CN201876859U - Electronic whiteboard with dual-stylus writing function - Google Patents
Electronic whiteboard with dual-stylus writing function Download PDFInfo
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- CN201876859U CN201876859U CN2010206529618U CN201020652961U CN201876859U CN 201876859 U CN201876859 U CN 201876859U CN 2010206529618 U CN2010206529618 U CN 2010206529618U CN 201020652961 U CN201020652961 U CN 201020652961U CN 201876859 U CN201876859 U CN 201876859U
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Abstract
The utility model provides an electronic whiteboard with a dual-stylus writing function, which comprises a whiteboard body, a core circuit board and two styluses which can send out different-frequency electromagnetic signals, wherein the whiteboard body and the core circuit board are connected with each other. Two signal processing circuits corresponding to the two styluses are arranged on the core circuit board and are connected with a time-sharing circuit. The time-sharing circuit is respectively connected with two signal comparison modules and two pulse detection modules. The two signal comparison modules and the two pulse detection modules are connected with a single-chip microcomputer processing module. The electronic whiteboard has the advantages that two styluses which can send out different-frequency electromagnetic signals are arranged, and two signal processing circuits are arranged, the time-sharing processing is realized through the time-sharing circuit and the two styluses can be used for writing simultaneously, and interactive electronic teaching, interactive meetings, interactive trainings and the like can be realized in a better way.
Description
[technical field]
The utility model relates to a kind of electronic whiteboard, particularly a kind of electronic whiteboard of tool double-pen writing function.
[background technology]
Electronic whiteboard is a newer product, electronic whiteboard is a kind of computer entry device, use a special pen, writing words or graphing in specific zone, it has compiled most advanced and sophisticated electronic technology, the new high-tech product of multiple high-tech means research and development such as software engineering, it is by using electromagnetic induction principle, can be in conjunction with computing machine and projector, realize with no paper office and teaching, it can be write with pen as common blank or blackboard for education are direct, be passed in the computer then and go, with respect to projector, common blank, electronic whiteboard have the advantage of himself.
Present electronic whiteboard is made up of writing pencil, blank plate body and core circuit plate usually, and described blank plate body comprises a writing layer, an inductive layer; The core circuit plate is provided with a signal processing circuit, this signal processing circuit comprises a power module, a signal amplification module, one filter module, a signal adjusting module, a signal comparison module, a pulse detection module, a processor of single chip computer module, a communication module; During use, electronic whiteboard is connected with the USB commentaries on classics serial port connecting wire of passing through of computer.Its principle of work is: writing pencil is write on the writing layer of blank plate body, thereby send electromagnetic wave signal, the blank plate body is transferred on the core circuit plate by inductive layer reception electromagnetic wave signal again and handles, at first the signal amplification module by signal processing circuit carries out the feeble signal amplification, signal after the amplification separates and the impurity elimination ripple through filter module, the separation signal that obtains is carried out independent amplification through signal adjusting module, signal after amplification entering signal comparison module again obtains pulse, handle by the pulse detection module, send into again calculating that the processor of single chip computer module carries out pulse width with and the counting of pulse number finally obtain the accurate coordinates of writing pencil on electronic whiteboard, at last coordinate information is changeed serial port connecting wire by the communication module conversion by USB and sending to computer.
As previously mentioned, present electronic whiteboard causes application more single because the core circuit plate only is provided with a signal processing circuit, and synchronization can only be write by one-pen, can't realize interactive electronic teaching, interactive meeting, training etc. better.
[utility model content]
The technical problems to be solved in the utility model is to provide a kind of electronic whiteboard, is equipped with two lettering pens, and synchronization can be write with two pens, to realize interactive electronic teaching, interactive meeting, training etc. better.
The utility model is achieved in that a kind of electronic whiteboard of tool double-pen writing function, the blank plate body and the core circuit plate that comprise connection, it is characterized in that: also comprise two writing pencils that can send different electromagnetic signal frequencies, and on the described core circuit plate to being provided with two signal processing circuits by two writing pencils, and this two paths of signals treatment circuit all is connected to a time-sharing circuit, this time-sharing circuit connects two paths of signals comparison module and two-way pulse detection module more respectively, and this two paths of signals comparison module is connected a single chip processing module again with two-way pulse detection module.
Described blank plate body comprises a writing layer, an inductive layer; Described arbitrary signal processing circuit comprises a signal amplification module that connects successively, a filter module, a signal adjusting module; Two described signal adjusting module all are connected to described time-sharing circuit; Described writing pencil is connected with described writing layer, and described inductive layer is connected with two described signal amplification modules respectively.
Described electronic whiteboard also comprises a power module that is connected with described single chip processing module and a communication module.
Advantage of the present utility model is: be equipped with two lettering pens that can send different electromagnetic signal frequencies, the two paths of signals treatment circuit is set again, carry out time-division processing by time-sharing circuit, the realization synchronization can be write with two pens, to realize interactive electronic teaching, interactive meeting, training etc. better.
