CN102500627B - Plate width, side shape and side defect measuring instrument and measuring method thereof - Google Patents

Plate width, side shape and side defect measuring instrument and measuring method thereof Download PDF

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Publication number
CN102500627B
CN102500627B CN 201110319521 CN201110319521A CN102500627B CN 102500627 B CN102500627 B CN 102500627B CN 201110319521 CN201110319521 CN 201110319521 CN 201110319521 A CN201110319521 A CN 201110319521A CN 102500627 B CN102500627 B CN 102500627B
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sheet
measurement
width
tested
limit
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CN 201110319521
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Chinese (zh)
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CN102500627A (en
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邱忠义
杨溪林
赵宏
胡宇
邹凤欣
由菁菁
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北京金自天正智能控制股份有限公司
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Abstract

The invention discloses a plate width, side shape and side defect measuring instrument and a measuring method thereof; the instrument comprises two sets of side measuring devices, a measurement control cabinet and a displayer; the method comprises the steps that: first, a user calibrates the measurement datum planes of the side measuring devices; second, a linear laser radiates the surface of the thickness direction of a measured plate, and a vertical laser radiation line is formed; third, a high-definition surface scanning camera quickly shoots the changes of the position of the laser radiation line of the side surface of the measured plate which is moving, and an image which is shot by the high-definition surface scanning camera is sent to a data acquisition board card; fourth, the data acquisition board card acquires the position of each point on the laser radiation line of the side surface of the measured plate and transmits the positions to the measurement control cabinet; and fifth, the measurement control cabinet measures the distance between the side of the measured plate and a base position through an optical triangular method, and the plate width, side shape and side defects of the plate are obtained.

Description

A kind of width of sheet material, limit section shape, edge fault measuring instrument and measuring method

Technical field

The invention belongs to the field of measuring technique of optical, mechanical and electronic integration, be specifically related to width, the limit section shape of sheet material under the hot rolling environment, the comprehensive on-line measurement of edge fault.

Background technology

Hot rolled heavy plate, middle plate, the width parameter of band steel, surface quality parameter are to describe the important indicator of product quality, in order to make sheet material carry out in process of production width control or according to width index and surface quality index, product to be classified, all width and surface quality measuring instrument need to be installed on production line.Usually sheet material is installed the quality that the surface quality measuring instrument is only measured upper and lower surface, and the crack defect of sheet material side surface does not have economic measuring method reliably.The sheet material width measure is divided into laser width instrument and optical camera width instrument.Optical camera method width measure hookup wire array camera above tested sheet material, utilize the optics contrast of hot sheet material itself and environment or background light source be installed below sheet material, and video camera carries out imaging to sheet material, and then the sheet material measurement width.The laser width instrument is applicable to the width measure of Wide and Thick Slab, the a set of measurement mechanism of each side installation at sheet material, every cover measurement mechanism comprises a dot laser and a linear array video camera, dot laser sends the side of beam of laser vertical irradiation to tested sheet material, side at sheet material forms a some shaped laser spot, during the sheet material change width, the position of laser facula changes thereupon, the linear array video camera is measured the location variation of hot spot, the measurement mechanism synchronization of sheet material both sides is measured respectively the location variation of hot spot, can obtain the width value of sheet material, this width value is the numerical value of a bit, can not complete reflection sheet material section width.2 of W10 width gage employings or a plurality of dot laser of Belgium IRM company can solve the limitation that the single-point laser device is measured width to a certain extent, the also limit section shape of sheet material measurement to a certain degree, discontinuity due to point-source light ray, in the limit of sheet material section, width measure is also discontinuous, therefore, the precision of describing the sheet material edge shape is not high, can not measure edge fault.Its camera and laser instrument are in a plane of vertical direction simultaneously, the main purpose of selecting two-dimentional camera is that during laser positions generation left-right deviation, video camera can also capture signal in order to debug conveniently, in addition, two-dimentional camera is identical with the effect of one dimension camera.

