CN112389116A - Wiping mechanism for intelligent blackboard and control system and method thereof - Google Patents

Wiping mechanism for intelligent blackboard and control system and method thereof Download PDF

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Publication number
CN112389116A
CN112389116A CN202011291868.3A CN202011291868A CN112389116A CN 112389116 A CN112389116 A CN 112389116A CN 202011291868 A CN202011291868 A CN 202011291868A CN 112389116 A CN112389116 A CN 112389116A
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CN
China
Prior art keywords
wiping
intelligent blackboard
module
electric
telescopic rod
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011291868.3A
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Chinese (zh)
Inventor
朱玉荣
汤鹏飞
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Anhui Wenxiang Information Technology Co Ltd
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Anhui Wenxiang Information Technology Co Ltd
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Priority to CN202011291868.3A priority Critical patent/CN112389116A/en
Publication of CN112389116A publication Critical patent/CN112389116A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • B43L21/04Wiper holders
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/017Gesture based interaction, e.g. based on a set of recognized hand gestures

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drawing Aids And Blackboards (AREA)

Abstract

The invention discloses a wiping mechanism for an intelligent blackboard, and relates to the technical field of intelligent blackboards. The intelligent blackboard comprises two guide rails arranged right above and below the intelligent blackboard, wherein two ends of each guide rail are respectively provided with an electric slider capable of moving along the length direction of the guide rail; an electric telescopic rod is arranged on the electric sliding block, a fixed seat is arranged at the end part of the electric telescopic rod, and a wiping module for wiping the intelligent blackboard is arranged on the fixed seat; the wiping module comprises a cylinder fixedly arranged on the fixed seat, the end part of the cylinder is provided with a base block, and one side surface of the base block, which is close to the intelligent blackboard, is provided with a wiping sponge I. According to the intelligent blackboard eraser, the intelligent blackboard is intelligently erased through the arrangement of the electric sliding block, the electric telescopic rod and the erasing module, the erasing is convenient, the erasing labor intensity is reduced, and the erasing efficiency is improved.

