CN105486691A - Device and method for detecting surface quality of steel plates and automatically positioning illumination angle - Google Patents

Device and method for detecting surface quality of steel plates and automatically positioning illumination angle Download PDF

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Publication number
CN105486691A
CN105486691A CN201410483659.7A CN201410483659A CN105486691A CN 105486691 A CN105486691 A CN 105486691A CN 201410483659 A CN201410483659 A CN 201410483659A CN 105486691 A CN105486691 A CN 105486691A
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China
Prior art keywords
angle
camera
line source
stepper motor
line
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CN201410483659.7A
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CN105486691B (en
Inventor
王靖震
高冰
宋宝宇
杨东晓
王军生
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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Abstract

The invention discloses a device and a method for detecting surface quality of steel plates and automatically positioning an illumination angle. The device comprises a bearing, stepping motors, a camera, a transmission shaft, a fixture, a line light source, a slide block, a base, a computer and a support frame consisting of an upright post, an upper transverse beam and a lower transverse beam, wherein two ends of the upper transverse beam and the lower transverse beam with the outer sides provided with the stepping motors are connected to a vertical slide block of the upright post; the camera is arranged on the inner side of the transverse beam; the transmission shaft fixed on the upper and lower transverse beams by virtue of the bearing is connected with the stepping motor; the transmission shaft is connected with the line light source; and the computer is connected with the stepping motor and the camera. When steel plates passes through the space between the two line light sources, a motion controller of the computer drives the stepping motors to rotate for a line light source illumination angle, line images of the steel plates are acquired by the camera, the line light source illumination angle value at the maximum line image gray value is automatically found, the most appropriate line light source illumination angle is judged, and the illumination angle is automatically positioned. According to the device disclosed by the invention, the maintenance workload can be reduced, the adjusting and positioning time is shortened, and the adjusting and positioning accuracy is improved.

