CN108917594A - A kind of machine vision device measuring household board size - Google Patents
A kind of machine vision device measuring household board size Download PDFInfo
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- CN108917594A CN108917594A CN201810533973.XA CN201810533973A CN108917594A CN 108917594 A CN108917594 A CN 108917594A CN 201810533973 A CN201810533973 A CN 201810533973A CN 108917594 A CN108917594 A CN 108917594A
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- 238000005259 measurement Methods 0.000 claims abstract description 27
- 238000003384 imaging method Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000005286 illumination Methods 0.000 claims abstract description 5
- 230000033001 locomotion Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 230000033764 rhythmic process Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000003708 edge detection Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The embodiment of the present invention provides a kind of machine vision device for measuring household board size.It is described measurement household board size machine vision device include：Control equipment；The conveyer belt being connect with control equipment, for transmitting household plate to be measured；With transmission band connection grating encoder, for real-time monitoring household plate to be measured transmission speed and to line scan camera send sampling pulse；The line focus light source being connect with the control equipment, for providing illumination for the imaging needed for detecting；The line scan camera being connect with the control equipment, for obtaining the digital picture of the household plate to be measured.
Description
Technical field
The present invention relates to test technique automatic fields, regard in particular to a kind of machine for measuring household board size
Feel device.
Background technique
The measurement of household slab geomitry size is the important link of its production process and quality control.So far, household plate
Length and width, hole, the size of slot and position measurement mainly by manually the contact type measurements tool such as vernier caliper, tape measure being used to complete,
Subjective factor influence is big, precision is low, speed is slow, it is difficult to realize extensive, high speed on-line checking.
" research of board dimension automatic tester " text is delivered within Feng Weizhong etc. 2008, is proposed a kind of based on linear
The automatic measuring instrument of the timber board head and tail width and length of CCD and computer, but the instrument can not rule out the interference of color etc.,
The precision of Industry code requirements has not yet been reached.The patent of invention " plate detection method " (CN105674885A) of Zhang Zhenhua in 2016 etc.
" multifunctional plate detection device " (CN105526869A), it is proposed that the group based on detection platform, slide rule and dial gauge attaches together
It sets, by the method for artificial detection strip width, length, thickness, verticality and flatness.This method and apparatus belong to contact
Manual measurement, speed and precision are relatively low.In April, 2017, Li Xuejiao etc. have delivered " the heavy parts size based on machine vision
A measuring technique " text, proposes more merging algorithm for images of heavy parts and the part size algorithm based on edge detection, but do not have
Imaging technique is related to, the position in hole and slot and the machine vision metrology of geometric dimension are not suitable for.In May, 2017, Xie Jun etc.
Human hair table " two dimensional size measurement based on a machine vision " text, proposes to be constituted with LED light, CMOS area array cameras and computer
The method of NI Vision Builder for Automated Inspection measure annular Central of the parts hole internal diameter, but this method is only applicable to single ring-shaped work pieces, and LED
Illumination can not rule out the disturbing factor of color, texture, pattern and surface defect etc..
The length and width of traditional household plate, hole, slot size mainly pass through manual operations, machinery instrument and ultrasonic technology inspection
It surveys.Manual operations be easy influenced by personal experience and subjective factor, be at high cost, precision is low, speed is slow.Machinery instrument is usually
Contact measurement, operation is slow, contact force size influences the precision detected.The precision of ultrasound examination is low, is easy by timber line
The influence of reason and humidity etc..
So far, relevant patent and paper without reference to using line focus light source and line scan camera imaging,
Detect the machine vision device of household slab geomitry size.Since the color of household plate surface, texture, pattern, mark and surface lack
Sunken interference, the household plate picture contrast that existing machine vision device obtains is low, noise is big, the geometric elements such as hole, slot without
The accurate Ground Split of method, identification and measurement.Currently, the geometric dimension measurement of various household plates remain in the manual stage, can not
It is completed with machine vision technique, can not meet the requirement of high speed on-line checking and complete detection.
The embodiment of the present application using line focus light source and line scan camera imaging technique eliminate color, texture, pattern,
The interference of mark and surface defect etc. to the detection of household board size improves the picture contrast of geometric element and clear-cut
Degree provides one kind non-contactly high speed, the machine vision device of accurately measure household slab geomitry size.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of machine vision device for measuring household board size.Including：
Equipment is controlled, the speed detected for control device simultaneously handles image data；
The conveyer belt being connect with the control equipment, for transmitting household plate to be measured；
With it is described transmission band connection grating encoder, for monitor household plate to be detected transmission speed and according to its speed
Degree variation sends sampling pulse to line scan camera；
With the line focus light source of the transmission band connection, required illumination is imaged for providing for household plate to be measured；
The line scan camera being connect with the control equipment and grating encoder, for obtaining the household plate to be measured
Digital picture；
In use, the conveyer belt conveys household plate to be measured, the line focus light source irradiation with stable speed
Household plate to be measured, the line scan camera obtain under line focus light source irradiation according to the sampling pulse that encoder issues
The digital picture of the household plate to be measured is taken, and described image data are sent to the control equipment and are handled, the control
Equipment controls the dispensing rhythm of household plate according to the length of household plate to be measured and handles the digitized map that the line scan camera is sent
Picture, the size for calculating household plate.
