CN109387331A - Method, equipment and system for detecting heat sealing defects - Google Patents
Method, equipment and system for detecting heat sealing defects Download PDFInfo
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- CN109387331A CN109387331A CN201710820975.2A CN201710820975A CN109387331A CN 109387331 A CN109387331 A CN 109387331A CN 201710820975 A CN201710820975 A CN 201710820975A CN 109387331 A CN109387331 A CN 109387331A
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- 230000007547 defect Effects 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000007789 sealing Methods 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 33
- 230000005855 radiation Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 66
- 238000012797 qualification Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920006254 polymer film Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000001497 healthy food Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Radiation Pyrometers (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A method, apparatus and system for detecting heat seal defects, the apparatus comprising: a high frequency generator for applying a high frequency to a position of the metal film covering the port of the container; an infrared camera for sensing infrared radiation above the container to generate temperature data of each part of the container; a processing device for receiving the temperature data; converting the temperature data into an image; positioning the image to define a region of interest; calculating the continuous area occupied by the temperature out of a qualified temperature range in the interested area of the image; calculating the continuous area, and judging whether to indicate a sealing defect according to the calculation result; and an output device for indicating the sealing defect.
Description
Technical field
This announcement is related to a kind of detection technique, particularly relevant a kind of method, equipment and the system of detection heat seal defect.
Background technique
In terms of the heat seal defect of detection container, the prior art generally uses infrared sensor to sense sealing part
The mean temperature of local temperature or entire sealing area, and judge that this temperature whether within the scope of normal temperature, is sentenced according to this
It is disconnected to whether there is seal defect.Another prior art obtains the thermal image of container using infrared imaging instrument, and for close
The region (such as cut) of envelope defect calculates its mean temperature, by itself and a threshold value comparison, determines the sealing characteristics of container according to this.
However, above-mentioned, usually the temperature because of normal region takes part in temperature computation in the prior art, so that testing result is often not
Accurately.
Therefore, it is necessary to a kind of new detection technique be proposed, to improve the missing of the above-mentioned prior art.
Summary of the invention
Method, equipment and the system for being designed to provide a kind of detection heat seal defect of this announcement, are lacked with lift-off seal
Fall into the accuracy of detection.
To reach above-mentioned purpose, on the one hand this announcement provides the method for a kind of detection heat seal defect, is applied to detection
The port of the sealing characteristics of the Single port of one container, the container is covered with a metallic film, and overlapped on the metallic film is had
One lid, the method include: the position of the metallic film covered on the port of the corresponding container applies high frequency；Utilize one
Infrared pick-up device senses infrared radiation above the container, to generate the temperature data of the container each section；By the container
The temperature data of each section is converted into an image of the container；The image of the container is positioned, it is interested to define one
Region (region of interest, ROI)；The temperature not in a qualified temperature range is calculated, in the interested of the image
Shared continuous area in region；And the continuous area is calculated, and according to calculated result, judge whether that instruction one is close
Seal defect.
On the other hand this announcement provides a kind of equipment of detection heat seal defect, be applied to the Single port of one container of detection
Sealing characteristics, the port of the container covers with a metallic film, and overlapped on the metallic film has a lid, the equipment
Include: a high frequency generator, the position of the metallic film covered on the port to the corresponding container apply high frequency；One
Infrared pick-up device, to sense infrared radiation above the container after the high frequency generator applies the high frequency, with
Generate the temperature data of the container each section；One processing unit is coupled with the infrared pick-up device, is taken the photograph to receive the infrared ray
The temperature data generated as device；The temperature data of the container each section is converted into an image of the container；To the container
Image is positioned, to define an area-of-interest (region of interest, ROI)；It calculates not in a qualified temperature
Temperature in range, the shared continuous area in the area-of-interest of the image；The continuous area is calculated, and according to
Calculated result judges whether to indicate a seal defect；And an output device, it is coupled with the processing unit, to indicate that this is close
Seal defect.
