CN110667287B - Trace removal method and related product - Google Patents
Trace removal method and related product Download PDFInfo
- Publication number
- CN110667287B CN110667287B CN201910889090.7A CN201910889090A CN110667287B CN 110667287 B CN110667287 B CN 110667287B CN 201910889090 A CN201910889090 A CN 201910889090A CN 110667287 B CN110667287 B CN 110667287B
- Authority
- CN
- China
- Prior art keywords
- eraser
- coil
- erasing
- electromagnetic
- erasing mode
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
Landscapes
- Position Input By Displaying (AREA)
Abstract
The embodiment of the application discloses a trace removing method and a related product, wherein the method comprises the following steps: detecting and determining the moving path of the eraser on the surface of the display board; determining an erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the electromagnetic receiving coils; and calculating the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area. According to the embodiment of the application, the erasing mode of the eraser is determined through the electromagnetic positioning technology, the erasing area of the eraser is further determined when the display trace is erased, and the efficiency and the accuracy of removing the display trace are improved.
Description
Technical Field
The application relates to the technical field of electromagnetic induction, in particular to a trace removing method and a related product.
Background
With the rapid development of scientific technology, the target positioning and tracking technology has also been developed and is applied more and more widely. The positioning technology can be applied to an electric signal display board so as to erase the display trace at the designated position. However, the positioning in the existing display trace erasing process can only be positioned to the approximate position of the eraser, which can cause inaccurate positioning, further cause large difference between the actual erased content and the expected erased content, and reduce erasing efficiency and erasing accuracy. How to effectively improve the positioning accuracy of the eraser is an urgent problem to be solved.
Disclosure of Invention
The embodiment of the application provides a trace clearing method and a related product, and aims to determine an erasing mode of an eraser through an electromagnetic positioning technology, further determine an erasing area of the eraser when a display trace is erased, and improve the efficiency and accuracy of clearing the display trace.
In a first aspect, an embodiment of the present application provides a trace removing method, which is applied to an erasing system, where the erasing system includes a display board and an eraser, the display board includes a processor, an electromagnetic transmitting coil and a display trace, the eraser includes an electromagnetic receiving coil, and the method includes:
detecting and determining the moving path of the eraser on the surface of the display board;
determining an erasing mode of the eraser according to the strength of an electromagnetic induction signal received by the electromagnetic coil;
and calculating to obtain the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area.
In one possible example, the determining the moving path of the eraser by the display board detection comprises:
controlling the electromagnetic transmitting coil to transmit electromagnetic signals in a preset period, and determining positions, which are less than a first preset distance from the transmitting coil, of the processor in the display board according to the received reflected signals to serve as a plurality of moving positions of the eraser;
the plurality of moving positions constitute a moving path of the eraser.
In one possible example, the determining the erasing mode of the eraser according to the strength of the electromagnetic induction signal of the eraser received by the display board comprises:
controlling an electromagnetic transmitting coil to transmit an electromagnetic signal and receiving an induction signal generated by an electromagnetic receiving coil in the eraser according to the electromagnetic signal;
determining the induction distance between the electromagnetic receiving coil and the electromagnetic transmitting coil according to the strength of the induction signal;
and determining the erasing mode of the eraser according to the sensing distance.
In one possible example, the determining the erasing mode of the eraser according to the sensing distance comprises:
and when the induction distances corresponding to the first coil, the second coil and the third coil are equal, determining that the erasing mode is a surface erasing mode.
In one possible example, the determining the erasing mode of the eraser according to the sensing distance comprises:
and when the induction distances corresponding to the first coil and the second coil are equal and the induction distances corresponding to the third coil are not equal, determining that the erasing mode is a line erasing mode.
In one possible example, the determining the erasing mode of the eraser according to the sensing distance comprises:
and when the induction distances corresponding to the first coil, the second coil and the third coil are not equal, determining that the erasing mode is a point erasing mode.
