CN202548069U - On-line detection device for surface defects of high temperature continuous casting billet - Google Patents
On-line detection device for surface defects of high temperature continuous casting billet Download PDFInfo
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- CN202548069U CN202548069U CN201220059548XU CN201220059548U CN202548069U CN 202548069 U CN202548069 U CN 202548069U CN 201220059548X U CN201220059548X U CN 201220059548XU CN 201220059548 U CN201220059548 U CN 201220059548U CN 202548069 U CN202548069 U CN 202548069U
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Abstract
The utility model discloses an on-line detection device for surface defects of a high temperature continuous casting billet. The on-line detection device is characterized in that a high pressure argon descaling device is arranged on a front end of a detection device for removing scaly scale, casting powder and water films from the surface of a casting blank; a structured light laser emitter is used as a lighting source to project emitted laser beams to the surface of a high temperature casting billet, and an area array CCD (charge coupled device) camera is used as an image acquisition device to acquire laser rays reflected by the high temperature casting billet on line. The on-line detection device provided by the utility model can perform detection and classified quantitative evaluation on form and depth of the surface defects of the high temperature casting billet, which greatly improves efficiency of on-line detection device for surface defects of the high temperature continuous casting billet based on optical method, further effectively improves misjudgment ratio and recognition rate of fake defects, such as scale, the water film and casting powder, on the surface of the high temperature casting billet by the existing casting billet surface defect detection device, and improves precision of the on-line detection device for surface defects of the high temperature casting billet.
Description
Technical field
The utility model relates to a kind of high temperature continuous casting billet surface imperfection on-line measuring device, belongs to the field of continuous casting billet quality Detection & Controling in the Ferrous Metallurgy.
Background technology
Continuous casting billet because of technogenic influence, can crack, defective such as cut and pin hole in process of production unavoidably, and serious defective can exert an adverse impact to following one rolling mill practice.Cc billet surface quality is one of important indicator of slab quality, and casting billet surface defect property and degree are to judge one of important evidence that strand is whether qualified, therefore need carry out detection by quantitative to casting billet surface.
High temperature strand hot delivery and hot charging that development in recent years is got up and Direct Rolling Technology are systemic new technologies; This technology directly has influence on the integrated degree of steel making, continuous casting and hot rolling flow process, its economic benefit is embodied directly in and saves the energy, reduce production costs, shorten the production cycle and improve the quality of products on.Realize that high temperature strand hot delivery and hot charging and direct rolling support technology comprise many aspects; Except aspects such as the rolling technique of zero defect strand production technology, high temperature continuous casting billet production technology, process insulation and concurrent heating, the hot resume of adaptation different casting blank, the integrated production technology of steel-making-steel rolling, also has the online measuring technique of high temperature continuous casting billet surface imperfection in addition.Current, practical high temperature casting billet surface defect online detection method has three kinds of optical detection, ultrasonic Detection Method and detection method of eddy.Based on the optical detecting method of the high temperature casting billet surface defective of machine vision, owing to have noncontact, response is fast, and it is less influenced by high-temperature metal, has higher antijamming capability, and degree of accuracy is high, has received extensive studies rapidly in development in recent years.
CN101871895A discloses a kind of laser scanning imaging nondestructive inspection method for hot continuous casting blank surface defects, 1) generating laser laterally shines strand, obtains a laser wire harness; 2) by Array CCD sensor scan light shafts; 3) extract the depth of defect information of representative on the laser wire harness, thereby obtain the one-dimensional distance dot matrix that this lateral attitude depth of defect of strand is combined into; 4) one-dimensional distance dot matrix is mapped as gray level images with different gray levels; 5) the hot base gray level images with different gray levels of splicing, thus the overall intensity image obtained; 6) identification casting billet surface defective and reconstruct casting billet surface three-dimensional appearance figure.
