CN202045150U - Line light source light-section-method flatness measuring apparatus - Google Patents

Abstract

The utility model discloses a line light source light-section-method flatness measuring apparatus which comprises a light source module, an image acquisition module matched with the light source module, an image processing module connected with the image acquisition module, and a communication module connected with the image processing module, wherein the light source module comprises a plurality of LED (Light Emitting Diode) light sources, and a high-speed photographic device is used as the image acquisition module. As for the line light source light-section method flatness measuring apparatus provided by the utility model, a single-line transversal light-section and strip steel speed linkage image acquisition technology is adopted, so that the high-speed processing of images and a three-dimensional shape detection technology are realized, and the line light source light-section method flatness measuring apparatus has the advantages of high detection accuracy, simple maintenance, no damage on the surface of a steel plate and the like.

Description

Line source light cross-section method sheet shape measurer

Technical field

The plate shape that the utility model relates to cold-strip steel in the iron and steel production is detected, and particularly, is a kind of line source light cross-section method sheet shape measurer.

Background technology

In the band steel was produced, the control of plate shape was most important for raising strip surface quality, stable rolling process.It is the plate shape necessary condition of control automatically that plate shape is detected automatically, and all plate shape information are all from plate shape checkout gear, and advanced strip-mill strip generally disposes plate shape on-line detecting system.

At present, the main contact method for detecting shape such as cutting apart the roller type tension detection technique that uses in cold rolled strip steel production.Cutting apart the roller type tension checkout gear must contact with the cold-strip steel surface, because strip speed and roll speed are difficult to guarantee absolute consistent, the contact-making surface of band steel and roller has relative friction unavoidably, not only the plate shape measurement roller scratches easily, and the template measuring roller also can scratch belt steel surface, influences cold-strip steel template quality.Existing solution is at roller surfaces chromium plating or spraying or rubber-coated or other material, has in time carried out surface treatment, and the cut of belt steel surface can be controlled in certain scope, but certain life-span is arranged still, and maintenance cost is higher.

Particularly, this kind plate profile instrument mainly is made up of plate shape measurement roller, fundamental measurement system and plate shape measurement system etc.The plate shape measurement roller is the nucleus equipment of plate profile instrument, is to construct very complicated roller, and the body of roll is opened a measuring flume every 90 degree, is used to install and measure sensor, and four angles of sensor are fixed with briquetting.Sensor by the slip ring on the swivel joint, is delivered to the outside to signal from sensor along with roller rotates together, therefore, keep slip ring cleaning, wearing and tearing less, contact resistance is little extremely important, also is simultaneously a difficult problem.In sum, this scheme is had relatively high expectations to the installation site, and wearing and tearing are big, damage surface of steel plate easily.In addition, traditional plate shape roller accurate digital control processing capacity is very big, and the investment of mould and frock is huge.

The utility model content

The purpose of this utility model is to solve the above-mentioned defective that exists in the existing sheet shape measurer, thereby a kind of novel line source light cross-section method sheet shape measurer is provided.

Line source light cross-section method sheet shape measurer of the present utility model comprises light source module, image capture module, the image processing module that is connected with this image capture module that matches with this light source module and the communication module that is connected with this image processing module, wherein said light source module comprises a plurality of led light sources, and described image capture module is a high speed video camera.

Preferably, described communication module is connected to prototype.

Preferably, described image processing module comprises central processing unit, inputting interface and output interface.

Preferably, described inputting interface is a keyboard, and described output interface is a display.

Preferably, described communication module is the RS-422 serial communication modular.

Preferably, state led light source, be arranged at the top of described band steel board along on the band steel board width of described measuring instrument measurement.

Line source light cross-section method sheet shape measurer of the present utility model, adopt the single line lateral light to cut and strip speed interlock acquisition technology, realize image high speed processing and three-dimensional appearance detection technique, have the accuracy of detection height, safeguard advantages such as simply, not damaging surface of steel plate.

Description of drawings

Fig. 1 is the theory of constitution figure of line source light cross-section method sheet shape measurer of the present utility model;

Fig. 2 is the schematic diagram of an embodiment of the present utility model among Fig. 1;

Fig. 3 carries out the principle schematic that lateral light is cut detection for the utility model;

Fig. 4 is to utilizing the utility model that plate deformationization is carried out calculating principle figure.

The specific embodiment

Below with reference to the accompanying drawings and the specific embodiment, structure and the operation principle to line source light cross-section method sheet shape measurer of the present utility model specifically describes.

As shown in Figure 1, be the schematic diagram of line source light cross-section method sheet shape measurer of the present utility model.Fig. 2 more specifically forms schematic diagram in the embodiment of this measuring instrument.As shown in the figure, this measuring instrument comprise light source module 100, image capture module 200, the image processing module 300 that is connected with image capture module 200 that matches with light source module 100 and the communication module 400 that is connected with image processing module 300.Wherein light source module 100 comprises a plurality of led light sources, is used for producing the irradiation bright fringes, shines on the tested band steel board 1 (as shown in Figure 2).This bright fringes produces distortion along with the plate deformationization of band steel 1.Image capture module 200 is a high speed video camera, and it gathers and be converted to two-dimensional image data with the bright fringes curve.Image processing module 300 receives this two-dimensional image data, and application image treatment technology, demodulation obtains plate form height degree and changes, and further calculate plate shape information, communication module 400 is connected with prototype, be used for communicating, comprise from the parameter information of prototype receiving belt steel with prototype, and to prototype transfer plate shape information.

