CN114061836A - Vacuum leak detection device and method - Google Patents
Vacuum leak detection device and method Download PDFInfo
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- CN114061836A CN114061836A CN202111266750.XA CN202111266750A CN114061836A CN 114061836 A CN114061836 A CN 114061836A CN 202111266750 A CN202111266750 A CN 202111266750A CN 114061836 A CN114061836 A CN 114061836A
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- 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
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- G—PHYSICS
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- 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
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Abstract
The invention provides a vacuum leak detection device and a vacuum leak detection method. The device comprises an adsorption component, an image acquisition component and an image analysis component. The adsorption component comprises a first adsorption part and a second adsorption part, when the vacuum packaging object to be detected passes through the adsorption component, the first adsorption part generates adsorption force to enable the first surface of the vacuum packaging object to be adsorbed on the first adsorption part, and the second adsorption part descends and adsorbs the second surface of the vacuum packaging object to complete adsorption and pull-up actions on the second surface of the vacuum packaging object; the image acquisition component is arranged on one side of the adsorption component and is used for acquiring the image information of the vacuum packaging object after passing through the adsorption component; the image analysis assembly is connected to the image processing assembly, and the image analysis assembly compares the image information of the vacuum package obtained by the image acquisition assembly with the image information of the complete vacuum package to judge whether the vacuum package leaks air. The vacuum leak detection device and the vacuum leak detection method provided by the embodiment of the invention have the advantages of high detection speed and high efficiency.
Description
Technical Field
Embodiments of the present invention relate generally to the field of vacuum package inspection and, more particularly, to vacuum leak detection devices and methods.
Background
For the rapid nondestructive detection of gas content change and leakage condition in vacuum package, standard methods in GB/T15171 & lt & gt test method for sealing performance of flexible package & gt and ASTM D3078 & lt & gt test method for standard of measuring leakage of flexible package by foaming method are commonly used at home and abroad at present. At present, the vacuum package leakage detection is generally carried out by adopting a differential pressure method, namely, water injection and liquid level analysis are adopted for detection according to the law that the volume of ideal gas is inversely proportional to the pressure of the gas at a quantitative and fixed temperature. The used equipment is a vacuum packaging residual oxygen/leakage detector, a packaging object to be detected is placed into a metering cylinder, water is injected to a specified position, a test cylinder is vacuumized, and finally, the residual gas amount in the packaging bag or leakage observation is obtained through liquid level analysis, bubble observation and related conversion. The detection method has the defects of large size of detection equipment, low accuracy, long detection time, high requirement on additional equipment and facilities, low online speed and the like.
Therefore, a new vacuum leak detection device and a new leak detection method are needed to solve the above technical problems.
Disclosure of Invention
According to the embodiment of the invention, a vacuum leak detection device and a method scheme are provided, aiming at improving the detection speed and the detection efficiency.
In a first aspect of the invention, a vacuum leak detection device is provided. The device comprises an adsorption component, an image acquisition component and an image analysis component.
The adsorption component comprises a first adsorption part and a second adsorption part, wherein the second adsorption part is arranged above the first adsorption part, when a vacuum package to be tested passes through the adsorption component, the first adsorption part generates adsorption force to enable the first surface of the vacuum package to be tested to be adsorbed on the first adsorption part, the second adsorption part descends and adsorbs the second surface of the vacuum package to be tested to complete adsorption and pull-up actions on the second surface of the vacuum package to be tested, and the first surface and the second surface of the vacuum package to be tested are arranged oppositely; the image acquisition component is arranged on one side of the adsorption component and is used for acquiring the image information of the to-be-detected vacuum packaging object passing through the adsorption component; the image analysis component is connected to the image processing component, and compares the image information of the to-be-detected vacuum packaging object obtained by the image acquisition component with the image information of the complete vacuum packaging object to judge whether the to-be-detected vacuum packaging object leaks air.
