Full-automatic three-dimensional printing and intelligent quality monitoring method for set top box

Abstract

The invention relates to a full-automatic three-dimensional printing and intelligent quality monitoring method for a set top box, which comprises the following steps of: pre-storing each series of three-dimensional data of the set top box in a storage module, designing a printing scheme, collecting the three-dimensional data of the set top box to be printed in real time, performing feature extraction, performing feature comparison, arranging the three-dimensional data in a three-dimensional printing unit, and printing. The printed set-top box is transmitted to a monitoring unit box for quality monitoring, if the printing quality meets the preset requirement, the set-top box is transmitted to a full-automatic packaging unit for packaging, otherwise, the set-top box is transmitted to an automatic erasing unit for automatic erasing processing, and after the erasing quality meets the requirement, analysis is performed according to the printing quality monitoring result of the set-top box; according to the method, the set top box is automatically erased, the implemented three-dimensional printing scheme is adjusted according to the printing quality monitoring result, and the set top box subjected to automatic erasing processing is printed again based on the adjusted three-dimensional printing scheme, so that the production cost is effectively reduced, the labor is reduced, and the production efficiency and the product quality stability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of set-top box printing and intelligent quality monitoring, and particularly relates to a full-automatic three-dimensional printing and intelligent quality monitoring method for set-top boxes. Background Art

[0002] With the rapid development of information technology, set-top boxes have emerged. A set-top box is a device that transmits TV content through Internet protocols, allowing users to access and watch TV programs through the Internet instead of relying on traditional broadcast or satellite signals. The set-top box is specifically designed to receive and decode video streams transmitted through the Internet. It usually establishes a connection with the service provider's server, receives and decodes data through a router with a high-speed Internet connection, and then transmits it to the TV for playback. Since it provides a rich variety of TV channels and on-demand programs, users can watch, pause, fast forward, and rewind as needed. Due to the direct connection to the service provider's server, it usually provides a more stable and high-quality video stream. In addition, the set-top box also supports interactive functions, which has led to the rapid popularization of set-top boxes.

[0003] Three-dimensional printing of set-top boxes refers to the 3D stereoscopic effect printing achieved through stereoscopic grating technology. This technology utilizes the refraction principle of stereoscopic gratings to present different patterns at different angles, thus creating a three-dimensional stereoscopic effect. Specifically, 3D stereoscopic printing uses stereoscopic grating vision software to convert different patterns into stereoscopic grating line numbers, and then utilizes the refraction principle of stereoscopic gratings to present different patterns at different angles. Since different specifications of stereoscopic gratings will have different refraction effects and refraction angles, and the viewing distance will also vary, when performing three-dimensional printing of set-top boxes, it is necessary to design according to their different shapes and sizes in combination with the characteristics of stereoscopic gratings, making it impossible to achieve full-automatic production for three-dimensional printing of set-top boxes, and the cost of three-dimensional printing of set-top boxes is high and the design is complex.

[0004] Therefore, developing full-automatic three-dimensional printing of set-top boxes and conducting quality monitoring of set-top boxes, reducing production costs, reducing labor, improving production efficiency, and ensuring product quality stability are technical problems that urgently need to be solved at present. Summary of the Invention

[0005] The purpose of the present invention is to provide a full-automatic three-dimensional printing and intelligent quality monitoring method for set-top boxes, for the development of full-automatic three-dimensional printing of set-top boxes and the conduct of quality monitoring of set-top boxes, reducing production costs, reducing labor, improving production efficiency, and ensuring product quality stability.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] A full-automatic three-dimensional printing and intelligent quality monitoring method for set-top boxes, comprising the following steps:

[0008] S1: Pre-store the three-dimensional data of each series of set-top boxes in the storage module. Divide the set-top boxes to be printed into multiple series according to their shape and size, and design corresponding three-dimensional stereoscopic printing schemes according to the three-dimensional data of each series of set-top boxes.

[0009] S2: Real-time collect the three-dimensional data of the set-top box to be printed, extract the features of the three-dimensional data of the set-top box to be printed, and call the pre-stored three-dimensional data of each series of the set-top box.

