CN101062529A - Weld seam appearance, fused bath and seam near-infrared vision integral sensing checkout gear - Google Patents
Weld seam appearance, fused bath and seam near-infrared vision integral sensing checkout gear Download PDFInfo
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- CN101062529A CN101062529A CN 200610039859 CN200610039859A CN101062529A CN 101062529 A CN101062529 A CN 101062529A CN 200610039859 CN200610039859 CN 200610039859 CN 200610039859 A CN200610039859 A CN 200610039859A CN 101062529 A CN101062529 A CN 101062529A
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Abstract
The invention relates to a welding seam appearance, fuse pool and the seam close to visual integration sensing test device, comprising a shell and the blocking electric arc plate, integrating the close infrared CCD sensor, big focus distance camera, close infrared narrow filtering system and the close infrared laser set inside the screen, the said close infrared narrow filter system shaft line forming into an included angle of 15-20degree, the close infrared laser emitting center being equal in height with the big focus distance lens, with isolation plate between the close infrared laser and the big focus lens and narrow filtering system, with the said close infrared laser and the close infrared CCD sensor connected to the controller. It can send messages like sense sampling fusion appearance, fuse pool and access slope visual information, realizing the inspection of sensing device.
Description
One, technical field
The invention belongs to the technology of arc welding process, mass sensitivity detection and control; particularly a kind of weld appearance, molten bath and seam near-infrared vision integral sensing detection device, it is applicable to the weld seam and the molten bath of metals such as copper, steel and aluminium and is applicable to spray transfer and short circuiting transfer gas metal-arc welding, twin-wire melting pole gas shielded welding, gas tungstun arc welding process and mass sensitivity detection.
Two, background technology
For intelligent welding technology field,, adopt the CCD sensing to gather molten bath visual pattern sensing technology, based on the existing researchs such as closed loop pool width control technology of visual sensing based on the seam tracking technique of visual sensing.But, " false image elimination " technology during molten bath and seam visual pattern sensing are gathered, the problems such as sensing acquisition technique of quality information identification in the visual pattern of molten bath and extractive technique, mariages gas shielded arc welding molten bath visual information do not solve.Weld appearance detects and still adopts the artificial visual inspection, or adopts measurer to detect, and weld appearance near-infrared sensing detection technology does not solve.And no matter be seam sensing detection, tracking control or molten bath visual sensing quality control, all can only work independently, it is one that sensing that neither one is unified and computing technology detect molten bath visual pattern, seam tracking and outward appearance molten.
Three, summary of the invention
The object of the present invention is to provide and a kind ofly can detect process and quality informations such as bead contour size, blemish, pool width, melting pool shape, pool depth, molten pool metal and scum silica frost flow regime, seam groove physical dimension, and can control weld appearance, molten bath and the seam near-infrared vision integral sensing detection device of welding quality automatically.
The technical solution that realizes the object of the invention is: a kind of weld appearance, molten bath and seam near-infrared vision integral sensing detection device, comprise housing and the retaining arc plate that stops the electric arc arc light that is connected with this housing, with the Near Infrared CCD sensor, big focal length lens, near-infrared narrow-band-filter system and near infrared laser are arranged in the housing of this shielding and become one, be to set gradually big focal length lens and near-infrared narrow-band-filter system on the axis of described Near Infrared CCD sensor, the axis of this near-infrared narrow-band-filter system becomes 15-20 ° of angle with the axis of near infrared laser, the Laser emission center of this near infrared laser is contour with the center of big focal length lens, and between this near infrared laser and big focal length lens and near-infrared narrow-band-filter system dividing plate is set; Described near infrared laser is connected with the controller that can carry out the processing of visual information image with the Near Infrared CCD sensor.
The wavelength of the near infrared laser of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device is 980nm.
In weld appearance of the present invention, molten bath and the seam near-infrared vision integral sensing detection device, on the housing in near-infrared narrow-band-filter system dead ahead, protective cover is set.
Weld appearance of the present invention, in molten bath and the seam near-infrared vision integral sensing detection device, near-infrared narrow-band-filter system and the big coaxial installation of focal length lens, and be arranged on shielding and be fixed into optical filtering-lens assembly in the stationary magazine creel, promptly before described big focal length lens, set gradually the center optical filter of near-infrared narrow-band-filter system, narrow band pass filter and neutral light damping plate, this center optical filter, narrow band pass filter and neutral light damping plate are parallel to each other and be successively set on the stationary magazine creel, between described center optical filter and the narrow band pass filter and the depth of parallelism between narrow band pass filter and the neutral light damping plate be respectively 0.03～0.08mm.
In weld appearance of the present invention, molten bath and the seam near-infrared vision integral sensing detection device, the neutral light damping plate of a slice is set between narrow band pass filter and neutral light damping plate again.
