CN113915484A - Fisheye type class board multimedia publishing machine - Google Patents

Fisheye type class board multimedia publishing machine Download PDF

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Publication number
CN113915484A
CN113915484A CN202111219585.2A CN202111219585A CN113915484A CN 113915484 A CN113915484 A CN 113915484A CN 202111219585 A CN202111219585 A CN 202111219585A CN 113915484 A CN113915484 A CN 113915484A
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China
Prior art keywords
data
fisheye
module
multimedia
distributor
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Pending
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CN202111219585.2A
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Chinese (zh)
Inventor
陈朋智
叶秀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Laiying Construction Technology Co ltd
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Guangdong Laiying Construction Technology Co ltd
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Priority to CN202111219585.2A priority Critical patent/CN113915484A/en
Publication of CN113915484A publication Critical patent/CN113915484A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/22—Undercarriages with or without wheels with approximately constant height, e.g. with constant length of column or of legs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

The invention discloses a fisheye type class-brand multimedia distributor, which relates to the field of multimedia distributors and aims at solving the problems that the conventional multimedia distributor needs to copy contents by a computer and then a person specially assigned to a distributor online shop to replace a CF card, so that the operation causes human resource waste and the efficiency is very low. The fisheye type class board multimedia distributor can uniformly update the distribution content and can directly download the updated content to the advertising machine, so that manual transmission is avoided, and the cost is saved.

