CN116069197B

CN116069197B - Control method and system of electromagnetic induction type handwriting board

Info

Publication number: CN116069197B
Application number: CN202310148493.2A
Authority: CN
Inventors: 李永贵; 曾锦升
Original assignee: Shenzhen Newyes Technology Ltd
Current assignee: Shenzhen Newyes Technology Ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-10-20
Anticipated expiration: 2043-02-02
Also published as: CN116069197A

Abstract

The application provides a control method and a system of an electromagnetic induction handwriting board, wherein the method comprises the following steps: collecting handwriting writing signals of a target user based on an electromagnetic induction type handwriting board; converting the obtained writing text to a display screen for display according to a preset coordinate conversion mechanism; when the display result is consistent with the problem result, judging that writing is complete; when the display result is inconsistent with the problem result, judging that writing is to be verified, and carrying out frame selection reminding on a display screen according to inconsistent information of the display result and the problem result and extension information of inconsistent position points; when the writing is related to incomplete writing, performing handwriting local cleaning; when the writing is complete, the writing is globally cleared. Through the writing signal on the acquisition writing board, carry out text conversion and carry out unanimous comparison with the demonstration result and problem result, adjust the writing board, guarantee the accuracy nature of writing board, and then guarantee the integrality of follow-up writing content.

Description

Control method and system of electromagnetic induction type handwriting board

Technical Field

The application relates to a control method and a control system of an electromagnetic induction handwriting board, and belongs to the technical field of automatic control.

Background

The electromagnetic electronic whiteboard system is a multimedia tool integrating software and hardware technology into a whole, and is composed of hardware systems such as an electromagnetic induction electronic whiteboard, a computer system, an electronic induction pen, a projector with a VGA interface and the like, and an application software system of the interactive electronic whiteboard.

In the writing process based on the electromagnetic induction type handwriting board, handwriting is generally induced to transmit relevant content to a display screen for display, but the writing content may be lost due to conditions of induction delay, induction invalidation and the like in the process.

Therefore, the invention provides a control method and a system of an electromagnetic induction type handwriting board.

Disclosure of Invention

The invention provides a control method of an electromagnetic induction handwriting board, which comprises the following steps:

step 1: acquiring handwriting writing signals of a target user on a first problem in a display screen based on an electromagnetic induction type handwriting board;

step 2: identifying the handwriting writing signal, and converting the obtained writing text to a display screen for first display according to a preset coordinate conversion mechanism;

step 3: when the first display result is consistent with the question result of the first question, judging that writing is complete, controlling voice broadcasting to answer correctly, entering into the next question, and continuously identifying handwriting writing signals;

Step 4: when the first display result is inconsistent with the problem result of the first problem, determining that writing is to be verified specifically includes: determining whether displayed content is missing or displayed content is wrong, wherein the content is missing by comparing a first display result with a shooting result on a writing board, if the first display result is inconsistent with the shooting result, the content is regarded as missing, if the first display result is consistent with the shooting result, the content is regarded as not missing, and if the first display result is determined to be different from the outline of a problem result of the first problem under the condition that the content is not missing, the content is regarded as wrong;

step 5: when the first display result is determined to be the missing content, the missing content needs to be subjected to point extension to supplement the missing content, so that whether the filled result is consistent with the outline of the problem result or not is determined after the filling is complete;

it should be noted that, before the handwriting writing signal of the first problem in the display screen is collected by the target user based on the electromagnetic induction type handwriting board, the method further includes:

collecting an input instruction of the target user based on an electromagnetic induction handwriting board;

when the input instruction is related to voice acquisition, starting a microphone to acquire current voice information of the target user, performing text conversion on the voice information, and transmitting the voice information to a position to be displayed on the display screen for second display;

When the second display result is consistent with the question result of the first question, controlling the voice broadcasting to answer correctly;

and when the input instruction is related to handwriting collection, collecting writing signals which are sensed by the electromagnetic pen based on the electromagnetic induction type handwriting board.

