CN102319743A - Band steel deflection and floating quantity laser scanning detection method and deflection correction system - Google Patents
Band steel deflection and floating quantity laser scanning detection method and deflection correction system Download PDFInfo
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Abstract
The invention discloses a band steel deflection and floating quantity laser scanning detection method, which comprises the following steps that: 1) a linear laser emitter is used for irradiating the band steel, and a laser linear light beam is formed on the band steel in the width direction; 2) a plane array image sensor arranged above the band steel is used for scanning the laser linear light beam in real time; 3) the scanned laser linear light beam is sent into a computer, and the computer determines the band steel edges according to the laser linear light beam; and 4) the band steel deflection quantity can be calculated according to the band steel edges determined by the computer at different moments, and simultaneously, the upwards and downwards floating quantity of the band steel can be calculated according to the displacement quantity of the laser linear light beam in the length direction of the band steel. The band steel deflection and floating quantity laser scanning detection method has the advantages that the cost is low, the detection precision is high, the real-time performance and the anti-jamming capability are high, the long-time stable operation can be realized in complicated environment, the band steel deflection automatic detection level is favorably improved, the installation and the maintenance of equipment are convenient, and the technical support is provided for the efficient production of the band steel.
Description
Technical field
The present invention relates to strip running deviation and floating amount laser scanning detection method and deviation-rectifying system; Be primarily aimed at the horizontal sideslip of cold hot-strip running, up and down floating, and the template real-time quantization detects and the correction amount is exported to correction executing mechanism; Also can be applicable to simultaneously continuous casting steel billet, the detection of square billet template; And other deviation rectification of strip applications (for example: light metal industry, copper industry, printing and bookbinding industry and papermaking and rubber chemistry industry etc.) detection in real time, belong to metallurgical technology field.
Background technology
Band steel continuous processor group deviation phenomenon often occurs in wearing band and production process, its result not only can cause steel defect generation, lumber recovery to reduce, and also can influence the normal operation of unit and damage production equipment, and then cause the production ability drop.(the Edge Position Control of deviation rectification of strip system; Be called for short EPC) be the common technology on the steel rolling production-line; Be widely used in pickling, cold and hotly roll, in the unit such as smooth, coated layer, rewinding, shearing; Because receive factor affecting such as the inhomogeneous and strip tension fluctuation of installation accuracy, roller group deviation and vibration, roller long term wear, the band section of each equipment of unit, strip running deviation has become common phenomenon.Therefore, detect the transversal displacement of band steel in real time effectively, and implement correction control; Be to guarantee that band steel processing unit carries out smoothly, improve key one ring that the band steel is handled quality, this can guarantee to transport with the fault-free of steel; Neat in edge when batching, and in packing, transport and pile up all very convenient, help being with steel to accomplish technical indicator preferably; Increase economic efficiency, reduce cost.
Practice shows that deviation phenomenon is that objective reality is inevitable.Therefore, how adopting effective sideslip detection technique, accurately detect the running deviation value of band and send signal in real time to correction executing mechanism, satisfy manufacturing technique requirent, is the key point of dealing with problems.Theoretically,, just can control the correction executing mechanism action in real time according to result of calculation if can accurately calculate the side-play amount in the band steel running, but the accurately quick very difficulty of calculating of these data.Because the main cause of sideslip is owing to band steel this body shape and plant equipment alignment error cause, therefore, the method for employing numerical computations can exist and much be difficult to the boundary condition confirmed.The recognition methods of existing band sideslip mainly realizes through various sensors, three types of the total at present inductance type of band steel measuring transducer, condenser type, photo-electrics etc.At present, the external detection technique comparative maturity of this aspect, but technical sophistication; Cost is high; Apparatus expensive, and the strip running deviation of domestic independent development detection control system is zero basically, its main cause is that the Design of Sensor technology is immature; Accuracy of detection is low, and can not guarantee to move reliably and with long-term.
Summary of the invention
To the above-mentioned deficiency that prior art exists, the purpose of this invention is to provide a kind of simple in structure, cost is low, accuracy of detection is high, real-time, strip running deviation and floating amount laser scanning detection method that antijamming capability is strong.
The present invention has designed a cover strip running deviation deviation-rectifying system based on this detection method simultaneously.