According to an aspect of the embodiment of the invention, the first suction part comprises a tray and a first suction cup, wherein the tray is connected with the first suction cup and is provided with a through hole penetrating through the thickness of the tray and communicated with the first suction cup, and the first suction cup absorbs the first surface of the vacuum packaging object to be tested on the tray through the through hole.
According to an aspect of the embodiment of the present invention, the second suction part includes a lifting mechanism and a second suction cup, wherein the lifting mechanism is connected to the second suction cup, and the second suction cup can suck the second surface of the vacuum package to be tested and complete the sucking and pulling up actions on the second surface of the vacuum package to be tested through the lifting mechanism.
According to an aspect of the embodiment of the present invention, the number of the adsorption assemblies is two or more, and the adjacent adsorption assemblies are spaced apart from each other.
According to an aspect of the embodiment of the invention, the device further comprises a disc conveying mechanism, and more than two adsorption assemblies are arranged on the disc conveying mechanism.
According to an aspect of the embodiment of the present invention, the apparatus further comprises a first conveying mechanism and a second conveying mechanism, wherein the first conveying mechanism and the second conveying mechanism are respectively connected to the feeding end and the discharging end of the disc conveying mechanism.
According to an aspect of the embodiment of the present invention, the apparatus further includes a first pushing mechanism and a second pushing mechanism, wherein the first pushing mechanism is connected to the first conveying mechanism to push the vacuum package to be tested from the first conveying mechanism into the disc conveying mechanism, and the second pushing mechanism is connected to the disc conveying mechanism to push the vacuum package to be tested from the disc conveying mechanism into the second conveying mechanism.
According to an aspect of the embodiment of the invention, the vacuum packaging device further comprises a removing mechanism, the removing mechanism is arranged on one side of the adsorption assembly and electrically connected with the image analysis assembly, and when the image analysis assembly judges that the vacuum packaging material to be detected has air leakage, the removing mechanism is driven to remove the air leakage empty packaging material.
According to one aspect of the embodiment of the invention, the image acquisition assembly comprises an industrial camera and a polishing mechanism, when the vacuum packaging object to be detected passes through the image acquisition assembly, the polishing mechanism irradiates the vacuum packaging object to be detected, and the industrial camera performs imaging detection on the vacuum packaging object to be detected.
On the other hand, the embodiment of the invention also provides a vacuum leak detection device, and the method comprises the following steps: providing an adsorption mechanism, placing the vacuum packaging object to be detected on the adsorption mechanism, wherein the adsorption mechanism comprises a first adsorption part and a second adsorption part, the second adsorption part is arranged above the first adsorption part, the first adsorption part can generate adsorption force so that the first surface of the vacuum packaging object to be detected is adsorbed on the first adsorption part, the second adsorption part can descend and adsorb the second surface of the vacuum packaging object to be detected so as to complete adsorption and pulling-up actions on the second surface of the vacuum packaging object to be detected, and the first surface and the second surface of the vacuum packaging object to be detected are arranged oppositely; and providing an image acquisition and comparison mechanism, wherein the image acquisition component can acquire the image information of the vacuum packaging object to be detected after passing through the adsorption component and compare the image information with the image information of the complete vacuum packaging object so as to judge whether the vacuum packaging object to be detected leaks air or not.