[0010] S3: Compare the extracted three-dimensional features of the set-top box to be printed with the pre-stored three-dimensional data of each series of set-top boxes. If a match can be found in the comparison of the pre-stored three-dimensional data of each series of set-top boxes, then execute step S3. Otherwise, automatically design a three-dimensional stereoscopic printing scheme according to the extracted three-dimensional features of the set-top box to be printed and then execute step S3.

[0011] S3: Arrange the box bodies of the set-top boxes to be printed neatly on the three-dimensional printing unit in the specified direction, place them at the position of the automatic loading machine, start the equipment and self-check whether the direction is correct. If correct, the automatic feeding machine will send the product to the next process. If incorrect, it will be transferred to the unqualified area on the assembly line for rework.

[0012] S4: Call the three-dimensional stereoscopic printing scheme that matches the pre-stored three-dimensional data of each series of set-top boxes or the automatically designed three-dimensional stereoscopic printing scheme and implement it on the set-top box to be printed through the three-dimensional printing unit.

[0013] S5: Transmit the printed set-top box to the monitoring unit. The monitoring unit monitors the quality of the printed set-top box and judges whether the printing quality of the set-top box meets the preset requirements according to the quality monitoring results. If so, transmit the printed set-top box to the full-automatic packaging unit for packaging. If not, execute step S6.

[0014] S6: Transmit the printed set-top box that does not meet the preset requirements to the automatic erasing unit for automatic erasing processing, and transmit the set-top box after automatic erasing processing to the self-check unit to monitor the erasing quality of the set-top box and judge whether the erasing quality meets the requirements. If so, execute step S7. Otherwise, return to the automatic erasing unit for automatic erasing processing again.

[0015] S7: Analyze according to the printing quality monitoring results of the set-top box, adjust the implemented three-dimensional stereoscopic printing scheme according to the printing quality monitoring results, and re-print the set-top box after automatic erasing processing based on the adjusted three-dimensional stereoscopic printing scheme.

[0016] S8: Repeat steps S5 - S7 until the printing quality monitoring results meet the preset requirements.

[0017] Preferably, the three-dimensional printing scheme designed in step S1 includes the content of the printed characters, font, character model, printing position on the set-top box, typesetting, printing direction, and sequence.

[0018] Preferably, the specific process of feature extraction for the three-dimensional data of the set-top box to be printed in step S2 is as follows:

[0019] S21: Remove the noise data in the three-dimensional data of the set-top box to be printed, and identify the image distortion in the three-dimensional data. If image distortion is identified in the three-dimensional data, process the image distortion therein;

[0020] S22: Perform specified feature extraction on the three-dimensional data of the set-top box to be printed after image distortion processing, calculate the average value of each extracted feature, and divide the difference between the average value of each feature and the eigenvalue of the corresponding feature point by the standard deviation;

[0021] S23: Calculate the covariance matrix of the three-dimensional data and the eigenvectors corresponding to the covariance matrix according to the correlation between the extracted specified features, select the eigenvectors corresponding to the first specified eigenvalues, and project the three-dimensional data of the set-top box to be printed with noise data removed in step S21 onto the selected eigenvectors corresponding to the specified eigenvalues.

[0022] Preferably, the specific process of calling the three-dimensional printing scheme matching the three-dimensional data of each series of pre-stored set-top boxes or the automatically designed three-dimensional printing scheme in step S5 and implementing it on the set-top box to be printed is as follows:

[0023] S51: Print the set-top box according to the content of the printed characters, font, character model, printing position, typesetting, printing direction, and sequence in the designed three-dimensional printing scheme;

[0024] S52: Transmit the printed set-top box to the drying unit. The drying unit automatically sets the corresponding parameters of the moving speed and drying temperature of the drying unit for the set-top box according to the printing position, printing content, and area, and then performs drying treatment;

[0025] S53: Monitor the drying quality of the set-top box after drying treatment by the drying unit, determine whether the drying quality meets the preset requirements. If so, execute step S6; if not, return to the drying unit for drying treatment again until the drying quality meets the preset requirements and then execute step S6.