This announcement another further aspect provides a kind of system of detection heat seal defect, is applied to the Single port of one container of detection
Sealing characteristics, the port of the container covers with a metallic film, and overlapped on the metallic film has a lid, the system
Include: a high frequency generator is set on a production line, has a conveyer belt on the production line, this is used for conveyer belt with conveying
Several are equipped with the container of the metallic film He the lid, which covers on the port to each container of correspondence
The position of the metallic film of lid applies high frequency；One infrared pick-up device, to apply the high frequency in the high frequency generator
Afterwards, infrared radiation is sensed above each container, to generate the temperature data of each container each section；One processing unit, with
Infrared pick-up device coupling, to receive the temperature data of infrared pick-up device generation；By the temperature of the container each section
Degree is according to the image for being converted into the container；The image of the container is positioned, to define an area-of-interest (region
of interest,ROI)；The temperature not in a qualified temperature range is calculated, it is shared in the area-of-interest of the image
Continuous area；The continuous area is calculated, and according to calculated result, judges the container with the presence or absence of a seal defect；
And one remove device, couples with the processing unit, to respond the processing unit judge the container there are the seal defect,
And the container is removed from the conveyer belt.
In the method, apparatus and system of the detection heat seal defect of this announcement, defects detection is carried out for area-of-interest,
And the not continuous area shared by the temperature in qualified temperature range is calculated, according to its calculated result, is judged whether
There are seal defects.Since the Temperature Distribution of seal defect is tracked in this announcement using continuous area, to the temperature number of the container
According to analysis it is more accurate, can close to the form of expression of seal defect, therefore compared to existing seal defect detection mode,
It can be derived that and more accurately detect as a result, will not therefore reduce detection speed simultaneously.
For the above content of this announcement can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate institute's accompanying drawings, makees
Detailed description are as follows:
Detailed description of the invention
Fig. 1 shows the schematic diagram of a container.
Fig. 2 shows the system for heating seal defect according to a kind of detection of this announcement embodiment.
Fig. 3 shows the method for heating seal defect according to a kind of detection of this announcement embodiment.
The method that Fig. 4 shows another detection heat seal defect according to this announcement embodiment.
Fig. 5 A and Fig. 5 B show the image there is no seal defect.
There are the images of seal defect for Fig. 6 A to Fig. 6 C display.
Fig. 7 shows the schematic diagram that area-of-interest is labeled in the image according to a container of this announcement embodiment.
Fig. 8 shows the signal that another area-of-interest is labeled in the image according to a container of this announcement embodiment
Figure.
Fig. 9 is shown according to the schematic diagram for being divided into several unit areas in this announcement embodiment to area-of-interest.
Specific embodiment
It is right as follows in conjunction with drawings and embodiments to keep the purpose, technical solution and effect of this announcement clearer, clear
This announcement is further described.It should be appreciated that specific embodiment described herein is only to explain that this announcement, this announcement are said
The word " embodiment " used in bright book means serving as example, example or illustration, is not used to limit this announcement.In addition, originally taking off
Show that the article " one " used in specification and appended can generally be interpreted to mean " one or more ", removes
It is non-in addition to specify or understand determining singular from context.
The technology of detection heat seal defect is applied to the heat seal for making metallic film heat with high frequency in this announcement
Situation under.Referring to Fig. 1, it shows the schematic diagram of a container.In general, it in heat seal technology, is being heated seal
Movement before, the port 12 of container 11 with 13 covering of a metallic film (generally using aluminium film), attached on the inside of lid 14 one every
Lid 14 is screwed on from the port of container 11 12, then container 11 is sent on production line by hot paper 15, applies high week to container 11
Wave, high frequency to generate eddy current (eddy current) on metallic film 13 and heat, this heat make metallic film 13
On glue melt, so that metallic film 13 can adhere on the port 12 of container 11.
Specifically, in an actual example, the lower surface of metallic film 13 coats one layer of polymeric film
(polymer film) (not shown), upper surface coat coating of wax (not shown).When lid 14 screws on, sheathing paper 15 passes through
The wax being extruded is attached on metallic film 13.Metallic film 13 is by high frequency and when heat, above wax melt, metal foil
Film 13 is detached from from sheathing paper 15 to the movement of the port of container 11 12, and thin polymer film below becomes fluid, flows to port
At 12, so that by the sticking thin polymer film of the tool, metallic film 13 can be sealed the port 12.
In general, drug, healthy food or to the more demanding article of sealing characteristics can use this sealing means, this
The type for disclosing the article being not limited in container, is also not limited to the various configurations of container, as long as with high frequency into
The thermosealed technology of row, all in the range of this announcement is intended to protection.