According to the vacuum leakage detection device provided by the embodiment of the invention, when a vacuum packaging material to be detected passes through the adsorption component, the first adsorption part and the second adsorption part can respectively adsorb the upper surface and the lower surface of the vacuum packaging material to be detected, and the upper surface and the lower surface of the vacuum packaging material to be detected are adsorbed and pulled up, so that external air can rapidly enter the packaging bag with leakage or slight leakage, the air inflow is accelerated, the vacuum packaging material to be detected with air leakage can rapidly embody the air leakage characteristic of the vacuum packaging material to be detected, the image acquisition component is used for acquiring an image, the image analysis component is used for comparing the image of the vacuum packaging material to be detected acquired with the image information of the complete vacuum packaging material according to the image acquisition component, and whether the vacuum packaging material to be detected leaks air or not is rapidly distinguished, and therefore whether the vacuum packaging material leaks air or not is rapidly detected. In addition, the vacuum packaging material to be tested with air leakage can expand in the processes of adsorption and pull-up of the first adsorption part and the second adsorption part, and obvious difference exists when the air leakage is compared with the image information of the complete vacuum packaging material, so that the vacuum leakage detection device provided by the embodiment of the invention has high test accuracy.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
FIG. 1 illustrates a perspective view of a vacuum leak detection device provided by an embodiment of the present invention;
FIG. 2 illustrates a top view of a vacuum leak detection device provided by an embodiment of the present invention;
FIG. 3 shows a schematic view of a portion of the vacuum leak detection device of FIG. 1;
FIG. 4 shows a schematic view of a portion of the vacuum leak detection device of FIG. 1;
FIG. 5 shows an image of a leak in a micropore of a product I obtained after detection using a vacuum leak detection device provided by an embodiment of the present invention;
FIG. 6 shows an image of a product I without a leak, taken after inspection using a vacuum leak detection apparatus provided by an embodiment of the present invention;
FIG. 7 shows an image of a micropore leak in a product II acquired after inspection using a vacuum leak detection device provided by an embodiment of the present invention;
FIG. 8 shows an image of product II obtained after inspection using the vacuum leak detection apparatus provided by an embodiment of the present invention for no leak.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
10. the image acquisition device comprises an adsorption component 11, a first adsorption part 111, a tray 112, a first sucker 12, a second adsorption part 121, a lifting mechanism 122, a second sucker 20, an image acquisition component 30, a disc conveying mechanism 40, a first conveying mechanism 50, a second conveying mechanism 60, a first pushing mechanism 70, a second pushing mechanism 80 and a removing mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
A vacuum leak detection apparatus and a leak detection method provided by an embodiment of the present invention are described below with reference to fig. 1 to 8.
As shown in fig. 1 to 4, a vacuum leak detection apparatus provided according to an embodiment of the first aspect of the present invention includes an adsorption component 10, an image acquisition component 20, and an image analysis component.
Specifically, the adsorption component 10 includes a first adsorption part 11 and a second adsorption part 12, wherein the second adsorption part 12 is disposed above the first adsorption part 11, when the vacuum package to be tested passes through the adsorption component 10, the first adsorption part 11 generates an adsorption force to make the first surface of the vacuum package to be tested adsorbed on the first adsorption part 11, the second adsorption part 12 descends and adsorbs the second surface of the vacuum package to be tested to complete the adsorption and pull-up actions on the second surface of the vacuum package to be tested, the first surface and the second surface of the vacuum package to be tested are disposed oppositely, and the first surface and the second surface can be the upper surface and the lower surface of the vacuum package to be tested.
The image acquisition component 20 is arranged on one side of the adsorption component 10, and the image acquisition component 20 is used for acquiring the image information of the vacuum packaging object to be detected after passing through the adsorption component 10.
The image analysis component is connected to the image processing component, and compares the image information of the to-be-detected vacuum packaging object obtained by the image obtaining component 20 with the image information of the complete vacuum packaging object to judge whether the to-be-detected vacuum packaging object leaks air.