Description

A kind of plate surface quality detects lighting angle automatic positioning equipment and method
Technical field
The invention belongs to plate quality detection field, particularly relate to a kind of line source irradiating angle automatic positioning equipment for plate surface quality detection and localization method.
Background technology
Adopt multiple stage camera to gather the image of quick moving steel plate on production line in plate surface quality detection system, and by carrying out identification steel plate defect to the further process of gathered image.In this process, the quality of image itself is very crucial to whole plate surface quality detection system.And illumination is fine or not, then it is the very important factor affecting surface of steel plate image Detection job.
What apply in plate surface quality detection system is line sweep camera and line source.Under the strip light of line source is irradiated, line sweep camera constantly to steel plate line, a line carry out image acquisition, and constantly accumulate along with the motion of steel plate and become image.Line sweep camera needs to ensure that the irradiating angle of line source is appropriate, and the striation making it irradiate just in time drops on the steel plate string diagram image position that line sweep camera gathers, and ensures that line sweep camera can collect high-quality picture rich in detail.
At present.In plate surface quality detection system, to adjustment and the location still employing method manually of the line source irradiating angle of camera, be a job of wasting time and energy.The adjustment of line source irradiating angle and carrying out with regard to needs when being positioned at the initial installation of plate surface quality detection system.The striation that simultaneously line source can be caused to irradiate due to slackness difference or the variation of steel plate falls undesirable irradiation position, therefore also needs when steel plate production line on-line operation to adjust line source irradiating angle and locate.In the practical application of plate surface quality detection system, due to reasons such as maintenance, the variation of steel plate slackness, location parameter variations, adjusting manually and locating of light source radiating angle needs not timing to carry out, belong to a part for plate surface quality detection system applicating maintenance work, need many manual labor.If during steel plate production line on-line operation, employing adjusts manually and locates also can exist certain potential safety hazard.
Summary of the invention
The invention provides a kind of plate surface quality and detect lighting angle automatic positioning equipment and localization method, its object is intended to eliminate the drawback of adjustment and position line light source radiating angle manually, reduce maintenance workload, improve adjustment, the accuracy of locating and Detection job.
For this reason, the solution that the present invention takes is:
A kind of plate surface quality detects lighting angle automatic positioning equipment, comprising: bearing 2, stepper motor 4, camera 5, transmission shaft 6, fixture 7, line source 8, slide block 9, base 10, computing machine 12 and bracing frame; Frame-type bracing frame is for be made up of two root posts 1, entablature 3 and sill 11, the top and the bottom of two root posts 1 are flexibly connected a slide block 9 respectively, the two ends of entablature 3 and sill 11 are connected on the top and the bottom slide block 9 of column 1, and column 1 lower end is fixed on base 10; Be fixed with stepper motor 4 respectively in the outside of entablature 3 and sill 11, inner side is connected to camera 5; Stepper motor 4 is connected with transmission shaft 6, and transmission shaft 6 two ends are fixed on entablature 3 and sill 11 by bearing 2, are connected with line source 8 in the inner side of two transmission shafts 6 respectively by fixture 7; Camera 5 connects computing machine 12 by network communication interface, and the motion controller of computing machine 12 is connected with stepper motor 4 by control signal wire.
Plate surface quality detects the method that lighting angle is located automatically, and its concrete grammar and process are:
The irradiating angle of definition wires light source 8 is for being 0 ° when line source 8 vertically shines to irradiating angle during steel plate 13, and line source 8 horizontal direction is shone to during camera 5 direction being 90 °, and irradiating angle mobility scale is between 0 ° ~ 90 °.
The irradiating angle calibrating line source 8 in advance often rotates the corresponding relation between the number of drive pulses of unit value and stepper motor 3, and calibration result data are preserved, so that the corresponding relation be in operation according to calibrated angle value and umber of pulse, converse the irradiating angle of current line source 8.
When steel plate 13 under the transport of roller 14 level from, when passing through between lower two line sources 8, on, lower two line sources 8 will be radiated in the upper and lower surface of steel plate 13 respectively, the camera 5 be located on lower and upper cross-member also gathers the string diagram picture of steel plate 13 upper and lower surface simultaneously, computing machine 12 receives the string diagram picture of camera 5 collection respectively by network communication, computing machine 12 motion controller exports pulsed drive stepper motor 4 and drives transmission shaft 6 and line source 8 to rotate, the process that line source 8 irradiating angle rotates from 0 ° to 90 °, the string diagram picture that continuous reception camera 5 gathers, the stepper motor 4 angle of rotation angle value that record converts by umber of pulse and comes and line source 8 illumination angle angle value, and record receives the gray-scale value of the string diagram picture that camera 5 gathers, illumination angle angle value corresponding to the maximum gradation value of string diagram picture is the optimum value of line source 8 irradiating angle, according to the optimum value of line source 8 irradiating angle obtained, irradiating angle is adjusted again by stepper motor 4 drive wire light source 8, realize the automatic location of irradiating angle.
