CN111699372B - Air tightness detection device, detection system and detection method - Google Patents
Air tightness detection device, detection system and detection method Download PDFInfo
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- CN111699372B CN111699372B CN201980012100.7A CN201980012100A CN111699372B CN 111699372 B CN111699372 B CN 111699372B CN 201980012100 A CN201980012100 A CN 201980012100A CN 111699372 B CN111699372 B CN 111699372B
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
Abstract
The air tightness detection device comprises a control box (10), a detection box (20) and a driving assembly (30) which are arranged on the control box (10), and an image acquisition device (40) which is matched with the detection box (20); the detection box (20) can form a closed cavity under the action of the driving assembly (30), the cavity is used for containing at least one tested product, and an air inlet and outlet assembly (11) communicated with the cavity is arranged in the control box (10); the image acquisition device (40) is used for acquiring images in the cavity in real time and performing image analysis when the air tightness detection is performed so as to output an image analysis result to determine the air tightness of the detected product. The tested product in the closed environment is subjected to image acquisition, whether the tested product meets the air tightness requirement or not is determined by analyzing the image, the testing efficiency is improved, the tested product cannot be damaged, the testing requirements of products in batches are met, and the testing of the products with different specifications is compatible.
Description
[ technical field ] A method for producing a semiconductor device
The embodiment of the invention belongs to the technical field of testing, and particularly relates to air tightness detection equipment, a detection system and an air tightness detection method.
[ background of the invention ]
With the continuous improvement of the technical level of electronic products such as handheld photographing equipment, the requirements on the air tightness, the water resistance, the service life and the like of the electronic products are higher and higher, so that the air tightness test of the whole electronic product which is a sealing body is more and more important.
The existing air tightness test of electronic products generally adopts a water soaking test mode, the test mode requires that the volume of test equipment is large, the equipment cost is relatively high, the test efficiency of the test mode is low, the electronic products are easily damaged in the water soaking test process, the test requirements of batch products cannot be met, and meanwhile, the test of products with different specifications cannot be compatible.
[ summary of the invention ]
Against the background, embodiments of the present invention provide an air tightness detection device to solve the problems that a test device in a test mode adopted in the prior art has a large volume and low test efficiency, is easy to damage a tested product, cannot meet test requirements of batch products, and cannot be compatible with tests of products of different specifications; in addition, the embodiment of the invention also provides an air tightness detection system and an air tightness detection method.
The technical scheme adopted by the application is as follows.
An airtightness detection apparatus comprising:
the control box is provided with a detection box and a driving assembly which are arranged on the control box, and the image acquisition device is matched with the detection box;
the detection box can form a closed cavity under the action of the driving assembly, the cavity is used for accommodating at least one tested product, and an air inlet and outlet assembly communicated with the cavity is arranged in the control box;
the image acquisition device is used for acquiring images in the cavity in real time and carrying out image analysis when carrying out air tightness detection so as to output an image analysis result to determine the air tightness of a detected product.
The air tightness detection system comprises a film laminating device and the air tightness detection equipment, wherein the film laminating device is used for forming a detection film on the surface of a detected product before detection, and when the air tightness of the detected product is unqualified, the detection film deforms in the detection process.
An air tightness detection method is applied to the air tightness detection system, and the method comprises the following steps:
carrying out film covering operation on a detected product to form a detection film on the surface of the detected product;
placing a product to be tested in the cavity to form a closed environment, and inflating or evacuating the cavity according to preset time;
after the inflation or the air exhaust is finished, maintaining the pressure of the cavity according to preset pressure maintaining time, and acquiring an image of a detected product in real time;
and analyzing the acquired image, judging that the air tightness of the detected product is unqualified when the detection membrane continuously deforms within the pressure maintaining time, determining an air leakage point of the detected product according to the deformation position of the detection membrane, and judging that the detected product is qualified if the detected product is not qualified.
