End-of-line automated quality inspection system for corrugated paper production

Abstract

The present invention discloses a terminal automated quality inspection system for corrugated paper production, relates to the technical field of product quality inspection, and effectively improves the accuracy of quality inspection results. The present invention generates a finished corrugated paper image model according to a corrugated paper production instruction, sets a quality inspection cycle, and then establishes a real-time corrugated paper model under each production step according to various real-time data of the corrugated paper production process, compares the finished corrugated paper image model with the real-time corrugated paper model, and then determines whether there is an abnormality in the corresponding production step, generates a corresponding pressure adjustment decision or a cutting angle adjustment decision according to the abnormality judgment result, and adjusts the status of each hardware facility according to the pressure adjustment decision or the cutting angle adjustment decision.

Description

Technical Field

[0001] The invention relates to the technical field of product quality detection, in particular to a terminal automated quality detection system for corrugated paper production. Background Art

[0002] With the growing demand for corrugated paper in the global packaging industry, the production process and quality control of corrugated paper have become key links in the industry chain. As a material widely used in packaging, transportation and display, the quality of corrugated paper directly affects the protective performance and aesthetics of the final product. However, in the traditional corrugated paper production process, quality inspection mainly relies on manual inspection, which is not only inefficient but also easily affected by human factors, making it difficult to ensure the accuracy and consistency of the inspection results.

[0003] Existing detection accuracy is insufficient: Many existing systems rely on simple visual recognition technology and cannot accurately identify and distinguish subtle quality issues, such as uneven thickness of cardboard, surface defects, etc. Corrugated paper quality detection technology has the following defects;

[0004] Low detection efficiency: When processing corrugated cardboard on high-speed production lines, existing automated inspection systems are often unable to conduct comprehensive inspections in real time and effectively, resulting in some defective products flowing into the next process.

[0005] Therefore, how to improve the accuracy of quality inspection results while realizing full-process production quality inspection of corrugated paper is a difficulty of the existing technology. For this purpose, a terminal automated quality inspection system for corrugated paper production is provided. Summary of the invention

[0006] In order to solve the above technical problems, the object of the present invention is to provide a terminal automated quality inspection system for corrugated paper production.

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

[0008] A terminal automated quality inspection system for corrugated paper production includes a cloud computing platform, wherein the cloud computing platform is communicatively connected to a production hardware terminal and a data inspection terminal;

[0009] The production hardware end is equipped with a raw material mixing device, a corrugated roller forming machine, a bonding machine, and a cutting device, and the status of each hardware facility is adjusted according to the pressure adjustment decision or cutting angle adjustment decision from the data detection end;

[0010] The data detection end is provided with a production data acquisition module, a quality assessment module and a defect inspection module;

[0011] The production data acquisition module installs a variety of sensors on each hardware facility in the production hardware end, and collects various real-time data of the corrugated paper production process of each hardware facility through various sensors;

[0012] The quality assessment module is used to obtain corrugated paper production instructions, generate a corrugated paper finished product image model according to the corrugated paper production instructions, set a quality inspection cycle, establish a real-time corrugated paper model under each production step according to various real-time data of the corrugated paper production process, and compare the corrugated paper finished product image model with the real-time corrugated paper model to determine whether there is an abnormality in the corresponding production step;

[0013] The defect inspection module is used to generate a pressure adjustment decision or a cutting angle adjustment decision according to the abnormality judgment result, and send the pressure adjustment decision or the cutting angle adjustment decision to the production hardware end.

[0014] Furthermore, the production hardware end is communicatively connected to a raw material mixing device and a corrugated roller forming machine, a bonding machine, a cutting device and a paint spraying device. The above-mentioned hardware facilities are connected in sequence through a conveyor belt. The corrugated roller forming machine is composed of two corrugated rollers, a flattening machine, a pressure sensor, a laser sensor and a camera. The bonding machine is composed of a glue coating roller, a camera and a pressure sensor. The cutting device is composed of multiple cutting blades, a camera and a laser sensor.