Description

Fisheye type class board multimedia publishing machine
Technical Field
The invention relates to the field of multimedia issuing machines, in particular to a fisheye type class-plate multimedia issuing machine.
Background
The multimedia issuing machine in each large organization has replaced the former small blackboard by accident, the information is transmitted to the places where the specification personnel circulate through the network advertising machine, the announcement information can be transmitted to everyone more quickly and accurately, the multimedia issuing machine is widely applied to the industries such as traffic, banks, sales places, office buildings, hotel restaurants and the like, the multimedia issuing machine in the market at present is not convenient for the viewing angle of the regulator due to the fact that the multimedia issuing machine is usually arranged in an integrated mode when in use, and the multimedia issuing machine is difficult to disassemble when the issuing machine body is maintained subsequently, so that the maintenance difficulty is increased, and certain defects exist.
Aiming at the problems that at present, after contents need to be copied by a computer, a person specially needs to go to a publishing machine online shop to replace a CF card, so that the operation causes waste of human resources and the efficiency is low, a fisheye type class card multimedia publishing machine is provided.
Disclosure of Invention
The invention provides a fisheye type class-brand multimedia issuing machine, which solves the problems that the conventional multimedia issuing machine needs to copy contents by a computer firstly and then a person specially assigned to an issuing machine online shop to replace a CF card, so that the operation causes waste of human resources and the efficiency is low.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a fisheye formula class tablet multi-media cloth distribution machine, includes the support, the top fixed mounting of support has adjustment mechanism, adjustment mechanism is rotary type fixed knot structure, adjustment mechanism's inside runs through and is provided with the control box, just the internally mounted of control box has microprocessor, one side of microprocessor is provided with the network connection module, one side of control box is provided with the issuing machine body, one side of cloth distribution machine body evenly is provided with data interface.
Preferably, adjustment mechanism includes mounting bracket, separation blade, fixed plate, connecting plate, spacing axle, accomodates groove, arm-tie, axis of rotation and mounting groove, mounting bracket and support fixed connection, the mounting bracket is the indent formula setting.
Preferably, the inside of mounting bracket is provided with the fixed plate, the axis of rotation is installed to the bilateral symmetry of fixed plate, just the axis of rotation is articulated with the inner wall of mounting bracket, one side fixed mounting of fixed plate has the arm-tie.
Preferably, one side of the fixing plate is provided with a containing groove, the top of the containing groove is hinged with a connecting plate, and the bottom of the connecting plate is fixedly provided with a limiting shaft.
Preferably, the inner wall of the mounting rack is symmetrically provided with separation blades, and the separation blades are matched with the limiting shaft.
Preferably, one side of the fixing plate opposite to the accommodating groove is provided with an installation groove, and the installation groove is matched with the control box.
Preferably, one side of the microprocessor is provided with a data receiving module, the data receiving module is electrically connected with the network connection module, one side of the network connection module is provided with a data display module, and one side of the data display module is provided with a data storage module.
The data transmission system of the fisheye type class-card multimedia distributor comprises a control host, wherein a server is arranged inside the control host, a data warehouse is built inside the server, a data transmission module is arranged inside the control host, and the data transmission module is matched with a data receiving module.
Preferably, the control host is internally provided with a timing awakening module, and the timing awakening module is electrically connected with the data transmission module.
Preferably, the data warehouse internally comprises an ODS layer, a DWD layer, a DWS layer and an ADS layer, a data model is built in the data warehouse, and the data model internally comprises five areas, namely a system recording area, an internal management area, a summary area, an analysis area and a feedback area;
system record field: the consistency of data is ensured;
internal management domain: facilitating management of unified metadata;
summarizing the domain: partial report query is satisfied;
analysis domain: may be stored separately in the respective data marts;
feedback field: feedback data for the respective front end.
The invention has the beneficial effects that:
1. through internet IP access, the content to be updated is directly downloaded to the advertising player in the office control host, and deletion, sequencing, setting of playing rules and inter-cut control can be completed in a few minutes, so that a large amount of labor cost is saved, and the working efficiency is improved.
2. The device adopts wired Ethernet and wireless WLAN connection modes, multimedia release software is arranged in a Windows operating system, and the updating and deleting operation of the playing content can be realized through a release management background.
3. The device supports timing awakening, and the background uniformly updates the playing content conveniently.
4. The inside adjustment mechanism that sets up of the device is convenient for adjust the publisher body mechanical energy angle of adjustment to convenient to use person watches more, can dismantle the publisher body simultaneously, thereby changes the device's fixed mode.
In conclusion, the device can uniformly update the published content and can directly download the updated content to the advertising player, thereby avoiding manual transmission, saving more cost and being more convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the structure of the adjustment mechanism of the present invention.
Fig. 3 is a schematic structural diagram of the present invention.
FIG. 4 is a flow chart of the structure of the present invention.
Fig. 5 is a schematic structural diagram of the present invention.
Fig. 6 is a schematic diagram of a framework of the data warehouse of the present invention.