The air tightness detection device, the air tightness detection system and the air tightness detection method provided by the embodiment of the application have the advantages that the tested product in the air tightness test in the closed environment is subjected to image acquisition, whether the tested product meets the air tightness requirement or not is determined by analyzing the image, the test device is small in size, the test efficiency is improved, the tested product cannot be damaged, the test requirements of products in batches can be met, and meanwhile, the test of products with different specifications can be compatible.
[ description of the drawings ]
In order to illustrate the solution of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are some embodiments of the invention, and that other drawings may be derived from these drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic overall structure diagram of an air-tightness detection device provided in an embodiment of the present invention;
fig. 2 is an exploded view of a gas tightness detecting apparatus provided in an embodiment of the present invention;
FIG. 3 is a schematic view of a driving assembly connected to a detection box according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a control box provided in an embodiment of the present invention;
fig. 5 is a flowchart of a method for detecting air tightness according to an embodiment of the present invention.
Description of the reference numerals:
[ detailed description ] embodiments
In order to make the technical solutions of the present invention better understood, 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. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention and the above-described drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The embodiment of the invention provides air tightness detection equipment, which comprises:
the control box is provided with a detection box and a driving assembly which are arranged on the control box, and the image acquisition device is matched with the detection box;
the detection box can form a closed cavity under the action of the driving assembly, the cavity is used for accommodating at least one tested product, and an air inlet and outlet assembly communicated with the cavity is arranged in the control box;
the image acquisition device is used for acquiring images in the cavity in real time and carrying out image analysis when carrying out air tightness detection so as to output an image analysis result to determine the air tightness of a detected product.
Based on the air tightness detection equipment, the embodiment of the invention also provides an air tightness detection system, which comprises a film laminating device and the air tightness detection equipment, wherein the film laminating device is used for forming a detection film on the surface of a detected product before detection, and when the air tightness of the detected product is unqualified, the detection film deforms in the detection process.
Based on the air tightness detection system, the embodiment of the invention also provides an air tightness detection method, which comprises the following steps:
carrying out film covering operation on a detected product to form a detection film on the surface of the detected product;
placing a product to be tested in the cavity to form a closed environment, and inflating or evacuating the cavity according to preset time;
after the inflation or the air exhaust is finished, maintaining the pressure of the cavity according to preset pressure maintaining time, and acquiring an image of a detected product in real time;
and analyzing the acquired image, judging that the air tightness of the detected product is unqualified when the detection membrane continuously deforms within the pressure maintaining time, determining an air leakage point of the detected product according to the deformation position of the detection membrane, and judging that the detected product is qualified if the detected product is not qualified.
According to the air tightness detection device, the air tightness detection system and the air tightness detection method, the tested product in the air tightness test in the closed environment is subjected to image acquisition, whether the tested product meets the air tightness requirement or not is determined by analyzing the image, the test device is small in size, the test efficiency is improved, the tested product cannot be damaged, the test requirements of products in batches can be met, and meanwhile, the test of products with different specifications can be compatible.
In order to make the technical solutions of the present invention better understood, 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.
The embodiment of the invention provides air tightness detection equipment which can be used for carrying out air tightness detection on electronic products with air tightness or waterproof property detection requirements, particularly air tightness detection on electronic products with small volume, and certainly, the air tightness detection equipment provided by the embodiment of the invention can also be used for carrying out detection on non-electronic products with air tightness requirements or electronic products with large volume and air tightness requirements. In this embodiment, the detected electronic product may be a single electronic function module, such as a camera module, or an assembled electronic product complete machine, such as a shooting device, a mobile terminal, a tablet computer, an intelligent wearable device, and the like.
