CN201091004Y - Interactive electronic white board - Google Patents
Interactive electronic white board Download PDFInfo
- Publication number
- CN201091004Y CN201091004Y CNU2007201145018U CN200720114501U CN201091004Y CN 201091004 Y CN201091004 Y CN 201091004Y CN U2007201145018 U CNU2007201145018 U CN U2007201145018U CN 200720114501 U CN200720114501 U CN 200720114501U CN 201091004 Y CN201091004 Y CN 201091004Y
- Authority
- CN
- China
- Prior art keywords
- infrared
- whiteboard
- blank matrix
- matrix
- camera head
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses an interactive electronic whiteboard, including a whiteboard matrix, a computer, a projector infrared signal emitting pen which are matched with the whiteboard matrix, and a plurality of infrared emitting devices and imaging devices which are arranged on the each side edge of the whiteboard matrix, wherein, the imaging devices are connected with the computer through a video capture card. The utility model is characterized in that 1, the whiteboard matrix is usually a plate- shaped object, which is low in cost, with the size determined by the actual requirement; 2, the infrared emitting pen is not contacted with the whiteboard directly, so that the writing is fast in speed and easy; 3, with accurate positioning and high writing recognition rate, the writing track can be responded accurately; 4, if an infrared LED on each side edge is kept to work normally, the electronic whiteboard can work normally; the damaged infrared LED can be replaced immediately without stopping work, so as to ensure that the work of the interactive electronic whiteboard has high stability and reliability.
Description
[affiliated technical field]
The utility model relates to a kind of electronic whiteboard device, relates in particular to a kind of interactive electric whiteboard of accurate positioning.
[background technology]
Electronic whiteboards such as on the International or National market of present stage, that representative electronic whiteboard has is induction, infrared-type, resistance-type, ultrasonic type.Wherein, induction electronic whiteboard comprises that pen that substrate, one can launching electromagnetic waves and horizontal vertical both direction are arranged in the receiving coil film on the substrate, and the size of film is identical with the viewing area on the substrate.The shortcoming of this electronic whiteboard is: the easy scuffing, in case middle the appearance scratches, entire plate just may be scrapped, and again because of receiving coil film cost height, thereby the demonstration space of a whole page of making overlarge area is more unrealistic, makes troubles to use.The infrared-type electronic whiteboard comprises: substrate, the infrared reception/emission around gathering in the substrate viewing area are to managing.Its principle of work is: the scanning grid that pipe is formed horizontal/by infrared reception/emission, live in the grid certain to level during as the object blocks that can stop infrared light with vertical infrared scan line, just can determine X by the level that is blocked and the infrared ray position of vertical direction, the Y coordinate, the location of realizing coordinate.Its shortcoming is: be subjected to the influence of strong infrared light easily, bearing accuracy is not high.The ultrasonic type electronic whiteboard comprises substrate, is positioned over substrate two ultrasonic receiving traps that distribute by fixed range on one side, and hyperacoustic pen with means for holding it in right position of emission, its principle of work is: when pen moves substrate surperficial, receiver detects its ultrasonic waves transmitted, by receiving that hyperacoustic time converses the pen and the distance of two receivers.Its shortcoming is: temperature influence is bigger, and setting accuracy is inhomogeneous.Resistance membrane type electronic whiteboard comprises substrate, the combined films that combines by horizontal resistive film, insulation grid, conducting film, insulation grid, vertical resistor film successively provided thereon, and combined films is identical with the viewing area size, the test circuit that is electrically connected with conducting film.Its principle of work is: add a fixing voltage on the horizontal/vertical resistive film, do not having under the external force effect, conducting film is the contact resistance film not, does not have voltage to be recorded, and can not produce the information response of location; When firmly touching certain of resistive film with lettering pen or finger when a bit, electric current reads by the tested circuit of conducting film, by the level that reads and two voltages of vertical direction, converses the X of touch point, Y direction position, the location of realization coordinate.Its shortcoming is: it is more painstaking to write, and when dynamics is not enough, writing will can not show, thereby need firmly write, thereby cause writing speed slower, in addition, scratch easily, and in case scuffing is arranged, just can not use, in addition, because the cost of manufacture height, the electronic whiteboard of making overlarge area is more unrealistic.
[summary of the invention]
The utility model purpose is to provide a kind of signal emission pen not directly and substrate contacts, accurate positioning, interactive electric whiteboard that cost is low, the substrate that solves the prior art existence is the specific complex plate, damage, use cost height are influenced greatly by extraneous factor easily, problems such as location out of true.
