casting blank; the laser distance measuring instrument adopts the phase comparison principle to realize measurement, and the length of the slab is calculated by sending and receiving laser beams with different frequencies and the received signals through a microprocessor. The method adopts a laser measurement mode to measure the length of the continuous casting billet, and has the problems of deviation caused by deviation of a roller way and false signal generation caused by diffuse reflection generated on the surface of the plate billet during measurement.
Non-contact sizing is a common method for measuring the length of a continuous casting billet at present. The advantage of using non-contact measurement is that not only the strength of manual sizing can be reduced, but also the error of traditional sizing can be reduced. Therefore, the defective rate in the subsequent steel rolling process is reduced, the yield is improved, the waste of continuous casting billets is reduced, and the economic benefit is improved.
The patent with the application number of 200420079145.7 discloses a continuous casting fixed-length hot metal infrared detector and a slab fixed-length hot metal infrared detection method, which mainly comprise an infrared probe, a heat detection element, a transmission optical cable and the like, and the working principle is that a slab running to a cutting position is received by the heat detection element after being gathered due to higher temperature, the fixed-length is presumed to be in place based on the intensity degree of the received light, an electric signal is sent to a PLC control unit, and a cutting machine is controlled by the PLC to execute the cutting process.
Compared with the traditional fixed-length cutting method, the infrared detection method based on the infrared probe has relatively high success rate and precision, but has relatively high requirements on the specification of elements and the installation position of a thermal detection element, and considering that the field temperature is high, the optical cable is generally an armored optical cable, the installation of the thermal detection element is far away from a high-temperature place, and in addition, the long-distance measurement and monitoring cannot be realized.
The patent with application number 201620089316.7 discloses a billet detecting and sizing method taking a laser range finder as a core, which mainly comprises a laser range finding detection device, a large frame, a cutting trolley, wherein the cutting trolley is arranged on the large frame, and the laser range finder is arranged at the side position below the large frame. The laser range finder gives PLC's analog input structure with measured data through 4 ~ 20 MA's electric current transmission, then PLC calculates the distance between laser range finder and the slab terminal surface, again according to the relative position calculation between predetermined scale length and laser range finder and the cutting machine the distance that the cutting machine will move to realize the high-efficient accurate continuous casting billet scale cutting.
The scale cutting device based on the laser range finder can adapt to complex factory environment, has higher reliability and stability, and the shortcoming is that the laser range finder's price is more expensive, receives slab surface caking easily to and the influence of fog and vibrations.
The invention patent with application number CN201610439433.6 discloses a method for re-measuring the length of a plate blank on line, which comprises the following concrete steps: marking two different points on the roller way, establishing a corresponding relation between the pixel position and the actual position of the roller way, then shooting and identifying the head and the tail of the plate blank through a No. 1 camera and a No. 2 camera, determining the pixel position of the head and the tail of the plate blank on the next step, deducing the actual position of the head and the tail of the plate blank in the roller way according to the relation between the pixel and the actual position of the whole roller way, and finally calculating the length of the plate blank according to the actual position. The system has the defects that a large amount of heat radiation can be generated in the production process of the casting blank, the camera is easy to age, and a protection cover is added to the camera in a common method.
Compared with the method, the invention can finish the fixed-length cutting operation of the plate blank by using one camera, thereby reducing the engineering cost. Moreover, the method for calculating the length of the slab is simpler, the actual coordinate position of the calibration scale in the roller way does not need to be considered, and the length of the slab can be calculated only by knowing the pixel scale of the calibration scale in the image pickup range. In addition, because the field is severe and the dust is large, the length of the plate blank calculated by adopting the calibration points is easily interfered by the external environment, and the sizing of the plate blank is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a continuous casting billet length photographing and sizing device and method.
The invention provides a continuous casting billet length camera shooting sizing device, which comprises an image acquisition device, an image processing device, a sizing ruler and a continuous casting billet to be detected, wherein:
the image acquisition device acquires image information of the calibration scale and the continuous casting billet to be detected and transmits the image information to the image processing device;
and the image processing device receives the image information, digitally processes the image information, and calculates to obtain the length of the continuous casting billet to be measured.
Preferably, the image acquisition device comprises a camera.