In one possible example, the calculating and obtaining the erasing area of the eraser according to the moving path and the erasing mode includes:
when the erasing mode is the surface erasing mode, determining the erasing area as a first moving area formed by the area of the eraser and the moving path;
when the erasing mode is the line erasing mode, determining that the erasing area is a second moving area formed by the side length of the first edge of the eraser and the moving path;
and when the erasing mode is the point erasing mode, determining the erasing area as a third moving area formed by the corner points of the eraser and the moving path.
In a second aspect, embodiments of the present application provide a display board, comprising a processor, an electromagnetic transmission coil, and a display trace, wherein the processor is configured to:
detecting and determining the moving path of the eraser on the surface of the display board;
determining an erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and a plurality of electromagnetic receiving coils in the eraser;
and calculating to obtain the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area.
In one possible example, in determining the path of movement of the eraser by said presentation board detection, said processor is specifically configured to:
controlling the electromagnetic transmitting coil to transmit electromagnetic signals in a preset period, and determining positions, which are less than a first preset distance from the transmitting coil, of the processor in the display board according to the received reflected signals to serve as a plurality of moving positions of the eraser;
the plurality of moving positions constitute a moving path of the eraser.
In one possible example, in determining the erase mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the plurality of electromagnetic receiving coils, the processor is specifically configured to:
controlling an electromagnetic transmitting coil to transmit an electromagnetic signal and receiving a plurality of induction signals generated by a plurality of electromagnetic receiving coils in the eraser according to the electromagnetic signal;
determining a plurality of induction distances between the electromagnetic receiving coil and the plurality of electromagnetic transmitting coils according to the plurality of induction signal strengths;
and determining the erasing mode of the eraser according to the plurality of sensing distances.
In one possible example, the plurality of electromagnetic receiving coils are three electromagnetic receiving coils, namely a first coil, a second coil and a third coil, wherein the first coil and the second coil are equidistant from the third coil, and a connecting line of the first coil and the second coil is parallel to the first side of the eraser, and in terms of determining the erasing mode of the eraser according to the plurality of sensing distances, the processor is specifically configured to:
and when the induction distances corresponding to the first coil, the second coil and the third coil are equal, determining that the erasing mode is a surface erasing mode.
In one possible example, in determining the erase mode of the eraser based on the plurality of sensing distances, the processor is specifically configured to:
and when the induction distances corresponding to the first coil and the second coil are equal and the induction distances corresponding to the third coil are not equal, determining that the erasing mode is a line erasing mode.
In one possible example, in determining the erase mode of the eraser based on the plurality of sensing distances, the processor is specifically configured to:
and when the induction distances corresponding to the first coil, the second coil and the third coil are not equal, determining that the erasing mode is a point erasing mode.
In one possible example, in calculating the erase area of the eraser according to the moving path and the erase pattern, the processor is specifically configured to:
when the erasing mode is the surface erasing mode, determining the erasing area as a first moving area formed by the area of the eraser and the moving path;
when the erasing mode is the line erasing mode, determining that the erasing area is a second moving area formed by the side length of the first edge of the eraser and the moving path;
and when the erasing mode is the point erasing mode, determining the erasing area as a third moving area formed by the corner points of the eraser and the moving path.
In a third aspect, embodiments of the present application provide an eraser, which includes a plurality of electromagnetic receiving coils, for: the method comprises the steps of receiving an electromagnetic signal sent by an electromagnetic sending coil, generating a plurality of induction signals according to the electromagnetic signal, receiving the induction signals by a processor in the display board, determining an erasing mode of the eraser according to the induction signals, and determining and eliminating display traces corresponding to the erasing area of the display board according to the erasing mode.
In a fourth aspect, embodiments of the present application provide an erasing system comprising a display board and an eraser, the display board comprising a processor, an electromagnetic transmitting coil and a display trace, the eraser comprising a plurality of electromagnetic receiving coils, wherein the processor is configured to execute the instructions of the steps of the method of the first aspect.
In a fifth aspect, embodiments of the present application provide an electronic device, including a processor and a memory, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps of any of the methods of the first aspect.
