Touch screen device supporting intelligent switching of teaching pen types

Abstract

The invention provides a touch screen device supporting intelligent switching of teaching pen types, and the device comprises a plurality of teaching pens which are provided with positioning labels, are used for writing on a touch screen, and are also used for transmitting positioning information to a base station; the base station is provided with a positioning information receiver, is arranged around the touch screen and is used for receiving the positioning information sent by the teaching pen and sending the type of the teaching pen close to the touch screen to the touch screen; the touch screen is used for displaying the writing content of the teaching pen; the touch screen comprises a teaching system, and the teaching system switches the handwriting type displayed by the touch screen according to the teaching pen type sent by the base station. The method has the advantages that the real chalk / whiteboard pen use experience is achieved, pens of different colors can be selected, corresponding colors can be written on a whiteboard, and handwriting of different line types and thicknesses can be supported. The use mode better conforms to the WYSIWYG experience, the threshold of using the teaching system is lowered, and the complex operation process of handwriting switching is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of touch screens, and in particular relates to a touch screen device supporting intelligent switching of teaching pen types. Background Art

[0002] The teaching touch screen is a teaching aid. Its large screen and the ability to write directly on the screen make it convenient for teaching staff to display content and for students to view content.

[0003] When teaching staff use a teaching pen to teach writing on a large screen, they often switch handwriting, such as using handwriting of different colors to highlight different teaching contents, using handwriting of different linearity or thickness to draw, etc.

[0004] There are two ways to switch teaching pens currently in use: one is to use software to switch, that is, you need to manually select the type of teaching pen you need to use in the large-screen software to switch the current writing teaching pen; when using software to switch the teaching pen type, you often need to click multiple times in the software toolbar or menu to select the required teaching pen type. Another way is to use a fixed pen holder, and pens of different colors or line types are placed in a fixed position on the pen holder. When the teaching staff picks up a certain pen, the fixed pen holder can sense that the pen has been picked up, and can notify the large-screen software to switch the line type of the currently used teaching pen. The problem with this method is that after using the teaching pen, the teaching staff must put the pen in the corresponding position of the fixed pen holder. Such an operation is too demanding for the teaching staff and is very inconvenient to use. In particular, the large screen and the teaching pen are public items. If a teaching staff places the pen incorrectly, it will affect other teaching staff. Summary of the invention

[0005] The purpose of the present invention is to overcome the defect of complicated operation when switching teaching pens on the existing touch screen device.

[0006] In order to achieve the above object, the present invention proposes a touch screen device that supports intelligent switching of teaching pen types, the device comprising:

[0007] Several teaching pens, equipped with positioning tags, are used to write on the touch screen and also to send positioning information to the base station;

[0008] A base station having a positioning information receiver installed around the touch screen and used to receive the positioning information sent by the teaching pen and send the type of the teaching pen close to the touch screen to the touch screen; and

[0009] A touch screen is used to display the writing content of the teaching pen; the touch screen includes a teaching system, and the teaching system switches the handwriting type displayed on the touch screen according to the teaching pen type sent by the base station.

[0010] As an improvement of the above device, the positioning tag is a UWB positioning tag powered by a battery; and the positioning information receiver is a UWB receiver.

[0011] As an improvement of the above device, the number of the base stations is 2 or more.

[0012] As an improvement of the above device, the handwriting type includes color, line type and / or thickness.

[0013] As an improvement of the above device, the teaching pen has a unique ID value, and the positioning information sent by the teaching pen includes the ID value.

[0014] As an improvement of the above device, the teaching pen has different labels indicating the characteristics of the handwriting according to the different handwritings it represents.

[0015] As an improvement of the above device, the teaching system is also used to obtain the positioning information of the teaching pen to be found through the base station when the teaching staff selects the teaching pen to be found on the touch screen, and display the direction and distance of the teaching pen to be found on the touch screen.