When adopting the traditional optical method that high temperature casting billet surface defective is detected; Owing to disturbed by the information of materials such as casting billet surface iron scale, moisture film and covering slag; Adopt conventional Threshold Segmentation Algorithm; Can cause higher defective False Rate and accuracy rate, and accuracy of detection is not high and can not detect the degree of depth of surface imperfection.The problem that simultaneously existing high temperature casting billet surface on-line detection device of defects exists also comprises following two: 1) adopt single laser wire harness as light source, the scope along the throwing direction of unit interval interscan is little, causes treatment effeciency low; 2) false defects such as casting billet surface flakey iron scale, covering slag and moisture film have influence largely to the accuracy of detection of pick-up unit.
In view of this, be necessary to provide a kind of high temperature continuous casting billet surface imperfection on-line measuring device, to overcome above-mentioned defective.
Summary of the invention
The purpose of the utility model is: a kind of high temperature continuous casting billet surface imperfection on-line measuring device is provided; Through the utility model can to the form of high temperature casting billet surface defective and the degree of depth detects and carry out the classification quantitative assessment; Improve present efficient largely at warm casting billet surface defect line high detection device based on optical method; And improve False Rate and the discrimination of present casting billet surface defect detecting device effectively to the false defects such as iron scale, moisture film and covering slag of high temperature casting billet surface; Improve the precision of high temperature casting billet surface on-line detection device of defects, further save the energy, reduce production costs, shorten the production cycle and improve the quality of products.
The technical scheme of the utility model is: a kind of high temperature continuous casting billet surface imperfection on-line measuring device; Said pick-up unit mainly is made up of high pressure argon gas descaling device, structured light generating laser, Array CCD Camera, strand pick-up unit cabin; Structured light generating laser, Array CCD Camera are arranged in the strand pick-up unit cabin, it is characterized in that:
High pressure argon gas descaling device is arranged on the pick-up unit front end, is used to remove cataphracted iron scale, covering slag and the moisture film of casting billet surface;
Adopt the structured light generating laser as lighting source; Many green laser wire harness that send are projected the high temperature casting billet surface, are image collecting device with the Array CCD Camera, online acquisition high temperature casting billet surface laser light reflected light; Through image pick-up card IMAQ is got off; And carry out the A/D dress and change, be converted into digital picture, by computing machine digital picture is carried out filtering and noise reduction and handle; Casting billet surface image to collecting carries out advanced treating, thereby the form and the degree of depth of high temperature casting billet surface defective detected and form testing result;
Testing result is passed to database server through gigabit Ethernet, is connected through gigabit Ethernet between the installing terminal at the quality inspection station, terminal and database server, through the testing result of the real-time display defect in terminal.
Aforesaid high temperature continuous casting billet surface imperfection on-line measuring device is characterized in that, adopts many table tops battle array ccd video camera and Duo Tai structured light generating laser, and Array CCD Camera is placed on the high temperature strand transversely, apart from 2 meters of strands.
Aforesaid high temperature continuous casting billet surface imperfection on-line measuring device is characterized in that Array CCD Camera and structured light generating laser are installed in the high temperature protection cover, and adopts argon shield and water-cooled.
Aforesaid high temperature continuous casting billet surface imperfection on-line measuring device is characterized in that the high temperature strand forwards through the straightening roller, on the straightening roller pulse producer is installed, and gives the sweep frequency that computing machine is accurately controlled Array CCD Camera with it.
Aforesaid high temperature continuous casting billet surface imperfection on-line measuring device is characterized in that, it is the green glow of 532nm that laser adopts wavelength; Before the camera lens of Array CCD Camera, adding centre wavelength is the arrowband color filter of 532nm, and the ruddiness and the infrared light of the radiation of filtering casting billet surface are avoided the influence of bias light.
The beneficial effect of the utility model is: LASER Light Source adopts the structured light LASER Light Source, has enlarged the sweep limit of throwing direction in the unit interval, can improve the efficient of present high temperature casting billet surface on-line detection device of defects significantly; Install the iron scale that high pressure argon gas descaling device can be removed casting billet surface effectively additional at the pick-up unit front end; Covering slag and moisture film etc.; And improve False Rate and the discrimination of order casting billet surface defect detecting device effectively to the false defects such as iron scale, moisture film and covering slag of high temperature casting billet surface, improved the precision of high temperature casting billet surface on-line detection device of defects.