[0026] Preferably, when printing the set-top box in accordance with the content, font, type, printing position, layout, printing direction and sequence of the printed characters in the designed three-dimensional printing scheme in step S51, the printing operation is simultaneously performed on the specified four required surfaces of the set-top box; while performing the printing operation on the printing items of each required surface, the printing quality is monitored, and for unqualified items, automatic identification is performed and the printing operation is re-performed, without affecting other surfaces or points that already meet the requirements.

[0027] Preferably, when the monitoring unit monitors the quality of the printed set-top box in step S6, it judges whether the printing quality of the set-top box meets the preset requirements according to the quality monitoring results, and when the printing quality of the set-top box does not meet the corresponding printing quality requirements, the relevant data that does not meet the corresponding printing quality requirements is fed back to the automatic erasing unit and the three-dimensional printing unit, the corresponding position is erased by the automatic erasing unit, and the relevant parameters of the three-dimensional printing unit are adjusted.

[0028] Preferably, after the three-dimensional printing process is completed in step S9 and the printing quality meets the preset requirements, the qualified set-top boxes are transferred to the full-automatic packaging unit. The full-automatic packaging unit automatically applies a film to the printed part of the product. After the film application is completed, each set-top box product is packaged using the corresponding packaging bag, and the packaged set-top box products are stored in the material box in the specified order for standby or transfer.

[0029] The beneficial effects of the present invention include:

[0030] The full-automatic three-dimensional printing and intelligent quality monitoring method for the set-top box provided by the present invention pre-stores the three-dimensional data of each series of the set-top box in the storage module and designs the printing scheme. After the three-dimensional data of the set-top box to be printed is collected in real time, feature extraction is performed, then feature comparison is performed, and then it is arranged in the three-dimensional printing unit for printing. The printed set-top box is transferred to the monitoring unit for quality monitoring. If the printing quality meets the preset requirements, it is transferred to the full-automatic packaging unit for packaging. Otherwise, it is transferred to the automatic erasing unit for automatic erasing treatment. After the erasing quality meets the requirements, analysis is performed according to the printing quality monitoring results of the set-top box, and the implemented three-dimensional printing scheme is adjusted according to the printing quality monitoring results, and the set-top box after the automatic erasing treatment is printed again based on the adjusted three-dimensional printing scheme, effectively reducing the production cost, reducing the labor, and improving the production efficiency and product quality stability.

[0031] First, divide the set-top boxes to be printed into multiple series according to their shape and size. Preset a three-dimensional printing scheme in the three-dimensional printing unit for each series, including the content of the printed words, font, type of the words, printing position on the set-top box, typesetting, printing direction, and order. Before printing, match the series of set-top boxes to be printed. If a match is found, directly call the corresponding printing scheme for printing. Otherwise, automatically design a printing scheme for printing. This process can effectively improve the printing efficiency and reduce the manual labor at the same time.

[0032] Secondly, remove the noise data in the three-dimensional data of the set-top boxes to be printed, and identify whether there is image distortion. If there is, perform image distortion processing and then extract the specified features. Calculate the covariance matrix of the three-dimensional data and the eigenvectors corresponding to the covariance matrix according to the correlation between the extracted specified features. Select the eigenvectors corresponding to the first specified eigenvalues, and project the three-dimensional data onto the eigenvectors of the selected specified eigenvalues, realizing the rapid and accurate extraction of the specified features in the three-dimensional data, providing an accurate data basis for subsequent feature comparison.

[0033] Thirdly, perform printing according to the designed printing scheme. After printing, the set-top boxes are transferred to the drying unit, and the drying unit performs drying treatment after setting the corresponding parameters; monitor the drying quality after the drying treatment of the drying unit to ensure good drying quality, that is, monitor each link of the printing to ensure good processing quality for each link, and the whole process does not require manual participation, greatly reducing the manual labor and significantly reducing the cost.