As shown in Figure 1, in the plate rolling process, several shapes shown in a in figure, b, c may appear in cross section, wherein in figure, b is limit section protruding type proportion maximum, and when sheet metal thickness is larger, outstanding size is larger, any surveys the actual width that sheet material can not be described in wide measurement point position on sheet material comprehensively, as can be seen here:

During the width of the larger sheet material of above-mentioned width gage detect thickness, have some limitations, only measure the width value of a certain position of sheet material section, the parameters such as the width maximum of section, minimum of a value, mean breadth value can not be measured, more accurately the sheet material measurement edge fault.

Summary of the invention

To the objective of the invention is in order addressing the above problem, to propose a kind of width, limit section shape, edge fault measuring instrument and measuring method of sheet material.

A kind of width of sheet material, limit section shape, edge fault measuring instrument, comprise two cover limit section measurement mechanisms, measure switch board and display;

Two cover limit section measurement mechanisms lay respectively at tested sheet material bilateral symmetry setting, limit section measurement mechanism and sheet material co-altitude; Each limit section measurement mechanism includes metal cabinet, full HD smear camera, laser line generator, data collecting plate card and power supply; Full HD smear camera, laser line generator, data collecting plate card, power supply all are positioned at metal cabinet inside, and power supply is full HD smear camera, laser line generator, data collecting plate card power supply; Metal cabinet is provided with light hole near sheet material one side, the corresponding light hole of the imaging optical path of full HD smear camera, the corresponding light hole of the emitting light path of laser line generator; Laser line generator is installed in sheet material in the lateral vertical of sheet material, and the line laser of launching is radiated at sheet metal thickness direction surface, forms the Ear Mucosa Treated by He Ne Laser Irradiation line perpendicular to sheet material; High definition face smear camera and laser line generator equal height arrange, and the optical centreline of high definition face smear camera and the center line angle of laser instrument are the 30-60 degree; The change in location of the tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line that high definition face smear camera high-speed capture is being moved, the image that high definition face smear camera is taken is sent to data collecting plate card; Data collecting plate card receives the image of the Ear Mucosa Treated by He Ne Laser Irradiation line of high definition face smear camera shooting, and the position that obtains every bit on tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line, transfer to the measurement switch board by positional information; The user sets datum level according to maximum changing range and the maximum of sheet material on the production line scope that swings of sheet material width on production line; The location transmission of the every bit that data collecting plate card during measurement in two cover limit section measurement mechanisms obtains respectively is to measuring switch board, measure switch board and obtain the position of every bit and the distance of datum level, then, the tested sheet material left-right symmetry location point measured according to the limit section measurement mechanism synchronization of tested sheet material both sides and the distance of datum level, calculate the width value of this tested sheet material in position; By every bit on tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line apart from composograph, obtain the side view of tested sheet material Ear Mucosa Treated by He Ne Laser Irradiation line position, and then obtain width, limit section shape, the edge fault of this measurement section sheets; When sheet material travels forward, continuous measurement obtains width value and the side view of all sections of sheet material and analyzes the degree of edge fault, and then obtain the position of tested sheet material section width maximum, minimum of a value, mean value, maximum and minimum of a value, carry out the quality judgement in conjunction with the edge fault measured and limit section shape; Measure switch board is shown position, limit section shape, the edge fault of the sheet material section width maximum, minimum of a value, mean value, maximum and the minimum of a value that obtain on display.

A kind of width of sheet material, limit section shape, edge fault measuring method comprise following step:

The first step, the user demarcates the measurement datum of limit section measurement mechanism;

The user sets datum level according to maximum changing range and the maximum of sheet material on the production line scope that swings of sheet material width on production line, and the measurement datum of two cover limit section measurement mechanisms is demarcated, and obtains reference position;

Second step, laser line generator irradiates tested sheet material thickness direction surface, forms the Ear Mucosa Treated by He Ne Laser Irradiation line of vertical direction;

Laser line generator irradiates tested sheet material, at the thickness direction of tested side face of plate material, forms vertical Ear Mucosa Treated by He Ne Laser Irradiation line;