[0015] Furthermore, the process of obtaining the corrugated paper production instruction includes:

[0016] The staff uploads the corrugated paper production instructions to the data detection terminal, wherein the corrugated paper production instructions include the corrugated paper production quantity, the product finished product image and the production steps, wherein the production steps include compression, bonding, shaping and cutting;

[0017] The data detection end sends the corrugated paper production instructions to the production data collection module, the quality assessment module and the defect inspection module at the same time. At the same time, the data detection end allocates several groups of corrugated roller forming machines, bonding machines and cutting devices according to the production steps and the production quantity of corrugated paper;

[0018] The raw material allocation device in the production hardware end transmits the corresponding amount of production raw materials to the allocated corrugated roller forming machine through a conveyor belt according to the corrugated paper production quantity in the corrugated paper production instruction;

[0019] At the same time, the quality assessment module extracts the finished product image from the corrugated paper production instructions, and then generates a corrugated paper finished product image model based on the finished product image, extracts the corrugated structure model from the corrugated paper finished product image model, and sends the corrugated structure model to the production hardware end.

[0020] Furthermore, the process of collecting various real-time data of hardware facilities during the compression, bonding and finalization process includes:

[0021] When the conveyor belt conveys the raw materials through the hardware facilities in sequence, the laser sensor located on the corrugated roller forming machine first sets a number of laser projection points arranged in a horizontal straight line at the position of the conveyor belt corresponding to the first corrugated roller, and sets a number for each laser projection point;

[0022] When the corrugated paper parts pass through the laser projection points along the conveyor belt, the laser sensor emits laser signals to each laser projection point in the vertical direction, and then generates the corresponding laser reflection signal spectrum of each laser projection point in real time. At the same time, the camera and pressure sensor on the corrugated roller forming machine collect the real-time corrugated paper status video and the pressure change curve of the corrugated roller in the compression position in real time.

[0023] By adopting the process of acquiring various real-time data of the corrugated roller forming machine, the production data acquisition module sequentially acquires various real-time data during the bonding step of the bonding machine and the shaping step of the corrugated roller forming machine.

[0024] Furthermore, the process of comparing the finished corrugated paper image model with the real-time corrugated paper model includes:

[0025] The real-time corrugated paper status video is split into several video clips according to the time length of the quality inspection cycle, and a real-time corrugated paper model is established based on the video clips;

[0026] Establish a two-dimensional coordinate system, map the laser reflection signal spectrum corresponding to each laser projection point onto the same two-dimensional coordinate system, and set a number of time points on the two-dimensional coordinate system;

[0027] Divide each laser reflection signal spectrum into a number of laser reflection signal segments according to the time point distribution, perform normal distribution on the laser reflection signal segments between the same pair of time points, and then select the laser reflection signal segment at the center of the normal distribution result as the normal laser reflection signal segment between the corresponding time points;

[0028] Setting a deviation threshold, comparing the normal laser reflection signal segments between each pair of time points with other laser reflection signal segments in turn, and obtaining the area value between each laser reflection signal segment and the normal laser reflection signal segment according to the comparison result;

[0029] If the area value is less than or equal to the deviation threshold, it is judged that the production at the location of the corresponding laser projection point is normal under the corresponding quality inspection cycle. Otherwise, it is judged that there is a production abnormality at the corresponding location, and the abnormality is marked at the corresponding location of the real-time corrugated paper model.

[0030] Furthermore, the pressure adjustment decision generation process includes:

[0031] When there are abnormal markings on the real-time corrugated paper model in any quality inspection cycle, the defect inspection module will overlap and map the real-time corrugated paper model with the image model of the finished corrugated paper, and then determine the position with abnormal markings in the real-time corrugated paper model relative to the deviation of the corresponding position in the image model of the finished corrugated paper, and at the same time map the pressure change curve in the corresponding quality inspection cycle on the real-time corrugated paper model;

[0032] A pressure adjustment decision is generated based on the judgment result and sent to the production hardware end. When the production hardware end receives the pressure adjustment decision, the pressure of the second corrugated roller of the corrugated roller forming machine, the flattening machine or the gluing roller of the bonding machine is adjusted according to the pressure adjustment decision.