Optionally, the conveyer belt can be extended to joint setting the first conveyer belt and the second conveyer belt, described first
Lower surface imaging gap is provided between conveyer belt and the second conveyer belt；When detection, the household plate to be measured is from described first
Conveyer belt is imaged gap by the lower surface and is moved to second conveyer belt；
The line scan camera and the line focus light source can be extended to the upper table being arranged in above the conveyer belt
Face imaging unit and the lower surface imaging unit being arranged in below the conveyer belt；In upper and lower two imaging units, line scanning
The mutual alignment of camera and line focus light source and they be equal to this patent right relative to the positional relationship of conveyer belt and want
Seek relationship described in 4 and claim 5；The upper surface imaging unit is used to acquire the upper surface of the household plate to be measured
Image, the lower surface imaging unit are used to acquire the lower surface image of the household plate to be measured.
By the way that upper and lower imaging unit is arranged, the image of household plate upper and lower surfaces can be disposably obtained, the machine is reduced
The space occupied of device sighting device improves detection efficiency.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
To enable claim of the invention, technical characteristic and methods for using them to be clearer and more comprehensible, special embodiment below, and
Cooperate Detailed description of the invention as follows.
Fig. 1 is the schematic diagram of the machine vision device of measurement household plate upper surface size provided in an embodiment of the present invention.
Fig. 2 be another embodiment of the present invention provides while measure household plate upper and lower surfaces size machine vision device
Schematic diagram.
Icon：The machine vision device of 10- measurement household board size；100- controls equipment；200- line focus light source；
The linear focused light source of 210- first；220- the second line focus light source；300- line scan camera；The first line scan camera of 310-；
The second line scan camera of 320-；400- conveyer belt；The first conveyer belt of 410-；The second conveyer belt of 420-；500- grating encoder；
The first grating encoder of 510-；20- household plate to be measured.
Specific embodiment
In the description of the present invention, similar label and letter indicate similar terms in following attached drawing.Therefore, once certain
One is defined in an attached drawing, then does not need that it is further defined and explained in subsequent attached drawing.Meanwhile
In description of the invention, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply opposite
Importance.
In description of the invention, it should be noted that the orientation or position of the instructions such as term " on ", "lower", "inner", "outside"
Relationship is to be based on the orientation or positional relationship shown in the drawings or orientation or position that when invention product use usually visits
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore limitation of the invention cannot be construed to.
In description of the invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ", " peace
Dress ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be and be directly connected to, be also possible to be indirectly connected with by intermediary, it can be with
It is the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood as the case may be
The concrete meaning of language in the present invention.
Fig. 1 is the structural schematic diagram of the machine vision device 10 of measurement household board size provided in an embodiment of the present invention, packet
It includes：Control equipment 100, line focus light source 200, line scan camera 300, conveyer belt 400, grating encoder 500.
The conveyer belt 400 is connect with control equipment 100, for transmitting household plate 20 to be measured；
The grating encoder 500 is pressed on the upper surface of conveyer belt 400 and connect with line scan camera 300, for real
When monitor household plate 20 to be measured transmission speed and according to its velocity variations to line scan camera 300 send sampling pulse；
The line focus light source 200 is connect with the conveyer belt 400, for providing illumination for household plate 20 to be measured；
The line scan camera 300 is connect with the conveyer belt 400 and the control equipment 100, for obtain it is described to
Measure the image data of household plate 20.
In use, the conveyer belt 400 conveys household plate 20 to be measured, the grating encoder 500 in preset speed
The transmission speed of real-time monitoring household plate 20 to be measured simultaneously sends sampling pulse to line scan camera 300；The line focus light
Household plate 20 to be measured is irradiated in source 200, and the line scan camera 300 is under the irradiation of the line focus light source 200 according to light
The pulse that grid encoder 500 issues obtains the digital picture of the household plate 20 to be measured, and described image data are sent to
The control equipment 100 is handled.