According to the vacuum leakage detection device provided by the embodiment of the invention, when a vacuum package to be detected passes through the adsorption component 10, the first adsorption part 11 and the second adsorption part 12 can respectively adsorb the upper surface and the lower surface of the vacuum package to be detected, and adsorb and pull the upper surface and the lower surface of the vacuum package to be detected, so that external air can rapidly enter the package bag with leakage or slight leakage, the air inflow is accelerated, the air-leaked vacuum package to be detected can rapidly embody the air leakage characteristic thereof, the image acquisition component 20 acquires an image, the image analysis component compares the image of the vacuum package to be detected acquired by the image acquisition component 20 with the image information of the complete vacuum package, and whether the vacuum package to be detected leaks air or not is rapidly distinguished, so that whether the vacuum package to be detected leaks air or not is rapidly detected. In addition, the vacuum packaging object to be tested with air leakage can expand in the processes of adsorption and pulling up of the first adsorption part 11 and the second adsorption part 12, and obvious difference exists when the air leakage is compared with the image information of the complete vacuum packaging object, so that the vacuum leakage testing device provided by the embodiment of the invention has high testing accuracy.
It can be understood that the image analysis component compares the image information of the to-be-detected vacuum package obtained by the image obtaining component 20 with the image information of the complete vacuum package, when the image information of the to-be-detected vacuum package is not much or not different from the image information of the complete vacuum package, the vacuum package is airtight, and when the image information of the to-be-detected vacuum package is obviously or greatly different from the image information of the complete vacuum package, the vacuum package is airtight.
It should be noted that although the vacuum package to be measured is adsorbed and pulled up by the first adsorption part 11 and the second adsorption part 12, the shape of the vacuum package without leakage is not changed, and the external package and the internal product are not affected.
In addition, the vacuum leakage detection device provided by the embodiment of the invention can rapidly distinguish whether the vacuum packaging material to be detected has air leakage or not in the modes of profile detection, photoelectric distance detection and the like.
In some embodiments, the first suction part 11 comprises a tray 111 and a first suction pad 112, wherein the tray 111 is connected to the first suction pad 112 and the tray 111 is provided with a through hole penetrating through the thickness thereof and communicating with the first suction pad 112, and the first suction pad 112 sucks the first surface of the vacuum package to be tested on the tray 111 through the through hole.
In these embodiments, after the vacuum package to be tested is placed on the tray 111, the lower surface is vacuum-sucked by the first suction cup 112 or sucked by the pneumatic actuator to the package edge portion, so as to fix the vacuum package to be tested. The first suction cup 112 may include a suction cup connected to the tray 111 and a vacuum pump connected to the suction cup, and the suction cup may have a certain rigidity to be able to support the tray 111. Alternatively, the through holes on the tray 111 may be regularly distributed, for example, a plurality of through holes may be arranged in a honeycomb shape, so as to improve the adsorption force of the tray 111 for adsorbing the vacuum packages to be tested. The upper surface of the tray 111, namely the surface adsorbed by the vacuum packaging object to be detected, can be a plane, so that good supporting force can be provided for the vacuum packaging object to be detected, and the adsorption force of the tray 111 for adsorbing the vacuum packaging object to be detected can be further improved.
In some embodiments, the second suction portion 12 includes a lifting mechanism 121 and a second suction cup 122, wherein the lifting mechanism 121 is connected to the second suction cup 122, and the second suction cup 122 is capable of sucking the second surface of the vacuum package to be tested and performing sucking and pulling actions on the second surface of the vacuum package to be tested by the lifting mechanism 121.
In such embodiments, the second suction cup 122 may comprise a suction cup and a vacuum pump, and the suction cup may be a soft suction cup, so that the second suction cup 122 can absorb various irregular vacuum packages to be tested. Alternatively, the lifting mechanism 121 may be a lifting cylinder.
In some embodiments, the number of the adsorption assemblies 10 is two or more, and the adjacent adsorption assemblies 10 are arranged at intervals, so that the vacuum leakage detection device of the present embodiment can simultaneously detect a plurality of vacuum packages to be detected, thereby improving the detection efficiency.
