CN108106576A - A kind of ceramic tile flatness on-line measuring device and detection method - Google Patents
A kind of ceramic tile flatness on-line measuring device and detection method Download PDFInfo
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- CN108106576A CN108106576A CN201810057133.0A CN201810057133A CN108106576A CN 108106576 A CN108106576 A CN 108106576A CN 201810057133 A CN201810057133 A CN 201810057133A CN 108106576 A CN108106576 A CN 108106576A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 89
- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 239000011449 brick Substances 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 21
- 238000000205 computational method Methods 0.000 abstract description 8
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000004441 surface measurement Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of apparatus for detecting ceramic tile flatness and method, detection device includes rack, rack-mounted structure light image transmitter, area array cameras and computer composition；Rack is mainly used for bearing structure light image transmitter, area array cameras, structure light image transmitter is mainly used for sending out the structured light patterns for being irradiated to ceramic brick surface, area array cameras plays the pattern in Ceramic Tiles for shooting line structure light image transmitter, and sends computer to and analyzed.Computer receives the picture of camera acquisition, calculates the elevation information of ceramic brick surface measurement point and determines whether qualification according to ceramic tile flatness computational methods, and classifies to Ceramic Tiles.The present invention stablizes, is accurate, and compared with prior art, element cost that equipment uses is relatively low, stability is good, does not have Mechanical Moving in measurement process, equipment life is long, and reliability is high.
Description
Technical field
The present invention relates to ceramic tile production technical field, especially a kind of ceramic tile flatness on-line measuring device and side
Method.
Background technology
Main to the detection method of ceramic tile flatness at present or manual inspection, detection method mainly using clearance gauge method,
The contacts method such as amesdial method, can only inspect by random samples for substantial amounts of Ceramic Tiles, and under detection efficiency, the working environment of workers is disliked
It is bad.Many work has also been made in the country in terms of the automatic detection of ceramic flat surface degree, a collection of patent occurs in some directions
Technology.But these technologies, all there are some problem and shortage, detection function is more single.
Such as the Chinese invention patent of Application No. 201410017941.6, a kind of slidingtype ceramic tile surface flatness inspection is disclosed
Devices and methods therefor is surveyed, using 3 laser range finders, thus tile is counted by obtaining range deviation after laser range finder
Ceramic tile surface flatness is calculated, but this method can not solve potsherd and occur bounce and displacement in moving process and cause to measure
The problem of unstable result.For another example the Chinese invention patent of Application No. 20150646060.5 discloses a kind of tile flatness inspection
Method and device is surveyed, the laser displacement sensor moved using several along line slideway measures ceramic tile between sensor
Away from, tile planarity is calculated, but this method needs potsherd to stop mobile and is detected, and detection time is longer, efficiency bottom
Under.For another example the Chinese utility model patent of Application No. 201520647768.8 discloses a kind of ceramic tile based on machine vision and puts down
Whole degree detection device it uses structure light source knead dough array camera, the shape decision reflected by detection structure light on tile
The flatness of tile can carry out the dynamic detection in moving process, but be only able to detect plane transverse direction（X-direction）Curved surface
Deformation, it is impossible to detect plane longitudinal direction（Y direction）Curved surface deformation.
The GB/T3810 put into effect for Ceramic Tiles quality testing, country in 2006《Ceramic Tiles test method》Country's mark
Standard, wherein part 2：The measurement of planeness of the detection of size and surface quality to Ceramic Tiles（Curvature and angularity）In detection
Hold and detection method has done detailed regulation, in this, as the standard of Ceramic Tiles quality assurance.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned prior art, a kind of simple in structure, detection stabilization and standard are provided
Really, untouchable ceramic tile flatness on-line measuring device and detection method.
To achieve these goals, the technical solution adopted by the present invention is：A kind of ceramic tile flatness device for fast detecting,
It is characterized in that：Including rack, two structure light image transmitters, area array cameras, Ceramic Tiles handling equipment and computer；
Rack is equipped with detection station, and the area array cameras and two structure light image transmitters are separately mounted to above detection station,
2 line laser transmitters are connected into 90 degree of angles, area array cameras by data cable with the computer after installation；The structure light
Image generator is structure light laser emitter or projector.
Further, the structure light laser emitter is line laser transmitter or coded laser light transmitter.
Further, it is also associated with a label machine on the computer.
Further, the Ceramic Tiles handling equipment is robot device and/or conveyer belt apparatus.