Description

Wiping mechanism for intelligent blackboard and control system and method thereof
Technical Field
The invention belongs to the technical field of intelligent blackboards, and particularly relates to a wiping mechanism for an intelligent blackboard and a control system and method thereof.
Background
Along with the development of economy and the improvement of living standard, the teaching and education equipment also makes great progress. Especially, the development is rapid in the aspect of multimedia teaching, and the intelligent blackboard is produced at the same time. The intelligent blackboard combines a traditional handwriting blackboard with multimedia equipment, is easily switched between chalk blackboard writing and multimedia application, can be used for normally writing with chalk in the same area like a common blackboard, and can also be used for watching various rich multimedia applications such as videos, pictures, animations and the like by hand touch in the same area like a large Pad. When writing with the chalk on the wisdom blackboard, often need clean through the blackboard eraser, subsequent writing and teaching of being convenient for. Then, the existing blackboard is erased by adopting a blackboard eraser, the operation mode not only can influence the physical health of a teacher, but also the manual erasing of the whole blackboard is slow, and the teaching time is influenced.
Disclosure of Invention
The invention aims to provide a wiping mechanism for an intelligent blackboard and a control system and a control method thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a wiping mechanism for an intelligent blackboard, which comprises two guide rails arranged right above and below the intelligent blackboard, wherein two ends of each guide rail are respectively provided with an electric slider capable of moving along the length direction of the guide rail; the intelligent blackboard eraser comprises an electric sliding block, an intelligent blackboard and a control module, wherein an electric telescopic rod is arranged on the electric sliding block, a fixed seat is arranged at the end part of the electric telescopic rod, and a wiping module for wiping the intelligent blackboard is arranged on the fixed seat; the wiping module comprises a cylinder fixedly arranged on the fixing seat, the end part of the cylinder is provided with a base block, and one side surface of the base block, which is close to the intelligent blackboard, is provided with a wiping sponge I.
Furthermore, a cavity is arranged at the center of the base block, a miniature rotating motor is arranged on the bottom side face of the cavity, an elastic telescopic device is arranged at the end of the miniature rotating motor, a base plate is arranged at the end of the elastic telescopic device, and a second wiping sponge is arranged on the outer side of the base plate.
Furthermore, the outer side of the second wiping sponge protrudes out of the first wiping sponge; and the elastic telescopic device comprises an inner sleeve and an outer sleeve which are mutually sleeved, and a spring is connected between the inner sleeve and the outer sleeve.
A control system of a wiping mechanism for an intelligent blackboard comprises the wiping mechanism for the intelligent blackboard and a main processor, wherein the signal output end of the main processor is connected with an electric sliding block, an electric lifting rod, a cylinder and a micro rotating motor; the signal output end of the main processor is also connected with an image analysis module, a first distance detection sensor and a second distance detection sensor; the signal output end of the image analysis module is also connected with an image acquisition module; the distance detection sensor I is arranged on one side of the base block and used for detecting the distance L1 between the wiping sponge and the intelligent blackboard; and the second distance detection sensor is arranged at the end parts of the two ends of the guide rail and is used for detecting the distance L2 between the electric slide block and the end part of the guide rail.
Further, the image acquisition module selects a high-definition CCD camera, and the image acquisition module is installed on the front face of the intelligent blackboard.
Further, control system is still including setting up the location strip of both sides about the wisdom blackboard, the location strip is the strip structure, and it is on a plurality of position units that show that the equal gap distributes in proper order, arbitrary one it all includes red instruction area, blue instruction area, yellow instruction area and white instruction area in proper order to show the position unit, red instruction area, blue instruction area, yellow instruction area and white instruction area length are the same.
A control method of a wiping mechanism control system for an intelligent blackboard comprises the following steps:
stp1, making a gesture needing to be wiped by an operator in an area needing to be wiped on the intelligent blackboard;
the Stp2 and the image acquisition module acquire gesture information and transmit the acquired image information to the image analysis module;
the Stp3 and the image analysis module analyze the acquired image information, judge whether the blackboard wiping is needed or not and judge the specific wiping range;
stp4, determining the wiping program according to the range of the specific wiping;
stp5, the processor controls the electric slide block, the electric telescopic rod, the air cylinder and the micro-rotating motor to operate correspondingly according to the wiping program determined by the step Stp 4.
Further, in the above Stp5, when it is determined that local wiping is required, the electric slider and the electric telescopic rod are controlled to move to the corresponding wiping area when the wiping module moves, and then the electric slider and the electric telescopic rod extend to the area to be wiped where the wiping sponge two contacts the smart blackboard through the control cylinder, and then the micro rotating motor is controlled to rotate to drive the wiping sponge two to rotate to wipe the area to be wiped of the smart blackboard.
Further, in the above Stp5, when it is determined that a large-scale wiping is required, the electric slider and the electric telescopic rod are controlled to move until the wiping module moves to an edge side of the corresponding wiping area, and then the electric slider and the electric telescopic rod extend out to a position where the wiping sponge contacts the area to be wiped of the intelligent blackboard through the control cylinder, and then the electric slider is continuously controlled to move along the length direction of the guide rail and/or the electric telescopic rod extends out and contracts to a position where the wiping module moves to an edge side of the corresponding wiping area, thereby wiping the area to be wiped of the intelligent blackboard.
Further, after the Stp5, the cylinder is controlled to recover the initial position, the electric slider is controlled to move along the length direction of the guide rail, the electric lifting rod is controlled to contract to the edge of the wiping area, the wiping module moves out of the edge of the wiping area, whether the wiping area is cleaned is judged through the image acquisition module and the image analysis module, and if so, the electric slider, the electric lifting rod and the cylinder are controlled to recover the initial state; otherwise, the step Stp5 is repeated.
