CN208026651U - Plate of material shape defect detecting system based on multichannel light source - Google Patents
Plate of material shape defect detecting system based on multichannel light source Download PDFInfo
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- CN208026651U CN208026651U CN201820375157.6U CN201820375157U CN208026651U CN 208026651 U CN208026651 U CN 208026651U CN 201820375157 U CN201820375157 U CN 201820375157U CN 208026651 U CN208026651 U CN 208026651U
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Abstract
The utility model discloses a kind of plate of material shape defect detecting system based on multichannel light source, including：Imaging device；Lighting device, the lighting source for providing spatial channel, structure channel and spectrum channel transformation, is located within the visual angle of imaging device between the lighting area of lighting device；Support device, for installing support imaging device and lighting device；Transmission device, for so that generating relative movement between measured material and imaging device and/or lighting device；Controller connects imaging device and lighting device, and continuous scanning is carried out when measured material is illuminated to obtain each channel imaging data for controlling three-dimensional switching of the lighting device in each interchannel and channel, and for controlling imaging device；Image processing apparatus is communicated to connect with controller and imaging device, for generating control instruction to controller and receiving the image data of imaging device generation.
Description
Technical field
The utility model is related to plate of material shape defects detection fields, particularly, are related to a kind of material based on multichannel light source
Flitch shape defect detecting system.
Background technology
The common flatness defect of material generally has camber, shape wave, wooden dipper bent or side sway, concave point, salient point, scuffing, for saturating
The flatness defect of bright material further includes viscous tin, rubble etc..Existing defect detecting system, including laser, camera, computer
And image processing apparatus, tested material such as glass are positioned on article carrying platform, camera is located above article carrying platform, camera
It is connected with computer, built-in computer image processing apparatus.Laser is located at the side of tested glass, and the light beam sent out is through glass
It is projected with certain light path after glass, computer control video camera shoots glass front, shoots the image of acquisition by computer
It acquires and is identified by image processing apparatus.
Existing defect detecting system since laser is fixed on, fix by tested material side, position, and laser sheet
The light-source structure and spectrum that body provides are relatively simple, can only roughly be detected to flatness defect, can not be accurately obtained plate shape and lack
Sunken length, width, area etc. cause recall rate and discrimination very low, and existing defect detecting system can not be known simultaneously
Not large-scale flatness defect and tiny flaw.
Utility model content
The utility model provides a kind of plate of material shape defect detecting system based on multichannel light source, existing to solve
Defects detection position fixes, light-source structure and spectrum is relatively simple leads to the skill that accuracy of detection is limited, recall rate and discrimination are low
Art problem.
The technical solution adopted in the utility model is as follows：
The utility model provides a kind of plate of material shape defect detecting system based on multichannel light source, for being measured and monitored the growth of standing timber
Material carries out flatness defect detection under the lighting source that multichannel converts, and detecting system includes：Imaging device, for being measured and monitored the growth of standing timber
Material carries out image scanning；Lighting device, for providing the photograph that spatial channel, structure channel and spectrum channel convert to measured material
Mingguang City source is located within the visual angle of imaging device between the lighting area of lighting device；Support device, for installing support imaging device
And lighting device；Transmission device, for so that generating relative movement between measured material and imaging device and/or lighting device；Control
Device processed connects imaging device and lighting device, switches for controlling solid of the lighting device in each interchannel and channel, and
Continuous scanning is carried out to obtain each channel imaging data when measured material is illuminated for controlling imaging device；Image procossing fills
It sets, is communicated to connect with controller and imaging device, for generating control instruction to controller and receiving the figure of imaging device generation
As data.
Further, lighting device includes lighting source and angle rotating device, and lighting source passes through angle rotating device
It is connected in support device；Angle rotating device connects controller, and controls illumination light under the order-driven generated by controller
Realize the transformation in spatial channel in source.
Further, angle rotating device is at least one in arm cyclone, beam cyclone, cradle head device, spin device
Kind.
Optionally, arm cyclone includes stepper motor, rotating mechanism, stepper motor be mounted in support device and with rotation
Mechanism is connected, and lighting source is connected by beam base with the rotating arm of rotating mechanism, and stepper motor drives in the instruction of controller
Dynamic lower drive rotating arm rotation makes lighting source incident direction and measured material plane be in required angle.
Optionally, beam cyclone includes stepper motor, rotating mechanism, stepper motor be mounted in support device and with rotation
Mechanism is connected, and lighting source is connected by beam base with rotating mechanism, and stepper motor drives under the order-driven of controller
Rotating mechanism rotation is to drive beam base rotation to make lighting source incident direction with measured material plane in required angle
Degree.
Optionally, cradle head device includes the holder being mounted in support device, and lighting source is directly mounted on holder, cloud
Platform rotates that lighting source is driven to turn to incident direction with measured material plane in required under the order-driven of controller
The angle wanted.
