CN105427681A - Mobile multimedia teaching system - Google Patents
Mobile multimedia teaching system Download PDFInfo
- Publication number
- CN105427681A CN105427681A CN201510898322.7A CN201510898322A CN105427681A CN 105427681 A CN105427681 A CN 105427681A CN 201510898322 A CN201510898322 A CN 201510898322A CN 105427681 A CN105427681 A CN 105427681A
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- guide rail
- projection screen
- projector
- bearing
- actuating unit
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Displays For Variable Information Using Movable Means (AREA)
- Projection Apparatus (AREA)
Abstract
The invention relates to a mobile multimedia teaching system. The mobile multimedia teaching system comprises a computer (1), a mobile projection screen subsystem (2) and a mobile projector subsystem (3), wherein the mobile projection screen subsystem (2) includes a projection screen (21), a power mechanism A (22), a guide rail A (23) and a guide rail B (24); the guide rail B (24) is arranged in an inclined way relative to the guide rail A (23); the power mechanism A (22) drives the projection screen (21) to slide on the guide rail A (23) and the guide rail B (24); in the mobile projector subsystem (3), a projector (31) can rotate to always face the projection screen (21) exactly; and the computer (1) is in control connection with the power mechanism A (22), a power mechanism B (32) and the projector (31). The mobile multimedia teaching system enables students to watch multimedia and see more blackboard-writing clearly at the same time, and can improve the classroom teaching efficiency, and at the same time enables the classmates at two sides of a classroom to have better watching visual angles while watching the multimedia.
Description
Technical field
The present invention relates to Teaching Technology of Multimedia field, particularly a kind of Mobile multimedia tutoring system.
Background technology
Multimedia teaching is a kind of form of teaching adopting multiple electronic instruction media and Traditional teaching means to combine, and because it has picture and text acoustic image and luxuriant feature, and from the mood of multi-angle mobilizing students, notice and interest, and can be widely used in campus teaching.
In teaching process, the centre of blackboard uses maximum places, blackboard top and bottom infrequently use due to the line-of-sight problems of the inconvenience of writing or student, and during use projector equipment, projection screen more will block a blackboard part, cause the originally just smaller utilizable area of blackboard fewer like this, when written contents is more, book complete for the content of courses cannot be write on the blackboard.There is following problem in this teaching means: 1, projection screen has sheltered from part blackboard in the implementation process of classroom, time when serving as a teacher writing on the blackboard in order to allow the classmate of left and right can both see writing on the blackboard clearly, needs risen by projection screen and close projector; When needs viewing instructional media, again projection screen declined and open projector; This process occupies limited time in classroom, have impact on teaching efficiency, reduces classroom teaching efficiency.2, be a teacher in order to writing on the blackboard, after being retracted by projection screen, classmates can not watch teaching projection.3, because projection screen size is limited, and present classroom is all larger, for very inconvenient during viewing multimedia the classmate being sitting in front-seat both sides, classroom.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of Mobile multimedia tutoring system is provided.Projection screen and projector are arranged to packaged type by this system, when blackboard be projected screen cover cannot effectively use or the viewing visual angle of projection screen is not good time, adjustable projection screen makes it move to suitable angle from trend side, the effective usable floor area of blackboard is maximized, to realize the instructional function of blackboard, and ensure that classmates watch the optimum efficiency of black board teaching and multimedia teaching; When only needing projection screen aided education, quickly and easily projection screen can be adjusted back to original place again.
Object of the present invention is achieved through the following technical solutions: a kind of Mobile multimedia tutoring system, it comprises computing machine, removable projection screen subsystem and removable projector sub-system, described removable projection screen subsystem comprises projection screen, actuating unit A, guide rail A and guide rail B, described actuating unit A, guide rail A and guide rail B is all fixed on wall, guide rail A is parallel to blackboard and installs, guide rail B is in the side of guide rail A, guide rail B tilts to install relative to guide rail A, the two ends of projection screen are slidably arranged on guide rail A and guide rail B respectively, projection screen is also connected with actuating unit A, under the driving of actuating unit A, projection screen slides on guide rail A and guide rail B, described removable projector sub-system comprises projector and actuating unit B, removable projector sub-system is fixing on the ceiling, projector is fixed on the output terminal of actuating unit B, actuating unit B drives projector to rotate, make projector and projection screen just right, described computing machine is control linkage actuating unit A respectively, actuating unit B and projector.