Reference numbers in the figures: 1. a support; 2. an adjustment mechanism; 201. a mounting frame; 202. a baffle plate; 203. a fixing plate; 204. a connecting plate; 205. a limiting shaft; 206. a receiving groove; 207. pulling a plate; 208. a rotating shaft; 209. mounting grooves; 3. a publisher body; 4. a data interface; 5. a control box; 6. a microprocessor; 7. a data receiving module; 8. a network connection module; 9. a data display module; 10. a data storage module; 11. a control host; 12. a server; 13. a data warehouse; 14. a data transmission module; 15. a timing wake-up module; 16. an ODS layer; 17. a DWD layer; 18. a DWS layer; 19. and (4) an ADS layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1-6, a fisheye type class tablet multimedia distributor is characterized in that an adjusting mechanism 2 is fixedly mounted at the top of a support 1, the adjusting mechanism 2 is a rotary type fixed structure, a control box 5 is arranged inside the adjusting mechanism 2 in a penetrating manner, a microprocessor 6 is mounted inside the control box 5, a network connection module 8 is arranged on one side of the microprocessor 6, a distributor body 3 is arranged on one side of the control box 5, a data interface 4 is uniformly arranged on one side of the distributor body 3, and the data interface 4 facilitates field data transmission.
As shown in fig. 2 and 3, the adjusting mechanism 2 includes an installation frame 201, a blocking piece 202, a fixing plate 203, a connecting plate 204, a limiting shaft 205, a storage groove 206, a pulling plate 207, a rotating shaft 208 and an installation groove 209, the installation frame 201 is fixedly connected with the support 1, the installation frame 201 is in a concave type arrangement, the support 1 is convenient for supporting the support, the fixing plate 203 is arranged inside the installation frame 201, the rotating shaft 208 is symmetrically installed on two sides of the fixing plate 203, the rotating shaft 208 is hinged to the inner wall of the installation frame 201, the pulling plate 207 is fixedly installed on one side of the fixing plate 203, the pulling plate 207 is convenient for pulling the fixing plate 203, the fixing plate 203 does circular motion under the action of the rotating shaft 208, the rotating shaft 208 is convenient for connecting the fixing plate 203 with the installation frame 201, the storage groove 206 is opened on one side of the fixing plate 203, and the connecting plate 204 is hinged to the top of the storage groove 206, the bottom of the connecting plate 204 is fixedly provided with a limiting shaft 205, the accommodating groove 206 is convenient for accommodating the connecting plate 204, meanwhile, the connecting plate 204 is hinged with the accommodating groove 206 so as to be convenient for rotating in the accommodating groove 206, the inner wall of the mounting frame 201 is symmetrically provided with the blocking pieces 202, the blocking pieces 202 are matched with the limiting shaft 205, the blocking pieces 202 are uniformly distributed on the inner wall of the mounting frame 201 and are combined with the limiting shaft 205 so as to be convenient for fixing the limiting shaft 205 and further fixing the fixing plate 203, meanwhile, the display angle of the distributor body 3 can be changed by adjusting the connecting position of the limiting shaft 205 and the blocking pieces 202, one side of the fixing plate 203 opposite to the accommodating groove 206 is provided with an installation groove 209, the installation groove 209 is matched with the control box 5 so as to be convenient for fixing the distributor body 3 and is combined with the control box 5 through the installation groove 209, be convenient for dismantle publisher body 3 to install through different modes, and be convenient for overhaul publisher body 3.
As shown in fig. 4, a data receiving module 7 is disposed on one side of the microprocessor 6, the data receiving module 7 is electrically connected to a network connection module 8, a data display module 9 is disposed on one side of the network connection module 8, a data storage module 10 is disposed on one side of the data display module 9, the data storage module 10 is convenient for storing data received by the data receiving module 7, and meanwhile, the data can be processed by the microprocessor 6 and displayed by the data display module 9 in cooperation with the distributor body 3, the network connection module 8 is connected by a wired ethernet or a wireless WLAN, multimedia distribution software is disposed in the Windows operating system, the connection mode is not limited, so that the device can be used more conveniently, and the operation of updating and deleting the playing content can be realized by the distribution management background.
Example 2
Referring to fig. 5, a data transmission system of a fisheye-type class-plate multimedia distributor comprises a control host 11, the control host 11 is provided with a server 12, a data warehouse 13 is established inside the server 12, a data transmission module 14 is arranged inside the control host 11, the data transmission module 14 is matched with a data receiving module 7, the control host 11 controls the server 12 arranged inside the control host to operate, the data warehouse 13 established inside the server 12 inquires and processes data, a timing wake-up module 15 is arranged inside the control host 11, the timing wake-up module 15 is electrically connected with the data transmission module 14, the data warehouse 13 transmits the inquired data through the data transmission module 14, and the timing wake-up module 15 can perform timing, thereby performing unified transmission.
As shown in fig. 6, the data warehouse 13 includes, inside thereof, an ODS layer 16, a DWD layer 17, a DWS layer 18, and an ADS layer 19:
ODS layer 16: storing original data, directly loading original logs and data, and storing original appearances of the data without processing;
DWD layer 17: the structure is consistent with the original granularity table, and the data of the ODS layer 16 is cleaned;
DWS layer 18: performing mild summary based on DWD;
ADS layer 19: providing data for various statistical reports;
the ODS layer 16, DWD layer 17, DWS layer 18 and ADS layer 19 are important architectures for the data warehouse 13;
meanwhile, a data model is built in the data warehouse 13, and the data model is divided into: the system comprises a system recording domain, an internal management domain, a summary domain, an analysis domain and a feedback domain:
system record field: this section is the main data warehouse 13 business data storage area where the data model ensures data consistency;
internal management domain: this section primarily stores metadata used by the data warehouse 13 for internal management, where the data model can facilitate management of unified metadata;
summarizing the domain: the data come from the summary of the system record domain, and the data model ensures the theme analysis performance of the analysis domain and meets the requirements of partial report query;
analysis domain: the data model is mainly used for the specific theme business analysis of each business part; this portion of the data model may be stored separately in the corresponding data mart;
feedback field: optionally, the data model is mainly used for feedback data of the corresponding front end, and the data warehouse 13 may set this area according to business requirements.
The type of the microprocessor 6 is as follows: STM 32.
When the invention is used, firstly, the bracket 1 is taken out, the bracket 1 is placed at a proper position, and the issuing machine body 3 is taken out at the same time, and the control box 5 arranged at one side of the issuing machine body 3 is combined with the mounting groove 209 arranged at one side of the fixing plate 203, so that the issuing machine body 3 can be fixed;