Optionally, spin device includes stepper motor, rotating mechanism, stepper motor be mounted in support device and with rotation
Mechanism is connected, and lighting source is connected with rotating mechanism, and stepper motor drives rotating mechanism to rotate under the order-driven of controller
To drive lighting source to spin as axis using the central axes of lighting source.
Further, lighting device includes the soft structure illuminating apparatus and/or rigid structure for providing various structures light
Illuminating apparatus；Various structures light include structure light, line-structured light, scatterplot structure light, area-structure light, line grating structure light,
At least one of lattice grating structured light.
Optionally, rigid structure illuminating apparatus includes LED light source matrix, and each LED light source corresponds to a grid；Controller
LED light source matrix is connected, for controlling LED light source matrix timesharing switching illumination to realize transformation of the lighting source in structure channel
And the structure light needed for being formed.
Optionally, the Grating Film or raster grid for being used to form various structures light are provided with before lighting device；Or it is measured and monitored the growth of standing timber
Material surface is provided with the Grating Film or raster grid for being used to form various structures light.
Optionally, lighting device includes the lighting source for providing multiple spectrum transformation, and controller connects lighting source,
Transformation for controlling lighting source spectrum channel.
Preferably, imaging device is connected to by angle rotating device in support device；Angle rotating device connection control
Device, and by controller generate order-driven under control imaging device realize spatial alternation make imaging device realize multi-angle at
Picture；Angle rotating device is at least one of arm cyclone, beam cyclone, cradle head device.
Plate of material shape defect detecting system of the utility model based on multichannel light source is logical in space by lighting device
Road, structure channel and spectrum channel change are changed so that imaging device can capture the illumination light that measured material is converted in multichannel
Multichannel image under source is conducive to the subsequent flatness defect detection of image processing apparatus and is lacked with obtaining detected transparent material plate shape
Information is fallen into, such as camber, shape wave, wooden dipper be bent or side sway, concave point, salient point, since the image of imaging device capture is more comprehensively and complete
It is whole, thus image processing apparatus subsequently can more accurately detect flatness defect, to greatly improve plate shape in measured material
The recall rate and discrimination of defect, also fundamentally overcome existing defect detecting system identify at the same time large-scale flatness defect and
The deficiency of tiny flaw.
Other than objects, features and advantages described above, the utility model also has other purposes, feature and excellent
Point.Below with reference to accompanying drawings, the utility model is described in further detail.
Description of the drawings
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model
Illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.In attached drawing
In：
Fig. 1 is the structure of the plate of material shape defect detecting system based on multichannel light source of the preferred embodiment in the utility model
Schematic diagram；
Fig. 2 is the schematic diagram that zero defect is imaged in the preferred embodiment in the utility model measured material；
Fig. 3 is the schematic diagram of the preferred embodiment in the utility model measured material protrusions defect imaging；
Fig. 4 is the schematic diagram of the preferred embodiment in the utility model triangulation calculation.
Drawing reference numeral explanation：
1, camera；2, camera lens；3, lighting source；4, imaging device data telecommunication line cable；5, the controller communications cable；6, it controls
Device processed；7, image processing apparatus；8, measured material；9, light；A, the intersection point of incident ray and flatness defect certain point；O, incidence
The intersection point of light extended line and transparent material plane；The upright projection of A ', A in transparent material plane；θ, incident ray and quilt
The angle for 8 planes of material of measuring and monitoring the growth of standing timber.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
The preferred embodiment of the utility model provides a kind of plate of material shape defect detecting system based on multichannel light source,
It can be used for carrying out flatness defect detection to tested transparent material or non-transparent material, be measured and monitored the growth of standing timber by imaging device capture
Expect that the multichannel in lighting source becomes the multichannel image changed, through the methods of soft light grating image defect recognition to image analysis
After processing, detected transparent material flatness defect information is obtained, such as camber, shape wave, wooden dipper song or side sway, concave point, salient point, makes plate shape
The length of defect, width, area are more accurate, to greatly improve the recall rate and discrimination of flatness defect in measured material,
Also it fundamentally overcomes current defect system pair while identifying the deficiency of large-scale flatness defect and tiny flaw.
In the preferred embodiment of the utility model, the plate of material shape defect detecting system based on multichannel light source includes：
Imaging device, for carrying out image scanning to measured material；
Lighting device, for providing the lighting source that spatial channel, structure channel and spectrum channel convert to measured material,
Between the lighting area of lighting device within the visual angle of imaging device；
Support device, for installing support imaging device and lighting device；
Transmission device, for so that generating relative movement between measured material and imaging device and/or lighting device；
Controller connects imaging device and lighting device, vertical in each interchannel and channel for controlling lighting device
Body switches, and carries out continuous scanning when measured material is illuminated to obtain each channel imaging number for controlling imaging device
According to；
Image processing apparatus is communicated to connect with controller and imaging device, for generating control instruction to controller and connecing
Receive the image data that imaging device generates.