It can be seen that in the application embodiment, the moving path of the eraser on the surface of the display board is determined through detection; then determining the erasing mode of the eraser according to the strength of electromagnetic induction signals received by a plurality of electromagnetic coils in the eraser; and finally, calculating the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area. In the process, the erasing mode of the eraser is detected through electromagnetic positioning, the contact area of the eraser and the display board can be determined, and then when the erasing area is determined through the moving path and the erasing mode, the accuracy of acquiring the erasing area is effectively improved, and the erasing accuracy and efficiency are improved.
Drawings
Reference will now be made in brief to the accompanying drawings, to which embodiments of the present application relate.
Fig. 1A is a schematic view of a display board provided in an embodiment of the present application;
fig. 1B is a schematic structural view of a display board according to an embodiment of the present disclosure;
fig. 1C is a schematic diagram of an electromagnetic signal reflection provided by an embodiment of the present application;
fig. 1D is a schematic diagram of an erase mode according to an embodiment of the disclosure;
FIG. 1E is a schematic diagram of another erase mode provided in the present application;
FIG. 1F is a schematic diagram of another erase mode provided in the present application;
FIG. 1G is a schematic diagram of an erase area according to an embodiment of the present disclosure;
FIG. 1H is a schematic diagram of another erase area provided in the present application;
FIG. 1I is a schematic diagram of another erase area provided in the present application;
FIG. 2 is a schematic flow chart illustrating a trace removal method according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
First, a display board in the embodiment of the present application is introduced, where the display board may be a white board, a blackboard, or an electronic product screen, and the display screen may be used for writing and erasing display traces, please refer to fig. 1A, where fig. 1A is a schematic view of a display board provided in the embodiment of the present application, as shown in fig. 1A, a signal pen may be used to write a display trace on a display board 10, which comprises a processor 11 and an electromagnetic transmission coil 12, and a surface further comprising a display trace 13, the structure of the display board can be as shown in fig. 1B, fig. 1B is a schematic view of a display board structure provided in an embodiment of the present application, the display board is composed of Polyethylene Terephthalate (PET) 102, nano silver 103 and electromagnetic coil 104, since the electromagnetic coil 104 is mainly used for transmitting an electromagnetic signal in the present embodiment, the electromagnetic coil 104 is made an electromagnetic transmitting coil. The display board is internally provided with a processor which can control the electromagnetic coil to generate electromagnetic signals and simultaneously carry out data processing on electromagnetic induction results received by the electromagnetic coil. The display traces on the surface of the display board are further controlled according to the data processing result, the effect of eliminating the display traces can be achieved, and the display traces can be fonts, paintbooks or other arbitrary traces.
The following describes embodiments of the present application in detail.
Referring to fig. 2, fig. 2 is a schematic flow chart of a trace removing method for an erasing system, the erasing system includes a display board and an eraser, the display board includes a processor, an electromagnetic transmitting coil and a display trace, the eraser includes a plurality of electromagnetic receiving coils, as shown in fig. 2, the method includes the following steps:
201. the moving path of the eraser on the surface of the display board is obtained.
The blackboard eraser is a tool for eliminating display traces on the surface of the display board, and the blackboard eraser can be a white board eraser, a blackboard eraser or an electronic product screen eraser corresponding to the display board. The user moves the eraser to slide on the surface of the display board, namely, the display trace in the sliding trace range is eliminated. Therefore, it is a crucial step to obtain the moving path of the eraser on the surface of the display board. The method for acquiring the moving path can be to perform contact detection on the board eraser and the display board and then determine the moving path of the board eraser according to the moving path of the contact position, wherein the contact detection comprises capacitance potential change detection, conduction detection or magnetic induction detection and the like.
In an alternative example, the determination of the moving path of the eraser by the presentation board detection comprises: controlling an electromagnetic transmitting coil to transmit an electromagnetic signal in a preset period, and determining positions, which are not more than a first preset distance away from the transmitting coil, as a plurality of moving positions of the eraser by a processor in the display board according to the received reflected signal; the plurality of moving positions constitute a moving path of the eraser.
