Electronic cigarette appearance mixed color identification system

Abstract

The present invention relates to an electronic cigarette appearance mixed color identification system, comprising: an appearance acquisition device, which is arranged opposite to the appearance to be detected area of ​​the electronic cigarette, and is used to perform an imaging action on the appearance to be detected area; a last-layer grabbing mechanism, which is used to determine that there is mixed color in the entity of the appearance to be detected area when the standard deviation of the reference color channel values ​​corresponding to each pixel row occupied by the appearance to be detected area in the targeted optimized image is greater than or equal to the set standard deviation limit. The electronic cigarette appearance mixed color identification system of the present invention is compact in design and intelligent in operation. Since it is possible to perform targeted visual data acquisition and customized analysis of the degree of mixed color on the mouthpiece part or the cigarette rod part of the electronic cigarette to determine whether there is a mixed color scene in the mouthpiece part or the cigarette rod part of the electronic cigarette, the refined implementation of the appearance quality inspection of the electronic cigarette is completed, and electronic cigarette products with serious appearance mixed color are prevented from entering the market.

Description

Technical Field

[0001] The present invention relates to the field of electronic cigarette quality inspection, and in particular to an electronic cigarette appearance mixed color identification system. Background Art

[0002] Electronic cigarettes are a non-combustion alternative to tobacco products. They are similar to some characteristics of ordinary cigarettes, and can refresh smokers and satisfy their pleasure and the habits they have developed over the years. However, electronic cigarettes are fundamentally different from ordinary cigarettes. Electronic cigarettes do not burn, do not contain tar, and do not contain more than 460 chemical substances that cause respiratory and cardiovascular diseases when ordinary cigarettes are burned, thereby removing the carcinogens in ordinary cigarettes. They will not cause harm to others from secondhand smoke or pollute the environment. When users inhale nicotine mist, they feel the same pleasure as smoking traditional cigarettes. It fully simulates the entire process of smoking from a psychological and physiological perspective, creating an environmentally friendly and humane smoking culture.

[0003] With the increase in the number of people using e-cigarettes, people's quality requirements for e-cigarettes are not limited to the working performance of e-cigarettes, but also put forward more and higher requirements on the appearance of e-cigarettes. The use of e-cigarettes in public places represents the taste and vision of the users. Therefore, these people have put forward more stringent requirements on the appearance of e-cigarettes, including the mouthpiece area or the cigarette rod area of ​​the e-cigarette. For example, the color mixing level representing the degree of color mixing of these areas must be reduced to below a certain level to obtain e-cigarette products with higher appearance quality. Summary of the invention

[0004] In order to solve the technical problems in related fields, the present invention provides an electronic cigarette appearance color mixing identification system, which can perform targeted visual data collection and customized color mixing degree analysis on the mouthpiece area or the cigarette rod area of ​​the electronic cigarette to determine whether there is a color mixing scene in the mouthpiece area or the cigarette rod area of ​​the electronic cigarette, thereby completing the refined implementation of electronic cigarette appearance quality inspection.

[0005] According to the present invention, a system for identifying mixed color appearance of electronic cigarettes is provided, the system comprising:

[0006] An appearance acquisition device is arranged opposite to the appearance detection area of ​​the electronic cigarette, and is used to perform an imaging operation on the appearance detection area to obtain and output a corresponding area acquisition image, wherein the appearance detection area of ​​the electronic cigarette includes a mouthpiece portion or a cigarette rod portion of the electronic cigarette;

[0007] A targeted optimization device, connected to the appearance acquisition device, for successively performing band-stop filtering, histogram equalization, and Kirsch operator-based image content sharpening processing on the received regional acquisition image, so as to obtain and output a corresponding targeted optimization image;

[0008] The first-layer grabbing mechanism is connected to the targeted optimization device and is used to receive the targeted optimization image, detect each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, and for each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, obtain each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on the pixel row;

[0009] A secondary layer grabbing mechanism is connected to the primary layer grabbing mechanism and is used to calculate the average of each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on each pixel row in the targeted optimized image, so as to obtain a reference color channel value corresponding to the pixel row;

[0010] The last-layer grabbing mechanism is connected to the second-layer grabbing mechanism, and is used to judge that there is color mixing in the entity of the appearance to be detected area when the standard deviation of the reference color channel values ​​corresponding to each pixel row occupied by the appearance to be detected area in the targeted optimized image is greater than or equal to the set standard deviation limit; otherwise, it is judged that there is no color mixing in the entity of the appearance to be detected area;

[0011] Among them, the targeted optimization device is connected to the appearance acquisition device, and is used to successively perform band-stop filtering processing, histogram equalization processing and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimization image, including: the targeted optimization device includes a filtering processing unit, an enhancement processing unit and a sharpening processing unit, the enhancement processing unit is respectively connected to the filtering processing unit and the sharpening processing unit, and the filtering processing unit is connected to the appearance acquisition device.

[0012] It can be seen that the present invention has at least the following significant substantive features:

[0013] First: detect each pixel row occupied by the appearance area to be detected in the targeted optimized image, and for each pixel row occupied by the appearance area to be detected in the targeted optimized image, obtain each color channel value corresponding to each pixel point covered by the appearance area to be detected on the pixel row, and for each pixel row occupied by the appearance area to be detected in the targeted optimized image, average the each color channel value corresponding to each pixel point covered by the appearance area to be detected on the pixel row to obtain the reference color channel value corresponding to the pixel row;

[0014] Secondly: when the standard deviation of the reference color channel values ​​corresponding to each pixel row occupied by the appearance inspection area in the targeted optimized image is greater than or equal to the set standard deviation limit, it is determined that the entity in the appearance inspection area has mixed colors; otherwise, it is determined that the entity in the appearance inspection area has no mixed colors;

[0015] Again: Before performing mixed color detection on the appearance area to be inspected, the imaging image of the appearance area to be inspected is subjected to targeted optimization processing such as band-stop filtering, histogram equalization, and image content sharpening based on the Kirsch operator in succession to obtain a corresponding targeted optimized image with higher image quality, thereby ensuring the reliability and effectiveness of subsequent mixed color detection.

[0016] The electronic cigarette appearance mixed color identification system of the present invention is compact in design and intelligent in operation. Since it is capable of performing targeted visual data collection and customized color mixing degree analysis on the mouthpiece area or the cigarette rod area of ​​the electronic cigarette, it is possible to determine whether there is a color mixing scene in the mouthpiece area or the cigarette rod area of ​​the electronic cigarette, thereby completing the refined implementation of the electronic cigarette appearance quality inspection and preventing electronic cigarette products with serious color mixing from entering the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The embodiments of the present invention will be described below with reference to the accompanying drawings, wherein:

[0018] Figure 1 1 is a diagram showing the internal structure of an electronic cigarette appearance mixed color identification system according to a first embodiment of the present invention.

[0019] Figure 2 1 is a diagram showing the internal structure of an electronic cigarette appearance mixed color identification system according to a second embodiment of the present invention.

[0020] Figure 3 1 is a diagram showing the internal structure of an electronic cigarette appearance mixed color identification system according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0021] The implementation scheme of the electronic cigarette appearance mixed color identification system of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Figure 1 This is an internal structure diagram of an electronic cigarette appearance mixed color identification system according to a first embodiment of the present invention, the system comprising:

[0023] An appearance acquisition device is arranged opposite to the appearance detection area of ​​the electronic cigarette, and is used to perform an imaging operation on the appearance detection area to obtain and output a corresponding area acquisition image, wherein the appearance detection area of ​​the electronic cigarette includes a mouthpiece portion or a cigarette rod portion of the electronic cigarette;

[0024] Specifically, the appearance acquisition device is arranged opposite to the appearance detection area of ​​the electronic cigarette, and is used to perform an imaging action on the appearance detection area to obtain and output a corresponding regional acquisition image, and the appearance detection area of ​​the electronic cigarette includes a part of the mouthpiece area or a part of the cigarette rod area of ​​the electronic cigarette. The ultra-clear imaging device can be selected to implement the appearance acquisition device, which is arranged opposite to the appearance detection area of ​​the electronic cigarette, and is used to perform an imaging action on the appearance detection area to obtain and output a corresponding regional acquisition image, and the appearance detection area of ​​the electronic cigarette includes a part of the mouthpiece area or a part of the cigarette rod area of ​​the electronic cigarette;

[0025] A targeted optimization device, connected to the appearance acquisition device, for successively performing band-stop filtering, histogram equalization, and Kirsch operator-based image content sharpening processing on the received regional acquisition image, so as to obtain and output a corresponding targeted optimization image;

[0026] The first-layer grabbing mechanism is connected to the targeted optimization device and is used to receive the targeted optimization image, detect each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, and for each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, obtain each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on the pixel row;

[0027] Specifically, an ASIC chip may be selected to implement the first-layer capture mechanism, which is connected to the targeted optimization device and is used to receive the targeted optimization image, detect each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, and for each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, obtain each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on the pixel row;

[0028] A secondary layer grabbing mechanism is connected to the primary layer grabbing mechanism and is used to calculate the average of each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on each pixel row in the targeted optimized image, so as to obtain a reference color channel value corresponding to the pixel row;

[0029] The last-layer grabbing mechanism is connected to the second-layer grabbing mechanism, and is used to judge that there is color mixing in the entity of the appearance to be detected area when the standard deviation of the reference color channel values ​​corresponding to each pixel row occupied by the appearance to be detected area in the targeted optimized image is greater than or equal to the set standard deviation limit; otherwise, it is judged that there is no color mixing in the entity of the appearance to be detected area;

[0030] Wherein, the targeted optimization device is connected to the appearance acquisition device and is used to successively perform band-stop filtering processing, histogram equalization processing and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimization image, including: the targeted optimization device includes a filtering processing unit, an enhancement processing unit and a sharpening processing unit, the enhancement processing unit is respectively connected to the filtering processing unit and the sharpening processing unit, and the filtering processing unit is connected to the appearance acquisition device;

[0031] Among them, the targeted optimization device is connected to the appearance acquisition device, and is used to successively perform band-stop filtering processing, histogram equalization processing, and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimization image. The filtering processing unit is used to perform band-stop filtering processing on the received image data, the enhancement processing unit is used to perform histogram equalization processing on the received image data, and the sharpening processing unit is used to perform image content sharpening processing based on the Kirsch operator on the received image data;

[0032] Among them, the targeted optimization device is connected to the appearance acquisition device, and is used to successively perform band-stop filtering processing, histogram equalization processing, and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimization image. It also includes: the filtering processing unit, the enhancement processing unit, and the sharpening processing unit share the same serial port configuration device;

[0033] And wherein, the targeted optimization device is connected to the appearance acquisition device, and is used to successively perform band-stop filtering processing, histogram equalization processing, and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimized image, and also includes: the filtering processing unit, the enhancement processing unit, and the sharpening processing unit respectively use different serial port configuration addresses.

[0034] Figure 2 1 is a diagram showing the internal structure of an electronic cigarette appearance mixed color identification system according to a second embodiment of the present invention.

[0035] exist Figure 2 In, with Figure 1 Differently, the electronic cigarette appearance mixed color identification system shown in the second embodiment of the present invention may also include:

[0036] An on-site storage device is connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism respectively, and is used to provide data temporary storage services for the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in a time-sharing manner;

[0037] Specifically, the on-site storage device is a TF storage device or a CF storage device, which is used to provide data temporary storage services for the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in a time-sharing manner;

[0038] Wherein, the on-site storage device is respectively connected with the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to provide data temporary storage services for the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in a time-sharing manner, including: the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism are respectively connected with the on-site storage device using different data channels;

[0039] Among them, the on-site storage device is respectively connected to the targeted optimization equipment, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to provide data temporary storage services for the targeted optimization equipment, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in a time-sharing manner, including: the targeted optimization equipment, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism use the same reference clock signal.

[0040] Figure 3 1 is a diagram showing the internal structure of an electronic cigarette appearance mixed color identification system according to a third embodiment of the present invention.

[0041] exist Figure 3 In, with Figure 1 Differently, the electronic cigarette appearance mixed color identification system shown in the third embodiment of the present invention may also include:

[0042] A content display device is connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism respectively, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism;

[0043] Wherein, the content display device is respectively connected with the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, including: the simultaneously displayed various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism includes the sleep state or working state of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism;

[0044] Wherein, the content display device is respectively connected with the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and further includes: the content display device is a liquid crystal display screen or an LED display array;

[0045] Wherein, the content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and further includes: the LED display array is composed of a plurality of LED display units arranged in a rectangular matrix mode;

[0046] And wherein, the content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and also includes: the structure of the multiple LED display units arranged in a rectangular matrix pattern is the same.

[0047] In addition, in the electronic cigarette appearance mixed color identification system, the targeted optimized image is received, and each pixel row occupied by the appearance to be detected area in the targeted optimized image is detected. For each pixel row occupied by the appearance to be detected area in the targeted optimized image, the color channel values ​​corresponding to each pixel point covered by the appearance to be detected area on the pixel row are obtained, including: the color channel values ​​corresponding to each pixel point are the cyan channel value, magenta channel value, yellow channel value and black channel value of the pixel point in the CMYK color space.

[0048] Although the present invention has been described in considerable detail, it should be appreciated that the elements thereof may be modified by one skilled in the art without departing from the spirit and scope of the present invention. It is believed that the system of the present invention and the advantages attendant thereto will be understood by the foregoing description, and it is clear that various changes may be made to the form, structure and arrangement of its components therein without departing from the scope and spirit of the present invention or sacrificing all of the substantial advantages of the present invention, and since the form heretofore described is merely an illustrative embodiment of the present invention, no additional substantial changes will be provided. The claims are intended to cover and include such changes.

Claims

1. An electronic cigarette appearance mixed color identification system, characterized in that: The system comprises: An appearance acquisition device is arranged opposite to the appearance detection area of ​​the electronic cigarette, and is used to perform an imaging operation on the appearance detection area to obtain and output a corresponding area acquisition image, wherein the appearance detection area of ​​the electronic cigarette includes a mouthpiece portion or a cigarette rod portion of the electronic cigarette; A targeted optimization device, connected to the appearance acquisition device, for successively performing band-stop filtering, histogram equalization, and Kirsch operator-based image content sharpening processing on the received regional acquisition image, so as to obtain and output a corresponding targeted optimization image; The first-layer grabbing mechanism is connected to the targeted optimization device and is used to receive the targeted optimization image, detect each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, and for each pixel row occupied by the appearance to-be-detected area in the targeted optimization image, obtain each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on the pixel row; A secondary layer grabbing mechanism is connected to the primary layer grabbing mechanism and is used to calculate the average of each color channel value corresponding to each pixel point covered by the appearance to-be-detected area on each pixel row in the targeted optimized image, so as to obtain a reference color channel value corresponding to the pixel row; The last-layer grabbing mechanism is connected to the second-layer grabbing mechanism, and is used to judge that there is color mixing in the entity of the appearance to be detected area when the standard deviation of the reference color channel values ​​corresponding to each pixel row occupied by the appearance to be detected area in the targeted optimized image is greater than or equal to the set standard deviation limit; otherwise, it is judged that there is no color mixing in the entity of the appearance to be detected area; Among them, the targeted optimization device is connected to the appearance acquisition device, and is used to successively perform band-stop filtering processing, histogram equalization processing and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimization image, including: the targeted optimization device includes a filtering processing unit, an enhancement processing unit and a sharpening processing unit, the enhancement processing unit is respectively connected to the filtering processing unit and the sharpening processing unit, and the filtering processing unit is connected to the appearance acquisition device.

2. The electronic cigarette appearance mixed color identification system according to claim 1, characterized in that: A targeted optimization device, connected to the appearance acquisition device, is used to successively perform band-stop filtering processing, histogram equalization processing, and image content sharpening processing based on a Kirsch operator on the received regional acquisition image to obtain and output a corresponding targeted optimization image. The device also includes: the filtering processing unit is used to perform band-stop filtering processing on the received image data, the enhancement processing unit is used to perform histogram equalization processing on the received image data, and the sharpening processing unit is used to perform image content sharpening processing based on a Kirsch operator on the received image data; Among them, the targeted optimization device is connected to the appearance acquisition device, and is used to successively perform band-stop filtering processing, histogram equalization processing, and image content sharpening processing based on the Kirsch operator on the received regional acquisition image to obtain and output the corresponding targeted optimization image. It also includes: the filtering processing unit, the enhancement processing unit, and the sharpening processing unit share the same serial port configuration device; Among them, the targeted optimization device is connected to the appearance acquisition device, and is used to perform band-stop filtering processing, histogram equalization processing and image content sharpening processing based on Kirsch operator on the received regional acquisition image in sequence to obtain and output the corresponding targeted optimization image. It also includes: the filtering processing unit, the enhancement processing unit and the sharpening processing unit respectively use different serial port configuration addresses.

3. The electronic cigarette appearance mixed color identification system according to claim 2, characterized in that: The system further comprises: An on-site storage device is connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism respectively, and is used to provide data temporary storage services for the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in a time-sharing manner; Among them, the on-site storage device is respectively connected to the targeted optimization equipment, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to provide data temporary storage services for the targeted optimization equipment, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in time-sharing, including: the targeted optimization equipment, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism are respectively connected to the on-site storage device using different data channels.

4. The electronic cigarette appearance mixed color identification system according to claim 3, characterized in that: The on-site storage device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to provide data temporary storage services for the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism in a time-sharing manner, including: the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism use the same reference clock signal.

5. The electronic cigarette appearance mixed color identification system according to claim 2, characterized in that: The system further comprises: The content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism.

6. The electronic cigarette appearance mixed color identification system according to claim 5, characterized in that: The content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, including: the various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism displayed simultaneously includes the sleep state or working state of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism.

7. The electronic cigarette appearance mixed color identification system according to claim 6, characterized in that: The content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and also includes: the content display device is a liquid crystal display screen or an LED display array.

8. The electronic cigarette appearance mixed color identification system according to claim 7, characterized in that: The content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and also includes: the LED display array is composed of multiple LED display units arranged in a rectangular matrix pattern.

9. The electronic cigarette appearance mixed color identification system according to claim 8, characterized in that: The content display device is respectively connected to the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and is used to simultaneously display various status information of the targeted optimization device, the first-layer grabbing mechanism, the second-layer grabbing mechanism and the last-layer grabbing mechanism, and also includes: the structure of the multiple LED display units arranged in a rectangular matrix pattern is the same.

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