As shown in Figure 2, in image processing module 300, can comprise central processing unit 310, inputting interface 320 and output interface 330.Central processing unit 310 is used for data are carried out computing, and inputting interface 320 is used for the phase related control information is imported, and it can be input equipments such as keyboard, and output interface 330 is used for relevant information is shown, can be display devices such as display.Communication module 400 can be conventional serial or parallel communication module, for example RS-422 serial communication modular.

Further combined with Fig. 2,4, led light source (being light source module) 100 is arranged at the top of band steel board 1 along on band steel board 1 widths that will measure, thereby when led light source in working order the time, can be along the light belt that throws light on of formation on band steel board 1 width.The width of light belt and brightness can be adjusted according to field working conditions.More specifically, led light source 100 on band steel band steel rolling direction with certain gradient irradiation by measuring tape steel 1 surface, make the light source incident ray with in a certain angle by measuring tape steel 1 surface, the linear light source light belt is across by measuring tape steel 1.When the band steel produces shape wave because of flatness defect (as shown in Figure 3), deformation takes place in the straight line light belt along with band steel board 1 " waveform ", and the elevation information of band steel board 1 is modulated to the deformation signal of straightway.

Because the field working conditions complexity, light source module 100 can be selected according to different operating modes, the utility model preferred embodiment in, light source module 100 is preferably led light source.Led light source has the characteristics of brightness height, life-span length, irradiating width and adjustable brightness, can effectively improve the resolution ratio and the certainty of measurement of system.

As shown in Figure 3, laterally each point ribbon longitudinally extends situation, can utilize approximate percentage elongation or the wave degree of obtaining the longitudinal fiber bar of horizontal arbitrfary point of horizontal light belt in the image: (1) obtains the unrestrained high h1 of every horizontal wave curve at the place, arbitrfary point, h2 and h3 (as shown in Figure 3, arrow is a rolling direction); (2) their size of comparison is obtained maximum and is put the wave amplitude of vertical wave curve as this, " replaces actual mill length " with theoretical mill length; (3) obtain the wave degree of this ribbon again according to the formula of wave degree, thereby approximately obtain this and put plate shape information longitudinally.

Particularly, as shown in Figure 4,,, can utilize following formula to calculate the height change y of band steel position (the position P1 before the distortion, and the position P2 after the distortion) according to the geometrical relationship among the figure for to utilizing the utility model that plate deformationization is carried out calculating principle figure.

$y=\frac{\mathrm{aY}\sin {\mathrm{\θ}}_1}{b\sin \mathrm{\θ}\±Y\sin (\mathrm{\θ}+{\mathrm{\θ}}_1)}.$

Then, according to the mill speed of band steel, be provided with, adjust sampling time interval, can utilize the figure recovery technique, obtain the perfect information of plate deformationization, thereby provide reliable board form data for plate shape is controlled in the information of tape steel length direction.

Line source light cross-section method sheet shape measurer of the present utility model, in the requirement of the installation site of unit than other plate profile instrument require lowly, can be installed in planisher outlet (hightension zone) optional position in addition.And less input for the hardware of the laser triangulation sheet shape measurer that this line source light cross-section method sheet shape measurer is contactless equally, and the economy aspect has more advantage.

In addition, line source light cross-section method sheet shape measurer of the present utility model with linear pattern Laser Slabs shape checkout gear relatively, fully research and analyse belt plate shape and form characteristics, adopt the single line lateral light to cut and strip speed interlock acquisition technology, realize image high speed processing and three-dimensional appearance detection technique.Have the accuracy of detection height, safeguard advantages such as simply, not damaging surface of steel plate.

Claims (6)

1. line source light cross-section method sheet shape measurer, it is characterized in that, this measuring instrument comprises light source module, image capture module, the image processing module that is connected with this image capture module that matches with this light source module and the communication module that is connected with this image processing module, wherein said light source module comprises a plurality of led light sources, and described image capture module is a high speed video camera.

2. line source light cross-section method sheet shape measurer according to claim 1 is characterized in that described communication module is connected to prototype.

3. line source light cross-section method sheet shape measurer according to claim 1 and 2 is characterized in that described image processing module comprises central processing unit, inputting interface and output interface.

4. line source light cross-section method sheet shape measurer according to claim 3 is characterized in that described inputting interface is a keyboard, and described output interface is a display.

5. line source light cross-section method sheet shape measurer according to claim 1 and 2 is characterized in that described communication module is the RS-422 serial communication modular.

6. line source light cross-section method sheet shape measurer according to claim 1 and 2 is characterized in that, described led light source is arranged at the top of described band steel board along on the band steel board width of described measuring instrument measurement.

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