In some embodiments, the vacuum leak detection apparatus implemented by the present invention further includes a disk conveying mechanism 30, and two or more adsorption assemblies 10 are disposed on the disk conveying mechanism 30. The vacuum leak detection device can be reduced in size by arranging the adsorption assembly 10 on the disc conveying mechanism 30, so that the vacuum leak detection device is reduced in floor area. Alternatively, the disk conveying mechanism 30 has a turntable, and the first adsorption part 11 and the second adsorption part 12 may be fixed on the turntable of the disk conveying mechanism 30. Specifically, the tray 111 and the first suction cup 112 may be fixed to a turntable of the disc conveying mechanism 30, and the elevating mechanism 121 may be mounted to the turntable of the disc conveying mechanism 30 by a fixing member such as a bracket. The carousel conveyor mechanism 30 may be a carousel conveyor.
In these embodiments, the disk conveying mechanism 30 has 10-20 trays 111, each tray 111 is filled with honeycomb-shaped air holes, and the inner edge is provided with a suitable rib according to the height of the detected packaged object. The disk feeding mechanism 30 may perform cam intermittent motion to move one tray 111 detection position, stop one interval, move another tray 111 detection position, and so on in a cycle. The disc conveying mechanism 30 is favorable for the inlet and outlet of the vacuum packages to be detected.
In some embodiments, the vacuum leak detection apparatus of the present invention further comprises a first conveying mechanism 40 and a second conveying mechanism 50, wherein the first conveying mechanism 40 and the second conveying mechanism 50 are respectively connected to the feeding end and the discharging end of the disc conveying mechanism 30. The first conveying mechanism 40 is used for being connected with production equipment of vacuum packages connected with the vacuum leakage detecting device, and the second conveying mechanism 50 is used for being connected with packaging equipment, so that the production efficiency is improved. Alternatively, the first and second conveying mechanisms 40, 50 may be belt or chain conveyors.
In these embodiments, the vacuum packages to be tested are combed into a single row and spaced apart transport position by the first transport mechanism 40. The vacuum leak detection device is provided on one side of the first conveyance mechanism 40.
In some embodiments, the vacuum leak detection device implemented by the present invention further includes a first pushing mechanism 60 and a second pushing mechanism 70, wherein the first pushing mechanism 60 is connected to the first conveying mechanism 40 to push the vacuum packages to be detected from the first conveying mechanism 40 into the disc conveying mechanism 30, and the second pushing mechanism 70 is connected to the disc conveying mechanism 30 to push the vacuum packages to be detected from the disc conveying mechanism 30 into the second conveying mechanism 50. The first pushing mechanism 60 can push the vacuum packages to be detected on the first conveying mechanism 40 into the adsorption component 10 on the disc conveying mechanism 30, and the first pushing mechanism 60 can push the vacuum packages of the adsorption component 10 on the disc conveying mechanism 30 into the second conveying mechanism 50, so that the first conveying mechanism 40 and the second conveying mechanism 50 are connected with the disc conveying mechanism 30, and the detection efficiency is improved. Alternatively, the first and second push-in mechanisms 60 and 70 may include a cylinder and a push plate connected to the cylinder.
In some embodiments, the vacuum leakage detection device implemented by the present invention further includes a removing mechanism 80, which is disposed on one side of the adsorption component 10 and electrically connected to the image analysis component, and when the image analysis component determines that the vacuum package to be detected leaks air, the removing mechanism 80 is driven to remove the leaked vacuum package to be detected. Alternatively, the rejection mechanism 80 may include an air cylinder and a push plate coupled to the air cylinder. The reject mechanism 80 may be disposed between the image capturing assembly 20 and the second pushing mechanism 70.
In some embodiments, the image capturing assembly 20 includes an industrial camera and a polishing mechanism, the polishing mechanism irradiates the vacuum package to be detected when the vacuum package to be detected passes through the image capturing assembly 20, and the industrial camera performs imaging detection on the vacuum package to be detected. The industrial camera is favorable for acquiring a high-definition image of the vacuum packaging material to be detected, and the polishing mechanism is favorable for improving the definition of the image of the vacuum packaging material to be detected. Alternatively, the polishing mechanism may be a white stripe lamp.