The invention has the following beneficial effects:
according to the intelligent blackboard eraser, the intelligent blackboard is intelligently erased through the arrangement of the electric sliding block, the electric telescopic rod and the erasing module, the erasing is convenient, the erasing labor intensity is reduced, and the erasing efficiency is improved; meanwhile, gesture information is collected and analyzed through the image collection module and the image analysis module, so that the intelligent region to be wiped is judged, and the wiping mechanism is controlled to wipe.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a wiping mechanism according to the present invention;
fig. 2 is a schematic structural diagram of a wiping module according to the present invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-2, the invention relates to a wiping mechanism for an intelligent blackboard, which comprises two guide rails 12 arranged right above and right below the intelligent blackboard 1, wherein two ends of the guide rails 12 are respectively provided with an electric slider 2 capable of moving along the length direction of the guide rails 12; an electric telescopic rod 21 is arranged on the electric sliding block 2, a fixed seat 22 is arranged at the end part of the electric telescopic rod 21, and a wiping module 3 for wiping the intelligent blackboard 1 is arranged on the fixed seat 22; the wiping module 3 comprises a cylinder 31 fixed on the fixing base 22, a base block 32 is arranged at the end of the cylinder 31, and a wiping sponge 33 is arranged on one side surface of the base block 32 close to the intelligent blackboard 1.
Preferably, a cavity is arranged at the center of the base block 32, a micro rotating motor is arranged on the bottom side surface of the cavity, an elastic expansion device is arranged at the end of the micro rotating motor, a base plate is arranged at the end of the elastic expansion device, and a second wiping sponge is arranged on the outer side of the base plate.
Preferably, the outer side of the second wiping sponge protrudes out of the first wiping sponge 33; and the elastic telescopic device comprises an inner sleeve and an outer sleeve which are mutually sleeved, and a spring is connected between the inner sleeve and the outer sleeve.
A control system of a wiping mechanism for an intelligent blackboard comprises the wiping mechanism for the intelligent blackboard and a main processor, wherein the signal output end of the main processor is connected with an electric slider 2, an electric telescopic rod 21, a cylinder 31 and a micro rotating motor; the signal output end of the main processor is also connected with an image analysis module, a first distance detection sensor and a second distance detection sensor; the signal output end of the image analysis module is also connected with an image acquisition module; the distance detection sensor I is arranged on one side of the base block 32 and used for detecting the distance L1 between the wiping sponge I33 and the intelligent blackboard 1; the second distance detection sensor is provided at both end portions of the guide rail 12, and detects a distance L2 between the electric slider 2 and the end portion of the guide rail 12.
Preferably, the image acquisition module is a high-definition CCD camera, and the image acquisition module is installed right on the front face of the intelligent blackboard 1.
Preferably, control system is still including setting up the location strip 11 at 1 upper and lower both sides edge side of wisdom blackboard, and location strip 11 is the strip structure, and the equal clearance distributes a plurality of unit of showing in proper order on it, and arbitrary unit of showing all includes red instruction area, blue instruction area, yellow instruction area and white instruction area in proper order, and red instruction area, blue instruction area, yellow instruction area and white instruction area length are the same.
Through the setting of location strip 11 by different colour instruction strips, make things convenient for high definition CCD camera to carry out image acquisition back, judge the position of gesture fast to and the scope of gesture, convenient control simultaneously cleans module 3 accurate, quick removal to gesture department and carries out quick location to cleaning module 3.
A control method of a wiping mechanism control system for an intelligent blackboard comprises the following steps:
stp1, making a gesture needing to be wiped in the area needing to be wiped on the intelligent blackboard 1 by an operator;
the Stp2 and the image acquisition module acquire gesture information and transmit the acquired image information to the image analysis module;
the Stp3 and the image analysis module analyze the acquired image information, judge whether the blackboard wiping is needed or not and judge the specific wiping range;
stp4, determining the wiping program according to the range of the specific wiping;
stp5, the processor controls the electric slider 2, the electric telescopic rod 21, the cylinder 31 and the micro-rotating motor to operate correspondingly according to the wiping program determined in step Stp 4.
Preferably, in the above Stp5, when it is determined that partial wiping is required, the electric slider 2 and the electric telescopic rod 21 are controlled to move until the wiping module 3 moves to a corresponding wiping area, and then the control cylinder 31 extends to a position where the second wiping sponge contacts the area to be wiped of the intelligent blackboard 1, and then the micro rotating motor is controlled to rotate to drive the second wiping sponge to rotate to wipe the area to be wiped of the intelligent blackboard 1.
Preferably, in the above Stp5, when it is determined that the wide-range wiping is required, the electric slider 2 and the electric telescopic rod 21 are controlled to operate until the wiping module 3 moves to one edge side of the corresponding wiping area, and then the electric slider 2 and the electric telescopic rod 21 extend and contract until the wiping sponge 33 contacts the area to be wiped of the intelligent blackboard 1 through the control cylinder 31, and then the electric slider 2 is continuously controlled to move along the longitudinal direction of the guide rail 12 and/or the electric telescopic rod 21 extends and contracts until the wiping module 3 moves to one edge side of the corresponding wiping area, thereby wiping the area to be wiped of the intelligent blackboard 1.
Preferably, after the Stp5, the cylinder 31 is controlled to recover the initial position, and then the electric slider 2 is controlled to move along the length direction of the guide rail 12, and the electric telescopic rod 21 is controlled to contract until the wiping module 3 moves out to the edge of the wiping area, and meanwhile, whether the wiping is clean is judged by the image acquisition module and the image analysis module, if so, the electric slider 2, the electric telescopic rod 21 and the cylinder 31 are controlled to recover the initial state; otherwise, the step Stp5 is repeated.
Preferably, in the above Stp5, the maximum moving distance of the electric slider 2 is 2/3 of the length of the guide rail 12.
Meanwhile, in the above Stp4, after the specific wiping range is determined, the wiping program is determined by controlling the corresponding wiping module 3 to move into the wiping area according to the wiping range determination requirement.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (10)