[0033] Furthermore, the production hardware side controls the corrugated roller forming machine and the bonding machine to sequentially perform the production steps corresponding to compression, bonding and shaping according to the pressure adjustment decision, thereby obtaining the finished corrugated paper;

[0034] The conveyor belt transmission speed is set. At the same time, the quality assessment module obtains the target length of the corrugated paper according to the finished corrugated paper image model, and then sets the cutting interval time according to the conveyor belt transmission speed and the target length of the corrugated paper.

[0035] Furthermore, the generation process of the cutting angle adjustment decision includes:

[0036] The cutting device cuts the finished corrugated paper according to the cutting angle and the cutting interval. At the same time, the laser sensor on the cutting device collects the laser reflection signal spectrum at the edge of the cut corrugated paper, and the camera collects the real-time corrugated paper status video of the cut corrugated paper.

[0037] When the cutting result at the edge of the corrugated paper meets the cutting standard, the laser reflection signal spectrum at the corresponding position has a longer duration than the laser reflection signal spectrum that does not meet the cutting standard;

[0038] The vertical angle of the cutting blade relative to the conveyor belt is 0 degrees, the bottom of the cutting blade relative to the rotating direction of the conveyor belt is a positive angle, and the opposite direction is a negative angle;

[0039] Then, according to a plurality of preset historical laser reflection signal spectra generated when the cutting standard is not met, a linear regression equation between the cutting angle of the cutting blade and the time length of the historical laser reflection signal spectra is obtained;

[0040] The time length of the latest generated laser reflection signal spectrum is input into the linear regression equation to obtain the relative deviation angle of the cutting blade, and then the inverse of the relative deviation angle is taken to generate a cutting angle adjustment decision;

[0041] The cutting device adjusts the cutting direction according to the cutting angle adjustment decision until the time length of the latest generated laser reflection signal spectrum is equal to the time length of the laser reflection signal spectrum that meets the cutting standard.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. The present invention generates a finished corrugated paper image model according to a corrugated paper production instruction, sets a quality inspection cycle, and then establishes a real-time corrugated paper model under each production step according to various real-time data of the corrugated paper production process. By comparing the finished corrugated paper image model with the real-time corrugated paper model, it is determined whether there is an abnormality in the corresponding production step, and a corresponding pressure adjustment decision or cutting angle adjustment decision is generated according to the abnormality judgment result, and the status of each hardware facility is adjusted according to the pressure adjustment decision or the cutting angle adjustment decision, thereby realizing the whole process production quality inspection process of corrugated paper.

[0044] 2. The present invention combines laser detection technology with optical image detection technology to determine whether there are defects in each production step of corrugated paper in turn, and makes special adjustments to corresponding production facilities based on the defect detection results, thereby improving the accuracy of corrugated paper quality detection results while improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is the principle diagram of the present invention;

[0046] Figure 2 This is a schematic diagram of the structure of the production hardware end. DETAILED DESCRIPTION

[0047] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0048] like Figure 1 As shown, a terminal automated quality inspection system for corrugated paper production includes a cloud computing platform, wherein the cloud computing platform is communicatively connected to a production hardware terminal and a data inspection terminal;

[0049] like Figure 2 As shown, the production hardware end is provided with a raw material mixing device, a corrugated roller forming machine, a bonding machine and a cutting device, and the status of each hardware facility is adjusted according to the pressure adjustment decision or the cutting angle adjustment decision from the data detection end;

[0050] The data detection end is provided with a production data acquisition module, a quality assessment module and a defect inspection module;

[0051] The production data acquisition module installs various sensors on each hardware facility in the production hardware end, and then collects various real-time data of the corrugated paper production process of each hardware facility through various sensors;

[0052] The quality assessment module is used to obtain the corrugated paper production instructions, generate the corrugated paper finished product image model according to the corrugated paper production instructions, set the quality inspection cycle, and then establish the real-time corrugated paper model under each production step according to various real-time data of the corrugated paper production process, and then judge whether there is an abnormality in the corresponding production step by comparing the corrugated paper finished product image model with the real-time corrugated paper model, and send the abnormality judgment result to the defect inspection module;

[0053] The defect inspection module is used to generate a corresponding pressure adjustment decision or a cutting angle adjustment decision according to the abnormality judgment result, and send the pressure adjustment decision or the cutting angle adjustment decision to the production hardware end.

[0054] Further, the working principle of the present invention is specifically described below through embodiments:

[0055] The production hardware end is connected to a raw material mixing device and n groups of corrugated roller forming machines, bonding machines, cutting devices and paint spraying devices, and the above hardware facilities are connected in sequence through a conveyor belt, wherein the corrugated roller forming machine is composed of two corrugated rollers, a flattening machine, a pressure sensor, a laser sensor and a camera, the bonding machine is composed of a glue coating roller, a camera and a pressure sensor, and the cutting device is composed of multiple cutting blades, a camera and a laser sensor, n is a natural number greater than 0, and it should be noted that the corrugated roller is composed of a number of cylindrical pressure bearings of the same size;

[0056] The staff uploads the corrugated paper production instructions to the data detection terminal, wherein the corrugated paper production instructions include the corrugated paper production quantity, the product finished product image and the production steps, wherein the production steps include compression, bonding, shaping and cutting;

[0057] The data detection end sends the corrugated paper production instructions to the production data collection module, the quality assessment module and the defect inspection module at the same time. At the same time, the data detection end allocates several groups of corrugated roller forming machines, bonding machines and cutting devices according to the production steps and the corrugated paper production quantity, and sends the allocation results to the production hardware end;

[0058] Then, the production data acquisition module communicates with various sensors and cameras on the corresponding corrugated roller forming machine, bonding machine, cutting device and paint spraying device according to the deployment results;

[0059] The raw material allocation device in the production hardware end transmits the corresponding amount of production raw materials to the allocated corrugated roller forming machine through a conveyor belt according to the corrugated paper production quantity in the corrugated paper production instruction;

[0060] At the same time, the quality assessment module extracts the finished product image from the corrugated paper production instruction, generates a finished corrugated paper image model based on the finished product image, extracts the corrugated structure model from the finished corrugated paper image model, and sends the corrugated structure model to the production hardware end;

[0061] Then, the corrugated roller forming machine in the production hardware side uses the corrugated roller to compress the production raw materials into corresponding corrugated shapes according to the corrugated structure model while the conveyor belt moves the production raw materials, thereby obtaining corresponding corrugated paper parts;

[0062] Whenever a new corrugated paper is produced, the laser sensor on the corrugated roller forming machine sets i laser projection points arranged in a horizontal straight line at the position of the conveyor belt corresponding to the first corrugated roller, and sets a number a for each laser projection point. 1 、a 2 、a 3 ,……,a i , where i is a natural number greater than 0;

[0063] When the corrugated paper parts pass through the laser projection points along the conveyor belt, the laser sensor simultaneously emits laser signals to each laser projection point in the vertical direction, and generates the corresponding laser reflection signal spectrum of each laser projection point in real time, and marks the corresponding laser projection point number. At the same time, the camera and pressure sensor on the corrugated roller forming machine collect the real-time corrugated paper status video and the pressure change curve of the corrugated roller at the compression position in real time;

[0064] The production data acquisition module collects the laser reflection signal spectrum and real-time corrugated paper status video, marks the production step name, and sends the laser reflection signal spectrum and real-time corrugated paper status video to the quality assessment module.

[0065] Furthermore, a quality detection period is set, and the time length of the quality detection period is generally 0.1 ms;

[0066] The real-time corrugated paper status video is split into several video segments according to the duration of the quality detection cycle, and when the duration of subsequent real-time corrugated paper status video updates reaches the duration of the quality detection cycle, the updated portion is automatically divided into new video segments;

[0067] A real-time corrugated paper model is established based on the video clips, and the real-time corrugated paper model is automatically updated whenever a new video clip is generated;

[0068] Since the corrugated shape of corrugated paper is regularly distributed, when the corrugated roller compresses the raw materials into corrugated paper parts, if there is no abnormality in the corrugated paper production process, the laser reflection signal spectrum generated by the laser sensor at each laser projection point also shows periodic changes, and since the positions of each laser projection point are arranged in a straight line, under normal conditions, the laser reflection signal spectrum generated by each laser projection point is the same;

[0069] A two-dimensional coordinate system is established, and the laser reflection signal spectrum corresponding to each laser projection point of the same corrugated paper component is mapped onto the same two-dimensional coordinate system, and a number of time points are set on the two-dimensional coordinate system according to the quality inspection cycle;

[0070] Divide each laser reflection signal spectrum into a number of laser reflection signal segments according to the time point distribution, perform normal distribution on the laser reflection signal segments between the same pair of time points, and then select the laser reflection signal segment at the center of the normal distribution result as the normal laser reflection signal segment between the corresponding time points;

[0071] Setting a deviation threshold, comparing the normal laser reflection signal segments between each pair of time points with other laser reflection signal segments in turn, and obtaining the area value between each laser reflection signal segment and the normal laser reflection signal segment according to the comparison result;

[0072] If the area value is less than or equal to the deviation threshold, it is judged that the production at the location of the corresponding laser projection point is normal under the corresponding quality inspection cycle. Otherwise, it is judged that there is a production abnormality at the corresponding position, and the abnormality is marked at the corresponding position of the real-time corrugated paper model, and the real-time corrugated paper model is synchronized with the defect inspection module in real time.

[0073] Furthermore, when there are abnormal markings on the real-time corrugated paper model in any quality inspection cycle, the defect inspection module will overlap and map the real-time corrugated paper model with the image model of the finished corrugated paper, and then determine the position with the abnormal marking in the real-time corrugated paper model relative to the deviation of the corresponding position in the image model of the finished corrugated paper, and at the same time map the pressure change curve in the corresponding quality inspection cycle on the real-time corrugated paper model;

[0074] If the position with the abnormal mark is below or inward of the corresponding position in the finished corrugated paper image model, it is judged that the pressure of the corrugating roller at the corresponding position needs to be increased, otherwise it is judged that the pressure of the corrugating roller at the corresponding position needs to be reduced;

[0075] Then, the defect inspection module generates a roller pressure adjustment decision based on the average pressure value of the pressure change curve during the quality inspection cycle and sends it to the production hardware end. The roller pressure increase decision includes the pressure adjustment position and the pressure value adjustment range.

[0076] When the production hardware end receives the roller pressure adjustment decision, the pressure value is set for the pressure bearing at the corresponding position of the second corrugated roller according to the pressure value adjustment range in the roller pressure adjustment decision, and the pressure bearings at other positions do not operate. At the same time, the production data acquisition module collects the pressure change curve of the corresponding pressure bearing, as well as the real-time corrugated paper status video and laser reflection signal spectrum, and then repeats the roller pressure adjustment decision generation process until no abnormal production position is detected or the production of the corresponding corrugated paper component is completed.

[0077] Furthermore, the corrugated paper parts are passed through the bonding machine and the corrugated roller forming machine via a conveyor belt to perform production steps corresponding to bonding and shaping. During the bonding and shaping process, according to the types of sensors on the bonding machine and the corrugated roller forming machine, real-time corrugated paper status video, laser reflection signal spectrum or pressure change curve are collected respectively;

[0078] The process of generating roller pressure adjustment decisions is adopted. The defect inspection module generates glue roller pressure adjustment decisions and flattening machine pressure adjustment decisions respectively according to the real-time corrugated paper status video and the laser reflection signal spectrum or pressure change curve;

[0079] Then, the production hardware side controls the bonding machine and the corrugated roller forming machine to respectively perform the corresponding production steps of bonding and shaping according to the pressure adjustment decisions of the glue coating roller and the flattening machine, thereby obtaining the finished corrugated paper.

[0080] Furthermore, the conveyor belt transmission speed is set, and the quality assessment module obtains the target length of the corrugated paper according to the finished corrugated paper image model, and then sets the cutting interval time according to the conveyor belt transmission speed and the target length of the corrugated paper;

[0081] When the conveyor belt transfers the finished corrugated paper to the cutting device, the quality assessment module generates a corrugated paper cutting instruction to the production hardware end, and the corrugated paper cutting instruction includes a cutting angle and a cutting interval duration;

[0082] Then the cutting device cuts the finished corrugated paper according to the cutting angle and the cutting interval. At the same time, the laser sensor on the cutting device collects the laser reflection signal spectrum at the edge of the cut corrugated paper, and the camera collects the real-time corrugated paper status video of the cut corrugated paper.

[0083] When the cutting result at the edge of the corrugated paper meets the cutting standard, the laser reflection signal spectrum at the corresponding position has a longer time length than the laser reflection signal spectrum that does not meet the cutting standard. The vertical angle of the cutting blade relative to the conveyor belt is 0 degrees, and the bottom of the cutting blade relative to the rotation direction of the conveyor belt is a positive angle, and the opposite direction is a negative angle.

[0084] Then, according to a plurality of preset historical laser reflection signal spectra generated when the cutting standard is not met, a linear regression equation between the cutting angle of the cutting blade and the time length of the historical laser reflection signal spectra is obtained;

[0085] The time length of the latest generated laser reflection signal spectrum is input into the linear regression equation to obtain the relative deviation angle of the cutting blade, and then the inverse of the relative deviation angle is taken to generate a cutting angle adjustment decision;

[0086] The defect inspection module sends the cutting angle adjustment decision to the production hardware end, and then the cutting device adjusts the cutting direction according to the cutting angle adjustment decision until the time length of the latest generated laser reflection signal spectrum is equal to the time length of the laser reflection signal spectrum that meets the cutting standard;

[0087] Repeat the corresponding production steps of compression, bonding, shaping, cutting, and corresponding defect detection operations until the production quantity of corrugated paper specified in the corrugated paper production instruction is completed.

[0088] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A terminal automated quality inspection system for corrugated paper production, including a cloud computing platform, characterized in that: The cloud computing platform is communicatively connected with a production hardware terminal and a data detection terminal; The production hardware end is equipped with a raw material mixing device, a corrugated roller forming machine, a bonding machine, and a cutting device, and the status of each hardware facility is adjusted according to the pressure adjustment decision or cutting angle adjustment decision from the data detection end; The data detection end is provided with a production data acquisition module, a quality assessment module and a defect inspection module; The production data acquisition module is used to install various sensors on various hardware facilities in the production hardware end, and collect various real-time data of the corrugated paper production process of each hardware facility through various sensors; The process of collecting various real-time data of hardware facilities during compression, gluing and finalization includes: When the conveyor belt conveys the raw materials through the hardware facilities in sequence, the laser sensor located on the corrugated roller forming machine sets a number of laser projection points arranged in a horizontal straight line at the position of the conveyor belt corresponding to the first corrugated roller, and sets a number for each laser projection point; When the corrugated paper parts pass through the laser projection points along the conveyor belt, the laser sensor emits laser signals to each laser projection point in the vertical direction and generates the corresponding laser reflection signal spectrum of each laser projection point in real time. At the same time, the camera and pressure sensor located on the corrugated roller forming machine collect the real-time corrugated paper status video and the pressure change curve of the corrugated roller in the compression position in real time. The process of acquiring various real-time data of the corrugated roller forming machine is adopted to sequentially collect various real-time data of the bonding step performed by the bonding machine and the shaping step performed by the corrugated roller forming machine; The quality assessment module is used to obtain corrugated paper production instructions, generate a corrugated paper finished product image model according to the corrugated paper production instructions, set a quality inspection cycle, establish a real-time corrugated paper model under each production step according to various real-time data of the corrugated paper production process, and compare the corrugated paper finished product image model with the real-time corrugated paper model to determine whether there is an abnormality in the corresponding production step; The process of comparing the finished corrugated paper image model with the real-time corrugated paper model includes: The real-time corrugated paper status video is split into several video clips according to the time length of the quality inspection cycle, and a real-time corrugated paper model is established based on the video clips; Establish a two-dimensional coordinate system, map the laser reflection signal spectrum corresponding to each laser projection point onto the same two-dimensional coordinate system, and set a number of time points on the two-dimensional coordinate system; Divide each laser reflection signal spectrum into a number of laser reflection signal segments according to the time point distribution, perform normal distribution on the laser reflection signal segments between the same pair of time points, and then select the laser reflection signal segment at the center of the normal distribution result as the normal laser reflection signal segment between the corresponding time points; Setting a deviation threshold, comparing the normal laser reflection signal segments between each pair of time points with other laser reflection signal segments in turn, and obtaining the area value between each laser reflection signal segment and the normal laser reflection signal segment according to the comparison result; If the area value is less than or equal to the deviation threshold, it is judged that the production at the location of the corresponding laser projection point is normal under the corresponding quality inspection cycle; otherwise, it is judged that there is a production abnormality at the corresponding location, and the abnormality is marked at the corresponding location of the real-time corrugated paper model; The defect inspection module is used to generate a pressure adjustment decision or a cutting angle adjustment decision according to the abnormality judgment result, and send the pressure adjustment decision or the cutting angle adjustment decision to the production hardware end.

2. The terminal automated quality inspection system for corrugated paper production according to claim 1 is characterized in that: The production hardware end is communicatively connected to a raw material mixing device and a corrugated roller forming machine, a bonding machine, a cutting device and a paint spraying device. The above-mentioned hardware facilities are connected in sequence through a conveyor belt. The corrugated roller forming machine is composed of two corrugated rollers, a flattening machine, a pressure sensor, a laser sensor and a camera. The bonding machine is composed of a glue coating roller, a camera and a pressure sensor. The cutting device is composed of multiple cutting blades, a camera and a laser sensor.

3. The terminal automated quality inspection system for corrugated paper production according to claim 2 is characterized in that: The process of obtaining the corrugated paper production instruction includes: The corrugated paper production instruction includes the corrugated paper production quantity, the finished product image and the production steps, wherein the production steps include compression, bonding, shaping and cutting; The raw material allocation device in the production hardware end transmits the corresponding amount of production raw materials to the allocated corrugated roller forming machine through a conveyor belt according to the corrugated paper production quantity in the corrugated paper production instruction; A corrugated paper finished product image model is generated according to the finished product image of the product, a corrugated structure model is extracted from the corrugated paper finished product image model, and the corrugated structure model is sent to the production hardware end.

4. The terminal automated quality inspection system for corrugated paper production according to claim 3 is characterized in that: The pressure adjustment decision generation process includes: When there are abnormal annotations on the real-time corrugated paper model in any quality inspection cycle, the defect inspection module will overlap and map the real-time corrugated paper model with the image model of the finished corrugated paper, and then determine the position with abnormal annotations in the real-time corrugated paper model relative to the corresponding position in the image model of the finished corrugated paper; A pressure adjustment decision is generated based on the judgment result and sent to the production hardware end. When the production hardware end receives the pressure adjustment decision, the pressure of the second corrugated roller of the corrugated roller forming machine, the flattening machine or the gluing roller of the bonding machine is adjusted according to the pressure adjustment decision.

5. The terminal automated quality inspection system for corrugated paper production according to claim 4 is characterized in that: The execution process of the pressure adjustment decision includes: The production hardware side controls the corrugated roller forming machine and the bonding machine to perform the corresponding production steps of compression, bonding and shaping in sequence according to the pressure adjustment decision, thereby obtaining the finished corrugated paper; The conveyor belt transmission speed is set. At the same time, the quality assessment module obtains the target length of the corrugated paper according to the finished corrugated paper image model, and then sets the cutting interval time according to the conveyor belt transmission speed and the target length of the corrugated paper.

6. The terminal automated quality inspection system for corrugated paper production according to claim 5, characterized in that: The generation process of the cutting angle adjustment decision includes: The cutting device cuts the finished corrugated paper according to the cutting angle and the cutting interval. At the same time, the laser sensor on the cutting device collects the laser reflection signal spectrum at the edge of the cut corrugated paper, and the camera collects the real-time corrugated paper status video of the cut corrugated paper. The vertical angle of the cutting blade relative to the conveyor belt is 0 degrees, the bottom of the cutting blade relative to the rotating direction of the conveyor belt is a positive angle, and the opposite direction is a negative angle; Then, according to a plurality of preset historical laser reflection signal spectra generated when the cutting standard is not met, a linear regression equation between the cutting angle of the cutting blade and the time length of the historical laser reflection signal spectra is obtained; The time length of the latest generated laser reflection signal spectrum is input into the linear regression equation to obtain the relative deviation angle of the cutting blade, and the inverse of the relative deviation angle is taken to generate a cutting angle adjustment decision, and then the cutting device adjusts the cutting direction according to the cutting angle adjustment decision.

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