according to a historical test case set, the electromagnetic induction type handwriting board is tested respectively, a plurality of induction tracks of an electromagnetic pen nib on the electromagnetic induction type handwriting board are captured, meanwhile, a plurality of movement tracks corresponding to the electromagnetic pen nib on the electromagnetic induction type handwriting board are collected based on a first camera, a plurality of display tracks corresponding to a mouse cursor on a display screen are collected based on a second camera, and a plurality of track comparison combinations are constructed;

performing first comparison on the induction track and the moving track in the same-group track comparison combination, and performing second comparison on the induction track and the display track in the same-group track comparison combination;

according to a first comparison result, determining a coordinate difference between an induction coordinate set and a moving coordinate set of the electromagnetic induction type handwriting board to lock a first area to be confirmed of the electromagnetic induction type handwriting board, and simultaneously, according to a value difference between an induction value of each induction coordinate of the electromagnetic induction type handwriting board and a standard value, locking a second area to be confirmed of the electromagnetic induction type handwriting board;

Determining a point mapping difference between an induction coordinate set and a display coordinate set of the electromagnetic induction type handwriting board according to a second comparison result to lock a third area to be confirmed of the electromagnetic induction type handwriting board;

when the area of the first area to be confirmed, the area of the second area to be confirmed and the area of the third area to be confirmed obtained by testing of each historical test case are all 0, judging that the corresponding test line is qualified;

when all the test lines of the electromagnetic induction handwriting board are qualified, judging that the electromagnetic induction handwriting board is qualified;

otherwise, calibrating the third overlapping area, the second overlapping area and the non-overlapping area according to the first area to be confirmed, the second area to be confirmed and the third area to be confirmed in the same disqualified test line, and constructing calibration vectors for the same disqualified test line according to vector construction standards;

constructing and obtaining a calibration matrix based on all the calibration vectors;

and pre-analyzing the calibration matrix to obtain a modification scheme of the electromagnetic induction handwriting board, and adjusting induction square grids to be modified in the electromagnetic induction handwriting board according to the modification scheme.

It should be noted that, according to the second comparison result, determining a point mapping difference between the sensing coordinate set and the display coordinate set of the electromagnetic induction type handwriting board to lock the third area to be confirmed of the electromagnetic induction type handwriting board includes:

acquiring a first dispersion induction in the horizontal direction and a second dispersion induction in the vertical direction of the same induction coordinate in the induction coordinate set;

acquiring a first dispersed pixel in the horizontal direction and a second dispersed pixel in the vertical direction of the same display coordinate in the display coordinate set;

comparing the horizontal positions of the first induction coils of the first scattered induction and the first scattered coils of the first scattered pixels of the same preset mapping point, and comparing the vertical positions of the second induction coils of the second scattered induction and the second scattered coils of the second scattered pixels, and according to the horizontal position comparison result and the vertical position comparison result;

according to the horizontal position comparison result, a first center position of the first induction coil and a second center position of the first dispersion coil are obtained, and meanwhile, a first contour of the first induction coil and a second contour of the first dispersion coil are obtained;

acquiring a first deviation according to the first central position and the second central position, and acquiring a second deviation according to the first contour and the second contour;

Acquiring a third central position of the second induction coil and a fourth central position of the second dispersion coil according to the vertical position comparison result, and acquiring a third contour of the second induction coil and a fourth contour of the second dispersion coil;

acquiring a third deviation according to the third central position and the fourth central position, and acquiring a fourth deviation according to the third contour and the fourth contour;

constructing a deviation function P (h 1, h2, h3, h 4), wherein h1 represents a first deviation, h2 represents a second deviation, h3 represents a third deviation, and h4 represents a fourth deviation;

when h1=0, h3=0, h2=0 and h4=0, judging that the comparison circles corresponding to the same preset mapping points are completely consistent, and taking the corresponding preset mapping points as qualified mapping points;

when h1=0, h3=0, h2++0, h4++0, judging that the comparison load corresponding to the same preset mapping point is inconsistent, if 0< h2 is less than or equal to a1,0< h4 is less than or equal to b1, judging that the comparison load corresponding to the same preset mapping point belongs to a negligible modification point, wherein a1 and b1 are constants;

otherwise, judging that the corresponding same preset mapping point belongs to a non-negligible modification point;

when h1 is not equal to 0, h3 is not equal to 0, h2 is not equal to 0, and h4 is not equal to 0, judging that the comparison circles corresponding to the same preset mapping points are completely inconsistent, and taking the corresponding preset mapping points as difference mapping points;

And locking a third area to be confirmed of the electromagnetic induction type handwriting board according to all the non-negligible modification points and the difference mapping points.