Description of drawings
Fig. 1 is the scheme of installation of the high temperature continuous casting billet surface imperfection on-line measuring device of the utility model embodiment.
Fig. 2 is the scheme of installation of the pick-up unit of the utility model embodiment.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following embodiment.Those skilled in the art can do various changes or modification to the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Label declaration in the accompanying drawing: 1-straightening roller; 2-high pressure argon gas de-scaling (iron scale) device; The 3-strand; 4-structured light generating laser; The 5-Array CCD Camera; 6-upper surface strand pick-up unit cabin; 7-fire cutter.
The scheme of installation of the pick-up unit that the utility model embodiment provides such as Fig. 1 and shown in Figure 2.
The platform number of LASER Light Source and ccd video camera is configured according to the situation of actual strand for the signal number among Fig. 1, below roller, should have lower surface strand pick-up unit, does not draw.
The high temperature continuous casting billet surface imperfection on-line measuring device that the utility model provides mainly is made up of high pressure argon gas descaling device 2, structured light generating laser 4, Array CCD Camera 5, upper surface strand pick-up unit cabin 6.
The utility model adopts structured light generating laser 4 as lighting source; Many green laser wire harness that send are projected high temperature strand 3 surfaces, are image collecting device with Array CCD Camera 5, online acquisition high temperature casting billet surface laser light reflected light; Through image pick-up card IMAQ is got off; And carry out A/D (simulating signal/digital signal) dress and change, be converted into digital picture, send by computing machine and handle; Digital picture is carried out processing such as filtering, denoising, some undesired signals in the removal of images.Through the Flame Image Process algorithm for pattern recognition casting billet surface image that collects is handled, thereby the form and the degree of depth that reach high temperature casting billet surface defective detect also classification quantitative assessment.
Carrying out before the high temperature casting billet surface defects detection high pressure argon gas descaling device 2 being set, promptly adopt the high pressure argon gas to remove the device of cataphracted iron scale, covering slag and the moisture film of casting billet surface.
The method of application of the high temperature casting billet surface on-line detection device of defects of the utility model is following:
1) adopt high pressure argon gas dephosphorization apparatus before strand carries out surface defects detection, to remove cataphracted iron scale, covering slag and the moisture film of casting billet surface;
2) mounting structure ray laser transmitter above the high temperature strand; By certain emission angle strand is laterally carried out laser radiation; Thereby transversely produce several narrow laser wire harness at strand; Gather the light of casting billet surface reflection by Array CCD Camera, the Array CCD Camera direction of scanning is vertical with the high temperature casting billet surface;
3) utilize the range of triangle principle to extract the depth of defect information of representative on the laser wire harness of reflected back; This depth information is with laterally different position information is corresponding; Thereby the one-dimensional distance dot matrix that the different lateral attitudes depth of defect that obtains projecting laser wire harness correspondence on the high temperature strand is combined into is mapped as other gray level image of different grey-scale with this one-dimensional distance dot matrix;
4) confirm the sweep frequency of Array CCD Camera according to high temperature strand pulling rate; Carry out the A/D conversion through the image that Array CCD Camera is collected, convert digital picture to, digital picture is carried out filtering and noise reduction handle; Through wavelet decomposition and texture analysis algorithm the casting billet surface image that collects is handled; Whether there is defective in the detected image, and defective is demarcated, confirm the position and the size at defective place; Obtain along the gray level image of high temperature strand diverse location on the pulling rate direction; Adopt image model identification Processing Algorithm that the degree of depth of high temperature casting billet surface defective is handled in addition, and detected defective is discerned automatically, belong to the defective of which kind of type to confirm this defective;
5) with defect type that obtains and size; And the degree of depth of defective is passed to database server through gigabit Ethernet; In server, merge and preserve; Be connected through gigabit Ethernet between the installing terminal at the quality inspection station, terminal and database server, through the testing result of the real-time display defect in terminal.