Referring to Fig. 2, its display heats seal the system 20 of defect, this system according to a kind of detection of this announcement embodiment
20 are set on the heat seal production line of container 11.As shown in Fig. 2, there is a conveyer belt 21, if being used to convey on production line
Dry container 11, these containers 11 have been equipped with metallic film 13 and lid 14 shown in FIG. 1, it is, metallic film 13 covers
It covers in the port of container 11 12, container 11 and after screwing on lid 14, these containers 11 are placed on conveyer belt 21, and along figure
Arrow direction shown in 2 is transported.
System 20 further includes a high frequency generator 22, an infrared pick-up device 23, a processing unit 24, an output device
(such as a display 25) and removal device 26.Firstly, container 11, by high frequency generator 22, high frequency generator 22 is right
Container 11 applies high frequency, specifically, the metal foil covered on the port 12 of the corresponding each container 11 of high frequency generator 22
The position of film 13 applies high frequency.The high frequency of application to generate eddy current on metallic film 13, heat and release infrared ray
Radiation.
After container 11 is applied high frequency soon, container 11 enters the visual field (the field of of infrared pick-up device 23
View), the infrared pick-up device 23 above container 11 senses the infrared radiation that container 11 is released, and it is each to generate container 11
Partial temperature data.The configuration of infrared pick-up device 23 is it is found that the temperature data master that infrared pick-up device 23 obtains from Fig. 2
If being contributed by the entire plane of metallic film 13.
Processing unit 24 and infrared pick-up device 23 couple, and the temperature data that infrared pick-up device 23 generates is sent to place
Manage device 24.The temperature data can be converted into image data by processing unit 24, and carry out image procossing, place to the image data
Image after reason can be displayed on display 25.Processing unit 24 can also be heated seal according to the image of acquirement to determine whether existing
Defect, such as metallic film 13 does not paste and the cut that occurs, the result of detection also can be displayed on display 25.
When detection is there are when heat seal defect, processing unit 24 can issue alarm signal, and the output device is notified to send out
It warns out, such as shows warning message etc. on sending caution sound, display 25, processing unit 24 also can control shifting coupled with it
Except device 26, there will be the container 11 of heat seal defect to remove from conveyer belt 21.For example, it is moveable with one to remove device 26
Arm can be controlled by processing unit 24, and when the arm stretches out, which touches container 11, so that container 11 is pushed away into conveyer belt 21,
Fall to a poor sealing collecting region.
Referring to Fig. 3, the method that its display heats seal defect according to a kind of detection of this announcement embodiment.In processing unit
In the 24 heat seal detections carried out, this announcement improves existing detection mode, and accuracy in detection can be promoted by proposing one kind
Heat seal defect inspection method.Fig. 2 please be cooperate refering to Fig. 3, the method for the detection heat seal defect of this announcement includes the following steps.
Step S31: the position of the metallic film 13 covered on the port 12 of the corresponding container 11 applies high frequency.Herein
In step, high frequency generator 22 generates high frequency, and is applied on container 11, the high frequency of generation be focus on container 11 it
The metallic film 13 covered on port 12, thus 13 heat of metallic film and release infrared radiation.
Step S32: infrared radiation is sensed above the container 11 using an infrared pick-up device 23, to generate the container
The temperature data of 11 each sections.In this step, container 11 is moved to by conveyer belt 21 from the position of high frequency generator 22
The lower section of infrared pick-up device 23, into the visual field of infrared pick-up device 23, infrared pick-up device 23 senses container 11 at this time
The infrared radiation of releasing, and the temperature data of 11 each section of container is generated, since metallic film 13 is a heat source, this temperature number
According to mainly being contributed by metallic film 13, and because sensing angle configuration, infrared pick-up device 23 can sense metallic film
The temperature of 13 entire planes.
Step S33: the temperature data of the container each section is converted into an image of the container.Processing unit 24 receives red
The temperature data that outside line image pick-up device 23 generates, and the temperature data is converted into image, it in the process, can also be to the temperature
Data are filtered, and obtained image further progress image procossing to optimize the image, or can also be simplified the image, be made
It obtains processing speed to accelerate, on subsequent defective detects, can achieve the effect that detect immediately.