It should be noted that, performing pre-analysis on the calibration matrix to obtain a modification scheme of the electromagnetic induction handwriting board includes:

acquiring the occupied number n1 of each column of vectors in the calibration matrix and the maximum occupied element value n2 of the corresponding column of vectors;

when n1> n01 and n2> n02, locking corresponding induction square grids, and determining the locking number of each row of square grids and the locking number of each column of square grids based on the electromagnetic induction handwriting board based on square grid distribution of all the locked induction square grids, wherein n01 represents a first reference value; n02 represents a second reference value;

determining a main coil to be repaired according to the locking number of each row of square grids and the locking number of each column of square grids;

acquiring first test information and first winding information of a main coil to be repaired from a test result database, simultaneously acquiring second test information and second winding information of adjacent coils of the main coil to be repaired, inputting the first test information, the second test information, the first winding information and the second winding information into an information analysis model, and acquiring a first correction suggestion of the corresponding main coil to be repaired;

And acquiring a related modification scheme according to all the acquired first modification suggestions.

When determining that the first display result is that the contour is missing, the process of performing point extension on the missing content to supplement the missing content includes:

inconsistent information of the first display result and the problem result is obtained, and the inconsistent information is unfolded in an image space form corresponding to the position point;

when the inconsistent information is the missing information of the first display result based on the problem result, locking inconsistent position points in the unfolding result, and respectively acquiring the tangential direction and the track forward direction of each inconsistent position point to acquire a point extension line of the corresponding inconsistent position point;

supplementing the missing information according to the point extension line, and constructing a result to be compared based on a first display result;

when the to-be-compared result and the problem result have inconsistent outlines, the maximum range locking inconsistent information is based on the boundary line of the display screen, and frame selection reminding of incomplete writing is performed.

It should be noted that after the incomplete frame selection reminder is written, the method further includes:

determining a matching coordinate range of the electromagnetic induction handwriting board according to the frame selection prompt, wherein the matching coordinate range is related to a book content deletion range;

Analyzing whether the matched coordinate range is an independent voltage adjustment range, if so, controlling the current diaphragm voltage of the matched coordinate range on the electromagnetic induction handwriting board to be changed into a first diaphragm voltage;

if not, carrying out independent control division on the matched coordinate range, and determining independent complete division areas, dependent division areas and switch sets of each dependent division area based on the corresponding own complete division areas in the division result;

when the existing independent complete dividing area is 0 and the dependent dividing area is not 0, controlling a first regulating switch which has the smallest control range and comprises the area boundary of the corresponding dependent dividing area in a switch set of the own complete dividing area corresponding to each dependent dividing area to carry out voltage gear adjustment so as to change the voltage of a current diaphragm corresponding to the dependent dividing area into a second diaphragm voltage;

when the existing independent and complete divided area is non-0 and the dependent and complete divided area is non-0, at the moment, the current diaphragm voltage corresponding to the independent and complete divided area is controlled to be changed into the first diaphragm voltage, and meanwhile, the current diaphragm voltage corresponding to the dependent and complete divided area is controlled to be changed into the third diaphragm voltage according to the area distribution and the allowed area clearance condition of the dependent and complete divided area;

Based on the changed diaphragm voltage, the handwriting is locally cleared.

It should be noted that the method further comprises:

and when the displayed content is absent and the displayed internal fault tolerance is not met, controlling the reset key on the electromagnetic induction handwriting board to work, adjusting the whole diaphragm voltage of the electromagnetic induction handwriting board to be a cleanable diaphragm voltage, and performing handwriting global cleanup.