Referring to fig. 1 and 2, the air tightness detecting apparatus according to the embodiment of the present invention includes a control box 10, a detecting box 20 and a driving assembly 30 disposed on the control box 10, and an image capturing device 40 disposed in cooperation with the detecting box 20; the detection box 20 can form a closed cavity under the action of the driving assembly 30, the cavity is used for accommodating at least one tested product, and an air inlet and outlet assembly 11 communicated with the cavity is arranged in the control box 10; the image acquisition device 40 can acquire images in the cavity in real time and perform image analysis when performing air tightness detection, so as to output an image analysis result to determine the air tightness of the detected product. Further, in some embodiments, as shown in fig. 1, a protective cover assembly 50 may be further disposed on the outer sides of the detection box 20 and the driving assembly 30, and the cover assembly 50 may be fixed on the control box 10 or may be connected to the driving assembly 30.
When the air tightness detection equipment provided by the invention is used for detection, an auxiliary detection object is required to be matched, in the embodiment of the invention, the auxiliary detection object can be a detection film coated on the surface of a detected product, wherein the detection film can be a flowing foam film or a soft plastic film, when the cavity is inflated or exhausted through the air inlet and outlet assembly 11, the air pressure inside and outside the detected product can form a pressure difference, the air on the side with high pressure has a tendency of flowing to the side with low pressure, if the detected product leaks air, the detection film at the air leakage position is deformed or obviously deformed due to the flowing of the air, and at the moment, the position where the detection film deforms can be obtained by analyzing an image acquired by the image acquisition device 40, so that whether the detected product leaks air or not can be determined, and the air leakage position of the detected product can also be determined when the detected product leaks air; of course, if the degree of air leakage or air leakage of the product to be detected meets the preset range, the detection film in the image collected by the image collecting device 40 will not be deformed or deformed inconspicuously. In this embodiment, the number of the tested products put into the cavity of the detection box 20 may be two or more, which facilitates batch detection and improves detection efficiency.
In some embodiments of the present invention, the image capturing device 40 may be disposed in the cavity, specifically, the image capturing device 40 is entirely located in the cavity and fixed on a cavity wall of the cavity, a camera of the image capturing device 40 faces a detection position located in the cavity, and the image capturing device 40 is in communication connection with an external component in a wireless connection manner; or the image acquisition device 40 is connected with an external component by wire, and penetrates through the wall of the detection box 20 to enter the cavity, and the camera of the image acquisition device 40 faces the detection position in the cavity, and at this time, the camera may be directly embedded in the wall of the detection box 20, or a connection wire connected with the camera penetrates through the wall, so that the camera at the end of the connection wire is suspended in the cavity, and the camera 41 of the image acquisition device 40 shown in fig. 2 is embedded in the wall; or the image capturing device 40 is disposed outside the detection box 20, in this case, the detection box 20 is made of a transparent material, the image capturing device 40 is located on one side of the detection box 20, and the camera of the image capturing device 40 is directed to the detection position located in the cavity through the box body of the detection box 20.
In the embodiment of the present invention, the number of the cameras included in the image capturing device 40 may be 1 to 4, and it should be noted that, no matter whether the image capturing device 40 is located in the cavity or outside the detection box 20, the number of the cameras is specifically based on that the cameras can cover the detected portion on the detected product, and in some embodiments, the number of the cameras may also be higher than 4, which is not limited herein.
Referring to fig. 3 in combination with fig. 2, in the embodiment of the present invention, the detection box 20 includes a seat 21 and a cover 22, the seat 21 is fixed on the control box 10, and specifically, the seat 21 is fixedly connected to an upper box plate of the control box 10; the cover 22 is fixedly connected with the driving assembly 30, and the driving assembly 30 can drive the cover 22 to move, so that the cover 22 is abutted against or separated from the base 21, wherein the abutting is used for forming a closed cavity, and the separation is used for taking and placing a tested product; the air inlet and outlet assembly 11 is communicated with an inner cavity of the seat body 21, wherein the whole image acquisition device 40 or a camera of the image acquisition device 40 can be fixed on the inner wall of the seat body 21 or the cover body 22.
