CN202939590U - Interactive electronic white board - Google Patents
Interactive electronic white board Download PDFInfo
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- CN202939590U CN202939590U CN 201220546028 CN201220546028U CN202939590U CN 202939590 U CN202939590 U CN 202939590U CN 201220546028 CN201220546028 CN 201220546028 CN 201220546028 U CN201220546028 U CN 201220546028U CN 202939590 U CN202939590 U CN 202939590U
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- electromagnetic induction
- electromotive force
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Abstract
The utility model discloses an interactive electronic white board. The interactive electronic white board comprises an electromagnetic induction input unit and a central processing unit, wherein the electromagnetic induction input unit comprises an electronic touchpen and an electromagnetic induction unit; the electronic touchpen periodically emits alternating electromagnetic waves; the electromagnetic induction unit comprises an induction coil membrane matrix of which the size is the same as that of a display area, and when the electronic touchpen touches the display area, the alternating electromagnetic waves emitted by the electronic touchpen enable the electromagnetic induction unit to produce an induced electromotive force diminishing from the touch point to the periphery; and the central processing unit is used for acquiring the induced electromotive force produced by the electromagnetic induction unit and calculating the maximum induced electromotive force in the vertical direction and the maximum induced electromotive force in the horizontal direction, so as to obtain the positions of both the horizontal ordinate and the vertical ordinate of the touch point in the display area and output a control signal to enable the display area to display the positions. The interactive electronic white board has a simple structure and is accurate in positioning.
Description
Technical field
The utility model relates to a kind of electronic whiteboard device, relates in particular to a kind of interactive electric whiteboard.
Background technology
Interactive electric whiteboard is a kind of advanced person's education or the auxiliary human-computer interaction device of meeting, it has merged placement technology, Large Screen Display Technology, electronic technology and computer technology, can be in audio-visual classroom and the traditional projection screen of the indoor replacement of multimedia conferencing and the function of blackboard/blank.By coordinating of electronic whiteboard and computing machine and projector, explanation person can directly write on project content, paints, modification, note and preservation, and electronic whiteboard can be realized various operations to computing machine as man-machine interface.Most of interactive electric whiteboard is all the resistive film that adopts now, and its complex structure is write the location inaccurate.
The utility model content
The purpose of this utility model is to provide a kind of simple in structure, interactive electric whiteboard of writing accurate positioning.
For achieving the above object, the utility model provides a kind of interactive electric whiteboard, comprising:
The electromagnetic induction input block, it comprises electronic stylus and electromagnetic induction unit, wherein, described electronic stylus is periodically launched the alternating electromagnetism ripple; Described electromagnetic induction unit comprises by several inductive coil films arranges the inductive coil film matrix that forms, the size of inductive coil film matrix is identical with the viewing area, when described electronic stylus touched the viewing area, the alternating electromagnetism ripple that described electronic stylus is launched made electromagnetic induction unit generation by touching the induction electromotive force that a little successively decreases to surrounding;
CPU (central processing unit), be used for obtaining the induction electromotive force of described electromagnetic induction unit generation, therefrom calculate the maximum induction electromotive force of vertical direction and the maximum induction electromotive force of horizontal direction, thereby obtain described touching a little in the horizontal ordinate of described viewing area and ordinate position, and the output control signal makes described viewing area show this position.
Interactive electric whiteboard of the present utility model comprises electromagnetic induction input block and CPU (central processing unit), and the electromagnetic induction input block comprises electronic stylus and electromagnetic induction unit, and electronic stylus is periodically launched the alternating electromagnetism ripple; The electromagnetic induction unit comprises by several inductive coil films arranges the inductive coil film matrix that forms, the size of inductive coil film matrix is identical with the viewing area, when electronic stylus touched the viewing area, the alternating electromagnetism ripple that electronic stylus is launched made electromagnetic induction unit generation by touching the induction electromotive force that a little successively decreases to surrounding; CPU (central processing unit) is used for obtaining the induction electromotive force of electromagnetic induction unit generation, therefrom calculate the maximum induction electromotive force of vertical direction and the maximum induction electromotive force of horizontal direction, thereby obtain to touch a little in the horizontal ordinate of viewing area and ordinate position, and the output control signal makes the viewing area show this position, thereby realized the accurate location of writing, and this equipment is simple in structure.
