Intelligent sorting optimization device for corrugated cardboard

Abstract

This application relates to the fields of corrugated cardboard sorting and image processing technology, and particularly to an intelligent sorting optimization device for corrugated cardboard, comprising: a temperature-sensing compensation module; a control unit determining the optical path calibration angle of a linear laser and the calibration focal length value of an image acquisition module based on a temperature detection signal; the temperature-sensing compensation module also responding to the optical path calibration command and focal length calibration command of the control unit; a vibration suppression module disposed between the support of the feeding conveyor and the detection unit; the control unit having a built-in pixel offset correction subroutine and a real-time calibration trigger program; the control unit is also used to substitute the pixel coordinates of the laser spot after optical path calibration, focal length adjustment, and pixel offset correction into preset calculation formulas for the thickness and length of the corrugated cardboard to obtain the corrected thickness and length of the corrugated cardboard. This application improves detection accuracy and stability, ensuring the accuracy and consistency of the detection results for the length and thickness of the corrugated cardboard.

Description

Technical Field

[0001] This application relates to the fields of corrugated cardboard sorting and image processing technology, and in particular to an intelligent sorting optimization device for corrugated cardboard. Background Technology

[0002] The existing intelligent corrugated cardboard sorting device CN119838891B uses linear laser and image acquisition to detect the size, thickness, and surface flatness of corrugated cardboard. Sorting is completed through a roller-roller linkage structure, effectively solving the problem of reduced yield caused by dimensional errors and surface damage to raw cardboard in carton production. However, the temperature in carton production workshops fluctuates with production time and changes. Temperature changes can cause laser beam path shifts and focal length shifts in the image acquisition module, resulting in detection errors. Simultaneously, the high-speed movement of the conveyor line generates continuous vibrations, causing pixel shifts in the laser spot within the image. Existing intelligent corrugated cardboard sorting devices do not consider these interfering factors, easily leading to errors in calculating corrugated cardboard thickness and length. Summary of the Invention

[0003] In view of the above-mentioned technical problems, the purpose of this application is to provide an intelligent sorting and optimization device for corrugated cardboard, which aims to solve the aforementioned technical problems.

[0004] In a first aspect, embodiments of this application provide an intelligent sorting and optimization device for corrugated cardboard, including a feeding conveyor, a control unit, a sorting unit, and a detection unit disposed on the feeding conveyor. The detection unit includes a linear laser, an image acquisition module, and a support. The sorting unit sorts corrugated cardboard under the control of the control unit. The intelligent sorting and optimization device for corrugated cardboard further includes:

[0005] A temperature sensing compensation module, which is electrically connected to the control unit, is used to detect the ambient temperature and send a temperature detection signal to the control unit.

[0006] The control unit determines the optical path calibration angle of the linear laser and the calibration focal length value of the image acquisition module based on the temperature detection signal.

[0007] The temperature sensing compensation module also responds to the optical path calibration command and focal length calibration command of the control unit;

[0008] A vibration suppression module is disposed between the support of the feeding conveyor and the detection unit;

[0009] The control unit has a built-in pixel offset correction subroutine and a real-time calibration trigger program; wherein, the pixel offset correction subroutine is used to calculate and correct the pixel offset of the laser spot in the image; the real-time calibration trigger program is used to trigger the calibration actions of the optical path, focal length and pixels according to the temperature change threshold and the vibration amplitude threshold.

[0010] The control unit is also used to substitute the laser spot pixel coordinates after optical path calibration, focal length adjustment and pixel offset correction into the preset calculation formula for the thickness and length of the corrugated cardboard to obtain the corrected thickness and length of the corrugated cardboard.

[0011] In one embodiment, the temperature compensation module includes a temperature sensor, a laser optical path calibration component, and a focus adjustment component. The temperature sensor is mounted on a bracket of the detection unit and is close to the linear laser and the image acquisition module. The laser optical path calibration component includes a miniature stepper motor and an angle adjustment stage. The linear laser is fixed on the angle adjustment stage. The miniature stepper motor is driven by the angle adjustment stage and electrically connected to the control unit. The focus adjustment component is an electrically adjustable lens built into the image acquisition module and is electrically connected to the control unit.

