System and method for detecting holes in liquid food packaging material

Abstract

The invention discloses a system and a method for detecting holes in a liquid food packaging material. The system comprises a hole sensing device, a hole judging device and a hole repairing device, wherein the hole sensing device and the hole repairing device are arranged on a production line of the liquid food packaging material; the hole sensing device is used for acquiring state data of holes in the liquid food packaging material conveyed on the production line; the hole judging device is used for receiving the state data of the holes transmitted by the hole sensing device and judging whether the holes meet design requirements or not according to the state data of the holes; and the hole repairing device is used for receiving a repairing instruction sent by the hole judging device when the hole judging device judges that the holes do not meet the design requirements, and repairing the holes which do not meet the design requirements. According to the technical scheme, the high-speed processor and the acquisition module are adopted, small holes in the packaging material are detected, whether the holes in the packaging material have defects or not is determined by judging the states of the holes, and the holes with the defects are repaired.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging material detection, and in particular relates to a detection system and method for holes in liquid food packaging materials. Background Art

[0002] Liquid food packaging bags are formed by stacking, winding and printing packaging paper materials. The die-cutting machine is a component of the printing machine. It cuts the packaging coil or cardboard into a certain shape and is an important equipment for packaging processing and molding after printing.

[0003] Disposable packages have been used in the packaging industry for packaging and transporting liquid foods. Such disposable packages are often made of flexible material which is converted into a sealed packaging container filled with liquid in a desired shape by folding, forming and sealing. A large group of such disposable packages are produced from laminated packaging materials comprising a core layer made of paper or paperboard and a liquid-tight plastic coating on the outside of both sides of the core layer. The packaging laminate may also include additional plastic layers and / or metal layers to give the packaging container excellent shielding properties against, for example, gases and light.

[0004] After the packaging material is formed into a packaging container containing a beverage, in addition to cutting the package with scissors, the more common way to drink is to insert a straw or unscrew / open the lid, which requires pre-punching holes in the paper base of the packaging material to facilitate opening when drinking. The opening device usually present in the packaging container includes a hole punched out in the packaging core layer. The pre-punched hole is covered by other layers of the packaging on the inner and outer sides of the packaging core layer. The other layers are sealed to each other in the opening contour area of ​​the pre-punched hole, thereby forming a layer film without cardboard. For smaller volume containers, the pre-punched hole is a straw hole with a smaller hole diameter, which is generally called a pre-punched hole (PPH). For larger volume containers, the pre-punched hole has a larger hole diameter, which is generally called a pre-laminated hole (PLH).

[0005] In the production of packaging boxes with suction holes, the above-mentioned suction holes will be formed on the liquid food packaging materials after the punching and die-cutting processes. Whether the suction holes are qualified is an important factor affecting the quality of the packaging boxes. Therefore, it is a technical problem that urgently needs to be solved to achieve synchronous detection and processing of suction hole defects in different parts of different paper webs of liquid food packaging materials during high-speed printing and die-cutting. Summary of the invention

[0006] In view of the above problems, the present invention discloses a system and method for detecting holes in liquid food packaging materials, so as to overcome the above problems or at least partially solve the above problems.

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

[0008] On one hand, the present invention provides a hole detection system on liquid food packaging materials, comprising a hole sensing device, a hole judging device and a hole repairing device, wherein the hole sensing device and the hole repairing device are arranged on a production line of liquid food packaging materials, and the hole sensing device, the hole repairing device and the hole judging device are connected; wherein,

[0009] A hole sensing device is used to obtain status data of holes on liquid food packaging materials being transported on a production line;

[0010] A hole judging device is used to receive the hole status data transmitted by the hole sensing device, and judge whether the hole meets the design requirements according to the hole status data, and issue a repair instruction when the hole does not meet the design requirements;

[0011] The hole repairing device is used to receive the repairing instruction issued by the hole judging device and repair the hole that does not meet the design requirements.

[0012] Optionally, a display device is also included, which is connected to the hole judgment device and is used to display the status data of the detected holes and is also used to set parameters for the hole judgment device.