The 3rd step, the change in location of the tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line that high definition face smear camera high-speed capture is being moved, the image that high definition face smear camera is taken is sent to data collecting plate card;

The 4th step, data collecting plate card obtains the position of every bit on tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line, transfers to the measurement switch board;

The 5th step, measure switch board and adopt the optical triangulation method to measure the distance value of tested sheet material edge and reference position, obtains width, limit section shape, the edge fault of sheet material;

The present invention adopts laser triangulation to be specially: the measuring basis position of establishing limit section measurement mechanism is the O point, when having sheet material to pass through measuring position, Ear Mucosa Treated by He Ne Laser Irradiation is O ' point on sheet material, full HD smear camera photographs the variation of Ear Mucosa Treated by He Ne Laser Irradiation facula position, intelligentized data collecting plate card gathers O ' position signalling, process through image the exact position that obtains at O ' and send the measurement switch board, measure switch board and depart from the distance h of reference position through calculating the board measure point; The datum level that the two cover limit sections measurement mechanisms of installing in the sheet material bilateral symmetry are set apart from w 0the width value that is less than narrow boards material deducts the maximum magnitude that swing of sheet material on production line;

Suppose that the distance of measuring at the left side portion measurement mechanism in tested sheet material sustained height left-right symmetry position is h 1, the distance that right edge section measurement mechanism is measured is h 2, the width value of tested this height of sheet material is:

W=h 1+w 0+h 2????????????????????????????????????????????????????????????(1)

The width value of all thickness positions of sheet material that synchronization in same plane is measured carries out statistical analysis, be engraved in Breadth Maximum value, minimum widith value, mean breadth value and the maximum of measuring position sheet material, the position of minimum widith value while obtaining this, all width values are shown with image format on display, obtain the shape of sheet material at this section; The speed of producing according to sheet material, be spliced into figure by the sheet material section configuration of continuous measurement, obtains the limit section shape of sheet material; Situation of change according to analyzing the sheet material edge shape, judge whether sheet material edge exists the size and shape of defect and defect.

The invention has the advantages that:

(1) the present invention's composite measurement of sheet material width, limit section shape, edge fault that adopted a measuring instrument to solve.

(2) the present invention adopts line laser light source and face array camera, can Measurement accuracy sheet material edge shape and according to the width of limit section shape accurate Calculation sheet material and measure the position of tested sheet material section width maximum, minimum of a value, mean value, max min constantly, improved certainty of measurement.

(3) the limit section shape of the present invention by continuous measurement sheet material can sheet material measurement edge fault (as split on limit) according to the variation of limit section shape.

(4) field measurement apparatus of the present invention is arranged on the side of tested sheet material, and impact reduces on device for high temperature, flue dust, steam, reduces on-the-spot protection difficulty, reduces costs.

(5) on-line measurement instrument provided by the invention simply is easy to manufacture, and cost is low, is suitable for large-scale promotion and uses.

The accompanying drawing explanation

Fig. 1 is tested sheet material section configuration schematic diagram in background technology;

Fig. 2 is structural representation of the present invention;

Fig. 3 is plan structure schematic diagram of the present invention;

Fig. 4 is method flow diagram of the present invention;

Fig. 5 is laser triangulation range measurement principle schematic diagram of the present invention.

In figure:

The measurement mechanism 2-of 1-limit section measures switch board 3-display

Full HD smear camera 102-laser line generator of 4-sheet material 101-

103-data collecting plate card 104-metal cabinet 105-light hole

The specific embodiment

Below in conjunction with drawings and Examples, the present invention is described in further detail.

The present invention is a kind of width, limit section shape, edge fault measuring instrument of sheet material, as shown in Figure 1, comprises two cover limit section measurement mechanisms 1, measures switch board 2 and display 3.