[0012] In one embodiment, the control unit pre-stores temperature-optical path angle calibration curves and temperature-focal length calibration curves. After receiving the temperature detection signal from the temperature sensor, the control unit uses an interpolation algorithm to match the corresponding optical path calibration angle from the temperature-optical path angle calibration curve and the corresponding calibration focal length value from the temperature-focal length calibration curve. It then controls the micro stepper motor to drive the angle adjustment stage to rotate to the calibration angle and controls the electric focusing lens to adjust to the matching focal length.

[0013] In one embodiment, the vibration suppression module is a multi-layer composite vibration damping pad, which includes a silicone buffer layer, a metal damping layer, and a rubber vibration absorbing layer that are sequentially bonded from top to bottom. The silicone buffer layer is fixedly connected to the bottom of the support 210 of the detection unit, and the rubber vibration absorbing layer is fixedly connected to the frame of the feeding conveyor unit. The vibration suppression module also includes a vibration sensor, which is located at the feeding conveyor unit and electrically connected to the control unit. The vibration sensor is used to detect the vibration amplitude of the conveyor line and send a vibration signal to the control unit.

[0014] In one embodiment, the working logic of the pixel offset correction subroutine is as follows:

[0015] S1. The control unit calculates the offset ΔP of the laser spot in the image acquisition module based on the vibration signal from the vibration sensor.

[0016] S2. Using the laser spot pixel coordinates when the conveyor line is vibration-free as a reference, perform reverse compensation on the currently acquired spot pixel coordinates. The compensation formula is as follows:

[0017] ;

[0018] The corrected laser spot coordinates, The coordinates of the acquired laser spot. This represents the offset of the laser spot.

[0019] In one embodiment, the linear laser generates a light curtain that is inclined to the conveying surface of the feeding conveyor. The light curtain forms a linear light spot perpendicular to the flow direction on the corrugated paper and the feeding conveyor. The control unit acquires image information of the corrugated paper in real time through the image acquisition module and calculates the size of the corrugated paper.

[0020] This embodiment of the application arranges a temperature sensor close to the detection unit bracket and adjacent to the linear laser and image acquisition module, enabling accurate and real-time acquisition of the ambient temperature of the detection area, providing reliable data for temperature drift compensation. A laser optical path calibration component is constructed using a micro stepper motor and an angle adjustment stage, allowing for fine and dynamic adjustment of the linear laser's optical path angle under the control unit's drive, effectively offsetting laser optical path offset caused by temperature changes. The image acquisition module's built-in motorized focusing lens serves as a focus adjustment component, enabling rapid and automatic adjustment of the acquisition focus based on the temperature signal, avoiding focus shift and image blurring caused by temperature fluctuations. This achieves closed-loop adaptive compensation for temperature interference, improving detection accuracy and stability, and ensuring the accuracy and consistency of corrugated cardboard length and thickness detection results. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a simplified top view of the overall structure of the intelligent sorting and optimization device for corrugated cardboard provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the detection section of the intelligent sorting and optimization device for corrugated cardboard provided in the embodiments of this application;

[0024] Figure 3 This is a schematic diagram illustrating the principle of the detection unit detecting the thickness of corrugated paper in the intelligent corrugated paper sorting device provided in this application embodiment;

[0025] Figure 4 This is a schematic diagram of the vibration suppression module in the intelligent corrugated cardboard sorting device provided in the embodiments of this application.

[0026] Reference numerals: 100, feeding conveyor; 200, detection department; 300, sorting department; 400, control department; 500, transfer conveyor; 600, sorting conveyor; 210, support frame; 220, linear laser; 230, image acquisition module; 701, silicone buffer layer; 702, metal damping layer; 703, rubber vibration absorption layer; 704, vibration sensor; 800, temperature sensor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] Those skilled in the art will understand that, unless explicitly stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in the specification of this application means the presence of features, integers, steps, operations, elements, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any modules and all combinations of one or more associated listed items.