Further, a sealing element 23 may be disposed between the cover 22 and the seat 21 to increase the sealing performance of the cavity, specifically, the sealing element 23 may be a rubber ring, further, an accommodating groove of the sealing element 23 may be disposed on the cover 22 and/or the seat 21, in fig. 2, the seat 21 is provided with an accommodating groove, and the sealing element 23 is located in the accommodating groove of the seat 21.
Further, as shown in fig. 3 and with reference to fig. 2, the driving assembly 30 includes a supporting member 31 and a driving member 32 fixed on the supporting member 31, the driving member 32 is fixedly connected to the cover 22, and the driving member 32 can drive the cover 22 to move, so that the cover 22 and the seat 21 abut against or separate from each other. In this embodiment, the driving member 32 may be a driving cylinder or a driving motor, and the supporting member 31 may be a supporting plate or a supporting frame. Specifically, the driving rod 321 of the driving element 32 may be directly connected to the cover 22, or may be connected to the cover 22 through an adapter plate, as shown in fig. 3, that is, in a case of being connected through the adapter plate 301, further, at least one guide rail 302 may be further disposed on the supporting element 31, the cover 22 or the adapter plate may be slidably connected to the guide rail 302 through at least one sliding block 303, and the movement of the cover 22 may be guided through the guide rail 302, so as to define a movement track of the cover 22.
In some embodiments, the supporting member 31 is further provided with at least one buffering member 33, and the buffering member 33 buffers the movement of the cover 22 when the driving member 32 drives the cover 22 to separate from the seat 21, and also limits the movement range of the cover 22.
In some embodiments, the control box 10 is further provided with a protection member 60 for material loading protection, and the protection member 60 may be directly mounted on the upper box plate of the control box 10 or may be mounted on the upper box plate of the control box 10 through a mounting plate, in this embodiment, the protection member 60 may employ a safety light barrier, and specifically, the safety light barrier includes an emitting end and a receiving end, which are respectively disposed at two opposite ends of the control box 10.
In the embodiment of the invention, the seat body 21 and the cover body 22 are compressed by the driving part 32 to manufacture a closed environment, and meanwhile, the seat body 21 and the cover body 22 can be conveniently separated, so that the tested product can be conveniently taken and placed.
Based on the above embodiment, in the embodiment of the present invention, the air tightness detecting apparatus may further include an air pressure detecting device (not shown in the figure), and the air pressure detecting device may collect air pressure in the cavity in real time during air tightness detection to output an air pressure detection result, and determine the air tightness of the detected product by matching with the image analysis result. In some embodiments, the air pressure detecting device is an air-tight instrument independent from the detection box 20, and the air-tight instrument inflates or evacuates the cavity through the air inlet and outlet assembly 11, and detects the air pressure change in the cavity in real time after inflating or evacuating; the sensitivity of the air-tight instrument is higher than that of a barometer, the air pressure can be monitored in real time, and the air pressure in the cavity can be controlled and monitored through the air-tight instrument, so that the detection of small air leakage of a detected product can be realized.
Specifically, after a product to be tested is placed in the detection box 20, the interior of the detection box 20 is continuously pressurized or depressurized through the air-tightness meter, the air pressure inside the detection box 20 is pressurized or depressurized to a rated value within a specific time period generally controlled by the pressurization or depressurization process, and then the pressure is maintained for a preset time period, such as 10 minutes, wherein the preset time period for pressure maintenance is associated with the type of the product to be tested and the rated value for pressurization or depressurization, and can be set according to actual conditions in an actual scheme so as to meet the test requirements without damaging the product to be tested; during pressure maintaining, pressure difference exists between the inside and the outside of a detected product, air with the larger pressure tends to permeate to the air with the smaller pressure, if the air pressure detection device detects that the air pressure in the detection box 20 does not change after the pressure maintaining is carried out for a period of time, the air tightness of the detected product is good, if the air pressure detection device detects that the air pressure in the detection box 20 changes, the air leakage phenomenon of the detected product is indicated, wherein if the air tightness instrument initially pressurizes the detection box 20, the air pressure in the detection box 20 is reduced, and if the air tightness instrument initially pressurizes the detection box 20, the air pressure in the detection box 20 is increased; so cooperate image acquisition device 40 can be quick select bad product to confirm the gas leakage position of bad product, be convenient for discriminate the gas tightness of being surveyed the product, do not have the damage to being surveyed the product, promoted product line yield and production efficiency. In actual conditions, the air leakage degree of different tested products is different, so that whether the tested products meet the air tightness requirement or not can be set, an air pressure change threshold value can be set, the tested products are judged not to meet the air tightness requirement only when the air pressure change exceeds the threshold value, and the air pressure change threshold value can be obtained through testing of qualified products.