The invention provides a control system of an electromagnetic induction handwriting board, which comprises:

the signal acquisition module is used for acquiring handwriting writing signals of a target user on a first problem in the display screen based on the electromagnetic induction handwriting board;

the signal recognition module is used for recognizing the handwriting writing signal and converting the obtained writing text to a display screen for first display according to a preset coordinate conversion mechanism;

the result judging module is used for judging that writing is complete and controlling voice broadcasting to answer correctly when the first display result is consistent with the question result of the first question, entering the next question, and continuously identifying handwriting writing signals;

a display content determining module, configured to determine that writing is to be verified when a first display result is inconsistent with a problem result of the first problem, and determine whether displayed content is missing or displayed content is wrong according to inconsistent information of the first display result and the problem result, where the content missing is that the first display result is compared with a shooting result on a tablet, if the first display result is inconsistent with the shooting result, the content is regarded as missing, if the first display result is consistent with the shooting result, the content is regarded as not missing, and if it is determined that the first display result is different from the outline of the problem result of the first problem under the condition that the content is not missing, the content is regarded as wrong;

The point extension module is used for carrying out point extension on the missing content to supplement the missing content when the first display result is determined to be the missing outline, so as to determine whether the filled result is consistent with the outline of the problem result or not after the filling is complete;

the guiding module is used for analyzing the error content under the condition of content error to reserve a part of correct handwriting, reversely controlling and clearing the handwriting of the part to be cleared on the writing board, and simultaneously controlling the rest part of correct handwriting combined with the reserved part of correct handwriting to guide reminding on the display screen;

compared with the prior art, the application has the following beneficial effects:

through the writing signal on the acquisition writing board, carry out text conversion and carry out unanimous comparison with the demonstration result and problem result, adjust the writing board, guarantee the accuracy nature of writing board, and then guarantee the integrality of follow-up writing content.

Drawings

Fig. 1 is a flowchart of a control method of an electromagnetic induction type handwriting board provided by the application;

fig. 2 is a block diagram of a control system of an electromagnetic induction handwriting board provided by the application;

FIG. 3 is an exemplary diagram of a test circuit provided by the present application;

Fig. 4 is a diagram illustrating a deviation provided by the present application.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present application, the technical solutions of 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 apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that when an element is referred to as being "fixed" or "disposed on" another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the application, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the application.

Example 1:

the application provides a control method of an electromagnetic induction handwriting board, as shown in fig. 1, comprising the following steps:

step 5: when the first display result is determined to be the missing content, the missing content needs to be subjected to point extension to supplement the missing content, so that whether the filled result is consistent with the outline of the problem result or not is determined after the filling is complete.

In this embodiment, the first question and the next question are preset, and the written answer area corresponding to each question is set, for example, the first question displayed on the display screen is 3+5=, at this time, the answer result for the first question on the display screen is displayed on the preset area a on the display screen, and at this time, the number can be written at any position on the writing board, that is, the number can be used as the recognition result and transmitted to the area a for display.

In this embodiment, the problem result of the first problem is 8, which is preset, if the first display result at this time is 8, it is determined that writing is complete and the voice broadcast answer is correct, the next problem is entered, if the first display result at this time is not 8, it is determined that writing is to be verified, and whether displayed content is missing or displayed content is wrong is determined according to inconsistent information of the first display result and the problem result, so as to implement a frame selection reminder:

when the content is displayed to be missing or the internal fault tolerance is wrong, the handwriting is locally cleared.

In this embodiment, the content is deleted by comparing the first display result with the photographing result on the writing board, if not, the content is regarded as being deleted, and if not, the content is regarded as not being deleted;

If the outlines of the two results are different under the condition that the content is not missing, the error content is considered as the content error, under the condition that the content error exists, the error content is analyzed to reserve a part of correct handwriting, the handwriting on the writing board and the part to be cleared are reversely controlled to be cleared, meanwhile, the rest part of correct handwriting combined with the part of correct handwriting which needs to be reserved is controlled to guide reminding on a display screen, and when a target user writes on a corresponding reserved induction track, the correct guiding of the writing of the target user is realized.

In this embodiment, if the problem result is 8, the first display result is 6, and when it is determined that the first display result is that the content is not missing, the problem result is determined to be the result outline of the first display result, where the outlines are different, the problem result is considered as a content error, and under the condition of the content error, the first display result 6 is reserved, where the reserved correct handwriting may be the whole 6, because 6 does not affect the subsequent replenishment of 8, at this moment, the existing handwriting of the portion to be cleaned is not present, and further, the writing board is reversely controlled to only reserve the strokes for replenishing 6, where the replenished strokes are used as reminders, are displayed in a reminder window of the display screen, and are correctly guided to collect the replenished handwriting of the target user on the writing board, so as to replenish the strokes of the first display result 6.