1. The utility model provides an wisdom is wiping mechanism for blackboard which characterized in that: the intelligent blackboard comprises two guide rails (12) arranged right above and below an intelligent blackboard (1), wherein two ends of each guide rail (12) are respectively provided with an electric sliding block (2) capable of moving along the length direction of each guide rail (12);
an electric telescopic rod (21) is arranged on the electric sliding block (2), a fixed seat (22) is arranged at the end part of the electric telescopic rod (21), and a wiping module (3) for wiping the intelligent blackboard (1) is arranged on the fixed seat (22);
wherein, it sets firmly to clean module (3) including one cylinder (31) on fixing base (22), the tip of cylinder (31) is provided with a base block (32), a side that base block (32) are close to wisdom blackboard (1) is provided with cleans sponge (33).
2. The wiping mechanism for intelligent blackboard according to claim 1, wherein the base block (32) has a cavity at its center, the bottom side of the cavity has a micro rotating motor, the end of the micro rotating motor has an elastic expansion device, the end of the elastic expansion device has a base plate, and the outside of the base plate has a second wiping sponge.
3. The wiping mechanism for the intelligent blackboard according to claim 2, wherein the outer side of the second wiping sponge protrudes out of the first wiping sponge (33);
and the elastic telescopic device comprises an inner sleeve and an outer sleeve which are mutually sleeved, and a spring is connected between the inner sleeve and the outer sleeve.
4. A control system of a wiping mechanism for an intelligent blackboard comprising the wiping mechanism for an intelligent blackboard according to any one of claims 1 to 3, characterized in that;
the signal output end of the main processor is connected with the electric sliding block (2), the electric telescopic rod (21), the cylinder (31) and the micro rotating motor;
the signal output end of the main processor is also connected with an image analysis module, a first distance detection sensor and a second distance detection sensor;
the signal output end of the image analysis module is also connected with an image acquisition module;
the first distance detection sensor is arranged on one side of the base block (32) and used for detecting the distance L1 between the first wiping sponge (33) and the intelligent blackboard (1);
the second distance detection sensor is arranged at the end parts of the two ends of the guide rail (12) and used for detecting the distance L2 between the electric slider (2) and the end part of the guide rail (12).
5. The control system of the wiping mechanism for the intelligent blackboard according to claim 4, wherein the image acquisition module is a high-definition CCD camera, and the image acquisition module is installed on the front surface of the intelligent blackboard (1).
6. The control system of the wiping mechanism for the intelligent blackboard according to claim 4, further comprising positioning bars (11) disposed at the upper and lower edges of the intelligent blackboard (1), wherein the positioning bars (11) are in a strip structure, a plurality of position indicating units are sequentially distributed at equal intervals on the positioning bars, any one of the position indicating units sequentially comprises a red indicating band, a blue indicating band, a yellow indicating band and a white indicating band, and the red indicating band, the blue indicating band, the yellow indicating band and the white indicating band are the same in length.
7. The control method of a wiping mechanism control system for an intelligent blackboard according to any one of claims 4 to 6, comprising the steps of:
stp1, making a gesture needing to be wiped in an area needing to be wiped on the intelligent blackboard (1) by an operator;
the Stp2 and the image acquisition module acquire gesture information and transmit the acquired image information to the image analysis module;
the Stp3 and the image analysis module analyze the acquired image information, judge whether the blackboard wiping is needed or not and judge the specific wiping range;
stp4, determining the wiping program according to the range of the specific wiping;
stp5, the processor controls the electric slide block (2), the electric telescopic rod (21), the air cylinder (31) and the micro rotating motor to operate correspondingly according to the wiping program determined in the step Stp 4.
8. The control method of the control system of the wiping mechanism for the intelligent blackboard according to claim 7, characterized in that in the Stp5, when it is determined that the local wiping is required, the electric slider (2) and the electric telescopic rod (21) are controlled to move until the wiping module (3) moves to the corresponding wiping area, and then the wiping module extends out to the area to be wiped where the wiping sponge (two) contacts the intelligent blackboard (1) through the control cylinder (31), and then the micro-rotating motor is controlled to rotate to drive the wiping sponge (two) to rotate to wipe the area to be wiped of the intelligent blackboard (1).
9. The control method of the control system of the wiping mechanism for an intelligent blackboard according to claim 7, wherein in the Stp5, when it is determined that a large-scale wiping is required, the electric slider (2) and the electric telescopic rod (21) are controlled to operate until the wiping module (3) moves to one edge side of the corresponding wiping area, and then the electric slider (2) is extended to the wiping sponge (33) through the control cylinder (31) to contact the area to be wiped of the intelligent blackboard (1), and then the electric slider (2) is continuously controlled to move along the length direction of the guide rail (12) and/or the electric telescopic rod (21) is extended and contracted until the wiping module (3) moves to one edge side of the corresponding wiping area, thereby wiping the area to be wiped of the intelligent blackboard (1).
10. The control method of the control system of the wiping mechanism for the intelligent blackboard according to claim 8 or 9, characterized in that after the Stp5, the cylinder (31) is controlled to return to the initial position, then the electric slider (2) is controlled to move along the length direction of the guide rail (12), and the electric telescopic rod (21) is controlled to retract to the edge of the wiping area where the wiping module (3) moves out, and meanwhile, the image acquisition module and the image analysis module determine whether the wiping is clean, if so, the electric slider (2), the electric telescopic rod (21) and the cylinder (31) are controlled to return to the initial state; otherwise, the step Stp5 is repeated.
CN202011291868.3A 2020-11-18 2020-11-18 Wiping mechanism for intelligent blackboard and control system and method thereof Withdrawn CN112389116A (en)