In these embodiments, the stable imaging, analytical processing of the high-speed industrial camera ensures reliable differentiation of the conforming sample from the leaking vacuum package. The high-speed industrial camera sends the collected image to an image analysis system of the image analysis component through a gigabit network. The image analysis system processes the received images quickly according to the sequence. And analyzing and comparing the standard image, obtaining the result of the current image within millisecond time, and judging whether the vacuum package is leaked.
In these embodiments, the image acquisition component 20 further includes a profile imaging device, and the profile imaging device can collect the external profile of the vacuum package to be tested, and compare the external profile with the external profile of the qualified sample, so as to determine whether the vacuum package to be tested leaks air, thereby further improving the accuracy of the test.
Before detection, the line laser of the qualified sample can be collected by an industrial camera, such as a CCD camera, the line laser form of the qualified sample is recorded, and the three-dimensional space form of the sealing surface of the packaging bag is calculated. And then the vacuum leak detection device measures the external form of the vacuum packaging material to be detected, compares the forms of qualified products, extracts the characteristics of continuity, distance quantity and the like of the surface of the detected packaging material, and judges whether the product is qualified.
The working process of the vacuum leak detection device according to the embodiment of the present invention will be further described with reference to the following specific embodiments.
The first conveying mechanism 40 conveys the vacuum packages to be detected at uniform intervals, the speed is matched with the overall material conveying speed of the disc conveying mechanism 30, and accumulation at an inlet is avoided. When the detection photoelectric sensor S1 triggers to detect that the vacuum package to be detected is in place, and the photoelectric sensor S2 detects that the tray 111 of the first adsorption part 11 is in place, the feeding cylinder VF1 of the first pushing mechanism 60 extends to push the vacuum package to be detected into the tray 111 of the first adsorption part 11, and VF1 retracts. Vacuum adsorption solenoid valve VZ1 below tray 111 of first adsorption part 11 is actuated, tray 111 of first adsorption part 11 starts vacuum adsorption and fixation, and at the same time, VZ1-1 positioned at the upper part of tray 111 pulls up the solenoid valve to actuate, cylinder adsorption of second adsorption part 12; the VZ1-1-1 vacuum adsorption solenoid valve operates, after adsorption for 0.5s, the pulling solenoid valve VZ1-1 starts pulling and adsorption to repeat the operation for 5 times, then the VZ1-1-1 vacuum adsorption solenoid valve is closed to stop adsorption, and the VZ1-1 pulling solenoid valve is retracted. The high-speed industrial camera CAM1 of the image acquisition assembly 20 is fixed in position (the third station before the image acquisition assembly goes out of the turntable, and the second station is used for eliminating leakage unqualified products by the eliminating mechanism 80), and is matched with two light sources L1 and L2 of the polishing mechanism to alternately strobe to polish two colors of the industrial camera, detect the packaging form of the lifted surface, and simultaneously close the lower vacuum adsorption electromagnetic valve VZ 1. The industrial camera CAM1 detects the unqualified product, sends an NG signal to a removing cylinder VF-TC of the removing mechanism 80 through the image analysis component, and stretches out to remove the leaked vacuum packaging materials; the vacuum packages which are not detected to leak rotate to the position of the outlet tray 111, the outlet air cylinder VF2 of the second pushing mechanism 70 acts to push qualified products into the second conveying mechanism 50, then the qualified products are withdrawn, the tray 111 rotates to enter the position of the material receiving inlet, and the detection is continued.