Between guide rail B and guide rail A, certain angle is set, projection screen can be made to shift to the side in religion classroom and rotate to an angle.Such one side decreases projection screen blocking blackboard, makes blackboard utilize area to maximize, and is convenient to watch the content on teaching board content and projection screen simultaneously; On the other hand, projection screen rotates to an angle, and being convenient to the front-seat classmate in classroom has best viewing visual angle when watching projection screen, and guide rail B and guide rail A corner dimension can be decided according to the actual requirements.While projection screen rotates, projector is also along with rotating to an angle, and makes projector and projection screen just right, ensures drop shadow effect.When considering that projection screen moves, classmates also can be allowed to see teaching projection clearly, projection screen translational speed can not be too fast, and speed can be controlled in below 10mm/s.
Preferably, described actuating unit A comprises stepper motor A, bearing A, synchronizing jugged belt wheel, synchronous cog belt and pedestal, described pedestal is fixed on wall, stepper motor A and bearing A is all fixed on pedestal, bearing A is arranged on the output terminal of stepper motor A, and synchronizing jugged belt wheel coordinates with bearing A to be installed, and synchronous cog belt cooperation is arranged on synchronizing jugged belt wheel, projection screen is fixedly connected on synchronous cog belt, described computing machine control linkage stepper motor A.Pedestal adopts HT150 cast sheet, and welds channel-section steel thereon, and the installed surface of milling channel-section steel after welding, to ensure the installation accuracy of bearing A.
Compared with traditional V belt translation, Chain conveyer, gear drive, in Synchronous Belt Drives, the workplace of synchronous cog belt has tooth, and the wheel rim surface of synchronizing jugged belt wheel is also provided with corresponding teeth groove, relies on band to transmit with engaging between belt wheel and moves and power, fricton-tight, pretightning force is little, can ensure constant ratio of gear, ensures synchrodrive, and structure is simple, cost is low.Synchronous cog belt usually with wire rope or glass cord for bearing bed (endless belt), neoprene or polyurethane are body, be with thin and light, its intensity is large, and length growth rate is little, easy to use, transmission efficiency is high, in addition, in this programme transmission process, intermediate attachment member is few, improves transmission efficiency further.In the design, transmission speed is low, by the weight of guide rail carrying projection screen, so synchronous cog belt load is extremely low, directly can select finished product.
Preferably, described guide rail A and guide rail B arranges roller, and projection screen is connected with roller with universal hook by Quick connection ring.Guide rail can select wooden sliding door exclusive guideway, the rubber roll that roller uses guide rail supporting.Projection screen has certain rotational angle in moving process, therefore sprung parts selects universal hook, and is connected with the T-Ring of Quick connection ring with projection screen top.Quick connection ring and universal hook material are 304 stainless steels.
Preferably, described actuating unit B comprises stepper motor B, gear shaft A, gear shaft B, bearing B, bearing C, casing and axle bed, described projector is outside equipped with projector framework, projector framework adopts hot rolled steel plate manufacture up and down, surrounding passes through Plate Welding, corner angle bar welds, gear shaft A is connected to the output terminal of stepper motor B, gear shaft B and gear shaft A engaged transmission, one end of gear shaft B is arranged on casing by bearing B, bearing B arranged outside bearing (ball) cover A, bearing (ball) cover A is fixed on casing, the other end of gear shaft B is arranged on bearing (ball) cover B by bearing C, bearing (ball) cover B is fixed on casing, the output terminal of gear shaft B is connected with projector framework by axle bed.Described casing is fixing on the ceiling, and for dust-proof, material adopts HT150; Axle bed adopts HT200 casting, and radial direction gets through hole, is connected by the axle head of bolt with gear shaft B.Because bearing B and bearing C bears axial force and radial force simultaneously, therefore select angular contact ball bearing.
Preferably, described synchronous cog belt is provided with synchronous cog belt cover, projection screen upper end is provided with hook, and projection screen to be overlapped with synchronous cog belt by hook and is connected.