Step S34: positioning the image of the container, to define an area-of-interest (region of
interest,ROI).In general, the region major part situation for heat seal defect occur is fixed, using this characteristic,
It is being detected using image, these regions can be oriented, only seeing the Temperature Distribution in these regions, that is, can reach accurately
Detection, can also effectively shorten defects detection the time it takes in this way.In terms of accuracy, these regions are only detected, can also be kept away
The regional effect of defect can not be occurred by other by exempting from temperature data, and reduce accuracy.For example, the port 12 of container 11
Place Chang Yin is not sealed and heat seal defect occurs, at this moment can detecte the region around port 12.
Step S35: the temperature not in a qualified temperature range, the shared company in the area-of-interest of the image are calculated
Continuous area.In general, if sealing really, uniform state can be presented in the Temperature Distribution of metallic film 13, if sealing it is uncertain and
There is cut, because of the situation that dissipation of heat, temperature can decreased significantly at cut, and makes the Temperature Distribution of metallic film 13
It is unequal.If without heat dissipation, the temperature of 13 each section of metallic film substantially can position in a temperature range, that is, qualified temperature
Spend range.If there is cut, hot flowing, so that some the local temperature of metallic film 13 are lower, and small part range temperature liter
It is high.In this step, it is analyzed, is calculated not in qualified temperature range by the area-of-interest of the image to the container 11
Temperature shared by continuous area, can judge to whether there is seal defect.For example, conjunction is caught by test several times
Lattice temperature range is, for example, 33 to 40 DEG C, and continuous surface shared by 33 DEG C or less and 40 DEG C or more of temperature at this moment can be calculated
Product.In another embodiment, its continuous area can also be calculated for each temperature range, after rejecting possible noise, then will
Effectively continuous area aggregation.For example, the case where being directed to low temperature, 33 DEG C to 32 DEG C calculate its continuous area, 32 DEG C to 31 DEG C meters
Calculate its continuous area, and so on to a certain setting low-temperature values；The case where for high temperature, 40 DEG C to 41 DEG C calculate its continuous surface
Product, 32 DEG C to 31 DEG C calculate its continuous area, and so on to a certain setting high temperature values.Low temperature condition can also be done with single needle
Defect dipoles, single needle does a defect dipoles to high-temperature condition, or high temperature is added with the continuous area of low temperature condition,
Make defect dipoles together.
Step S36: judge whether the continuous area is greater than an area threshold.In this step, one can be obtained by test
Area threshold, judgement benchmark whether as heat seal defect.When the continuous area that step S35 is obtained is greater than the area threshold
When, judge there is heat seal defect；And when the continuous area that step S35 is obtained is less than or equal to the area threshold, judgement
There is no heat seal defects out.
Step S37: indicating a seal defect, to respond the case where continuous area is greater than the area threshold.Work as step
S36 judges there are when seal defect, the exportable indication signal of processing unit 25 to output device.Output device can be display
Device 25 can show the message for seal defect occur on the screen.Output device also can be a loudspeaker, there are seal defects
When, capable of emitting caution sound.Processing unit 25 also can control output device (such as removing device 26), lack it by there is sealing
Sunken container 11 is removed from conveyer belt 21.
Referring to Fig. 4, method of its display according to another detection heat seal defect of this announcement embodiment.Fig. 4 is shown
Detection heat seal defect method in, step S41 to step S45 is same or like to step S35 with the step S31 in Fig. 3,
It specifically can refer to the related description of above-mentioned steps S31 to step S35.
Step S46: the standard deviation and the standard deviation of the area-of-interest or the area-of-interest for calculating the continuous area are gone
Except a difference of the standard deviation in the region after the continuous area.In this step, the continuous area and the region of interest can be calculated
The difference of both standard deviations of color range in domain can also calculate the continuous area and after the area-of-interest removes the continuous area
Both standard deviations of color range in region difference.
Step S47: according to the size of the difference, judge whether to indicate the seal defect.In this step, it can be determined that should
Whether difference is greater than a threshold value, if so, there are seal defects for judgement.The difference of the two standard deviation is bigger, indicates two blocks
Temperature difference is larger, and expression is implicitly present in seal defect；The difference of the two standard deviation is smaller, indicate two blocks temperature difference compared with
It is small, indicate that seal defect may be not present.
In embodiment shown in Fig. 4, using in the calculation of standard deviation, the benchmark compared is the standard deviation of continuous area
With the standard deviation of area-of-interest (or the area-of-interest remove the region after the continuous area standard deviation), due to its with from
The image of body compares, and makees to sentence compared to using a fixed threshold value (area threshold in embodiment as shown in Figure 3)
Disconnected, the image change of itself is contemplated in this mode, and accuracy is obviously promoted.
