Film air permeability online detection and punching linkage device

Abstract

The invention relates to the technical field of thin film material processing, in particular to a thin film air permeability online detection and punching linkage device which comprises a rack, a punching assembly, a control assembly, a flow guide assembly, a rotating assembly and a conveying assembly, the punching assembly is arranged on one side of the rack, and the control assembly is arranged on the other side of the rack; a punching assembly is arranged on one side of the rack, a flow guide assembly is arranged on the inner side of the punching assembly, a rotating assembly is arranged on one side of the rack, a conveying assembly is arranged on one side of the rack, and the punching assembly comprises a connecting roller, a flow guide cavity pipe, a negative pressure pipe, a laser displacement sensor, a fixing frame, an electric telescopic rod and a signal transmitter. According to the invention, the negative pressure type online detection unit and the rotary punching unit are coaxially integrated, so that each detection point and the corresponding punching needle head are kept at an extremely small distance, and a real-time control system is matched, so that quick response from deformation detection to punching depth adjustment is realized, the waste generation distance is shortened, and the waste of raw materials is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thin film material processing, and particularly relates to a thin film air permeability online detection and punching linkage device. BACKGROUND

[0002] In the field of thin film material processing, air permeability is a key performance indicator for measuring the pore structure of the thin film, and directly affects the functional performance of the thin film in application scenarios such as packaging and filtering; the existing thin film punching equipment generally adopts an offline detection mode of first punching and then detecting or a design scheme of separating the online detection point from the punching point; a typical equipment structure includes a unwinding mechanism, a punching mechanism, a winding mechanism, and an air permeability detection unit independently arranged, and the working process is as follows: after the thin film is formed into micropores by the punching assembly, the thin film is wound into a film roll by the winding mechanism, and then the quality is verified by offline sampling detection or online non-contact detection device.

[0003] However, the traditional technical scheme has the problem of significant detection lag; when the offline detection mode is adopted, the unqualified products have been produced after the film roll is completed; even if the online non-contact detection is adopted, the detection point and the punching point usually maintain a distance of several meters, and under the condition of the running production line, the response delay from detection to execution adjustment is long, resulting in a long distance of unqualified thin film.

[0004] Therefore, in view of the above problems, the present application provides a thin film air permeability online detection and punching linkage device, which integrates a negative pressure type online detection unit and a rotary punching unit coaxially, so that each detection point and the corresponding punching needle head maintain a very small distance, and cooperates with a real-time control system to realize fast response from deformation detection to punching depth adjustment, shorten the waste product generation distance, and reduce material waste. SUMMARY

[0005] In order to overcome the problem of detection lag in the prior art that the air permeability detection is usually performed offline after punching or the online detection point is far away from the punching point when the thin film punching equipment punches the thin film, and a considerable length of unqualified thin film has been produced when the air permeability is detected to be unqualified, causing material waste.

[0006] The technical solution of the present invention is as follows: a film air permeability online detection and perforation linkage device, including a frame, a perforation component, a control component, a flow guiding component, a rotation component, and a conveying component. The perforation component is arranged on one side of the frame, and the control component is arranged on the other side of the frame. The flow guiding component is arranged inside the perforation component. The rotation component is arranged on one side of the frame, and the conveying component is arranged on one side of the frame. The perforation component includes a connecting roller, a flow guiding tube, a negative pressure tube, a laser displacement sensor, a fixing frame, an electric telescopic rod, and a signal transmitter. The connecting roller is arranged on one side of the frame. The connecting roller has a hollow structure. Multiple sets of flow guiding tubes are arranged inside the connecting roller. The multiple sets of flow guiding tubes are evenly distributed in a circumferential array on the inner wall of the connecting roller. Multiple sets of negative pressure tubes are arranged on one side of the flow guiding tubes. The negative pressure tubes penetrate the inner wall of the connecting roller. Multiple sets of laser displacement sensors are arranged on the outer side of the connecting roller. A fixing frame is arranged on one side of the laser displacement sensor. Multiple sets of electric telescopic rods are arranged inside the fixing frame. A perforation needle is arranged at one end of the electric telescopic rod. A signal transmitter is arranged on one side of the fixing frame.