Preferably, described Mobile multimedia tutoring system also comprises telepilot, and described computing machine comprises electric control gear, and electric control gear is for accepting the signal of telepilot and controlling actuating unit A, actuating unit B and projector.Electric control gear, controls stepper motor A, stepper motor B and projector by the reception to infrared signal (telepilot) and travel switch signal etc. for core with 51 single-chip microcomputers.
The present invention has the following advantages:
1, projection screen and projector are arranged to packaged type by the present invention, during use, projection screen and projector rotational angle cooperatively interact, make classmates also can see more writing on the blackboard clearly watching multimedia while, reduce the switching of projection screen and black board teaching pattern, improve the efficiency of teaching in classroom; The classmate of both sides, classroom also can be made better can to watch the content of courses on projection screen simultaneously.
2, system architecture is simple, cost is low, transmission efficiency is high: adopt Synchronous Belt Drives in removable projection screen subsystem, compared with traditional V belt translation, Chain conveyer, gear drive, rely on synchronous cog belt to transmit with engaging between synchronizing jugged belt wheel to move and power, fricton-tight, pretightning force is little, can ensure constant ratio of gear, ensures synchrodrive, structure is simple, and cost is low; And synchronous cog belt usually with wire rope or glass cord for bearing bed (endless belt), neoprene or polyurethane are body, be with thin and light, its intensity is large, and length growth rate is little, easy to use, transmission efficiency is high, in addition, gear train intermediate attachment member is few, improves transmission efficiency further.
Accompanying drawing explanation
Fig. 1 is the structural representation of Mobile multimedia tutoring system of the present invention;
Fig. 2 is the front view of removable projection screen subsystem in the present invention;
Fig. 3 is the vertical view of removable projection screen subsystem in the present invention;
Fig. 4 is the partial sectional view of removable projector sub-system in the present invention;
Fig. 5 is the classroom planar structure schematic diagram investigated in the specific embodiment of the invention;
Fig. 6 is structural representation when projection screen is in diverse location in the specific embodiment of the invention;
In figure: 1-computing machine, the removable projection screen subsystem of 2-, 21-projection screen, 211-links up with, 22-actuating unit A, 221-stepper motor A, 222-bearing A, the synchronizing jugged belt wheel of 223-, 224-synchronous cog belt, 225-pedestal, 226-synchronous cog belt cover, 23-guide rail A, 24-guide rail B, 25-roller, 26-Quick connection ring, the universal hook of 27-, the removable projector sub-system of 3-, 31-projector, 311-projector framework, 32-actuating unit B, 321-stepper motor B, 322-gear shaft A, 323-gear shaft B, 324-bearing B, 325-bearing C, 326-casing, 327-axle bed, 328-bearing (ball) cover A, 329-bearing (ball) cover B, 4-blackboard, 5-dais, 6-first row seat, 7-door, the left wall of 8-, the right wall of 9-, the right wall of a-is apart from the distance of blackboard, the width of b-door, the length of c-blackboard, the width of d-projection screen, e-projector is apart from the distance of projection screen, f-dais is apart from the distance at first row seat, g-projection screen is apart from first row seat distances, the distance of h-left wall distance blackboard, the length in l-classroom, the width in m-classroom.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1 to 4, a kind of Mobile multimedia tutoring system, it comprises computing machine 1, removable projection screen subsystem 2, removable projector sub-system 3 and telepilot.
Described removable projection screen subsystem 2 comprises projection screen 21, actuating unit A22, guide rail A23 and guide rail B24, described actuating unit A22, guide rail A23 and guide rail B24 are all fixed on wall, guide rail A23 is parallel to blackboard 4 and installs, guide rail B24 is in the side of guide rail A23, guide rail B24 tilts to install relative to guide rail A23, described guide rail A23 and guide rail B24 arranges roller 25, and projection screen 21 is connected with roller 25 with universal hook 27 by Quick connection ring 26.Quick connection ring 26 and universal hook 27 material are 304 stainless steels.Projection screen 21 is also connected with actuating unit A22, and under the driving of actuating unit A22, projection screen 21 slides and rotates to an angle on guide rail A23 and guide rail B24.