The processor in the display board controls the electromagnetic sending coil to send the electromagnetic signals, the electromagnetic signals are reflected when the electromagnetic signals touch a real object, and because the distance between each position of the electromagnetic sending coil and the eraser is different, a plurality of corresponding reflection signals can be obtained from the electromagnetic signals sent by the electromagnetic sending coil at each moment, and a plurality of reflection distances can be determined according to the intensity of the plurality of reflection signals. Referring to fig. 1C, if the reflection distance is a distance from the electromagnetic transmitting coil to the surface of the display board, and is set as a first preset distance, and fig. 1C is a schematic diagram of electromagnetic signal reflection provided in this embodiment of the present application, as shown in fig. 1C, the electromagnetic transmitting coil transmits an electromagnetic signal in a preset period T, where T is a small value, such as 1s (second), 10ms (millisecond), and so on, then within 2 periods T of T1 → T2 → T3, a plurality of reflection distances of the electromagnetic signal by the board eraser 105 at the time T1 can be obtained, which are s11, s12, and s13 …, respectively, where s11 is not greater than the first preset distance, and then it can be determined that the position L1 corresponding to s11 is a contact position of the board eraser 105 and the display board 101, that is a moving position of the board eraser 105 at the time T1. Similarly, the moving position L2 of the eraser 105 at the time t2 and the moving position L3 of the eraser 105 at the time t3 are obtained, and then the three moving positions L1 → L2 → L3 constitute the moving path of the eraser 105.
202. And determining the erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the electromagnetic receiving coils.
The demonstration board comprises an electromagnetic transmitting coil, the blackboard eraser comprises a plurality of electromagnetic receiving coils, electromagnetic signal induction can be carried out between the electromagnetic transmitting coil and the electromagnetic receiving coils, and different erasing postures corresponding to the blackboard eraser are different due to different induction signal strengths, so that different erasing modes of the blackboard eraser can be positioned.
In an alternative example, the determining the erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the electromagnetic receiving coils comprises the following steps: controlling an electromagnetic transmitting coil to transmit an electromagnetic signal and receiving a plurality of induction signals generated by a plurality of electromagnetic receiving coils in the eraser according to the electromagnetic signal; determining a plurality of induction distances between the electromagnetic receiving coil and the plurality of electromagnetic transmitting coils according to the plurality of induction signal strengths; and determining the erasing mode of the eraser according to the plurality of sensing distances.
Specifically, the processor in the display board can acquire the electromagnetic induction signal intensity of the eraser received by the display board, and then determine the induction distance according to the electromagnetic induction signal intensity. Then, the induction distance between the display board and the eraser can be determined according to the strength of the induction signal between the electromagnetic transmitting coil and the electromagnetic receiving coil in the eraser, and different induction distances mean that when a user uses the eraser to erase a display mark on the display board, different postures are adopted, so that the contact positions and the contact areas of the eraser and the display board are different, and correspondingly, the corresponding erasing areas of the eraser in the moving path of the eraser are also different.
In an alternative example, the plurality of electromagnetic receiving coils are three electromagnetic receiving coils, and include a first coil, a second coil and a third coil, wherein the first coil and the second coil are equidistant from the third coil, and a connecting line of the first coil and the second coil is parallel to the first edge of the eraser, and the erasing mode of the eraser is determined according to a plurality of induction distances, including: and when the induction distances corresponding to the first coil, the second coil and the third coil are equal, determining that the erasing mode is the surface erasing mode.
Referring to fig. 1D, fig. 1D is a schematic diagram of an erase mode of the board eraser according to an embodiment of the present disclosure, as shown in fig. 1D, the board eraser includes a first coil 106, a second coil 107 and a third coil 108, wherein the first coil, the second coil and the third coil are equidistant from the third coil 108, that is, the first coil, the second coil and the third coil form an isosceles triangle, and a connecting line between the first coil, the third coil and the second coil and the third coil is two isosceles sides of the isosceles triangle. And the connection between the first coil and the second coil is parallel to the first edge 1051 of the wipe.
When the sensing distances corresponding to the first coil, the second coil and the third coil are equal, it indicates that the eraser is parallel to the surface of the display board, and since the moving path of the eraser has been obtained in the foregoing, it indicates that the eraser is in contact with the surface of the display board, so that the whole erasing surface of the eraser moves in parallel on the surface of the display board, and it can be determined that the erasing mode of the eraser is the surface erasing mode, and the whole erasing surface of the eraser is in contact with the display board.