[0013] Optionally, at least one group of hole sensing devices and / or hole repairing devices are respectively provided, the number of hole sensing devices and hole repairing devices in each group is the same, and the setting interval of the hole sensing devices and the hole repairing devices is the same as the interval between the holes on two consecutive liquid food packaging materials.

[0014] Optionally, the hole sensing device is an image capturing device or a photoelectric sensing device, and the photoelectric sensing device includes a through-beam optical fiber sensor or a color mark detection sensor; the hole judging device is a DSP controller, an FPGA controller or a PLC controller.

[0015] Optionally, when the hole judging device is a PLC controller, the hole detection system on the liquid food packaging material further includes an HSC input and output module, and the hole sensing device and the hole repairing device are connected to the PLC controller via the HSC input and output module.

[0016] Optionally, a touch screen is also included, which is used to display statistical information about the status of the holes in the PLC controller and / or to set parameters of the PLC controller.

[0017] Optionally, the hole status data includes at least one of whether there is a difference between the multiple holes on the liquid food packaging material, the opening size of each hole, or the detected color change of the hole.

[0018] Optionally, the hole repairing device is an air blowing device, an air suction device or a mechanical insertion repairing device.

[0019] Optionally, the blowing device is a high-speed cylinder, the high-speed cylinder is provided with a blowing pipe, and the blowing pipe is provided with a blowing valve.

[0020] Optionally, an alarm module is included, which is connected to the hole judgment device. The alarm module is used to send out an alarm signal when the number of holes that do not meet the design requirements reaches a preset number within a preset time period.

[0021] Another aspect of the present invention provides a method for detecting holes in liquid food packaging materials, the method comprising the following steps:

[0022] Obtain status data of holes on liquid food packaging materials;

[0023] Determine whether the hole meets the design requirements based on the hole status data, and issue a repair instruction when the hole does not meet the design requirements;

[0024] Repair holes that do not meet design requirements according to the repair instructions.

[0025] Optionally, obtaining the status data of the hole on the liquid food packaging material includes:

[0026] At the same time, the holes on multiple liquid food packaging materials on the production line are detected to obtain the status data of each hole;

[0027] Determine whether the hole meets the design requirements based on the hole status data. When the hole does not meet the design requirements, the repair instructions include:

[0028] A repair instruction is sent to the corresponding hole that does not meet the design requirements, so as to repair the hole that does not meet the design requirements.

[0029] Optionally, the method further includes:

[0030] At least a first group of photoelectric sensing devices and a second group of photoelectric sensing devices are provided, the second group of photoelectric sensing devices are used to detect the holes again, and the detection results of the first group of photoelectric sensing devices are verified according to the triggering conditions of the second group of photoelectric sensing devices.

[0031] The advantages and beneficial effects of the present invention are:

[0032] The above technical solution adopts a high-speed processor and an acquisition module to detect tiny holes on the packaging material, and determines whether there are defects in the holes on the packaging material by judging the state of the holes, and repairs the defective holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0034] Figure 1 It is a schematic diagram of the composition structure of a detection system for holes in liquid food packaging materials in one embodiment of the present invention;

[0035] Figure 2 It is a schematic diagram of the specific composition of a detection system for holes in liquid food packaging materials in one embodiment of the present invention;

[0036] Figure 3 It is a schematic flow chart of a method for detecting holes on a liquid food packaging material in one embodiment of the present invention;

[0037] Figure 4 It is a flowchart of executing an algorithm in a hole judgment device in one embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0042] See also Figure 1 As shown, an embodiment of the present invention discloses a system for detecting holes in liquid food packaging materials. The system for detecting holes in liquid food packaging materials includes a hole sensing device 100, a hole judging device 200 and a hole repairing device 300. The hole sensing device 100 and the hole repairing device 300 are arranged on a production line of liquid food packaging materials. The hole judging device 200 can be arranged on or outside the production line to realize functions such as control, judgment and calculation by remote control.

[0043] Specifically, the hole sensing device 100 includes a photoelectric sensor or an image sensor for identifying or detecting holes on the liquid food packaging material.