Between guide rail B24 and guide rail A23, certain angle is set, projection screen 21 can be made to shift to the side in religion classroom and rotate to an angle.Such one side decreases blocking of projection screen 21 pairs of blackboards 4, makes blackboard 4 utilize area to maximize, and is convenient to watch the content on teaching board content and projection screen 21 simultaneously; On the other hand, projection screen 21 rotates to an angle, and being convenient to the front-seat classmate in classroom has best viewing visual angle when watching projection screen 21.When considering that projection screen 21 moves, classmates also can be allowed to see teaching projection clearly, projection screen 21 translational speed can not be too fast, and speed can be controlled in below 10mm/s.
For determining the position of projection screen 21 movement, carried out gathering investigation to classroom design size between many, Fig. 5 is the classroom planar structure schematic diagram gathering investigation, and table 1 is classroom design size.Wherein Room 5113 are classrooms that after use Mobile multimedia tutoring system, effect is best.This embodiment determines the best shift position of projection screen 21 for 5113 classrooms, in Fig. 6, dotted line is the best shift position of the size mapping gained projection screen 21 according to 5113 classrooms, show that the angle of guide rail B24 and guide rail A23 is 11 ° according to reality mapping.
Table 1 classroom design size
As shown in Figures 2 and 3, described actuating unit A22 comprises stepper motor A221, bearing A222, synchronizing jugged belt wheel 223, synchronous cog belt 224 and pedestal 225, described pedestal 225 is fixed on wall, stepper motor A221 and bearing A222 is all fixed on pedestal 225, bearing A222 is arranged on the output terminal of stepper motor A221, synchronizing jugged belt wheel 223 coordinates with bearing A222 to be installed, synchronous cog belt 224 cooperation is arranged on synchronizing jugged belt wheel 223, synchronous cog belt 224 is provided with synchronous cog belt cover 226, projection screen 21 upper end is provided with hook 211, projection screen 21 overlaps 226 by hook 211 with synchronous cog belt and is connected.Pedestal 225 adopts HT150 cast sheet, and welds channel-section steel thereon, and the installed surface of milling channel-section steel after welding, to ensure the installation accuracy of bearing A222.
As shown in Figure 4, described removable projector sub-system 3 comprises projector 31 and actuating unit B32, and projector 31 is fixed on the output terminal of actuating unit B32, and actuating unit B32 drives projector 31 to rotate, and makes projector 31 and projection screen 21 just right.Removable projector sub-system 3 is fixed on the ceiling in classroom.
Described actuating unit B32 comprises stepper motor B321, gear shaft A322, gear shaft B323, bearing B324, bearing C325, casing 326 and axle bed 327, described projector 31 is outside equipped with projector framework 311, described casing 326 is fixing on the ceiling, gear shaft A322 is connected to the output terminal of stepper motor B321, gear shaft B323 and gear shaft A322 engaged transmission, one end of gear shaft B323 is arranged on casing 326 by bearing B324, bearing B324 arranged outside bearing (ball) cover A328, bearing (ball) cover A328 is fixed on casing 326, the other end of gear shaft B324 is arranged on bearing (ball) cover B329 by bearing C325, bearing (ball) cover B329 is fixed on casing 326, the output terminal of gear shaft B323 is connected with projector framework 311 by axle bed 327.Projector framework about 311 adopts hot rolled steel plate manufacture, and surrounding is by Plate Welding, and corner angle bar welds; Casing 326 is for dust-proof, and material adopts HT150; Axle bed 327 adopts HT200 to cast, and radial direction gets through hole, is connected by the axle head of bolt with gear shaft B323.Bearing B324 and bearing C325 is angular contact ball bearing.
Described computing machine 1 comprises electric control gear, and electric control gear is for accepting the signal of telepilot and control step motor A221, stepper motor B321 and projector 31.
When concrete use is of the present invention, when needs watch blackboard 4 writing on the blackboard and projection screen 21 simultaneously, projection screen 21 can be moved to blackboard 4 side, reduce blocking of projection screen 21 pairs of blackboards 4, make blackboard 4 utilize area to maximize, be convenient to watch the content on teaching board content and projection screen 21 simultaneously; When only needing to watch the content on projection screen 21, projection screen 21 can be moved to the position parallel with blackboard 4.