The present invention adopts the industrial control computer Driving Stepping Motor that motion controller is housed to carry out the irradiating angle of rotational line light source, and industrial control computer gathers the string diagram picture on steel plate by line sweep camera simultaneously.By automatically search line sweep camera gather lines image intensity value maximum time the illumination angle angle value of line source, judge that the irradiating angle of most suitable line source realizes line source irradiating angle and automatically locates.Compared with mode manually, the present invention has following beneficial effect:
1, achieve automatic adjustment and the location of lighting angle, reduce maintenance workload, reduce labor intensity.
2, significantly can shorten the time of adjustment and location, improve operating efficiency.
3, effectively can improve the accuracy of adjustment and location, be conducive to improving Detection job.
4, eliminate potential safety hazard, testing staff's personal safety can be guaranteed.
Accompanying drawing explanation
Fig. 1 is that plate surface quality detects the main schematic diagram of lighting angle automatic positioning equipment;
Fig. 2 is that plate surface quality detects lighting angle automatic positioning equipment detected state side schematic diagram;
Fig. 3 is that plate surface quality detects lighting angle automatic positioning method process flow diagram.
In figure: column 1, bearing 2, entablature 3, stepper motor 4, camera 5, transmission shaft 6, fixture 7, line source 8, slide block 9, base 10, sill 11, computing machine 12, steel plate 13, roller 14.
Embodiment
As seen from Figure 1, plate surface quality detection lighting angle automatic positioning equipment of the present invention is mainly made up of bearing 2, stepper motor 4, camera 5, transmission shaft 6, fixture 7, line source 8, slide block 9, base 10, computing machine 12 and bracing frame.Bracing frame is a tower structure, be made up of column 1, entablature 3 and sill 11, column 1 is two, each one of left and right, a slide block 9 is flexibly connected respectively in the top of column 1 and bottom, the two ends of entablature 3 and sill 11 are connected on the top and the bottom slide block 9 of two root posts 1, and the lower end of column 1 is then fixed on base 10.Be fixed with a stepper motor 4 respectively in the outside of entablature 3 and sill 11, the inner side of entablature 3 and sill 11 is respectively connected with three cameras 5.Stepper motor 4 is connected with transmission shaft 6, and the two ends of transmission shaft 6 are fixed on entablature 3 and sill 11 respectively by bearing 2.The inner side of two transmission shafts 6 is connected with single line light source 8 respectively by fixture 7, and line source 8 can rotate with transmission shaft 6 under the driving of stepper motor 4.Camera 5 connects industrial control computer 12 by network communication interface, and the built-in motion controller of computing machine 12 is connected with stepper motor 4 by control signal wire, and passes through the rotation of control signal control step motor 4.
Plate surface quality of the present invention detects the method that lighting angle is located automatically, and its concrete grammar and process are:
First, the irradiating angle of definition wires light source 8: when line source 8 is vertically according to being 0 ° to irradiating angle during steel plate 13, line source 8 horizontal direction is shone to during camera 5 direction being 90 °, and therefore the mobility scale of irradiating angle is between 0 ° ~ 90 °.
Secondly, the irradiating angle calibrating line source 8 in advance often rotates the corresponding relation between the number of drive pulses of unit value and stepper motor 3, and calibration result data are preserved, so that the corresponding relation be in operation according to calibrated angle value and umber of pulse, converse the irradiating angle of current line source 8.
The control procedure that lighting angle is located automatically is: when steel plate 13 under the transport of roller 14 level from, when passing through between lower two line sources 8 (see Fig. 2), on, lower two line sources 8 will be radiated in the upper and lower surface of steel plate 13 respectively, 6 cameras 5 be located on entablature 3 and sill 11 gather the string diagram picture of steel plate 13 upper and lower surface simultaneously, the computing machine 12 be connected with camera 5 receives by network communication the string diagram picture that camera 5 gathers respectively, the motion controller of computing machine 12 exports pulsed drive stepper motor 4 and rotates, stepper motor 4 drives transmission shaft 6 to rotate together with line source 8, the process that line source 8 irradiating angle rotates from 0 ° to 90 °, the string diagram picture that continuous reception camera 5 gathers, the angle of rotation angle value of the stepper motor 4 that record converts by umber of pulse and comes and line source 8 illumination angle angle value, and record receives the gray-scale value of the string diagram picture that camera 5 gathers, illumination angle angle value corresponding to the maximum gradation value of string diagram picture is the optimum value of line source 8 irradiating angle, according to the optimum value of line source 8 irradiating angle obtained, computing machine 12 automatically control step motor 4 drive wire light source 8 adjusts irradiating angle, thus realize the automatic location of irradiating angle.Concrete control flow is shown in Fig. 3.