[0034] Finally, using the intelligent monitoring system has changed the method of manual visual inspection, improving the efficiency and accuracy of product quality; adopting the automatic film pasting method to ensure the product from being worn during transportation and turnover, reducing the number of unqualified appearances; adopting the automatic placement of the product on the printing machine to position the placement direction and specific position, improving the printing position accuracy of the product; also providing a strong guarantee for the continuous improvement of the enterprise and the high-quality experience of consumers. Brief Description of the Drawings

[0035] Figure 1 It is a schematic flow chart of the full-automatic three-dimensional printing and intelligent quality monitoring method for the set-top box of the present invention.

[0036] Figure 2 It is a schematic flow chart of the feature extraction for the three-dimensional data of the set-top box to be printed of the present invention. Detailed Embodiments

[0037] The following will further elaborate on the present invention in conjunction with the attached Figures 1 to 2 Make a further detailed description of the present invention:

[0038] Embodiment 1

[0039] See attached Figure 1 As shown, the set-top box fully automatic three-dimensional printing and intelligent quality monitoring method includes the following steps:

[0040] S1: Pre-store the three-dimensional data of each series of set-top boxes in the storage module, divide them into multiple series according to the shape and size of the set-top boxes to be printed, and design corresponding three-dimensional printing solutions according to the three-dimensional data matching of each series of set-top boxes. Divide the set-top boxes to be printed into multiple series according to their shape and size, and pre-design the three-dimensional printing solutions including the content, font, type of the words to be printed, the position of printing on the set-top boxes, typesetting, printing direction and sequence in the three-dimensional printing unit according to the series. Then, match the series of set-top boxes to be printed before printing. If matched, directly call the corresponding printing solution for printing. If not, then automatically design the printing solution for printing. This process can effectively improve printing efficiency and reduce labor.

[0041] S2: Collect the three-dimensional data of the set-top box to be printed in real time, extract features of the three-dimensional data of the set-top box to be printed, that is, obtain the three-dimensional features of the set-top box to be printed, prepare for the subsequent determination of the series to which it belongs, and call the pre-stored three-dimensional data of each series of the set-top box.

[0042] S3: performing feature comparison between the extracted three-dimensional features of the set-top box to be printed and the pre-stored three-dimensional data of each series of set-top boxes. If the features are in the pre-stored three-dimensional data of each series of set-top boxes, then executing step S3; otherwise, automatically designing a three-dimensional printing scheme according to the extracted three-dimensional features of the set-top box to be printed and then executing step S3;

[0043] S3: Arrange the set-top boxes to be printed neatly on the three-dimensional printing unit in the specified direction, store them in the automatic feeder position, start the equipment and perform self-check to see if the direction is correct. If it is correct, the automatic feeder will send the product to the next process. If it is wrong, it will be transferred to the unqualified area on the assembly line for rework;

[0044] S4: calling a 3D printing scheme matching the pre-stored 3D data of each series of set-top boxes or an automatically designed 3D printing scheme and implementing it on the set-top box to be printed through a 3D printing unit;

[0045] S5: The printed set-top box is transmitted to the monitoring unit, and the monitoring unit performs quality monitoring on the printed set-top box, and determines whether the printing quality of the set-top box meets the preset requirements according to the quality monitoring result. If yes, the printed set-top box is transmitted to the full-automatic packaging unit for packaging. If no, step S6 is executed;

[0046] S6: Transfer the printed set-top boxes that do not meet the preset requirements to the automatic erasure unit for automatic erasure processing, and transfer the set-top boxes after the automatic erasure processing to the self-check unit to monitor the erasure quality of the set-top boxes, and determine whether the erasure quality meets the requirements. If so, execute step S7; otherwise, return to the automatic erasure unit for automatic erasure processing again.

[0047] S7: Analyze according to the printing quality monitoring results of the set-top boxes, adjust the implemented three-dimensional printing scheme according to the printing quality monitoring results, and perform re-printing on the set-top boxes after the automatic erasure processing based on the adjusted three-dimensional printing scheme.

[0048] S8: Repeat steps S5 - S7 until the printing quality monitoring results meet the preset requirements.

