Airflow and vision collaborative detection device for mask filter

Abstract

The utility model relates to an airflow and vision cooperative detection device for a mask filter, and the device comprises a positioning jig which is used for positioning the mask filter at a detection station; the positioning jig is provided with a positioning groove and an airflow channel, the positioning groove is used for positioning the mask filter, one end of the airflow channel communicates with the positioning groove, and the other end penetrates to the outer wall of the positioning jig to form an airflow opening; the abutting assembly is used for abutting the mask filter into the positioning groove of the positioning jig, and the abutting assembly is provided with a visual avoiding channel; the airflow detection mechanism is used for carrying out airflow detection on the mask filter through the airflow opening of the positioning jig; and when the abutting assembly abuts against the mask filter, the visual detection mechanism can conduct visual detection on the mask filter through the visual avoiding channel. According to the invention, airflow detection and visual detection can be synchronously completed at the detection station, and the detection efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of automated equipment, and in particular to an airflow and vision-based coordinated detection device for face mask filters. Background Technology

[0002] Face mask filters are one of the core components of respiratory protective equipment. Based on different performance designs and application scenarios, face mask filters are configured to filter particulate matter or specific gases / vapors. In related technologies, face mask filters mainly consist of a housing and a filter element housed within the housing. The housing comprises an interlocking bottom shell and a top cover. During face mask filter assembly, the filter element is first placed in the bottom shell, and then the top cover is fastened to the bottom shell to secure the filter element, thus completing the installation. For assembled face mask filters, robotic arms are typically used to place them one by one into different testing stations for inspection, which suffers from low testing efficiency and needs improvement. Utility Model Content

[0003] The purpose of this application is to provide an airflow and vision-based collaborative detection device for face mask filters. This collaborative detection device can simultaneously complete airflow and vision detection at the same workstation, effectively improving detection efficiency.

[0004] This application provides an airflow and vision-based coordinated detection device for face mask filters, which adopts the following technical solution:

[0005] An airflow and vision-based coordinated detection device for a face mask filter, comprising:

[0006] A positioning fixture is used to position a face mask filter at a testing station. The positioning fixture is provided with a positioning groove and an airflow channel. The positioning groove is used to position the face mask filter. One end of the airflow channel is connected to the positioning groove, and the other end extends through the outer wall of the positioning fixture to form an airflow opening.

[0007] A pressing assembly is used to press the mask filter against the positioning groove of the positioning fixture, and the pressing assembly is provided with a visual clearance channel;

[0008] An airflow detection mechanism is used to detect airflow through the airflow opening of the positioning fixture onto the face shield filter;

[0009] The visual inspection mechanism is capable of visually inspecting the face mask filter through the visual clearance channel when the pressure-reducing component presses against it.

[0010] By adopting the above technical solution, the position of the mask filter is first defined by the positioning fixture and the pressure component. Then, the airflow detection mechanism performs airflow detection on the mask filter through the airflow opening of the positioning fixture. At the same time, the vision inspection mechanism performs visual inspection on the mask filter through the visual clearance channel of the pressure component. Thus, airflow detection and visual inspection can be completed simultaneously at the same workstation, which effectively improves the inspection efficiency.

[0011] Furthermore, the airflow detection mechanism includes a filter tester, a movable tube, and a first driving member. One end of the movable tube is connected to the filter tester, and the other end is an open connecting end. The first driving member is used to drive the movable tube to move between a first position and a second position. When the movable tube is in the first position, the connecting end is spaced apart from the positioning fixture. When the movable tube is in the second position, the connecting end is used to abut against the positioning fixture and connect to the airflow opening.

[0012] Furthermore, the connecting end of the movable tube is provided with an annular seal surrounding the inner cavity of the movable tube. The annular seal protrudes at least partially from the end of the connecting end. When the movable tube is in the second position, the annular seal abuts against the positioning fixture and surrounds the airflow opening.

[0013] Furthermore, the portion of the annular seal protruding from the end of the connecting end includes an abutment platform, the abutment platform being platform-shaped, and the cross-section of the abutment platform gradually decreasing in the direction away from the connecting end.

[0014] Furthermore, the pressing assembly includes a pressing member and a pressing drive member, the pressing drive member being used to drive the pressing member to move in a direction close to or away from the face mask filter, so that the pressing member presses against or releases the face mask filter.

[0015] Furthermore, the pressing member includes a connecting arm and a pressing ring. The connecting arm is used to connect the pressing ring to the driving end of the pressing drive member. The annular end face of the pressing ring is used to press against the face mask filter. The annular cavity of the pressing ring forms a visual avoidance channel.

