An online correction system and correction method for groove displacement of filter rods in a forming machine

Abstract

The present invention relates to the technical field of cigarette filter rod production, and in particular to an online correction system for groove displacement of filter rods of a forming machine and a correction method thereof. The system includes an acetate fiber bundle input port, a groove embossing module, a filter rod cutting mechanism, a filter rod output port, a control module, an image acquisition component, and a rejection device; the control module controls the image acquisition component to acquire a filter rod groove position image, and processes the image data; if filter rod groove displacement occurs, the groove embossing module is used to correct it, and the rejection device is controlled to reject unqualified filter rods at the same time; the present invention realizes real-time quality detection of groove displacement of intermittent groove filter rods produced online by a forming machine, displacement display, online correction of groove displacement, and tracking and rejection control of unqualified filter rods whose groove displacement deviation exceeds the range.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette filter rod production, and in particular to an online correction system for groove displacement of a filter rod of a forming machine and a correction method thereof. Background Art

[0002] like Figure 6 As shown, the intermittent groove filter rod (5) is a special specification filter rod. Based on the ordinary filter rod production process, a layer of cellulose paper (52) with groove embossed sections (54) intermittently embossed by an embossing device is added between the acetate fiber tow (51) and the forming paper (53), thereby producing this special filter rod. In the intermittent groove filter rod production process of the forming machine, each time the equipment is started, the groove embossing module, the forming machine and the filter rod cutting mechanism will be self-synchronized. If there is a deviation in the synchronization, the groove embossed section of the intermittent groove filter rod will be displaced, which is a common problem in the industry. In view of the current situation in which the position of the groove embossing section in the production of discontinuous groove filter rods is too large and cannot be found intuitively, operators usually take samples and cut open the filter rods to measure, detect and confirm the position of the groove embossing section, which is time-consuming and labor-intensive, resulting in great difficulty in online quality control of the production of discontinuous groove filter rods. Usually, when it is discovered, a large number of unqualified filter rods have been produced, which is a great waste of resources. Even if unqualified filter rods are found, it is difficult to know from which section the displacement begins, and it is difficult to accurately remove unqualified filter rods. Once the filter rod with the displaced groove embossing section flows into the packaging process, it will cause unstable cigarette draw resistance (the grooves of the cigarette filter rods are uneven in length, such as : If the groove section of a 10mm cigarette is displaced by 3mm, then after the double cigarette is cut, the length of the filter groove of the two cigarettes will be 2mm and 8mm respectively), which directly affects the quality of consumers' smoking and ultimately damages the brand image of cigarettes. Since the discontinuous groove filter rod is a new type of filter rod, in the related detection technology of groove filter rods at home and abroad, the offline detection technology of the groove cross section after the groove filter rod is cut has been realized: the number of grooves, groove depth, and groove specific surface area can be detected, and then the detected groove physical parameters are compared with the groove design value to determine whether the filter rod groove parameters meet the standards, and then the quality of the filter rod is determined. However, there is no relevant technology to realize the online detection of the groove displacement of the discontinuous filter rod, which is very unfavorable for the observation and control of the production quality of the discontinuous groove filter rod. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a filter rod groove displacement online correction system and correction method for a forming machine. The control module controls the image acquisition component to collect the filter rod groove position image and process the image data. If the filter rod groove displacement occurs, the groove embossing module is used to correct it, and the rejection device is controlled to reject unqualified filter rods. The specific contents are as follows:

[0004] An online correction system for groove displacement of filter rods of a forming machine, comprising an acetate fiber tow input port, a groove embossing module, a filter rod cutting mechanism, a filter rod output port, a control module, an image acquisition component, and a rejection device;

[0005] The image acquisition component is arranged and installed outside the filter rod entry channel of the filter rod cutting mechanism, and includes a visual detection unit, a light source, a detection unit mounting bracket, and a light source mounting bracket; the detection unit mounting bracket is arranged and installed on the molding machine, and is used to set up the image detection unit, and the light source mounting bracket is arranged and installed on the molding machine, and is used to install the light source; the image acquisition component can perform online acquisition of the filter rod groove position;

[0006] The groove embossing module includes an embossing roller, a driven wheel, an embossing roller driving servo motor, and a motion function control module. The surface of the embossing roller is provided with an embossing section. The embossing roller driving servo motor drives the embossing roller to rotate and roll the cellulose paper passing through to form groove embossing. The motion function control module includes an encoder, an offset bias loop, a position synchronization sequence generator, and a servo system.