Further, in the embodiment of the present invention, the image capturing device 40 is electrically connected to the control module disposed in the control box 10, and it should be noted that, in order to conveniently show the components, the connection lines and part of the connection interfaces for realizing the electrical connection in fig. 1 to 4 are omitted; the control assembly includes a control panel 12 and a button set connected to the control panel 12, the button set is partially disposed through the box of the control box 10, the control panel 12 can be connected to the button set, the driving member 32 and the image capturing device 40 respectively, and in some embodiments, the air inlet and outlet assembly 11 can be further connected to control the opening or closing of the air inlet and outlet assembly 11, in a specific embodiment, as shown in fig. 4, the button set includes, but is not limited to, an activation button (121a, 121b), a reset button 122, an emergency stop button 123, etc., where two activation buttons can control the activation of different components, such as the activation of the driving member 32 and the activation of the image capturing device 40, and of course, other components can also be controlled to be activated, which is not limited herein. In some embodiments, as shown in fig. 4, a display device 13 and/or a speaker device 14 connected to the control board 12 are further disposed on the box body of the control box 10, where the display device 13 may be used to display detection parameters, detection results, and the like, as shown in fig. 2, in this embodiment, the display device 13 includes a display screen 131 and a screen cover 132 that protects the display screen 131, and when the image capturing device 40 is matched with the display screen 131, the captured image may also be displayed in the display screen 131 in real time, and structural changes on the surface of the detected product are directly observed to analyze and determine whether the detected product leaks air and confirm the air leakage position; the speaker 14 can be used to indicate whether the product is air-leakage or to alarm the equipment failure. In the embodiment of the present invention, as shown in fig. 2, the casing of the control box 10 includes a top plate 101, a bottom plate 102 and side plates (103a, 103b, 103c, 103d), and the button group, the display device 13 and the speaker device 14 may be located on the same side plate or on different side plates; in some embodiments, the top plate 101 and the side plates are movably connected, the interior of the control box 10 can be installed or repaired by opening the top plate 101, and the top plate 101 and the side plates can be locked by locking fasteners (15a, 15b) in a conventional manner; in other embodiments, the side plates may further include a lifting member (16a, 16b) to facilitate handling of the detection box 20 or the air tightness detection apparatus as a whole.
The air tightness detection device provided by the embodiment of the invention is convenient for taking and placing the detected product, in the test process, the sealed environment is inflated or exhausted, the image of the detected product of the film covering in the air tightness test after being inflated or exhausted is acquired, and whether the detected product meets the air tightness requirement is determined by analyzing the image.
The embodiment of the invention also provides an air tightness detection system which can be used for detecting the air tightness of a product and comprises a film laminating device and the air tightness detection equipment, wherein the film laminating device is used for forming a detection film on the surface of the detected product before detection, and when the air tightness of the detected product is unqualified, the detection film deforms in the detection process. The detection film can be a flowable foam film or a soft plastic film, and correspondingly, the film covering device can be a foam film covering device or a plastic film covering device.
Further, the air tightness detection system can further comprise a loading and unloading device, wherein the loading and unloading device is used for loading the tested product after film coating into the cavity and removing the tested product after detection from the cavity; in some embodiments, the feeding and discharging device may also be used for feeding and discharging in a film covering operation, and is not limited herein.