[0049] In the prior art, when printing set-top boxes, it is necessary to design the printing scheme in advance before printing. After the design, various verifications will be carried out. After the verification meets the requirements, printing will be carried out according to the printing scheme. In this application, the three-dimensional data of each series of set-top boxes are pre-stored in the storage module and the printing scheme is designed. After the three-dimensional data of the set-top boxes to be printed are collected in real time, feature extraction is carried out, then feature comparison is carried out, and they are arranged in the three-dimensional printing unit for printing. The printed set-top boxes are transferred to the monitoring unit for quality monitoring. If the printing quality meets the preset requirements, they are transferred to the fully automatic packaging unit for packaging; otherwise, they are transferred to the automatic erasure unit for automatic erasure processing. After the erasure quality meets the requirements, analyze according to the printing quality monitoring results of the set-top boxes, adjust the implemented three-dimensional printing scheme according to the printing quality monitoring results, and perform re-printing on the set-top boxes after the automatic erasure processing based on the adjusted three-dimensional printing scheme, effectively reducing the production cost, reducing the labor, and improving the production efficiency and the product quality stability. The three-dimensional printing scheme designed in step S1 includes the content of the printed words, the font, the type of the words, the printing position on the set-top box, the layout, the printing direction and the order.

[0050] In another implementation of this embodiment, the injection-molded set-top boxes are neatly arranged in the printing fixture according to the direction, stored at the position of the automatic feeding machine. After startup, the device self-checks whether the direction is incorrect. After passing the check, the automatic feeder sends the products to the next process. Enter the content to be printed and save it in the three-dimensional printing device. This product requires printing in three directions, and this device can perform the multi-sided printing function simultaneously. After printing, it enters the drying area on the production line. The temperature of the equipment in this area is set, and the transportation speed on the line is adjusted to determine the length of the baking time. Ensure that the products have sufficient drying time without printing or wet phenomena. After drying, it enters the monitoring and supervision area. First, set product information, specifications, printing colors, font sizes, size requirements, position requirements, etc. in the full-automatic intelligent quality monitoring system. Save the relevant information according to different product types for convenient retrieval of parameters in the later stage. The full-automatic intelligent quality monitoring system checks according to the information entered, automatically imports the monitoring information, and transfers the qualified products to the next process. The unqualified information is automatically transferred to the automatic erasing and repairing equipment. Record the information of each qualified product for future reference. When unqualified, the unqualified information is automatically transmitted to the automatic erasing and repairing equipment. According to the received unqualified product information, erase and clean the corresponding surface or point to be scrubbed, and complete the self-check of the erased part. Transmit the products to be reworked to step two and call the rework function. Re-print the unqualified items according to the unqualified information transmitted by the full-automatic intelligent quality monitoring system, forming a closed loop from the printing process to the inspection process. The qualified products enter the full-automatic packaging device. First, automatically apply a film to the printed part of the product to protect it from collision and friction. Then, package each product individually with a packaging bag. The products with packaged bags are stored in the material box in sequence for standby and transfer of processes.

[0051] Embodiment 2

[0052] Based on Embodiment 1, refer to Figure 2 , the specific process of feature extraction for the three-dimensional data of the set-top box to be printed in step S2 is as follows:

[0053] S21: Remove the noise data in the three-dimensional data of the set-top box to be printed. The noise data includes invalid data, duplicate data, and abnormal data. Removing the noise data can effectively avoid the influence of noise data on subsequent feature extraction. Identify the image distortion in the three-dimensional data. If image distortion is identified in the three-dimensional data, process the image distortion. Since image distortion will affect subsequent feature extraction and feature comparison results, it is necessary to process the image distortion part to ensure the accuracy of subsequent feature extraction results and feature comparison results;

[0054] S22: Extract specified features from the three-dimensional data of the set-top box to be printed after image distortion processing, calculate the average value of each extracted feature, divide the result obtained by subtracting the feature value of the corresponding feature point from the average value of each feature by the standard deviation;

[0055] S23: Calculate the covariance matrix of the three-dimensional data and the eigenvectors corresponding to the covariance matrix according to the correlation between the extracted specified features, select the eigenvectors corresponding to the first specified eigenvalues, and project the three-dimensional data of the set-top box with noise data removed in step S21 onto the eigenvectors corresponding to the selected specified eigenvalues.

