CN202257506U - Electronic whiteboard system using vibration positioning and vibration sensing device - Google Patents
Electronic whiteboard system using vibration positioning and vibration sensing device Download PDFInfo
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- CN202257506U CN202257506U CN2011203743652U CN201120374365U CN202257506U CN 202257506 U CN202257506 U CN 202257506U CN 2011203743652 U CN2011203743652 U CN 2011203743652U CN 201120374365 U CN201120374365 U CN 201120374365U CN 202257506 U CN202257506 U CN 202257506U
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Abstract
The utility model relates to an utilize whiteboard system and vibration sensing device of vibration location, whiteboard system includes: the device comprises a writing pen, a board surface for the writing pen to write, at least three vibration sensing devices which are arranged in contact with the board surface to form at least one triangular monitoring area capable of continuously propagating vibration and used for detecting vibration parameters generated by the writing pen in the triangular monitoring area; and the control processing device is connected with the vibration sensing device to receive the vibration parameters and calculate the relative position coordinates of the writing pen according to the vibration parameters to form a motion track. When the writing pen writes on the board, vibration can be generated on the board, the vibration sensing device detects vibration parameters, the control processing device processes the vibration parameters to form a motion track of the writing pen, and the motion track is displayed through the board or the track display device.
Description
Technical Field
The present invention relates to a vibration positioning technology, and more particularly, to an electronic whiteboard system and a vibration sensing device thereof using vibration positioning.
Background
The traditional blackboard can not meet the requirement of electronization, and an electronic whiteboard system integrating electronics and software is developed along with the development of science and technology. Present electronic whiteboard systems typically include an electronic board surface, a writing pen, a sensing processing device, and the like. The existing electronic whiteboard generally adopts two forms, one is realized by adopting a pressure sensing principle, and the other is realized by adopting an electromagnetic induction principle.
The electronic whiteboard adopting the pressure sensing principle is internally provided with two layers of pressure sensing films, when a certain point of the electronic board surface is pressed, the two layers of films cause short circuit at the point, a controller of the electronic whiteboard detects the coordinate value (the position touched by a finger or a writing pen) of the pressed point, the coordinate value is sent to a sensing processing device through a communication interface, and the coordinate value is displayed on the electronic board surface after being processed. The electronic whiteboard system with the structure needs to specially manufacture an electronic board surface, is provided with two layers of pressure membranes to realize pressure sensing, needs to manufacture a special electronic whiteboard, and has complex structure and high cost. Moreover, when the pressure membrane is damaged, it needs to be replaced as a whole, increasing maintenance costs.
The electronic whiteboard adopting the electromagnetic induction principle is internally provided with a digital board, and the writing pen adopts an electromagnetic pen. The induction coil in by the several board produces magnetic field, when the electromagnetic pen is close electronic whiteboard, there is magnetic field to pass through in the induction coil in the writing pen, after the writing pen sensed the magnetic field of several board, resonance circuit wherein produces magnetic field, interact with the magnetic field on the several board again, magnetic field on the several board will change, the position that the writing pen removed can be judged through the change that detects magnetic field on the several board to the sensing processing apparatus, and then through handling in order to produce coordinate information, rethread electronic whiteboard shows, thereby realize utilizing the writing pen to write on electronic whiteboard. The electronic whiteboard system with the structure also needs a specially-made electronic board surface and a special electronic whiteboard, and has complex structure and high cost. Moreover, a special writing pen is needed to be used in cooperation, so that the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an utilize writing pen to write and produce the vibration on the face and fix a position the whiteboard system of writing the handwriting.
Another technical problem to be solved by the present invention is to provide a vibration sensing device for use in an electronic whiteboard system, which uses a writing pen to write on a board to generate vibration to position writing handwriting.
The utility model provides a technical scheme that its technical problem adopted is: an electronic whiteboard system using vibration positioning is constructed, including: the writing board comprises a writing pen and a board surface for the writing pen to write; the system further comprises:
at least three vibration sensing devices which are in contact with the board surface to form at least one triangular monitoring area capable of continuously transmitting vibration and detect vibration parameters generated by the writing pen in the triangular monitoring area; and
and the control processing device is connected with the vibration sensing device and used for receiving the vibration parameters and calculating to obtain the relative position coordinates of the writing pen according to the vibration parameters to form a motion track.
In the electronic whiteboard system of the present invention, the board surface is a display screen connected to the control processing device and displaying the movement track; or,
the electronic whiteboard system further comprises a track display device which is connected with the control processing device and displays the motion track, and the board surface is a blackboard or a glass board surface.