[0007] The control module includes a molding machine encoder, a PLC control system, a molding machine electronic control PLC system, an I / O module, an industrial computer, and a groove embossing device control system; the control module controls the visual acquisition unit to acquire a filter rod groove position image and processes the image data; if filter rod groove displacement occurs, the groove embossing device control system changes the rotation speed of the embossing roller driving servo motor, thereby changing the position of the groove embossing, adjusting the distance from the groove section to the filter rod cutting mechanism, and correcting the filter rod groove displacement.

[0008] Furthermore, the image acquisition component also includes a convex lens and a light source cover; the light source cover is installed on the light source bracket, the light source is installed inside the light source cover, the light direction is upward, and a hole is opened on the top of the light source cover for installing the convex lens, and the filter rod to be tested passes through the upper surface of the convex lens.

[0009] Furthermore, the visual inspection unit includes an industrial linear array camera and a lens; after the industrial linear array camera and the lens are assembled and installed downward in a photographing direction, the camera is located above the filter rod to be tested and opposite to the light direction of the light source.

[0010] Furthermore, the rejection device is arranged at the filter rod output port, including a collecting drum, a rejecting drum, a discharging drum, and a garbage box; the collecting drum is installed behind the filter rod cutting mechanism, the rejecting drum is installed adjacent to the collecting drum, the discharging drum is installed adjacent to the rejecting drum, and the garbage box is installed directly below the rejecting drum, and the cut filter rods are adsorbed and transferred by controlling the high-pressure airflow to form a negative pressure.

[0011] Furthermore, the rejection device is also provided with a sampling drum and a sampling box; the sampling drum is adjacently arranged and installed below the side of the rejection drum, and the sampling box is installed directly below the sampling drum.

[0012] Furthermore, the PLC control system is respectively connected to the molding machine encoder, the molding machine electrical control PLC system, the I / O module, the light source, and the visual inspection unit; the molding machine electrical control PLC system is connected to the rejection device; the visual inspection unit is respectively connected to the molding machine encoder and the industrial computer; the industrial computer is respectively connected to the I / O module, the host system, and the groove embossing device control system.

[0013] Furthermore, the light source is a cold light source.

[0014] A correction method for an online correction system of a filter rod groove displacement of a forming machine comprises the following steps:

[0015] S1: The filter rod cutting mechanism signal is collected by the PLC control system and then sent to the visual inspection unit as a start or end scanning signal;

[0016] S2: Sending a pulse signal through the encoder of the molding machine to allow the image acquisition component to scan the filter rod to be tested according to the pulse, forming image data, and sending it to the industrial computer;

[0017] S3: the industrial computer performs recognition and calculation on the obtained image data, and determines the displacement degree of the filter rod groove in combination with the filter rod cutting mechanism signal;

[0018] S4: The industrial computer sends a correction signal to the groove embossing module through calculation. After calculation by the motion function control module, the speed of the embossing roller driving servo motor is changed, thereby changing the position of the groove embossing, adjusting the distance from the groove section to the filter rod cutting mechanism, and correcting the filter rod groove displacement.

[0019] Furthermore, it also includes:

[0020] S5, said step S5 is between S3-S4, if the displacement degree exceeds the limit value, the industrial computer sends a signal to the I / O module, the I / O module converts the signal and sends it to the PLC control system, the PLC control system sends a signal to the molding machine electronic control PLC system, the molding machine electronic control PLC system converts the signal and sends it to the rejection device, the rejection device is started to reject the filter rod whose displacement degree exceeds the limit value, if the displacement degree does not exceed the limit value, S5 is not executed.