Invention additionally discloses a kind of ceramic tile flatness rapid detection methods, are quickly detected using above-mentioned ceramic tile flatness
Device is detected, and is included the following steps：Step 1: installing inspection software system in computer, after starting measurement, pass through pottery
The Ceramic Tiles of feeding area are sent to measured zone by ceramic tile handling equipment；Step 2: line laser transmitter hair one or more
By ceramic tile edges and the line laser of center line, line-structured light pattern is formed in ceramic brick surface；Step 3: area array cameras is clapped
Ceramic brick surface structure light image is taken the photograph, and sends image to computer and calculates；Step 4: computer is according to line-structured light image
Calculating there emerged a point height position, therefrom extract several measurement point height numbers, and calculate center curvature degree, side curvature and
Three measured values of angularity；Step 5: the center curvature degree calculated according to step 5, side curvature and angularity three are surveyed
Magnitude compares with normal data, judges whether measured Ceramic Tiles are qualified；Step 6: according to step 5 judgement as a result, pottery
Detected Ceramic Tiles are sent out detection station and classified by ceramic tile handling equipment.
The beneficial effects of the invention are as follows：Detection device uses less expensive component, and production cost is low, can be by contactless
Mode be detected, there is no Mechanical Moving in detection process, equipment life is long, and reliability is high, as a result accurately, in measurement process
The detection process and result of equipment meet the GB/T3810 put into effect in 2006《Ceramic Tiles test method》Requirements of the national standard.
Description of the drawings
The present invention is described in further detail below in conjunction with the accompanying drawings.
The structure chart of detection device in Fig. 1 present invention.
Fig. 2 structure light operation principles.
Fig. 3 Ceramic Tiles center curvature degree measuring principles.
Fig. 4 Ceramic Tiles side curvature measuring principle.
Fig. 5 Ceramic Tiles angularity measuring principles.
Fig. 6 line laser structured lights position and measurement point position view.
Fig. 7 working-flow figures.
Specific embodiment
As shown in Figure 1, a kind of ceramic tile flatness device for fast detecting of the present invention, including 1, two structure light image of rack
Transmitter 2, area array cameras 3, Ceramic Tiles handling equipment and computer.Detection station, the area array cameras are equipped in rack 1
Be separately mounted to two structure light image transmitters above detection station, after installation 2 line laser transmitters into 90 degree of angles,
Area array cameras 3 is connected by data cable with the computer；The action of Ceramic Tiles handling equipment is controlled by the computer.When
So, during practical application, area array cameras can also be connected by wireless network with computer.
The structure light image transmitter 2 is structure light laser emitter, and the structure light laser emitter can be line
Laser emitter can also use coded laser light transmitter.Certainly, during practical application, projector can also be used as structure
Light image transmitter, emitting structural light image.
Further, the Ceramic Tiles handling equipment can be robot device 4 and conveyer belt apparatus 5.Conveyer belt
Device 5 is mounted in rack 1, for the transmission of ceramic tile to be detected, when Ceramic Tiles are transported to measurement station by conveyor, triggering
The photoelectric sensor of installation on the conveyor belt stops conveyor and continues to move along.After system detectio, qualification is determined whether.
Qualified ceramic tile then continues to transmit, underproof, leaves conveyer belt by robot device crawl, carries out product classification.
Further, it is also associated with a label machine on the computer.The present invention is made to complete the smooth of Ceramic Tiles
After degree measurement, " qualification " or " unqualified " label can be directly printed upon in Ceramic Tiles, convenient process identification below.
It, as structure light image transmitter 2, is further described below by using line laser transmitter.Such as Fig. 2-7
It is shown, it is three-dimensional highly for measuring ceramic tile surface present invention preferably employs two line laser transmitter emitting structural light, specifically
Single line-structured light measurement height operation principle is shown in Fig. 2, and two line-structured lights can make measurement accuracy more accurate, avoid simultaneously
Single structure light guide causes the problem of measurement " blind area ".Line-structured light image is projected ceramic tile surface by line laser transmitter, from another
One angle is observed that the striped deformed due to the modulation by object height, and this deformation may be interpreted as phase and amplitude is equal
The spatial carrier signal modulated.Area array cameras 3 gathers deforming stripe and it is demodulated, and recovers phase information, and then
Height is determined by phase, here it is the basic principles of the method for structured light based on phase.