at this time, the pulling plate 207 fixedly installed on one side of the fixing plate 203 can be pulled, the fixing plate 203 is driven to rotate through the pulling plate 207, the connecting plate 204 which is rotatably connected with the inside of the accommodating groove 206 formed in one side of the fixing plate 203 is pulled to rotate, the limiting shaft 205 installed at the bottom of the connecting plate 204 is combined with the blocking piece 202 evenly installed on the inner wall of the mounting frame 201, and the blocking piece 202 is combined with the limiting shaft 205, so that the connecting plate 204 is fixed, the connecting plate 204 is fixed to form a triangular support with the fixing plate 203 hinged to one side of the connecting plate 204 after being fixed, the engine body 3 is fixed, and the display angle of the publisher body 3 can be changed by adjusting the positions of the limiting shaft 205 and the blocking piece 202;
meanwhile, the issuing machine body 3 can be taken down and fixed at a proper position in a hanging mode, so that the installation position of the issuing machine body 3 is changed;
the data interface 4 arranged on one side of the issuing machine body 3 can be connected with external equipment, so that the issuing machine body 3 is subjected to data transmission on site, and data display is carried out through the data display module 9 arranged in the control box 5;
meanwhile, the server 12 built in the control host 11 can be started, the server 12 queries and processes data through the data warehouse 13 arranged in the server 12, and transmits the queried data through the data transmission module 14, and at the moment, the timing can be performed through the timing awakening module 15, so that the unified transmission is performed;
when the awakening time is up, the data receiving module 7 arranged inside the control box 5 is matched with the network connection module 8 arranged on one side of the control box to receive data, the received data are stored inside the data storage module 10 arranged inside the control box 5, the data stored inside the data storage module 10 can be processed by the microprocessor 6 arranged inside the control box 5, and finally the data display module 9 arranged inside the control box 5 is matched with the cloth issuing machine body 3 to display the data, so that the remote control work of the cloth issuing machine body 3 is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. The utility model provides a fisheye formula class tablet multi-media cloth distribution machine, includes support (1), its characterized in that, the top fixed mounting of support (1) has adjustment mechanism (2), adjustment mechanism (2) are rotary type fixed knot to be constructed, the inside of adjustment mechanism (2) is run through and is provided with control box (5), just the internally mounted of control box (5) has microprocessor (6), one side of microprocessor (6) is provided with internet access module (8), one side of control box (5) is provided with publisher body (3), one side of cloth distribution machine body (3) evenly is provided with data interface (4).
2. A fisheye-type class-plate multimedia distributor as claimed in claim 1, wherein the adjusting mechanism (2) comprises a mounting frame (201), a blocking piece (202), a fixing plate (203), a connecting plate (204), a limiting shaft (205), a containing groove (206), a pulling plate (207), a rotating shaft (208) and a mounting groove (209), the mounting frame (201) is fixedly connected with the support (1), and the mounting frame (201) is arranged in a concave manner.
3. A fisheye-type multimedia dealing machine for class cards according to claim 2, wherein a fixing plate (203) is disposed inside the mounting frame (201), rotating shafts (208) are symmetrically installed on two sides of the fixing plate (203), the rotating shafts (208) are hinged to the inner wall of the mounting frame (201), and a pulling plate (207) is fixedly installed on one side of the fixing plate (203).
4. The fisheye-type class-plate multimedia distributor as claimed in claim 3, wherein a receiving groove (206) is formed in one side of the fixing plate (203), a connecting plate (204) is hinged to the top of the receiving groove (206), and a limiting shaft (205) is fixedly mounted at the bottom of the connecting plate (204).
5. The fisheye-type class card multimedia distributor as claimed in claim 4, wherein the inner wall of the mounting rack (201) is symmetrically provided with baffle plates (202), and the baffle plates (202) are matched with the limiting shaft (205).
6. The fisheye-type multimedia dealing machine for the class cards as claimed in claim 2, wherein a mounting groove (209) is formed in the side of the fixing plate (203) opposite to the accommodating groove (206), and the mounting groove (209) is matched with the control box (5).
7. A fisheye-type multimedia dealing machine for class cards as claimed in claim 1, wherein a data receiving module (7) is disposed on one side of the microprocessor (6), the data receiving module (7) is electrically connected to a network connection module (8), a data display module (9) is disposed on one side of the network connection module (8), and a data storage module (10) is disposed on one side of the data display module (9).
8. A data transmission system of a fisheye type class card multimedia distributor is characterized in that the data transmission system is applied to the fisheye type class card multimedia distributor as claimed in any one of claims 1 to 7, the fisheye type class card multimedia distributor comprises a control host (11), a server (12) is arranged inside the control host (11), a data warehouse (13) is established inside the server (12), a data transmission module (14) is arranged inside the control host (11), and the data transmission module (14) is matched with a data receiving module (7).
9. The data transmission system of the fisheye-type class-card multimedia distributor as claimed in claim 8, wherein the control host (11) is internally provided with a timing wake-up module (15), and the timing wake-up module (15) is electrically connected to the data transmission module (14).
10. The data transmission system of the fisheye-type class-plate multimedia distributor is characterized in that the data warehouse (13) internally comprises an ODS layer (16), a DWD layer (17), a DWS layer (18) and an ADS layer (19), a data model is built in the data warehouse (13), and the data model internally comprises five areas, namely a system recording area, an internal management area, a summary area, an analysis area and a feedback area;
system record field: the consistency of data is ensured;
internal management domain: facilitating management of unified metadata;
summarizing the domain: partial report query is satisfied;
analysis domain: may be stored separately in the respective data marts;
feedback field: feedback data for the respective front end.
CN202111219585.2A 2021-10-20 2021-10-20 Fisheye type class board multimedia publishing machine Pending CN113915484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111219585.2A CN113915484A (en) 2021-10-20 2021-10-20 Fisheye type class board multimedia publishing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111219585.2A CN113915484A (en) 2021-10-20 2021-10-20 Fisheye type class board multimedia publishing machine