The center optical filter of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device and the centre wavelength of narrow band pass filter are 900～1100nm, and half-band width is 1～4nm.
The light extinction rate of the neutral light damping plate of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device is 0.05～0.15%.
The black layer that the inner walls of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device and baffle surface setting are handled by the aluminium alloy electric chemical stain, the inwall setting of stationary magazine creel is by the black layer of the painted processing of oxidized aluminum alloy.
The focal length of the big focal length lens of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device is 16～25mm.
The housing of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device and stationary magazine creel are the aluminum shielding.
The present invention compared with prior art, its remarkable advantage is: (1) adopts near infrared detection molten bath, seam and weld appearance moulding, and the crater image that sensing collects is clear, and the acquisition precision height can reach 0.15mm; (2) sensing is gathered weld appearance, molten bath and seam groove visual information simultaneously, and function is strong, acquisition range is wide, is that the multifunctional all welding detects sensing device; (3) but sensing is gathered PMIG, mariages PMIG, deposited weldering, MIG, MAG, TIG, PTITG and process and quality informations such as plasma arc welding (PAW), built-up welding, the non-constant width of accommodation; (4) adopted anti-ghost image design, also can carry out sensing and control the welding process that arc light is very strong; (5) weld seam, molten bath and the joint of multiple metal materials such as energy sensing detection stainless steel, copper, steel alloy, carbon steel, aluminium, magnesium, titanium, composite, the sensing steady quality.
Four, description of drawings
Fig. 1 is the structural representation of weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device.
Fig. 2 is the structural representation of optical filtering-lens assembly of the present invention.
Fig. 3 is the arc welding robot intelligence welding system configuration schematic diagram that the present invention is based on visual sensing.
Fig. 4 is the flow chart of special-purpose computer visual information image processing software of the present invention.
Five, the specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
In conjunction with Fig. 1 and Fig. 2, weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device, comprise housing 1 that is arranged on the installing rack 3 and the retaining arc plate 8 that stops the electric arc arc light that is connected with this housing 1, with Near Infrared CCD sensor 4, focal length is the big focal length lens 5 of 16～25mm, near-infrared narrow-band-filter system 6 and near infrared laser 10 are arranged in the housing 1 of aluminum shielding and become one, be describedly Near Infrared CCD sensor 4 to be installed on the housing 1 by holder 2, set gradually big focal length lens 5 and near-infrared narrow-band-filter system 6 on the axis of this Near Infrared CCD sensor 4, the axis of this near-infrared narrow-band-filter system 6 becomes 15-20 ° of angle with the axis of near infrared laser 10, the Laser emission center of this near infrared laser 10 is contour with the center of big focal length lens 5, and between this near infrared laser 10 and big focal length lens 5 and near-infrared narrow-band-filter system 6, dividing plate 9 is set, on the housing 1 in near-infrared narrow-band-filter system 6 dead aheads, be provided with and can protect near-infrared narrow-band-filter system 6 and protective cover 7 that can printing opacity; Described near infrared laser 10 is connected with the controller 11 that can carry out the processing of visual information image by shielded signal line 15 with Near Infrared CCD sensor 4.Wherein, described near-infrared narrow-band-filter system 6 and big focal length lens 5 coaxial installations, and be arranged in the aluminum shielding stationary magazine creel 6-2 and be fixed into optical filtering-lens assembly, promptly before described big focal length lens 5, set gradually the center optical filter 6-3 of near-infrared narrow-band-filter system 6, narrow band pass filter 6-1 and neutral light damping plate 6-4, this center optical filter 6-3, narrow band pass filter 6-1 and neutral light damping plate 6-4 are parallel to each other and be successively set on the stationary magazine creel 6-2, between described center optical filter 6-3 and the narrow band pass filter 6-1 and the depth of parallelism between narrow band pass filter 6-1 and the neutral light damping plate 6-4 be respectively 0.03～0.08mm.Adopted the near-infrared sensing technology, utilize the arrowband and end composite filter, effectively eliminated the interference of ultraviolet light, visible light etc. by near-infrared narrow-band-filter system 6, promptly more effectively eliminated the interference of arc light, can sensing collect molten bath, seam visual pattern clearly, just the wavelength of near infrared laser 10 is 980nm, and the centre wavelength of center optical filter 6-3 and narrow band pass filter 6-1 is 900～1100nm, and half-band width is 1～4nm.The light extinction rate of neutral light damping plate 6-4 is 0.05～0.15%.
Weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device have adopted special anti-" ghost image " design, promptly at first on the surface of the inwall and the dividing plate 9 of housing 1, make inner surface form stable " black layer " by " aluminium alloy electric chemical stain processing ", reflection, the radiation dispersion light of molten bath, seam and weld appearance should " black layer " fully be absorbed, do not enter CCD, prevented the generation of " ghost image ".Secondly, inwall at stationary magazine creel 6-2 makes inner surface form stable " black layer " by " the painted processing of oxidized aluminum alloy ", the reflection of molten bath, seam and weld appearance, radiation dispersion light should " black layer " fully be absorbed, and do not enter CCD, have prevented the generation of " ghost image ".Once more, strict center optical filter 6-3, narrow band pass filter 6-1 and the neutral light damping plate 6-4 quantity that controls in the near-infrared narrow-band-filter system 6, total quantity is no more than the 3-4 sheet at most, when being 4, the neutral light damping plate of a slice is set between narrow band pass filter 6-1 and neutral light damping plate 6-4 promptly again.Be strictness control assembly precision, each filter (subtracting) mating plate keeping parallelism, its depth of parallelism is 0.03-0.08mm, can more effectively prevent the generation of veiling glare.
In conjunction with Fig. 3, weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device 100 are installed on the welding gun rifle body 13, and its sidewall is equipped with inclination rotary sleeve 14, tilt rotation rotary sleeve 14 on rifle body 13, and adopt the assembling of pin location.This rifle body 13 is installed in the robot 18 that connects a robot controller 12.When the molten bath vision to workpiece 17 detects control, welding gun is preceding, weld appearance, molten bath and seam near-infrared vision integral sensing detection device 100 after, detect molten bath visual pattern and weld appearance from the molten bath afterbody, detect the seam groove and when motion tracking, with weld appearance, molten bath and seam near-infrared vision integral sensing detection device 100 wrapping gun axle Rotate 180s ° both can realize that seam was followed the tracks of and the detection sensing of groove information, when carrying out weld appearance moulding detection, this weld appearance, molten bath and seam near-infrared vision integral sensing detection device 100 all can before or after welding gun.A set of shield holding wire 15 is drawn in this weld appearance, molten bath and seam near-infrared vision integral sensing detection device 100 ends, image card joint in the controller 11 of shielded signal line 15 and weld appearance, molten bath and seam near-infrared vision integral sensing detection device 100 links to each other, and capture card inserts in the controller computer PC groove.Controller 11 1 ends can connect display 16, can also connect robot controller 12.
In conjunction with Fig. 4, the signal that weld appearance of the present invention, molten bath and seam near-infrared vision integral sensing detection device 100 collect imports the image pick-up card of controller 11 into by shielded signal line 15, enter computer system again, special-purpose visual information image processing software carries out Computer Image Processing to the signal of sensing and draws relevant information.This special-purpose computer vision frame process software has designed Computer Image Processing, physical dimension and deviation calculating, process and qualitative character identification dedicated processes system, realized that integrated sensing detects and quality control, can finish the sensing detection of weld appearance compact dimensions and defects detection, molten bath visual information sensing and qualitative character identification, seam tracking sensing and groove information.If detect weld appearance molding parameter and mass parameter, can obtain molding parameters such as weld width, width are poor, reinforcement as calculated, handle information such as can not filled up, undercut, overlap, surface pores, surperficial slag inclusion, surface forming are irregular through image; If gather molten bath geometric parameter and visual quality characteristic information, can obtain the scum silica frost form through the image processing, pool width, molten bath length, the molten bath form, the molten bath flowable state, information such as molten bath clarity, these information can realize that record is as prediction of quality, also can further handle and obtain as width by the visual information image processing software, scum silica frost morphological feature and quantity, indication informations such as quality informations such as the special parameter in molten bath also convert the adjustment welding current to, voltage, weldering speed, the welding gun height, signals such as welding gun inclination angle, and pass to robot controller 12 or weld controller automatically and carry out online adjustment; If gather seam groove signal, visual information image processing software processing through special use can obtain welding gun and seam left-right deviation, go up characteristic informations such as lower deviation, bevel angle, gap, root face, joint categories, this signal is passed to robot controller 12 or is welded controller automatically and carry out online adjustment welding torch position, and the groove signal that processing simultaneously obtains can be passed to robot 18 and carry out the process planning design or adjust welding variables.Send into welding system in the robot controller 12 through the control information that " special-purpose computer image processing software " operation obtains, image such as the molten bath qualitative character of acquisition, apparent size, groove joint parameter and digital information show or deposit the appointed area at display 16.In a word, by weld appearance, molten bath and seam near-infrared vision integral sensing detection device 100 with the controller 11 of " special-purpose computer image processing software " is housed, can realize that the integrated sensing of " weld appearance, molten bath visual information, seam groove " detects and AUTOMATIC QUALITY CONTROL.But weld appearance of the present invention, molten bath and the inspection of seam near-infrared vision integral sensing detection device 100 sensings PMIG, mariages PMIG, deposited weldering, MIG, MAG, TIG, PTITG and process and quality informations such as plasma arc welding (PAW), built-up welding, weld seam, molten bath and the joint of multiple metal materials such as energy sensing detection copper, stainless steel, carbon steel, steel alloy, aluminium, magnesium, titanium, composite.