The airtightness detection system provided by the embodiment of the invention has the advantages that the film covering operation is carried out on the detected product, the air inflation or air suction operation is carried out on the sealed environment where the film-covered detected product is located, then the image acquisition is carried out on the detected product, and whether the detected product meets the airtightness requirement is determined by analyzing the image.
An embodiment of the present invention further provides an air tightness detection method, which is applied to the air tightness detection system described above, and as shown in fig. 5, the method includes:
s1, performing film covering operation on the tested product to form a detection film on the surface of the tested product;
s2, placing the product to be tested in the cavity to form a closed environment, and inflating or evacuating the cavity according to preset time;
s3, maintaining pressure of the cavity according to preset pressure maintaining time after inflation or air exhaust is finished, and acquiring an image of a detected product in real time;
and S4, analyzing the acquired image, judging that the air tightness of the detected product is unqualified when the detection film continuously deforms within the pressure maintaining time, determining an air leakage point of the detected product according to the deformation position of the detection film, and judging that the detected product is qualified if the air leakage point is not qualified.
Referring to fig. 1 to 4, in the embodiment of the present invention, the detection film is a flowable foam film or a flexible plastic film, and when the flowable foam film is used, the thickness of the flowable foam film may be configured to be 3 to 7 mm. With the combination of the air tightness detection device and the air tightness detection system mentioned in the above embodiments, after the film covering operation of the product to be detected is completed by the film covering device, the product to be detected after film covering is placed in the detection box 20 of the air tightness detection device, and the cavity of the detection cavity is inflated or exhausted by the air tightness instrument and the air inlet/outlet assembly 11, so that the air pressure inside and outside the product to be detected forms a pressure difference, the air at the side with higher pressure has a tendency to flow towards the side with lower pressure, and then the pressure is maintained for a period of time, if the product to be detected leaks air, the detection film at the air leakage position is deformed or obviously deformed due to the flow of the air, and at this time, the position where the detection film is deformed can be obtained by analyzing the image acquired by the image acquisition device 40, so that whether the product to be detected leaks air or not can be determined, and the air leakage position of the product to be detected can also be determined when the product to be detected leaks air, taking the detection membrane as an example, in the stage of inflation or air extraction, because the inflation or air extraction process is performed smoothly, the foam membrane has certain stability, the model of the foam membrane can not change due to inflation or air extraction, in the stage of pressure preservation, if the detected product is not air-tight, the foam membrane can maintain the membrane shape unchanged, if the surface of the detected product has air leakage, due to air flow caused by the air pressure difference between the inside and the outside of the detected product, the foam membrane at the air leakage position can be sunken or bulged, and thus even if local slight air leakage is reflected on the surface of the foam membrane, thereby accurately determining the air leakage position.
Of course, if the air leakage or air leakage degree of the detected product meets the preset range, the detection film in the image collected by the image collecting device 40 will not deform or deform insignificantly. In this embodiment, the number of the tested products put into the cavity of the detection box 20 may be two or more, which facilitates batch detection and improves detection efficiency.