The technological means that the present invention solves the problems of the technologies described above is achieved in that
Strip running deviation and floating amount laser scanning detection method, its detection step is:
1) utilizes linear laser transmitter (inclination certain angle) irradiation band steel, on the strip width direction, form a high brightness laser linear beam, laser rays shaped light beam all standing strip width and greater than strip width perpendicular to length direction;
2) above the band steel, array image sensor is set, by array image sensor real time scan laser rays shaped light beam, the array image sensor scanning direction is perpendicular to belt steel surface;
3) the laser rays shaped light beam of scanning is sent into computer; Because there is evident difference in the laser rays shaped light beam between image and the image outside the band steel of band on the steel; There is tangible line of demarcation at the place at the strip edge edge, can confirm the strip edge edge by computer through this difference;
4) the strip edge edge of confirming according to difference moment computer can calculate the strip running deviation amount, and restructural goes out the plate shape form (i.e. two long edge wheel profiles) with steel; Can calculate band steel floating amount up and down according to the displacement (height of faying face array image sensor again) of laser rays shaped light beam on band steel length direction simultaneously.
A kind of strip steel deviation system; It comprises the velocity measurement mechanisms of strip speed detection and the correction executing mechanism behind the strip running deviation; Above the band steel, be provided with to be used to shine and be with steel with linear laser transmitter that forms the laser rays shaped light beam in the strip width direction and the array image sensor that is used to catch the laser rays shaped light beam, linear laser transmitter and array image sensor are located at respectively in the high temperature protection cover; Said array image sensor is connected with control module through image pick-up card, and the output of velocity measurement mechanisms connects control module, and control module is connected with correction executing mechanism through signaling conversion circuit.
The high temperature protection cover at linear laser transmitter place is communicated with the refrigerating gas conveying mechanism, in the high temperature protection cover at linear laser transmitter place, carries refrigerating gas by the refrigerating gas conveying mechanism.
The high temperature protection cover front at array image sensor place is equipped with the colour filter that only lets the laser rays shaped light beam pass through.
The imaging target surface of array image sensor is parallel with band steel upper surface.
Said velocity measurement mechanisms is located on the driven roller of rotating band steel operation, confirms strip speed according to the rotating speed of driven roller.
Said array image sensor is area array CCD/cmos image sensor.
The present invention can detect the strip running deviation amount and (floating) amount that fluctuates simultaneously, realized the monitoring of the operating edge configuration of band steel with optical imaging method through image processing techniques, and accuracy of detection is controlled.The present invention realizes scanning fast according to band steel transfer rate, and reconstructs laser rays strip edge edge dot matrix image trend in real time, and according to the plate deformation form in the visual band steel of the dual edge form running.
This checkout gear field of detection width is big; Can be in the medium-term and long-term stable operation of complex environment; The high light that can exempt beyond industry spot electromagnetism and the laser rays spectrum disturbs and temperature effect, but gives correction executing mechanism through signaling conversion circuit synchronous transfer deviation correcting signal, helps improving strip running deviation automation detection level; Equipment is convenient for installation and maintenance, to the High-efficient Production of being with steel technical support is provided.
The present invention can be widely used in various CPC and the EPC detection system, especially to strip running deviation, unsteady and plate shape detection under the complicated bad border, and the detection of continuous casting blanket shape, belt material production efficiency is played direct impetus.
Description of drawings
Fig. 1-strip steel deviation system architecture sketch map of the present invention.
Fig. 2-the sideslip of the present invention and the measurement amount sketch map that fluctuates.
Fig. 3-signals collecting of the present invention and data sketch map.
The specific embodiment
Strip running deviation of the present invention and floating amount laser scanning detection method, its detection step is:
1) utilizes linear (live width 1mm) generating laser (inclination certain angle) irradiation band steel; Go up in strip width direction (promptly horizontal) and to form a high brightness laser linear beam, laser rays shaped light beam all standing strip width and greater than strip width perpendicular to length direction (be traffic direction or vertically);
2) above the band steel, array image sensor is set; By array image sensor real time scan laser rays shaped light beam; The array image sensor scanning direction is perpendicular to belt steel surface (target surface that promptly forms images is parallel with belt steel surface, calculates simply like this, is more conducive to subsequent calculations and data); Array image sensor real time scan frame per second depends on band steel speed; And require selected array image sensor (video camera) rate, the angle of view, frame per second (the present invention selects the high-speed camera imaging) and vertical setting height(from bottom) respectively according to accuracy of detection;
3) belt steel surface laser rays shaped light beam is carried out rapid image scanning and handles in real time, and calculate the vertical floating amount of plain displacement of the horizontal left and right edges of band steel place laser lines laser image spot and laser lines.Specifically; Because there is evident difference in the laser rays shaped light beam between image and the image outside the band steel of band on the steel; There is tangible line of demarcation in the place at the strip edge edge, as long as the laser rays shaped light beam of scanning is sent into computer, can confirm the strip edge edge by computer through this difference;
4) the strip edge edge of confirming according to difference moment computer can calculate the strip running deviation amount, and restructural goes out the plate shape form (i.e. two long edge wheel profiles) with steel; Can calculate band steel floating amount up and down according to the displacement (height of faying face array image sensor again) of laser rays shaped light beam on band steel length direction simultaneously.