In the present embodiment, the conveyer belt 400 is with household to be measured plate 20 described in pre-set velocity horizontal transport；The light
The measurement wheel of grid encoder 500 snugly fits to the upper surface of conveyer belt 400, the rotation of the measurement wheel of grating encoder 500
Linear velocity is consistent with the linear velocity of the conveyer belt 400；The line scan camera 300 is mounted on the top of the conveyer belt 400,
The first preset space is arranged in the upper surface of the line scan camera 300 and the conveyer belt 400；The line focus light source 200
It is mounted on the top of the conveyer belt 400, the upper surface setting second of the line focus light source 200 and the conveyer belt 400
Preset space, second preset space are not less than the thickness of the household plate 20 to be measured.
The pre-set velocity can be arranged in those skilled in the art as desired.
In the present embodiment, the measurement wheel of the grating encoder 500 is close to the upper surface of the conveyer belt 400, the biography
Send band 400 without slippingly driving the measurement wheel of the grating encoder 500 to rotate, the pulse that the grating encoder 500 issues
It is sent to the line scan camera and excites its sampling.
Further, the line focus light source 200 and line line scan camera 300 are relative to where household plate 20 to be measured
Plane is installed with certain tilt angle.
In the present embodiment, the line scan camera 300 is mounted on 400 top of conveyer belt with preset tilt angle, at
As line is perpendicular to the direction of motion of conveyer belt.
Further, the illuminated line of the line focus light source 200 and the scan line of line scan camera 300 are perpendicular to transmission
With 400 the direction of motion and intersect at the upper surface of household plate 20 to be measured.
In the present embodiment, the illuminated line of the line focus light source 200 is vertical with the direction of motion with conveyer belt and with one
Fixed tilt angle is irradiated to the upper surface of household plate 20 to be measured.
In this implementation, the line focus light source 200 can be LED line light source, fiber line light source or other linear poly-
Any one or more in burnt light source.
In the present embodiment, the control equipment 100 can be any group of computer or microprocessor or PLC or three
It closes；The placement interval time of household plate is controlled according to the length of household plate to be detected, and is handled image and obtained each geometry of household plate
The size of element.
In the present embodiment, the control equipment 100 is controlled according to the length and data handling duration of household plate 20 to be measured
The release time interval of household plate, and control 400 speed of conveyer belt and the line scan camera 300, processing image data
And obtain the size of each geometric element of household plate.
In the present embodiment, as shown in Figure 1, the conveyer belt 400 may include making household plate 20 single side or preceding to be measured
While alignment while lean on guiding device or centering guiding device；The driving shaft of the feed belt passes through servo electricity by control equipment
Machine driving.
Fig. 2 is the knot of machine vision device provided in an embodiment of the present invention while measuring household plate upper and lower surfaces size
Structure schematic diagram.In the present embodiment, the transmission mechanism be extended to same axis, same to width, in the same direction, transmit at the same speed first transmission
Band 410 and the second conveyer belt 420, combine between first conveyer belt 410 and the second conveyer belt 420 be provided with lower surface at
As gap；When detection, gap movement is imaged by the lower surface from first conveyer belt 410 in the household plate 20 to be measured
To second conveyer belt 420.
In the present embodiment, the line scan camera 300 and the line focus light source are extended to setting and pass described first
410 top of band, the upper surface imaging unit being made of the first line scan camera 310 and the first linear focused light source 210 are sent, and
It is arranged in below lower surface imaging gap and is made of down the second line scan camera 320 and the second line focus light source 220
Surface imaging unit, the upper surface imaging unit is used to acquire the image of 20 upper surface of household plate to be measured, under described
Surface imaging unit is used to acquire the image of 20 lower surface of household plate to be measured.
Further, in the upper surface imaging unit, first line scan camera 310 is with scheduled angle tilt
It is mounted on the top of the first conveyer belt 410；In the lower surface imaging unit, second line scan camera 320 is with predetermined
Angle tilt be mounted on lower surface imaging gap lower section；First line scan camera 310 and the second line scan camera 320
Imaging line be each perpendicular to the direction of motion of the first conveyer belt 410 and the second conveyer belt 420, and intersected at line focus light source
The upper surface or lower surface of the household plate 20 to be measured.
Further, in the upper surface imaging unit and lower surface imaging unit, the first linear focused light source
210 and second line focus light source 220 illuminated line and the direction of motion of band the first conveyer belt 410 and the second conveyer belt 420 hang down
Directly and at an angle intersect respectively with the upper surface of detected household plate 20 or lower surface；The first line focus light
Source 210 and the second line focus light source 220 can be in LED line light source, fiber line light source or other line focus light sources
Any one or more.
Further, in the upper surface imaging unit and lower surface imaging unit, first grating encoder 510
The upper surface for snugly fitting to the first conveyer belt 410 and the second conveyer belt 420 monitors the speed of conveyer belt and scans to First Line
Camera 310 and the second line scan camera 320 send sampling pulse.