[0007] Preferably, multiple sets of guide tubes distributed circumferentially inside the connecting roller form multiple independent negative pressure chambers. Each guide tube corresponds to a specific area on the surface of the connecting roller. Negative pressure tubes form independent detection units on the outer surface of the connecting roller. When the film moves above the corresponding negative pressure tube, a slight negative pressure is generated at the port of the tube, creating an adsorption force on the film surface. Under the action of the negative pressure, the film undergoes a concave deformation towards the negative pressure tube. The deformation of the film under the negative pressure is detected by a laser displacement sensor. The negative pressure tube, laser displacement sensor, and electric telescopic rod rotate coaxially and synchronously, ensuring that the detection point is always close to the perforation position. Under a specific negative pressure, there is a strong correlation between the film's deformation and its air permeability. The deformation detected by the laser displacement sensor is converted into an air permeability index to detect the corresponding area of ​​each negative pressure tube. The device measures the air permeability of the film in a specific region. Along the rotational direction of the connecting roller surface, each negative pressure tube is followed by a perforation unit consisting of an electric telescopic rod and a perforating needle. The electric telescopic rod extends and retracts to control the extension and retraction of the perforating needle for perforation. If the air permeability of the film in the corresponding region is detected to be low (i.e., excessive deformation), a signal transmitter receives a signal and sends a command to the corresponding perforation unit, increasing the extension and retraction of the electric telescopic rod to increase the perforation depth and improve the air permeability of the film in that region. Conversely, if the air permeability is detected to be high (i.e., insufficient deformation), the electric telescopic rod is controlled to reduce its extension and retraction to decrease the perforation intensity of the film in that region. The detection and perforation steps are performed almost simultaneously. Once a problem is detected, it can be immediately corrected at the same location, avoiding the production of a large number of defective products.

[0008] Preferably, the control components include a mounting plate and a controller. The mounting plate is located on one side of the frame, and the controller is located on the other side of the mounting plate. The controller is specifically a PLC programmable controller.

[0009] Preferably, the flow guiding assembly includes a fixed tube and a flow dividing tube. The fixed tube is provided inside the connecting roller, and multiple flow dividing tubes are provided on the side of the fixed tube. The multiple flow dividing tubes are connected to multiple flow guiding cavities.

[0010] Preferably, the flow guiding assembly also includes a connecting pipe and a bearing, with a connecting pipe provided at one end of the fixed pipe and a bearing provided at one end face of the connecting roller, and the connecting pipe and the bearing being connected to each other.

[0011] Preferably, the flow guiding assembly also includes a hose and an air pump. A hose is provided on the outside of the bearing, and the hose and the connecting pipe are interconnected. An air pump is provided at one end of the hose, and the input end of the hose and the air pump are connected to each other.

[0012] Preferably, the rotating assembly includes a drive motor and a first rotating shaft. The drive motor is located on one side of the frame, and the first rotating shaft is located at the output end of the drive motor. The first rotating shaft is connected to the connecting roller keyway.

[0013] Preferably, the conveying assembly includes a conveying motor and a second rotating shaft, with the conveying motor located on one side of the frame and the second rotating shaft located at the output end of the conveying motor.

[0014] Preferably, the conveyor motor also includes a conveyor roller, and the conveyor roller is connected to the outer keyway of the second shaft.

[0015] Preferably, the controller is used to analyze the laser displacement sensor data transmitted by the signal transmitter, and the specific steps include:

[0016] S101: Receives thin film deformation data detected by each laser displacement sensor in real time;

[0017] S102: Based on the preset deformation-permeability mapping relationship, the deformation data is converted into the permeability index of the corresponding area;

[0018] S103: Compare the air permeability index with the preset qualified threshold range to generate a qualified / unqualified judgment result for the air permeability of the area.