In the electronic whiteboard system of the present invention, each of the vibration sensing devices comprises:
the sensing unit is contacted with the board surface to acquire a vibration signal to form a vibration electric signal;
the real-time processing unit is connected with the sensing unit, receives the electric signal and processes the electric signal to obtain vibration parameters;
the storage unit is connected with the real-time processing unit, stores the vibration parameters and stores the ID codes of the vibration sensing devices; and
and the transmitting unit is connected with the real-time processing unit and transmits the vibration parameters together with the ID codes to the control processing device.
In the electronic whiteboard system of the present invention, the sensing unit comprises one or more acceleration sensors and/or gyroscopes; the transmitting unit is a wired transmitting unit or a wireless transmitting unit.
In the electronic whiteboard system of the present invention, the control processing device is disposed in one of the vibration sensing devices or is an independent control processing device, including:
the receiving unit is in communication connection with each sending unit and receives the vibration parameters and the ID codes;
and the control processing unit is connected with the receiving unit and processes the vibration parameters according to the ID codes at the same time to obtain the relative position coordinates of the writing pen and further obtain the motion trail.
In the electronic whiteboard system of the present invention, the control processing unit includes a coordinate calculation module connected to the receiving unit and calculating a relative coordinate point of the writing pen body relative to the origin coordinate in the triangular monitoring area according to the received vibration amplitude value and time value of the vibration parameter by using the characteristics that the longer the distance is, the longer the propagation time is, and the greater the attenuation of the vibration amplitude value is; and
and the identification module is connected with the receiving unit and judges and identifies different writing pens according to the difference of the magnitude, the frequency value and the phase value of the vibration amplitude value of the received vibration parameter.
In the electronic whiteboard system of the present invention, the control processing device further includes a control storage unit for storing the movement locus of the writing pen.
The utility model discloses an among the whiteboard system, the system is still including setting up the absorbing material of the peripheral position department of face.
The utility model also provides a vibration sensing device for whiteboard system, a serial communication port, include:
the sensing unit is contacted with the board surface to acquire vibration signals to form vibration electric signals;
the real-time processing unit is connected with the sensing unit, receives the electric signal and processes the electric signal to obtain vibration parameters;
the storage unit is connected with the real-time processing unit, stores the vibration parameters and stores the ID codes of the vibration sensing devices; and
and the transmitting unit is connected with the real-time processing unit and transmits the vibration parameters together with the ID codes to the control processing device.
In the vibration sensing device of the present invention, the sensing unit, the real-time processing unit, the storage unit, and the transmission unit are disposed in the same sensing device housing; the sensing unit comprises one or more acceleration sensors and/or gyroscopes; the transmitting unit is a wired transmitting unit or a wireless transmitting unit.
Implement the utility model discloses following beneficial effect has: when the writing pen writes on the board, vibration can be generated on the board, the vibration sensing device detects vibration parameters, the control processing device processes the vibration parameters to form a motion track of the writing pen, and the motion track is displayed through the board or the track display device.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic block diagram of one embodiment of an electronic whiteboard system utilizing vibratory positioning in accordance with the present invention;
fig. 2 is a schematic diagram of an electronic whiteboard system of the present invention;
fig. 3 is a schematic view of a usage flow of the electronic whiteboard system of the present invention.
Detailed Description
As shown in fig. 1 and 2, the present invention provides an electronic whiteboard system using vibration positioning. The electronic whiteboard system comprises a writing pen, a board surface 80 for writing by the writing pen, a vibration sensing device, a control processing device and the like. The vibration sensing device 10 is directly mounted on the board 80 of the electronic whiteboard, obtains handwriting by sensing vibration of the board 80, distinguishes different writing pen types and the like, and accordingly avoids using special boards 80, special electronic writing pens and the like, and is simple in structure and practical.
In this embodiment, three or more vibration sensing devices 10 are uniformly distributed on the board 80, so as to form one or more triangular monitoring areas covering the board 80 of the electronic whiteboard. The vibration sensing device 10 is in contact with the board 80, so that a vibration signal of the board 80 can be detected. The center position or other positions of the board surface 80 are set as the origin of coordinates, and are used as the movement reference points of the writing pen.
Each vibration sensing device 10 may include a sensing device housing in which a sensing unit 11, a real-time processing unit 12, a storage unit 13, a transmission unit 14, and the like are disposed. To facilitate concealment of the vibration sensing device 10, the entire sensing device housing may be disposed below the deck 80; of course, the plate may be mounted on the plate 80 or at any other position in contact with the plate 80 as desired.