[0029] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have a meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0030] like Figure 1-3As shown in the illustration, this application provides an intelligent sorting and optimization device for corrugated cardboard. The device includes a feeding conveyor 100, a control unit 400, a sorting unit 300, and a detection unit 200 mounted on the feeding conveyor. The detection unit 200 includes a linear laser 220, an image acquisition module 230, and a support 210. The sorting unit 300 sorts corrugated cardboard under the control of the control unit 400. The device also includes a temperature compensation module electrically connected to the control unit 400, used to detect ambient temperature and send a temperature detection signal to the control unit 400. The control unit 400 determines the optical path calibration angle of the linear laser 220 and the calibration focal length value of the image acquisition module 230 based on the temperature detection signal. The temperature compensation module also responds to the optical path calibration command and focal length calibration command from the control unit 400. The device further includes a vibration suppression module located between the feeding conveyor 100 and the support 210 of the detection unit 200. The control unit 400 has a built-in pixel offset correction subroutine and a real-time calibration trigger program. The pixel offset correction subroutine is used to calculate and correct the pixel offset of the laser spot in the image. The real-time calibration trigger program is used to trigger the calibration actions of the optical path, focal length and pixels according to the temperature change threshold and vibration amplitude threshold. The control unit 400 is also used to substitute the pixel coordinates of the laser spot after optical path calibration, focal length adjustment and pixel offset correction into the preset calculation formula of corrugated cardboard thickness and length to obtain the corrected corrugated cardboard thickness and length.

[0031] In one embodiment, when the laser of the linear laser 220 irradiates the corrugated paper, it generates a linear light spot perpendicular to the flow direction of the feeding conveyor 100. The light curtain of the laser of the linear laser 220 is inclined to the conveying surface of the feeding conveyor 100. The image acquisition module 230 is used to acquire image information of the corrugated paperboard and send it to the control unit 400. The control unit 400 calculates the dimensions of the corrugated paperboard based on the image information sent by the image acquisition module 230, including the thickness, length and width of the corrugated paperboard. The corrugated cardboard passes under the detection unit 200 under the drive of the feeding conveyor 100. When the linear laser 220 contacts the edge of the corrugated cardboard, the image acquisition module 230 records the image information at this time, which is recorded as the first image. After a preset time, the image acquisition module 230 acquires an image of the corrugated cardboard, which is recorded as the second image. In the second image, there is a linear light spot on the surface of the corrugated cardboard. When the linear laser 220 contacts the edge of the corrugated cardboard for the second time, the image acquisition module 230 acquires the image at this time, which is recorded as the third image.

[0032] like Figure 3As shown, in the second image acquired by the image acquisition module, there are two light spots: a first light spot and a second light spot. The first light spot is a spot on the conveyor line, and the second light spot is a spot on the corrugated cardboard. Let A be the actual distance between the first light spot and the central axis of the image acquisition module 230, and let A be the pixel distance between the first light spot and the center of the image. The ratio of pixel distance within the image to the actual distance is . Let the pixel distance between the first and second light spots be m, then the actual distance M between the first and second light spots is... Given that the angle between the light curtain of a linear laser and its central axis is... The formula for calculating the thickness of corrugated cardboard is: After calculating the thickness of the corrugated cardboard, the distance between the upper surface of the corrugated cardboard and the focal point of the image acquisition module 230 can be calculated. Then, the length of the corrugated cardboard is obtained based on the length of the second light spot in the image. The formula for calculating the length of the corrugated cardboard is as follows: Where W is the length of the corrugated cardboard, w is the length of the second light spot, h is the distance from the focal point of the image acquisition module 230 to the conveying surface of the feeding conveyor, and f is the focal length of the image acquisition module. It should be understood that the pixel distance between the first light spot and the second light spot can be calculated based on their coordinates. In addition to calculating the thickness and length of the corrugated cardboard, the width of the corrugated cardboard is further calculated using the following formula: Where v is the speed of the conveyor line and t is the interval between the two ends of the linear laser passing through the edges of the corrugated cardboard.

[0033] Specifically, such as Figure 1-2As shown, during corrugated cardboard feeding, the feeding device on the carton production line places the corrugated cardboard onto the feeding conveyor 100. The corrugated cardboard moves with the feeding conveyor 100. During the process of the corrugated cardboard moving to the sorting section 300, it flows through the detection section 200. The detection section 200 collects data information for calculating the size of the corrugated cardboard. During this period, the temperature compensation module detects the ambient temperature and sends a temperature detection signal to the control section 400. The control section 400 determines the optical path calibration angle of the linear laser 220 and the calibration focal length value of the image acquisition module 230 based on the temperature detection signal, and sends an optical path calibration command and a focal length calibration command to the temperature compensation module. The optical path calibration command includes the optical path calibration angle, and the focal length calibration command includes the calibration focal length value. The temperature compensation module performs calibration in response to the optical path calibration command and focal length calibration command from the control section, improving the accuracy of the data information collected by the detection section 200. The control unit 400 calculates the corrugated cardboard size based on the data collected by the detection unit 200, obtaining the detection result. The control unit 400 includes a built-in pixel offset correction subroutine, which calculates and corrects the pixel offset of the laser spot in the image, thereby improving the accuracy of the corrugated cardboard size calculation. Furthermore, the control unit 400 also includes a built-in real-time calibration trigger program, used to trigger calibration actions for the optical path, focal length, and pixels based on temperature change thresholds and vibration amplitude thresholds, improving stability. Based on the detection result, the control unit 400 controls the sorting unit 300 to control the flow direction of the corrugated cardboard. For example, when the size of the corrugated cardboard meets a preset value, the sorting unit 300 controls the corrugated cardboard to flow to the next process, thereby preventing dimensional errors that would lead to non-compliance.

[0034] Furthermore, such as Figure 1 As shown, the intelligent sorting and optimization device for corrugated cardboard also includes a transfer conveyor 500, which is located downstream of the sorting unit 300. The transfer conveyor 500 is a conveyor belt structure and is used to transport corrugated cardboard with qualified dimensions (length, width, and thickness) to the carton production line.

[0035] Furthermore, such as Figure 1 As shown, the intelligent sorting and optimization device for corrugated cardboard also includes a sorting and conveying section 600, which is located on the side of the sorting section 300. The sorting section 300 conveys corrugated cardboard whose size does not conform to the preset value to the sorting and conveying section 600, which then conveys it to the collection position. The sorting and conveying section 600 is a conveyor belt structure.

[0036] The intelligent sorting and optimization device for corrugated cardboard provided in this application embodiment adds a temperature sensing compensation module and a vibration suppression module, and integrates a pixel offset correction subroutine and a real-time calibration trigger program in the control unit. It can detect changes in ambient temperature in real time and adaptively calibrate the optical path angle of the linear laser and the focal length of the image acquisition module according to the temperature changes. At the same time, it effectively reduces the vibration interference caused by the high-speed operation of the conveyor line, accurately calculates and corrects the pixel offset of the laser spot, reduces detection errors from the two major sources of interference, temperature drift and mechanical vibration, improves the stability and accuracy of the length and thickness of corrugated cardboard, and thus improves the accuracy of cardboard sorting and the production yield, adapting to the complex and ever-changing actual working conditions of the carton production workshop.

[0037] In one embodiment, such as Figure 2 As shown, the temperature compensation module includes a temperature sensor 800, a laser optical path calibration component, and a focus adjustment component. The temperature sensor is mounted on the bracket of the detection unit and is close to the linear laser and the image acquisition module. The laser optical path calibration component includes a miniature stepper motor and an angle adjustment stage. The linear laser is fixed on the angle adjustment stage. The miniature stepper motor is driven by the angle adjustment stage and electrically connected to the control unit. The focus adjustment component is an electrically adjustable lens built into the image acquisition module. The electrically adjustable lens is electrically connected to the control unit.

[0038] This embodiment of the application arranges a temperature sensor close to the detection unit bracket and adjacent to the linear laser and image acquisition module, enabling accurate and real-time acquisition of the ambient temperature of the detection area, providing reliable data for temperature drift compensation. A laser optical path calibration component is constructed using a micro stepper motor and an angle adjustment stage, allowing for fine and dynamic adjustment of the linear laser's optical path angle under the control unit's drive, effectively offsetting laser optical path offset caused by temperature changes. The image acquisition module's built-in motorized focusing lens serves as a focus adjustment component, enabling rapid and automatic adjustment of the acquisition focus based on the temperature signal, avoiding focus shift and image blurring caused by temperature fluctuations. This achieves closed-loop adaptive compensation for temperature interference, improving detection accuracy and stability, and ensuring the accuracy and consistency of corrugated cardboard length and thickness detection results.

[0039] In one embodiment, the control unit pre-stores temperature-optical path angle calibration curves and temperature-focal length calibration curves. After receiving the temperature detection signal from the temperature sensor, the control unit uses an interpolation algorithm to match the corresponding optical path calibration angle from the temperature-optical path angle calibration curve and the corresponding calibration focal length value from the temperature-focal length calibration curve. It then controls the micro stepper motor to drive the angle adjustment stage to rotate to the calibration angle and controls the electric focusing lens to adjust to the matching focal length.

[0040] This application embodiment, by pre-storing temperature-optical path angle calibration curves and temperature-focal length calibration curves in the control unit and combining them with interpolation algorithms to process the temperature detection signal in real time, can quickly and accurately match the optical path calibration angle and focal length value adapted to the current ambient temperature. This enables closed-loop, adaptive control of the micro stepper motor and the motorized focusing lens, effectively avoiding laser optical path offset and image acquisition focal length drift caused by temperature fluctuations. It improves the response speed and adjustment accuracy of temperature compensation, ensures stable and reliable detection data, and further enhances the accuracy and consistency of corrugated cardboard size and thickness detection. It should be understood that the optical path calibration angle refers to the angle parameter required to correct for linear laser optical path offset caused by temperature changes and to stabilize laser projection; the calibration focal length value refers to the focal length parameter required to adjust to eliminate focal length offset caused by temperature fluctuations. The temperature-optical path angle calibration curve and the temperature-focal length calibration curve are obtained in advance through offline calibration experiments: under different set temperature conditions, the optical path offset of the linear laser and the focal length offset of the image acquisition module are detected respectively. The compensation angle that resets the laser optical path to the standard projection position and the compensation focal length that makes the image clear are recorded at the corresponding temperature. Multiple sets of temperature and corresponding compensation angle and compensation focal length data are fitted and processed to form the temperature-optical path angle calibration curve and the temperature-focal length calibration curve, which are then stored in the control unit in advance.

[0041] In one embodiment, such as Figure 4 As shown, the vibration suppression module is a multi-layer composite vibration damping pad, which includes a silicone buffer layer 701, a metal damping layer 702, and a rubber vibration absorbing layer 703 sequentially bonded together from top to bottom. The silicone buffer layer 701 is fixedly connected to the bottom of the support 210 of the detection unit 200, and the rubber vibration absorbing layer 703 is fixedly connected to the frame of the feeding conveyor unit 100. The vibration suppression module also includes a vibration sensor 704, which is located at the feeding conveyor unit and electrically connected to the control unit. The vibration sensor is used to detect the vibration amplitude of the conveyor line and send a vibration signal to the control unit.

[0042] In this embodiment, the vibration suppression module employs a multi-layer composite vibration damping pad composed of a silicone buffer layer, a metal damping layer, and a rubber vibration absorbing layer. By gradually attenuating and absorbing the mechanical vibration generated by the high-speed operation of the feeding conveyor in multiple dimensions, it can reduce the transmission of vibration to the support of the detection unit, structurally weakening the interference of vibration on laser detection and image acquisition. Simultaneously, in conjunction with the vibration sensor installed in the feeding conveyor, it can collect the vibration amplitude of the conveyor line in real time and feed it back to the control unit, providing reliable data support for subsequent vibration amplitude judgment, calibration triggering, and pixel offset correction, improving the stability and detection accuracy of laser spot imaging, and ensuring the reliability and consistency of the detection results of corrugated cardboard length and thickness.

[0043] In one embodiment, the working logic of the pixel offset correction subroutine is as follows:

[0044] S1. The control unit calculates the offset ΔP of the laser spot in the image acquisition module based on the vibration signal from the vibration sensor.

[0045] S2. Using the laser spot pixel coordinates when the conveyor line is vibration-free as a reference, perform reverse compensation on the currently acquired spot pixel coordinates. The compensation formula is as follows:

[0046] ;

[0047] The corrected laser spot coordinates, The coordinates of the acquired laser spot. This represents the offset of the laser spot.

[0048] In this embodiment, the upper left corner of the imaging plane of the image acquisition module is defined as the origin (0,0), the X-axis is positive (horizontal to the right), and the Y-axis is positive (vertical downward). The horizontal laser spot offset is... The light spot shifted to the right. The light spot is positive; it shifts to the left. Negative; vertical laser spot offset: the spot shifts downwards. It is positive; the light spot shifts upwards. It is negative.

[0049] The control unit calculates the pixel offset ΔP of the laser spot in the image acquisition module based on the vibration signal from the vibration sensor. Specifically, the control unit acquires the vibration acceleration signal of the conveyor line output by the vibration sensor in real time, performs two time-domain integrations on it, and converts it into vibration displacement signals of the detection unit support 210 in the X horizontal direction and Y vertical direction. , Furthermore, by using bandpass filtering to remove environmental noise and non-target vibration interference, the effective horizontal and vertical vibration components related to the operation of the conveyor line are extracted. Call the displacement-pixel conversion coefficients obtained from pre-offline calibration. (The unit is pixels / length, i.e., pixels divided by displacement), converting the physical displacement of vibration into pixel offset, where, , , This represents the horizontal pixel offset. This is the vertical pixel offset. If... This indicates that the laser spot is offset along the positive X-axis direction (horizontally to the right); if This indicates an offset along the negative X-axis direction (horizontally to the left); if This indicates that the laser spot is offset along the positive Y-axis direction (vertically downward); if This indicates an offset along the negative Y-axis (vertically upwards). Total pixel offset. .

[0050] This application's embodiments calculate the pixel offset of the laser spot based on vibration sensor signals, using the spot pixel coordinates in a vibration-free state as a reference, and employ... The compensation formula corrects the current spot coordinates in reverse, which can reduce the laser spot pixel offset caused by conveyor line vibration, reduce the interference of vibration on imaging detection, improve the accuracy and stability of laser spot pixel coordinates, provide a reliable data basis for the subsequent accurate calculation of corrugated cardboard thickness and length, and effectively improve the detection accuracy and anti-interference capability of the sorting device.

[0051] In one embodiment, the real-time calibration trigger program presets a temperature change threshold. and vibration amplitude threshold When the control unit detects a change in ambient temperature ≥ When the vibration amplitude of the conveyor line is detected to be ≥A0, the pixel offset correction subroutine is triggered to run continuously until the vibration amplitude is <A0.

[0052] This application embodiment automatically triggers dynamic calibration of the optical path and focal length when the change in ambient temperature reaches a preset threshold, which can promptly offset the impact of temperature drift on detection accuracy and avoid the resource consumption caused by continuous calibration; when the vibration amplitude of the conveyor line exceeds the threshold, the pixel offset correction subroutine is automatically started and continues to run until the vibration returns to stability, which can accurately cope with sudden and continuous vibration interference scenarios.

[0053] It should be noted that the technical solutions in the embodiments of this specification, if involving the processing of personal information, will all be processed under the premise of having a legal basis (such as obtaining the consent of the personal information subject), and will only be processed within the scope stipulated or agreed. The collection, storage, use, processing, transmission, provision, and presentation of related information all comply with the provisions of relevant laws and regulations, do not infringe on the privacy of others, and do not violate public order and good morals.

[0054] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in this application and in the embodiments can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual-speed SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0055] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, apparatus, article, or method. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or method that includes that element.

[0056] The above description is only a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A smart sorting and optimization device for corrugated cardboard, comprising a feeding conveyor, a control unit, a sorting unit, and a detection unit disposed on the feeding conveyor, wherein the detection unit includes a linear laser, an image acquisition module, and a support, and the sorting unit sorts corrugated cardboard under the control of the control unit, characterized in that, Also includes: A temperature sensing compensation module, which is electrically connected to the control unit, is used to detect the ambient temperature and send a temperature detection signal to the control unit. The control unit determines the optical path calibration angle of the linear laser and the calibration focal length value of the image acquisition module based on the temperature detection signal. The temperature sensing compensation module also responds to the optical path calibration command and focal length calibration command of the control unit; A vibration suppression module is disposed between the support of the feeding conveyor and the detection unit; The control unit has a built-in pixel offset correction subroutine and a real-time calibration trigger program; wherein, the pixel offset correction subroutine is used to calculate and correct the pixel offset of the laser spot in the image; the real-time calibration trigger program is used to trigger the calibration actions of the optical path, focal length and pixels according to the temperature change threshold and the vibration amplitude threshold. The control unit is also used to substitute the laser spot pixel coordinates after optical path calibration, focal length adjustment and pixel offset correction into the preset calculation formula for the thickness and length of the corrugated cardboard to obtain the corrected thickness and length of the corrugated cardboard.

2. The intelligent sorting and optimization device for corrugated cardboard according to claim 1, characterized in that, The temperature compensation module includes a temperature sensor, a laser optical path calibration component, and a focus adjustment component. The temperature sensor is mounted on a bracket of the detection unit and is close to the linear laser and the image acquisition module. The laser optical path calibration component includes a miniature stepper motor and an angle adjustment stage. The linear laser is fixed on the angle adjustment stage. The miniature stepper motor is driven by the angle adjustment stage and electrically connected to the control unit. The focus adjustment component is an electrically adjustable lens built into the image acquisition module and is electrically connected to the control unit.

3. The intelligent sorting and optimization device for corrugated cardboard according to claim 2, characterized in that, The control unit pre-stores temperature-optical path angle calibration curves and temperature-focal length calibration curves. After receiving the temperature detection signal from the temperature sensor, the control unit uses an interpolation algorithm to match the corresponding optical path calibration angle from the temperature-optical path angle calibration curve and the corresponding calibration focal length value from the temperature-focal length calibration curve. It then controls the micro stepper motor to drive the angle adjustment stage to the calibration angle and controls the electric focusing lens to adjust to the matching focal length.

4. The intelligent sorting and optimization device for corrugated cardboard according to claim 1, characterized in that, The vibration suppression module is a multi-layer composite vibration damping pad, which includes a silicone buffer layer, a metal damping layer, and a rubber vibration absorbing layer that are sequentially bonded from top to bottom. The silicone buffer layer is fixedly connected to the bottom of the support 210 of the detection unit, and the rubber vibration absorbing layer is fixedly connected to the frame of the feeding conveyor unit. The vibration suppression module also includes a vibration sensor, which is located at the feeding conveyor unit and electrically connected to the control unit. The vibration sensor is used to detect the vibration amplitude of the conveyor line and send a vibration signal to the control unit.

5. The intelligent sorting and optimization device for corrugated cardboard according to claim 4, characterized in that, The working logic of the pixel offset correction subroutine is as follows: S1. The control unit calculates the offset ΔP of the laser spot in the image acquisition module based on the vibration signal from the vibration sensor. S2. Using the laser spot pixel coordinates when the conveyor line is vibration-free as a reference, perform reverse compensation on the currently acquired spot pixel coordinates. The compensation formula is as follows: ； The corrected laser spot coordinates, The coordinates of the acquired laser spot. This represents the offset of the laser spot.

6. The intelligent sorting and optimization device for corrugated cardboard according to claim 1, characterized in that, The linear laser generates a light curtain that is inclined to the conveying surface of the feeding conveyor. The light curtain forms a linear light spot perpendicular to the flow direction on the corrugated paper and the feeding conveyor. The control unit acquires the image information of the corrugated paper in real time through the image acquisition module and calculates the size of the corrugated paper.

Images