In an alternative embodiment, determining the erase mode of the eraser based on a plurality of sensing distances comprises: and when the induction distances corresponding to the first coil and the second coil are equal and the induction distances corresponding to the third coil are not equal, determining that the erasing mode is a line erasing mode.
Referring to fig. 1E, fig. 1E is a schematic diagram of another erase mode provided by the present embodiment, as shown in fig. 1E, the first coil 106 and the second coil 107 have the same sensing distance with the display board, which illustrates that the first coil and the second coil are the same distance with the contact position of the display board, because the connection line of the first coil and the second coil is parallel to the first edge 1051 of the board eraser, so the vertical distance between the first coil and the first edge 1051 is the same, when the first edge 1051 is the contact position of the board eraser and the display board, the sensing distance between the first coil and the display board, the sensing distance between the third coil and the display board are the same as the sensing distance between the first coil and the second coil. At this time, the erasing mode can be determined as a line erasing mode, and the eraser and the display board are contacted through the first edge.
Optionally, determining an erasing mode of the eraser according to the plurality of sensing distances includes: and when the induction distances corresponding to the first coil, the second coil and the third coil are not equal, determining the erasing mode as a point erasing mode.
Referring to fig. 1F, fig. 1F is a schematic diagram of another erasing mode provided in this embodiment of the application, as shown in fig. 1F, the eraser contacts the display board through an angular point a, where the angular point a may be any one of 4 angular points of the eraser, and at this time, the sensing distances corresponding to the first coil 106, the second coil 107, and the third coil 108 and the display board are different from each other, so that when the three sensing distances corresponding to the first coil, the second coil, and the third coil are not equal to each other, it may be determined that the erasing mode is the point erasing mode, and at this time, only one angular point of the eraser contacts the display board.
203. And calculating to obtain the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area.
After the moving path and the erasing mode corresponding to the eraser are determined, the erasing area of the eraser can be calculated, the display traces in the erasing area are the content which the user wants to erase, and the processor in the display board can eliminate the display traces in the erasing area to finish the trace removal in the erasing system.
Optionally, calculating the erasing area of the eraser according to the moving path and the erasing mode includes: when the erasing mode is the surface erasing mode, determining the erasing area as a first moving area formed by the area of the eraser and the moving path; when the erasing mode is a line erasing mode, determining the erasing area as a second moving area formed by the side length of the first edge of the eraser and the moving path; and when the erasing mode is the point erasing mode, determining the erasing area as a third moving area formed by the corner points of the eraser and the moving path.
Referring to fig. 1G, fig. 1G is a schematic diagram of an erasing area provided in the present embodiment, as shown in fig. 1G, when the erasing mode is the area erasing mode, the erasing area moves from the position L4 to the position L5, since the entire erasing surface contacts the display board during the entire moving path, the erasing area is a1 ═ a1 at the position s1, where a1 represents the erasing area, the erasing area is a2 ═ a1 (s2-s1) + a1 at the position s2, and the erasing area is A3 ═ a1 (s3-s2) + a1+ a1-a1 ═ a1 (A3-a1) + a1 at the position s3, that is the erasing area + the erasing area.
Next, referring to fig. 1H, fig. 1H is a schematic diagram of another erasing area provided in the embodiment of the present application, as shown in fig. 1H, when the erasing mode is the line erasing mode, the eraser moves from the position L7 to the position L6, during the whole moving process, the first edge 1051 of the eraser contacts with the display board, and an area formed by the first edge and the moving path is the erasing area, that is, the erasing area is the first side length moving path.
Referring to fig. 1I again, fig. 1I is another schematic diagram of an erasing area provided in the embodiment of the present application, as shown in fig. 1I, when the erasing mode is the dot erasing mode, the eraser moves from the position L8 to the position L9, during the whole moving process, only one corner of the eraser contacts the display board, and an area formed by the dot and the moving path is the erasing area, that is, the erasing area is the corner area. When the angular point surface is small, the erasing area is a line corresponding to one moving path.