Further, lighting device includes lighting source and angle rotating device, and lighting source passes through angle rotating device
It is connected in support device；Angle rotating device connects controller, and controls illumination light under the order-driven generated by controller
Realize the transformation in spatial channel in source.
The angle rotating device of the utility model makes carry out angular transformation of the lighting device from spatial channel, is filled for imaging
It sets and more scene environments is provided.Position according to turning effort is different, and the angle rotating device of the utility model can be divided into arm spinning
It sets, beam cyclone, cradle head device, spin device.
Optionally, arm cyclone includes stepper motor, rotating mechanism, stepper motor be mounted on the column of support device and
It is connected with rotating mechanism, lighting source is connected by beam base with the rotating arm of rotating mechanism, and stepper motor is in controller
Rotating arm rotation is driven to make lighting source incident direction with measured material plane in required angle under order-driven.
Optionally, beam cyclone includes stepper motor, rotating mechanism, stepper motor be mounted on the column of support device and
It is connected with rotating mechanism, lighting source is connected by beam base with rotating mechanism, order-driven of the stepper motor in controller
Lower drive rotating mechanism rotation is to drive beam base rotation to make lighting source incident direction with measured material plane in required
The angle wanted.
Optionally, cradle head device includes the holder being mounted in support device, and lighting source is directly mounted on holder, cloud
Platform rotates that lighting source is driven to turn to incident direction with measured material plane in required under the order-driven of controller
The angle wanted.Cradle head device can also be achieved horizontal rotation and vertical rotary.
Optionally, spin device includes stepper motor, rotating mechanism, stepper motor be mounted in support device and with rotation
Mechanism is connected, and lighting source is connected with rotating mechanism, and stepper motor drives rotating mechanism to rotate under the order-driven of controller
To drive lighting source to spin as axis using the center line of lighting source.The rotating mechanism of spin device directly acts on illumination
Light source makes lighting source spin as axis using the central axes of light source, presents and changes various light scene.
In the utility model, the angle rotating device that is converted in spatial channel for realizing lighting source by one of the above,
Or several rotating devices are constituted, and are mutually cooperateed with, and realize multi-angle, more scene lightings, are met measured material and are illuminated to any angle
Requirement.For lighting source under the driving of angle conversion device, linear structure light can be oblique for transverse direction, longitudinal direction, any angle
Illumination, linear structure light can be distorted because of measured material surface irregularity.Imaging device captures more scene images, figure
As processing unit analysis image in transverse direction, longitudinal direction, any angle distorted image, to identify transparent material it is lateral, longitudinal, times
Meaning angle flatness defect, and corresponding length, width and area in conjunction with triangulation calculation, or even calculate the recess depth of flatness defect
Degree or height of projection.
In the preferred embodiment of the utility model, detecting system further includes the angle rotation for allowing imaging device to realize spatial alternation
Rotary device makes imaging device realize multi-angle imaging.Similarly, different according to the position of turning effort, can be divided into arm cyclone,
Beam cyclone, cradle head device.Arm cyclone includes stepper motor, rotating mechanism etc., and stepper motor is mounted on the vertical of support device
It is connected on column and with rotating mechanism, imaging device is mounted in beam base, the rotating arm at beam base both ends and rotating mechanism
It is connected, under the control of the controller, so that imaging device is focused center line with transparent material plane in required by rotating rotating arm
Angle.Beam cyclone includes stepper motor, rotating mechanism etc., and stepper motor is mounted on column, is connected with rotating mechanism, is imaged
Device is mounted in beam base, and beam base both ends are directly connected with rotating mechanism, by the crossbeam bottom for rotating imaging device
It is in required angle that seat, which makes imaging device focus center line with transparent material plane,.Cradle head device refers to imaging device and is directly installed on cloud
On platform, so that imaging device is focused center line with transparent material plane by cloud platform rotation and be in required angle, can also be achieved horizontal rotation
Turn and vertical rotary.The angle rotating device of imaging device is made of one of the above or several rotating devices, with lighting device
Angle rotating device cooperates with, and meets measured material under more light scenes, various visual angles imaging requirements, particularly with complex geometry shape
Often there is scanning dead angle, be not transformed into image angle degree, possibly can not get the positive face of light projection surface in the transparent material of shape
Picture.
Further, lighting device includes the soft structure illuminating apparatus and/or rigid structure for providing various structures light
Illuminating apparatus.Various structures light include structure light, line-structured light, scatterplot structure light, area-structure light, line grating structure light,
At least one of other forms structure light such as lattice grating structured light.
The lighting device of the utility model is used to provide various structures optical illumination for measured material, makes lighting device from structure
Channel angle is converted, to adapt to the requirement that image scene converts structure light.Lighting device is according to structure light realization method
Soft structure illuminating apparatus and rigid structure illuminating apparatus can be divided into.
