A kind of sealing propertytest system of aluminium foil blister packaging
Technical field
The invention patent relates to package encapsulation detection field, the sealing propertytest system of specifically a kind of aluminium foil blister packaging
System, including algorithm and its hardware corollary apparatus.
Background technique
It is a kind of mass defect for being difficult to be observed directly with eye that aluminum-plastic blister, which seals Air Leakage Defect, and this defect can make to wrap
The shelf effect of dress product substantially reduces, and leakproofness will directly affect the quality of product, or even due to product packaging improper failure
Influence the health of user.This requires carrying out gas leakage detection to aluminium-plastic bubble plate packing, but existing aluminium foil blister packs gas leakage
Defect detecting technique will cause waste, implement time-consuming work consuming, and the degree of automation is low, is no longer satisfied growth requirement.For
This, research is lossless, efficient aluminium foil blister leakproofness intelligent detecting method is imperative.
Traditional leak hunting method is that the blister package product that will be inspected by random samples immerses in coloured special liquid, is then imposed negative
Pressure judges gas leakage situation whether infiltration by observation colored liquid.It hunts leak in this way, first has to drip liquid
Capable person can judge whether there is Air Leakage Defect, and such time is longer, in addition itself the biggest problems are that examined product whether gas leakage
It will all discard, to cause very big waste.More advanced leak detector is to be placed in examined product in one closed container to add
It presses or vacuumizes, to determine whether there are gas leakage whether deformation by the aluminium foil surface of eye-observation blister package, this method is deposited
Deficiency be that human error is affected, and it is not intuitive as the result is shown.Therefore a kind of lossless, quick aluminium foil bubble is provided
The sealing propertytest system of cover packaging becomes urgent problem to be solved in the prior art.
Summary of the invention
A kind of sealing propertytest system of aluminium foil blister packaging, it is characterized in that the detection system by vacuum air-channel system,
Optical measuring system and data acquisition processing system composition,
The vacuum air-channel system includes seal cavity, vacuum pump, and relief valve, reversal valve and pressure sensor are described to change
Pass through pipeline respectively to valve to be connected with seal cavity, vacuum pump and relief valve, pressure sensor is also mounted at and seal cavity
On the pipeline being directly connected to, the seal cavity inner bottom surface is for placing aluminum-plastic blister to be detected, the top surface tool of seal cavity
There is the window using transparent material sealing,
The optical measuring system includes light source, light source controller, imaging sensor and bracket, and the light source and image pass
Sensor is mounted on that seal cavity is ipsilateral by bracket, the direction of illumination of light source and the shooting direction of imaging sensor and seal cavity
The angle of inner bottom surface is 45-60 °;The light source controller is connected with light source and controls the brightness of light source;At the data
Reason system includes the computer connecting with imaging sensor.
The sealing propertytest system of a kind of aluminium foil blister packaging, it is characterized in that described image sensor is cmos image
Sensor.
The sealing propertytest system of a kind of aluminium foil blister packaging, it is characterized in that described image sensor includes CCD phase
Machine and image pick-up card, described image capture card are connected to a computer.
The sealing propertytest system of a kind of aluminium foil blister packaging, it is characterized in that aluminium-plastic bubble plate packing sealing propertytest system
The operation of system includes the following steps
1) Image Acquisition
Aluminum-plastic blister to be detected is lain on seal cavity bottom surface, makes aluminum-plastic blister upward;Start vacuum pump, adjusting is changed
To valve
It is connected to vacuum pump with seal cavity, after chamber vacuum degree to be sealed reaches requirement, makes imaging sensor pickup light
Source irradiation
Under aluminum-plastic blister image to be detected after be transmitted to computer;
2) image procossing specifically includes following steps
A) enhancing is handled
Collected aluminum-plastic blister image --- hereinafter referred to as image --- to be detected is subjected to greyscale transformation, and to enhancing
The contrast of image by greyscale transformation increases the difference of retroreflective regions and non-reflective region;
B) binary conversion treatment
Binary conversion treatment will be carried out by the image of enhancing processing, converts white for the pixel of retroreflective regions, it will not be anti-
The pixel in light region is converted into black;
C) piecemeal is handled
I. the image Jing Guo binary conversion treatment is subjected to piecemeal processing, making each image block only includes an aluminum-plastic blister
Image;
Ii. the image of the aluminum-plastic blister in each image block is divided into side to light image and shady face image two parts,
Calculate separately in side to light image as in the white pixel proportion of retroreflective regions and shady face image be used as retroreflective regions
White pixel proportion,
Iii. by side to light image white pixel proportion and reflective surface image in white pixel proportion into
Row compares, and when the two difference is more than setting value, then determines that the aluminum-plastic blister is air tight;
3) after the completion of detecting, vacuum pump is closed, opens relief valve, adjustable change valve is connected to seal cavity with relief valve.
A kind of aluminium-plastic bubble plate packing sealing propertytest system provided by the invention.It is former using differential air leak detection
Reason vacuumizes the airtight cavity for placing aluminum-plastic blister to be detected.Since aluminium-plastic bubble plate packing is to encapsulate under normal pressure, institute
To be in vacuum environment when aluminium foil blister packaging, the aluminium foil surface of intact blister package is encapsulated due to there are inside and outside differential pressure
It significantly heaves, and has almost no change there are the blister package aluminium foil surface of Air Leakage Defect, be maintained as state slightly concave downwards.