When the writing pen writes on the board 80, vibration is generated and transmitted outwards through the board 80, and a vibration signal of the board 80 is collected by the sensing unit 11 and converted into a vibration electric signal. The sensing unit 11 may employ one or more acceleration sensors and/or gyroscopes, and may be directly in contact with the board 80, or may be in contact with the board 80 through a sensing device housing, so as to collect a vibration signal from the board 80. For example, the sensing unit 11 is a differential capacitance type force balance acceleration sensor, adopts a differential capacitance structure, converts the acceleration generated by the vibration of the measured board surface 80 into the capacitance change of the capacitor by using the feedback principle, converts the change of the acceleration into a voltage value, and transmits the voltage value to the real-time processing unit 12.
The real-time processing unit 12 is connected to the sensing unit 11, receives the electrical signal from the sensing unit 11, and processes the electrical signal to obtain the vibration parameter. The real-time processing unit 12 may adopt a single chip microcomputer, an MCU, or the like to process the vibrating electrical signal to obtain the vibration parameters. The vibration parameters may include, but are not limited to, vibration amplitude values, time values, frequency values, phase values, and the like. And comparing the time values of the vibration electric signals received by the vibration sensing devices 10 to obtain a time difference value.
The storage unit 13 of the vibration sensing device 10 is connected to the real-time processing unit 12, stores the calculated vibration parameters, and also stores the ID codes of the respective vibration sensing devices 10 themselves, thereby distinguishing each vibration sensing device 10. It is to be understood that the storage unit 13 may employ various storage media.
The real-time processing unit 12 of each vibration sensing device 10 sends out the obtained vibration parameters together with the corresponding ID code stored in the storage unit 13 through the sending unit 14.
The transmitting unit 14 is connected to the real-time processing unit 12, and transmits the vibration parameter and the ID code to the control processing device 30, and may be a wired transmitting unit 14 or a wireless transmitting unit 14.
Further, in order to avoid the radiation of the vibration wave at the peripheral edge of the board 80, a wave-absorbing material 70 may be added at the periphery of the board 80 to absorb the reflected wave or standing wave caused by the vibration, thereby increasing the accuracy and reliability of the positioning calculation.
The control processing device 30 may be a separate device installed separately from the board 80; may also be provided in one of the vibration sensing means 10, thereby reducing the number of devices. The control processing device 30 includes a receiving unit 31 and a control processing unit 32. The receiving unit 31 is communicatively connected to the transmitting unit 14 of each vibration sensing device 10, and receives the vibration parameters and the ID code from the transmitting unit 14. It will be appreciated that the receiving unit 31 may communicate with the transmitting unit 14 via a wired or wireless connection.
It is understood that the receiving unit 31 may be a separate receiver and then transmitted to the control processing unit 32 by wire or wirelessly. When wireless communication connection is adopted, a wireless transceiver can be added, so that the establishment of a wireless network is facilitated.
The control processing unit 32 performs calculation and processing according to the vibration parameters of different ID codes at the same time to obtain the relative position coordinates of the writing pen, and further obtain the motion trajectory of the writing pen.
In the present embodiment, the control processing device 30 is a separate device including a processing device housing in which a receiving unit 31, a control processing unit 32, and the like are provided. The receiving unit 31 is connected to the transmitting unit 14 of each vibration sensing device 10 in a communication manner, receives the vibration parameters and ID codes of all the vibration sensing devices 10, and transmits the vibration parameters and ID codes to the control processing unit 32.
The control processing unit 32 may be a single chip microcomputer, an MCU, or the like, and includes a coordinate calculating module 321, an identifying module 322, or the like. The coordinate calculation module 321 calculates a time difference value according to the time value of each vibration sensing device 10, and calculates a relative coordinate point of the writing pen body relative to the origin coordinate in the triangular monitoring area by using the characteristics that the longer the distance is, the longer the propagation time is, and the greater the attenuation of the vibration amplitude value is, in combination with the vibration amplitude value, so as to obtain the motion trajectory of the writing pen.
In the present embodiment, the board surface 80 is a display screen connected to the control processing unit 32. The control processing unit 32 feeds back the calculated movement locus of the writing pen to the board surface 80, and displays the handwriting on the board surface 80, thereby writing on the board surface 80. It should be understood that the board 80 may be a common blackboard or a glass board 80, and the trajectory display device 40 connected to the control processing device 30 is further provided to display the handwriting obtained by the control processing unit 32. Of course, the writing pen can also use an electromagnetic pen, and the corresponding board surface 80 adopts an electromagnetic display screen, so that writing display can be performed on the board surface 80 through the electromagnetic pen, and handwriting display can be performed on the electromagnetic display screen through the induction principle.