Above-mentioned technical purpose of the present utility model mainly is a kind of interactive electric whiteboard that solves by the following technical programs, comprise the blank matrix, the computing machine and the projector that cooperate with described blank matrix, it is characterized in that also comprising the infrared signal emission pen that cooperates with described blank matrix, the every side that is arranged on described blank matrix is along last a plurality of infrared launchers and camera head, and described camera head is connected by video frequency collection card with computing machine.The blank matrix can be general tabular object (in actual use, can directly adopt traditional blackboard), can be according to actual needs, its size is changeable, when the blank matrix hour, written handwriting can be projected on the plane of other objects of larger area.When on the blank matrix, there not being pen (this moment, pen was not launched infrared signal) when writing, what each camera photographed is the white bright spot video image of several fixedly infrared launcher emissions, when writing (pen emission this moment infrared signal) with pen, the infrared CCD camera will photograph a white bright spot (infrared signal on the pen causes) at fixed background (fixedly the light that sends of the infrared launcher causes) video image of motion down, be transferred in the computing machine by video frequency collection card.By two two field pictures before and after each moment are subtracted each other, utilize computer image processing technology we just can obtain the handwriting trace image of motion bright spot under the situation of removing background information, at last this handwriting trace curve is drawn in the relevant position of computer screen, and project to the output demonstration that realizes written contents on the electronic whiteboard by projector.
As the further of technique scheme improved and replenish, the utility model adopts following technical measures:
The every side of described blank matrix is at least one along last infrared launcher and camera head.When the infrared launcher at every side blank matrix edge is two or more, can be separately positioned on the both sides of camera head, also can be arranged on a side of camera head.
The every side of described blank matrix is one along last camera head, it is arranged on the middle part at this edge, every side of described blank matrix is along being provided with at least two described infrared launchers, and described infrared launcher is separately positioned on the both sides of corresponding camera head.When the infrared launcher at every side blank matrix edge is two or more, its purpose is to guarantee that there is stable background information all the time in electronic whiteboard, when the one or more damage in the infrared launcher at every side blank matrix edge, as long as there is an infrared launcher operate as normal to meet the demands, at this moment, in time changing the infrared launcher that damages under the situation of guaranteeing the electronic whiteboard operate as normal gets final product.
Described infrared launcher is a LED infraluminescence diode, and described camera head is the infrared CCD camera.
The nib of described signal emission pen is provided with LED infraluminescence diode, also is provided with the switch of control LED infraluminescence diode on this.
The beneficial effect that the utlity model has: 1, the blank matrix can be general tabular object, the cost of having guaranteed this interactive electric whiteboard is lower, simultaneously, its size can be decided according to the actual requirements, meet the different needs, when size is big, can directly handwriting trace be projected on this blank matrix, when size hour, written handwriting can be projected on the plane of other objects of larger area; 2, infrared signal emission pen does not directly contact with the blank matrix, makes writing speed fast and light; 3, intersect the principle that straight line has only an intersection point by two, can react the particular location of light on the blank matrix that infrared signal emission pen is launched accurately, the discrimination height is write in accurate positioning, energy accurate response handwriting trace; 4, every side of blank matrix is provided with two LED infraluminescence diodes at least, as long as guarantee every side a LED infraluminescence diode operate as normal is arranged, electronic whiteboard is the energy operate as normal just, simultaneously, can be under the state of electronic whiteboard work, in time change the LED infraluminescence diode that damages, guaranteed that the work of this interactive electric whiteboard has advantages of higher stability, reliability.
[description of drawings]
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is the left TV structure synoptic diagram of Fig. 1;
Fig. 3 is a kind of structural representation of the signal emission pen in the utility model;
Fig. 4 is a kind of principle Analysis synoptic diagram of the present utility model.