The soft structure illuminating apparatus first passes through the shape of software definition structure light, projects and is measured and monitored the growth of standing timber through lighting device
On material, required structure light is obtained, enters imaging device through light paths such as reflection, transmission, refraction, scatterings, such as structure light, line
Structure light, scatterplot structure light, area-structure light, line grating structure light, lattice grating structured light etc..The rigid structure illuminating apparatus packet
LED light source matrix is included, controller connects LED light source matrix, and control LED light source matrix timesharing switching illumination is to realize lighting source
Required structure light is formed in the transformation of structure channel.The utility model preferably uses soft structure illuminating apparatus.Soft structure
The transformation pattern of the definable structure light of illuminating apparatus, size are more flexible, and definable range is wider, and transformation and debugging cycle
Short, capable of well meeting imaging device, continuously online scanning needs can guarantee defects detection without being bound by single source size
Precision, improve recall rate and discrimination, and upgrade it is convenient.
The light source illumination of structure channel transformation is realized using rigid structure illuminating apparatus.Rigid structure illuminating apparatus is by multiple
LED light source matrix is constituted, and each LED light source corresponds to a grid, equally first passes through structure light shape needed for software definition, then
The timesharing switching illumination of corresponding LED light source is controlled to realize required structure light by controller, is projected on measured material, is passed through
The light paths such as reflection, transmission, refraction, scattering enter imaging device, such as structure light, line-structured light, scatterplot structure light, face structure
Light, line grating structure light, lattice grating structured light etc..
For transparent material, when using rigid structure illuminating apparatus, imaging device can capture homalographic raster grid image,
By four step phase-shifting methods, the distortion of single raster grid is analyzed, to identify the flatness defect of transparent material, and corresponding length,
Width and area in conjunction with triangulation calculation, or even obtain the cup depth or height of projection of flatness defect.
Certainly, in other embodiments, structure light can also be in the preposition Grating Film of lighting device or raster grid, or is being tested
Material surface sets Grating Film or raster grid is realized.For transparent material, can Grating Film be set before the lighting source of lighting device
Or raster grid, or Grating Film or raster grid realization are set on measured material surface.It, can be in lighting device for non-transparent material
Grating Film is set before lighting source or raster grid is realized.
Further, lighting device includes the lighting source for providing multiple spectrum transformation, and controller connects illumination light
Source, the transformation for controlling lighting source spectrum channel.The utility model makes lighting device be converted from spectrum channel angle,
To adapt to requirement of the image scene to spectrum transform.Spectrum enhances the change for the brightness value for directly causing image with transformation, to
Enhance or weaken the information of some features, distorted position directly reflects the smoothness of image, in smooth area, the brightness value of image
Change relatively small, the brightness value in the area that distorts changes very greatly in a small range.Especially there is the transparent material of color rendering, converts
Spectrum is particularly important.
The detection method carried out using the plate of material shape defect detecting system based on multichannel light source of the utility model, is answered
The flatness defect of measured material is obtained more with the plate of material shape defect detecting system based on multichannel light source of the utility model
Corresponding multichannel image data under the lighting source of channel transformation, measured material includes transparent material and non-transparent material.
Further, detection method includes：Controller controls lighting device in spatial channel down conversion, to provide multiple angle
Degree, more scene lightings；Controller controls lighting device in structure channel down conversion, to provide various structures optical illumination；Controller
Lighting device is controlled in spectrum channel down conversion, to provide multiple spectrum illumination；Imaging device connects when measured material is illuminated
Continuous scanning measured material, to obtain each channel imaging data；Image processing apparatus receives the image data that imaging device generates, and
Each channel imaging data is recombinated according to channel transfer sequence, imaging device is made to form independent picture number to each illumination channel
According to, and image analysis, identification flatness defect are carried out to independent image data.
Further, image processing apparatus is tested using the progress image analysis of soft light grating image defect identification method
The flatness defect information of material, soft light grating image defect identification method include：The structure light that image processing apparatus will be got
Image is cut into the raster grid using pixel as multiple；By four step phase-shifting methods, the spies such as image, the gray value of single raster grid are analyzed
Sign, analyzes its distortion, collects neighbouring distortion raster grid, flatness defect and flatness defect to identify measured material are grown accordingly
Degree, width and area, or carry out model comparision, the image of the identical raster grid of analysis logical place, gray scale with standard picture
The features such as value, identification distortion；In conjunction with triangulation calculation, the depth or height of flatness defect are calculated, to obtain the three of flatness defect
Tie up relative position.
The preferred embodiment of the utility model uses soft light grating image defect identification method, image processing apparatus that will obtain
The structure optical image arrived is cut into the raster grid using pixel as multiple with software approach, and then by four step phase-shifting methods, analysis is single
The distortion of a raster grid, to identify flatness defect and corresponding length, the width and area of measured material, in conjunction with triangle meter
It calculates, or even calculates the depth or height of flatness defect, to obtain the three-dimensional relative position of defect.Can also by with standard component
Image carry out Model Comparison, the gray value of the identical raster grid of logical place is subtracted each other, find biased error value grid be
Distort grid, to identify defect.The utility model is reachable using the raster grid of soft light grating image defect identification method cutting
Pixel grade, precision are far above rigid structure raster grid.