The recognition module 322 is used for determining and recognizing the types of different writing pens. Since the motion characteristics of different pens are different, the magnitude, frequency value and phase value of the vibration amplitude value of the generated vibration wave pattern are different, so that the identification module 322 can determine and identify the types of different pens according to the difference between the magnitude, frequency value and phase value of the detected vibration amplitude value. In this embodiment, the recognition module 322 stores handwriting characteristics corresponding to vibration parameters. The corresponding handwriting characteristics are selected by monitoring the obtained vibration parameters and fed back to the board surface 80 or the trajectory display device 40 to display different handwriting.
For example, when a writing pen with a large pen point is used, the contact area between the pen point and the board surface 80 is large, and a vibration parameter is obtained; when the writing pen with the smaller pen point is used, the basic area of the pen point and the board surface 80 is smaller, another vibration parameter is obtained, so that different writing pens can be distinguished according to the vibration parameter, and then the handwriting characteristic corresponding to the vibration parameter is selected, so that different thicknesses can be used for expression on the track display device 40, for example, the handwriting with the larger vibration amplitude value corresponds to the thicker handwriting, and the handwriting with the smaller vibration amplitude value corresponds to the thinner handwriting. Of course, the selection of the color can also be distinguished according to different vibration parameters, so that the display of different handwriting is realized.
Further, the control processing device can be further provided with a control memory for storing the writing track, so that the written content can be conveniently stored, the recording and the use in the future can be conveniently carried out, and the like.
In using the system, as shown in fig. 3, at least three vibration sensing devices 10 are first provided within the board surface 80 of the electronic whiteboard. The vibration sensing device 10 is installed on the lower side of the board 80 and encloses a triangular monitoring area. When the writing pen moves on the board 80, the board 80 generates vibration and transmits the vibration to the vibration sensing device 10. Further, the origin coordinates are set, for example, the center position or the edge position or other positions of the board surface 80 as the origin coordinates, as the reference points of the detected relative coordinate points of the writing pen.
When the writing pen writes on the board 80, vibration is generated on the board 80 and transmitted through the board 80. The sensing unit 11 of each vibration sensing device 10 respectively collects the vibration signal of the board surface 80 and converts the vibration signal into an electrical signal; the electric signal of the vibration collected by the sensing unit 11 is transmitted to the real-time processing unit 12, and the real-time processing unit 12 processes the electric signal to obtain the vibration parameter. The vibration parameters include vibration amplitude values, time values, frequency values, phase values, and the like. The resulting vibration parameters are transmitted out by the transmitting unit 14, together with the ID code of the vibration sensing device 10 itself.
The control processing device 30 then receives the vibration parameters and calculates the relative position of the writing pen. In the present embodiment, the receiving unit 31 of the control processing device 30 receives the vibration parameters and their corresponding ID codes transmitted from all the vibration sensing devices 10 at the same time.
The control processing unit 32 of the control processing device 30 processes all vibration parameters: calculating to obtain a time difference value according to time values obtained by different vibration sensing devices 10 at the same time, and calculating to obtain a relative coordinate point of the writing pen body relative to an original point coordinate in a triangular monitoring area by combining a vibration amplitude value and utilizing the characteristics that the longer the distance is, the longer the propagation time is and the greater the attenuation of the vibration amplitude value is, so as to obtain a motion track of the writing pen; further, because the vibration characteristics caused by different objects are different, the types of different writing pens are determined and identified by using the difference between the magnitude, frequency value and phase value of the vibration amplitude value detected by different vibration sensing devices 10 at the same time.
Further, the obtained movement trajectory, the type of the writing pen, and the like may be displayed directly on the board 80 or may be displayed on the trajectory display device 40.
In this embodiment, the method further includes a type identification output step: the control processing device 30 stores therein vibration parameters of different types of pens, pen output types corresponding to the vibration parameters, and the like. When the vibration parameters monitored by the control processing device 30 are matched with the stored vibration parameters of the writing pen, the corresponding output type of the writing pen is selected and displayed by the track display device 40.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
Claims (10)
1. An electronic whiteboard system utilizing vibratory positioning, comprising: the writing board comprises a writing pen and a board surface for the writing pen to write; characterized in that, the system also includes:
at least three vibration sensing devices which are in contact with the board surface to form at least one triangular monitoring area capable of continuously transmitting vibration and detect vibration parameters generated by the writing pen in the triangular monitoring area; and
and the control processing device is connected with the vibration sensing device and used for receiving the vibration parameters and calculating to obtain the relative position coordinates of the writing pen according to the vibration parameters to form a motion track.