On the other hand, the embodiment of the invention also provides a vacuum leak detection method, which comprises the following steps:
s101, provide the adsorption apparatus, place the vacuum packing material that awaits measuring at the adsorption apparatus, wherein the adsorption apparatus includes first adsorption part and second adsorption part, the second adsorption part sets up the top at first adsorption part, first adsorption part can produce the adsorption affinity so that the first surface of the vacuum packing material that awaits measuring adsorbs in first adsorption part, the second adsorption part can descend and adsorb the second surface of the vacuum packing material that awaits measuring in order to accomplish the second surface adsorption and the action of pulling up to the vacuum packing material that awaits measuring, the first surface and the second surface of the vacuum packing material that awaits measuring set up relatively.
In these embodiments, the first suction part may include a tray and a first suction cup, wherein the tray is connected to the first suction cup and is provided with a through hole penetrating through the thickness of the tray and communicating with the first suction cup, and the first suction cup sucks the first surface of the vacuum package to be tested on the tray through the through hole. The second adsorption part comprises a lifting mechanism and a second sucker, wherein the lifting mechanism is connected with the second sucker, and the second sucker can adsorb the second surface of the vacuum packaging material to be detected and complete the adsorption and the pull-up action of the second surface of the vacuum packaging material to be detected through the lifting mechanism.
In the embodiments, the vacuum packages to be tested can be conveyed by the conveying mechanism before entering the adsorption mechanism, and the adjacent vacuum packages to be tested are spaced from each other, so that the vacuum packages to be tested can enter the adsorption mechanism sequentially. In addition, the adsorption mechanism may be provided in plurality to improve detection efficiency. The vacuum packaging material to be detected can be conveyed by the conveying mechanism after being adsorbed and pulled up by the adsorption mechanism so as to carry out the subsequent processes of packaging and the like.
And S102, providing an image acquisition and comparison mechanism, wherein the image acquisition and comparison mechanism can acquire the image information of the vacuum packaging object to be detected after passing through the adsorption component and compare the image information with the image information of the complete vacuum packaging object so as to judge whether the vacuum packaging object to be detected leaks air.
It can be understood that the image obtaining and comparing mechanism compares the image information of the to-be-detected vacuum package obtained by the image obtaining component with the image information of the complete vacuum package, when the image information of the to-be-detected vacuum package is not much or not different from the image information of the complete vacuum package, the vacuum package is airtight, and when the image information of the to-be-detected vacuum package is obviously or greatly different from the image information of the complete vacuum package, the vacuum package is airtight.
In addition, the image acquisition and comparison mechanism can also acquire the external contour of the vacuum packaging object to be detected, and the acquired external contour of the vacuum packaging object to be detected is compared with the external contour of the qualified product, so that whether the vacuum packaging object to be detected leaks air or not is judged, and the detection accuracy is further improved.
According to the vacuum leakage detection method provided by the embodiment of the invention, when a vacuum packaging object to be detected passes through the adsorption component, the first adsorption part and the second adsorption part can respectively adsorb the upper surface and the lower surface of the vacuum packaging object to be detected, and the upper surface and the lower surface of the vacuum packaging object to be detected are adsorbed and pulled up, so that external air can rapidly enter the packaging bag with leakage or slight leakage, the air inflow is accelerated, the air leakage characteristic of the vacuum packaging object to be detected can be rapidly embodied, the image acquisition component is used for acquiring an image, the image analysis component is used for comparing the image of the vacuum packaging object to be detected acquired according to the image acquisition component with the image information of the complete vacuum packaging object, and whether the vacuum packaging object to be detected leaks or not is rapidly distinguished, so that whether the vacuum packaging object leaks or not is rapidly detected. In addition, the vacuum packaging material to be tested with air leakage can expand in the processes of adsorption and pull-up of the first adsorption part and the second adsorption part, and obvious difference exists when the air leakage is compared with the image information of the complete vacuum packaging material, so that the vacuum leakage detection method provided by the embodiment of the invention has high test accuracy.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A vacuum leak detection device, comprising:
the adsorption component comprises a first adsorption part and a second adsorption part, wherein the second adsorption part is arranged above the first adsorption part, when a vacuum package to be tested passes through the adsorption component, the first adsorption part generates adsorption force to enable the first surface of the vacuum package to be tested to be adsorbed on the first adsorption part, the second adsorption part descends and adsorbs the second surface of the vacuum package to be tested to complete adsorption and pull-up actions on the second surface of the vacuum package to be tested, and the first surface and the second surface of the vacuum package to be tested are arranged oppositely;
the image acquisition component is arranged on one side of the adsorption component and is used for acquiring the image information of the vacuum packaging object to be detected after passing through the adsorption component;
and the image analysis component is connected to the image processing component, and compares the image information of the to-be-detected vacuum packaging object obtained by the image acquisition component with the image information of the complete vacuum packaging object so as to judge whether the to-be-detected vacuum packaging object leaks air.