Detecting system according to the present utility model is become by lighting device in spatial channel, structure channel and spectrum channel
It changes, can detect the flatness defect detection of all kinds of tested flat-form materials, also can detect the measured material of all kinds of plane geometric shapes
Surface defects detection especially combines the image processing methods such as soft light grating image defect identification method, makes the length of flatness defect
Degree, width, area are more accurate, to greatly improve the recall rate and discrimination of flatness defect in measured material, also from basic
On overcome current defect system pair while identifying the deficiency of large-scale flatness defect and tiny flaw.
Further, for the measured material containing curved surface, by importing the threedimensional model of measured material or by sweeping
The standard component for retouching measured material carries out reconstructing three-dimensional model, obtains the three-dimensional references coordinate of measured material surface each point；Again with warp
The Measured Coordinates that triangulation calculation obtains subtract each other, and the difference point for deviateing fluctuation area is distortion point, collect neighbouring distortion point, to
Identification is tested curved-surface materials surface defect length, width and area and three-dimensional position.
Specifically, surface each point is obtained by importing transparent material threedimensional model for the transparent material containing curved surface
Three-dimensional references coordinate subtracts each other with Measured Coordinates are obtained through triangulation calculation, and the difference point for deviateing fluctuation area is distortion point, is collected
Neighbouring distortion point, to which identification is tested curved-surface materials surface defect length, width and area and three-dimensional position.If without corresponding three-dimensional
Model imports, and can first scan the standard component of detected transparent material, carries out standard component reconstructing three-dimensional model, obtains the three of surface each point
Standard coordinate is tieed up, then is subtracted each other with the Measured Coordinates obtained through triangulation calculation, the difference point for deviateing fluctuation area is distortion point, is converged
The neighbouring distortion point of collection, to identify curved surface transparent material surface defect length, width and area and three-dimensional relative position.
Further, by importing the threedimensional model of measured material, and based on the Measured Coordinates that are obtained through triangulation calculation
The threedimensional model of the measured material of reconstruction is compared, to be detected on the whole to the shape of measured material, such as abnormal angle,
Alice etc.；Or the standard component by scanning measured material carries out reconstructing three-dimensional model, is sat with the actual measurement obtained through triangulation calculation
The threedimensional model for being designated as the measured material of basis reconstruction is compared, to be examined on the whole to the shape of measured material
It surveys, such as abnormal angle, alice.
Further, the Measured Coordinates of measured material are obtained through triangulation calculation, and are rebuild and be tested based on Measured Coordinates
The threedimensional model of material obtains the length, width and height extreme value of measured material, to realize that overlength, ultra-wide, superelevation to measured material are examined
It surveys.
Further, testing result according to the present utility model is for statistical analysis, and can accurately classify measured material
Flatness defect classification, such as camber, shape wave, wooden dipper be bent or side sway, concave point, salient point, scuffing, viscous tin, rubble, successively to product
Carry out quality grading, and with corresponding stamp equipment collaboration, send credit rating information, stamp is in measured material surface, follow-up ring
The direct reading code of online robot of section carries out smart-cut, rejects distortion section or intelligent sorting；Analysis result intelligence can be utilized
The quality stability of material production line can be evaluated and tested, and associated production technique is optimized according to this, is transformed；Also using acquisition
The defective data information arrived accurately calculates defect length, width, area and three-dimensional relative position information, directly draws plate shape and lacks
Sunken flat distribution map can also draw out the three-dimensional distribution map of flatness defect if importing the three-dimensional modeling figure of measured material.
Fig. 1 shows the detecting system according to the present utility model for detecting the flatness defect of measured material 8.Detection system
System include imaging device have camera 1, camera lens 2, lighting source 3, imaging device data telecommunication line cable 4, the controller communications cable 5,
Controller 6, image processing apparatus 7, measured material 8, transmission device (not shown in figure 1), support device (not shown), angle rotation
Rotary device (not shown).
In the present invention, measured material 8 can be transparent material, for example, unorganic glass, organic glass, acrylic or
Any other transparent material.Transparent material can be tablet, column or other geometries, such as float glass belt, glass of automobile
Glass, mobile phone faceplate glass, glass column etc..Measured material 8 can also be non-transparent material, such as metallic plate, organic plates, floor tile
Or any other non-transparent material.Non-transparent material can be tablet, column or other geometries, such as steel plate, aluminium alloy
Proximate matter, PVC board etc..