2. The electronic whiteboard system of claim 1, wherein the board surface is a display screen connected with the control processing device and displaying the motion trail; or,
the electronic whiteboard system further comprises a track display device which is connected with the control processing device and displays the motion track, and the board surface is a blackboard or a glass board surface.
3. The electronic whiteboard system of claim 1, wherein each of the vibration sensing devices comprises:
the sensing unit is contacted with the board surface to acquire a vibration signal to form a vibration electric signal;
the real-time processing unit is connected with the sensing unit, receives the electric signal and processes the electric signal to obtain vibration parameters;
the storage unit is connected with the real-time processing unit, stores the vibration parameters and stores the ID codes of the vibration sensing devices; and
and the transmitting unit is connected with the real-time processing unit and transmits the vibration parameters together with the ID codes to the control processing device.
4. An electronic whiteboard system according to claim 3, wherein the sensing unit comprises one or more acceleration sensors and/or gyroscopes; the transmitting unit is a wired transmitting unit or a wireless transmitting unit.
5. An electronic whiteboard system according to claim 4, wherein the control processing means is provided in one of the vibration sensing means or is a separate control processing means, comprising:
the receiving unit is in communication connection with each sending unit and receives the vibration parameters and the ID codes;
and the control processing unit is connected with the receiving unit and processes the vibration parameters according to the ID codes at the same time to obtain the relative position coordinates of the writing pen and further obtain the motion trail.
6. The electronic whiteboard system of claim 5, wherein the control processing unit comprises a coordinate calculation module connected to the receiving unit, and configured to calculate a relative coordinate point of the writing pen body in the triangular monitoring area with respect to the origin coordinate by using the characteristics that the longer the distance, the longer the propagation time, and the greater the attenuation of the vibration amplitude value, according to the received vibration amplitude value and the time value of the vibration parameter; and
and the identification module is connected with the receiving unit and judges and identifies different writing pens according to the difference of the magnitude, the frequency value and the phase value of the vibration amplitude value of the received vibration parameter.
7. The electronic whiteboard system of claim 5, wherein the control processing device further comprises a control storage unit storing a motion trajectory of the writing pen.
8. The electronic whiteboard system of any of claims 1-7, further comprising a wave-absorbing material disposed at a peripheral location of the board surface.
9. A vibration sensing apparatus for an electronic whiteboard system, comprising:
the sensing unit is contacted with the board surface to acquire vibration signals to form vibration electric signals;
the real-time processing unit is connected with the sensing unit, receives the electric signal and processes the electric signal to obtain vibration parameters;
the storage unit is connected with the real-time processing unit, stores the vibration parameters and stores the ID codes of the vibration sensing devices; and
and the transmitting unit is connected with the real-time processing unit and transmits the vibration parameters together with the ID codes to the control processing device.
10. The vibration sensing device according to claim 9, wherein the sensing unit, the real-time processing unit, the storage unit and the transmitting unit are disposed within the same sensing device housing; the sensing unit comprises one or more acceleration sensors and/or gyroscopes; the transmitting unit is a wired transmitting unit or a wireless transmitting unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203743652U CN202257506U (en) | 2011-09-30 | 2011-09-30 | Electronic whiteboard system using vibration positioning and vibration sensing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203743652U CN202257506U (en) | 2011-09-30 | 2011-09-30 | Electronic whiteboard system using vibration positioning and vibration sensing device |
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| CN202257506U true CN202257506U (en) | 2012-05-30 |
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| CN2011203743652U Expired - Fee Related CN202257506U (en) | 2011-09-30 | 2011-09-30 | Electronic whiteboard system using vibration positioning and vibration sensing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223250A (en) * | 2013-04-23 | 2013-07-31 | 深圳市宇恒互动科技开发有限公司 | Magic wand, marking device and method and system for identifying and searching object |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223250A (en) * | 2013-04-23 | 2013-07-31 | 深圳市宇恒互动科技开发有限公司 | Magic wand, marking device and method and system for identifying and searching object |
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Owner name: SHENZHEN U-COMM INTERACTIVE TECHNOLOGY DEVELOPMENT Free format text: FORMER NAME: SHENZHEN HEZHI CHUANGYING ELECTRONICS CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong, Futian District Meilin Road, No. three, blue sky, green homes are attached to the third floor of the building Patentee after: Shenzhen Yuheng Interactive Technology Development Co., Ltd. Address before: 518000 Guangdong, Futian District Meilin Road, No. three, blue sky, green homes are attached to the third floor of the building Patentee before: Shenzhen Hezhi Chuangying Electronic Co., Ltd. |
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Granted publication date: 20120530 Termination date: 20180930 |