It can be seen that, in the application embodiment, the moving path of the eraser on the surface of the display board is determined through detection; then determining the erasing mode of the eraser according to the strength of the electromagnetic induction signal received by the electromagnetic coil; and finally, calculating the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area. In the process, the erasing mode of the eraser is detected through electromagnetic positioning, the contact area of the eraser and the display board can be determined, and then when the erasing area is determined through the moving path and the erasing mode, the accuracy of acquiring the erasing area is effectively improved, and the erasing accuracy and efficiency are improved.
In accordance with the above, referring to fig. 3, fig. 3 is a schematic structural diagram of an electronic device 300 according to an embodiment of the present application, and as shown in fig. 3, the electronic device includes a processor 301, a memory 302, a communication interface 303, and one or more programs, where the one or more programs are stored in the memory 302 and configured to be executed by the processor, and the programs include instructions for:
detecting and determining the moving path of the eraser on the surface of the display board;
determining an erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the electromagnetic receiving coils;
and calculating to obtain the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area.
In one possible example, the determining the moving path of the eraser by the display board detection comprises:
controlling the electromagnetic transmitting coil to transmit electromagnetic signals in a preset period, and determining positions, which are less than a first preset distance from the transmitting coil, of the processor in the display board according to the received reflected signals to serve as a plurality of moving positions of the eraser;
the plurality of moving positions constitute a moving path of the eraser.
In one possible example, the determining the erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the plurality of electromagnetic receiving coils comprises:
controlling an electromagnetic transmitting coil to transmit an electromagnetic signal and receiving a plurality of induction signals generated by a plurality of electromagnetic receiving coils in the eraser according to the electromagnetic signal;
determining a plurality of induction distances between the electromagnetic receiving coil and the plurality of electromagnetic transmitting coils according to the plurality of induction signal strengths;
and determining the erasing mode of the eraser according to the plurality of sensing distances.
In one possible example, the determining the erasing mode of the eraser according to the plurality of sensing distances comprises:
and when the induction distances corresponding to the first coil, the second coil and the third coil are equal, determining that the erasing mode is a surface erasing mode.
In one possible example, the determining the erase mode of the eraser according to the plurality of sensing distances comprises:
and when the induction distances corresponding to the first coil and the second coil are equal and the induction distances corresponding to the third coil are not equal, determining that the erasing mode is a line erasing mode.
In one possible example, the determining the erase mode of the eraser according to the plurality of sensing distances comprises:
and when the induction distances corresponding to the first coil, the second coil and the third coil are not equal, determining that the erasing mode is a point erasing mode.
In one possible example, the calculating and obtaining the erasing area of the eraser according to the moving path and the erasing mode includes:
when the erasing mode is the surface erasing mode, determining the erasing area as a first moving area formed by the area of the eraser and the moving path;
when the erasing mode is the line erasing mode, determining that the erasing area is a second moving area formed by the side length of the first edge of the eraser and the moving path;
and when the erasing mode is the point erasing mode, determining the erasing area as a third moving area formed by the corner points of the eraser and the moving path.
The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It is understood that the electronic device comprises corresponding hardware structures and/or software elements for performing the respective functions in order to realize the above-mentioned functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and algorithm steps described in connection with the embodiments provided herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the electronic device may be divided into the functional units according to the method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
The present application also provides an erasing system, which includes the display board and the eraser according to the above embodiments, wherein the display board includes a processor, an electromagnetic transmitting coil and a display trace, and the eraser includes a plurality of electromagnetic receiving coils, wherein the processor is configured to execute the instructions of the steps in the method of any one of fig. 1A-1I and fig. 2.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (8)
1. A trace removal method is applied to an erasing system, the erasing system comprises a display board and an eraser, the display board comprises a processor, an electromagnetic transmitting coil and display traces, the eraser comprises a plurality of electromagnetic receiving coils, and the method comprises the following steps:
detecting and determining the moving path of the blackboard eraser on the surface of the display board, specifically: controlling the electromagnetic transmitting coil to transmit electromagnetic signals in a preset period, and determining positions, which are less than a first preset distance from the transmitting coil, of the processor in the display board according to the received reflected signals to serve as a plurality of moving positions of the eraser; the plurality of moving positions form a moving path of the eraser;
determining an erasing mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the electromagnetic receiving coils, wherein the erasing mode comprises a surface erasing mode, a line erasing mode and a point erasing mode;
and calculating to obtain the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area.