In the present embodiment, the pressurizing or depressurizing process inside the detection box 20 is generally controlled to pressurize or depressurize the air pressure inside the detection box 20 to a rated value for a specific time period, for example, 1 to 5 seconds. In addition, a preset pressure maintaining time can be set for the pressure maintaining inside the detection box 20 after pressurization or depressurization, for example, the pressure maintaining time for maintaining the pressure in the cavity is 8 to 12 minutes, the preset pressure maintaining time is associated with the type of the product to be detected and a rated value of pressurization or depressurization, and in a specific scheme, the preset pressure maintaining time can be set according to actual conditions so as to meet the test requirements and avoid damage to the product to be detected; in the pressure maintaining process, pressure difference exists between the inside and the outside of the detected product, and if the detected product leaks air, air permeates from the side with the larger pressure to the side with the smaller pressure, so that the air pressure of the cavity can be changed; and at the moment, the air tightness of the tested product can be comprehensively determined according to the air pressure detection result and the image analysis result in the cavity. Specifically, after the product to be detected is placed in the detection box 20, and after the detection box is inflated or exhausted for a period of time, if the air pressure inside the detection box 20 is not changed, the air tightness of the product to be detected is good, and the air tightness of the product can be judged only by the change of the air pressure; if the inside atmospheric pressure of detection case 20 changes, it has the gas leakage phenomenon to explain surveyed product, wherein, if airtight appearance is original to detection case 20 pressurization, then the inside atmospheric pressure of detection case 20 can reduce, if airtight appearance is original to detection case 20 pressurization, then the inside atmospheric pressure of detection case 20 can increase, the quick bad product of selecting, cooperation image acquisition device 40 can also confirm fast bad product gas leakage position this moment, the process of judging whether the gas tightness meets the requirements of being surveyed the product does not have the damage to being surveyed the product, product line yield and production efficiency have been promoted. In addition, the air leakage position of a bad product can be counted, the position with high air leakage occurrence probability is determined, a basis can be provided for subsequent improvement of the product, in an actual situation, the air leakage degree of different tested products is different, therefore, whether the tested product meets the air tightness requirement or not can be set, the air pressure change threshold value can be set, the tested product is judged not to meet the air tightness requirement only when the air pressure change exceeds the threshold value, and the air pressure change threshold value can be obtained through testing of qualified products.
According to the airtightness detection method provided by the embodiment of the invention, after the tested product coated with the film is placed in the closed environment, the closed environment is inflated or exhausted, the tested product in the airtightness test after inflation or exhaust is subjected to image acquisition, and whether the tested product meets the airtightness requirement is determined by analyzing the image.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention without limiting its scope. This invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents may be substituted for elements thereof. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.
Claims (20)
1. An airtightness detection apparatus, comprising: the control box is provided with a detection box, a driving assembly and an image acquisition device, wherein the detection box and the driving assembly are arranged on the control box;
the detection box can form a closed cavity under the action of the driving assembly, the cavity is used for accommodating at least one tested product, and an air inlet and outlet assembly communicated with the cavity is arranged in the control box;
the image acquisition device is used for acquiring images in the cavity in real time and carrying out image analysis when carrying out air tightness detection so as to output an image analysis result to determine the air tightness of a detected product;
the surface of the detected product is coated with a detection film, and the image acquisition device determines whether the detected product leaks air or not by analyzing whether the detection film in the acquired image deforms or not.
2. The airtightness detection apparatus according to claim 1, wherein the image acquisition device is disposed in the cavity, and a camera of the image acquisition device faces a detection position located in the cavity.
3. The airtightness detection apparatus according to claim 2, wherein the detection box includes a seat body and a cover body, the seat body is fixed on the control box, the cover body is fixedly connected to the driving assembly, and the driving assembly is configured to drive the cover body to move, so that the cover body abuts against or is separated from the seat body;
the image acquisition device is fixed on the inner wall of the seat body or the cover body, and the air inlet and outlet assembly is communicated with the inner cavity of the seat body.
4. The apparatus of claim 3, wherein a sealing member is disposed between the cover and the housing.
5. The apparatus of claim 3, wherein the driving assembly comprises a supporting member and a driving member fixed on the supporting member, and the driving member is fixedly connected to the cover.
6. The airtightness detection apparatus according to claim 5, wherein a buffer member is further provided on the support member, and the buffer member is configured to buffer a movement of the cover body when the driving member drives the cover body to separate from the base body.
7. The airtightness detection apparatus according to claim 1, wherein a protection member for protection against loading is further provided on the control box.
8. The airtightness detection apparatus according to claim 1, wherein the detection box is made of a transparent material, the image acquisition device is located on one side of the detection box, and a camera of the image acquisition device penetrates through a box body of the detection box and faces the detection position located in the cavity.