Two cover limit section measurement mechanisms 1 lay respectively at the 4 bilateral symmetry settings of tested sheet material, limit section measurement mechanism 1 and sheet material 4 co-altitudes.Each limit section measurement mechanism 1 includes metal cabinet 104, full HD smear camera 101, two parallel laser line generators 102, data collecting plate card 103 and power supplies.

Full HD smear camera 101, two parallel laser line generators 102, data collecting plate card 103, power supplies all are positioned at metal cabinet 104 inside, metal cabinet 104 has the on-the-spot safeguard functions such as water cooling and air purge, guarantees that the enclosure interior temperature is in electronic devices and components work allowable temperature scope.Power supply is full HD smear camera 101, two parallel laser line generators 102, data collecting plate card 103 power supplies.

Metal cabinet 104 is provided with three light holes 105 near sheet material 4 one sides, light hole 105 is provided with and prevents flue dust, aqueous vapor pollution blow device, the imaging optical path of light hole 105 corresponding full HD smear cameras 101, the emitting light path of two light hole 105 respectively corresponding two parallel laser line generators 102.

Two laser line generators 102 are installed in sheet material 4 in the lateral vertical of sheet material 104, and the two bunch Ear Mucosa Treated by He Ne Laser Irradiations that two laser line generators 102 are launched, on sheet material 4 thickness direction surfaces, form 2 lines of the Ear Mucosa Treated by He Ne Laser Irradiation perpendicular to sheet material 4.

Two laser line generators 102 are at a distance of 20mm-100mm (determining according to the speed of sheet material 4).For the sheet material 4 of low-speed motion, 1 laser line generator 102 is set in the present invention also passable, when sheet material speed is high, sheet material 4 change in location of full HD smear camera 101 each hardwood picture photographing are large, can affect the measurement (little defect is leaked and clapped) of edge fault.When the speed of production of sheet material 4 is high, laser line generator 102 can be increased to 3-4.To sum up, laser line generator 102 of the present invention is 1 to 4.While changing laser line generator 102 number, the corresponding number that changes light hole.

High definition face smear camera 101 and laser line generator 102 equal height settings, the optical centreline of high definition face smear camera 101 and the center line angle of laser instrument 102 are the 30-60 degree, and concrete angle is determined in the Instrument Design stage according to the Breadth Maximum excursion of tested sheet material 4.The change in location of the tested sheet material 4 side Ear Mucosa Treated by He Ne Laser Irradiation lines that high definition face smear camera 101 high-speed captures are being moved, the image that high definition face smear camera 101 is taken is sent to data collecting plate card 103.

Data collecting plate card 103 receives the image of the Ear Mucosa Treated by He Ne Laser Irradiation line of high definition face smear camera 101 shootings, and the position that obtains every bit on tested sheet material 4 side Ear Mucosa Treated by He Ne Laser Irradiation lines transfers to positional information to measure switch board 2.

Set datum level according to maximum changing range and the maximum of sheet material 4 on the production line scope that swings of 4 width of sheet material on production line.The location transmission of the every bit that the data collecting plate card 103 during measurement in two cover limit section measurement mechanisms 1 obtains respectively is to measuring switch board 2, measure switch board 2 and obtain the position of every bit and the distance of datum level, then, the tested sheet material 4 left-right symmetry location points that measure according to limit section measurement mechanism 1 synchronization of tested sheet material 4 both sides and the distance of datum level, calculate the width value of the tested sheet material 4 in this position.By every bit on tested sheet material 4 side Ear Mucosa Treated by He Ne Laser Irradiation lines apart from composograph, obtain the side view of tested sheet material 4 Ear Mucosa Treated by He Ne Laser Irradiation line positions, and then obtain width, limit section shape, the edge fault of this measurement section sheets.As shown in Figure 3, when sheet material 5 travels forward, continuous measurement obtains width value and the side view of sheet material 4 all sections and analyzes the degree of edge fault, and then obtain the position of tested sheet material 4 section width maximums, minimum of a value, mean value, maximum and minimum of a value, carry out the quality judgement in conjunction with the edge fault measured and limit section shape.