Transmission device for allow measured material 8 with respect to camera 1 relatively move, i.e., between the lower and upper cross-member of support device between
Generate relative movement.For example, as shown in fig. 1, by the way that measured material 8 is generated relative to camera 1 and the movement of lighting source 3
Above-mentioned relative movement.It can also be by obtaining above-mentioned relative movement relative to 8 Mobile support device of measured material.Such as work as quilt
When the transparent material quality of detection is very big, size is very big, shape is special, Mobile support device more holds than mobile measured material 8
Easily.Transmission device in the utility model includes such as balladeur train, stepper motor, conveyer belt, supporting rack.If having on production line
Transmission device, then it is available.By example and without limitation, it hereinafter it will be assumed that camera 1, image processing apparatus 7 are kept
It is fixed, and measured material 8 is enabled to be moved relative to them, rotational angle under the action of angle rotating device of lighting source 3.
Fig. 1 shows camera 1 in plate of material shape defect detecting system of the utility model based on multichannel light source, illumination
Light source 3, controller 6, image processing apparatus 7 and they and measured material 8 relative position relation.As shown in Figure 1, at this
In flatness defect detecting system, measured material 8 along plan view vertical direction with speed V uniform motion.It is examined in the flatness defect
In examining system, lighting source 3 can be respectively arranged in the homonymy of measured material 8 with camera 1, also can not homonymy, be suitable for 1 work of camera
As suitable, it is preferably mounted at the homonymy of measured material 8.1 installation site of camera can be perpendicular to 8 plane of measured material, or appoints
Meaning oblique angle, being suitable for Image Acquisition is advisable, and can also be rotated to the angle needed under the action of imaging device angle rotating device
Degree.Camera 1 is responsible for collecting light, and the light being collected into is imaged onto on its photosurface, and converts electric signal.In this example, camera 1
Image-forming assembly can be used CCD linear array imagings component, CMOS linear array imagings component or other image-forming assemblies, and integrated respective image
Processing function exports related defective data information etc..In this example, camera 1 is mounted in beam base, the focusing of initial position
Median perpendicular is in 8 plane of measured material.
In Fig. 1, the angle rotating device of camera 1 is opened, camera 1 is under arm cyclone and the collaboration of beam cyclone, and rotation is extremely
Angle shown in Fig. 1, perpendicular to the plane of measured material 8.The angle rotating device for opening lighting source 3, in arm cyclone and beam
Under cyclone collaboration, rotation to angle shown in Fig. 1, oblique angle incidence measured material 8.Certainly, for the tested of different geometries
Material, can synchronous adjustment camera 1 and lighting source 3 as needed angle, so that camera 1 is caught from 3 incidence angle front of lighting source
Obtain image.The exemplary lighting sources 3 of Fig. 1 be soft structure illuminating apparatus, the structure light shape defined in image processing apparatus 7,
Definition spectrum is feux rouges, and line-structured light is used for this measured material 8.If 8 surfacing zero defect of measured material, camera 1 will
Image shown in Fig. 2 is obtained, if 8 surface of measured material has convex type defect, camera 1 that will obtain image shown in Fig. 3.For complicated several
The measured material of what shape converts angle, to the quilt of complex geometric shapes by opening the angle rotating device of lighting source 3
Material of measuring and monitoring the growth of standing timber is carried out without blind spot lighting, camera 1 under angle rotating device effect, realize and be imaged under respective illumination field scape.
Fig. 2 is 8 surfacing zero defect image of measured material, is a smooth straight line.Image processing apparatus 7 is using soft
Image 2 is analyzed in raster grid image deflects recognition methods, is cut into the grid being sized, calculates the gray scale of each grid
Value, through four step phase-shifting methods, the grid gray value of adjacent position is subtracted each other, and adjacent image relative position gray value subtracts each other, and is found inclined
Grid i.e. distortion grid from error amount, testing result shows undistorted grid, or carries out pattern ratio with the image of standard component
It is right, the gray value of the raster grid of same logical location is subtracted each other, the grid i.e. distortion grid of biased error value is found.
Fig. 3 is the image that there is convex type defect on 8 surface of measured material, for a curve with bending.Image procossing fills
It sets 7 and image 2 is analyzed using soft light grating image defect identification method, be cut into the grid being sized, calculate each grid
The gray value of lattice subtracts each other the grid gray value of adjacent position through four step phase-shifting methods, adjacent image relative position gray value phase
Subtracting, the grid for finding biased error value distorts grid, collects the raster grid of neighbouring distortion, writes down distortion grid initial position,
To obtain the two-dimentional relative position of defect, if the area on corresponding 8 surface of measured material of each distortion grid is added, can obtain
The area of 8 flatness defect of measured material is obtained, or Model Comparison, the gray scale of same position raster grid are carried out with the image of standard component
Value is subtracted each other, and the grid i.e. distortion grid of biased error value is found, to identify defect.In addition, spectrum enhancing is directly drawn with transformation
The change for playing the brightness value of image, to enhance or weaken the information of some features, distorted position directly reflects the smooth of image
Degree, relatively small in the brightness value variation of smooth area, image, the brightness value in the area that distorts changes very greatly in a small range.Especially
It is the transparent/non-transparent material for having color rendering, distort weak defect, and conversion spectrum is particularly important.Therefore, flatness defect detects
In need conversion spectrum, to obtain the defect image under different spectrum, for image processing apparatus 7 carry out flatness defect analysis.