[0044] For example, when the hole sensing device 100 is a photoelectric sensor, when the hole on the liquid food packaging material on the production line passes in front of the hole sensing device, this type of photoelectric sensor will be triggered, and the trigger signal will be sent to or pulled into the hole judgment device. If it is not triggered or the trigger signal strength is weak, it means that there is a defect in the hole. The hole sensing device 100 can also be another photoelectric sensor, which detects defect characteristics through the color difference caused by the different reflectivity and absorption rate of the object to light. Since the existence of holes in the food packaging material or the size of the holes will affect its color, the state of the holes can be identified by analyzing the corresponding data. Of course, the hole sensing device can also be an image sensor, which mainly obtains pixel data of the food packaging material.

[0045] The hole judgment device 200 is preferably a control processor suitable for high-speed processing, including a high-performance DSP chip, a high-performance single-chip microcomputer, an FPGA field programmable gate array architecture, and a PLC controller, etc., which is used to judge whether the hole exists or meets the design requirements by analyzing the state data of the hole of the hole sensing device, and then decide whether to repair the hole according to the judgment result. If the hole does not meet the design requirements, a repair instruction is sent to the corresponding hole repair device 300, and the repair instruction can be an action execution instruction. Among them, the state data of the hole includes the size of the hole opening.

[0046] The hole repair device 300 includes a device that implements a blowing method or mechanical punching and hole round edge trimming method, and is used to receive the repair instruction issued by the hole judgment device 200, and repair the holes that do not meet the design requirements so that the repaired holes meet the design requirements.

[0047] In summary, the detection system disclosed in this embodiment can be used for the detection and processing of holes on liquid food packaging materials in a high-speed moving process on a continuous production line, and can also be used for the detection and processing of similar small feature parts in fast movement; and for packaging materials of different models and sizes, it is only necessary to adjust the positions of the hole sensing device and the hole repair device to achieve reuse, which not only ensures the manufacturing quality of the packaging material, but also saves the time and cost of changing different models of products.

[0048] In one or some embodiments, the hole detection system on the liquid food packaging material further includes a display device 400, which is preferably a touch screen or other liquid crystal screen capable of operating input, and the display device 400 is connected to the hole judgment device 200, and is used to display statistics and status information of the holes in the hole judgment device, etc. In addition, the display device can also be used to set parameters in the hole judgment device.

[0049] In a preferred embodiment, in order to improve the accuracy of detection and repair, at least one group of hole sensing devices 100 and / or hole repairing devices 300 are respectively provided, and the number of hole sensing devices 100 and hole repairing devices 300 in each group is the same, and the setting interval of the hole sensing devices and the hole repairing devices is the same as the interval between two consecutive holes on the liquid food packaging material, and the above-mentioned multiple groups of detections are mutually verified to prevent the defective holes from entering the next process. Preferably, two groups of hole sensing devices 100 are provided, and only when the data of the two groups of hole sensing devices are not abnormal, can it be determined that there is no problem with the hole.

[0050] In one embodiment, the hole sensing device 100 is an image capture device or a photoelectric sensing device; the image capture device includes a camera or a camera head, which can obtain an image of the liquid food packaging material. Preferably, the image capture device also performs preliminary preprocessing on the image of the liquid food packaging material to identify the hole. In order to improve the reaction speed, the hole sensing device is preferably a photoelectric sensing device, including a beam-type optical fiber sensor or a color mark detection sensor, which can identify whether there is a hole on the liquid food packaging material by the amount of rays or the change of color, and when there is a hole, whether the opening size of the hole, that is, the size of the hole, meets the design requirements.

[0051] The light-emitting part and the light-receiving part of the through-beam fiber optic sensor are installed in a straight line. If an object blocks the light, a signal change occurs. The through-beam fiber optic sensor can be used over a wide detection distance (it is also widely used at short distances).

[0052] Color mark sensors can be used to detect various holes or labels, etc. Color mark sensors are often used to detect specific color marks or spots on objects. Color mark detection is achieved by comparing with non-color mark areas, and can detect small differences in grayscale values. The light source of the color mark sensor is installed perpendicular to the target object, and the receiver is installed at an acute angle to the object, so that it only detects scattered light from the target object, thereby avoiding the sensor directly receiving reflected light and making the light beam focus very narrow. Both incandescent lamps and monochromatic light sources can be used for color mark detection.

[0053] The hole judgment device 200 is a DSP controller, an FPGA controller or a PLC controller. The controller selection standard is to be able to quickly process and respond to large quantities of hole data, avoid delays, and meet the needs of timely judgment and repair processing on high-speed production lines.

[0054] In one or more embodiments, see Figure 2 As shown, when the hole judgment device is a PLC controller, the detection system of holes on liquid food packaging materials also includes an HSC input and output module, which is preferably a 1769HSC high-speed counter, and the PLC controller is preferably an AB (Allen-Bradley) PLC controller, and the model is preferably L1769. The HSC input and output module can also play a role in signal transmission. The hole sensing device and the hole repair device can be connected to the PLC controller through the HSC input and output module to realize the transmission of hole data and the transmission of command signals.

[0055] At this time, the hole detection system on the liquid food packaging material also includes a touch screen, which is preferably an AB (Allen-Bradley) touch screen. In the solution where the hole judgment device is a PLC controller, the touch screen is not only used to display the statistical information of the holes in the PLC controller, but can also be used to set the parameters of the PLC controller.

[0056] In one or some embodiments, the hole judgment device processes and judges the status data of the hole through a preset algorithm. For example, when the hole sensing device is an image capture device, machine learning and deep learning methods can be used to pre-calculate the hole data and establish a hole recognition model to judge the status of the hole, such as the opening.

[0057] When using a photoelectric sensing device for detection, multiple sensors can be used to simultaneously detect the status of holes on multiple packaging materials. By judging whether there is a difference in the status data of the multiple holes detected on the liquid food packaging material, the holes that need to be repaired can be determined. In addition, the status data of the holes obtained by a single sensor can be used to make judgments, such as the degree of opening and closing of the holes, that is, whether there is any obstruction, or by judging whether the holes meet the design requirements through changes and differences in color between the holes and other areas.

[0058] Specifically, when judging the data of a single hole, it can be done by setting a threshold. For example, if the preset threshold is exceeded, it can be concluded that the hole is qualified and meets the design requirements.

[0059] In one or some embodiments, the hole repair device is a blowing device or a mechanical insertion repair device, wherein the blowing device is preferably a high-speed cylinder, which can realize a fast blowing function by using a cylinder that can move quickly. Furthermore, a blowing pipe is provided on the high-speed cylinder, and one or more blowing valves are provided on the blowing pipe, so that multiple holes can be processed at the same time, and of course, only the holes with defects can be blown separately.

[0060] In one or some embodiments, the hole detection system on the liquid food packaging material includes an alarm module, which is connected to the hole judgment device. The alarm module is used to send out an alarm signal when an unqualified hole appears. The alarm signal includes an acoustic and optical signal. For example, the alarm module is used to send out an alarm signal when the number of holes that do not meet the design requirements reaches a preset number within a preset time period. At this time, it indicates that the die-cutting, punching and other equipment may have a fault, and reminds the staff to carry out maintenance.

[0061] See also Figure 3 As shown, another aspect of the present invention provides a method for detecting holes in liquid food packaging materials, the method comprising the following steps:

[0062] Step 110, obtaining status data of the holes on the liquid food packaging material.

[0063] Preferably, a photoelectric sensor arranged on a production line of liquid food packaging materials is used to detect the state of the holes on the liquid food packaging materials. The photoelectric sensor is preferably a through-beam optical fiber sensor. This step mainly uses the photoelectric sensor to scan the liquid food packaging materials on the production line, thereby collecting the position and state data of the holes, which is convenient for subsequent judgment of the state of the holes.

[0064] Step 120, judging whether the hole meets the design requirements according to the hole status data, and issuing a repair instruction when the hole does not meet the design requirements.

[0065] Specifically, the hole status data can be transmitted to the hole judgment device, and the hole judgment device judges whether the hole meets the design requirements according to the preset algorithm. The preferred hole judgment device is a DSP, FPGA controller or PLC controller, which performs logical operations on the obtained hole status data through the preset algorithm to obtain the judgment results of which holes have defects. When the requirements are not met, an action execution type repair instruction can be sent to the corresponding repair device of the hole.