Measure switch board 2 is shown position, limit section shape, the edge fault of the sheet material 4 section width maximums, minimum of a value, mean value, maximum and the minimum of a value that obtain on display 3.

All measurement data are stored in measurement switch board 2, as the foundation of tracing product quality the user fixed time.Described measurement data refers to position, limit section shape, the edge fault of sheet material 4 section width maximums, minimum of a value, mean value, maximum and minimum of a value.

A kind of width of sheet material, limit section shape, edge fault measuring method as shown in Figure 4, comprise following step:

The first step, the user demarcates the measurement datum of limit section measurement mechanism 1;

The user sets datum level according to maximum changing range and the maximum of sheet material 4 on the production line scope that swings of 4 width of sheet material on production line, and the measurement datum of two cover limit section measurement mechanisms 1 is demarcated, and obtains reference position;

Second step, laser line generator 102 irradiates tested sheet material 4 thickness direction surfaces, forms the Ear Mucosa Treated by He Ne Laser Irradiation line of vertical direction;

Two laser line generators 102 irradiate tested sheet material 4, and the thickness direction in tested sheet material 4 sides forms two parallel Ear Mucosa Treated by He Ne Laser Irradiation lines; When 1 of employing or 3,4 laser line generators 102, obtain different number Ear Mucosa Treated by He Ne Laser Irradiation lines, while obtaining many, the Ear Mucosa Treated by He Ne Laser Irradiation line parallel;

The 3rd step, the change in location of the tested sheet material 4 side Ear Mucosa Treated by He Ne Laser Irradiation lines that high definition face smear camera 101 high-speed captures are being moved, the image that high definition face smear camera 101 is taken is sent to data collecting plate card 103.

The 4th step, data collecting plate card 103 obtains the position of every bit on tested sheet material 4 side Ear Mucosa Treated by He Ne Laser Irradiation lines, transfers to and measures switch board 2.

The 5th step, measure switch board 2 and adopt the optical triangulation method to measure the distance value of tested sheet material 4 Bu Yu reference positions, limit; Obtain width, limit section shape, the edge fault of sheet material.

The present invention adopts laser triangulation to be specially: as shown in Figure 5, if the measuring basis position of limit section measurement mechanism 1 is the O point, when sheet material 4 is arranged by measuring position, Ear Mucosa Treated by He Ne Laser Irradiation is O ' point on sheet material, full HD smear camera 101 photographs the variation of Ear Mucosa Treated by He Ne Laser Irradiation facula position, intelligentized data collecting plate card 103 gathers O ' position signalling, process through image the exact position that obtains at O ' and send measurement switch board 2, measure switch board 2 and depart from the distance h of reference position through calculating sheet material 4 measurement points.Measurement datum being set as shown in Figure 5, is the vertical plane of ordering through O, should consider maximum changing range and the swing scope of sheet material 4 on production line of production line sheet material 4 width while setting datum level.The datum level that the two cover limit sections measurement mechanisms 1 of installing in sheet material 4 bilateral symmetry are set apart from w 0the width value that is less than narrow boards material 4 deducts the maximum magnitude that swing of sheet material 4 on production line.

Suppose that the distance of measuring at the tested sheet material 4 left side portion measurement mechanisms 1 in sustained height left-right symmetry position is h 1, the distance that right edge section measurement mechanism 1 is measured is h 2, the width value of tested sheet material 4 these height is:

W=h 1+w 0+h 2????????????????????????????????????????????????????(1)

The width value of all thickness of sheet material 4 (highly) position that synchronization in same plane is measured carries out statistical analysis, be engraved in Breadth Maximum value, minimum widith value, mean breadth value and the maximum of measuring position sheet material, the position of minimum widith value in the time that this can being obtained, all width values are shown with image format on display 3, obtain the shape of sheet material 4 at this section.The speed of producing according to sheet material 4 (introducing from on-the-spot speed measuring instrument) is spliced into figure by the sheet material of continuous measurement 4 section configurations, obtains the limit section shape of sheet material 4.Situation of change according to analyzing sheet material 4 limit section shapes, can judge whether sheet material edge exists the size and shape of defect and defect.