Claims (10)
1, a kind of weld appearance, molten bath and seam near-infrared vision integral sensing detection device, comprise housing [1] and the retaining arc plate [8] that stops the electric arc arc light that is connected with this housing [1], it is characterized in that: with Near Infrared CCD sensor [4], big focal length lens [5], near-infrared narrow-band-filter system [6] and near infrared laser [10] are arranged in the housing [1] of shielding and become one, be to set gradually big focal length lens [5] and near-infrared narrow-band-filter system [6] on the axis of described Near Infrared CCD sensor [4], the axis of this near-infrared narrow-band-filter system [6] becomes 15-20 ° of angle with the axis of near infrared laser [10], the Laser emission center of this near infrared laser [10] is contour with the center of big focal length lens [5], and between this near infrared laser [10] and big focal length lens [5] and near-infrared narrow-band-filter system [6] dividing plate [9] is set; Described near infrared laser [10] is connected with the controller [11] that can carry out the processing of visual information image with Near Infrared CCD sensor [4].
2, weld appearance according to claim 1, molten bath and seam near-infrared vision integral sensing detection device, it is characterized in that: the wavelength of near infrared laser [10] is 980nm.
3, weld appearance according to claim 1, molten bath and seam near-infrared vision integral sensing detection device is characterized in that: on the housing [1] in near-infrared narrow-band-filter system [6] dead ahead protective cover [7] is set.
4, weld appearance according to claim 1, molten bath and seam near-infrared vision integral sensing detection device, it is characterized in that: near-infrared narrow-band-filter system [6] and the big coaxial installation of focal length lens [5], and be arranged in shielding stationary magazine creel [6-2] and be fixed into optical filtering-lens assembly, promptly at the preceding center optical filter [6-3] that sets gradually near-infrared narrow-band-filter system [6] of described big focal length lens [5], narrow band pass filter [6-1] and neutral light damping plate [6-4], this center optical filter [6-3], narrow band pass filter [6-1] and neutral light damping plate [6-4] are parallel to each other and be successively set on the stationary magazine creel [6-2], between described center optical filter [6-3] and the narrow band pass filter [6-1] and the depth of parallelism between narrow band pass filter [6-1] and the neutral light damping plate [6-4] be respectively 0.03～0.08mm.
5, weld appearance according to claim 4, molten bath and seam near-infrared vision integral sensing detection device is characterized in that: the neutral light damping plate of a slice is set between narrow band pass filter [6-1] and neutral light damping plate [6-4] again.
6, weld appearance according to claim 4, molten bath and seam near-infrared vision integral sensing detection device is characterized in that: the centre wavelength of center optical filter [6-3] and narrow band pass filter [6-1] is 900～1100nm, and half-band width is 1～4nm.
7, weld appearance according to claim 4, molten bath and seam near-infrared vision integral sensing detection device, it is characterized in that: the light extinction rate of neutral light damping plate [6-4] is 0.05～0.15%.
8, according to claim 1 or 4 described weld appearances, molten bath and seam near-infrared vision integral sensing detection device, it is characterized in that: the surface of the inwall of housing [1] and dividing plate [9] is provided with the black layer of being handled by the aluminium alloy electric chemical stain, and the inwall setting of stationary magazine creel [6-2] is by the black layer of the painted processing of oxidized aluminum alloy.
9, according to claim 1 or 4 described weld appearances, molten bath and seam near-infrared vision integral sensing detection device, it is characterized in that: the focal length of big focal length lens [5] is 16～25mm.
10, according to claim 1 or 4 described weld appearances, molten bath and seam near-infrared vision integral sensing detection device, it is characterized in that: housing [1] and stationary magazine creel [6-2] are the aluminum shielding.
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| CNB2006100398599A CN100457353C (en) | 2006-04-25 | 2006-04-25 | Weld seam appearance, fused bath and seam near-infrared vision integral sensing checkout gear |
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Assignee: JIANGSU SHUANGSHUANG HI-TECH Co.,Ltd. Assignor: Nanjing University of Science and Technology Contract record no.: 2012320000316 Denomination of invention: Weld seam appearance, fused bath and seam near-infrared vision integral sensing checkout gear Granted publication date: 20090204 License type: Exclusive License Open date: 20071031 Record date: 20120327 |
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