Before the guidance, writing of 6 is realized based on a handwriting board and then first display is performed on a display screen, under the condition of content errors, the stop of 6 on the display screen is realized through software program setting, at the moment, only difference strokes of 8 and 6 are used as software degrees to control an induction coil matched with the difference strokes on the handwriting board to work, other induction coils do not work, at the moment, in the guidance process, only the induction coil in a working state is touched, the compensation of the difference strokes can be realized, the guidance of the difference strokes is further realized, and the difference strokes obtained by the induction coil in the working state are compensation notes on the handwriting board.

In this embodiment, when it is determined that the first display result is that the content is missing, it is indicated that there may be a problem with the tablet, and at this time, strokes of the missing portion of the content are rewritten on the tablet, and if the strokes are not supplemented, it is determined that there is a problem with the tablet, and a reminder is made.

In this embodiment, in the process of cleaning, a cleaning key and a local wiping key are arranged on the electromagnetic screen and the handwriting board, after the local wiping key is pressed, the voltage of the diaphragm is adjusted, handwriting on the diaphragm can be erased through silica gel on the pen, the corresponding position can be sensed when the capacitance pen is cleaned through the silica gel on the capacitance pen, and the corresponding handwriting on the liquid crystal display screen is cleaned correspondingly.

The beneficial effects of the technical scheme are as follows: through the writing signal on the acquisition writing board, carry out text conversion and carry out unanimous comparison with the demonstration result and problem result, adjust the writing board, guarantee the accuracy nature of writing board, and then guarantee the integrality of follow-up writing content.

Example 2:

based on the embodiment 1, before the handwriting writing signal of the first problem in the display screen is collected based on the electromagnetic induction type handwriting board, the method further comprises:

In this embodiment, an input button is provided on the electromagnetic induction type handwriting board, and the input button is related to voice and writing, and when voice is used, voice collection is performed to realize the answer to the question, and when writing is used, handwriting is collected to realize the answer to the question.

That is, both voice command input and writing command input can be performed through the input button.

In this embodiment, text conversion refers to converting speech information into speech text.

In this embodiment, the position to be displayed refers to a position area, such as position a, where the result 8 needs to be displayed.

The beneficial effects of the technical scheme are as follows: the reply mode to the first question is obtained by collecting the input instruction of the user, and then the integrity of the content is obtained by adopting a corresponding mode, so that supervision on the learning content is ensured.

Example 3:

In this embodiment, the history test case set refers to a preset test line, for example, the test is performed on the electromagnetic induction handwriting board according to the test lines 1, 2, 3, etc., as shown in fig. 3, so as to obtain the induction track corresponding to each test line, where the induction track is obtained by capturing the induction situation between the pen point of the electromagnetic pen and the writing board.

In this embodiment, the movement track is obtained by capturing the movement of the electromagnetic pen on the writing board according to the test lines 1, 2, and 3 during the test on the writing board.

In this embodiment, the display track identifies the track that is sensed by the tablet and transmitted to the display screen for display during testing on the tablet according to test lines 1, 2, 3.

In this embodiment, the first camera and the second camera are disposed in a direction of the writing board, and the first camera and the second camera are disposed in a direction of the display screen.

In this embodiment, the track comparison combination refers to the sensing track, the moving track and the display track under the same test line.

In this embodiment, the first comparison result is to obtain the difference between the sensing coordinate and the moving coordinate, because the obtained sensing coordinate is consistent with the moving coordinate only when the tablet is good, that is, when there is a difference between the two sensing coordinates, the tablet may have a sensing error, and the coordinate difference is further caused, that is, the region to be confirmed is locked according to the coordinate difference, for example, the sensing track obtained according to the test line 1 is 01, the obtained moving track is 02, and the a1-a2 segment on the sensing track 01 is different from the moving track 02, so the a1-a2 segment is regarded as the first region to be confirmed.

In this embodiment, the second comparison result is to determine whether the coordinate mapping relationship between the writing board and the display screen is reasonable, for example, the standard display coordinate of the sensing coordinate 01 on the display screen is 001, but the actually mapped display coordinate is 002, at this time, it may be determined that there is a point mapping difference between the sensing coordinate 01 and the display coordinate, and the third area to be confirmed including the sensing coordinate 01 is locked.