Line laser forms an angle be radiated at ceramic brick surface after, area array cameras can take when ceramic brick surface is smooth
Straight line.If straight line will become a curve when ceramic brick surface has protrusion or bending, pass through point on calculated curve
Ceramic brick surface actual height can be retrieved as by deviateing the distance of original rectilinear position.Pass through two groups of orthogonal line-structured lights
The apparent height of the horizontal and vertical both direction of ceramic tile surface can be obtained.
As a kind of optimization of the present invention, detection coverage can be expanded, by laser rays coverage in survey engineering
Ceramic tile surface height calculates and is fitted altitude curve, and the three-dimensional coordinate of each position is substituted into center curvature degree, side curvature
With angularity measure equation.The coverage of measurement is increased, improves the recall rate of substandard product.
The inspection being detected using above-mentioned ceramic tile flatness device for fast detecting to ceramic tile flatness is described in detail again below
Survey method in order to preferably realize the detection method and displaying measurement result.The detecting system uses Visual
2013 program frames of Studio.net are developed, and carry out graphical analysis using OpenCV and processing, testing result are closed by OpenGL
Three-dimensional Display is carried out into cloud data.The testing process of ceramic tile flatness is as follows：
Step 1: the Ceramic Tiles of feeding area are sent to by measured zone by handling equipment.
Step 2: 2 line laser transmitters send out 3 respectively by ceramic tile edges and the line laser of center line respectively,
Ceramic brick surface forms structure light curve.
Step 3: the area array cameras mounted on top shoots ceramic brick surface structure light curve image, and image is transmitted
To computer.
Step 4: computer there emerged a point height position according to the calculating of line-structured light curve image, 9 measurement points are therefrom extracted
Height number calculates three center curvature degree, side curvature and angularity measured values.
Step 5: the center curvature degree, three measured values of side curvature and angularity and the mark that are calculated according to step 5
Quasi- data compare, judge be measured Ceramic Tiles whether qualified products.
Step 6: according to step 5 judgement as a result, the Ceramic Tiles that Ceramic Tiles handling equipment will be detected send out detection
Station is simultaneously classified.
Further, the computational methods for the ceramic tile flatness being designed into step 4 are according to national standard GB/T3810 to smooth
The definition of measurement is spent, three center curvature degree, side curvature and angularity measured values can be divided into.According to national standard to measuring method
It is required that as shown in fig. 6,9 intersection points are selected on 6 laser rays respectively（P1 -P9）As measurement point, each measurement point can
Its elevation information is read with the deformation position by line laser, in order to obtain higher precision, two lines laser can be read
Average value.
Center curvature degree computational methods：As shown in Figure 3 and Figure 6, center curvature degree deviates for the central point in brick face by four
The distance of plane determined by 3 points in angle point；The calculating of central point curvature is related to 4 angle points P1, P3 shown in Fig. 6,
P7, P9 and center point P 5.Computational methods are first to take 3 angle points in 4 angle points, such as P1, P3, P7 substitute into formula 1 and fit
This 3 points of plane equations determinedAnd.5 coordinate value of center point P is brought into
The vertical range of 5 to 3 angle point fit Plane of center point P is obtained in formula 2.Repetition take other 3 angle point fit Planes, respectively simultaneously band
Enter range formula centering point to the distance of fit Plane, bring each point distance into formula 3 after finishing, maximum range is taken to be used as should
The center curvature degree of Ceramic Tiles.
Side curvature degree computational methods：As shown in Figure 4 and Figure 6, the midpoint of a line of side curvature degree is deviateed by 4 angles
3 points in point determine.The calculating of side curvature is related to P1, P3, P7, P9 and four side central points of four angle points shown in Fig. 6
P2,P4,P6,P8.Computational methods are that 3 angle points in 4 angle points, such as P1, P3, P7 is first taken to bring formula 1 into and fit plane
Equation.It is flat by 2 to 3 angle point P1, P3, P7 fittings of center point P when range formula 2 is obtained are brought into the coordinate position of center point P 2
The vertical range in face.Above-mentioned previous action is repeated, by other 3 side center point Ps 4, P6, P8 brings range formula calculating into respectively
They arrive the distance between fit Plane；3 angle point fit Planes are reselected, and calculate 4 side central points to fit Plane
The distance between.Complete all combination after, take while central point to angle point fit Plane maximum be the Ceramic Tiles while it is curved
Curvature.