Claims (2)

1. a plate surface quality detects lighting angle automatic positioning equipment, it is characterized in that, comprising: bearing (2), stepper motor (4), camera (5), transmission shaft (6), fixture (7), line source (8), slide block (9), base (10), computing machine (12) and bracing frame; Frame-type bracing frame is made up of two root posts (1), entablature (3) and sill (11), the top and the bottom of two root posts (1) are flexibly connected a slide block (9) respectively, the two ends of entablature (3) and sill (11) are connected on the top and the bottom slide block (9) of column (1), and column (1) lower end is fixed on base (10); Be fixed with stepper motor (4) respectively in the outside of entablature (3) and sill (11), inner side is connected to camera (5); Stepper motor (4) is connected with transmission shaft (6), transmission shaft (6) two ends are fixed on entablature (3) and sill (11) by bearing (2), are connected with line source (8) in the inner side of two transmission shafts (6) respectively by fixture (7); Camera (5) connects computing machine (12) by network communication interface, and the motion controller of computing machine (12) is connected with stepper motor (4) by control signal wire.
2. application rights requires that described in 1, plate surface quality detects a method for lighting angle automatic positioning equipment, is characterized in that:
The irradiating angle of definition wires light source (8) for when line source (8) vertically photograph be 0 ° to irradiating angle time steel plate (13), line source (8) horizontal direction is shone to being 90 ° during camera (5) direction, and the mobility scale of irradiating angle is between 0 ° ~ 90 °;
The irradiating angle calibrating line source (8) in advance often rotates the corresponding relation between the number of drive pulses of unit value and stepper motor (3), and calibration result data are preserved, so that the corresponding relation be in operation according to calibrated angle value and umber of pulse, converses the irradiating angle of current line source (8);
When steel plate (13) under the transport of roller (14) level from upper, when passing through between lower two line sources (8), on, lower two line sources (8) will be radiated in the upper and lower surface of steel plate (13) respectively, the camera (5) be located on lower and upper cross-member also gathers the string diagram picture of steel plate (13) upper and lower surface simultaneously, computing machine (12) receives by network communication the string diagram picture that camera (5) gathers respectively, computing machine (12) motion controller exports pulsed drive stepper motor (4) and drives transmission shaft (6) and line source (8) to rotate, the process that line source (8) irradiating angle rotates from 0 ° to 90 °, the string diagram picture that continuous reception camera (5) gathers, stepper motor (4) the angle of rotation angle value that record converts by umber of pulse and comes and line source (8) illumination angle angle value, and record receives the gray-scale value of the string diagram picture that camera (5) gathers, illumination angle angle value corresponding to the maximum gradation value of string diagram picture is the optimum value of line source (8) irradiating angle, according to the optimum value of line source (8) irradiating angle obtained, again by stepper motor (4) drive wire light source (8) adjustment irradiating angle, realize the automatic location of irradiating angle.
CN201410483659.7A 2014-09-19 2014-09-19 A kind of plate surface quality detection lighting angle automatic positioning equipment and method Active CN105486691B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107561083A (en) * 2017-07-26 2018-01-09 天津大学 A kind of surface quality of steel detecting system
CN108398088A (en) * 2017-02-05 2018-08-14 鞍钢股份有限公司 A kind of strip width measure in vibration error bearing calibration

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201653917U (en) * 2010-02-23 2010-11-24 宝山钢铁股份有限公司 Device for acquiring defect images at surface of band steel
CN102818538A (en) * 2012-09-14 2012-12-12 洛阳兰迪玻璃机器股份有限公司 Detection system based on modulated glass thread structure laser image
CN202938985U (en) * 2012-11-19 2013-05-15 天津理工大学 Strip-shaped light source illuminance distribution detecting device based on linear array CCD camera
CN103185720A (en) * 2011-12-29 2013-07-03 宝山钢铁股份有限公司 Casting blank lower surface image detection device and detection method
CN204203117U (en) * 2014-09-19 2015-03-11 鞍钢股份有限公司 Plate surface quality detects lighting angle automatic positioning equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201653917U (en) * 2010-02-23 2010-11-24 宝山钢铁股份有限公司 Device for acquiring defect images at surface of band steel
CN103185720A (en) * 2011-12-29 2013-07-03 宝山钢铁股份有限公司 Casting blank lower surface image detection device and detection method
CN102818538A (en) * 2012-09-14 2012-12-12 洛阳兰迪玻璃机器股份有限公司 Detection system based on modulated glass thread structure laser image
CN202938985U (en) * 2012-11-19 2013-05-15 天津理工大学 Strip-shaped light source illuminance distribution detecting device based on linear array CCD camera
CN204203117U (en) * 2014-09-19 2015-03-11 鞍钢股份有限公司 Plate surface quality detects lighting angle automatic positioning equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108398088A (en) * 2017-02-05 2018-08-14 鞍钢股份有限公司 A kind of strip width measure in vibration error bearing calibration
CN107561083A (en) * 2017-07-26 2018-01-09 天津大学 A kind of surface quality of steel detecting system

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