[0019] Preferably, the controller is used to transmit control commands to the signal transmitter, and the specific process includes:

[0020] S201: Based on the air permeability assessment, locate the perforation area that needs adjustment.

[0021] S202: If the air permeability is below the threshold range, a control command is generated to increase the extension and retraction of the electric telescopic rod; if the air permeability is above the threshold range, a control command is generated to decrease the extension and retraction of the electric telescopic rod.

[0022] S203: The control command is synchronously sent to the signal transmitter of the drilling area corresponding to the current rotation phase, driving the electric telescopic rod to adjust the puncture depth of the drilling needle in real time.

[0023] The beneficial effects of this invention are:

[0024] This invention utilizes multiple sets of guide tubes distributed circumferentially inside the connecting roller to form independent negative pressure chambers. Each guide tube corresponds to a specific area on the surface of the connecting roller. Negative pressure tubes form independent detection units on the outer surface of the connecting roller. When the film moves above the corresponding negative pressure tube, a slight negative pressure is generated at the tube's port, creating an adsorption force on the film surface. Under this negative pressure, the film undergoes a concave deformation towards the tube. A laser displacement sensor detects the deformation of the film under negative pressure. The negative pressure tubes, laser displacement sensor, and electric telescopic rod rotate coaxially and synchronously, ensuring the detection point is always close to the perforation position. Under specific negative pressure, there is a strong correlation between the film's deformation and its air permeability. The deformation detected by the laser displacement sensor is converted into an air permeability index to detect the corresponding area of ​​each negative pressure tube. To improve the film's air permeability, a perforation unit consisting of an electric telescopic rod and a perforating needle is located after each negative pressure tube in the rotation direction of the connecting roller surface. The electric telescopic rod extends and retracts to control the extension and retraction of the perforating needle for perforation. If the air permeability of the film in the corresponding area is detected to be low (i.e., excessive deformation), a signal is received through the signal transmitter and a command is sent to the corresponding perforation unit to increase the extension and retraction of the electric telescopic rod, thereby increasing the hole depth in that area and improving the air permeability. Conversely, if the air permeability is detected to be high (i.e., insufficient deformation), the extension and retraction of the electric telescopic rod is reduced to decrease the perforation intensity in that area. The detection and perforation steps of this device are performed almost simultaneously. Once a problem is detected, it can be corrected immediately at the same location where the problem occurred, avoiding the production of a large number of defective products. Attached Figure Description

[0025] Figure 1 The diagram shown is a first three-dimensional structural schematic of the online detection and perforation linkage device for thin film air permeability of the present invention.

[0026] Figure 2 The diagram shown is a first cross-sectional view of the online detection and perforation linkage device for thin film air permeability of the present invention.

[0027] Figure 3 The diagram shown is a second cross-sectional view of the online detection and perforation linkage device for thin film air permeability of the present invention.

[0028] Figure 4 The diagram shown is a partial cross-sectional view of the online detection and perforation linkage device for thin film air permeability of the present invention.

[0029] Figure 5The diagram shown is a partial three-dimensional structural schematic of the online detection and perforation linkage device for thin film air permeability of the present invention;

[0030] Figure 6 The diagram shown is a second three-dimensional structural schematic of the online detection and perforation linkage device for thin film air permeability of the present invention;

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 101. Connecting roller; 102. Guide tube; 103. Negative pressure tube; 104. Laser displacement sensor; 105. Fixing frame; 106. Electric telescopic rod; 107. Signal transmitter; 108. Perforating needle; 201. Mounting plate; 202. Controller; 301. Fixing tube; 302. Diverter tube; 303. Connecting tube; 304. Bearing; 305. Hose; 306. Air pump; 401. Drive motor; 402. First rotating shaft; 501. Conveyor motor; 502. Second rotating shaft; 503. Conveyor roller. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Please see Figure 1 and Figure 2This invention provides an embodiment of a membrane air permeability online detection and perforation linkage device, comprising a frame 1, a perforation assembly, a control assembly, a flow guiding assembly, a rotation assembly, and a conveying assembly. The perforation assembly is located on one side of the frame 1, and the control assembly is located on the other side. A flow guiding assembly is located inside the perforation assembly. A rotation assembly and a conveying assembly are located on one side of the frame 1. The perforation assembly includes a connecting roller 101, a flow guiding tube 102, a negative pressure tube 103, a laser displacement sensor 104, a fixing frame 105, an electric telescopic rod 106, and a signal transmitter 107. The connecting roller 101 is hollow and has multiple sets of flow guiding components inside. Multiple sets of guide tubes 102 are evenly distributed in a circumferential array on the inner wall of the connecting roller 101. Multiple sets of negative pressure pipes 103 are arranged on one side of each guide tube 102, penetrating the inner wall of the connecting roller 101. Multiple sets of laser displacement sensors 104 are arranged on the outer side of the connecting roller 101. A fixing frame 105 is arranged on one side of each laser displacement sensor 104. Multiple sets of electric telescopic rods 106 are arranged on the inner side of the fixing frame 105. A punching needle 108 is provided at one end of each electric telescopic rod 106. A signal transmitter 107 is arranged on one side of the fixing frame 105. The multiple sets of guide tubes 102 distributed circumferentially inside the connecting roller 101 form multiple independent negative pressure chambers. Each guide tube 102 corresponds to a surface of the connecting roller 101. In a specific area, the negative pressure tube 103 forms an independent detection unit on the outer surface of the connecting roller 101. When the film runs above the corresponding negative pressure tube 103, a small negative pressure is generated at the port of the negative pressure tube 103, which generates an adsorption force on the film surface. Under the action of the negative pressure, the film undergoes a concave deformation towards the negative pressure tube 103. The deformation of the film under the action of the negative pressure is detected by the laser displacement sensor 104. The negative pressure tube 103, the laser displacement sensor 104, and the electric telescopic rod 106 rotate coaxially and synchronously, so that the detection point is always close to the perforation position. Under a specific negative pressure, there is a strong correlation between the deformation of the film and the air permeability of the film. The deformation detected by the laser displacement sensor 104 is converted into an air permeability index to detect each negative pressure. Regarding the air permeability performance of the film in the area corresponding to tube 103, in the rotation direction of the connecting roller 101, there is a punching unit consisting of an electric telescopic rod 106 and a punching needle 108 after each negative pressure tube 103. The extension and retraction of the electric telescopic rod 106 controls the extension and retraction of the punching needle 108 to perform punching. If the air permeability of the film in the corresponding area is detected to be low, that is, the deformation is too large, the signal transmitter 107 receives the signal and sends an instruction to the corresponding punching unit to increase the extension and retraction of the corresponding electric telescopic rod 106, thereby increasing the hole depth of the film in that area and improving the air permeability of the film in that area. Conversely, if the air permeability is detected to be high, that is, the deformation is small, the extension and retraction of the corresponding electric telescopic rod 106 is reduced to reduce the punching intensity of the film in that area.

[0034] Please seeFigure 3 and Figure 4 In this embodiment, the control component includes a mounting plate 201 and a controller 202. The mounting plate 201 is located on one side of the frame 1, and the controller 202 is located on the other side of the mounting plate 201. Specifically, the controller 202 is a PLC programmable controller 202. The controller 202 receives the film deformation signal generated by the signal transmitter 107 and transmits the control signal to the signal transmitter 107. The flow guiding component includes a fixed tube 301 and a flow splitter tube 302. The fixed tube 301 is located inside the connecting roller 101, and multiple flow splitter tubes 302 are located on the side of the fixed tube 301. These multiple flow splitter tubes 302 are interconnected with multiple sets of flow guiding chambers 102. The flow guiding component also includes a connecting tube 303 and a bearing 304. A connecting pipe 303 is provided at one end of the fixed pipe 301, and a bearing 304 is provided at one end face of the connecting roller 101. The connecting pipe 303 and the bearing 304 are connected to each other. The flow guiding assembly also includes a hose 305 and an air pump 306. A hose 305 is provided on the outside of the bearing 304. The hose 305 and the connecting pipe 303 are interconnected. An air pump 306 is provided at one end of the hose 305. The hose 305 and the input end of the air pump 306 are connected to each other. In use, by starting the air pump 306, a negative pressure airflow is generated at the inlet of the negative pressure pipe 103. The airflow is input to the air pump 306 along the flow guiding chamber pipe 102, the diversion pipe 302, the fixed pipe 301, the connecting pipe 303 and the hose 305, and discharged from the output end of the air pump 306.

[0035] Please see Figure 5 and Figure 6 In this embodiment, the rotating assembly includes a drive motor 401 and a first rotating shaft 402. The drive motor 401 is provided on one side of the frame 1, and the first rotating shaft 402 is provided at the output end of the drive motor 401. The first rotating shaft 402 is connected to the connecting roller 101 by a keyway. In use, the drive motor 401 is started to drive the first rotating shaft 402 to rotate, and the rotation of the first rotating shaft 402 drives the connecting roller 101 to rotate. The conveying assembly includes a conveying motor 501 and a second rotating shaft 502. The conveying motor 501 is provided on one side of the frame 1, and the second rotating shaft 502 is provided at the output end of the conveying motor 501. The conveying motor 501 also includes a conveying roller 503. The conveying roller 503 is connected to the outer side of the second rotating shaft 502 by a keyway. In use, the film to be processed is conveyed by the rotation of multiple sets of conveying rollers 503.

[0036] The controller 202 is used to analyze the data from the laser displacement sensor 104 transmitted by the signal transmitter 107. Specific steps include:

[0037] S101: Receives thin film deformation data detected by each laser displacement sensor 104 in real time;

[0038] S102: Based on the preset deformation-permeability mapping relationship, the deformation data is converted into the permeability index of the corresponding area;

[0039] S103: Compare the air permeability index with the preset qualified threshold range to generate a qualified / unqualified judgment result for the air permeability of the area.

[0040] The controller 202 is used to transmit control commands to the signal transmitter 107, and the specific process includes:

[0041] S201: Based on the air permeability assessment, locate the perforation area that needs adjustment.

[0042] S202: If the air permeability is below the threshold range, a control command is generated to increase the extension amount of the electric telescopic rod 106; if the air permeability is above the threshold range, a control command is generated to decrease the extension amount of the electric telescopic rod 106.

[0043] S203: The control command is synchronously sent to the signal transmitter 107 of the punching area corresponding to the current rotation phase, driving the electric telescopic rod 106 to adjust the puncture depth of the punching needle 108 in real time.

[0044] During operation, the fixed pipe 301 forms a sealed connection with the guide cavity pipe 102 inside the connecting roller 101 through the diverter pipe 302; the end of the fixed pipe 301 is connected to the stainless steel connecting pipe 303 through a rotary joint, and the connecting pipe 303 is connected to the hose 305, the end of the hose 305 is connected to the air pump 306; when the air pump 306 is running, a stable negative pressure field is formed at the port of the negative pressure pipe 103; the rotating component is driven by a servo motor, and the power is transmitted to the first rotating shaft 402 at the end of the connecting roller 101 through a synchronous belt transmission mechanism to achieve stepless speed regulation; the conveying component uses four sets of independently driven conveying rollers 503 to convey the film, ensuring that the film and the surface of the connecting roller 101 maintain a constant contact pressure;

[0045] The laser displacement sensor 104 collects film deformation data in real time. When the deformation of a certain area exceeds the preset threshold, an interrupt signal is immediately triggered. The deformation-permeability conversion algorithm built into the controller 202 converts the deformation data into permeability values ​​by looking up a table and compares them with the qualified range in the process parameter library. According to the deviation direction, the controller 202 drives the electric telescopic rod 106 to make dynamic adjustments by sending a pulse width modulation signal to the signal transmitter 107 at the corresponding phase position.

[0046] When the air permeability of a certain area is detected to be low, the controller 202 completes a full closed-loop control: signal acquisition → data analysis → instruction generation → actuator response, which increases the penetration depth of the punching needle 108 and achieves real-time correction of air permeability by adjusting the needle stroke.

[0047] Through the above steps, multiple sets of guide tubes 102 distributed circumferentially inside the connecting roller 101 form multiple independent negative pressure chambers. Each guide tube 102 corresponds to a specific area on the surface of the connecting roller 101. Negative pressure tubes 103 form independent detection units on the outer surface of the connecting roller 101. When the film runs above the corresponding negative pressure tube 103, a small negative pressure is generated at the port of the negative pressure tube 103, creating an adsorption force on the film surface. Under the action of the negative pressure, the film undergoes a concave deformation towards the negative pressure tube 103. The deformation of the film under the action of the negative pressure is detected by a laser displacement sensor 104. The negative pressure tube 103, the laser displacement sensor 104, and the electric telescopic rod 106 rotate coaxially and synchronously, ensuring that the detection point is always close to the perforation position. Under a specific negative pressure, there is a strong correlation between the film's deformation and its air permeability. The deformation detected by the laser displacement sensor 104 is converted into an air permeability index for each... Regarding the film permeability performance of the area corresponding to each negative pressure tube 103, in the rotation direction of the connecting roller 101, there is a punching unit consisting of an electric telescopic rod 106 and a punching needle 108 after each negative pressure tube 103. The extension and retraction of the electric telescopic rod 106 controls the extension and retraction of the punching needle 108 to perform punching. If the film permeability of the corresponding area is detected to be low, i.e., the deformation is too large, the signal transmitter 107 receives the signal and sends an instruction to the corresponding punching unit to increase the extension and retraction of the corresponding electric telescopic rod 106, thereby increasing the hole depth of the film in that area and improving the film permeability of that area. Conversely, if the film permeability is detected to be high, i.e., the deformation is small, the extension and retraction of the corresponding electric telescopic rod 106 is reduced to decrease the punching intensity of the film in that area. The detection step and the punching step of this device are almost synchronized. Once a problem is detected, it can be corrected immediately at the same location where the problem occurred, avoiding the production of a large number of defective products.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A membrane air permeability online detection and perforation linkage device, comprising a frame (1), characterized in that: It also includes a punching assembly, a control assembly, a flow guiding assembly, a rotating assembly, and a conveying assembly. The punching assembly is provided on one side of the frame (1), and the control assembly is provided on the other side of the frame (1). The flow guiding assembly is provided inside the punching assembly. The rotating assembly is provided on one side of the frame (1), and the conveying assembly is provided on one side of the frame (1). The punching assembly includes a connecting roller (101), a flow guiding tube (102), a negative pressure tube (103), a laser displacement sensor (104), a fixing frame (105), an electric telescopic rod (106), and a signal transmitter (107). The connecting roller (101) is provided on one side of the frame (1). The connecting roller (101) has a hollow structure. Multiple sets of guide tubes (102) are provided on the inner side of the connecting roller (101). The multiple sets of guide tubes (102) are evenly distributed in a circumferential array on the inner wall of the connecting roller (101). Multiple sets of negative pressure tubes (103) are provided on one side of the guide tubes (102). The negative pressure tubes (103) penetrate the inner wall of the connecting roller (101). Multiple sets of laser displacement sensors (104) are provided on the outer side of the connecting roller (101). A fixing frame (105) is provided on one side of the laser displacement sensor (104). Multiple sets of electric telescopic rods (106) are provided on the inner side of the fixing frame (105). A punching needle (108) is provided at one end of the electric telescopic rod (106). A signal transmitter (107) is provided on one side of the fixing frame (105).

2. The online detection and perforation linkage device for membrane air permeability according to claim 1, characterized in that: The control components include a mounting plate (201) and a controller (202). The mounting plate (201) is provided on one side of the frame (1), and the controller (202) is provided on one side of the mounting plate (201). The controller (202) is specifically a PLC programmable controller (202).

3. The online detection and perforation linkage device for membrane air permeability according to claim 1, characterized in that: The flow guiding assembly includes a fixed tube (301) and a flow dividing tube (302). The fixed tube (301) is provided inside the connecting roller (101). Multiple flow dividing tubes (302) are provided on the side of the fixed tube (301). The multiple flow dividing tubes (302) are connected to multiple flow guiding cavity tubes (102) respectively.

4. The online detection and perforation linkage device for membrane air permeability according to claim 3, characterized in that: The flow guiding assembly also includes a connecting pipe (303) and a bearing (304). One end of the fixed pipe (301) is provided with a connecting pipe (303), and one end face of the connecting roller (101) is provided with a bearing (304). The connecting pipe (303) and the bearing (304) are connected to each other.

5. The online detection and perforation linkage device for membrane air permeability according to claim 4, characterized in that: The flow guiding assembly also includes a hose (305) and an air pump (306). The hose (305) is provided on the outside of the bearing (304). The hose (305) and the connecting pipe (303) are interconnected. An air pump (306) is provided at one end of the hose (305). The input ends of the hose (305) and the air pump (306) are connected to each other.

6. The online detection and perforation linkage device for membrane air permeability according to claim 1, characterized in that: The rotating assembly includes a drive motor (401) and a first rotating shaft (402). The drive motor (401) is provided on one side of the frame (1), and the first rotating shaft (402) is provided at the output end of the drive motor (401). The first rotating shaft (402) is connected to the connecting roller (101) by a keyway.

7. The online detection and perforation linkage device for membrane air permeability according to claim 1, characterized in that: The conveying assembly includes a conveying motor (501) and a second rotating shaft (502). The conveying motor (501) is provided on one side of the frame (1), and the output end of the conveying motor (501) is provided with the second rotating shaft (502).

8. The online detection and perforation linkage device for membrane air permeability according to claim 7, characterized in that: The conveyor motor (501) also includes a conveyor roller (503), and the conveyor roller (503) is connected to the keyway on the outer side of the second rotating shaft (502).

9. The online detection and perforation linkage device for membrane air permeability according to claim 2, characterized in that: The controller (202) is used to analyze the data from the laser displacement sensor (104) transmitted by the signal transmitter (107), and the specific steps include: S101: Receives thin film deformation data detected by each laser displacement sensor (104) in real time; S102: Based on the preset deformation-permeability mapping relationship, the deformation data is converted into the permeability index of the corresponding area; S103: Compare the air permeability index with the preset qualified threshold range to generate a qualified / unqualified judgment result for the air permeability of the area.

10. The online detection and perforation linkage device for membrane air permeability according to claim 9, characterized in that: The controller (202) is used to transmit control commands to the signal transmitter (107), and the specific process includes: S201: Based on the air permeability assessment, locate the perforation area that needs adjustment. S202: If the air permeability is below the threshold range, a control command is generated to increase the extension amount of the electric telescopic rod (106); if the air permeability is above the threshold range, a control command is generated to decrease the extension amount of the electric telescopic rod (106). S203: The control command is synchronously sent to the signal transmitter (107) of the punching area corresponding to the current rotation phase, and the electric telescopic rod (106) is driven to adjust the puncture depth of the punching needle (108) in real time.

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