[description of drawings]
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is the structured flowchart of the utility model electronic whiteboard.
Fig. 2 is the circuit theory diagrams of the arbitrary signal processing circuit in the utility model.
Fig. 3 is the signal comparison module in the utility model, the circuit theory diagrams of pulse detection module.
[embodiment]
See also shown in Figure 1ly, electronic whiteboard of the present utility model comprises a blank plate body, a core circuit plate and two writing pencils that can send different electromagnetic signal frequencies of connection.Described blank plate body comprises a writing layer, an inductive layer.On the described core circuit plate to being provided with two signal processing circuits by two writing pencils, and this two paths of signals treatment circuit all is connected to a time-sharing circuit, this time-sharing circuit connects two paths of signals comparison module and two-way pulse detection module more respectively, this two paths of signals comparison module is connected a single chip processing module again with two-way pulse detection module, and described single chip processing module connects a power module and a communication module again.
In conjunction with shown in Figure 2, described arbitrary signal processing circuit comprises a signal amplification module that connects successively, a filter module, a signal adjusting module again; Two described signal adjusting module all are connected to described time-sharing circuit; Described writing pencil is connected with described writing layer, and described inductive layer is connected with two described signal amplification modules respectively.
The function of above-mentioned each ingredient is as follows:
The writing layer of described blank plate body is used for writing of writing pencil; Described inductive layer is used to receive the electromagnetic wave signal that sends when writing pencil is write; As shown in Figure 2, in the described signal processing circuit,
Signal amplification module: be used for the amplification of feeble signal, signal is entered by Z-in, pass through R10 respectively, C6 and R24, two low-pass filters of C14, deliver to U1B respectively again and U3B amplifies in proportion, enlargement factor be respectively (1+R6/R7) with (1+R20/R21), the signal after the amplification enters filter module respectively;
Filter module: the electromagnetic wave signal that can send different frequency owing to two writing pencils respectively, this electromagnetic wave comprises the sine wave signal of 4 different frequency scopes, filter module is used for signal is carried out filtering, two signal processing circuits have two filter modules, it is two bandpass filter, can carry out filtering to different frequency signals, thereby obtain two fully independently signals;
Signal adjusting module: be used for filtered signal is adjusted; The prime of this module all is amplifier U1A in proportion, U3A, enlargement factor be respectively (1+R2/R5) with (1+R16/R19), signal after the amplification merges to be sent among the reverser U5B, afterwards signal is delivered among the operational amplifier U5A, the enlargement factor of this operational amplifier can manual adjustments, and enlargement factor is (VR2/R33).
Again as shown in Figure 3,
Described time-sharing circuit: be used to receive the signal of two signal adjusting module, and carry out time-division processing, send into the signal comparator circuit and the pulse detection module of next stage respectively.
Described signal comparator circuit: the signal Zmix1 through signal adjustment circuit output wherein one the tunnel enters this module, the Zmix1 signal is delivered to the base stage of Q3 triode, through amplifying back output TO, and the control signal LM393_H that Q4 exports by single-chip microcomputer opens or disconnects, and whether control TO signal is input to the positive input terminal of U6A.And Q1, Q2 has constituted the voltage input switch by the control signal LM393_L of single-chip microcomputer output, enters the negative input end of U6A, and U6A compares two paths of signals, obtains the pulse of signal, outputs to 393_OUT.
The pulse detection module: the signal Zmix1 through signal adjustment circuit output wherein one the tunnel enters this module, and the Zmix1 signal carried out zero balancing by U6B and obtains pulse P3.4/T0, obtained the pulsed frequency identical with the frequency of signal.
Single chip processing module: two writing pencils send the electromagnetic wave signal of different frequency, this electromagnetic wave comprises the sine wave signal of 4 different frequency scopes, single chip processing module is used for the pulse signal 393_OUT with two signal comparator circuits, carry out the frequency that step-by-step counting obtains signal by the P3.4/T0 pin, thereby judge the state of two writing pencils, the state of writing pencil is corresponding to the wave frequency of its generation, every writing pencil all has the signal of four kinds of different frequencies, and therefore four kinds of different states are all arranged.That the state that writing pencil is write on blank has respectively is mobile, write, click and and right button, can replace traditional computer mouse function fully;
Power module: the 5V power supply that USB is provided goes high frequency interference filtering and carries out the power supply voltage stabilizing, pure power supply is provided for other modules;
Communication module: be used to connect computer, signal changeed serial port connecting wire by USB send to computer.
Principle of work of the present utility model:
During use, electronic whiteboard of the present utility model is connected with computer, two writing pencils are write at the blank plate body, can write simultaneously, two electromagnetic signal frequency differences that writing pencil sends, separately two paths of signals is handled by time-sharing circuit, obtain corresponding pulse by signal comparator circuit again, this pulse is 393_OUT, single chip processing module compares the pulse signal 393_OUT that obtains that just handle can the relative position of signal calculated on blank, and can obtain the frequency of signal by P3.4/T0, thereby obtains the state whether writing pencil is write, send signal to computer by communication module again, be for further processing by computer.