[0056] In this embodiment, the specific process of processing the image distortion is as follows:

[0057] Based on the standard image, establish a standard coordinate system, convert the pixel coordinates to the standard coordinate system, calculate the image distortion amount and the image distortion position of the image with image distortion in the standard coordinate system, convert the standard coordinate system to the pixel coordinate system, and obtain the relationship between the pixel position before distortion and the pixel position after distortion. Through an iterative method, obtain the pixel position after distortion from the distorted pixel position, and calculate the values between the points around the distorted pixel position by linear interpolation. Sequentially establish a floating-point pixel position mapping diagram of the distorted pixel, find the corresponding position of the pixel position in the standard coordinate system based on the mapping diagram, and perform interpolation to obtain the undistorted image.

[0058] Embodiment 3

[0059] On the basis of Embodiment 1 or Embodiment 2, the specific process of calling the three-dimensional stereoscopic printing scheme or the automatically designed three-dimensional stereoscopic printing scheme that matches the three-dimensional data of each series of set-top boxes stored in advance in step S5 and implementing it on the set-top box to be printed is as follows:

[0060] S51: Print the set-top box according to the content, font, type, printing position, layout, printing direction and order of the printed characters in the designed three-dimensional stereoscopic printing scheme;

[0061] S52: Transmit the printed set-top box to the drying unit. The drying unit automatically sets the corresponding parameters of the moving speed and drying temperature of the drying unit for the set-top box according to the printing position, printing content and area, and then performs the drying process;

[0062] S53: Monitor the drying quality of the set-top box after the drying process by the drying unit, judge whether the drying quality meets the preset requirements. If so, execute step S6; if not, return the set-top box to the drying unit for drying again until the drying quality meets the preset requirements and then execute step S6.

[0063] In this embodiment, when printing the set-top box according to the content, font, type, printing position, layout, printing direction and sequence of the printed characters in the designed three-dimensional printing scheme in step S51, the printing operation is simultaneously performed on four specified required surfaces of the set-top box; while performing the printing operation on the printing items of each required surface, the printing quality is monitored, and for unqualified items, automatic identification is performed and the printing operation is re-performed, without affecting other surfaces or points that already meet the requirements.

[0064] When the monitoring unit monitors the quality of the printed set-top box in step S6, it determines whether the printing quality of the set-top box meets the preset requirements according to the quality monitoring results, and when the printing quality of the set-top box does not meet the corresponding printing quality requirements, it feeds back the relevant data that does not meet the corresponding printing quality requirements to the automatic erasing unit and the three-dimensional printing unit, performs erasing processing on the corresponding position through the automatic erasing unit, and adjusts the relevant parameters of the three-dimensional printing unit.

[0065] After the qualified set-top box after the three-dimensional printing process in step S9 is completed and the printing quality meets the preset requirements, it is transferred to the full-automatic packaging unit. The full-automatic packaging unit automatically applies a film to the printed part of the product. After the film application is completed, each set-top box product is packaged using the corresponding packaging bag, and the packaged set-top box products are stored in the material box in the specified order for standby or transfer.

[0066] In summary, for the full-automatic three-dimensional printing and intelligent quality monitoring method of the set-top box provided by the present invention, the three-dimensional data of each series of the set-top box are pre-stored in the storage module and the printing scheme is designed. After the three-dimensional data of the set-top box to be printed are collected in real time, feature extraction is performed, then feature comparison is carried out, and they are arranged in the three-dimensional printing unit for printing. The printed set-top box is transferred to the monitoring unit for quality monitoring. If the printing quality meets the preset requirements, it is transferred to the full-automatic packaging unit for packaging. Otherwise, it is transferred to the automatic erasing unit for automatic erasing processing. After the erasing quality meets the requirements, analysis is performed according to the printing quality monitoring results of the set-top box, and the implemented three-dimensional printing scheme is adjusted according to the printing quality monitoring results. Based on the adjusted three-dimensional printing scheme, the set-top box after the automatic erasing processing is printed again, effectively reducing the production cost, reducing the labor, and improving the production efficiency and product quality stability.

[0067] The set-top boxes to be printed are divided into multiple series according to their shape and size. For each series, a three-dimensional printing plan is pre-designed in the three-dimensional printing unit, including the content of the printed words, font, type of the words, printing position on the set-top box, typesetting, printing direction and sequence. Before printing, the series of the set-top boxes to be printed are matched. If a match is found, the corresponding printing plan is directly called for printing. Otherwise, a printing plan is automatically designed for printing. This process can effectively improve the printing efficiency and reduce the manual workload. By removing the noise data in the three-dimensional data of the set-top boxes to be printed and identifying whether there is image distortion, if there is, image distortion processing is carried out and then specified feature extraction is performed. According to the correlation between the extracted specified features, the covariance matrix of the three-dimensional data and the eigenvectors corresponding to the covariance matrix are calculated. The eigenvectors corresponding to the first specified eigenvalues are selected, and the three-dimensional data is projected onto the eigenvectors of the selected specified eigenvalues, realizing the rapid and accurate extraction of the specified features in the three-dimensional data and providing an accurate data basis for subsequent feature comparison.

[0068] By printing according to the designed printing plan, the printed set-top boxes are conveyed to the drying unit, and the drying unit performs drying treatment after setting the corresponding parameters; the drying quality after the drying treatment of the drying unit is monitored to ensure good drying quality, that is, each link of the printing is monitored to ensure good processing quality of each link, and there is no need for manual participation throughout the process, greatly reducing the manual workload and significantly reducing the cost. Using an intelligent monitoring system changes the method of manual visual inspection, improving the efficiency and accuracy of product quality; adopting an automatic film pasting method ensures the product from being worn during transportation and turnover, reducing the number of unqualified appearances; adopting an automatic placement of the product on the printing machine, positioning the placement direction and specific position, improving the printing position accuracy of the product; it also provides a strong guarantee for the continuous improvement of the enterprise and the high-quality experience of consumers.

Claims

1. A fully automatic three-dimensional printing and intelligent quality monitoring method for a set-top box, characterized in that, Including the following steps: S1: Pre-store the 3D data of each series of set-top boxes in the storage module. Divide the set-top boxes to be printed into multiple series according to their shape and size, and match and design corresponding 3D stereoscopic printing schemes based on the 3D data of each series of set-top boxes; S2: Real-time collect the 3D data of the set-top box to be printed, extract the features of the 3D data of the set-top box to be printed, and call the pre-stored 3D data of each series of the set-top box; S3: Compare the extracted 3D features of the set-top box to be printed with the pre-stored 3D data of each series of set-top boxes. If a match can be found in the pre-stored 3D data of each series of set-top boxes, then execute step S3. Otherwise, automatically design a 3D stereoscopic printing scheme based on the extracted 3D features of the set-top box to be printed and then execute step S3; S4: Arrange the set-top boxes to be printed neatly on the 3D printing unit in a specified direction, place them at the position of the automatic loading machine, start the equipment and self-check whether the direction is incorrect. If correct, the automatic feeder will send the product to the next process. If incorrect, transfer it to the unqualified area on the production line for rework; S5: Call the 3D stereoscopic printing scheme that matches the pre-stored 3D data of each series of set-top boxes or the automatically designed 3D stereoscopic printing scheme and implement it on the set-top box to be printed through the 3D printing unit; S6: Transmit the printed set-top box to the monitoring unit. The monitoring unit monitors the quality of the printed set-top box and judges whether the printing quality of the set-top box meets the preset requirements according to the quality monitoring results. If so, transmit the printed set-top box to the fully automatic packaging unit for packaging. If not, execute step S6; S7: Transmit the printed set-top box that does not meet the preset requirements to the automatic erasing unit for automatic erasing processing, and transmit the set-top box after automatic erasing processing to the self-checking unit to monitor the erasing quality of the set-top box and judge whether the erasing quality meets the requirements. If so, execute step S7. Otherwise, return to the automatic erasing unit for automatic erasing processing again; S8: Analyze according to the printing quality monitoring results of the set-top box, adjust the implemented 3D stereoscopic printing scheme according to the printing quality monitoring results, and re-print the set-top box after automatic erasing processing based on the adjusted 3D stereoscopic printing scheme; S9: Repeat steps S5 - S8 until the printing quality monitoring results meet the preset requirements.