2. The vacuum leak detection device according to claim 1, wherein the first suction part comprises a tray and a first suction cup, wherein the tray is connected with the first suction cup and is provided with a through hole penetrating through the thickness of the tray and communicated with the first suction cup, and the first suction cup sucks the first surface of the vacuum packaging object to be detected on the tray through the through hole.
3. The vacuum leak detection device according to claim 1, wherein the second suction portion comprises a lifting mechanism and a second suction cup, wherein the lifting mechanism is connected to the second suction cup, and the second suction cup can suck the second surface of the vacuum package to be detected and complete sucking and pulling up of the second surface of the vacuum package to be detected by the lifting mechanism.
4. The vacuum leak detection device according to claim 1, wherein the number of the suction assemblies is two or more, and the adjacent suction assemblies are arranged at a distance from each other.
5. The vacuum leak detection device according to claim 4, further comprising a disk conveying mechanism, wherein two or more of the adsorption assemblies are disposed on the disk conveying mechanism.
6. The vacuum leak detection device according to claim 5, further comprising a first conveyor and a second conveyor, wherein the first conveyor and the second conveyor are connected to the feed end and the discharge end of the disk conveyor, respectively.
7. The vacuum leak detection device according to claim 6, further comprising a first pushing mechanism and a second pushing mechanism, wherein the first pushing mechanism is connected to the first conveying mechanism to push the vacuum package to be tested from the first conveying mechanism into the disc conveying mechanism, and the second pushing mechanism is connected to the disc conveying mechanism to push the vacuum package to be tested from the disc conveying mechanism into the second conveying mechanism.
8. The vacuum leakage detection device according to claim 1, further comprising a removing mechanism disposed at one side of the adsorption assembly and electrically connected to the image analysis assembly, wherein when the image analysis assembly determines that the vacuum package to be detected has air leakage, the removing mechanism is driven to remove the air-leaked vacuum package to be detected.
9. The vacuum leak detection device according to claim 1, wherein the image acquisition component comprises an industrial camera and a polishing mechanism, when the vacuum packaging object to be detected passes through the image acquisition component, the polishing mechanism irradiates the vacuum packaging object to be detected, and the industrial camera performs imaging detection on the vacuum packaging object to be detected.
10. A method of vacuum leak detection, the method comprising the steps of:
providing an adsorption mechanism, placing a vacuum package to be tested on the adsorption mechanism, wherein the adsorption mechanism comprises a first adsorption part and a second adsorption part, the second adsorption part is arranged above the first adsorption part, the first adsorption part can generate adsorption force so that a first surface of the vacuum package to be tested is adsorbed on the first adsorption part, the second adsorption part can descend and adsorb a second surface of the vacuum package to be tested so as to complete adsorption and pulling-up actions on the second surface of the vacuum package to be tested, and the first surface and the second surface of the vacuum package to be tested are arranged oppositely;
and providing an image acquisition and comparison mechanism, wherein the image acquisition component can acquire the image information of the vacuum packaging object to be detected after passing through the adsorption component and compare the image information with the image information of the complete vacuum packaging object so as to judge whether the vacuum packaging object to be detected leaks air or not.
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