Angularity computational methods：As shown in Figure 5 and Figure 6, angularity is determined by 4 angle points of Ceramic Tiles, is related to four
A angle point P1, P3, P7, P9.Computational methods are that 3 angle points in 4 angle points, such as P1, P3, P7 is first taken to bring formula 1 into and be fitted
Go out its plane equation, the 4th angle point P9 is calculated it by range formula 2 arrives the distance between fit Plane.Reselect 3
The 4th angle point of a angle point fit Plane and calculating arrives the distance between fit Plane, selects maximum as warp values.
GB/T3810《Ceramic Tiles test method》To three center curvature, side curvature and angularity measuring method regulations
The specific location of measurement point, but this regulation has the defects of certain in terms of practice.It essentially consists in selection measurement point and is fixed as porcelain
9 points inside brick are present with the problem of warpage or protrusion occur for the position beyond 9 points in Ceramic Tiles manufacturing process.According to
Standard, which simply measures this 9 positions, may occur missing inspection, so as to influence testing result.As the present invention a kind of optimization,
Expand detection coverage, the ceramic tile surface height of laser rays coverage calculated entirely in survey engineering, is fitted altitude curve,
And each point three-dimensional coordinate is substituted into center curvature degree, side curvature and angularity measure equation.The coverage of measurement is increased, is carried
The recall rate of high substandard product.
More than content is merely illustrative of the technical solution of the present invention, and those of ordinary skill in the art are to the technology of the present invention
The simple modification or equivalent substitution that scheme carries out, all without departing from the spirit and scope of technical solution of the present invention.
Claims (5)
1. a kind of ceramic tile flatness device for fast detecting, it is characterised in that：Including rack, two structure light image transmitters,
Area array cameras, Ceramic Tiles handling equipment and computer；Detection station, the area array cameras and two structures are equipped in rack
Light image transmitter is separately mounted to above detection station, and 2 line laser transmitters are led into 90 degree of angles, area array cameras after installation
Data cable or wireless network is crossed with the computer to be connected；
The structure light image transmitter is structure light laser emitter or projector.
2. the ceramic tile flatness device for fast detecting according to claim 1 claim, it is characterised in that：The structure
Ray laser transmitter is line laser transmitter or coded laser light transmitter.
3. ceramic tile flatness device for fast detecting according to claim 2, it is characterised in that：Also connect on the computer
It is connected to a label machine.
4. the ceramic tile flatness device for fast detecting according to claim 1-3, it is characterised in that：Above and below the Ceramic Tiles
It is robot device and/or conveyer belt apparatus to expect device.
5. a kind of ceramic tile flatness rapid detection method, using the Ceramic Tiles described in any one of claim 1-4 claim
Flatness device for fast detecting is detected, and is included the following steps：
Step 1: inspection software system is installed in computer, after starting measurement, by Ceramic Tiles handling equipment by feed zone
The Ceramic Tiles in domain are sent to measured zone；
Step 2: line laser transmitter sends out one or more by ceramic tile edges and the line laser of center line, in Ceramic Tiles table
Face forms line-structured light pattern；
Step 3: area array cameras shoots ceramic brick surface structure light image, and send image to computer and calculate；
Step 4: computer there emerged a point height position according to the calculating of line-structured light image, several measurement point heights are therefrom extracted
Numerical value, and calculate three center curvature degree, side curvature and angularity measured values；
Step 5: the center curvature degree, three measured values of side curvature and angularity and the criterion numeral that are calculated according to step 5
According to comparing, judge whether measured Ceramic Tiles are qualified；
Step 6: according to step 5 judgement as a result, the Ceramic Tiles that Ceramic Tiles handling equipment will be detected send out detection station
And classify.