2. The method of claim 1, wherein determining the erase mode of the eraser according to the received electromagnetic induction signal strength of the electromagnetic transmitting coil and the plurality of electromagnetic receiving coils comprises:
controlling an electromagnetic transmitting coil to transmit an electromagnetic signal and receiving a plurality of induction signals generated by a plurality of electromagnetic receiving coils in the eraser according to the electromagnetic signal;
determining a plurality of induction distances between the electromagnetic receiving coil and the plurality of electromagnetic transmitting coils according to the plurality of induction signal strengths;
and determining the erasing mode of the eraser according to the plurality of sensing distances.
3. The method of claim 1 or 2, wherein the plurality of electromagnetic receiving coils are three electromagnetic receiving coils including a first coil, a second coil and a third coil, wherein the first coil and the second coil are equidistant from the third coil, and a connecting line of the first coil and the second coil is parallel to a first edge of the eraser, and the determining the erasing mode of the eraser according to the plurality of sensing distances comprises:
and when the induction distances corresponding to the first coil, the second coil and the third coil are equal, determining that the erasing mode is a surface erasing mode.
4. The method of claim 3, wherein determining the erase mode of the eraser based on the plurality of sensing distances comprises:
and when the induction distances corresponding to the first coil and the second coil are equal and the induction distances corresponding to the third coil are not equal, determining that the erasing mode is a line erasing mode.
5. The method of claim 3, wherein determining the erase mode of the eraser based on the plurality of sensing distances comprises:
and when the induction distances corresponding to the first coil, the second coil and the third coil are not equal, determining that the erasing mode is a point erasing mode.
6. The method according to claim 4 or 5, wherein the calculating and obtaining the erasing area of the eraser according to the moving path and the erasing mode comprises:
when the erasing mode is the surface erasing mode, determining the erasing area as a first moving area formed by the area of the eraser and the moving path;
when the erasing mode is the line erasing mode, determining that the erasing area is a second moving area formed by the side length of the first edge of the eraser and the moving path;
and when the erasing mode is the point erasing mode, determining the erasing area as a third moving area formed by the corner points of the eraser and the moving path.
7. A presentation board comprising a processor, an electromagnetic transmission coil and a presentation trace, wherein the processor is configured to:
detecting and determining a moving path of the eraser, specifically: controlling the electromagnetic transmitting coil to transmit electromagnetic signals in a preset period, and determining positions, which are less than a first preset distance from the transmitting coil, of the processor in the display board according to the received reflected signals to serve as a plurality of moving positions of the eraser; the plurality of moving positions form a moving path of the eraser;
determining an erasing mode of the eraser according to the received electromagnetic induction signal intensity of the eraser, wherein the erasing mode comprises a surface erasing mode, a line erasing mode and a point erasing mode;
and calculating to obtain the erasing area of the eraser according to the moving path and the erasing mode, and eliminating the display trace corresponding to the erasing area.