[0016] As an improvement of the above device, the base station is also used to send positioning information of a designated teaching pen to the touch screen according to a request of the teaching system.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The technical solution provided by this application can solve the problem of holding a pen of the corresponding handwriting type, and the touch screen will display the pen of the corresponding handwriting when writing, which is similar to the experience of simulating teachers and other users using real chalk / whiteboard pens. Different colors of pens can be selected to write corresponding colors on the whiteboard, and different line types and thicknesses of handwriting can be supported. The use of this pen is more in line with the intuitive experience of what you see is what you get, which lowers the threshold for users to use the teaching system and reduces the complex operation process such as switching handwriting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic diagram of a touch screen device that supports intelligent switching of teaching pen types. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0021] UWB (UltraWideBand) positioning technology is ultra-wideband technology, which is a carrier-free communication technology. It uses nanosecond non-sinusoidal narrow pulses to transmit data, so the spectrum range it occupies is very wide. Traditional positioning technology determines the position of an object based on the strength of the signal. The strength of the signal is greatly affected by the outside world, so the error between the position of the object located and the actual position is also large, and the positioning accuracy is not high. UWB positioning technology uses broadband pulse communication technology, which has strong anti-interference ability and reduces positioning errors. UWB positioning technology has the advantages of being insensitive to channel fading, low power spectrum density of the transmitted signal, low interception capability, low system complexity, and being able to provide centimeter-level positioning accuracy.

[0022] At present, there are three main positioning methods commonly used for UWB positioning, namely, time difference of arrival positioning method TDOA, time of flight ranging method TOF, and angle of arrival positioning method AOA. The first two can generally be used alone, and the latter AOA is generally integrated with TOF or TDOA for positioning.

[0023] TDOA positioning

[0024] TDOA is based on arrival time difference positioning, and accurate time synchronization function is required in the system.

[0025] There are two types of time synchronization. One is to synchronize time through wires. Wired time synchronization can be controlled within 0.1ns, and the synchronization accuracy is very high. However, due to the use of a central network, either a cascade method is used, which increases the complexity of network maintenance and construction, and the cost is increased. In addition, there is also a dedicated wired time synchronizer in the system, which is expensive. The other is to synchronize time through wireless. Wireless synchronization can generally reach 0.25ns, and the accuracy is slightly lower than that of wired time synchronization, but its system is relatively simpler. The positioning base station only needs power supply, and data can be transmitted back using WIFI, which effectively reduces the cost.

[0026] After the base station time is synchronized, the tag sends a broadcast message. After receiving it, the base station marks the timestamp of receiving the message and sends the content to the computing server. The computing server calculates the position of the located target based on the timestamp of the positioning message from other base stations.

[0027] TOF positioning

[0028] TOF positioning is based on ranging. The tag and each base station that needs to be positioned initiate ranging, and the position is calculated after the ranging is completed.

[0029] In zero-dimensional mode, only one base station needs to be measured for distance; in one-dimensional mode, at least one base station needs to be measured for distance; in two-dimensional mode, at least three or more base stations need to be measured for distance, and in special mode, two base stations can be measured for distance; in three-dimensional mode, four base stations need to be measured for distance.

[0030] AOA Positioning

[0031] AOA positioning generally calculates the arrival angle based on the phase difference, and is generally not used alone. Since AOA involves the problem of angle resolution, if AOA positioning is used alone, the farther away from the base station, the worse the positioning accuracy. AOA can be used in conjunction with TOF ranging for current positioning. In this mode, a single base station can complete positioning.

[0032] The present application provides a touch screen device that supports intelligent switching of teaching pen types, using UWB positioning technology to support intelligent switching of handwriting types on the touch screen according to the teaching pen held by the teaching staff. The device includes a touch screen, a base station and multiple teaching pens.

[0033] The teaching pen is a special pen for touch screens that can be used for writing or drawing on the touch screen. The teaching pen is equipped with a battery-powered UWB (UltraWideBand) positioning tag that can send UWB signals, and each teaching pen has its own unique ID value to distinguish it from other teaching pens. Each teaching pen corresponds to a different handwriting type, which includes color, line type, thickness, etc. In order to clearly distinguish the line type represented by the teaching pen, an intuitive handwriting type can be pasted or sprayed on the teaching pen to distinguish it. For example, teaching pens with different color handwriting are distinguished by different colors.