Among the figure: 1. the blank matrix, 2. signal emission pen, 3. computing machine, 4. infrared launcher, 5. camera head, 6. video frequency collection card, 7. switch, 8.LED infraluminescence diode, 9. curve, 10. curve, 11. irradiation positions, 12. picture points, 13. picture points, 14. picture points, 15. picture points, 16. imaging planes, 17. imaging planes, 18. projector,
[embodiment]
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of interactive electric whiteboard, as depicted in figs. 1 and 2, it comprises blank matrix 1, the computing machine 3 and the projector 18 that cooperate with described blank matrix, the signal emission pen 2 that cooperates with described blank matrix 1, the every side that is arranged on blank matrix 1 is along last infrared launcher 4 and camera head 5, and camera head 5 is connected by video frequency collection card 6 with computing machine 3.Blank matrix 1 every side is one along last camera head 5, and it is arranged on the middle part at this edge, and every side of blank matrix 1 is along being provided with two infrared launchers 4, and this two infrared launcher 4 is separately positioned on the both sides of corresponding camera head 5.Infrared launcher 4 is a LED infraluminescence diode, and described camera head 5 is the infrared CCD camera, and it aims at the viewing area.The nib of signal emission pen 2 is provided with LED infraluminescence diode 8, also is provided with the switch 7 of control LED infraluminescence diode 8 on this, as shown in Figure 3.
Computing machine 3 constantly collects four infrared CCD cameras, 5 captured video images in the computing machine 3 with per second 25 frames by a video frequency collection card 6 and handles (as shown in Figure 1).When not having signal emission pen 2 writing in the viewing area on the blank matrix (the LED infrarede emitting diode 8 on the pen does not work at this moment), what each infrared CCD camera photographed is the white bright spot video image that several fixed L ED infrarede emitting diodes 4 send; When writing (the LED infrarede emitting diode 8 on the pen is bright at this moment) with signal emission pen 2, four infrared CCD cameras 5 will photograph the video image that a white bright spot (light that the LED infrarede emitting diode 8 on the pen sends causes) is moved down at fixed background (light that fixed L ED infrarede emitting diode 4 sends causes), two two field pictures before and after each moment are subtracted each other, utilize computer image processing technology, we just can obtain the handwriting trace image of motion bright spot under the situation of removing background information, carry out the location of handwriting trace simultaneously by background information, at last this handwriting trace curve is drawn in the relevant position of computer screen, and project to the output demonstration that realizes written contents on the blank matrix by projector.The blank matrix can be general tabular object (in actual use, can directly adopt traditional blackboard), can be according to actual needs, and its size is changeable.
The principle of work of this interactive electric whiteboard is analyzed in conjunction with Fig. 4, makes a concrete analysis of as follows:
Calculate the coordinate of the irradiation position 11 of light on the blank matrix that nib LED infrarede emitting diode 8 sends, as long as obtain the joining coordinate figure of straight line 9 and straight line 10.Because fixing LED infrarede emitting diode 4 is a and b to the distance of corresponding CCD camera 5, the length of electronic whiteboard is that L, width are H, and the focal length e of CCD camera (value of e is blank matrix 1 to the imaging plane 16 of CCD camera 5 and 17 distance), be known.Then according to formula: (b * e)/L can calculate the t value of imaging point 12 to t=, the r=t+ of imaging point B (distance between imaging point 12, the picture point 13), because the e value is known, so it is known that the horizontal stroke of imaging point 13, ordinate are, horizontal stroke, the ordinate of the CCD camera central point of fixed position are definite value simultaneously, so, just can determine the straight line 9 of the central point of the CCD camera 5 by imaging point 13, fixed position.In like manner can calculate straight line 10, the intersecting point coordinate value that calculates straight line 9, straight line 10 at last is horizontal stroke, the ordinate value of nib position.
Protection domain of the present utility model is not limited to the foregoing description, and all technology contents identical with the technical solution of the utility model or that be equal to fall in its protection domain.
Claims (5)
1. interactive electric whiteboard, comprise blank matrix (1), computing machine (3) that cooperates with described blank matrix and projector (18), it is characterized in that also comprising the infrared signal emission pen (2) that cooperates with described blank matrix (1), the every side that is arranged on described blank matrix (1) is along last infrared launcher (4) and camera head (5), and described camera head (5) is connected by video frequency collection card (6) with computing machine (3).
2. a kind of interactive electric whiteboard according to claim 1 is characterized in that the every side of described blank matrix (1) is at least one along last infrared launcher (4) and camera head (5).
3. a kind of interactive electric whiteboard according to claim 2, it is characterized in that the every side of described blank matrix (1) is one along last camera head (5), it is arranged on the middle part at this edge, every side of described blank matrix (1) is along being provided with at least two described infrared launchers (4), and described infrared launcher (4) is separately positioned on the both sides of corresponding camera head (5).
4. according to claim 1 or 2 or 3 described a kind of interactive electric whiteboards, it is characterized in that described infrared launcher (4) is a LED infraluminescence diode, described camera head (5) is the infrared CCD camera.