Can carry out quality evaluation to high temperature casting billet surface defective through above method, realize the online detection of casting billet surface defective.
The high temperature casting billet surface on-line detection device of defects that adopts above technical scheme to realize designs as follows: before fiery cutter 7, this device is installed; At this device front end high pressure argon gas descaling device 2 is installed; Adopt the high pressure argon gas to remove iron scale, covering slag and the moisture film of casting billet surface; High pressure argon gas descaling device 2 is removed the high temperature casting billet surface earlier; Can remove iron scale, covering slag and the moisture film etc. of casting billet surface largely, improve the degree of accuracy of present high temperature casting billet surface on-line detection device of defects effectively.
The high temperature strand is carried out online detection respectively in two surfaces up and down; The upper surface pick-up unit is installed in the roller-way top, and the lower surface pick-up unit is installed in the roller-way below, and pick-up unit comprises many table tops battle array ccd video camera 5 (confirming according to the strand width) and many structured light generating lasers 4; Video camera is placed on the high temperature strand transversely; Apart from 2 meters of strands, Array CCD Camera 5 is installed in the high temperature protection cover with LASER Light Source, and adopts argon shield and water-cooled; At straightening roller 1 pulse producer (figure does not draw) is installed, is given the sweep frequency that computing machine is accurately controlled Array CCD Camera 5 it.
The image that adjacent camera collects needs certain overlapping, and assurance can scan the image of whole high temperature casting billet surface; The position of structured light laser instrument is 2 meters apart from high temperature casting billet surface distance, and it is the green glow of 532nm that laser adopts wavelength, and the structured light laser instrument can send many narrow laser wire harness, can enlarge along the scope of throwing scanning direction; Before the camera lens of Array CCD Camera, adding centre wavelength is the arrowband color filter of 532nm, mainly is the ruddiness and the infrared light of filtering casting billet surface radiation, avoids the influence of bias light.
The image transfer that Array CCD Camera collects is given image model identification and the disposal system in the computing machine; This system carries out real-time analysis and processing to the figure that collects; All algorithms, the algorithm of measurement and classification of defects of detection, depth of defect that comprises defective is all in this completion.The defect type that this system obtains is passed to database server with the degree of depth of size and defective through gigabit Ethernet; In server, merge and preserve; Can preserve a large amount of defect information historical datas through massage storage; Be connected through gigabit Ethernet between the installing terminal at the quality inspection station, terminal and database server, through the terminal testing result of display defect in real time.
The technical scheme of the utility model has two outstanding advantages with respect to prior art:
1) installs the high pressure dephosphorization apparatus additional; The high pressure dephosphorization apparatus can be before detecting to the iron scale of high temperature casting billet surface; Covering slag and moisture film etc. carry out removing to a certain degree; Can improve False Rate and the discrimination of casting billet surface defect detecting device effectively, improve the precision of high temperature casting billet surface on-line detection device of defects the false defects such as iron scale, moisture film and covering slag of high temperature casting billet surface;
2) selection of structured light LASER Light Source; The utility model is selected the structured light LASER Light Source for use, and several narrow laser wire harness of projection on strand have enlarged along the sweep limit of throwing direction ccd video camera in the unit interval simultaneously, improve scan efficiency widely.
The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (5)
1. high temperature continuous casting billet surface imperfection on-line measuring device; Said pick-up unit mainly is made up of high pressure argon gas descaling device, structured light generating laser, Array CCD Camera, strand pick-up unit cabin; Structured light generating laser, Array CCD Camera are arranged in the strand pick-up unit cabin, it is characterized in that:
High pressure argon gas descaling device is arranged on the pick-up unit front end, is used to remove cataphracted iron scale, covering slag and the moisture film of casting billet surface;
Adopt the structured light generating laser as lighting source; Many green laser wire harness that send are projected the high temperature casting billet surface, are image collecting device with the Array CCD Camera, online acquisition high temperature casting billet surface laser light reflected light; Through image pick-up card IMAQ is got off; And carry out the A/D dress and change, be converted into digital picture, by computing machine digital picture is carried out filtering and noise reduction and handle; Casting billet surface image to collecting carries out advanced treating, thereby the form and the degree of depth of high temperature casting billet surface defective detected and form testing result;
Testing result is passed to database server through gigabit Ethernet, is connected through gigabit Ethernet between the installing terminal at the quality inspection station, terminal and database server, through the testing result of the real-time display defect in terminal.