[0066] Step 130, repairing the hole that does not meet the design requirements according to the repair instruction. When the hole does not meet the design requirements, the hole repairing device repairs the hole that does not meet the design requirements according to the received repair instruction, which is preferably to perform a certain action.

[0067] According to the method for detecting holes on liquid food packaging materials disclosed in this embodiment, if there are pieces of paper or burrs that have not been removed cleanly around the holes on the packaging material, the above-mentioned method is followed by blowing, mechanical insertion punching, and shearing to remove the above-mentioned pieces of paper or burrs.

[0068] In one embodiment, step 110 of acquiring the status data of the holes on the liquid food packaging material by sensing includes: simultaneously performing sensing detection on the holes on a plurality of consecutive liquid food packaging materials on the production line to acquire the status data of each hole.

[0069] Then step 120 determines whether the hole meets the design requirements according to the hole status data. When the hole does not meet the design requirements, issuing a repair instruction includes: sending a repair instruction to the corresponding hole that does not meet the design requirements, thereby repairing the hole that does not meet the design requirements.

[0070] Preferably, the abnormality in the state data of the hole is caused by the photoelectric sensing device not being triggered, and the method for detecting holes on liquid food packaging materials further includes:

[0071] At least a first group of photoelectric sensing devices and a second group of photoelectric sensing devices are provided, the second group of photoelectric sensing devices are used to detect the holes again, and the detection results of the first group of photoelectric sensing devices are verified according to the triggering conditions of the second group of photoelectric sensing devices.

[0072] Preferred Embodiments

[0073] The method for detecting holes in liquid food packaging materials disclosed in this preferred embodiment is implemented by using the above-mentioned system for detecting holes in liquid food packaging materials, and specifically comprises the following steps:

[0074] First, when the holes on the continuous plurality of liquid food packaging materials on the production line pass through the position of the hole sensing device, i.e., the photoelectric sensing device, the photoelectric sensing device obtains the state data of the hole and transmits it to the hole judging device 200. The hole judging device 200 judges the received state data of the hole and determines which holes do not meet the design requirements. For example, when the state data of the hole is trigger data, it is necessary to determine which photoelectric sensing device signals are triggered. If triggered, it means that the hole exists and the opening is appropriate. If the signal of the photoelectric sensing device is not triggered, or the signal is weak, it means that the hole does not exist, or the opening of the hole does not meet the requirements, and the hole is blocked.

[0075] Secondly, a repair instruction is issued to the hole repair device corresponding to the hole that does not meet the design requirements, and the hole repair device is started to repair the hole.

[0076] The photoelectric sensing device and the hole repair device can be set at the same position. Since the above method has the characteristics of fast processing speed, the collection, judgment and spray repair processing can be completed within milliseconds.

[0077] There may also be a certain interval between the positions of the photoelectric sensing device and the hole repairing device, and the interval distance and the blowing time are set according to a preset algorithm.

[0078] Preferably, combined Figure 4 As shown, in order to obtain accurate hole status data, the hole status data can be collected at least twice in a short period of time, and the hole status can be accurately determined through logical judgment. When the hole status data obtained by more than two tests do not meet the requirements, it is determined that the hole needs to be repaired.

[0079] Still taking the example that the hole status data is the trigger signal data, firstly, the hole judgment device is used to judge the signals of multiple photoelectric sensing devices during hole detection. In the case of triggering, it is determined which photoelectric sensing devices' signals are triggered and which photoelectric sensing devices' signals are not triggered.

[0080] Through a preset timing program, after a preset time of several milliseconds to tens of milliseconds, the detection signals of each photoelectric sensing device are collected again to confirm which photoelectric sensing device signals are triggered and which photoelectric sensing device signals are not triggered.

[0081] If it is triggered twice, the state of the hole is considered to meet the design requirements, otherwise it does not meet the design requirements.

[0082] Then, the hole judgment device issues a repair instruction to the hole repair device corresponding to the hole that does not meet the design requirements, so that the hole repair device repairs the hole, and the hole repair device is preferably a high-speed cylinder.