[0021] The working principle of the present invention is as follows:

[0022] The motion control of the forming machine uses an encoder to control the embossing roller drive servo motor 33 of the groove embossing module 3 to perform synchronous paper feeding. The system synchronously collects the current position data s0 of the forming machine at time t0 through the encoder, and obtains the main speed data v0 of the current cycle after derivation of the position signal according to time. The speed value v0 and the position value s0 are sent to the embossing roller drive servo motor 33 for groove embossing. At the same time, the filter rod cutting mechanism 4 signal is collected by the PLC control system and then sent to the industrial linear array camera 11 as a start or end scanning signal. The industrial linear array camera 11 receives the signal sent by the encoder of the forming machine The pulse signal output is used to collect the image of the filter rod to be tested. Each time a pulse from the encoder is received, a scan is performed. The linear array camera scans once to form a line image of 1*1280 pixels. The molding machine encoder rotates one circle to produce a filter rod. The length of a filter rod cut by the filter rod cutting mechanism 4 is 100mm. If the molding machine encoder accuracy is 1000 pulses per circle, then the entire filter rod will obtain 1000 1*1280 pixel line images. After the image is synthesized, the entire filter rod image is a 1000*1280 pixel frame image. The accuracy of the image and detection depends on the accuracy of the molding machine encoder. Calculated with a molding machine encoder of 1000 pulses per circle, the accuracy of filter rod groove offset detection can reach 0.1mm, and the formed image data is sent to the industrial computer for identification and calculation. The displacement degree of the filter rod groove is judged in combination with the signal of the filter rod cutting mechanism 4. The groove embossing module 3 receives the phase offset and performs phase compensation through the internal motion function control module. The motion control adopts a real-time motion bus to control the synchronous drive servo motor to perform synchronous paper feeding. The system synchronously collects the current position data s0 of the host at time t0 through the encoder, and obtains the main speed data v0 of the current cycle after derivation of the position signal according to time. The speed value v0 and the position value s0 are sent to the synchronous position sequence generator to perform the phase compensation process: after receiving the external phase adjustment signal or the system's internal position feedback calculation generates a following error, the offset bias loop receives the phase offset, and the system calculates the speed value v corresponding to the offset by deriving the offset according to the compensation period (this system adopts a fixed period, which is the speed derivative of a single filter rod length. The position compensation needs to be completed within a single filter rod period, and the maximum position of a single compensation is not greater than 1 / 4 of the filter rod length). 偏, superimposed on the main speed v0, and the superimposed data is sent to the synchronous position sequence generator; the driving process is executed: the data sent to the position sequence generator is subjected to a second derivative of the speed data according to the predefined electronic gear ratio to calculate the acceleration, and the position sequence data of the next cycle is calculated according to the position, speed and acceleration data, and the position sequence is transmitted to the servo actuator through the bus, and the groove embossing by the embossing roller 31 is corrected for phase shift by changing the speed of the embossing roller driving the servo motor 33, so as to achieve online correction of the groove position; the light source 13, the convex lens 15 and the light source cover 14 in the image acquisition component 1 make the light source 13 highly concentrated on the surface of the filter rod, increasing the light The line penetration allows the internal groove part to be highlighted during image acquisition, and the industrial line array camera 11 is used to scan through pulse signals to improve the detection accuracy; at the same time, the control module calculates the time required for unqualified filter rods from detection to rejection drum 21, and the time required for all lengths of unqualified filter rods from the groove embossing module 3 to the image acquisition device to be completely rejected during correction, and controls the rejection device to reject unqualified filter rods, and controls the high-pressure airflow to form positive and negative pressures for adsorption, transfer or rejection; the filter rod output port is provided with a sampling drum 22 and a sampling box 25, which is convenient for workshop staff to take samples and observe at any time; the light source 13 uses a cold light source 13 to prevent high temperature from damaging the filter rod.

[0023] The present invention has the following beneficial effects compared with the prior art:

[0024] (i) This system is developed for the first time. The image acquisition component is arranged and installed outside the filter rod entrance passage of the filter rod cutting mechanism to realize the real-time quality detection, displacement display, online correction of the groove displacement and tracking and rejection control of the unqualified filter rods whose groove displacement deviation exceeds the range for the online production of the forming machine.