After a board measure completes, the present invention can also provide the position of mean breadth value, Breadth Maximum value, minimum widith value and the place sheet material of monoblock sheet material.

Embodiment: the band steel production line of certain enterprise of take is example:

The thickness range of flat product: 6-150mm, width range: 300-800mm, band steel maximum left and right skew: 20mm.

Consider the measurement surplus, the composite measurement instrument parameter that this example is this Design of Production Line is:

Datum level distance: w 0=280mm;

Measurement mechanism 1 range measurement scope: the 300mm of every cover limit section; The maximum measurement category of width is 880mm; The center line angle of the optical centreline of full HD smear camera 101 and laser line generator 102 is 45 °.This example high definition face smear camera 101 adopts 1400 * 1024 industrial digital video camera, frame frequency 60fps, the field range of high definition face smear camera 101 is 300mm (sheet material width) * 180mm (sheet metal thickness direction), 2 laser line generators 102 are at a distance of 50mm, width measure precision 0.5mm.

Claims (1)

1. the width of a sheet material, limit section shape, edge fault measuring method, is characterized in that, comprises following step:
The first step, the user demarcates the measurement datum of limit section measurement mechanism;
The user sets datum level according to maximum changing range and the maximum of sheet material on the production line scope that swings of sheet material width on production line, and the measurement datum of two cover limit section measurement mechanisms is demarcated, and obtains reference position;
Second step, laser line generator irradiates tested sheet material thickness direction surface, forms the Ear Mucosa Treated by He Ne Laser Irradiation line of vertical direction;
Laser line generator irradiates tested sheet material, at the thickness direction formation Ear Mucosa Treated by He Ne Laser Irradiation line of tested side face of plate material;
The 3rd step, the change in location of the tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line that full HD smear camera high-speed capture moved, the image that full HD smear camera taken is sent to data collecting plate card;
The 4th step, data collecting plate card obtains the position of every bit on tested side face of plate material Ear Mucosa Treated by He Ne Laser Irradiation line, transfers to the measurement switch board;
The 5th step, measure switch board and adopt the optical triangulation method to measure the distance value of tested sheet material edge and reference position, obtains width, limit section shape, the edge fault of sheet material;
The optical triangulation method is specially: the measuring basis position of establishing limit section measurement mechanism is the O point, when having sheet material to pass through measuring position, Ear Mucosa Treated by He Ne Laser Irradiation is O ' point on sheet material, full HD smear camera photographs the variation of Ear Mucosa Treated by He Ne Laser Irradiation facula position, intelligentized data collecting plate card gathers O ' position signalling, process through image the exact position that obtains at O ' and send the measurement switch board, measure switch board and depart from the distance h of reference position through calculating the board measure point; The datum level that the two cover limit sections measurement mechanisms of installing in the sheet material bilateral symmetry are set apart from w 0the width value that is less than narrow boards material deducts the maximum magnitude that swing of sheet material on production line;
Suppose that the distance of measuring at the left side portion measurement mechanism in tested sheet material sustained height left-right symmetry position is h 1, the distance that right edge section measurement mechanism is measured is h 2, the width value of tested this height of sheet material is:
W=h 1+w 0+h 2????(1)
The width value of all thickness positions of sheet material that synchronization in same plane is measured carries out statistical analysis, be engraved in Breadth Maximum value, minimum widith value, mean breadth value and the maximum of measuring position sheet material, the position of minimum widith value while obtaining this, all width values are shown with image format on display, obtain the shape of sheet material at section; The speed of producing according to sheet material, be spliced into figure by the sheet material section configuration of continuous measurement, obtains the limit section shape of sheet material; Situation of change according to analyzing the sheet material edge shape, judge whether sheet material edge exists the size and shape of defect and defect.
CN 201110319521 2011-10-19 2011-10-19 Plate width, side shape and side defect measuring instrument and measuring method thereof CN102500627B (en)

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