Fig. 3 is the image that there is convex type defect on 8 surface of measured material, and A is the friendship of incident ray and bump defects certain point
Point, O are the intersection point of incident ray extended line and measured material plane, and A ' is upright projections of the A in measured material plane, and θ is
The angle of incident ray and 8 plane of measured material.With reference to Fig. 4, defect processing system 7 is through image analysis, between being put by O points to A '
How much is pixel, calculates OA ' length, then has the height AA ' of protrusion：AA '=tan θ OA ', equally, defect processing system 7 is through figure
As the pixel number of analysis A vertical and horizontal, the two-dimentional relative position of defect A is calculated, to obtain the three-dimensional relative position of A, is converged
Collect the three-dimensional relative position of all distortion points, the area for the raster grid that distorts, to obtain three-dimensional relative position, the length of all defect
Degree, width, area.
The acquisition of structure light can also be by placing Grating Film or raster grid realization on 8 surface of measured material.Or it is shining
3 preposition Grating Film of Mingguang City source or raster grid are realized.
Flatness defect detecting system shown in Fig. 1 is converted by lighting device in spatial channel, structure channel and spectrum channel
Under, all kinds of tested plate material flatness defects are can detect, the measured material surface defect of all kinds of plane geometric shapes is also can detect,
The image processing methods such as soft light grating image defect identification method are especially combined, make the length of flatness defect, width, area more
To be accurate, to greatly improve the recall rate and discrimination of flatness defect in measured material, current lack also fundamentally is overcome
Fall into the deficiency that system pair identifies large-scale flatness defect and surface defect simultaneously.And for the measured material containing curved surface, by leading
Enter measured material threedimensional model, obtain the three-dimensional references coordinate of surface each point, or be introduced directly into its three-dimensional coordinate, and through triangle meter
It calculates acquisition Measured Coordinates to subtract each other, the difference point for deviateing fluctuation area is distortion point, collects neighbouring distortion point, to identify curved surface
Measured material surface defect length, width and area and three-dimensional position.If no corresponding threedimensional model imports, detecting system elder generation can be used
The standard component of detected transparent material is scanned, standard component reconstructing three-dimensional model is carried out, obtains the three-dimensional standard coordinate of surface each point, then
Measured Coordinates are obtained with detecting system through triangulation calculation to subtract each other, the difference point for deviateing fluctuation area is distortion point, is collected neighbouring
Distortion point, to identify curved surface measured material surface defect length, width and area and three-dimensional relative position.
It illustrates, the light source in the utility model is preferably semiconductor light source or ordinary light source.Spectral region without
Limitation, but need to be within the sensitive volume of imaging device.In this example, lighting source 3 and camera are controlled by controller 6
1 unlatching, the two, which is opened, to be synchronized.In order to control the work schedule of camera 1 and lighting source 3, in the flatness defect detection system of Fig. 1
Controller 6 is provided in system.Controller 6 is used to control control camera 1 and each in lighting source 3 as external trigger source
Trigger sequential.Controller 6 may include any kind of pulse trigger, such as, but not limited to, encoder.In detection process,
Controller 6 senses the displacement of measured material 8 and controls the operation of each control camera 1, lighting source 3 so that week is illuminated at one
Primary all images are completed in phase to obtain.
Experiment display, the flatness defect detecting system of the present embodiment can also to camber, shape wave, wooden dipper be bent or side sway, recessed
The various flatness defects such as point, salient point, scuffing, viscous tin, rubble accurately identify and classify.Due to realizing spatial channel, knot
The transformation in structure channel and spectrum channel, compared with prior art, size, position, shape, depth or the height of flatness defect are more
Precisely, defect detection rate and discrimination higher preferably adapt to the flatness defect of the transparent/non-transparent material of various geometries
Detection, can also detect the transparent/non-transparent System of Detecting Surface Defects For Material of tablet simultaneously.
The above-mentioned example of the utility model be should be noted that merely for the sake of purposes of illustration and description, and be not intended to
The utility model is limited in disclosed concrete form.Those skilled in the art are fully able to by reading this specification
Envision various forms of modifications and variations.For example, in the flatness defect detecting system of the utility model, lighting device and at
As device can also increase, be not limited to 1 set, can be more sets, can also be deployed in below transparent material, can also above, or on
Lower section is disposed simultaneously, and light angle and imaging angle cooperate.
