Method and device for implementing laser two-dimensional code assignment on corrugated paper packaging

Abstract

The present invention discloses a method and device for realizing laser two-dimensional code assignment on corrugated paper packaging. The first sensing device of the present invention senses the conveyed processed object, the optical path switching device is in the first position, the laser generating device outputs a first parameter laser, and after the first laser scanning output device performs a flying flat scanning on the surface of the moving processed object to form a two-dimensional code scanning area, the laser generating device is turned off; the second sensing device senses the conveyed processed object, the optical path switching device is in the second position, the laser generating device outputs a second parameter laser, and the second laser scanning output device performs a flying marking on the two-dimensional code scanning area on the surface of the moving processed object. The system has high integration, high production efficiency, and good stability.

Description

Technical Field

[0001] The invention relates to a laser marking technology, and in particular to an online multi-station laser marking technology for carrying out on-line multi-station laser marking at different stations while a conveying device moves a processed object. Background Art

[0002] At present, the surface coding of outer packaging in the food, wine and dairy industries is basically done by CO2 laser marking. This laser QR code is done at a single station, that is, the laser QR code is directly applied to the surface of the outer packaging at one station. For the outer packaging boxes made of natural color corrugated paper, if QR code is to be applied, self-adhesive QR code labels are currently used, and then the self-adhesive QR code is pasted on the surface of natural color corrugated paper. If laser coding is directly applied on the surface of natural color corrugated paper, it is difficult for mobile phones and scanners to read it because of the small color difference between the QR code and the surface of natural color corrugated paper.

[0003] In the prior art, laser scanning is first performed on the surface of the processed object to form a two-dimensional code processing area, and then the two-dimensional code is laser-marked in the two-dimensional code processing area on the surface of the processed object. CN114131206A discloses a laser marking method and a marking device thereof; on the surface of an aluminum material, a nanosecond solid laser beam is emitted to scan the area to be coded to form a white area; then a picosecond solid laser beam is emitted to the white area to scan the two-dimensional code to form a black mark. This technology uses two different laser generating devices to complete two laser processings when the processed object is stationary. This processing method is inefficient and cannot be used for processing the surface of a continuously dynamically transported processed object. At the same time, the two laser generators have a negative impact on the arrangement and heat dissipation of the laser generator.

[0004] CN114178709A discloses a method for laser marking a two-dimensional code on a pure titanium surface. First, the surface of the object to be processed is laser pre-treated to improve the roughness of the two-dimensional code area, and the pre-scan area to be marked with the two-dimensional code paves the way for the adhesion and wettability of the coating to be applied later. Then, the two-dimensional code is marked in the pre-scan area. This method also completes two laser processes when the object to be processed is in a stationary state. This processing method is inefficient and cannot be used for processing the surface of the object to be processed that is continuously and dynamically transported.

[0005] CN108857072A An online flying laser marking device and a control method thereof. A workstation set on a conveying platform completes a laser processing of a conveyed object.

[0006] None of the above prior arts record how to use one laser generator to realize different online two-dimensional code laser marking control devices and processing methods for two laser processing stations on a conveyor line, with simple structure, stable online long-term processing and high precision. This is also a difficult problem faced by technicians in this field. Summary of the invention

[0007] The object of the present invention is to provide a method and device for implementing laser two-dimensional code assignment on corrugated paper packaging at two stations on the surface of a processed object during the operation of a conveyor line by using a laser generator.

[0008] One of the technical solutions of the present invention is: a device for implementing laser two-dimensional code assignment on corrugated paper packaging, comprising:

[0009] A conveying device, used for conveying the object to be processed, with a first processing station and a second processing station arranged along the conveying direction;

[0010] The sensing device comprises a first sensing device respectively arranged at an entrance end of the first processing station and a second sensing device respectively arranged at an entrance end of the second processing station;

[0011] The first laser scanning output device is located above the first processing station and is used for flying and flat scanning the surface of the processed object to form a two-dimensional code scanning area when the processed object moves linearly with the conveying device;

[0012] The second laser scanning output device is located above the second processing station and is used to mark the QR code on the QR code scanning area on the surface of the processed object on the fly when the processed object moves linearly with the conveying device;

[0013] A laser generating device, used to output laser light to the first laser scanning output device and the second laser scanning output device respectively;

[0014] An optical path switching device, used for switching the laser output by the laser generating device to selectively input to the first laser scanning output device or the second laser scanning output device;

[0015] The control device controls the laser generating device to output information after acquiring the sensing signal of the sensing device, controls the optical path switching device to switch the laser optical path output by the laser generating device, and controls the laser output of the first laser scanning output device or the second laser scanning output device.

[0016] The first sensing device and the second sensing device can be but not limited to photoelectric sensors. The distance between the first sensing device and the second sensing device along the conveying direction of the conveying device is greater than the product of the laser scanning time t1 of the first laser scanning output device and the conveying speed v of the conveying device.

[0017] The above-mentioned conveying device may be, but is not limited to, a roller conveying device or a belt conveying device.

[0018] A further optimized technical solution is: the laser generating device outputs lasers to the first laser scanning output device and the second laser scanning output device respectively, including the first optical path and the second optical path; the optical path switching device is arranged between the first optical path and the second optical path. The optical path switching device is arranged in the first optical path and the second optical path, and through the operation switching of the optical path switching device, the laser beam output by the laser generating device is output along the first optical path or along the second optical path, and two different laser processes are realized on the surface of the processed object, specifically but not limited to scanning and processing on the surface of the natural color corrugated paper to form a two-dimensional code scanning area, and flying marking a two-dimensional code in the two-dimensional code scanning area.

[0019] The further optimized technical solution is: the second optical path includes a second-multiple beam expander arranged on the same optical axis as the laser generating device, and the second-multiple beam expander outputs to a second laser scanning output device. The second laser scanning output device is used for marking the two-dimensional code; the second optical path does not have a laser reflection device, so that the laser beam output by the laser generating device is stable and is not affected by the optical path switching device, thereby ensuring the long-term stability and invariance of the output laser for marking the two-dimensional code.

[0020] A further optimized technical solution is: the first optical path includes a first-magnification beam expander arranged on an optical axis different from that of the laser generating device, the first-magnification beam expander outputs to a first laser scanning output device, and a fixed total reflection mirror is arranged on the input side of the first-magnification beam expander; the optical path switching device includes a rotating total reflection mirror arranged on the input side of the second-magnification beam expander, and the rotating total reflection mirror is driven to rotate to reflect the laser output by the laser generating device to the fixed total reflection mirror.

[0021] The optical path switching device includes a rotating total reflection mirror arranged on the second optical path, and the rotating total reflection mirror adopts but is not limited to an automatic deflection angle total reflection mirror. The automatic deflection angle total reflection mirror has two working positions, and the first working position is a total reflection position that forms an angle with the laser beam output by the laser generating device, and reflects the laser beam output by the laser generating device to the fixed total reflection mirror. The first working position automatic deflection angle total reflection mirror is at a 45-degree angle to the output optical axis of the laser generating device. The second working position does not participate in the reflection of the laser beam output by the laser generating device.

[0022] Due to the long-term rotation of the automatic deflection angle full-reflection mirror, the angle between the mirror and the output optical axis of the laser generating device may change, causing the reflected light beam to shift. This shift affects the formation of the scanning area of ​​the QR code, and then causes errors in the scanning area of ​​the QR code. Usually this error is acceptable.

[0023] If the first optical path is coaxially arranged with the output optical axis of the laser generating device, the rotating total reflector is arranged on the first optical path. The long-term rotation of the automatic deflection angle total reflector causes the change of the output optical axis angle of the laser generating device, so that the reflected light beam is offset, and then the two-dimensional code marking light beam is offset, which affects the two-dimensional code marking and reduces the two-dimensional code marking accuracy.

[0024] A further optimized technical solution is: the control device includes:

[0025] A first laser flight control card, which receives a signal from the first sensing device, controls the movement of the optical path switching device, and controls the laser generating device to operate according to the first parameter;

[0026] The second laser flight control card receives the signal from the second sensing device and controls the laser generating device to operate according to the second parameters.

[0027] The control device also includes an industrial computer (industrial computer), which controls the first laser flight control card and the second laser flight control card to calculate or set the output parameters (power, frequency, time, etc.) of the control laser and receive the photoelectric sensor signal (photoelectric sensor 1, photoelectric sensor 2). It can connect to the outside world to receive QR code information to realize QR code assignment association, etc.

[0028] A further optimized technical solution is: an AND gate circuit is connected between the first laser flight control card, the second laser flight control card and the laser generating device, the input end of the AND gate circuit is respectively connected to the level signal of the first laser flight control card and the second laser flight control card, and the output of the AND gate circuit is connected to the laser generating device.

[0029] The AND gate circuit is used to control the laser generator to rotate and select different time periods to output lasers of different times and powers according to the control level.

[0030] The present invention uses a laser generating device (a laser) to complete the overlapping marking and coding of different graphics online. The control structure is clear and simple, and the laser optical path and the optical path switching device are reasonably set to ensure the marking accuracy of the two-dimensional code and the stability of the laser optical path during long-term operation. The equipment structure is also simple and compact, and the equipment manufacturing cost is low.

[0031] The second technical solution of the present invention is: an online laser two-dimensional code assignment method:

[0032] S1, the first sensing device senses the transported workpiece, the optical path switching device is in the first position, the laser generating device outputs the first parameter laser, and the first laser scanning output device performs flying flat scanning on the surface of the moving workpiece to form a two-dimensional code scanning area, and the laser generating device is turned off;

[0033] S2. The second sensing device senses the transported workpiece, the optical path switching device is in the second position, the laser generating device outputs a second parameter laser, and the second laser scanning output device flies to mark a QR code in the QR code scanning area on the surface of the moving workpiece.

[0034] A further optimized technical solution is: the optical path switching device is in the first position, the rotating total reflection mirror reflects the laser generating device to output the laser to the fixed total reflection mirror, and the fixed total reflection mirror reflects the output to the first laser scanning;

[0035] The optical path switching device is in the second position, the rotating total reflection mirror is rotated, and the laser output by the laser generating device is not reflected. The laser output by the laser generating device is directly output to the second laser scanning.

[0036] A further optimized technical solution is: the first laser flight control card receives a signal from the first sensing device, controls the movement of the optical path switching device, and controls the laser generating device to operate according to the first parameter;

[0037] The second laser flight control card receives the signal from the second sensing device and controls the laser generating device to operate according to the second parameters.

[0038] A further optimized technical solution is: an AND gate circuit is connected between the first laser flight control card, the second laser flight control card and the laser generating device, the input ends of the AND gate circuit are respectively connected to the level signals of the first laser flight control card and the second laser flight control card, and the output of the AND gate circuit is connected to the laser generating device; after the first laser scanning output device completes scanning, the first laser flight control card outputs a high level to the input end of the AND gate circuit; after the second laser scanning output device completes scanning, the second laser flight control card outputs a high level to the input end of the AND gate circuit.

[0039] The method of the invention has simple control logic, convenient operation, and high efficiency of using a laser generating device. The color difference between the two-dimensional code processed by the invention and the natural color corrugated paper is large, which is conducive to rapid recognition by mobile phones and scanners. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A top view of the system of the present invention.

[0041] Figure 2 A front view of the system of the present invention.

[0042] Figure 3 Schematic diagram of laser optical path and laser control of the system of the present invention DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1 , 2, the system is composed of integrated laser and control equipment, which can be moved and positioned by rollers. The system is fixed on one side of the conveying device 200 ( Figure 1 , not shown in 2). The conveying device 200 adopts a roller conveying device, and the roller of the roller conveying device rotates to transport the processed object. The processed object in this embodiment is natural color corrugated paper, which can be used as packaging. Figure 3 As shown, the conveying device 200 has two first and second stations arranged in sequence along the conveying direction relative to the laser and the control system. Under the conveying device, the natural color corrugated paper enters the first station 201 and the second station 202 successively. The conveying device at the entrance end of the first station is provided with a photoelectric sensor 1; the conveying device at the entrance end of the second station is provided with a photoelectric sensor 2. During the conveying process of the natural color corrugated paper, the photoelectric sensor 1 and the photoelectric sensor 2 will be triggered to generate a trigger signal. The distance between the photoelectric sensor 1 and the photoelectric sensor 2 along the conveying direction of the conveying device is greater than the product of the scanning time t1 of the laser of the first laser scanning output device (the working time of the laser at the first station) and the conveying speed v of the conveying device. Such a design reduces the judgment factors for the control of the laser opening work at the second station, which is conducive to simplifying (optimizing) the control logic of the laser opening work at the second station. It is conducive to improving the production efficiency on the assembly line.

[0048] like Figure 3As shown, the laser and control system equipment includes a laser 9 (laser generating device), and the laser 9 is a carbon dioxide laser. The laser beam output by the laser 9 is configured into two laser light paths.

[0049] The second optical path includes a second-multiplication beam expander 7 arranged on the same optical axis as the laser 9, and the second-multiplication beam expander 7 outputs to a galvanometer system 4 (a second laser scanning output device). The galvanometer system 4 is located above the second workstation.

[0050] The optical path switching device includes an automatic deflection total reflection mirror 8 (rotating total reflection mirror) arranged on the input side of the second multiple beam expander 7. The automatic deflection total reflection mirror 8 has two working positions. A non-reflection working position parallel to the optical axis of the laser 9 of the main optical path. A reflection working position forming an angle with the optical axis of the laser 9. When the automatic deflection total reflection mirror 8 is in the reflection position, it emits the laser beam output by the laser 9 onto the first optical path.

[0051] The first optical path includes a first-multiplication beam expander 5 arranged on a different optical axis from the laser 9, the first-multiplication beam expander 5 outputs to the cylindrical mirror assembly 3 (the first laser scanning output device), and a fixed total reflection mirror 6 is arranged on the input side of the first-multiplication beam expander 5; the fixed total reflection mirror 6 receives the laser beam reflected by the automatic deflection total reflection mirror 8 at the reflection station. The cylindrical mirror assembly 3 is located above the first station.

[0052] The beam expansion magnification of the first-magnification beam expander 5 is determined according to the size of the two-dimensional code area (white block) and the size of the laser beam spot; the beam expansion magnification of the second-magnification beam expander 7 is determined according to the fineness requirement of the two-dimensional code. The beam expansion magnification of the first-magnification beam expander 5 is greater than that of the second-magnification beam expander 7.

[0053] The rotation of the automatic deflection total reflection mirror 8 is completed by the control of the servo (or stepper) motor. The automatic deflection total reflection mirror 8 is set in the second optical path. When the second optical path is in the working state, it does not affect the laser beam output by the laser 9. The laser beam output by the laser 9 is directly input into the second multiple beam expander 7. It is prevented that the inaccurate rotation angle of the automatic deflection total reflection mirror 8 affects the laser beam.

[0054] The control device also includes an industrial computer (industrial computer) 12, which controls the first laser flight control card and the second laser flight control card to calculate or set the output parameters (power, frequency, time, etc.) of the control laser and receive the photoelectric sensor signal (photoelectric sensor 1, photoelectric sensor 2). It can connect to the outside world to receive the two-dimensional code information to realize the two-dimensional code assignment association, etc.

[0055] The cylindrical mirror laser flight control card 10 (first laser flight control card) receives the trigger signal of the photoelectric sensor 1, outputs the rotation instruction of the automatic deflection total reflection mirror 8; and controls the scanning time △t1 of the laser 9 at the first station. That is, after the automatic deflection total reflection mirror 8 rotates to the right position, the laser 9 starts to work, and the laser 9 outputs the laser beam to work on the first optical path, and the cylindrical mirror assembly 3 performs a flight flat scan on the moving natural color corrugated paper surface to form a square white block. The cylindrical mirror laser flight control card 10 outputs a low level, and controls the laser 9 through the AND gate circuit according to the processing parameters (first parameters) set by the industrial control computer, including power, frequency, pulse width scanning time △t1, and then the laser 9 is turned off. The cylindrical mirror laser flight control card 10 outputs the reset instruction of the automatic deflection total reflection mirror 8, and the automatic deflection total reflection mirror deflects to the original position. The cylindrical mirror laser flight control card 10 outputs a high level, and the processing parameter (first parameter) instruction of the industrial control computer is disabled.

[0056] The laser flight marking control card 11 (second laser flight control card) receives the trigger signal of the photoelectric sensor 2 and controls the scanning time △t2 of the laser 9 at the second station. The laser flight marking control card 11 outputs a low level and controls the laser 9 through the AND gate circuit according to the processing parameters (second parameters) set by the industrial computer, including power, frequency, pulse width scanning time △t2. At the same time, the industrial computer controls the laser flight marking control card to control the galvanometer system 4 to work and emit light, marking a two-dimensional code on the white square on the moving natural color corrugated paper surface.

[0057] The control signals of the lasers of the cylindrical mirror laser flight control card 10 and the laser flight marking control card 11 are controlled and selected to be on and off through an AND gate circuit 14. When one signal is ineffective, the level is pulled high, and the other signal can output the modulated signal without being affected. When it is completed, it is also pulled high, and then the signal on the other side passes through. In this way, "two choices" are realized, so that the laser outputs lasers of different time and power in different time periods.

[0058] In the embodiment, the rotation and reset of the automatic deflection total reflection mirror 8 are monitored. Only after the monitored rotation or reset is in place, the laser can be turned on for processing at the first station or the second station. The angle signal of the rotation of the automatic deflection total reflection mirror 8 can be obtained by, but not limited to, an angle sensor to determine whether it meets the requirements. Of course, after monitoring that the automatic deflection total reflection mirror 8 has not rotated or reset in place, the control is alarmed, and the alarm can be realized in the form of sound, light, etc.

[0059] The above structure laser and control system are integrated and arranged in Figure 1, 2, the cylindrical mirror assembly 3 and the galvanometer system 4 are used as the output of the laser, and their height and horizontal distance from the processed object (natural color corrugated paper) can be adjusted. The adjustment mechanism 40 adopts but is not limited to a worm gear, a screw nut and other mechanisms. The cylindrical mirror assembly 3 and the galvanometer system 4 are integrated on a body 100 through support arms 20 and 30 respectively. A laser and two laser light paths are set on the platform 13 in the body 100. The integration is high, and the two laser light paths are set in parallel, which is conducive to reducing the distance between the two, thereby reducing the distance between the cylindrical mirror assembly 3 and the galvanometer system 4 along the conveying direction of the conveying device; it is conducive to improving the processing rhythm, thereby improving production efficiency. A cooling device is also provided in a body 100 to achieve cooling of the laser and the control device.

[0060] The processing method of the embodiment:

[0061] Set the assembly line speed, color block width and depth, as well as the laser's natural color corrugated paper surface white square processing parameters and QR code processing parameters.

[0062] After the conveying device transmits the natural color corrugated paper to trigger the photoelectric sensor 1, the cylindrical mirror laser flight control card 10 outputs the rotation instruction of the automatic deflection total reflection mirror 8, and the automatic deflection total reflection mirror 8 rotates to the first working position to reflect the output laser beam of the laser to the fixed total reflection mirror 6. The input end of the AND gate circuit between the cylindrical mirror laser flight control card 10 and the laser 9 is at a low level.

[0063] After the automatic deflection total reflection mirror 8 rotates to the right position, the laser 9 starts the cylindrical mirror laser flight control card 10 to output PWM signal to the laser and output laser beam. The laser 9 scans the time △t1 according to the power (10-100W) and frequency (1-10kHz) set by the industrial computer; the setting of the scanning time △t1 is determined by the moving speed v of the natural color corrugated paper and the side length S of the square white block, that is, S / v. The laser beam passes through the automatic deflection total reflection mirror 8, the fixed total reflection mirror 6, the first multiple beam expander 5, and the cylindrical mirror assembly 3 to perform flight flat scanning and coding on the moving natural color corrugated paper to form a square white block;

[0064] After the laser 9 completes the flat scanning and coding, the laser 9 is turned off, and the cylindrical mirror laser flight control card 10 outputs a reset command for the automatic deflection total reflection mirror 8, and the automatic deflection total reflection mirror is deflected to the original position. The input end of the AND gate circuit between the cylindrical mirror laser flight control card 10 and the laser 9 is at a high level, and the control signal of the cylindrical mirror laser flight control card 10 to the laser 9 is prohibited.

[0065] The deflection of the automatic deflection full-reflection mirror is monitored. If it is not reset, the cylindrical mirror laser flight control card 10 outputs an alarm command and the system issues an alarm.

[0066] After the conveying device continuously transmits the natural color corrugated paper to trigger the photoelectric sensor 2, the automatic deflection full reflection mirror is in the second working position, and the laser flight marking control card 11 controls the laser 9 to start outputting the laser beam. The laser flight marking control card outputs a PWM signal to the laser 9; the laser 9 is set according to the power (10-100W) and frequency (1-10kHz) of the industrial computer. The input end of the AND gate circuit between the laser flight marking control card 11 and the laser 9 is at a low level. The laser beam passes through the second multiple beam expander 7, and the galvanometer system 4 performs flight marking to produce a QR code in the white block of the moving natural color corrugated paper square. After the galvanometer system 4 completes the marking, the laser 9 is turned off.

Claims

1. A device for implementing laser two-dimensional code assignment on corrugated paper packaging, characterized in that: include A conveying device, used for conveying the object to be processed, with a first processing station and a second processing station arranged along the conveying direction; The sensing device comprises a first sensing device respectively arranged at an entrance end of the first processing station and a second sensing device respectively arranged at an entrance end of the second processing station; The first laser scanning output device is located above the first processing station and is used for flying and flat scanning the surface of the processed object to form a two-dimensional code scanning area when the processed object moves linearly with the conveying device; The second laser scanning output device is located above the second processing station and is used to mark the QR code on the QR code scanning area on the surface of the processed object on the fly when the processed object moves linearly with the conveying device; A laser generating device, used to output laser light to the first laser scanning output device and the second laser scanning output device respectively; An optical path switching device is used to switch the laser output by the laser generating device to be selectively input to the first laser scanning output device or the second laser scanning output device; the optical path switching device is arranged between the first optical path and the second optical path; the optical path switching device includes a rotating total reflection mirror arranged on the second optical path; the rotating total reflection mirror has two working positions, the first working position is a total reflection position forming an angle with the laser beam output by the laser generating device, and the second working position does not participate in the reflection of the laser beam output by the laser generating device; The one laser generating device outputs to the first laser scanning output device through the first optical path; the one laser generating device outputs to the second laser scanning output device through the second optical path; The control device triggers the first sensing device during the conveying process of the corrugated paper, and the first sensing device generates a trigger signal; after obtaining the sensing signal of the sensing device, the optical path switching device is controlled to switch the laser optical path output by the laser generating device, the laser generating device is controlled to output information, and the first laser scanning output device or the second laser scanning output device is controlled to move and output laser.

2. The device for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 1, characterized in that: The second optical path includes a second-multiplication beam expander arranged on the same optical axis as the laser generating device, and the second-multiplication beam expander outputs to the second laser scanning output device.

3. The device for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 1, characterized in that: The first optical path includes a first-magnification beam expander arranged on an optical axis different from that of the laser generating device, the first-magnification beam expander outputs to a first laser scanning output device, and a fixed total reflection mirror is arranged on the input side of the first-magnification beam expander; the optical path switching device includes a rotating total reflection mirror arranged on the input side of the second-magnification beam expander, the rotating total reflection mirror is driven to rotate to reflect the laser output by the laser generating device to the fixed total reflection mirror.

4. The device for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 1, characterized in that: The control device includes: A first laser flight control card, which receives a signal from the first sensing device, controls the movement of the optical path switching device, and controls the laser generating device to operate according to the first parameter; The second laser flight control card receives the signal from the second sensing device and controls the laser generating device to operate according to the second parameters.

5. The device for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 4, characterized in that: An AND gate circuit is connected between the first laser flight control card, the second laser flight control card and the laser generating device. The input end of the AND gate circuit is respectively connected to the level signal of the first laser flight control card and the second laser flight control card, and the output of the AND gate circuit is connected to the laser generating device.

6. A method for implementing laser two-dimensional code assignment on corrugated paper packaging based on the device of claim 1, characterized in that: S1, the first sensing device senses the transported workpiece, the optical path switching device is in the first position, the laser generating device outputs the first parameter laser, and after the first laser scanning output device performs a flying flat scan on the surface of the moving workpiece to form a two-dimensional code scanning area, the laser generating device is turned off; S2. The second sensing device senses the transported workpiece, the optical path switching device is in the second position, the laser generating device outputs a second parameter laser, and the second laser scanning output device flies to mark a QR code in the QR code scanning area on the surface of the moving workpiece.

7. The method for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 6, characterized in that: The optical path switching device is in the first position, and the total reflection mirror is rotated to reflect the laser generating device to output the laser to the fixed total reflection mirror, and the fixed total reflection mirror reflects the output to the first laser scanning; The optical path switching device is in the second position, the rotating total reflection mirror is rotated, and the laser output by the laser generating device is not reflected. The laser output by the laser generating device is directly output to the second laser scanning.

8. The method for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 6, characterized in that: The first laser flight control card receives a signal from the first sensing device, controls the movement of the optical path switching device, and controls the laser generating device to operate according to the first parameter; The second laser flight control card receives the signal from the second sensing device and controls the laser generating device to operate according to the second parameters.

9. The method for implementing laser two-dimensional code assignment on corrugated paper packaging as claimed in claim 8, characterized in that: An AND gate circuit is connected between the first laser flight control card, the second laser flight control card and the laser generating device, the input ends of the AND gate circuit are respectively connected to the level signals of the first laser flight control card and the second laser flight control card, and the output of the AND gate circuit is connected to the laser generating device; after the first laser scanning output device completes scanning, the first laser flight control card outputs a high level to the input end of the AND gate circuit; after the second laser scanning output device completes scanning, the second laser flight control card outputs a high level to the input end of the AND gate circuit.

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