Rest part about the present embodiment can be with reference to the description in previous embodiment, and details are not described herein.
Attached drawing illustrates only certain embodiments of the present invention, therefore is not construed as the restriction to range.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention.For the skill of this field
For art personnel, the present invention can have various details to change and change.It is all made any within claim of the invention
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.Therefore, protection scope of the present invention should be with
Subject to the scope of protection of the claims.
Claims (8)
1. a kind of machine vision device for measuring household board size, which is characterized in that including：
Equipment is controlled, the speed detected for control device simultaneously handles image data；
The conveyer belt being connect with the control equipment, for transmitting household plate to be measured；
With it is described transmission band connection grating encoder, for monitor household plate to be detected transmission speed and according to its speed become
Change to line scan camera and sends sampling pulse；
With the line focus light source of the transmission band connection, required illumination is imaged for providing for household plate to be measured；
The line scan camera being connect with the control equipment and grating encoder, for obtaining the number of the household plate to be measured
Image；
In use, the conveyer belt conveys household plate to be measured with stable speed, the line focus light source irradiation is to be measured
Household plate is measured, the line scan camera obtains institute according to the sampling pulse that encoder issues under line focus light source irradiation
The digital picture of household plate to be measured is stated, and described image data are sent to the control equipment and are handled, the control equipment
The dispensing rhythm of household plate is controlled according to the length of household plate to be measured and handles digital picture, meter that the line scan camera is sent
Calculate the size of household plate.
2. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the conveyer belt is with pre-
If household plate to be measured described in speed horizontal transport；
The measurement wheel of the grating encoder snugly fits to the upper surface of conveyer belt, the rotation of the grating encoder measurement wheel
Linear velocity is consistent with the linear velocity of the conveyer belt；
The line scan camera is mounted on the top of the conveyer belt, and the upper surface of the line scan camera and the conveyer belt is set
Set the first preset space；
The line focus light source is mounted on the top of the conveyer belt, the upper table of the line focus light source and the conveyer belt
The second preset space is arranged in face, and second preset space is not less than the thickness of the household plate to be measured.
3. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the grating encoder
Measurement wheel be close to the upper surface of the conveyer belt, the conveyer belt is rotated without slippingly driving the measurement of the grating encoder
Dynamic, the pulse that the grating encoder issues is sent to the line scan camera and it excites it to complete primary sampling.
4. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the line scan camera
It is mounted on above conveyer belt with preset tilt angle, the direction of motion of the imaging line perpendicular to conveyer belt.
5. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the line focus light
The illuminated line in source is vertical with the direction of motion with conveyer belt and the upper table of detected household plate is irradiated to certain tilt angle
Face.
6. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the line focus light
Source can be any one or more in LED line light source, fiber line light source or other line focus light sources.
7. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the control equipment can
To be any combination of computer or microprocessor or PLC or three；Household plate is controlled according to the length of household plate to be detected
Interval time is placed, and handles the size that image obtains each geometric element of household plate.
8. the machine vision device of measurement household board size as described in claim 1, which is characterized in that the control equipment root
According to the release time interval of length and data handling duration the control household plate of household plate to be detected, and control the transmission belt speed
Degree and the line scan camera, the size for handling image data and obtaining each geometric element of household plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533973.XA CN108917594A (en) | 2018-05-29 | 2018-05-29 | A kind of machine vision device measuring household board size |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533973.XA CN108917594A (en) | 2018-05-29 | 2018-05-29 | A kind of machine vision device measuring household board size |
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| CN108917594A true CN108917594A (en) | 2018-11-30 |
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| CN201810533973.XA Pending CN108917594A (en) | 2018-05-29 | 2018-05-29 | A kind of machine vision device measuring household board size |
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Cited By (5)
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| CN109682309A (en) * | 2018-12-21 | 2019-04-26 | 北京安视中电科技有限公司 | Black crystal panel mechanical parameter intelligent device for measuring and method based on machine vision |
| CN110017783A (en) * | 2019-05-20 | 2019-07-16 | 广东理工学院 | Plate is displaced on-line measuring device and conveyer system |
| CN110154190A (en) * | 2019-05-15 | 2019-08-23 | 索菲亚家居湖北有限公司 | A kind of household plate production line and detection method with online vision-based detection function |
| CN110530265A (en) * | 2019-09-26 | 2019-12-03 | 广东理工学院 | One kind passing through formula board dimensions detection device |
| CN112284274A (en) * | 2020-10-22 | 2021-01-29 | 西北工业大学 | Method and system for detecting aperture and nest diameter of mechanical connecting hole |
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| CN112284274A (en) * | 2020-10-22 | 2021-01-29 | 西北工业大学 | Method and system for detecting aperture and nest diameter of mechanical connecting hole |
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