Claims (3)
1. the electronic whiteboard of a tool double-pen writing function, the blank plate body and the core circuit plate that comprise connection, it is characterized in that: also comprise two writing pencils that can send different electromagnetic signal frequencies, and on the described core circuit plate to being provided with two signal processing circuits by two writing pencils, and this two paths of signals treatment circuit all is connected to a time-sharing circuit, this time-sharing circuit connects two paths of signals comparison module and two-way pulse detection module more respectively, and this two paths of signals comparison module is connected a single chip processing module again with two-way pulse detection module.
2. the electronic whiteboard of a kind of tool double-pen writing function as claimed in claim 1 is characterized in that:
Described blank plate body comprises a writing layer, an inductive layer;
Described arbitrary signal processing circuit comprises a signal amplification module that connects successively, a filter module, a signal adjusting module; Two described signal adjusting module all are connected to described time-sharing circuit;
Described writing pencil is connected with described writing layer, and described inductive layer is connected with two described signal amplification modules respectively.
3. the electronic whiteboard of a kind of tool double-pen writing function as claimed in claim 1 or 2 is characterized in that: also comprise a power module that is connected with described single chip processing module and a communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206529618U CN201876859U (en) | 2010-12-10 | 2010-12-10 | Electronic whiteboard with dual-stylus writing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206529618U CN201876859U (en) | 2010-12-10 | 2010-12-10 | Electronic whiteboard with dual-stylus writing function |
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| Publication Number | Publication Date |
|---|---|
| CN201876859U true CN201876859U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206529618U Expired - Lifetime CN201876859U (en) | 2010-12-10 | 2010-12-10 | Electronic whiteboard with dual-stylus writing function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331897A (en) * | 2011-09-22 | 2012-01-25 | 福州锐达数码科技有限公司 | Electromagnetic induction-type electronic whiteboard system capable of being written by multiple people synchronously |
| CN103207706A (en) * | 2012-01-13 | 2013-07-17 | 南京先能光电科技有限公司 | Double-light pen electronic whiteboard system and light pen identifying method |
| CN104461174A (en) * | 2013-09-18 | 2015-03-25 | 纬创资通股份有限公司 | Optical touch system and optical touch control method |
| US20170242498A1 (en) * | 2016-02-23 | 2017-08-24 | Motorola Mobility Llc | Passive Chopsticks Stylus System for Capacitive Touch Screens |
-
2010
- 2010-12-10 CN CN2010206529618U patent/CN201876859U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331897A (en) * | 2011-09-22 | 2012-01-25 | 福州锐达数码科技有限公司 | Electromagnetic induction-type electronic whiteboard system capable of being written by multiple people synchronously |
| CN102331897B (en) * | 2011-09-22 | 2014-04-09 | 福州锐达数码科技有限公司 | Electromagnetic induction-type electronic whiteboard system capable of being written by multiple people synchronously |
| CN103207706A (en) * | 2012-01-13 | 2013-07-17 | 南京先能光电科技有限公司 | Double-light pen electronic whiteboard system and light pen identifying method |
| CN104461174A (en) * | 2013-09-18 | 2015-03-25 | 纬创资通股份有限公司 | Optical touch system and optical touch control method |
| US20170242498A1 (en) * | 2016-02-23 | 2017-08-24 | Motorola Mobility Llc | Passive Chopsticks Stylus System for Capacitive Touch Screens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Cangshan District of Fuzhou City, Fujian province 350028 to build a new town, Jinshan Road No. 618, juyuanzhou Industrial Park Gulou Park Building No. 8 Patentee after: RETURNSTAR INTERACTIVE TECHNOLOGY GROUP Co.,Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350028 to build a new town, Jinshan Road No. 618, juyuanzhou Industrial Park Gulou Park Building No. 8 Patentee before: Fujian Ruida interactive Polytron Technologies Inc. |
|
| CP03 | Change of name, title or address |
Address after: Cangshan District of Fuzhou City, Fujian province 350028 to build a new town, Jinshan Road No. 618, juyuanzhou Industrial Park Gulou Park Building No. 8 Patentee after: Fujian Ruida interactive Polytron Technologies Inc. Address before: Cangshan District of Fuzhou City, Fujian province 350000 to build a new town, Jinshan Road No. 618, juyuanzhou Industrial Park Gulou Park Building No. 8 Patentee before: Fuzhou Returnstar Technology Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |
Address after: 350028 6, No. 1 Innovation Park, No. 3 east science and technology road, Minhou street, Minhou, Fuzhou. Patentee after: RETURNSTAR INTERACTIVE TECHNOLOGY GROUP Co.,Ltd. Address before: 350028 8 tower building, Orange Garden Industrial Park, 618 Jinshan Road, Jianxin Town, Cangshan District, Fuzhou, Fujian. Patentee before: RETURNSTAR INTERACTIVE TECHNOLOGY GROUP Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |
|
| CX01 | Expiry of patent term |