Description of drawings
Fig. 1 is the structural representation of interactive electric whiteboard of the present utility model;
Fig. 2 is the structural representation of the CPU (central processing unit) of interactive electric whiteboard of the present utility model;
Fig. 3 is the circuit theory diagrams of the electronic stylus of interactive electric whiteboard of the present utility model;
Fig. 4 is the signal amplification unit of interactive electric whiteboard of the present utility model and the circuit theory diagrams of filter processing unit;
Fig. 5 is the circuit theory diagrams of the AD converting unit of interactive electric whiteboard of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail:
With reference to shown in Figure 1, the interactive electric whiteboard of the present embodiment comprises electromagnetic induction input block, CPU (central processing unit), load module selected cell, usb interface unit and storage unit.Wherein, the electromagnetic induction input block comprises electronic stylus and electromagnetic induction unit.Electronic stylus is periodically launched the alternating electromagnetism ripple; The electromagnetic induction unit comprises by several inductive coil films arranges the inductive coil film matrix that forms, the size of inductive coil film matrix is identical with the viewing area, when electronic stylus touched the viewing area, the alternating electromagnetism ripple that electronic stylus is launched made electromagnetic induction unit generation by touching the induction electromotive force that a little successively decreases to surrounding.CPU (central processing unit) is used for obtaining the induction electromotive force of electromagnetic induction unit generation, therefrom calculate the maximum induction electromotive force of vertical direction and the maximum induction electromotive force of horizontal direction, thereby obtain to touch a little in the horizontal ordinate of viewing area and ordinate position, and export control signal and make the viewing area show this position.The load module selected cell is used for obtaining the induction electromotive force of electromagnetic induction unit generation, and will convert the signal that is suitable for central processing unit for processing to.Usb interface unit is for the communication that realizes between CPU (central processing unit) and external unit; Storage unit is used for realizing CPU (central processing unit) reading and write operation data.In conjunction with shown in Figure 2, the load module selected cell comprises signal amplification unit, filter processing unit and the AD converting unit that is connected successively.Wherein, the circuit structure of amplifying unit and filter processing unit as shown in Figure 4, and the circuit structure of AD converting unit is as shown in Figure 5.
in conjunction with shown in Figure 3, electronic stylus comprises that model is the microprocessor chip of ATM EGA48, coil, resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 4, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 12, the first keyswitch SW1 and the second keyswitch SW2, capacitor C 8, capacitor C 9, capacitor C 10 and capacitor C 12 are parallel to the two ends of coil, one end of coil is connected with the 31st pin of microprocessor chip with resistance R 6 by capacitor C 7 successively, the other end of coil is connected with the 30th pin of microprocessor chip, one termination VCC of resistance R 3, the other end of resistance R 3 respectively with the 29th pin of microprocessor chip, one end of resistance R 3, one end of capacitor C 4, one end of resistance R 5 and an end of resistance R 4 are connected, the other end ground connection of capacitor C 4, the other end of resistance R 4 is connected with the 25th pin of microprocessor chip and the second contact of the first keyswitch SW1 respectively, the other end of resistance R 5 is connected with the 23rd pin of microprocessor chip and the second contact of the second keyswitch SW2 respectively, and the 24th pin of microprocessor chip is connected with the first contact of the first keyswitch SW1 and the first contact of the second keyswitch SW2 respectively.When closed or the second keyswitch SW2 was closed without switch motion or the first keyswitch SW1 when electronic stylus, IC1 produced the sinusoidal wave of different frequency and also delivering on coil INDUCTOR, thereby produces periodically alternating magnetic field.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineering technical personnel in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.