When aluminium-plastic bubble plate packing is in vacuum environment, gas leakage packaging is different with air tight surface of package deformation quantity, makees to the reflection of light
With difference.When light shines aluminium-plastic bubble plate packing surface with preferred 45-60 degree angle, the gastight work for being packaged in negative pressure
Under, surface is convex, and side to light has a large amount of light reflections, and therefore the retroreflective regions size of side to light and shady face is deposited
In significant difference;And the aluminium foil surface of gas leakage is remained stationary, the retroreflective regions difference in size of side to light and shady face is smaller.Benefit
With image processing techniques, collected vacuum aluminium-plastic bubble plate packing image is handled.Image procossing includes image enhancement, figure
As binaryzation and image block can side to light to each aluminum-plastic blister image and shady face image be compared to automatic
Determine its whether gas leakage.The efficiency and accuracy for substantially increasing aluminum-plastic blister detection, realize the differentiation of aluminium-plastic bubble plate packing
Automation, there is the features such as non-contact, high-precision, manufacturing cost is cheap and long service life, be suitable for practical application popularization.
Detailed description of the invention
Fig. 1 is a kind of embodiment general structure schematic diagram of aluminium-plastic bubble plate packing sealing propertytest system of the present invention;
1, vacuum pump in figure, 2, image pick-up card, 3, reversal valve, 4, relief valve, 6, pressure sensor, 8, pressure gauge, 9,
Power switch, 10, power supply indicator, 11, seal cavity, 12, light source, 13, CCD camera, 14, bracket, 15, cabinet, 16, light source
Controller, 17, computer, 18, station
Specific embodiment
This patent is described in detail below with reference to embodiment and its attached drawing.Embodiment is before being with technical solution described in this patent
The specific implementation for proposing progress gives detailed embodiment and process.But claims hereof protection scope is not limited to
Following embodiment descriptions.
Aluminium-plastic bubble plate packing sealing propertytest system provided by the invention, it is characterized in that the detection system is by vacuum air-channel
System, optical measuring system and data acquisition processing system composition,
The vacuum air-channel system includes seal cavity 11, vacuum pump 1, relief valve 4, reversal valve 3 and pressure sensor 6,
The reversal valve passes through pipeline respectively and is connected with seal cavity, vacuum pump and relief valve, pressure sensor be also mounted at it is close
On the pipeline that envelope cavity is directly connected to, the seal cavity inner bottom surface is used to place aluminum-plastic blister to be detected, seal cavity
Top surface has the window using transparent material sealing,
The optical measuring system includes light source 12, light source controller 16, imaging sensor and bracket 14, the light source and
Imaging sensor is mounted on that seal cavity is ipsilateral by bracket, the shooting direction of the direction of illumination of light source and imaging sensor with it is close
The angle for sealing inside cavity bottom surface is 45-60 °;The light source controller is connected with light source and controls the brightness of light source;
The data processing system includes the computer 17 connecting with imaging sensor.
The operation of the aluminium-plastic bubble plate packing sealing propertytest system, includes the following steps
1) Image Acquisition
Aluminum-plastic blister to be detected is lain on seal cavity bottom surface, makes aluminum-plastic blister upward;Start vacuum pump, adjusting is changed
Vacuum pump is connected to seal cavity to valve, after chamber vacuum degree to be sealed reaches requirement, shines imaging sensor photographic light sources
Computer is transmitted to after aluminum-plastic blister image to be detected under penetrating;
2) image procossing specifically includes following steps
A) enhancing is handled
Collected aluminum-plastic blister image (hereinafter referred to as image) to be detected is subjected to greyscale transformation, and to enhancing by ash
The contrast of the image of transformation is spent, the difference of retroreflective regions and non-reflective region is increased;
B) binary conversion treatment
Binary conversion treatment will be carried out by the image of enhancing processing, converts white for the pixel of retroreflective regions, it will not be anti-
The pixel in light region is converted into black;
C) piecemeal is handled
I. the image Jing Guo binary conversion treatment is subjected to piecemeal processing, making each image block only includes an aluminum-plastic blister
Image;
Ii. the image of the aluminum-plastic blister in each image block is divided into side to light image and shady face image two parts,
Calculate separately in side to light image as in the white pixel proportion of retroreflective regions and shady face image be used as retroreflective regions
White pixel proportion,
Iii. by side to light image white pixel proportion and reflective surface image in white pixel proportion into
Row compares, and when the two difference is more than setting value, then determines that the aluminum-plastic blister is air tight.
3) after the completion of detecting, vacuum pump is closed, opens relief valve, adjustable change valve is connected to seal cavity with relief valve.
Embodiment
In the present embodiment, described image sensor includes image pick-up card 2 and CCD camera 13, image pick-up card and is calculated
Machine is connected by USB data line, and the transparent material is glass.By image pick-up card, vacuum pump 1 in vacuum air-channel system,
Relief valve 4, reversal valve 3 and pressure sensor 6 and pipeline are mounted in cabinet 15, and seal cavity is mounted on cabinet upper surface,
The pressure gauge 8 of surface installation display pressure sensor pressure data and power switch 9 and power supply indicator 10 outside the enclosure;By light
Source controller and computer are arranged close on the station 18 of cabinet.The present embodiment provides aluminium-plastic bubble plate packing sealing propertytest systems
The general structure schematic diagram of system is as shown in Figure 1.
Using technical solution or those skilled in the art described in the invention patent in the invention patent technical solution
Under inspiration, similar technical solution is designed, and reaches above-mentioned technical effect, is the protection model for falling into the invention patent
It encloses.