The embodiment of above-mentioned Fig. 3 and the embodiment of Fig. 4 can be individually performed to determine whether there are seal defects.In another
In embodiment, first the continuous area can also be compared with an area threshold, reject the lesser region of continuous area, and it is laggard
Row standard deviation compares, in this way and feasible.
In the method for the detection heat seal defect of this announcement, defects detection is carried out for area-of-interest, and judge not
The continuous area shared by the temperature in qualified temperature range whether be greater than the standard deviation of area threshold and/or the continuous area with
The standard deviation of the area-of-interest or the area-of-interest remove the size of the difference of the standard deviation in the region after the continuous area,
To judge whether there is seal defect.Since the Temperature Distribution of seal defect is tracked in this announcement using continuous area, to this
The analysis of the temperature data of container is more accurate, can be close to the form of expression of seal defect, therefore compared to existing sealing
Defects detection mode can be derived that and more accurately detect as a result, will not therefore reduce detection speed simultaneously.
As what is illustrated, Fig. 5 A and Fig. 5 B show the image there is no seal defect, and Fig. 6 A to Fig. 6 C display exists
The image of seal defect.The sealing of the image middle port 12 of Fig. 5 A and Fig. 5 B is all deposited in Fig. 6 A to Fig. 6 C really without cut
In apparent cut, that is, it is classified as seal defect.
The step of temperature data is converted into image (i.e. above-mentioned steps S33 and S43) may include following steps: by the temperature
Temperature is higher than the data of one first temperature in data, is indicated with one first pixel value；By temperature in the temperature data lower than one the
The data of two temperature are indicated with one second pixel value；And by temperature in the temperature data between first temperature and this second
Data between temperature are indicated with different pixel value.That is, the temperature data that can be obtained to infrared pick-up device 23
It is filtered.The image can be realized as such as RGB color rank or use grayscale.For example with RGB color rank, temperature in the temperature data
Data point higher than 45 DEG C can indicate that temperature is lower than the data point of 30 DEG C of degree in the temperature data with deep red, can be with black table
Show, temperature is then indicated with different rgb pixel values between 30 DEG C to 45 DEG C of data point.Carry out temperature data filtering benefit be
The temperature in this temperature range may all not be judged as defect, and defect is indicated with identical pixel value, can more be highlighted
The form of defect, while image is also simplified, simplify subsequent image analysis.
Referring to Fig. 7, being labeled with area-of-interest in its image of display according to a container of this announcement embodiment
Schematic diagram.It is assumed that the port 12 of container 11 is circle, lid 14 is also round situation, and the region around port 12 can be made
For area-of-interest, therefore the step of defining the area-of-interest (i.e. above-mentioned steps S34 and S44) may include following steps:
A central point O is defined in the image of the container 11；It is radius by the center of circle, one first radius value R1 of central point O, defines
One first is round；Using central point O as the center of circle, one second radius value R2 is radius, defines one second center of circle；And by this
The one round region between second circle, is defined as the area-of-interest, such as the hatched example areas in Fig. 6.Due to port 12
Around be usually region that seal defect occurs, therefore can be detected using the region as area-of-interest, wherein the first half
Diameter R1 can be defined by the internal diameter of the port 12 of container 11, and the second radius R2 can be defined by the outer diameter of lid 14, with common
Image algorithm can find out the center of circle, the area-of-interest can be defined whereby.
The step of calculating the continuous area (i.e. above-mentioned steps S35 and S45) may include following steps: calculate not in the qualification
One first temperature range in temperature range, the first shared continuous area in the area-of-interest of the image；Calculating does not exist
A second temperature section in the qualification temperature range, the second shared continuous area in the area-of-interest of the image；With
And using the sum of the first continuous area and the second continuous area as the continuous area.That is, as exemplified above, if closing
Lattice temperature range is 33 to 40 DEG C, and 33 DEG C to 32 DEG C can be used as the first temperature range, and 32 DEG C to 31 DEG C can be used as second temperature area
Between, their continuous area is added as the continuous area in step S35 and S45.In another embodiment, can also singly it judge
Whether the continuous area of a certain temperature range is greater than area threshold, to determine whether there are seal defects.