Claims (6)
1. a Mobile multimedia tutoring system, it is characterized in that: it comprises computing machine (1), removable projection screen subsystem (2) and removable projector sub-system (3), described removable projection screen subsystem (2) comprises projection screen (21), actuating unit A(22), guide rail A(23) and guide rail B(24), described actuating unit A(22), guide rail A(23) and guide rail B(24) be all fixed on wall, guide rail A(23) be parallel to blackboard (4) installation, guide rail B(24) at guide rail A(23) side, guide rail B(24) relative to guide rail A(23) tilt to install, the two ends of projection screen (21) are slidably arranged in guide rail A(23 respectively) and guide rail B(24) on, projection screen (21) also with actuating unit A(22) be connected, at actuating unit A(22) driving under projection screen (21) at guide rail A(23) and guide rail B(24) upper to slide, described removable projector sub-system (3) comprises projector (31) and actuating unit B(32), projector (31) is fixed on actuating unit B(32) output terminal, actuating unit B(32) drive projector (31) to rotate, make projector (31) and projection screen (21) just right, described computing machine (1) is control linkage actuating unit A(22 respectively), actuating unit B(32) and projector (31).
2. a kind of Mobile multimedia tutoring system according to claim 1, it is characterized in that: described actuating unit A(22) comprise stepper motor A(221), bearing A(222), synchronizing jugged belt wheel (223), synchronous cog belt (224) and pedestal (225), described pedestal (225) is fixed on wall, stepper motor A(221) and bearing A(222) be all fixed on pedestal (225), bearing A(222) be arranged on stepper motor A(221) output terminal, synchronizing jugged belt wheel (223) and bearing A(222) coordinate and install, synchronous cog belt (224) cooperation is arranged on synchronizing jugged belt wheel (223), projection screen (21) is fixedly connected on synchronous cog belt (224), described computing machine (1) control linkage stepper motor A(221).
3. a kind of Mobile multimedia tutoring system according to claim 1, it is characterized in that: described guide rail A(23) and guide rail B(24) on roller (25) is set, projection screen (21) is connected with roller (25) with universal hook (27) by Quick connection ring (26).
4. a kind of Mobile multimedia tutoring system according to claim 1, it is characterized in that: described actuating unit B(32) comprise stepper motor B(321), gear shaft A(322), gear shaft B(323), bearing B(324), bearing C(325), casing (326) and axle bed (327), described projector (31) is outside equipped with projector framework (311), described casing (326) is fixed on wall, gear shaft A(322) be connected to stepper motor B(321) output terminal, gear shaft B(323) and gear shaft A(322) engaged transmission, gear shaft B(323) one end by bearing B(324) be arranged on casing (326), bearing B(324) arranged outside bearing (ball) cover A(328), bearing (ball) cover A(328) be fixed on casing (326), gear shaft B(324) the other end by bearing C(325) be arranged on bearing (ball) cover B(329) on, bearing (ball) cover B(329) be fixed on casing (326), gear shaft B(323) output terminal be connected with projector framework (311) by axle bed (327).
5. a kind of Mobile multimedia tutoring system according to claim 2, it is characterized in that: described synchronous cog belt (224) is provided with synchronous cog belt cover (226), projection screen (21) upper end is provided with hook (211), and projection screen (21) is connected with synchronous cog belt cover (226) by hook (211).
6. a kind of Mobile multimedia tutoring system according to claim 1 ~ 5 any one, it is characterized in that: described Mobile multimedia tutoring system also comprises telepilot, described computing machine (1) comprises electric control gear, and electric control gear is for accepting the signal of telepilot and controlling actuating unit A(22), actuating unit B(32) and projector (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898322.7A CN105427681B (en) | 2015-12-08 | 2015-12-08 | A kind of Mobile multimedia tutoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898322.7A CN105427681B (en) | 2015-12-08 | 2015-12-08 | A kind of Mobile multimedia tutoring system |
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| CN105427681A true CN105427681A (en) | 2016-03-23 |
| CN105427681B CN105427681B (en) | 2018-06-05 |
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| CN109901348A (en) * | 2019-04-02 | 2019-06-18 | 上海飞来飞去新媒体展示设计有限公司 | A kind of dynamic mechanically curtain projecting method based on key point calibration technique |
| CN111554132A (en) * | 2020-05-18 | 2020-08-18 | 许昌学院 | Multimedia teaching selection projection instrument |
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| Publication number | Publication date |
|---|---|
| CN105427681B (en) | 2018-06-05 |
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