9. The airtightness detection apparatus according to any one of claims 2 to 6, wherein the number of the cameras is 1 to 4.
10. The airtightness detection apparatus according to any one of claims 1 to 8, further comprising an air pressure detection device, wherein the air pressure detection device is configured to collect air pressure in the cavity in real time during airtightness detection, so as to output an air pressure detection result, and determine the airtightness of the product to be detected in cooperation with the image analysis result.
11. The airtightness detection apparatus according to claim 10, wherein the air pressure detection device is an airtightness instrument independent from the detection box, the airtightness instrument inflates or evacuates the cavity through the air inlet/outlet assembly, and detects a change in air pressure in the cavity in real time after the inflation or evacuation.
12. The airtightness detection apparatus according to any one of claims 1 to 8, wherein the image acquisition device is electrically connected to a control component disposed in the control box;
the control assembly comprises a control panel and a button group connected with the control panel, and the button group is partially arranged through the box body of the control box.
13. The airtightness detection apparatus according to claim 12, wherein a display device and/or a speaker device connected to the control board is further provided on the casing of the control box.
14. An air tightness detection system, characterized by comprising a film covering device and the air tightness detection device according to any one of claims 1 to 13, wherein the film covering device is used for forming a detection film on the surface of a detected product before detection, and the detection film is deformed during the detection process when the air tightness of the detected product is unqualified.
15. The airtightness detection system according to claim 14, further comprising a loading and unloading device, wherein the loading and unloading device is configured to load the film-coated product to the cavity and remove the detected product from the cavity.
16. A airtightness detection method applied to the airtightness detection system according to claim 14 or 15, the method comprising:
carrying out film covering operation on a detected product to form a detection film on the surface of the detected product;
placing a product to be tested in the cavity to form a closed environment, and inflating or evacuating the cavity according to preset time;
after the inflation or the air exhaust is finished, maintaining the pressure of the cavity according to preset pressure maintaining time, and acquiring an image of a detected product in real time;
and analyzing the acquired image, judging that the air tightness of the detected product is unqualified when the detection membrane continuously deforms within the pressure maintaining time, determining an air leakage point of the detected product according to the deformation position of the detection membrane, and judging that the detected product is qualified if the detected product is not qualified.
17. The airtightness detection method according to claim 16, wherein, when the image of the product under test is acquired in real time, the method further comprises:
and detecting the air pressure in the cavity in real time, and determining the air tightness of the detected product according to the air pressure detection result and the image analysis result in the cavity.
18. The airtightness detection method according to claim 16 or 17, wherein the detection film is a flowable foam film or a flexible plastic film.
19. The airtightness detection method according to claim 18, wherein the thickness of the flowable foam film is 3 to 7 mm.
20. The airtightness detection method according to claim 16 or 17, wherein the pressure holding time for holding the cavity is 8 to 12 minutes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/092404 WO2020252788A1 (en) | 2019-06-21 | 2019-06-21 | Air tightness detection device, air tightness detection system and air tightness detection method |
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| CN111699372A CN111699372A (en) | 2020-09-22 |
| CN111699372B true CN111699372B (en) | 2022-05-17 |
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| WO (1) | WO2020252788A1 (en) |
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| CN112816151B (en) * | 2020-12-31 | 2023-07-14 | 深圳市鸿南电子有限公司 | MIC air tightness detection device and detection method |
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| CN113125085B (en) * | 2021-03-29 | 2023-10-20 | 西安西电避雷器有限责任公司 | Airtight water tank for detecting nonstandard production line of high-voltage circuit breaking device |
| CN113237604B (en) * | 2021-06-28 | 2022-12-06 | 苏州大学 | Equipment for inverter airtightness test and energization test |
| CN114088311A (en) * | 2021-11-03 | 2022-02-25 | 格林美(武汉)动力电池回收有限公司 | Method, system, equipment and storage medium for detecting box security |
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| CN111699372A (en) | 2020-09-22 |
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