The step of calculating the continuous area (i.e. above-mentioned steps S35 and S45) may include following steps: will not be in the qualification temperature
Temperature in degree range is divided into several temperature ranges；It is shared in the area-of-interest of the image to calculate each temperature range
Continuous area；Judge whether continuous area shared by each temperature range is greater than a threshold value；Continuous area is removed less than the threshold
The corresponding temperature range of value；And be greater than the temperature range of the threshold value for continuous area, to the continuous area shared by it into
Row aggregation.It,, can be with when may be noise when the corresponding continuous area of a certain temperature range is too small that is, as exemplified above
It is rejected.It is equally possible that single judge that certain temperature ranges reject the continuous area being added after noise, judge whether it is big
In area threshold, to judge with the presence or absence of seal defect.
Referring to Fig. 8, it is interested to be labeled with another in its image of display according to a container of this announcement embodiment
The schematic diagram in region.During sealing, metallic film 13 may be put back with sheathing paper 15, and lead to different temperature point
Cloth, that is to say, that when metallic film 13 is placed in 15 top of sheathing paper, metallic film 13 generates temperature because not heat-insulated
Higher heat, this announcement can also detect this situation.
Firstly, during defining area-of-interest, the circle that port 12 can be formed as area-of-interest,
It may include following steps: defining a central point O in the image of the container 11；And make a reservation for by the center of circle, one of central point O
Radius value R1 is radius, defines a circle.Here, predetermined radii R1 can be defined by the internal diameter of port 12.
In this instance, seal defect context of detection may include following steps: calculate temperature corresponding to pixel in the circle
One mean temperature of degree evidence；Judge whether the mean temperature is greater than a threshold value；And indicate a seal defect, it is somebody's turn to do with responding
Mean temperature is greater than the case where threshold value.In this kind of detections, mean temperature can be used and calculated, this calculating
It can be reached by the way that the corresponding temperature of whole pixels in this area-of-interest to be averaged, can also be gone out from the angle of the gross area
Send calculating.Certainly, the temperature range mentioned above for not in qualified temperature range also can be used and calculate its continuous surface
Long-pending concept calculates.
Referring to Fig. 9, area-of-interest can be divided into several unit areas 90, if one of unit area exists
Seal defect then determines that there are seal defects for the container 11.As shown in figure 9, with a predetermined angular, by the region of interest regional partition
At 8 unit areas 90.Each unit area 90 is individually judged that there are seal defects if there is a unit area 90, i.e.,
It can determine that there are seal defects for the container 11.Fig. 3 and/or judgment mode shown in Fig. 4 can be used for each unit area 90.
With reference to the method and system of above-mentioned detection heat seal defect, this announcement simultaneously proposes that a kind of detection heats seal defect
Equipment, specific implementation can join the method and system of above-mentioned detection heat seal defect and repeat no more.
This announcement has used preferred embodiment disclosed above, and so it is not limited to this announcement, the neck of technology belonging to this announcement
Technical staff in domain may make various changes and modifications, therefore this announcement in the spirit and scope for not departing from this announcement
Protection scope when view those as defined in claim subject to.
Claims (21)
1. it is a kind of detection heat seal defect method, be applied to detection one container Single port sealing characteristics, the container it
Port is covered with a metallic film, and overlapped on the metallic film has a lid, which is characterized in that the method includes:
The position of the metallic film covered on the port of the corresponding container, applies high frequency；
Infrared radiation is sensed above the container using an infrared pick-up device, to generate the temperature number of the container each section
According to；
The temperature data of the container each section is converted into an image of the container；
The image of the container is positioned, to define an area-of-interest；
Calculate the temperature not in a qualified temperature range, the shared continuous area in the area-of-interest of the image；And
The continuous area is calculated, and according to calculated result, judges whether to indicate a seal defect.
2. the method for detection heat seal defect as described in claim 1, it is characterised in that: the metallic film includes an aluminium film.
3. the method for detection heat seal defect as described in claim 1, which is characterized in that by the temperature number of the container each section
Include according to the step of image for being converted into the container:
Temperature in the temperature data is higher than to the data of one first temperature, is indicated with one first pixel value；
Temperature in the temperature data is lower than to the data of a second temperature, is indicated with one second pixel value；And
By data of the temperature in the temperature data between first temperature and the second temperature, with different pixel value table
Show.