The present invention has also designed a cover strip steel deviation system according to above-mentioned detection method; See Fig. 1; It comprises the velocity measurement mechanisms 1 of strip speed detection and the correction executing mechanism behind the strip running deviation; Above the band steel, be provided with to be used to shine and be with steel to form the linear laser transmitter 2 and the array image sensor 3 that is used to catch the laser rays shaped light beam of laser rays shaped light beam in the strip width direction, linear laser transmitter 1 is located at respectively in the high temperature protection cover 4 with array image sensor 3; Said array image sensor 3 is connected with control module through image pick-up card, and the output of velocity measurement mechanisms 1 connects control module, and control module is connected with correction executing mechanism through signaling conversion circuit.
Be elaborated in the face of each several part down
1. high accuracy linear laser transmitter is installed, with special angle oblique fire belt steel surface.
Linear laser transmitter of the present invention is the He-Na generating laser, is installed in the high temperature-resistant acid-resistant protective cover, and protective cover adopts Ha Shi B-2 alloy to process.The high temperature protection cover at simultaneously linear generating laser place is communicated with the refrigerating gas conveying mechanism, and refrigerating gas (like clean nitrogen) is carried so that protective cover is high temperature resistant in protective cover.The linear laser transmitter is installed according to certain angle (laser rays shadow surface and belt steel surface are less than 90 greater than 0 degree angle), on band steel athwartship plane, forms the high brightness laser linear beam perpendicular to traffic direction.
2. the array image sensor that is used to extract belt steel surface laser rays change information is installed
Array image sensor of the present invention is the area array CCD/cmos image sensor of high speed high-resolution; Array image sensor is installed in the acidproof protective cover of high temperature, and before protective cover, installs the specific wavelength colour filter additional, its objective is to guarantee IMAQ quality and protection camera lens; Prevent that simultaneously other wavelength light source from disturbing imaging; Imageing sensor imaging target surface is parallel with band steel operation surface in the installation process, and becomes the certain space angular relationship with the laser rays irradiated plane, sees Fig. 1.
3. in order to make native system be convenient to install and debugging; Array image sensor and linear laser transmitter link together; The high accuracy angle regulator is installed in the junction; Be used for the relative angle between the shadow surface of imaging primary optical axis and generating laser of adjusting range array image sensor; Be used for the algorithm process unit and demarcate and calculate band steel scan image transverse edge and vertical hot spot pixel displacement in real time, and the accuracy of detection secondary that makes an experiment is demarcated, to guarantee the accuracy of detection of band horizontal running deviation value of steel and floating amount according to the particular space relation.
4. steel plate operation velocity measurement mechanisms is installed at designated groups roller place; Exact acquisition band steel passes fast signal; And send the software processes unit in the control module to control the camera frame scan frequency in real time, its purpose is edge sideslip trend and the template form in accurate reconstruct and the visual band steel running.
5. strip running deviation amount and the amount of fluctuating method for distilling
Characteristics of the present invention are to have combined the theoretical and computer digital image treatment technology of laser triangulation, when detecting band steel operation running deviation value, can detect the amount of fluctuating of steel plate.Its method is to adopt laser instrument oblique fire and CCD/CMOS area array camera vertical irradiation method to carry out.This method can be through behind the partitioned image area-of-interest (ROI); Quick positioning belt steel transverse edge laser lines location of pixels information; And calculate the operating floating amount up and down of band steel according to the length travel amount of laser lines, being output as displacement of actual band steel and floating measured value through demarcating the conversion of pixel displacement amount.It is as shown in Figure 2 that it measures signal.Wherein the arrow of lower left representes to be with the steel traffic direction; The ROI district that delimit in the frame of broken lines presentation video; 1. and 2. mark represents band steel left and right edges displacement location point (being used to detect sideslip) respectively, and 3. mark is promptly schemed the left and right sides arrow at middle part and represented laser rays vertical floating variable quantity (being used to detect floating amount).