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Application Number Priority Date Filing Date Title
CN202011291868.3A CN112389116A (en) 2020-11-18 2020-11-18 Wiping mechanism for intelligent blackboard and control system and method thereof

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Application Number Priority Date Filing Date Title
CN202011291868.3A CN112389116A (en) 2020-11-18 2020-11-18 Wiping mechanism for intelligent blackboard and control system and method thereof

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102476534A (en) * 2010-11-21 2012-05-30 杨茜 Intelligent blackboard
CN105291652A (en) * 2015-09-28 2016-02-03 北京沃富瑞德文化传播有限公司 Multimedia television blackboard
CN105667136A (en) * 2014-11-20 2016-06-15 郑俊 Multifunctional interaction type intelligent multimedia electronic blackboard technology
CN105856915A (en) * 2016-04-26 2016-08-17 南阳理工学院 English teaching blackboard and using method thereof
CN106427313A (en) * 2015-08-19 2017-02-22 苏州泛普纳米科技有限公司 Combined intelligent blackboard
CN109435548A (en) * 2018-11-12 2019-03-08 广州市轻工高级技工学校 A kind of blackboard eraser
CN208946931U (en) * 2018-05-25 2019-06-07 武汉科技大学 A kind of blackboard cleaning device and blackboard
CN209141753U (en) * 2018-09-04 2019-07-23 路敦勤 A kind of environmental-protecting type electric blackboard
CN110481207A (en) * 2019-08-16 2019-11-22 吴扬辉 A kind of intelligently wiping blackboard system and its wiping method
CN209756561U (en) * 2019-04-18 2019-12-10 江苏海事职业技术学院 Based on college english teaching is with erasing integral type blackboard

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102476534A (en) * 2010-11-21 2012-05-30 杨茜 Intelligent blackboard
CN105667136A (en) * 2014-11-20 2016-06-15 郑俊 Multifunctional interaction type intelligent multimedia electronic blackboard technology
CN106427313A (en) * 2015-08-19 2017-02-22 苏州泛普纳米科技有限公司 Combined intelligent blackboard
CN105291652A (en) * 2015-09-28 2016-02-03 北京沃富瑞德文化传播有限公司 Multimedia television blackboard
CN105856915A (en) * 2016-04-26 2016-08-17 南阳理工学院 English teaching blackboard and using method thereof
CN208946931U (en) * 2018-05-25 2019-06-07 武汉科技大学 A kind of blackboard cleaning device and blackboard
CN209141753U (en) * 2018-09-04 2019-07-23 路敦勤 A kind of environmental-protecting type electric blackboard
CN109435548A (en) * 2018-11-12 2019-03-08 广州市轻工高级技工学校 A kind of blackboard eraser
CN209756561U (en) * 2019-04-18 2019-12-10 江苏海事职业技术学院 Based on college english teaching is with erasing integral type blackboard
CN110481207A (en) * 2019-08-16 2019-11-22 吴扬辉 A kind of intelligently wiping blackboard system and its wiping method

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Application publication date: 20210223