[0016] Furthermore, the visual inspection mechanism includes an inspection camera and an illumination source, the illumination source being used to illuminate the mask filter, and the inspection camera being used to take pictures of the mask filter through the visual avoidance channel.

[0017] Furthermore, the illumination source is a ring light source, and the ring light source has a ring channel corresponding to the visual avoidance channel. The detection camera can take pictures of the mask filter through the ring channel and the visual avoidance channel.

[0018] In summary, this application includes at least one of the following beneficial technical effects: firstly, the position of the mask filter is defined by the cooperation of the positioning fixture and the pressing component; then, the airflow detection mechanism performs airflow detection on the mask filter through the airflow opening of the positioning fixture; at the same time, the vision inspection mechanism performs visual inspection on the mask filter through the visual clearance channel of the pressing component, thereby enabling airflow detection and visual inspection to be completed simultaneously at the same workstation, thus effectively improving inspection efficiency. Attached Figure Description

[0019] Figure 1 This is a side view of the overall structure of the collaborative detection device in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the positioning fixture in the embodiments of this application;

[0021] Figure 3 This is a cross-sectional view of the positioning fixture in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram used to illustrate airflow detection in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the pressure-absorbing component in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the visual inspection mechanism in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram showing the visual inspection mechanism and the pressure-absorbing component from a low-angle view in an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Positioning fixture; 11. Positioning groove; 12. Airflow channel; 13. Airflow opening; 2. Pressing assembly; 21. Pressing component; 211. Connecting arm; 212. Pressing ring; 213. Annular cavity; 22. Pressing drive component; 3. Airflow detection mechanism; 31. Filter tester; 32. Movable tube; 321. Annular seal; 33. First drive component; 34. Connecting hose; 4. Vision inspection mechanism; 41. Inspection camera; 42. Illumination source; 421. Annular channel; 5. Frame; 51. First support; 52. Second support; 6. Face mask filter. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In related technologies, face mask filters mainly consist of a housing and a filter element housed within the housing. The housing comprises an interlocking bottom shell and a top cover. During the assembly process, the filter element is first placed in the bottom shell, and then the top cover is fastened to the bottom shell to secure the filter element, thus completing the installation. For assembled breathing face mask filters, automated quality inspection is required in two aspects: ventilation performance testing (e.g., air pressure, air resistance) and visual appearance inspection. Typically, robotic arms are used to place each filter individually into its corresponding inspection station for testing. The ventilation performance test usually employs a corresponding filter element ventilation resistance instrument to simulate the breathing resistance and gas exchange pressure difference as airflow passes through the filter during human respiration. Visual appearance inspection typically uses a corresponding visual inspection camera to check whether the filter is properly assembled and whether it is damaged, deformed, or has scratches.

[0031] This application discloses an airflow and vision-based detection device for a face mask filter.

[0032] Reference Figure 1The airflow and vision-based detection device for face mask filters includes a frame 5, a positioning fixture 1, a pressure assembly 2, an airflow detection mechanism 3, and a vision detection mechanism 4. The positioning fixture 1, the pressure assembly 2, the airflow detection mechanism 3, and the vision detection mechanism 4 are all mounted on the frame 5. The positioning fixture 1 and the pressure assembly 2 work together to limit the position of the face mask filter 6 at the detection station. The airflow detection mechanism 3 and the vision detection mechanism 4 then simultaneously perform airflow detection and vision detection at the detection station.

[0033] Specifically, refer to Figure 2 and Figure 3 The upper surface of the positioning fixture 1 is provided with a positioning groove 11 for positioning the face mask filter 6. The shape of the positioning groove 11 is adapted to the shape of the face mask filter 6 so that the face mask filter 6 can be stably held in the positioning fixture 1, thereby enabling the positioning fixture 1 to stably position the face mask filter 6 in the inspection station. Simultaneously, the positioning fixture 1 also has an airflow channel 12 inside. One end of the airflow channel 12 communicates with the bottom of the positioning groove 11, and the other end of the airflow channel 12 extends to the outer wall of the positioning fixture 1 to form an airflow opening 13. Figure 1 The pressing component 2 is used to press the face mask filter 6 against the positioning groove 11 of the positioning fixture 1, thereby ensuring stable operation during airflow detection. Correspondingly, the airflow detection mechanism 3 is used to perform airflow detection on the face mask filter 6 through the airflow opening 13 of the positioning fixture 1. At the same time, a visual clearance channel is also provided on the pressing component 2 to avoid obstructing the detection of the visual detection part of the face mask filter 6 during visual detection. Thus, when the pressing component 2 presses against the face mask filter 6, the visual detection mechanism 4 can perform visual detection on the face mask filter 6 through the visual clearance channel.