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| CN201810057133.0A CN108106576A (en) | 2018-01-22 | 2018-01-22 | A kind of ceramic tile flatness on-line measuring device and detection method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108940898A (en) * | 2018-06-05 | 2018-12-07 | 横店集团东磁股份有限公司 | Detect the production line of tile-type magnet angularity and intensity |
| CN109141341A (en) * | 2018-08-24 | 2019-01-04 | 海宁佳盛汽车零部件有限公司 | A kind of surface smoothness inspection method of automobile hub unit |
| CN110986766A (en) * | 2019-12-06 | 2020-04-10 | 北京科技大学 | Detection device and method for tile laying position based on machine vision |
| CN111197968A (en) * | 2018-11-19 | 2020-05-26 | 北新集团建材股份有限公司 | Method for detecting plate |
| CN111709934A (en) * | 2020-06-17 | 2020-09-25 | 浙江大学 | Injection molding impeller warping defect detection method based on point cloud characteristic comparison |
| CN111795657A (en) * | 2020-07-16 | 2020-10-20 | 南京大量数控科技有限公司 | Device and method for rapidly measuring flatness of flexible plate |
| CN112781507A (en) * | 2020-12-24 | 2021-05-11 | 山西大数据产业发展有限公司 | Intelligent analysis system and method for laser thickness measurement of cold-rolled steel plate |
| CN112779566A (en) * | 2019-11-08 | 2021-05-11 | 环太铜业株式会社 | Method and apparatus for manufacturing metal material |
| CN113310438A (en) * | 2020-02-26 | 2021-08-27 | 广东博智林机器人有限公司 | Flatness measuring method, flatness measuring device, computer equipment and storage medium |
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| CN113358070A (en) * | 2021-07-07 | 2021-09-07 | 苏州鑫睿益荣信息技术有限公司 | Automobile brake pad flatness and pin height detection system and detection method thereof |
| CN113884016A (en) * | 2021-06-16 | 2022-01-04 | 成都新锐科技发展有限责任公司 | Battery piece warping degree detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108940898A (en) * | 2018-06-05 | 2018-12-07 | 横店集团东磁股份有限公司 | Detect the production line of tile-type magnet angularity and intensity |
| CN109141341A (en) * | 2018-08-24 | 2019-01-04 | 海宁佳盛汽车零部件有限公司 | A kind of surface smoothness inspection method of automobile hub unit |
| CN111197968A (en) * | 2018-11-19 | 2020-05-26 | 北新集团建材股份有限公司 | Method for detecting plate |
| CN112779566A (en) * | 2019-11-08 | 2021-05-11 | 环太铜业株式会社 | Method and apparatus for manufacturing metal material |
| CN110986766A (en) * | 2019-12-06 | 2020-04-10 | 北京科技大学 | Detection device and method for tile laying position based on machine vision |
| CN110986766B (en) * | 2019-12-06 | 2021-02-12 | 北京科技大学 | Detection device and method for tile laying position based on machine vision |
| CN113310438A (en) * | 2020-02-26 | 2021-08-27 | 广东博智林机器人有限公司 | Flatness measuring method, flatness measuring device, computer equipment and storage medium |
| CN111709934A (en) * | 2020-06-17 | 2020-09-25 | 浙江大学 | Injection molding impeller warping defect detection method based on point cloud characteristic comparison |
| CN111709934B (en) * | 2020-06-17 | 2021-03-23 | 浙江大学 | Injection molding impeller warping defect detection method based on point cloud characteristic comparison |
| CN111795657B (en) * | 2020-07-16 | 2022-02-15 | 南京大量数控科技有限公司 | Device and method for rapidly measuring flatness of flexible plate |
| CN111795657A (en) * | 2020-07-16 | 2020-10-20 | 南京大量数控科技有限公司 | Device and method for rapidly measuring flatness of flexible plate |
| CN112781507A (en) * | 2020-12-24 | 2021-05-11 | 山西大数据产业发展有限公司 | Intelligent analysis system and method for laser thickness measurement of cold-rolled steel plate |
| CN113884016A (en) * | 2021-06-16 | 2022-01-04 | 成都新锐科技发展有限责任公司 | Battery piece warping degree detection method |
| CN113884016B (en) * | 2021-06-16 | 2024-02-13 | 成都新锐科技发展有限责任公司 | Method for detecting warping degree of battery piece |
| CN113358070A (en) * | 2021-07-07 | 2021-09-07 | 苏州鑫睿益荣信息技术有限公司 | Automobile brake pad flatness and pin height detection system and detection method thereof |
| CN113305170A (en) * | 2021-07-28 | 2021-08-27 | 佛山市腾华自动化机械有限公司 | Traction machine |
| CN114111651A (en) * | 2021-11-25 | 2022-03-01 | 江苏科技大学 | Vehicle-mounted pavement depression detection method based on multi-line structured light |
| CN114111620A (en) * | 2022-01-28 | 2022-03-01 | 杭州利珀科技有限公司 | Optical detection system and method for graphite boat body of crystalline silicon battery |
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