Automatic quality detection device and detection method after paper disc segmentation

Abstract

The invention relates to an automatic quality detection device and detection method after paper disc segmentation, and belongs to the technical field of bobbin paper production detection equipment. Comprising a support frame, a variable pitch structure, a clamping structure and a section detection assembly. The variable-pitch structure is installed on the supporting frame and provided with a plurality of sliding parts, and the sliding parts can form uniform intervals relative to the supporting frame after pitch changing; the clamping structure is mounted on the sliding part and is provided with a clamping part corresponding to the sliding part, and the clamping part is provided with a size-adjustable accommodating space used for abutting against the circumferential surface of the paper disc so as to measure the tightness degree of the bobbin paper; the section detection assembly is installed on the clamping part and used for detecting and collecting the section of the bobbin paper. The paper trays are evenly distributed on the supporting frame by arranging the variable-pitch structure to be matched with the clamping parts installed on the sliding parts, then the tightness degree of the paper trays and the flatness of tangent planes are rapidly detected through the clamping parts and the tangent plane detection assembly, multiple batches of paper trays after slitting can be detected at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of paper disc production detection equipment, and in particular relates to an automatic quality detection device and detection method after paper disc cutting. Background Art

[0002] In the production and processing of paper coils, the paper roll needs to be cut into several paper coils, and the cut surface of each paper coil needs to be inspected as well as the tightness of the paper coil. Traditional paper coil quality inspection in this industry mainly relies on manual operation, which has many problems. For the flatness inspection of the two end surfaces of the paper coil, people usually judge the quality of the cut surface by direct observation with the naked eye, using tools to assist inspection, or even relying on simple manual touch. However, this judgment method relying on simple inspection by manual senses or tools is highly subjective. Due to individual differences in experience, vision, etc. of different operators, as well as certain errors in the use of inspection tools, it is difficult to achieve a high degree of uniformity and accuracy in the judgment standard, which will have an adverse effect on the quality of the final paper coil product.

[0003] The patent with announcement number CN106115351A provides a loose tray detection device for cigarette packaging paper, including a motor, a cam connected to the motor, and a transmission shaft arranged below the cam. The transmission shaft is vertically arranged below the cam, and the top of the transmission shaft is provided with an end plate that contacts and transmits with the cam. A reset spring and a sleeve are sleeved on the transmission shaft. The reset spring is arranged between the sleeve and the end plate. A tensioning shaft is provided at the lower end of the transmission shaft. The tensioning shaft is used to insert into the tube core of the paper tray. A first displacement sensor and a second displacement sensor are provided on the bottom surface of the sleeve, wherein the first displacement sensor is located above the paper tray surface, and the second displacement sensor is located above the paper tray tube core.

[0004] The prior art has at least the following problems during use:

[0005] By setting up multiple displacement sensors and abutment devices along the axial direction of the paper tray, the displacement of different sensors in the axial direction of the same paper tray is tested to show the tightness. The detection process requires repeated fixation and clamping and the flatness of the cutting surface cannot be detected. Summary of the invention

[0006] The present invention provides an automatic quality detection device and detection method after paper tray slitting, which is used to solve the technical problem that in the prior art, multiple displacement sensors are set, and abutment devices are set along the axial direction of the paper tray to test the displacement of different sensors in the axial direction of the same paper tray to show the tightness, and the detection process requires repeated fixing and clamping, and the flatness of the slitting surface cannot be detected.

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

[0008] An automatic quality inspection device for paper trays after cutting, comprising: a support frame, a variable pitch structure, a clamping structure, and a cut surface detection assembly. The variable pitch structure is installed on the support frame, and has a plurality of sliding parts, and the sliding parts will form a uniform interval relative to the support frame after the pitch is changed; the clamping structure is installed on the sliding part, and has a clamping part corresponding to the sliding part, and the clamping part has an adjustable accommodation space for abutting against the circumferential surface of the paper tray to measure the tightness of the paper tray; the cut surface detection assembly is installed on the clamping part, and is used to detect and collect the cut surface of the paper tray.