Preferably, still include the roll table, the roll table is used for carrying the continuous casting billet that awaits measuring, image acquisition device set up in the top of roll table.
Preferably, the calibration ruler and the continuous casting billet to be detected are arranged in parallel.
Preferably, the calibration ruler is fixed below the image acquisition device or arranged on the continuous casting billet to be detected.
Preferably, the image processing device comprises a single chip microcomputer.
Preferably, the image processing device digitizes the image information to obtain a pixel representation of the image.
Preferably, the length of the calibration ruler is 1 m.
The continuous casting billet length photographing and sizing method based on the continuous casting billet length photographing and sizing device provided by the invention comprises the following steps of:
the collection step comprises: the image acquisition device acquires image information of the calibration scale and the continuous casting billet to be detected and transmits the image information to the image processing device;
the processing steps are as follows: and the image processing device receives the image information, carries out digital processing on the image information to obtain a pixel representation form of the image, and calculates to obtain the length of the continuous casting billet to be measured.
Preferably, the processing step comprises:
the pixel size of the processed calibration scale is X0, and the pixel size of the continuous casting billet to be detected is X; the actual length of the calibration scale is L0, then: the actual length L of the slab is X L0/X0.
Compared with the prior art, the invention has the following beneficial effects:
the utility model provides a scale system based on camera has reached the measurement to continuous casting billet length through adopting the camera to carry out image acquisition and tracking and applied intelligent image processing to the continuous casting billet.
1. The invention adopts a non-contact measurement mode, and compared with a contact measurement mode, the measurement error range is greatly reduced;
2. compared with the traditional fixed-length cutting mode, the method avoids the error problem caused by friction and slippage generated by an encoder and a collision ball;
3. compared with the existing non-contact measurement mode, the invention has simpler structure and simpler operation;
4. the invention is provided with the 1m calibration scale, and the error caused by factors such as camera position movement and the like is avoided through the positioning of the 1m calibration scale.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a drawing of a continuous casting billet length camera shooting sizing device.
The figures show that:
Roller table 4
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, the device for photographing and sizing the length of the continuous casting billet provided by the invention comprises: a camera 1, a scale 2 and an image processing device. The camera 1 is used as a sensor for collecting images of the continuous casting billet 3 and the unit scaling rule 2, the collected images are subjected to digital processing through an image processing device to obtain a dot matrix expression form of the images, each point in the dot matrix represents one pixel, each pixel represents one spatial position of a continuous casting scaling site, the scaling rule 2 is used for providing reference for length measurement of the continuous casting billet 3, and the actual length of the slab is estimated through pixel information of the scaling rule 2 and pixel information of the continuous casting billet 3.
The camera 1 and the calibration scale 2 are installed at fixed positions of a measurement site, the camera 1 collects image information of the running continuous casting billet 3 and the calibration scale 2 at a certain frame number, and the collected images are subjected to digital processing to obtain a pixel representation form of the images. Further, the pixel size of the continuous casting slab 3 in the visual field of the camera 1 is X0 and the pixel size of the unit scale 2 in the computer screen is X0. This gives: the actual length L of the strand 3 is X/X0.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The utility model provides a continuous casting billet length scale device of making a video recording which characterized in that, includes image acquisition device, image processing apparatus, calibration scale and the continuous casting billet that awaits measuring, wherein:
the image acquisition device acquires image information of the calibration scale and the continuous casting billet to be detected and transmits the image information to the image processing device;
and the image processing device receives the image information, digitally processes the image information, and calculates to obtain the length of the continuous casting billet to be measured.
2. The device for photographing and sizing the length of the continuous casting billet according to claim 1, wherein the image acquisition device comprises a camera.
3. The continuous casting billet length camera shooting sizing device according to claim 1, characterized by further comprising a roller way, wherein the roller way is used for conveying a continuous casting billet to be detected, and the image acquisition device is arranged above the roller way.
4. The continuous casting billet length shooting and sizing device according to claim 1, wherein the calibration ruler is arranged in parallel with the continuous casting billet to be measured.
5. The continuous casting billet length shooting and sizing device according to claim 1, wherein the scaling ruler is fixed below the image acquisition device or arranged on the continuous casting billet to be measured.