2. The full-automatic three-dimensional printing and intelligent quality monitoring method for a set-top box according to claim 1, wherein The 3D stereoscopic printing scheme designed in step S1 includes the content, font, type of the printed words, the printing position on the set-top box, layout, printing direction and sequence.

3. The full-automatic three-dimensional printing and intelligent quality monitoring method for a set-top box according to claim 1, wherein, The specific process of extracting the features of the 3D data of the set-top box to be printed in step S2 is as follows: S21: Remove the noise data in the 3D data of the set-top box to be printed, and identify the image distortion in the 3D data. If image distortion in the 3D data is identified, process the image distortion therein; S22: Extract specified features from the 3D data of the set-top box to be printed after image distortion processing, calculate the average value of each extracted feature, and divide the difference between the average value of each feature and the feature value of the corresponding feature point by the standard deviation; S23: Calculate the covariance matrix of the three-dimensional data and the corresponding eigenvectors based on the correlation between the extracted specified features, select the eigenvectors corresponding to the first specified eigenvalues, and project the three-dimensional data of the set-top box to be printed with noise data removed in step S21 onto the eigenvectors corresponding to the selected specified eigenvalues.

4. The full-automatic three-dimensional printing and intelligent quality monitoring method for a set-top box according to claim 2, characterized in that The specific process of calling the three-dimensional stereoscopic printing scheme that matches the three-dimensional data of each series of pre-stored set-top boxes or the automatically designed three-dimensional stereoscopic printing scheme in step S5 and implementing it on the set-top box to be printed is as follows: S51: Print the set-top box according to the content, font, typeface, printing position, layout, printing direction, and order of the printed characters in the designed three-dimensional stereoscopic printing scheme; S52: Transfer the printed set-top box to the drying unit. The drying unit automatically sets the corresponding parameters of the moving speed and drying temperature of the drying unit for the set-top box according to the printing position, printing content, and area, and then performs the drying process; S53: Monitor the drying quality of the set-top box after the drying process by the drying unit, determine whether the drying quality meets the preset requirements. If so, execute step S6; if not, return to the drying unit for drying again until the drying quality meets the preset requirements and then execute step S6.

5. The full-automatic three-dimensional printing and intelligent quality monitoring method for a set-top box according to claim 4, characterized in that, When printing the set-top box according to the content, font, typeface, printing position, layout, printing direction, and order of the printed characters in the designed three-dimensional stereoscopic printing scheme in step S51, perform printing operations on the specified four required surfaces of the set-top box at the same time; monitor the printing quality while performing printing operations on the printing items of each required surface, automatically identify the unqualified items and re-perform the printing operations, without affecting other surfaces or points that have met the requirements.

6. The full-automatic three-dimensional printing and intelligent quality monitoring method for a set-top box according to claim 5, characterized in that, When the monitoring unit monitors the printed set-top box in step S6, judge whether the printing quality of the set-top box meets the preset requirements according to the quality monitoring results, and when the printing quality of the set-top box does not meet the corresponding printing quality requirements, feedback the relevant data that does not meet the corresponding printing quality requirements to the automatic erasing unit and the three-dimensional printing unit, perform erasing processing on the corresponding position by the automatic erasing unit, and adjust the relevant parameters of the three-dimensional printing unit.

7. The full-automatic three-dimensional printing and intelligent quality monitoring method for a set-top box according to claim 1, wherein After the qualified set-top box after completing the three-dimensional printing process and the printing quality meeting the preset requirements in step S9 is transferred to the full-automatic packaging unit. The full-automatic packaging unit automatically applies a film to the printed part of the product. After the film application is completed, use the corresponding packaging bag to package each single set-top box product, and store the packaged set-top box products in the material box in the specified order for standby or transfer.

Images