8. An eraser, comprising a plurality of electromagnetic receiving coils for:
the method comprises the steps of receiving an electromagnetic signal sent by an electromagnetic sending coil, generating a plurality of induction signals according to the electromagnetic signal, receiving the induction signals by a processor in a display board, determining an erasing mode of the eraser according to the induction signals, wherein the erasing mode comprises a surface erasing mode, a line erasing mode and a point erasing mode, determining positions which are less than a first preset distance from the electromagnetic sending coil as a plurality of moving positions of the eraser according to received reflection signals by the processor in the display board, forming a moving path of the eraser by the moving positions, and determining and eliminating display traces corresponding to an erasing area of the display board according to the moving path and the erasing mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019108836688 | 2019-09-18 | ||
| CN201910883668 | 2019-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110667287A CN110667287A (en) | 2020-01-10 |
| CN110667287B true CN110667287B (en) | 2021-08-24 |
Family
ID=69078286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910889090.7A Active CN110667287B (en) | 2019-09-18 | 2019-09-19 | Trace removal method and related product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110667287B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158538B (en) * | 2019-12-18 | 2023-09-22 | 深圳市东向同人科技有限公司 | Trace processing method, intelligent blackboard and computer readable storage medium |
| CN111506215B (en) * | 2020-03-23 | 2024-03-26 | 利亚德光电股份有限公司 | Method and device for erasing screen content |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882032A (en) * | 2010-07-02 | 2010-11-10 | 廖明忠 | Handwriting input method, device and system and receiver |
| CN201638161U (en) * | 2009-10-29 | 2010-11-17 | 太瀚科技股份有限公司 | Electromagnetic whiteboard eraser |
| CN108407501A (en) * | 2018-01-24 | 2018-08-17 | 河南工程学院 | A kind of electronic blackboard with automatic erasing function |
| CN208538095U (en) * | 2018-05-08 | 2019-02-22 | 深圳市德安里科技有限公司 | A kind of erasing apparatus and display system |
| CN110018758A (en) * | 2018-01-10 | 2019-07-16 | 鸿合科技股份有限公司 | Electronic whiteboard, electron plate scrape along electronic pen |
-
2019
- 2019-09-19 CN CN201910889090.7A patent/CN110667287B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201638161U (en) * | 2009-10-29 | 2010-11-17 | 太瀚科技股份有限公司 | Electromagnetic whiteboard eraser |
| CN101882032A (en) * | 2010-07-02 | 2010-11-10 | 廖明忠 | Handwriting input method, device and system and receiver |
| CN110018758A (en) * | 2018-01-10 | 2019-07-16 | 鸿合科技股份有限公司 | Electronic whiteboard, electron plate scrape along electronic pen |
| CN108407501A (en) * | 2018-01-24 | 2018-08-17 | 河南工程学院 | A kind of electronic blackboard with automatic erasing function |
| CN208538095U (en) * | 2018-05-08 | 2019-02-22 | 深圳市德安里科技有限公司 | A kind of erasing apparatus and display system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110667287A (en) | 2020-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8169404B1 (en) | Method and device for planary sensory detection | |
| US9069386B2 (en) | Gesture recognition device, method, program, and computer-readable medium upon which program is stored | |
| CN107656620B (en) | Virtual object control method and device, electronic equipment and storage medium | |
| KR20160124786A (en) | In-air ultrasound pen gestures | |
| US20060007166A1 (en) | Method and controller for identifying a drag gesture | |
| CN110667287B (en) | Trace removal method and related product | |
| KR20100122383A (en) | Method and apparatus for display speed improvement of image | |
| CN108027648A (en) | The gesture input method and wearable device of a kind of wearable device | |
| CN105242861A (en) | Ultrasonic wave-based parameter adjustment method and device | |
| CN107291307A (en) | Ultrasonic wave contactor control device and method, display device | |
| CN103455171A (en) | Three-dimensional interactive electronic whiteboard system and method | |
| CN103902086A (en) | Curve fitting based touch trajectory smoothing method and system | |
| WO2013132244A1 (en) | User input system | |
| CN107272892B (en) | Virtual touch system, method and device | |
| CN103970439A (en) | Method for utilizing projected gesture completion to improve instrument performance | |
| CN111610869B (en) | Touch pen, electronic device and control method | |
| CN103645848A (en) | Ultrasonic wave based terminal control method and device | |
| CN106909256A (en) | Screen control method and device | |
| CN111420395A (en) | Interaction method and device in game, readable storage medium and electronic equipment | |
| CN106569716B (en) | Single-hand control method and control system | |
| EP3676692A1 (en) | Selective scanning for touch-sensitive display device | |
| CN106598422B (en) | hybrid control method, control system and electronic equipment | |
| CN109074187A (en) | Determination method, capacitance touch-control device and the electronic device of touch control detection wrong report point | |
| CN111813272A (en) | Information input method and device and electronic equipment | |
| CN110908568A (en) | Control method and device for virtual object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |