Nonwoven fabric correction device and correction system for mask manufacturing

Abstract

The present invention relates to the technical field of mask production, and discloses a non-woven fabric deviation correction device and deviation correction system for mask manufacturing, including a machine body, a rotating table rotatably installed on the machine body, two rollers rotatably installed on the rotating table, a photoelectric sensor slidably installed on the machine body, a connecting block fixedly installed on the machine body, a connecting rod fixedly installed on the connecting block, mounting plates fixedly installed on both sides of the connecting rod, and pressure rollers fixedly installed on both mounting plates; an air supply pipe fixedly installed inside the rotating table, and shunt pipes are evenly and evenly inlaid on both sides of the air supply pipe; a blower is arranged on the rotating table, and the air outlet of the blower is connected to one end of the air supply pipe. The present invention realizes heat dissipation by spraying gas on the surface of the roller that rotates continuously, which can effectively improve the use environment of the equipment, ensure the stability of the equipment operation and extend its service life.

Description

Technical Field

[0001] The invention relates to the technical field of mask production, and in particular to a non-woven fabric deviation correction device and a deviation correction system for mask manufacturing. Background Art

[0002] Non-woven fabric, that is, non-textile fabric, is usually made of polypropylene (commonly known as PP) as the main raw material. It is produced in a continuous one-step process of high-temperature melting, spinning, and hot pressing and winding. In the production of masks, non-woven fabric needs to be transported. In this link, in order to ensure the quality of the masks produced, a correction device is needed.

[0003] The existing patent with announcement number CN216376836U discloses a non-woven fabric correction device for mask production, including a photoelectric sensor, a correction controller and several correction frames, the photoelectric sensor is electrically connected to the correction controller, the photoelectric sensor is located between the non-woven fabric roll and the first roll roller, and a correction frame is arranged between two adjacent second roll rollers. The correction frame includes a frame body, and an import roller and an export roller are arranged on the top of the frame body. The import roller and the export roller are arranged opposite to each other, and a rotating disk is arranged between the import roller and the export roller. The rotating disk is connected to the correction motor through a connecting shaft, and a track groove is opened on the rotating disk. A first detector and a second detector are arranged in the track groove. The first detector and the second detector are used to detect the distance between the edge of the current track groove and the first detector and the second detector.

[0004] However, there are still problems when using the above-mentioned device. In the process of mask manufacturing, the non-woven fabric may be positionally shifted during the transmission process. If not corrected in time, it may cause quality problems of the non-woven fabric, affecting the finished product qualification rate and performance of the masks made of non-woven fabric. There is a lack of a special correction system to monitor and adjust the position of the non-woven fabric in real time. At the same time, in the process of non-woven fabric transmission, the friction between the roller and the contact part of the non-woven fabric generates heat, which will affect the performance of the non-woven fabric or the correction device for a long time.

[0005] To this end, we propose a non-woven fabric correction device and correction system for mask manufacturing to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that in the process of mask manufacturing, the non-woven fabric may be positionally offset during the transmission process. If not corrected in time, it may cause quality problems of the non-woven fabric, and there is a lack of a special correction system to monitor and adjust the position of the non-woven fabric in real time; at the same time, in the process of non-woven fabric transmission, the contact part of the roller and the non-woven fabric generates heat due to friction, which will affect the performance of the non-woven fabric or the correction device for a long time; and a non-woven fabric correction device and correction system for mask manufacturing are proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A non-woven fabric deviation correction device and deviation correction system for mask manufacturing, comprising a machine body, a rotating table rotatably mounted on the machine body, two rollers rotatably mounted on the rotating table, a photoelectric sensor slidably mounted on the machine body, a connecting block fixedly mounted on the machine body, a connecting rod fixedly mounted on the connecting block, mounting plates fixedly mounted on both sides of the connecting rod, and pressure rollers fixedly mounted on both mounting plates;

[0009] An air delivery pipe is fixedly installed inside the rotating table, and diversion pipes are evenly and evenly inlaid on both sides of the air delivery pipe;

[0010] A blower is arranged on the rotating platform, and an air outlet of the blower is connected with one end of the air delivery pipe.

[0011] Preferably, two air guide plates are fixedly installed inside the machine body, the air guide plates are parallel to the curved portion of the air pipe, and there is a certain gap between the air guide plates and the rollers, so that the air guide plates will not directly contact the corresponding rollers.

[0012] Preferably, an exhaust fan is provided on the connecting block, the connecting block, the connecting rod, the mounting plate and the pressure roller are all hollow structures, and the air suction port of the exhaust fan is located inside the connecting block.

[0013] Preferably, the exhaust fan and the blower are both rotatably mounted with a rotating rod, a limit block is fixedly mounted on the rotating rod, and the quick-install plate is provided with a positioning groove adapted to the whole formed by the rotating rod and the limit block at a corresponding position.

[0014] Preferably, positioning plates are fixedly installed on both sides of the machine body, and threaded countersunk holes are evenly and equidistantly formed on the two positioning plates.

[0015] The present invention comprises a deviation detection module, a deviation correction analysis module, a deviation correction inspection module and a deviation correction adjustment module;

[0016] The offset detection module is used to collect edge information of the non-woven fabric edge; the edge information includes position and angle;

[0017] The deviation correction analysis module is used to receive and analyze the edge information of the non-woven fabric edge to obtain deviation information; the deviation information includes deviation value, measurement value and offset; the deviation information is normalized and calculated to obtain the deviation correction value; the deviation correction threshold is set, and the deviation correction value is compared with the deviation correction threshold. If the deviation correction value is less than the deviation correction threshold, no processing is performed; if the deviation correction value is greater than or equal to the deviation correction threshold, a deviation correction signal is generated;

[0018] When generating the correction process, the angle difference that the rotating table needs to rotate is calculated according to the correction value and the set correction coefficient; the actual rotation angle of the rotating table is obtained, and the angle adjustment calculation is performed on the actual rotation angle and the angle difference that needs to be rotated to obtain the angle adjustment value; an angle drive group is set, including a number of drive powers and corresponding drive durations; the angle adjustment value is matched with the value range of any combination in the angle drive group to obtain the corresponding drive power and drive duration;

[0019] The deviation correction inspection module is used to inspect and analyze the deviation correction process and obtain the real-time control coefficient of the deviation correction; set the control threshold, if the real-time control coefficient of the deviation correction is greater than or equal to its control threshold, then generate a real-time control signal; on the contrary, if the real-time control coefficient of the deviation correction is less than its control threshold, it means that the deviation correction inspection is qualified;

[0020] The real-time control coefficient of the deviation correction is used to trigger the driving power and driving duration of the rotating table;

[0021] The correction and adjustment module is used to receive corresponding signaling to perform corresponding operations, specifically:

[0022] After receiving the correction signaling to execute the correction process, the rotating table is controlled to operate according to the corresponding driving power and driving duration to achieve the angle difference required for controlling the rotation of the rotating table;

[0023] When the real-time control signal is received, the driving power and driving duration of the rotating table are adjusted according to the real-time control coefficient for correction.

[0024] Preferably, edge information of the edge of the non-woven fabric is received and analyzed, specifically:

[0025] The center line of the conveyor belt and the preset edge position of the non-woven fabric are set, and the distance between the center line of the conveyor belt and the edge position on either side of the non-woven fabric is calculated to obtain the center deviation value; the preset edge position of the non-woven fabric and its preset edge position are calculated to obtain the edge deviation value; the center deviation value and the edge deviation value are weighted to obtain the deviation value;

[0026] The end time of the correction process is obtained as the first time; if there is no correction process, the start time of the correction device is taken as the first time; the time range between the first time and the current time is marked as the detection time zone;

[0027] Obtain the edge angle of the non-woven fabric at any collection time in the detection time zone; set the angle upper limit threshold, calculate the difference between the edge angle and the angle upper limit threshold to obtain the angle trigger difference; perform normalization calculation on all the angle trigger differences in the detection time zone to obtain the angle deviation value; perform variance calculation on the angle trigger difference at any collection time in the detection time zone to obtain the angle fluctuation value; perform weighted calculation on the angle deviation value and the angle fluctuation value to obtain the measurement value;

[0028] The edge positions of the non-woven fabric at adjacent moments in the detection time zone are connected to obtain the actual edge line; the non-woven fabric travel cutoff line is set; the preset edge positions in the detection time zone are connected to obtain the preset edge line; the preset edge line, the actual edge line and the non-woven fabric travel cutoff line constitute an offset area; the area of ​​the offset area is calculated to obtain the offset; the deviation value, the measurement value and the offset are marked as deviation information.

[0029] Preferably, the deviation correction process is checked and analyzed, specifically:

[0030] The time when the correction process is generated is marked as the original correction time, and the original correction time and the current time are marked as the correction time zone;

[0031] Obtain the deviation correction value at any collection moment within the deviation correction time zone, calculate the difference between the deviation correction value and the preset deviation correction adjustment threshold, and obtain the deviation correction adjustment difference; calculate the variance of the deviation correction value within the deviation correction time zone to obtain the adjustment fluctuation value; then normalize the deviation correction adjustment difference and the adjustment fluctuation value to obtain the deviation correction real-time control coefficient.

[0032] Preferably, the present invention further comprises an alarm module;

[0033] The alarm module is used to perform alarm analysis on the correction process, obtain the number of corrections and the corresponding correction time in the non-woven fabric transmission process; set the standard correction time, subtract the standard correction time from the correction time to obtain the correction timeout value; pre-process the correction timeout value to obtain the correction mean, correction fluctuation value and correction extreme difference value; the pre-processing includes the calculation of the difference between the mean, variance and the maximum and minimum values; weighted calculation is performed on the correction mean, correction fluctuation value and correction extreme difference value to obtain the warning value; set the warning threshold, if the warning value is greater than or equal to the warning threshold, an abnormal correction alarm signal is issued.

[0034] Preferably, the present invention further comprises a data storage module, a display module and a remote access module;

[0035] A data storage module, used to store edge information, deviation information, correction value, and real-time control coefficient of the non-woven fabric;

[0036] A display module, used for accessing and displaying the information of the data storage module;

[0037] The remote module is used to remotely access and monitor the information in the data storage module, and can remotely control the display content and display mode of the display module.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention is provided with a rotating table, a roller, an air supply pipe, a shunt pipe, a positioning plate, a connecting rod, a mounting plate, a pressure roller, a threaded countersunk hole, a connecting block, an exhaust fan and a blower. The blower can absorb external air and transport it through the air supply pipe. Then the gas is sprayed on the surface of the roller through the shunt pipe respectively, and the roller is in a state of uninterrupted rotation, so the heat dissipation activity can effectively cover the entire roller, and the curved design and the air guide plate can effectively ensure that the airflow ejected from the shunt pipe can be completely sprayed on the surface of the roller, and the movement of the non-woven fabric can be minimized. By spraying gas on the surface of the uninterruptedly rotating roller, the heat dissipation activity is realized, which can effectively adjust the use environment of the equipment, ensure the stability of the equipment operation and extend its service life.

[0040] 2. The present invention uses a correction system, with the help of precise edge information collection and comprehensive and in-depth analysis, to accurately grasp the deviation status of the non-woven fabric, and then achieve precise correction operation on the non-woven fabric based on the deviation status. At the same time, with the help of the real-time correction control coefficient, the rotating table can be quickly adjusted according to the actual situation, thereby improving the automation level of non-woven fabric correction in the mask manufacturing process, effectively improving production efficiency, and effectively ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the non-woven fabric deviation correction device for mask manufacturing proposed by the present invention.

[0042] Figure 2 This is a schematic diagram of the back structure of the non-woven fabric correction device for mask manufacturing proposed by the present invention.

[0043] Figure 3 This is a schematic diagram of the internal structure of the rotating table of the non-woven fabric correction device for mask manufacturing proposed by the present invention.

[0044] Figure 4 This is a schematic diagram of the installation principle of the quick-install plate of the non-woven fabric correction device for mask manufacturing proposed by the present invention.

[0045] Figure 5 This is a principle block diagram of the correction system of the non-woven fabric correction device for mask manufacturing proposed by the present invention.

[0046] In the figure: 1. machine body; 2. rotating table; 3. roller; 4. air supply pipe; 5. shunt pipe; 6. photoelectric sensor; 7. positioning plate; 8. connecting rod; 9. mounting plate; 10. pressure roller; 11. threaded countersunk hole; 12. connecting block; 13. exhaust fan; 14. blower; 15. quick-install plate; 16. rotating rod; 17. limit block; 18. positioning groove; 19. filter; 20. air guide plate. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0048] See also Figures 1 to 5 , a non-woven fabric deviation correction device and a deviation correction system for mask manufacturing, comprising a body 1, a rotating table 2 is rotatably mounted on the body 1, two rollers 3 are rotatably mounted on the rotating table 2, and a photoelectric sensor 6 is slidably mounted on the body 1;

[0049] It should be noted that the distance of the photoelectric sensor 6 is precisely controlled by a micrometer; the photoelectric sensor 6 is used to detect the edge of the non-woven fabric in the conveying link. When an offset is detected, a command is sent to the controller inside the machine body 1 through the PLC. By rotating the turntable 2, the roller 3 may rotate with the turntable 2 at an angle, and this angle is proportional to the offset of the non-woven fabric, which can guide the non-woven fabric back to the center position to realize the deviation correction process.

[0050] A connecting block 12 is fixedly mounted on the machine body 1, a connecting rod 8 is fixedly mounted on the connecting block 12, mounting plates 9 are fixedly mounted on both sides of the connecting rod 8, and pressure rollers 10 are fixedly mounted on the two mounting plates 9;

[0051] It should be noted that by placing the non-woven fabric at the bottom of the pressure roller 10, the pressure roller 10 can provide tension for the non-woven fabric, so that the non-woven fabric and the roller 3 are correspondingly fitted, and then the movement of the non-woven fabric can cause the roller 3 to rotate through friction, and the deflection of the rotating table 2 and the roller 3 can drive the non-woven fabric to change its position, thereby realizing the correction process.

[0052] When the non-woven fabric moves, the roller 3 rotates due to friction, and the contact portion between the roller 3 and the non-woven fabric generates heat. If it is at a high temperature for a long time, it will affect the service life of the equipment.

[0053] An air delivery pipe 4 is fixedly installed inside the rotating table 2, and diversion pipes 5 are evenly and evenly inlaid on both sides of the air delivery pipe 4;

[0054] A blower 14 is disposed on the rotating platform 2 , and an air outlet of the blower 14 is connected to one end of the air delivery pipe 4 .

[0055] It should be noted that the blower 14 can absorb external air with a lower temperature and then transport it through the air pipe 4. The transported lower temperature gas is sprayed on the surface of the roller 3 through the diversion pipe 5. Since the roller 3 is in a state of uninterrupted rotation, the heat dissipation activity can effectively cover the entire roller 3.

[0056] It should be noted that the end of the diverter tube 5 facing away from the air supply pipe 4 is a curved structure, and the extension line of the center of the curved free end of the diverter tube 5 intersects with the line connecting the centers of the rollers 3, that is, in cross section, the diverter tube 5 is perpendicular to the tangent of the roller 3, which can effectively ensure that the airflow ejected from the diverter tube 5 can be completely sprayed on the surface of the roller 3, can minimize the influence on the movement of the non-woven fabric, and has a low loss rate.

[0057] In the present invention, two air guide plates 20 are fixedly installed inside the body 1. The air guide plates 20 are parallel to the curved portion of the air pipe 4, and there is a certain gap between the air guide plates 20 and the rollers 3. The air guide plates 20 will not directly contact the corresponding rollers 3, thereby avoiding friction and generating unnecessary heat.

[0058] It should be noted that, by means of the existence of the air guide plate 20, the gas ejected after performing the cooling activity can be guided to avoid contact with the non-woven fabric, blowing the non-woven fabric and affecting its normal movement.

[0059] In the present invention, an exhaust fan 13 is provided on the connecting block 12 . The connecting block 12 , the connecting rod 8 , the mounting plate 9 , and the pressure roller 10 are all hollow structures. The air suction port of the exhaust fan 13 is located inside the connecting block 12 .

[0060] It should be noted that the connecting block 12, the connecting rod 8, the mounting plate 9 and the pressing roller 10 are all hollow structures. The heat generated by friction on the hollow pressing roller 10 can be taken away by the movement of airflow, so that the pressing roller 10 that is in constant contact with the non-woven fabric maintains a low temperature, which is convenient to use.

[0061] It should be noted that the exhaust fan 13 and the blower 14 are both movably mounted with a quick-release plate 15 , on which a filter screen 19 is embedded and mounted, which can intercept dust, floating flocs and floating objects carried in the passing gas.

[0062] It should be noted that the quick-installation plate 15 can be quickly installed and disassembled, and the quick-installation plate 15 can be removed in time to clean the filter screen 19 thereon, which is convenient for daily use.

[0063] In the present invention, the exhaust fan 13 and the blower 14 are both rotatably mounted with a rotating rod 16, on which a limit block 17 is fixedly mounted, and the quick-release plate 15 is provided with a positioning groove 18 at a corresponding position that is compatible with the integral structure of the rotating rod 16 and the limit block 17.

[0064] It should be noted that when the limit block 17 is in an upward position, the whole formed by the rotating rod 16 and the limit block 17 can be smoothly inserted into the positioning groove 18. After the limit block 17 completely passes through the positioning groove 18, the rotating rod 16 can be rotated. The rotation of the rotating rod 16 causes the limit block 17 to be misaligned with the positioning groove 18, and the installation and disassembly activities can be quickly completed.

[0065] It should be noted that in order to further ensure the stability of the connection between the exhaust fan 13 and the blower 14 and the quick-install plate 15, they can be reinforced by magnetic attraction. Magnetic blocks are fixedly installed at corresponding positions on the housings of the exhaust fan 13 and the blower 14, and a magnetic attraction block is fixedly installed on the quick-install plate 15, so as to achieve a stable connection.

[0066] In the present invention, the number of the rotating rods 16 on the exhaust fan 13 and the blower 14 is two, and the two rotating rods 16 are located on a diagonal line.

[0067] It should be noted that the arrangement of the two rotating rods 16 on the diagonal line can ensure the stability and convenience of installation.

[0068] In the present invention, positioning plates 7 are fixedly installed on both sides of the machine body 1, and threaded countersunk holes 11 are evenly and equidistantly formed on the two positioning plates 7.

[0069] It should be noted that the presence of the positioning plate 7 and the threaded countersunk hole 11 allows the device to be easily fixedly mounted on the frame, thereby avoiding accidental displacement during operation that would affect use.

[0070] The working process of the present invention is as follows: first, the equipment is fixedly installed on the corresponding frame through the positioning plate 7 and the threaded countersunk hole 11, and then the non-woven fabric is placed so that the non-woven fabric is at the bottom of the two pressure rollers 10 and the upper surface of the two rollers 3, and then the corresponding pulling device is used to move it. When the non-woven fabric moves, the roller 3 will rotate due to friction.

[0071] The photoelectric sensor 6 is used to detect the edge of the non-woven fabric in the conveying link. When a deviation is detected, a command is sent to the controller inside the machine body 1 through the PLC. By rotating the turntable 2, the roller 3 may rotate with the turntable 2 at an angle that is proportional to the deviation of the non-woven fabric, guiding the non-woven fabric back to the center position to realize the deviation correction process.

[0072] When the equipment is running, the blower 14 can absorb the external air with lower temperature, and then transport it through the air pipe 4. The transported lower temperature gas is sprayed on the surface of the roller 3 through the diversion pipe 5. Since the roller 3 is in a state of uninterrupted rotation, the heat dissipation activity can effectively cover the entire roller 3, and the existence of the wind guide plate 20 can guide the gas ejected after the cooling activity to avoid it from contacting the non-woven fabric, blowing the non-woven fabric and affecting its normal movement.

[0073] Furthermore, the exhaust fan 13 can take away the heat generated by friction on the hollow pressing roller 10 through the movement of airflow, so that the pressing roller 10 that is in constant contact with the non-woven fabric maintains a low temperature, which is convenient for use.

[0074] When the filter 19 needs to be cleaned, the rotating rod 16 is rotated to make the limit block 17 in an upward state, and the entirety of the rotating rod 16 and the limit block 17 is aligned with the positioning groove 18, and the quick-install plate 15 can be directly removed for rapid disassembly.

[0075] The present invention comprises a deviation detection module, a deviation correction analysis module, a deviation correction inspection module and a deviation correction adjustment module;

[0076] The offset detection module is used to collect edge information of the non-woven fabric edge; the edge information includes position and angle;

[0077] It should be noted that the offset detection module includes but is not limited to a photoelectric sensor, and the edge information of the edge of the non-woven fabric is collected by the photoelectric sensor;

[0078] The correction analysis module is used to receive and analyze the edge information of the non-woven fabric edge to obtain the deviation information; the deviation information includes the deviation value GK, the measurement value KU and the offset PK; the deviation information is normalized and calculated, and the correction value PY is obtained using the formula PY=GK*y1+KU*y2+PK*y3; wherein y1, y2, and y3 represent the weights corresponding to the deviation value, the measurement value and the offset respectively; the correction threshold is set, and the correction value is compared with the correction threshold. If the correction value is less than the correction threshold, no processing is performed; if the correction value is greater than or equal to the correction threshold, a correction signal is generated;

[0079] When generating the correction process, the angle difference that the rotating table 2 needs to rotate is calculated according to the correction value and the set correction coefficient; the actual rotation angle of the rotating table 2 is obtained, and the angle adjustment calculation is performed on the actual rotation angle and the angle difference that needs to be rotated to obtain the angle adjustment value; an angle drive group is set, including a number of driving powers and corresponding driving durations; the angle adjustment value is matched with the value range of any combination in the angle drive group to obtain the corresponding driving power and driving duration;

[0080] It should be noted that the information of the edge of the non-woven fabric is collected through the offset detection module, and the accurate deviation information analysis is performed through the deviation correction analysis module to achieve precise deviation correction of the non-woven fabric and ensure the accuracy and stability of the mask manufacturing process.

[0081] The deviation correction inspection module is used to inspect and analyze the deviation correction process and obtain the real-time control coefficient of the deviation correction; set the control threshold, if the real-time control coefficient of the deviation correction is greater than or equal to its control threshold, then generate a real-time control signal; on the contrary, if the real-time control coefficient of the deviation correction is less than its control threshold, it means that the deviation correction inspection is qualified;

[0082] It should be noted that the correction inspection module can quickly adjust the driving power and driving duration of the rotating table 2 according to the real-time situation of the correction process to ensure that the correction effect of the non-woven fabric is always in the best state.

[0083] The correction and adjustment module is used to receive corresponding signaling to perform corresponding operations, specifically:

[0084] After receiving the correction signaling to execute the correction process, the rotating table 2 is controlled to operate according to the corresponding driving power and driving duration to achieve the angle difference required for the rotating table 2 to rotate;

[0085] When the real-time control signaling is received, the driving power and driving duration of the rotating platform 2 are adjusted according to the real-time control coefficient for correction.

[0086] It should be noted that the correction adjustment module can receive signals and perform corresponding operations to achieve automated operation and improve production efficiency, and through precise angle calculation and drive adjustment, the accuracy and stability of the correction operation are ensured.

[0087] In the present invention, edge information of the edge of the non-woven fabric is received and analyzed, specifically:

[0088] Set the center line of the conveyor belt and the preset edge position of the non-woven fabric, calculate the distance between the center line of the conveyor belt and the edge position on either side of the non-woven fabric to obtain the center deviation value GK1;

[0089] The difference between the preset edge position of the non-woven fabric and its preset edge position is calculated to obtain the edge deviation value GK2;

[0090] The center deviation value and the edge deviation value are weighted and calculated, and the deviation value GK is obtained using the formula GK=GK1*k1+GK2*k2; wherein k1 and k2 represent the weights of the center deviation value and the edge deviation value respectively;

[0091] The end time of the correction process is obtained as the first time; if there is no correction process, the start time of the correction device is taken as the first time; the time range between the first time and the current time is marked as the detection time zone;

[0092] Get the edge angle of the non-woven fabric at any collection time in the detection time zone; set the angle upper limit threshold, calculate the difference between the edge angle and the angle upper limit threshold to obtain the angle trigger difference K; normalize all the angle trigger differences in the detection time zone, and use the formula , obtain the angle deviation value KU1; wherein i represents the index of the collection time in the detection time zone, iK represents the angle trigger difference at the i-th collection time, and N represents the total number of collection times in the detection time zone;

[0093] The variance of the angle trigger difference at any acquisition time in the detection time zone is calculated using the formula , get the angle fluctuation value KU2; where, Indicates the mean value of the angle trigger difference within the detection time zone;

[0094] The angle deviation value and the angle fluctuation value are weighted and calculated, and the measurement value KU is obtained using the formula KU=KU1*u1+KU2*u2; wherein u1 and u2 represent the weights corresponding to the angle deviation value and the angle fluctuation value respectively;

[0095] The edge positions of the non-woven fabric at adjacent moments in the detection time zone are connected to obtain the actual edge line; the non-woven fabric travel cutoff line is set; the preset edge positions in the detection time zone are connected to obtain the preset edge line; the preset edge line, the actual edge line and the non-woven fabric travel cutoff line constitute an offset area; the area of ​​the offset area is calculated to obtain the offset PK; the deviation value, the measurement value and the offset are marked as deviation information.

[0096] In the present invention, the correction process is checked and analyzed, specifically:

[0097] The time when the correction process is generated is marked as the original correction time, and the original correction time and the current time are marked as the correction time zone;

[0098] Obtain the deviation correction value PY at any collection time in the deviation correction time zone, calculate the difference between the deviation correction value and the preset deviation correction adjustment threshold, and obtain the deviation correction adjustment difference JP1; calculate the variance of the deviation correction value in the deviation correction time zone, and use the formula , and obtain the adjusted fluctuation value JP2; where e represents the number of the collection time in the correction time zone, and E represents the total number of collection times in the correction time zone. It represents the mean value of the correction value in the correction time zone; then the correction adjustment difference and adjustment fluctuation value are normalized, and the correction real-time control coefficient JP is obtained using the formula JP=JP1*j1+JP2*j2; among them, j1 and j2 represent the weights corresponding to the correction adjustment difference and adjustment fluctuation value respectively.

[0099] In the present invention, the present invention further comprises an alarm module;

[0100] The alarm module is used to perform alarm analysis on the correction process, obtain the number of corrections and the corresponding correction time in the non-woven fabric transmission process; set the standard correction time, subtract the standard correction time from the correction time to obtain the correction timeout value; pre-process the correction timeout value to obtain the correction mean, correction fluctuation value and correction extreme difference value; the pre-processing includes the calculation of the difference between the mean, variance and the maximum and minimum values; weighted calculation is performed on the correction mean, correction fluctuation value and correction extreme difference value to obtain the warning value; set the warning threshold, if the warning value is greater than or equal to the warning threshold, an abnormal correction alarm signal is issued.

[0101] It should be noted that the introduction of the alarm module has significantly improved the functionality and practicality of the correction system. It can not only improve production efficiency and product quality, but also remind operators in time when problems occur, thereby reducing potential losses.

[0102] In the present invention, the present invention further comprises a data storage module, a display module and a remote access module;

[0103] A data storage module, used to store edge information, deviation information, correction value, and real-time control coefficient of the non-woven fabric;

[0104] A display module, used for accessing and displaying the information of the data storage module;

[0105] The remote module is used to remotely access and monitor the information in the data storage module, and can remotely control the display content and display mode of the display module.

[0106] It should be noted that the functionality and user interactivity of the correction system are further enhanced by introducing a data storage module, a display module and a remote access module.

[0107] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-woven fabric correction system for mask manufacturing, comprising a machine body (1) and a correction system, wherein a rotating table (2) is rotatably mounted on the machine body (1), two rollers (3) are rotatably mounted on the rotating table (2), and a photoelectric sensor (6) is slidably mounted on the machine body (1). It is characterized in that A connecting block (12) is fixedly mounted on the machine body (1), a connecting rod (8) is fixedly mounted on the connecting block (12), mounting plates (9) are fixedly mounted on both sides of the connecting rod (8), and pressure rollers (10) are fixedly mounted on both mounting plates (9); an air supply pipe (4) is fixedly mounted inside the rotating table (2), and flow divider pipes (5) are evenly and equidistantly inlaid on both sides of the air supply pipe (4); a blower (14) is arranged on the rotating table (2), and an air outlet of the blower (14) is connected to one end of the air supply pipe (4); The deviation correction system includes a deviation detection module, a deviation correction analysis module, a deviation correction inspection module and a deviation correction adjustment module; The offset detection module is used to collect edge information of the non-woven fabric edge; the edge information includes position and angle; The correction analysis module is used to receive and analyze the edge information of the non-woven fabric edge, specifically: The center line of the conveyor belt and the preset edge position of the non-woven fabric are set, and the distance between the center line of the conveyor belt and the edge position on either side of the non-woven fabric is calculated to obtain the center deviation value; the difference between the preset edge position of the non-woven fabric and its preset edge position is calculated to obtain the edge deviation value; Perform weighted calculation on the center deviation value and the edge deviation value to obtain the deviation value; Obtain the end time of the correction process as the first time; If there is no deviation correction process, the start time of the deviation correction device is taken as the first time; the time range between the first time and the current time is marked as the detection time zone; Obtaining the edge angle of the non-woven fabric at any collection time within the detection time zone; Set the angle upper threshold, calculate the difference between the edge angle and the angle upper threshold to obtain the angle trigger difference; perform normalization calculation on all angle trigger differences within the detection time zone to obtain the angle deviation value; perform variance calculation on the angle trigger difference at any acquisition time within the detection time zone to obtain the angle fluctuation value; The angle deviation value and the angle fluctuation value are weighted to obtain the measurement value; Connect the edge positions of the non-woven fabric at adjacent times within the detection time zone to obtain an actual edge line; Set the non-woven fabric advance cut-off line; Connecting the preset edge positions in the detection time zone to obtain a preset edge line; forming an offset region by the preset edge line, the actual edge line and the non-woven fabric advancing cut-off line; calculating the area of ​​the offset region to obtain an offset amount; Marking deviation values, metrics and offsets as deviation information; Normalize and calculate the deviation information to obtain the correction value; Set the deviation correction threshold, compare the deviation correction value with the deviation correction threshold, if the deviation correction value is less than the deviation correction threshold, no processing is performed; if the deviation correction value is greater than or equal to the deviation correction threshold, a deviation correction signaling is generated; When generating the correction process, the angle difference that the rotating table (2) needs to rotate is calculated based on the correction value and the set correction coefficient; the actual rotation angle of the rotating table (2) is obtained, and the angle adjustment calculation is performed on the actual rotation angle and the angle difference that needs to be rotated to obtain the angle adjustment value; Setting the angle drive group, including several drive powers and corresponding drive durations; Matching the angle adjustment value with the value range of any combination in the angle drive group to obtain the corresponding drive power and drive duration; The deviation correction inspection module is used to inspect and analyze the deviation correction process and obtain the real-time control coefficient of the deviation correction; Set a control threshold. If the real-time control coefficient of the deviation correction is greater than or equal to the control threshold, a real-time control signal is generated. On the contrary, if the real-time control coefficient of the deviation correction is less than its control threshold, it means that the deviation correction inspection is qualified; The real-time control coefficient for deviation correction is used to trigger the driving power and driving duration of the rotating table (2); The correction and adjustment module is used to receive corresponding signaling to perform corresponding operations, specifically: After receiving the correction signaling to execute the correction process, the rotating platform (2) is controlled to operate according to the corresponding driving power and driving duration, so as to realize the angle difference required for the rotating platform (2) to rotate; When the real-time control signal is received, the driving power and driving duration of the rotating platform (2) are adjusted according to the real-time control coefficient for deviation correction.

2. The non-woven fabric correction system for mask manufacturing according to claim 1, It is characterized in that Two air guide plates (20) are fixedly installed inside the machine body (1); the air guide plates (20) are parallel to the curved portion of the air delivery pipe (4); and there is a certain gap between the air guide plates (20) and the rollers (3); the air guide plates (20) will not directly contact the corresponding rollers (3).

3. The non-woven fabric correction system for mask manufacturing according to claim 1, It is characterized in that An exhaust fan (13) is arranged on the connecting block (12); the connecting block (12), the connecting rod (8), the mounting plate (9), and the pressure roller (10) are all hollow structures; and an air suction port of the exhaust fan (13) is located inside the connecting block (12).

4. The non-woven fabric correction system for mask manufacturing according to claim 3, It is characterized in that A rotating rod (16) is rotatably mounted on the exhaust fan (13) and the blower (14), a limit block (17) is fixedly mounted on the rotating rod (16), and a positioning groove (18) adapted to the whole formed by the rotating rod (16) and the limit block (17) is provided at a corresponding position on the quick-install plate (15).

5. The non-woven fabric correction system for mask manufacturing according to claim 1, It is characterized in that Positioning plates (7) are fixedly mounted on both sides of the machine body (1), and threaded countersunk holes (11) are evenly and equidistantly formed on the two positioning plates (7).

6. The nonwoven fabric correction system for mask manufacturing according to claim 1, It is characterized in that Check and analyze the deviation correction process, specifically: The time when the correction process is generated is marked as the original correction time, and the original correction time and the current time are marked as the correction time zone; Obtain the deviation correction value at any collection moment within the deviation correction time zone, calculate the difference between the deviation correction value and the preset deviation correction adjustment threshold, and obtain the deviation correction adjustment difference; calculate the variance of the deviation correction value within the deviation correction time zone to obtain the adjustment fluctuation value; then normalize the deviation correction adjustment difference and the adjustment fluctuation value to obtain the deviation correction real-time control coefficient.

7. The nonwoven fabric correction system for mask manufacturing according to claim 1, It is characterized in that Also includes an alarm module; The alarm module is used to perform alarm analysis on the correction process, obtain the number of corrections and the corresponding correction time in the non-woven fabric transmission process; set the standard correction time, and subtract the correction time from the standard correction time to obtain the correction timeout value; Preprocess the deviation correction timeout value to obtain the deviation correction mean, deviation correction fluctuation value and deviation correction extreme difference value; the preprocessing includes the calculation of the mean, variance and the difference between the maximum and minimum values; Perform weighted calculation on the deviation correction mean, deviation correction fluctuation value and deviation correction extreme value to obtain the warning value; Set the warning threshold. If the warning value is greater than or equal to the warning threshold, an abnormal correction alarm signal will be issued.

8. The nonwoven fabric correction system for mask manufacturing according to claim 1, It is characterized in that Also includes a data storage module, a display module and a remote access module; A data storage module, used to store edge information, deviation information, correction value, and real-time control coefficient of the non-woven fabric; A display module, used for accessing and displaying the information of the data storage module; The remote module is used to remotely access and monitor the information in the data storage module, and can remotely control the display content and display mode of the display module.

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