6. The continuous casting billet length shooting and sizing device according to claim 1, characterized in that the image processing device comprises a single chip microcomputer.
7. The slab length imaging and sizing device according to claim 1, wherein the image processing device digitizes the image information to obtain a pixel representation of an image.
8. The device for photographing and sizing the length of the continuous casting billet according to claim 1, wherein the length of the calibration scale is 1 m.
9. A continuous casting billet length photographing and sizing method based on the continuous casting billet length photographing and sizing device of any one of claims 1 to 8 is characterized by comprising the following steps:
the collection step comprises: the image acquisition device acquires image information of the calibration scale and the continuous casting billet to be detected and transmits the image information to the image processing device;
the processing steps are as follows: and the image processing device receives the image information, carries out digital processing on the image information to obtain a pixel representation form of the image, and calculates to obtain the length of the continuous casting billet to be measured.
10. The slab length photographing and sizing method according to claim 9, wherein the processing step comprises:
the pixel size of the processed calibration scale is X0, and the pixel size of the continuous casting billet to be detected is X; the actual length of the calibration scale is L0, then: the actual length L of the slab is X L0/X0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911017768.9A CN112710238A (en) | 2019-10-24 | 2019-10-24 | Continuous casting billet length photographing and sizing device and method |
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| CN201911017768.9A CN112710238A (en) | 2019-10-24 | 2019-10-24 | Continuous casting billet length photographing and sizing device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113780646A (en) * | 2021-09-01 | 2021-12-10 | 中冶南方工程技术有限公司 | Intelligent cutting and sizing method for continuous casting billet |
| CN117245066A (en) * | 2023-11-16 | 2023-12-19 | 江苏永钢集团有限公司 | Alignment device of continuous casting machine conveying roller way |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06313705A (en) * | 1993-04-28 | 1994-11-08 | Nippon Steel Corp | Apparatus and method for detecting shape of billet |
| KR20020023731A (en) * | 2001-12-13 | 2002-03-29 | 이태석 | cutting casting plate maching controller of constant casting process |
| CN103008775A (en) * | 2012-12-03 | 2013-04-03 | 上海交通大学 | Multi-process billet cut-to-length control method |
| CN104772443A (en) * | 2015-04-09 | 2015-07-15 | 田志恒 | Fixed-length measurement system and method for continuous casting billet |
| CN108240793A (en) * | 2018-01-26 | 2018-07-03 | 广东美的智能机器人有限公司 | Dimension of object measuring method, device and system |
| CN208495733U (en) * | 2018-07-05 | 2019-02-15 | 湖北新冶钢特种钢管有限公司 | A kind of scale system with position detecting function |
-
2019
- 2019-10-24 CN CN201911017768.9A patent/CN112710238A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06313705A (en) * | 1993-04-28 | 1994-11-08 | Nippon Steel Corp | Apparatus and method for detecting shape of billet |
| KR20020023731A (en) * | 2001-12-13 | 2002-03-29 | 이태석 | cutting casting plate maching controller of constant casting process |
| CN103008775A (en) * | 2012-12-03 | 2013-04-03 | 上海交通大学 | Multi-process billet cut-to-length control method |
| CN104772443A (en) * | 2015-04-09 | 2015-07-15 | 田志恒 | Fixed-length measurement system and method for continuous casting billet |
| CN108240793A (en) * | 2018-01-26 | 2018-07-03 | 广东美的智能机器人有限公司 | Dimension of object measuring method, device and system |
| CN208495733U (en) * | 2018-07-05 | 2019-02-15 | 湖北新冶钢特种钢管有限公司 | A kind of scale system with position detecting function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113780646A (en) * | 2021-09-01 | 2021-12-10 | 中冶南方工程技术有限公司 | Intelligent cutting and sizing method for continuous casting billet |
| CN117245066A (en) * | 2023-11-16 | 2023-12-19 | 江苏永钢集团有限公司 | Alignment device of continuous casting machine conveying roller way |
| CN117245066B (en) * | 2023-11-16 | 2024-01-23 | 江苏永钢集团有限公司 | Alignment device of continuous casting machine conveying roller way |
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Application publication date: 20210427 |