[0034] The base station is equipped with a UWB receiver, which can receive the UWB signal sent by the UWB positioning tag on the teaching pen. Figure 1 As shown, 2-3 base stations are installed around the touch screen, which locate the position of the teaching pen by receiving the UWB signal sent by the UWB positioning tag on the teaching pen. Of course, a larger number of base stations can provide more accurate positioning information.

[0035] When the teaching staff picks up the teaching pen and prepares to write on the touch screen, the base station receives the UWB signal of the teaching pen, calculates the position of the teaching pen close to the touch screen, and obtains the ID value of the teaching pen from the UWB signal of the teaching pen, thereby the base station can obtain which teaching staff is going to use which teaching pen to write on the touch screen. The base station sends the information of the teaching pen to the touch screen.

[0036] The teaching system is running on the touch screen. When the touch screen receives the teaching pen information sent by the base station, the teaching system switches the current writing line type according to the ID value of the teaching pen. Through the information transmission from the teaching pen to the base station and then to the touch screen, the teaching staff can pick up a certain type of teaching pen and write directly on the touch screen. The touch screen can adjust the handwriting type in real time according to the teaching pen, which greatly simplifies the operation process of switching handwriting when teaching.

[0037] On the basis of the base station identifying the teaching pen, the function of locating the teaching pen can also be realized. The teaching pen is a public item. During use, it is often mixed with other items, which is inconvenient to find. The base station of this device can determine the location information of the teaching pen in real time because it uses UWB positioning technology. The teaching system on the touch screen supports the function of locating the teaching pen. When the teaching staff selects the teaching pen to be found on the touch screen, the teaching system obtains the precise location of the teaching pen through the base station, and prompts the teaching pen's orientation information including direction and distance on the touch screen, which can assist the teaching staff to quickly find the teaching pen.

[0038] In practical applications, UWB positioning technology has very superior indoor positioning performance. In some cases, the device can also use wireless transmission technologies such as WIFI and Bluetooth instead of UWB to achieve the positioning function. In addition, cameras can be deployed around the touch screen to identify the type of teaching pen in the hands of the teaching staff through an intelligent recognition system, but this method may be limited by the angle of the camera, and the accuracy of identifying the teaching pen is relatively affected.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A touch screen device supporting intelligent switching of teaching pen types, characterized in that: The device comprises: Several teaching pens, equipped with positioning tags, are used to write on the touch screen and also to send positioning information to the base station; A base station having a positioning information receiver installed around the touch screen and used to receive the positioning information sent by the teaching pen and send the type of the teaching pen close to the touch screen to the touch screen; and A touch screen is used to display the writing content of the teaching pen; the touch screen includes a teaching system, and the teaching system switches the handwriting type displayed on the touch screen according to the teaching pen type sent by the base station.

2. The touch screen device supporting intelligent switching of teaching pen types according to claim 1, characterized in that: The positioning tag is a battery-powered UWB positioning tag; the positioning information receiver is a UWB receiver.

3. The touch screen device supporting intelligent switching of teaching pen types according to claim 2, characterized in that: The number of base stations is 2 or more.

4. The touch screen device supporting intelligent switching of teaching pen types according to claim 1, characterized in that: The handwriting type includes color, line type and / or thickness.

5. The touch screen device supporting intelligent switching of teaching pen types according to claim 1, characterized in that: The teaching pen has a unique ID value, and the positioning information sent by the teaching pen includes the ID value.

6. The touch screen device supporting intelligent switching of teaching pen types according to claim 1, characterized in that: The teaching pen has different labels indicating the characteristics of the handwriting according to the different handwritings it represents.

7. The touch screen device supporting intelligent switching of teaching pen types according to claim 1, characterized in that: The teaching system is also used to obtain the positioning information of the teaching pen to be found through the base station when the teaching staff selects the teaching pen to be found on the touch screen, and display the direction and distance of the teaching pen to be found on the touch screen.

8. The touch screen device supporting intelligent switching of teaching pen types according to claim 1, characterized in that: The base station is also used to send the location information of the designated teaching pen to the touch screen according to the request of the teaching system.

Images