[0034] Using the above technology, the positioning fixture 1 and the pressing component 2 first cooperate to define the position of the mask filter 6. Then, the airflow detection mechanism 3 performs airflow detection on the mask filter 6 through the airflow opening 13 of the positioning fixture 1. At the same time, the vision inspection mechanism 4 performs visual inspection on the mask filter 6 through the visual clearance channel of the pressing component 2. Thus, airflow detection and visual inspection can be completed simultaneously at the same workstation, thereby effectively improving the inspection efficiency.

[0035] Reference Figure 4 and Figure 5In some embodiments, the pressing assembly 2 includes a pressing member 21 and a pressing drive member 22. The pressing drive member 22 is used to drive the pressing member 21 to move in a direction close to or away from the face mask filter 6, so that the pressing member 21 approaches the face mask filter 6 to press it, or moves away from the face mask filter 6 to release it. In a specific example, the pressing drive member 22 is configured as a cylinder. The pressing drive member 22 is fixedly connected to the frame 5 through a first bracket 51, and the piston rod of the cylinder of the pressing drive member 22 is arranged vertically so that the pressing member 21 presses against or releases the face mask filter 6 by the vertical movement of the pressing drive member 22. Furthermore, in some embodiments, the pressing member 21 includes a connecting arm 211 and a pressing ring 212. The connecting arm 211 is used to connect the pressing ring 212 to the end of the cylinder piston rod, which serves as the pressing drive member 22. The pressing ring 212 is ring-shaped and has an annular end face for pressing against the upper end face of the face mask filter 6, thereby preventing the face mask filter 6 from disengaging from the positioning groove 11 of the positioning fixture 1. At the same time, the pressing ring 212 has an annular cavity 213, which is used to form a visual clearance channel so that the visual inspection mechanism 4 can perform visual inspection on the face mask filter 6.

[0036] Reference Figure 1 and Figure 5 In some embodiments, the airflow detection mechanism 3 includes a filter tester 31, a movable tube 32, and a first drive component 33. The filter tester 31 is fixed on the frame 5. The movable tube 32 is horizontally arranged and can move relative to the frame 5. The position of the movable tube 32 corresponds to the position of the airflow opening 13 on the side wall of the positioning fixture 1. At the same time, the end of the movable tube 32 away from the positioning fixture 1 is connected to the filter tester 31 through a connecting hose 34, and the end of the movable tube 32 closer to the positioning fixture 1 is defined as the connecting end.

[0037] Accordingly, the first driving component 33 is a cylinder horizontally mounted on the first bracket 51. The piston rod end of the cylinder is fixedly connected to the movable tube 32 via a connecting plate, and the first driving component 33 is used to drive the movable tube 32 to move between a first position and a second position. (Refer to...) Figure 1 When the active tube 32 is in the first position, the connecting end has a distance from the positioning fixture 1, which is in the detection position and carries the mask filter 6; (Refer to...) Figure 4 When the movable tube 32 is in the second position, the connecting end is used to abut against the side wall of the positioning fixture 1 and connect to the airflow opening 13. At this time, the filter tester 31 is connected to the airflow channel 12 in the positioning fixture 1 through the movable tube 32 and the airflow opening 13. It is understood that the corresponding instrument disclosed on the market can be selected as the filter tester 31 based on the different filter elements of the filter being tested, and no specific limitation is made here.

[0038] Furthermore, it should be noted that in some specific examples, multiple sets of positioning fixtures 1 are configured, and positioning fixtures 1 are configured to move relative to the frame 5 via a turntable or conveyor track. Before the positioning fixture 1 carrying the mask filter 6 moves to the testing station, the movable tube 32 is in the first position to avoid scratching the moving positioning fixture 1; when the positioning fixture 1 carrying the mask filter 6 moves to the testing station, the movable tube 32 moves from the first position to the second position under the driving force of the first driving member 33, so that the filter tester 31 can be connected to the airflow channel 12 in the positioning fixture 1 through the movable tube 32 and the airflow opening 13; after the airflow test is completed, the movable tube 32 moves from the second position to the first position under the driving force of the first driving member 33, and then the positioning fixture 1 carrying the mask filter 6 moves away from the testing station.

[0039] Furthermore, combined Figure 4 and Figure 5 In some specific embodiments, the connecting end of the movable tube 32 is also fixedly embedded with an annular seal 321 arranged around the inner cavity of the movable tube 32. The annular seal 321 protrudes at least partially from the end of the connecting end. When the movable tube 32 is in the second position, the portion of the annular seal 321 protruding from the end of the connecting end abuts against the side wall of the positioning fixture 1 and surrounds the airflow opening 13 inside, so as to maintain the sealing of the movable tube 32 after it is connected to the airflow opening 13 during airflow detection, and avoid the situation where air pressure leakage reduces the detection accuracy. In some more specific embodiments, the portion of the annular seal 321 protruding from the end of the connecting end includes an abutment platform. The abutment platform is platform-shaped, and the cross-section of the abutment platform gradually decreases in the direction away from the connecting end.

[0040] Reference Figure 6 and Figure 7 In some embodiments, the visual inspection mechanism 4 includes an inspection camera 41 and an illumination source 42, both of which are mounted on the frame 5 via a second bracket 52. The illumination source 42 is positioned above the pressing member 21 and is used to illuminate the mask filter 6. The inspection camera 41 is positioned above the illumination source 42 and is used to take pictures of the mask filter 6 through a visual avoidance channel. The illumination source 42 is configured as a ring light source, capable of illuminating the mask filter 6 around it. The ring light source has a ring channel 421 corresponding to the visual avoidance channel, allowing the inspection camera 41 to take pictures of the mask filter 6 through the ring channel 421 and the visual avoidance channel.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for coordinated airflow and vision detection for a face mask filter, characterized in that, include: A positioning fixture is used to position a face mask filter at a testing station. The positioning fixture is provided with a positioning groove and an airflow channel. The positioning groove is used to position the face mask filter. One end of the airflow channel is connected to the positioning groove, and the other end extends through the outer wall of the positioning fixture to form an airflow opening. A pressing assembly is used to press the mask filter against the positioning groove of the positioning fixture, and the pressing assembly is provided with a visual clearance channel; An airflow detection mechanism is used to detect airflow through the airflow opening of the positioning fixture onto the face shield filter; The visual inspection mechanism is capable of visually inspecting the face mask filter through the visual clearance channel when the pressure-reducing component presses against it.

2. The airflow and vision-based coordinated detection device for a face mask filter according to claim 1, characterized in that, The airflow detection mechanism includes a filter tester, a movable tube, and a first driving component. One end of the movable tube is connected to the filter tester, and the other end is an open connecting end. The first driving component is used to drive the movable tube to move between a first position and a second position. When the movable tube is in the first position, the connecting end is spaced apart from the positioning fixture. When the movable tube is in the second position, the connecting end is used to abut against the positioning fixture and connect to the airflow opening.

3. The airflow and vision-based coordinated detection device for a face mask filter according to claim 2, characterized in that, The connecting end of the movable tube is provided with an annular seal surrounding the inner cavity of the movable tube. The annular seal protrudes at least partially from the end of the connecting end. When the movable tube is in the second position, the annular seal abuts against the positioning fixture and surrounds the airflow opening.

4. The airflow and vision-based coordinated detection device for a face mask filter according to claim 3, characterized in that, The annular seal includes an abutment platform protruding from the end of the connecting end. The abutment platform is platform-shaped, and its cross-section gradually decreases in the direction away from the connecting end.

5. The airflow and vision-based coordinated detection device for a face mask filter according to claim 1, characterized in that, The pressing assembly includes a pressing member and a pressing drive member. The pressing drive member is used to drive the pressing member to move in a direction close to or away from the face mask filter, so that the pressing member presses against or releases the face mask filter.

6. The airflow and vision-based coordinated detection device for a face mask filter according to claim 5, characterized in that, The pressing component includes a connecting arm and a pressing ring. The connecting arm is used to connect the pressing ring to the driving end of the pressing drive component. The annular end face of the pressing ring is used to press against the face mask filter. The annular cavity of the pressing ring forms a visual avoidance channel.

7. The airflow and vision-based coordinated detection device for a face mask filter according to claim 1, characterized in that, The visual inspection mechanism includes an inspection camera and an illumination source. The illumination source is used to illuminate the mask filter, and the inspection camera is used to take pictures of the mask filter through the visual avoidance channel.

8. The airflow and vision-based coordinated detection device for a face mask filter according to claim 7, characterized in that, The illumination source is a ring light source, and the ring light source has a ring channel corresponding to the visual avoidance channel. The detection camera can take pictures of the mask filter through the ring channel and the visual avoidance channel.

Images