Publications (1)

Publication Number Publication Date
CN113915484A true CN113915484A (en) 2022-01-11

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Application Number Title Priority Date Filing Date
CN202111219585.2A Pending CN113915484A (en) 2021-10-20 2021-10-20 Fisheye type class board multimedia publishing machine

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN107945712A (en) * 2017-09-18 2018-04-20 陈鹏 A kind of advertisement machine and its control system based on internet
CN212271755U (en) * 2020-04-07 2021-01-01 西安沃克智能科技有限公司 City management public parking stall surplus quantity display device
CN112199430A (en) * 2020-10-15 2021-01-08 苏州龙盈软件开发有限公司 Business data processing system and method based on data middling station
CN213900527U (en) * 2020-12-02 2021-08-06 广州智新电子科技有限公司 Electron class tablet convenient to installation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107945712A (en) * 2017-09-18 2018-04-20 陈鹏 A kind of advertisement machine and its control system based on internet
CN212271755U (en) * 2020-04-07 2021-01-01 西安沃克智能科技有限公司 City management public parking stall surplus quantity display device
CN112199430A (en) * 2020-10-15 2021-01-08 苏州龙盈软件开发有限公司 Business data processing system and method based on data middling station
CN213900527U (en) * 2020-12-02 2021-08-06 广州智新电子科技有限公司 Electron class tablet convenient to installation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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