2. high temperature continuous casting billet surface imperfection on-line measuring device according to claim 1 is characterized in that, adopts many table tops battle array ccd video camera and Duo Tai structured light generating laser, and Array CCD Camera is placed on the high temperature strand transversely, apart from 2 meters of strands.
3. high temperature continuous casting billet surface imperfection on-line measuring device according to claim 1 is characterized in that Array CCD Camera and structured light generating laser are installed in the high temperature protection cover, and adopts argon shield and water-cooled.
4. high temperature continuous casting billet surface imperfection on-line measuring device according to claim 1; It is characterized in that; The high temperature strand forwards through the straightening roller, on the straightening roller pulse producer is installed, and gives the sweep frequency that computing machine is accurately controlled Array CCD Camera with it.
5. high temperature continuous casting billet surface imperfection on-line measuring device according to claim 1 is characterized in that, it is the green glow of 532nm that laser adopts wavelength; Before the camera lens of Array CCD Camera, adding centre wavelength is the arrowband color filter of 532nm, and the ruddiness and the infrared light of the radiation of filtering casting billet surface are avoided the influence of bias light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220059548XU CN202548069U (en) | 2012-02-23 | 2012-02-23 | On-line detection device for surface defects of high temperature continuous casting billet |
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| CN201220059548XU CN202548069U (en) | 2012-02-23 | 2012-02-23 | On-line detection device for surface defects of high temperature continuous casting billet |
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| CN102608126A (en) * | 2012-02-23 | 2012-07-25 | 中冶连铸技术工程股份有限公司 | On-line detection method and device for surface defects of high-temperature continuously cast bloom |
| CN103383360A (en) * | 2013-07-29 | 2013-11-06 | 重庆理工大学 | Thin strip continuous casting billet surface defect sinusoidal grating phase shifting detection device and method |
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| US10744675B2 (en) | 2014-03-18 | 2020-08-18 | Corning Incorporated | Skinning of ceramic honeycomb bodies |
| IT202100015773A1 (en) * | 2021-06-16 | 2022-12-16 | Visiorobotics S R L | OPTICAL SYSTEM AND METHOD FOR ANALYZING A SURFACE |
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2012
- 2012-02-23 CN CN201220059548XU patent/CN202548069U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10634025B2 (en) | 2011-11-29 | 2020-04-28 | Corning Incorporated | Apparatus and method for skinning articles |
| CN102608126A (en) * | 2012-02-23 | 2012-07-25 | 中冶连铸技术工程股份有限公司 | On-line detection method and device for surface defects of high-temperature continuously cast bloom |
| CN103383360A (en) * | 2013-07-29 | 2013-11-06 | 重庆理工大学 | Thin strip continuous casting billet surface defect sinusoidal grating phase shifting detection device and method |
| CN103383360B (en) * | 2013-07-29 | 2016-01-13 | 重庆理工大学 | A kind of thin strap continuous casting blank surface defects sinusoidal grating phase shift detection device and detection method |
| US10611051B2 (en) | 2013-10-15 | 2020-04-07 | Corning Incorporated | Systems and methods for skinning articles |
| US10744675B2 (en) | 2014-03-18 | 2020-08-18 | Corning Incorporated | Skinning of ceramic honeycomb bodies |
| CN109746626A (en) * | 2019-03-04 | 2019-05-14 | 府谷县旭丽机电技术有限公司 | Plate wear grooves automatically scanning positioning system and method in a kind of coal fortune scratch board conveyor |
| IT202100015773A1 (en) * | 2021-06-16 | 2022-12-16 | Visiorobotics S R L | OPTICAL SYSTEM AND METHOD FOR ANALYZING A SURFACE |
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Granted publication date: 20121121 |