Claims (5)
1. an interactive electric whiteboard, is characterized in that, comprising:
The electromagnetic induction input block, it comprises electronic stylus and electromagnetic induction unit, wherein, described electronic stylus is periodically launched the alternating electromagnetism ripple; Described electromagnetic induction unit comprises by several inductive coil films arranges the inductive coil film matrix that forms, the size of inductive coil film matrix is identical with the viewing area, when described electronic stylus touched the viewing area, the alternating electromagnetism ripple that described electronic stylus is launched made electromagnetic induction unit generation by touching the induction electromotive force that a little successively decreases to surrounding;
CPU (central processing unit), be used for obtaining the induction electromotive force of described electromagnetic induction unit generation, therefrom calculate the maximum induction electromotive force of vertical direction and the maximum induction electromotive force of horizontal direction, thereby obtain described touching a little in the horizontal ordinate of described viewing area and ordinate position, and the output control signal makes described viewing area show this position.
2. interactive electric whiteboard according to claim 1, is characterized in that, also comprises:
The load module selected cell is used for obtaining the induction electromotive force of described electromagnetic induction unit generation, and will converts the signal that is suitable for described central processing unit for processing to.
3. interactive electric whiteboard according to claim 2, is characterized in that, described load module selected cell comprises signal amplification unit, filter processing unit and the AD converting unit that is connected successively.
4. interactive electric whiteboard according to claim 3, is characterized in that, described electronic stylus comprises that model is the microprocessor chip of ATMEGA48, coil, resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 4, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 12, the first keyswitch (SW1) and the second keyswitch (SW2), capacitor C 8, capacitor C 9, capacitor C 10 and capacitor C 12 are parallel to the two ends of coil, one end of coil is connected with the 31st pin of described microprocessor chip with resistance R 6 by capacitor C 7 successively, the other end of coil is connected with the 30th pin of described microprocessor chip, one termination VCC of resistance R 3, the other end of resistance R 3 respectively with the 29th pin of described microprocessor chip, one end of resistance R 3, one end of capacitor C 4, one end of resistance R 5 and an end of resistance R 4 are connected, the other end ground connection of capacitor C 4, the other end of resistance R 4 is connected with the 25th pin of described microprocessor chip and the second contact of described the first keyswitch (SW1) respectively, the other end of resistance R 5 is connected with the 23rd pin of described microprocessor chip and the second contact of described the second keyswitch (SW2) respectively, and the 24th pin of described microprocessor chip is connected with the first contact of described the first keyswitch (SW1) and the first contact of described the second keyswitch (SW2) respectively.
5. interactive electric whiteboard according to claim 4, is characterized in that, also comprises:
Usb interface unit is for the communication that realizes between described CPU (central processing unit) and external unit;
Storage unit is used for realizing described CPU (central processing unit) reading and write operation data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220546028 CN202939590U (en) | 2012-10-23 | 2012-10-23 | Interactive electronic white board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220546028 CN202939590U (en) | 2012-10-23 | 2012-10-23 | Interactive electronic white board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939590U true CN202939590U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220546028 Expired - Lifetime CN202939590U (en) | 2012-10-23 | 2012-10-23 | Interactive electronic white board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939590U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049830B (en) * | 2014-06-24 | 2017-07-18 | 北京汉王鹏泰科技有限公司 | For time writer and the exchange method of magnetic board |
| CN113577791A (en) * | 2020-07-15 | 2021-11-02 | 株式会社万代 | Performance output toy |
-
2012
- 2012-10-23 CN CN 201220546028 patent/CN202939590U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049830B (en) * | 2014-06-24 | 2017-07-18 | 北京汉王鹏泰科技有限公司 | For time writer and the exchange method of magnetic board |
| CN113577791A (en) * | 2020-07-15 | 2021-11-02 | 株式会社万代 | Performance output toy |
| CN113577791B (en) * | 2020-07-15 | 2023-11-21 | 株式会社万代 | Performance output toy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
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| CX01 | Expiry of patent term |