[0009] Furthermore, it comprises: a fixed cover plate, a rotating cover plate, a support rod, and a plurality of sliders. The fixed cover plate is mounted on the support frame; the rotating cover plate is rotatably mounted on the support frame; one end of the support rod is mounted on the rotating cover plate, and the other end is detachably mounted on the fixed cover plate, and the support rod rotates with the rotating cover plate relative to the support frame; a plurality of sliders are slidably distributed on the support rod, and are used to assist the variable pitch structure in driving the paper roll to slide relative to the support rod to form a uniform gap.

[0010] Furthermore, the clamping structure includes: a plurality of pressure blocks, a displacement sensor, and a pressure sensor. The plurality of pressure blocks are respectively mounted on the clamping portion, and the size of the accommodation space is adjusted by driving the pressure blocks to slide in the radial direction of the paper tray; the displacement sensor is mounted on the clamping portion to record the displacement of the pressure block; and the pressure sensor is mounted on the pressure block to record and control the pressure applied by the pressure block to the paper tray.

[0011] Furthermore, the cut surface detection assembly includes: a laser positioning device and a visual acquisition device. The laser positioning device is fixed on the clamping part and is used to position the paper tray; the visual acquisition device is fixed on the clamping part and is used to record the cut surface of the paper tray.

[0012] Furthermore, it also includes: a processing center and a barcode sticking device. The processing center is connected to the clamping structure and the section detection component for recording and processing the relevant data of the paper tray; the barcode sticking device is used to stick the barcode to the paper tray according to the data recorded by the processing center and under the control of the processing center.

[0013] Further, the clamping part is composed of a first clamping portion and a second clamping portion, and the second clamping portion rotates relative to the first clamping portion, and a driver for driving the clamping portion to rotate is correspondingly provided.

[0014] A method for detecting paper trays after cutting, comprising the following steps:

[0015] S1, releasing the connection between the support rod and the fixed cover plate, rotating the rotating cover plate, and driving the support rod to rotate relative to the support frame;

[0016] S2, sleeve the paper tray on the support rod, and make the inner wall of the inner core of the paper tray abut against the slider and correspond one to one;

[0017] S3, driving the plurality of second clamping parts to rotate in a direction away from the first clamping part, rotating the rotating cover plate, moving the support rod and the paper tray between the first clamping part and the second clamping part, and fixing the other end of the support rod to the fixed cover plate to complete the installation;

[0018] S4, driving the plurality of second clamping parts to rotate toward the direction close to the first clamping part, and driving the pressing block to abut against the peripheral side of the paper tray for the first time;

[0019] S4, driving the sliding part on the variable pitch structure to slide along the axial direction of the support rod, driving the slider to carry the paper tray evenly distributed on the support rod, and recording the displacement L0 of the displacement sensor and the pressure value P0 of the pressure sensor at this time;

[0020] S5, driving the pressing block to slide along the radial direction of the paper tray, reducing the size of the accommodation space, and stopping the sliding of the pressing block when the pressure value P0 of the pressure sensor is consistent with the calibration value P, and recording the displacement L1 at this time;

[0021] S6, obtaining the positions of the two cut surfaces of the paper tray by means of a laser positioning device, and recording the corresponding paper tray width value D0;

[0022] S7, photographing the section through a visual acquisition system and uploading it to a processing center;

[0023] S8, by comparing the difference between L1 and L0 and the difference between the paper tray width D0 and the process standard width D in the processing center, and comparing and analyzing the comprehensive cross-sectional images, the quality category of the corresponding paper tray is obtained;

[0024] S9, entering the corresponding information into the barcode, and pasting the barcode with the entered information onto the side of the corresponding paper tray by the barcode paster to complete the detection;

[0025] S10, cancelling the fixed connection between the support rod and the fixed cover plate, and outputting the detected paper tray.