4. the method for detection heat seal defect as described in claim 1, which is characterized in that the continuous area is calculated,
And according to calculated result, judge whether that the step of indicating the seal defect includes:
Judge whether the continuous area is greater than an area threshold；And
The seal defect is indicated, to respond the case where continuous area is greater than the area threshold.
5. the method for detection heat seal defect as described in claim 1, which is characterized in that the continuous area is calculated,
And according to calculated result, judge whether that the step of indicating the seal defect includes:
It calculates the standard deviation of the continuous area and the standard deviation of the area-of-interest or the area-of-interest removes the continuous area
One difference of the standard deviation in region afterwards；And
According to the size of the difference, judge whether to indicate the seal defect.
6. the method for detection heat seal defect as described in claim 1, which is characterized in that the method further includes:
The area-of-interest is divided into several unit areas,
The temperature not in the qualification temperature range is wherein calculated, the shared continuous area in the area-of-interest of the image
Step includes:
Calculate the not temperature in the qualification temperature range, the continuous area shared by each unit area,
Wherein when one of unit area in these unit areas is judged as that there are seal defects, then determine that the container is deposited
In seal defect.
7. the method for detection heat seal defect as described in claim 1, which is characterized in that determine the image of the container
Position includes the step of the area-of-interest to define:
A central point is defined in the image of the container；
It is radius by the center of circle, one first radius value of the central point, defines one first circle；
Using the central point as the center of circle, one second radius value is radius, defines one second center of circle；And
By the first round region between second circle, it is defined as the area-of-interest.
8. the method for detection heat seal defect as described in claim 1, which is characterized in that calculate not in the qualification temperature range
Interior temperature, in the area-of-interest of the image the step of shared continuous area include:
Calculate one first temperature range not in the qualification temperature range, in the area-of-interest of the image shared by first
Continuous area；
Calculate a second temperature section not in the qualification temperature range, in the area-of-interest of the image shared by second
Continuous area；And
Using the sum of the first continuous area and the second continuous area as the continuous area.
9. the method for detection heat seal defect as described in claim 1, which is characterized in that calculate not in the qualification temperature range
Interior temperature, in the area-of-interest of the image the step of shared continuous area include:
Temperature not in the qualification temperature range is divided into several temperature ranges；
Calculate each temperature range continuous area shared in the area-of-interest of the image；
Judge whether continuous area shared by each temperature range is greater than a threshold value；
Continuous area is removed less than temperature range corresponding to the threshold value；And
It is greater than the temperature range of the threshold value for continuous area, the continuous area shared by it is added up.
10. the method for detection heat seal defect as described in claim 1, which is characterized in that determine the image of the container
Position includes the step of the area-of-interest to define:
A central point is defined in the image of the container；And
It is radius by the center of circle, a predetermined radii value of the central point, defines a circle；
And wherein the method further includes:
Calculate a mean temperature of temperature data corresponding to pixel in the circle；
Judge whether the mean temperature is greater than a threshold value；And
A seal defect is indicated, to respond the case where mean temperature is greater than the threshold value.
11. it is a kind of detection heat seal defect equipment, be applied to detection one container Single port sealing characteristics, the container it
Port is covered with a metallic film, and overlapped on the metallic film has a lid, which is characterized in that the equipment includes:
One high frequency generator, the position of the metallic film covered on the port to the corresponding container, applies high frequency；
One infrared pick-up device, to sense infrared ray above the container after the high frequency generator applies the high frequency
Radiation, to generate the temperature data of the container each section；
One processing unit is coupled with the infrared pick-up device, to receive the temperature data of infrared pick-up device generation；It will
The temperature data of the container each section is converted into an image of the container；The image of the container is positioned, to define one
Area-of-interest；Calculate the temperature not in a qualified temperature range, the shared continuous surface in the area-of-interest of the image
Product；The continuous area is calculated, and according to calculated result, judges whether to indicate a seal defect；And
One output device is coupled with the processing unit, to indicate the seal defect.
12. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: the metallic film includes an aluminium
Film.
13. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: be converted by the temperature data
During the image, the processing unit is also to the data that temperature in the temperature data is higher than to one first temperature, with one the
One pixel value indicates；Temperature in the temperature data is lower than to the data of a second temperature, is indicated with one second pixel value；And it will
Data of the temperature between first temperature and the second temperature, are indicated in the temperature data with different pixel value.
14. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: the processing unit further to
Judge whether the continuous area is greater than an area threshold；And indicate the seal defect, it is greater than this to respond the continuous area
The case where area threshold.
15. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: the processing unit further to
Calculate the standard deviation of the continuous area and the standard deviation of the area-of-interest or after the area-of-interest removes the continuous area
One difference of the standard deviation in region；And the size according to the difference, judge whether to indicate the seal defect.
16. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: the processing unit further to
The area-of-interest is divided into several unit areas；And the not temperature in the qualification temperature range is calculated, each
Continuous area shared by unit area, wherein when one of unit area in these unit areas is judged as the presence of sealing
Defect, then the processing unit determines the container there are seal defects.
17. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: defining the area-of-interest
In the process, the processing unit in the image of the container also to define a central point；Using the central point as the center of circle, one first
Radius value is radius, defines one first circle；Using the central point as the center of circle, one second radius value is radius, defines one the
Two centers of circle；And by the first round region between second circle, it is defined as the area-of-interest.
18. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: in the mistake for calculating the continuous area
Cheng Zhong, the processing unit are emerging in the sense of the image also to calculate one first temperature range not in the qualification temperature range
The first shared continuous area in interesting region；The second temperature section not in the qualification temperature range is calculated, in the image
Area-of-interest in shared the second continuous area；And by the first continuous area and the second continuous area and conduct
The continuous area.
19. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: in the mistake for calculating the continuous area
Cheng Zhong, the processing unit is also to be divided into several temperature ranges for the temperature not in the qualification temperature range；It calculates every
A temperature range continuous area shared in the area-of-interest of the image；Judge continuous area shared by each temperature range
Whether a threshold value is greater than；Continuous area is removed less than temperature range corresponding to the threshold value；And it is greater than for continuous area and is somebody's turn to do
The temperature range of threshold value adds up the continuous area shared by it.
20. the equipment of detection heat seal defect as claimed in claim 11, it is characterised in that: defining the area-of-interest
In the process, the processing unit in the image of the container also to define a central point；And using the central point as the center of circle, one
Predetermined radii value is radius, defines a circle, the processing unit and to calculate temperature corresponding to pixel in the circle
One mean temperature of data；And judge whether the mean temperature is greater than a threshold value, and the output device is to indicate that one is close
Defect is sealed, to respond the case where mean temperature is greater than the threshold value.
21. it is a kind of detection heat seal defect system, be applied to detection one container Single port sealing characteristics, the container it
Port is covered with a metallic film, and overlapped on the metallic film has a lid, which is characterized in that the system includes:
One high frequency generator is set on a production line, has a conveyer belt on the production line, if this is used for conveyer belt with conveying
Dry is equipped with the container of the metallic film He the lid, which covers on the port to each container of correspondence
Metallic film position, apply high frequency；
One infrared pick-up device, to be sensed above each container infrared after the high frequency generator applies the high frequency
Beta radiation, to generate the temperature data of each container each section；
One processing unit is coupled with the infrared pick-up device, to receive the temperature data of infrared pick-up device generation；It will
The temperature data of the container each section is converted into an image of the container；The image of the container is positioned, to define one
Area-of-interest；Calculate the temperature not in a qualified temperature range, the shared continuous surface in the area-of-interest of the image
Product；The continuous area is calculated, and according to calculated result, judges the container with the presence or absence of a seal defect；And
One removes device, couples with the processing unit, to respond the processing unit judge the container there are the seal defect,
And the container is removed from the conveyer belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106126792 | 2017-08-08 | ||
| TW106126792A TWI639823B (en) | 2017-08-08 | 2017-08-08 | Method, apparatus, and system for detecting thermal sealing defects |
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| Publication Number | Publication Date |
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| CN109387331A true CN109387331A (en) | 2019-02-26 |
Family
ID=65034192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710820975.2A Pending CN109387331A (en) | 2017-08-08 | 2017-09-13 | Method, equipment and system for detecting heat sealing defects |
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| Country | Link |
|---|---|
| CN (1) | CN109387331A (en) |
| TW (1) | TWI639823B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237600A (en) * | 2021-05-14 | 2021-08-10 | 山东瑞烨法兰有限公司 | Method for monitoring sealing performance of furnace door of heat treatment furnace |
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| Publication number | Publication date |
|---|---|
| TWI639823B (en) | 2018-11-01 |
| TW201910752A (en) | 2019-03-16 |
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Application publication date: 20190226 |