[0083] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A detection system for holes in liquid food packaging materials, characterized in that: It includes a hole sensing device, a hole judging device and a hole repairing device, wherein the hole sensing device and the hole repairing device are arranged on a production line of liquid food packaging materials, and the hole sensing device, the hole repairing device and the hole judging device are connected; wherein, The hole sensing device is used to obtain status data of the holes on the liquid food packaging material being transported on the production line; The hole judging device is used to receive the hole status data transmitted by the hole sensing device, and judge whether the hole meets the design requirements according to the hole status data, and issue a repair instruction when the hole does not meet the design requirements; The hole repairing device is used to receive the repairing instruction issued by the hole judging device and repair the hole that does not meet the design requirements.

2. The detection system for holes in liquid food packaging materials according to claim 1, characterized in that: It also includes a display device, which is connected to the hole judgment device and is used to display the status data of the detected holes and is also used to set parameters for the hole judgment device.

3. The detection system for holes in liquid food packaging materials according to claim 1, characterized in that: The hole sensing device and / or the hole repairing device are respectively arranged in at least one group, the number of the hole sensing devices and the hole repairing devices in each group is the same, and the arrangement interval of the hole sensing device and the hole repairing device is the same as the interval between two consecutive holes on the liquid food packaging material.

4. The detection system for holes in liquid food packaging materials according to claim 1, characterized in that: The hole sensing device is an image capturing device or a photoelectric sensing device, and the photoelectric sensing device includes a beam-type optical fiber sensor or a color mark detection sensor; the hole judging device is a DSP controller, an FPGA controller or a PLC controller.

5. The detection system for holes in liquid food packaging materials according to claim 4, characterized in that: When the hole judging device is a PLC controller, the hole detection system on the liquid food packaging material further includes an HSC input-output module, and the hole sensing device and the hole repairing device are connected to the PLC controller via the HSC input-output module.

6. The detection system for holes in liquid food packaging materials according to claim 5, characterized in that: It also includes a touch screen, which is used to display statistical information about the status of the holes in the PLC controller and / or to set parameters of the PLC controller.

7. The system for detecting holes in liquid food packaging materials according to any one of claims 1 to 6, characterized in that: The state data of the holes include at least one of whether there is a difference between the multiple holes on the liquid food packaging material, the opening size of each hole, or the color change of the detected holes.

8. The system for detecting holes in liquid food packaging materials according to any one of claims 1 to 6, characterized in that: The hole repairing device is an air blowing device, an air suction device or a mechanical insertion repairing device.

9. The detection system for holes in liquid food packaging materials according to claim 8, characterized in that: The blowing device is a high-speed cylinder, a blowing pipe is arranged on the high-speed cylinder, and a blowing valve is arranged on the blowing pipe.

10. The system for detecting holes in liquid food packaging materials according to any one of claims 1 to 6, characterized in that: It comprises an alarm module, which is connected to the hole judgment device and is used to send out an alarm signal when the number of holes that do not meet the design requirements reaches a preset number within a preset time period.

11. A method for detecting holes in liquid food packaging materials, characterized in that: The method comprises the following steps: Acquiring state data of the holes on the liquid food packaging material; Determining whether the hole meets the design requirements according to the state data of the hole, and issuing a repair instruction when the hole does not meet the design requirements; According to the repair instruction, the holes that do not meet the design requirements are repaired.

12. The method for detecting holes in liquid food packaging materials according to claim 11, characterized in that: Acquiring the state data of the holes on the liquid food packaging material includes: Simultaneously, detecting a plurality of holes on the liquid food packaging materials on the production line to obtain status data of each hole; Judging whether the hole meets the design requirements according to the state data of the hole, and issuing a repair instruction when the hole does not meet the design requirements includes: A repair instruction is sent to the corresponding hole that does not meet the design requirements, so as to repair the hole that does not meet the design requirements.

13. The method for detecting holes in liquid food packaging materials according to claim 12, characterized in that: The method further comprises: At least a first group of photoelectric sensing devices and a second group of photoelectric sensing devices are provided, the second group of photoelectric sensing devices are used to detect the hole again, and the detection result of the first group of photoelectric sensing devices is verified according to the triggering condition of the second group of photoelectric sensing devices.

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