Claims (12)
1. a kind of plate of material shape defect detecting system based on multichannel light source, which is characterized in that be used for measured material more
Flatness defect detection is carried out under the lighting source of channel transformation, the detecting system includes：
Imaging device, for carrying out image scanning to measured material；
Lighting device, it is described for providing the lighting source that spatial channel, structure channel and spectrum channel convert to measured material
Between the lighting area of lighting device within the visual angle of the imaging device；
Support device supports the imaging device and the lighting device for installing；
Transmission device, for so that generating opposite move between the measured material and the imaging device and/or the lighting device
It is dynamic；
Controller connects the imaging device and the lighting device, for controlling the lighting device in each interchannel and leading to
Three-dimensional switching in road, and continuous scanning is carried out to obtain when the measured material is illuminated for controlling the imaging device
Take each channel imaging data；
Image processing apparatus is communicated to connect with the controller and the imaging device, for generating control instruction to the control
Device processed simultaneously receives the image data that the imaging device generates.
2. the plate of material shape defect detecting system according to claim 1 based on multichannel light source, which is characterized in that
The lighting device includes lighting source and angle rotating device, and the lighting source is connected by the angle rotating device
It is connected in the support device；
The angle rotating device connects the controller, and the illumination is controlled under the order-driven generated by the controller
Light source realizes the transformation in spatial channel.
3. the plate of material shape defect detecting system according to claim 2 based on multichannel light source, which is characterized in that
The angle rotating device is at least one of arm cyclone, beam cyclone, cradle head device, spin device.
4. the plate of material shape defect detecting system according to claim 3 based on multichannel light source, which is characterized in that
The arm cyclone includes stepper motor, rotating mechanism, the stepper motor be mounted in the support device and with institute
It states rotating mechanism to be connected, the lighting source is connected by beam base with the rotating arm of the rotating mechanism, the stepping electricity
Machine drives the rotating arm rotation that the lighting source incident direction is made to be tested with described under the order-driven of the controller
Material plane is in required angle.
5. the plate of material shape defect detecting system according to claim 3 based on multichannel light source, which is characterized in that
The beam cyclone includes stepper motor, rotating mechanism, the stepper motor be mounted in the support device and with institute
It states rotating mechanism to be connected, the lighting source is connected by beam base with the rotating mechanism, and the stepper motor is described
The rotating mechanism rotation is driven under the order-driven of controller to drive the beam base rotation to make the lighting source
Incident direction is in required angle with the measured material plane.
6. the plate of material shape defect detecting system according to claim 3 based on multichannel light source, which is characterized in that
The cradle head device includes the holder being mounted in the support device, and lighting source is directly mounted on the holder,
The holder rotate to drive under the order-driven of the controller lighting source turn to incident direction with it is described
Measured material plane is in required angle.
7. the plate of material shape defect detecting system according to claim 3 based on multichannel light source, which is characterized in that
The spin device includes stepper motor, rotating mechanism, the stepper motor be mounted in the support device and with institute
It states rotating mechanism to be connected, the lighting source is connected with the rotating mechanism, instruction of the stepper motor in the controller
Drive the lower drive rotating mechanism rotation to drive the lighting source to be carried out certainly by axis of the central axes of lighting source
Rotation.
8. the plate of material shape defect detecting system according to claim 1 based on multichannel light source, which is characterized in that
The lighting device includes the soft structure illuminating apparatus and/or rigid structure optical illumination dress for providing various structures light
It sets；
The various structures light includes structure light, line-structured light, scatterplot structure light, area-structure light, line grating structure light, lattice light
At least one of grid structure light.
9. the plate of material shape defect detecting system according to claim 8 based on multichannel light source, which is characterized in that
The rigid structure illuminating apparatus includes LED light source matrix, and each LED light source corresponds to a grid；
The controller connects the LED light source matrix, for controlling the LED light source matrix timesharing switching illumination to realize
It states lighting source and forms required structure light in the transformation of structure channel.
10. the plate of material shape defect detecting system according to claim 1 based on multichannel light source, which is characterized in that
The Grating Film or raster grid for being used to form various structures light are provided with before the lighting device；
Or measured material surface is provided with the Grating Film or raster grid for being used to form various structures light.
11. the plate of material shape defect detecting system according to claim 1 based on multichannel light source, which is characterized in that
The lighting device includes the lighting source for providing multiple spectrum transformation,
The controller connects the lighting source, the transformation for controlling the lighting source spectrum channel.
12. the plate of material shape defect detecting system according to claim 1 based on multichannel light source, which is characterized in that
The imaging device is connected to by angle rotating device in the support device；
The angle rotating device connects the controller, and the imaging is controlled under the order-driven generated by the controller
Device realizes that spatial alternation makes imaging device realize multi-angle imaging；
The angle rotating device is at least one of arm cyclone, beam cyclone, cradle head device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109297990A (en) * | 2018-11-12 | 2019-02-01 | 四川旭虹光电科技有限公司 | A kind of detection method of glass microdefect |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109297990A (en) * | 2018-11-12 | 2019-02-01 | 四川旭虹光电科技有限公司 | A kind of detection method of glass microdefect |
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