In the scanning process; In the ROI zone of dividing; Through
scanning direction locating laser line steel plate sideslip displacement; The edge anchor point is a 1. 2. mark of image, can obtain the floating amount information of steel plate simultaneously through the displacement that extracts laser rays
direction pixel.
In array image sensor (video camera) the laser lines scanning process; The pixel count of laser lines on the steel plate (promptly 1. arriving the 2. line thickness between the gauge point) is handled stitching algorithm according to certain image; The visual strip edge edge form that reconstructs; And then showing the template shape characteristic in the running in real time, the detection system information processing manner is as shown in Figure 3.
The present invention can quantize to detect the horizontal running deviation value of band steel effectively, adopts the method for image not only can guarantee real-time accuracy of detection, plate deformationization that again can online visual band steel; Simultaneously, also can quantize to detect to the floating state up and down of being with the steel running, but and the whole pattern of three-dimensionalreconstruction band steel.Commercial Application of the present invention, to the automatization level that improves cold hot-strip, reduce production costs, enhance productivity significant; Simultaneously, exploitation correction executing mechanism and improvement band steel are transmitted technology, improve the band steel quality of production and have important directive function.In addition, the present invention is applicable to that also the sideslip in the non-ferromagnetic or non-electrical conductance process of producing product detects, for example, and light metal industry, coppersmith industry, printing and bookbinding, plastics and rubber chemistry industry, paper-making industry, fiber and textile industry etc.
Above-mentioned enforcement of the present invention only be for explanation the present invention did for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation and changes.Here can't give exhaustive to all embodiments.Everyly belong to the row that conspicuous variation that technical scheme of the present invention amplifies out or change still are in protection scope of the present invention.
Claims (8)
1. strip running deviation and floating amount laser scanning detection method is characterized in that: it detects step and is:
1) utilizes linear laser transmitter irradiation band steel, form a laser rays shaped light beam, laser rays shaped light beam all standing strip width and greater than strip width perpendicular to length direction in the strip width direction;
2) above the band steel, array image sensor is set, by array image sensor real time scan laser rays shaped light beam;
3) the laser rays shaped light beam of scanning is sent into computer, confirm the strip edge edge according to the laser rays shaped light beam in image and the difference between the image outside the band steel of band on the steel by computer;
4) the strip edge edge of confirming according to difference moment computer can calculate the strip running deviation amount; Can calculate band steel floating amount up and down according to the displacement of laser rays shaped light beam on band steel length direction simultaneously.
2. strip running deviation according to claim 1 and floating amount laser scanning detection method is characterized in that: said linear laser transmitter oblique illumination band steel, the array image sensor scanning direction is perpendicular to belt steel surface.
3. strip steel deviation system; It comprises the velocity measurement mechanisms of strip speed detection and the correction executing mechanism behind the strip running deviation; It is characterized in that: above the band steel, be provided with to be used to shine and be with steel with linear laser transmitter that forms the laser rays shaped light beam in the strip width direction and the array image sensor that is used to catch the laser rays shaped light beam, linear laser transmitter and array image sensor are located at respectively in the high temperature protection cover; Said array image sensor is connected with control module through image pick-up card, and the output of velocity measurement mechanisms connects control module, and control module is connected with correction executing mechanism through signaling conversion circuit.
4. strip steel deviation according to claim 3 system; It is characterized in that: the high temperature protection cover at linear laser transmitter place is communicated with the refrigerating gas conveying mechanism, in the high temperature protection cover at linear laser transmitter place, carries refrigerating gas by the refrigerating gas conveying mechanism.
5. according to claim 3 or 4 described strip steel deviation systems, it is characterized in that: the high temperature protection cover front at array image sensor place is equipped with the colour filter that only lets the laser rays shaped light beam pass through.
6. strip steel deviation according to claim 5 system is characterized in that: the imaging target surface of array image sensor is parallel with band steel upper surface.
7. strip steel deviation according to claim 6 system is characterized in that: said velocity measurement mechanisms is located on the driven roller of rotating band steel operation, confirms strip speed according to the rotating speed of driven roller.
8. strip steel deviation according to claim 6 system, it is characterized in that: said array image sensor is area array CCD/cmos image sensor.
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