[0025] (II) For the first time, an industrial linear array camera is used to perform online visual inspection of the groove displacement of the grooved filter rod. The industrial linear array camera performs online grooved filter rod line scanning by receiving pulse signals from the encoder of the forming machine. The light source penetrates the filter rod for scanning without destroying the filter rod structure. The image is then processed through system recognition and calculation to achieve image acquisition of the groove displacement of the grooved filter rod and intuitive display of the displacement of the groove segment of the online intermittent grooved filter rod. The measurement accuracy of the groove segment offset is ≤0.1mm, which is convenient for production personnel to observe intuitively and control the quality online.

[0026] (III) The present invention will realize the online detection and correction of the groove displacement quality of the intermittent groove filter rods produced by the forming machine of our factory. After correction, the displacement calculation and tracking can be performed to remove the defective filter rods with excessive displacement online. The removal accuracy is high and the removal quantity is optimal, so that the defective products are prevented from flowing into the next process section and affecting the subsequent production. It can effectively eliminate the quality risk of excessive displacement of the groove section in the production of the intermittent groove filter rods of the forming machine and maximize the saving of production materials.

[0027] (iv) The present invention timely corrects the displacement of the grooves of the intermittent groove filter rod, thereby avoiding the production of a large number of unqualified products, resulting in a large waste of materials and production time, thereby greatly improving production efficiency while saving energy and protecting the environment.

[0028] (V) During correction, it is only necessary to change the speed of the embossing roller driving servo motor after calculation through the motion function control module, thereby changing the position of the groove embossing, adjusting the distance from the groove section to the filter rod cutting mechanism, and correcting the displacement of the filter rod groove. The calculation process is simple and does not require too many components to complete the correction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a system according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of an image acquisition component according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the connection between the image acquisition component and the molding machine according to an embodiment of the present invention;

[0032] Figure 4 This is a system topology diagram of an embodiment of the present invention;

[0033] Figure 5 for Figure 1 Schematic diagram of the structure of part A;

[0034] Figure 6 This is a schematic diagram of the structure of a discontinuous groove filter rod according to an embodiment of the present invention;

[0035] Figure 7 This is a block diagram of a motion function control module according to an embodiment of the present invention;

[0036] In the figure:

[0037] 1—image acquisition component, 11—industrial linear array camera, 12—lens, 13—light source, 14—light source cover, 15—convex lens, 16—detection unit mounting bracket, 17—light source mounting bracket;

[0038] 2—concentrating drum, 21—rejecting drum, 22—sampling drum, 23—discharging drum, 24—trash box, 25—sampling box;

[0039] 3—groove embossing module, 31—embossing roller, 32—driven wheel, 33—embossing roller driving servo motor;

[0040] 4—Filter rod cutting mechanism;

[0041] 5—intermittent groove filter rod, 51—acetate fiber tow, 52—cellulose paper, 53—forming paper, 54—groove embossed section;

[0042] 6—forming paper conveying module; 7—filter rod forming module; 8—filter rod making machine; 9—forming machine. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features and objectives achieved by the present invention easy to understand, the technical solution of the invention is further explained below in combination with one of the embodiments and specific implementation methods of an online correction system for groove displacement of a filter rod forming machine and its correction method given by the present invention.

[0044] like Figure 1-6 As shown, a specific embodiment of the invention is as follows:

[0045] An online correction system for groove displacement of filter rods of a forming machine, comprising an acetate fiber tow input port, a groove embossing module 3, a forming paper conveying module 6, a filter rod forming module 7, a filter rod making machine 8, a filter rod cutting mechanism 4, a filter rod output port, a control module, an image acquisition component 1, and a rejection device;

[0046] The image acquisition component 1 is arranged and installed outside the filter rod entrance channel of the filter rod cutting mechanism 4, and includes a visual detection unit, a light source 13, a detection unit mounting bracket 16, a light source mounting bracket 17, a convex lens 15, and a light source cover 14; the detection unit mounting bracket 16 is arranged and installed on the molding machine 9, and is used to set up the image detection unit, the light source mounting bracket 17 is arranged and installed on the molding machine 9, and is a cold light source 13, and the light source cover 14 is installed on the light source 13 bracket; the light source 13 is installed inside the light source cover 14, and the light direction is upward. A hole is opened on the top of the light source cover 14 for installing the convex lens 15, and the filter rod to be tested passes through the rejection device from the upper surface of the convex lens 15; the visual detection unit includes an industrial linear array camera 11 and a lens 12; after the industrial linear array camera 11 and the lens 12 are installed in combination, they are installed downward in the direction of taking pictures, located above the filter rod to be tested, and opposite to the light direction of the light source 13.

[0047] The control module includes a molding machine encoder, a PLC control system, a molding machine electrical control PLC system, an I / O module, an industrial computer, a host system, and a groove embossing device control system; the PLC control system is respectively connected to the molding machine encoder, the molding machine electrical control PLC system, the I / O module, the light source 13, and the visual inspection unit, the molding machine electrical control PLC system is connected to the rejection device, the visual inspection unit is respectively connected to the molding machine encoder and the industrial computer, and the industrial computer is respectively connected to the I / O module, the host system, and the groove embossing device control system.

[0048] The rejection device is arranged at the filter rod output port, including a concentration drum 2, a rejection drum 21, a discharge drum 23, a garbage box 24, a sampling drum 22, and a sampling box 25; the concentration drum 2 is installed behind the filter rod cutting mechanism 4, the rejection drum 21 is installed adjacent to the concentration drum 2, the discharge drum 23 is installed adjacent to the rejection drum 21, the garbage box 24 is installed below the rejection drum 21, the sampling drum 22 is installed adjacent to the side of the rejection drum 21, and the sampling box 25 is installed below the sampling drum 22. The cut filter rod is adsorbed and transferred by controlling the high-pressure airflow to form a negative pressure.

[0049] The groove embossing module 3 is arranged at the acetate fiber bundle input port, and the groove embossing module 3 includes an embossing roller 31, a driven wheel 32, and an embossing roller driving servo motor 33. The surface of the embossing roller 31 is provided with an embossing section. The embossing roller driving servo motor 33 drives the embossing roller 31 to rotate to roll the cellulose paper passing through to form groove embossing. The embossing roller driving servo motor 33 can perform phase offset correction on the embossing roller 31 to correct the filter rod groove displacement; the groove embossing module 3 also includes a motion function control module, and the motion function control module includes an encoder, an offset bias loop, a position synchronization sequence generator, and a servo system.

[0050] The specific use includes the following steps:

[0051] The forming machine 9 is in operation, and the acetate fiber bundle enters the production line from the input port. The groove embossing module 3 and the forming paper conveying module 6 are in operation simultaneously. The groove embossing module 3 pastes the embossed cellulose paper on the inner side of the forming paper, and the filter rod forming module 7 combines the forming paper, cellulose paper and acetate fiber bundle into a filter rod, and then the filter rod hair is removed by the filter rod maker. Next, the filter rod enters the image acquisition component 1; the signal of the filter rod cutting mechanism 4 is collected by the PLC control system and then sent to the industrial linear array camera 11 as a start or end scanning signal, and the light source 13 is turned on. The industrial linear array camera 11 collects the pulse signal of the forming machine encoder and scans according to the pulse of the forming machine encoder; after obtaining the complete filter rod image, it is transmitted to the industrial computer through the 10 Gigabit Ethernet; the industrial computer recognizes and calculates the obtained image data, and judges the displacement degree of the filter rod groove in combination with the signal of the filter rod cutting mechanism 4; the industrial computer sends the correction signal to the groove embossing module 3 through calculation, and the groove embossing module 3 controls the embossing roller to drive the servo motor 33 The embossing roller 31 is subjected to phase shift correction. If the groove position moves backward, the embossing roller drives the servo motor 33 to perform forward shift correction in a synchronous phase "+" manner; if the groove position moves forward, the embossing roller drives the servo motor 33 to perform backward shift correction in a synchronous phase "-" manner, wherein the correction amount is equal to the offset amount; if the displacement degree exceeds the limit value, the industrial computer sends a signal to the I / O module, and the I / O module converts the signal and sends it to the PLC control system; the PLC control system A signal is sent to the forming machine's electronic control PLC system, and the forming machine's electronic control PLC system converts the signal and sends it to the rejection device, and the rejection device is started to reject the filter rod whose displacement exceeds the limit value. The forming machine 9 will track the displacement of the filter rod with quality defects. When the defective filter rod reaches the rejection position of the rejection drum 21, the rejection solenoid valve is energized, and the defective filter rod is rejected into the waste box by high-pressure airflow. After the rejection is completed, the solenoid valve loses power and closes, and the qualified filter rod will continue to be transmitted to the discharge drum 23 and transported out of the forming machine 9 equipment.

[0052] In the embodiment, the filter rod production speed of the forming machine is 300m / min, that is, the filter rod conveying speed v0 is 5000mm / s; the distance from the image acquisition component 1 point to the cutting point of the cutter is 0.35m, that is, the time Δl for the filter rod groove at the position of the image acquisition component 1 to be conveyed to the filter rod cutting mechanism 4 is 350mm / 5000mm / s=0.07s (70ms); the embossing section groove displacement detection time is 10mm / 5000mm / s=0.002s (2ms); the length of a single filter rod is =100mm, if it is detected that the groove embossing section is displaced by -2mm (exceeding the quality allowable range of ±0.5mm), at this time, the data signal of the groove embossing section displacement of -2mm will be transmitted to the groove embossing device control system, and after receiving the groove displacement detection phase adjustment signal, the offset bias loop receives the phase offset of -2mm, and the system calculates the speed value v corresponding to the offset by derivatizing the offset according to the compensation period. 偏 , superimposed on the main speed v0, the superimposed data is sent to the synchronous position sequence generator, the data sent to the position sequence generator is based on the predefined electronic gear ratio, the speed data is secondarily derived to calculate the acceleration, and the position sequence data of the next cycle is calculated based on the position, speed and acceleration data; the compensation distance and superimposed speed are calculated as follows: the running time of a single filter rod is the compensation amount is dt, unit s; the compensation distance is -2mm (compensation is completed within a single filter rod), and the time required for compensation is t 加 ; Compensation speed is v 加 , the resultant speed of compensation in motion is v 合

[0053]

[0054]

[0055] v 合 =v0+v 加 =5000+100=5100mm / s

[0056] The position sequence is transmitted to the servo actuator through the bus, and the embossing roller driving servo motor (33) drives the embossing roller 31 at a speed of 5100 mm / s to complete the position (forward movement) offset compensation of 2 mm for the current filter rod groove embossing section;

[0057] At the same time, in the embodiment, the distance between the image acquisition component 1 and the rejection drum 21 is 3500mm, and the distance between the groove embossing module 3 and the image acquisition component 1 is 2000mm. The electronic control PLC system of the molding machine receives the rejection signal of the unqualified filter rod detected by the detection system for groove displacement, and starts to track the displacement of the defective filter rod from the groove displacement detection point to the rejection drum 21 for a total of 3500mm (35 filter rods). The control system calculates the time required for the detected filter rod to reach the rejection drum 21 through the distance and the conveying speed. When the last filter rod in this section reaches the predetermined rejection position of the rejection drum 21, the electronic control PLC system of the molding machine controls the rejection drum 21 to start online rejection of a total of 22 filter rods with a length of 2000mm (20 filter rods) + 200mm (1+1 filter rod after correcting the offset position) between the groove embossing module 3 and the image acquisition component 1. After completing the rejection of the defective filter rods, the rejection drum is closed, and the qualified filter rods are conveyed to the downstream process link.

[0058] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. An online correction system for groove displacement of filter rods in a forming machine, characterized by: It comprises an acetate fiber bundle input port, a groove embossing module (3), a filter rod cutting mechanism (4), a filter rod output port, a control module, an image acquisition component, and a rejection device; The image acquisition component (1) is arranged and installed outside the filter rod entry passage of the filter rod cutting mechanism, and comprises a visual detection unit, a light source (13), a detection unit mounting bracket (16), and a light source mounting bracket (17); the detection unit mounting bracket (16) is arranged and installed on the molding machine (9) and is used to set up the visual detection unit, and the light source mounting bracket (17) is arranged and installed on the molding machine (9) and is used to install the light source (13); the image acquisition component (1) can perform online acquisition of the filter rod groove position; The groove embossing module (3) comprises an embossing roller (31), a driven wheel (32), an embossing roller driving servo motor (33), and a motion function control module; the embossing roller (31) is provided with an embossing section on its surface; the embossing roller driving servo motor (33) drives the embossing roller (31) to rotate and roll the cellulose paper passing therethrough to form groove embossing; the motion function control module comprises an encoder, an offset bias loop, a position synchronization sequence generator, and a servo system; The control module comprises a molding machine encoder, a PLC control system, a molding machine electronic control PLC system, an I / O module, an industrial computer, and a groove embossing device control system; the control module controls the image acquisition component to acquire a filter rod groove position image and processes the image data; if filter rod groove displacement occurs, the groove embossing device control system changes the rotation speed of the embossing roller driving servo motor (33), thereby changing the position of the groove embossing, adjusting the distance from the groove section to the filter rod cutting mechanism (4), and correcting the filter rod groove displacement; The image acquisition assembly (1) further comprises a convex lens (15) and a light source cover (14); the light source cover (14) is mounted on the light source (13) bracket, the light source (13) is mounted inside the light source cover (14), the light direction is upward, a hole is provided on the top of the light source cover (14) for mounting the convex lens (15), and the filter rod to be tested passes through the upper surface of the convex lens (15); The visual inspection unit comprises an industrial linear array camera (11) and a lens (12); the industrial linear array camera (11) and the lens (12) are assembled and installed downward in a photographing direction, located above the filter rod to be tested and opposite to the light direction of the light source (13); The rejecting device is arranged at the filter rod output port, and comprises a collecting drum (2), a rejecting drum (21), a discharge drum (23), and a trash box (24); the collecting drum (2) is installed behind the filter rod cutting mechanism (4) and is used to transport the cut filter rods; the rejecting drum (21) is installed adjacent to the collecting drum (2); the discharge drum (23) is installed adjacent to the rejecting drum (21); the trash box (24) is installed directly below the rejecting drum (21) and is used to adsorb and transfer the cut filter rods by controlling the high-pressure airflow to form a negative pressure; The rejecting device is further provided with a sampling drum (22) and a sampling box (25); the sampling drum (22) is installed adjacent to and below the side of the rejecting drum (21), and the sampling box (25) is installed directly below the sampling drum (22).

2. The online correction system for groove displacement of filter rod forming machine according to claim 1, characterized in that: The PLC control system is respectively connected to the molding machine encoder, the molding machine electrical control PLC system, the I / O module, the light source (13), and the visual inspection unit; the molding machine electrical control PLC system is connected to the rejection device; the visual inspection unit is respectively connected to the molding machine encoder and the industrial computer; the industrial computer is respectively connected to the I / O module and the groove embossing device control system.

3. The online correction system for groove displacement of filter rod forming machine according to claim 1, characterized in that: The light source (13) is a cold light source (13).

4. The correction method of the online correction system for groove displacement of filter rod forming machine according to claim 1, characterized in that: The following steps are included: S1: collecting the signal of the filter rod cutting mechanism (4) through the PLC control system and then sending it to the visual inspection unit as a start or end scanning signal; S2: sending a pulse signal through the encoder of the molding machine to allow the image acquisition component (1) to scan the filter rod to be tested according to the pulse, forming image data, and sending it to the industrial computer; S3: the industrial computer performs recognition and calculation on the obtained image data, and determines the displacement degree of the filter rod groove in combination with the signal of the filter rod cutting mechanism (4); S4: The industrial computer sends a correction signal to the groove embossing module (3) through calculation. After calculation by the motion function control module, the speed of the embossing roller driving servo motor (33) is changed, thereby changing the position of the groove embossing, adjusting the distance from the groove section to the filter rod cutting mechanism (4), and correcting the displacement of the filter rod groove.

5. The correction method of the online correction system for groove displacement of filter rod forming machine according to claim 4, characterized in that: Also includes the steps: S5, said step S5 is between S3-S4, if the displacement degree exceeds the limit value, the industrial computer sends a signal to the I / O module, the I / O module converts the signal and sends it to the PLC control system, the PLC control system sends a signal to the molding machine electronic control PLC system, the molding machine electronic control PLC system converts the signal and sends it to the rejection device, the rejection device is started to reject the filter rod whose displacement degree exceeds the limit value, if the displacement degree does not exceed the limit value, S5 is not executed.

Images