[0026] The present invention provides a device and method for automatically detecting the quality of paper trays after cutting, and the beneficial effects are as follows:

[0027] By setting a variable pitch structure in cooperation with the clamping part installed on the sliding part, the paper trays are evenly distributed on the support frame, and then the tightness of the paper trays and the flatness of the cut surface are quickly detected through the clamping part and the cut surface detection component, and multiple batches of paper trays after cutting can be detected simultaneously, thereby improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of an automatic quality inspection device after paper tray cutting provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of an automatic quality inspection device for paper tray slicing provided by an embodiment of the present invention when receiving a paper tray;

[0031] Figure 3 A schematic diagram of the structure of an automatic quality inspection device for paper trays after cutting provided by an embodiment of the present invention without a clamping portion;

[0032] Figure 4 A schematic diagram of the installation structure of the first clamping part and the second clamping part provided in an embodiment of the present invention.

[0033] In the figure: 10-support frame; 20-variable distance structure; 201-sliding part; 301-first clamping part; 302-second clamping part; 303-accommodating space; 40-section detection component; 101-fixed cover plate; 102-rotating cover plate; 103-support rod; 104-slider; 304-pressing block; 104-code sticking device. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be welding, bolt connection, or riveting; it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Example:

[0039] based on Figures 1 to 4 As shown, this embodiment provides an automatic quality inspection device after paper tray cutting, including: a support frame 10, a variable pitch structure 20, a clamping structure, and a cut surface detection assembly 40. The variable pitch structure 20 is installed on the support frame 10, and has a plurality of sliding parts 201. The sliding parts 201 are relatively to the support frame 10, and form a uniform interval after the pitch is changed; the clamping structure is installed on the sliding part 201, and has a clamping part corresponding to the sliding part 201. The clamping part has an adjustable accommodation space 303, which is used to abut the circumferential surface of the paper tray to measure the tightness of the paper tray; the cut surface detection assembly 40 is installed on the clamping part, and is used to detect and collect the cut surface of the paper tray.

[0040] In this embodiment, if Figures 1 to 4 As shown, the variable pitch structure 20 can specifically be a connecting rod variable pitch structure 20 or a lead screw variable pitch structure 20 in the prior art, the sliding part 201 is a plurality of sliders 104 positioned and installed on the variable pitch structure 20, the clamping structure is an arc-shaped clamping member, and the clamping part adjusts the size of the accommodating space 303. When the accommodating space 303 becomes larger, it is suitable for moving the paper tray into the accommodating space 303, and when the accommodating space 303 becomes smaller, it is suitable for abutting the paper tray and fixing it on the clamping structure. Finally, the variable pitch structure 20 is combined to evenly disperse the paper tray in the axial direction, and the tightness of the sensor after cutting is judged by analyzing the tightness of the sensor when the paper tray is clamped, and the cutting quality is judged by detecting the neatness of the cut surface, so as to facilitate marking and classification and screening of paper trays of different qualities.

[0041] Further, in some implementations of this embodiment, Figures 1 to 4As shown, it includes: a fixed cover plate 101, a rotating cover plate 102, a support rod 103, and a plurality of sliders 104. The fixed cover plate 101 is mounted on the support frame 10; the rotating cover plate 102 is rotatably mounted on the support frame 10; one end of the support rod 103 is mounted on the rotating cover plate 102, and the other end is detachably mounted on the fixed cover plate 101, and the support rod 103 rotates relative to the support frame 10 with the rotating cover plate 102; a plurality of sliders 104 are slidably distributed on the support rod 103, and are used to assist the variable pitch structure 20 in driving the paper roll to slide relative to the support rod 103 to form a uniform gap.

[0042] In this embodiment, if Figures 1 to 4 As shown, the rotating cover plate 102 is arranged on the side of the support frame 10 away from the fixed cover plate 101 through a rotating hinge, one end of the support rod 103 is fixed on the rotating cover plate 102, and a clamping block is arranged on the other side, and a positioning hole is opened. Correspondingly, a mounting base for docking the clamping block is arranged on the fixed cover plate 101, and a mounting hole matching the positioning hole is arranged. A fixing pin is arranged on the mounting base, which is used to pass through the mounting hole and the positioning hole to fix the movable end of the support rod 103 on the mounting base, thereby completing the installation of the paper tray and the entire device. The slider 104 is an annular slider 104, which is sleeved on the support rod 103, and a plurality of rollers are provided on the contact surface between the slider 104 and the support rod 103. The slider 104 corresponds to the paper tray one by one. When the paper tray is installed on the support rod 103, the paper tray and the plurality of sliders 104 are abutted one by one. The weight of the paper tray is used for initial contact first, and then the accommodating space 303 is reduced to make a simple deformation of the paper tray, so that the paper tray and the slider 104 are further abutted, so that the paper tray and the slider 104 can be quickly separated on the support rod 103.

[0043] Further, in some implementations of this embodiment, Figures 1 to 4 As shown, the clamping structure includes: a plurality of pressing blocks 304, a displacement sensor, and a pressure sensor. The plurality of pressing blocks 304 are respectively mounted on the clamping part, and the size of the accommodating space 303 is adjusted by driving the pressing blocks 304 to slide in the radial direction of the paper tray; the displacement sensor is mounted on the clamping part to record the displacement of the pressing blocks 304; the pressure sensor is mounted on the pressing blocks 304 to record and control the pressure applied by the pressing blocks 304 to the paper tray.

[0044] In this embodiment, if Figures 1 to 4 As shown, the pressure block 304 is a telescopic rod equipped with a soft rubber contact head, and the telescopic rod is specifically controlled by a cylinder. The displacement sensor can specifically adopt an inductive displacement sensor to detect and control the telescopic rod. The pressure sensor is installed on the contact surface of the telescopic rod, and specifically can adopt a piezoresistive pressure sensor. This type of sensor has only strict requirements on the working environment and load capacity, and is more suitable for contact and pressure detection of paper trays.

[0045] Further, in some implementations of this embodiment, Figures 1 to 4 As shown, the cut surface detection assembly 40 includes: a laser positioning device and a visual acquisition device. The laser positioning device is fixed on the clamping part and is used to position the paper tray; the visual acquisition device is fixed on the clamping part and is used to record the cut surface of the paper tray.

[0046] In this embodiment, if Figures 1 to 4 As shown, a plurality of short-range laser displacement sensors are integrated on the clamping part, thereby providing a reliable positioning and control for the installation position of the paper tray, so that it enters the shooting range of the camera sensor of the visual acquisition device and performs fixed-angle section shooting and recording.

[0047] Further, in some implementations of this embodiment, Figures 1 to 4 As shown, it also includes: a processing center and a barcode sticking device 104. The processing center is connected to the clamping structure and the cut surface detection component 40 for recording and processing the relevant data of the paper tray; the barcode sticking device 104 is used to correspond to the data recorded by the processing center and stick barcodes to the paper tray under the control of the processing center.

[0048] In this embodiment, if Figures 1 to 4 As shown, the processing center is mainly used to compare the data of the cross-section content of the paper tray photographed at a fixed angle, obtain the abnormal points of the cross-section and the wide width of the cut, perform simple data processing and convert them into corresponding quality standards, and convert the corresponding quality standards and tightness into corresponding bar codes, which are then pasted on the corresponding paper tray surface by the code sticker 104 to facilitate subsequent automated sorting.

[0049] Further, in some implementations of this embodiment, Figures 1 to 4 As shown, the clamping part is a first clamping part 301 and a second clamping part 302, and the second clamping part 302 rotates relative to the first clamping part 301, and a driver for driving the clamping part to rotate is correspondingly provided.

[0050] In this embodiment, if Figures 1 to 4 As shown, the second clamping portion 302 and the first clamping portion 301 are connected via a rotating shaft, and the first clamping portion 301 is fixed on the sliding portion 201. A servo drive motor is installed on the rotating shaft to drive the rotation of the rotating shaft, thereby controlling the relative rotation between the first clamping portion 301 and the second clamping portion 302 to facilitate the paper tray to enter the accommodating space 303.

[0051] Based on the above device, this embodiment provides a method for detecting paper trays after cutting, comprising the following steps:

[0052] S1, releasing the connection between the support rod 103 and the fixed cover plate 101, rotating the rotating cover plate 102, and driving the support rod 103 to rotate relative to the support frame 10;

[0053] S2, putting the paper tray on the support rod 103, making the inner wall of the inner core of the paper tray abut against the slider 104 and correspond one to one;

[0054] S3, driving the plurality of second clamping parts 302 to rotate in a direction away from the first clamping part 301, rotating the rotating cover plate 102, moving the support rod 103 and the paper tray between the first clamping part 301 and the second clamping part 302, and fixing the other end of the support rod 103 to the fixed cover plate 101, and completing the installation;

[0055] S4, driving the plurality of second clamping parts 302 to rotate toward the direction close to the first clamping part 301, and driving the pressing block 304 to abut against the peripheral side of the paper tray for the first time;

[0056] S4, driving the sliding part 201 on the variable pitch structure 20 to slide along the axial direction of the support rod 103, driving the slider 104 to carry the paper tray evenly distributed on the support rod 103, and recording the displacement L0 of the displacement sensor and the pressure value P0 of the pressure sensor at this time;

[0057] S5, driving the pressing block 304 to slide along the radial direction of the paper tray, reducing the size of the accommodating space 303. When the pressure value P0 of the guiding pressure sensor is consistent with the calibration value P, the sliding pressing block 304 is stopped, and the displacement L1 at this time is recorded;

[0058] S6, obtaining the positions of the two cut surfaces of the paper tray by means of a laser positioning device, and recording the corresponding paper tray width value D0;

[0059] S7, photographing the section through a visual acquisition system and uploading it to a processing center;

[0060] S8, by comparing the difference between L1 and L0 and the difference between the paper tray width D0 and the process standard width D in the processing center, and comparing and analyzing the comprehensive cross-sectional images, the quality category of the corresponding paper tray is obtained;

[0061] S9, entering the corresponding information into the barcode, and pasting the barcode with the entered information onto the side of the corresponding paper tray by the barcode paster 104, thus completing the detection;

[0062] S10, canceling the fixed connection between the support rod 103 and the fixed cover plate 101, and outputting the detected paper tray.

[0063] In summary, when using an automatic quality inspection device and method for paper disc slitting to inspect paper discs after slitting, the variable pitch structure 20 is set to cooperate with the clamping part installed on the sliding part 201 to evenly distribute the paper discs on the support frame 10, and then the clamping part and the cross-section detection component 40 are used to quickly detect the tightness of the paper disc and the flatness of the cross-section. The pressure value of the pressure sensor is mainly controlled to change from P0 to P value. The difference between L1 and L0 recorded by the displacement sensor is used to judge the tightness by comparing the difference with the standard value; by comparing the width value D0 and the comparison structure after visual acquisition, data is entered and barcodes are pasted by the barcode paster 104, multiple batches of paper discs after slitting can be inspected simultaneously, thereby improving the inspection efficiency.

[0064] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An automatic quality inspection device for paper trays after cutting, characterized in that: include: Support frame (10); A variable pitch structure (20) is installed on the support frame (10) and has a plurality of sliding parts (201), wherein the sliding parts (201) are spaced evenly apart relative to the support frame (10) after the pitch is changed; a clamping structure, mounted on the sliding portion (201), having a clamping portion corresponding to the sliding portion (201), the clamping portion having an adjustable accommodation space (303) for abutting against the circumferential surface of the paper tray to measure the tightness of the paper tray; A cut surface detection component (40) is mounted on the clamping portion and is used to detect and collect the cut surface of the paper roll.

2. The automatic quality inspection device after paper tray cutting according to claim 1 is characterized in that: include: A fixed cover plate (101) mounted on the support frame (10); A rotating cover plate (102) is rotatably mounted on the support frame (10); a support rod (103), one end of which is mounted on the rotating cover plate (102), and the other end of which is detachably mounted on the fixed cover plate (101), the support rod (103) rotating with the rotating cover plate (102) relative to the support frame (10); A plurality of sliders (104) are slidably distributed on the support rod (103) and are used to assist the variable pitch structure (20) in driving the paper roll to slide with respect to the support rod (103) to form a uniform gap.

3. The automatic quality inspection device after paper tray cutting according to claim 2 is characterized in that: The clamping structure comprises: A plurality of pressing blocks (304) are respectively mounted on the clamping portion, and the size of the accommodating space (303) is adjusted by driving the pressing blocks (304) to slide in the radial direction of the paper tray; A displacement sensor, mounted on the clamping portion, and used to record the displacement of the pressing block (304); A pressure sensor is mounted on the pressing block (304) and is used to record and control the pressure applied by the pressing block (304) to the paper roll.

4. The automatic quality inspection device after paper tray cutting according to claim 3 is characterized in that: The section detection component (40) comprises: A laser positioning device, fixed on the clamping portion, for positioning the paper tray; The visual acquisition device is fixed on the clamping portion and is used to record the cutting surface of the paper tray.

5. The automatic quality inspection device after paper tray cutting according to claim 4 is characterized in that: Also includes: a processing center, which is in communication connection with the clamping structure and the cut surface detection component (40), and is used to record and process relevant data of the paper tray; The barcode sticking device (104) is used to stick a barcode on the paper tray corresponding to the data recorded by the processing center and under the control of the processing center.

6. The automatic quality inspection device after paper tray cutting according to claim 5 is characterized in that: The clamping part comprises a first clamping portion (301) and a second clamping portion (302), and the second clamping portion (302) rotates relative to the first clamping portion (301), and a driver for driving the clamping portion to rotate is correspondingly provided.

7. A method for detecting paper trays after cutting, characterized in that: The automatic quality inspection device after paper tray cutting according to claim 6 comprises the following steps: S1, releasing the connection between the support rod (103) and the fixed cover plate (101), rotating the rotating cover plate (102), and driving the support rod (103) to rotate relative to the support frame (10); S2, sleeve the paper tray onto the support rod (103), and make the inner wall of the inner core of the paper tray abut against the slider (104) in a one-to-one correspondence; S3, driving the plurality of second clamping parts (302) to rotate in a direction away from the first clamping part (301), rotating the rotating cover plate (102), moving the support rod (103) and the paper tray between the first clamping part (301) and the second clamping part (302), and fixing the other end of the support rod (103) to the fixed cover plate (101), thereby completing the installation; S4, driving the plurality of second clamping portions (302) to rotate in a direction close to the first clamping portion (301), and driving the pressing block (304) to abut against the peripheral side of the paper tray for the first time; S4, driving the sliding part (201) on the variable pitch structure (20) to slide in a variable pitch direction along the axis direction of the support rod (103), driving the sliding block (104) to carry the paper trays evenly distributed on the support rod (103), and recording the displacement L0 of the displacement sensor and the pressure value P0 of the pressure sensor at this time; S5, driving the pressing block (304) to slide along the radial direction of the paper tray, reducing the size of the accommodating space (303) and guiding the pressure value P0 of the pressure sensor to be consistent with the calibration value P, then stopping the sliding of the pressing block (304), and recording the displacement L1 at this time; S6, obtaining the positions of the two cut surfaces of the paper tray by means of a laser positioning device, and recording the corresponding paper tray width value D0; S7, photographing the section through a visual acquisition system and uploading it to a processing center; S8, by comparing the difference between L1 and L0 and the difference between the paper tray width D0 and the process standard width D in the processing center, and comparing and analyzing the comprehensive cross-sectional images, the quality category of the corresponding paper tray is obtained; S9, entering the corresponding information into the barcode, and pasting the barcode with the entered information onto the side of the corresponding paper tray by the barcode paster (104), thereby completing the detection; S10, cancelling the fixed connection between the support rod (103) and the fixed cover plate (101), and outputting the detected paper tray.

Images