5. a kind of interactive electric whiteboard according to claim 4 is characterized in that the nib of described signal emission pen (2) is provided with LED infraluminescence diode (8), also is provided with the switch (7) of control LED infraluminescence diode on this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201145018U CN201091004Y (en) | 2007-09-07 | 2007-09-07 | Interactive electronic white board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201145018U CN201091004Y (en) | 2007-09-07 | 2007-09-07 | Interactive electronic white board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201091004Y true CN201091004Y (en) | 2008-07-23 |
Family
ID=39862762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201145018U Expired - Fee Related CN201091004Y (en) | 2007-09-07 | 2007-09-07 | Interactive electronic white board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201091004Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770259A (en) * | 2009-01-06 | 2010-07-07 | 上海京城高新技术开发有限公司 | Special energy-saving computer of electronic white board |
| CN101923406A (en) * | 2010-07-29 | 2010-12-22 | 信佳数码科技有限公司 | Interactive projection system and method |
| CN103019464A (en) * | 2012-09-24 | 2013-04-03 | 深圳市海亚科技发展有限公司 | Optical sensing electronic whiteboard |
| CN108735019A (en) * | 2018-04-25 | 2018-11-02 | 深圳中兴网信科技有限公司 | Portable interaction teaching device, interaction teaching device control method and device |
-
2007
- 2007-09-07 CN CNU2007201145018U patent/CN201091004Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770259A (en) * | 2009-01-06 | 2010-07-07 | 上海京城高新技术开发有限公司 | Special energy-saving computer of electronic white board |
| CN101923406A (en) * | 2010-07-29 | 2010-12-22 | 信佳数码科技有限公司 | Interactive projection system and method |
| CN103019464A (en) * | 2012-09-24 | 2013-04-03 | 深圳市海亚科技发展有限公司 | Optical sensing electronic whiteboard |
| CN108735019A (en) * | 2018-04-25 | 2018-11-02 | 深圳中兴网信科技有限公司 | Portable interaction teaching device, interaction teaching device control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100501657C (en) | Touch panel device and its locating method | |
| CN101963871A (en) | Optical touch control system based on infrared spotlight recognition and realization method thereof | |
| CN102707817B (en) | Laser inscription system | |
| CN102216890A (en) | Touch input with image sensor and signal processor | |
| CN110300292A (en) | Projection distortion bearing calibration, device, system and storage medium | |
| CN201091004Y (en) | Interactive electronic white board | |
| CN102436327B (en) | Screen input system and implementation method thereof | |
| CN101520700A (en) | Camera-based three-dimensional positioning touch device and positioning method thereof | |
| CN104991684A (en) | Touch control device and working method therefor | |
| US9405385B2 (en) | Interactive projection apparatus and the positioning method of the interactive pen | |
| CN103617642A (en) | Digital painting and writing method and device | |
| CN100478860C (en) | Electronic plane display positioning system and positioning method | |
| CN202632252U (en) | Stable and reliable interactive electronic whiteboard | |
| CN110722903A (en) | Track recording device and track recording method | |
| CN101587404A (en) | Post-positioning device and method based on pick-up head and application thereof | |
| CN204102535U (en) | A kind of outdoor gallery interactive projection device | |
| CN104269126A (en) | Outdoor gallery interactive floor device | |
| CN1326023C (en) | Electronic display system positioning method and positioner thereof | |
| CN105718121A (en) | Optical touch device | |
| CN203012681U (en) | Interactive electronic whiteboard | |
| CN202548758U (en) | Interactive projection system | |
| WO2021120217A1 (en) | Image acquisition apparatus, image acquisition method and acquisition chip | |
| CN111399634B (en) | Method and device for recognizing gesture-guided object | |
| CN205946030U (en) | Cloud board image mosaicking and recording system | |
| CN205507729U (en) | Interactive interactive display screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG SCI-TECH UNIVERSITY Free format text: FORMER OWNER: ZHANG HUAXIONG Effective date: 20120214 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120214 Address after: Zhejiang Sci-Tech University Hangzhou city 310018 Park in Xiasha Higher Education of Zhejiang Province Patentee after: Zhejiang Sci-Tech University Address before: Zhejiang Sci-Tech University Hangzhou city 310018 Park in Xiasha Higher Education of Zhejiang Province Patentee before: Zhang Huaxiong |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20120907 |