In this embodiment, the difference between the sensing value and the standard value is to determine the coil sensing condition corresponding to the sensing coordinate, determine whether the sensing is effective, and when there is a larger output between the sensing value and the standard value, for example, the absolute value of the difference between the sensing value and the standard value is greater than the set value b01, consider the area including the sensing coordinate corresponding to the sensing value as the second area to be confirmed.

In this embodiment, when all the areas are 0, it is determined that the corresponding test line is qualified, that is, there is no difference in the sensing coordinates, no difference in the sensing values, and no difference in the coordinate point map.

In this embodiment, for example, the first to-be-confirmed area in the test line includes: coordinates 01, 02, 03, 07, the second area to be confirmed includes: coordinates 01, 07, 08, the third area to be confirmed includes: in the case of coordinates 01 and 09, the third overlapping region is configured by coordinates 01, the second overlapping region is configured by coordinates 07, and the non-overlapping regions are configured by coordinates 02, 03, 08, and 09.

In the embodiment, the vector construction standard is to take each induction coordinate of the handwriting board as a corresponding column element, further obtain a blank filling vector aiming at all induction coordinates of the handwriting board, and further sequentially input a calibration result corresponding to each test line into the blank filling vector according to the coordinates to obtain a calibration vector;

And (5) arranging all the calibration vectors in a head-to-tail alignment manner to obtain a calibration matrix.

In this embodiment, the calibration matrix is as follows:

wherein s is _k1 A calibration value representing the 1 st disqualified test line based on the 1 st coordinate in the blank filling vector; s is(s) _kn A calibration value representing the 1 st disqualified test line based on the nth coordinate in the blank filling vector; s is(s) _m1 Representing the calibration value of the mth disqualification test line based on the 1 st coordinate in the blank filling vector; s is(s) _mn Representing a calibration value of an mth disqualification test line based on an nth coordinate in the blank filling vector;

in this embodiment, the calibration matrix is pre-analyzed to analyze the values of the matrix to obtain the test results for the same inductive coordinates in the same column, where the test results relate to calibration values, where the calibration values relate to three differences that exist.

In this embodiment, the modification means to adjust the number of windings of the coil matched with the corresponding inductive coordinates, or to replace the copper wire, etc.

In this embodiment, the calibration value is calculated as follows:

wherein n001 has a value of 3; i1 When=1, it is related to the coordinate difference; i1 When=2, it is related to the value difference; i1 When=3, it is related to the point mapping difference; Representing the corresponding differential weights; y is _i1 Representing the corresponding difference value, and the value range is [0,1]。

The beneficial effects of the technical scheme are as follows: the first comparison and the second comparison are realized by acquiring the induction track, the moving track and the display track under the same test case, and then, three areas to be confirmed existing on the handwriting board are locked, so that whether the test circuit is qualified or not is analyzed, a basis is provided for subsequent adjustment of the handwriting board, and the integrity of subsequent writing content is ensured.

Example 4:

based on embodiment 3, determining, according to the second comparison result, a point mapping difference between the sensing coordinate set and the display coordinate set of the electromagnetic induction type handwriting board to lock a third area to be confirmed of the electromagnetic induction type handwriting board, including:

As shown in fig. 4, the same sensing coordinate and the same display coordinate are preset corresponding relations between sensing points and display points, and the same sensing coordinate with the corresponding relations is obtained respectively based on the horizontal and vertical direction dispersion sensing and the same display coordinate is based on the horizontal and vertical direction dispersion pixels, for example, the sensing coordinate A1 and the display coordinate A2 have the corresponding relations between points, the horizontal dispersion sensing of the sensing coordinate A1 senses a plurality of sensing sub-points, the vertical dispersion sensing of the sensing sub-points is described in a split manner, the boundary selected by the corresponding pixel point is the corresponding dispersion circle, visual understanding is facilitated, the horizontal dispersion pixel of the display coordinate A2 is the pixel point, the vertical dispersion pixel is the pixel point, at this moment, the outermost boundary selected by the pixel point is the corresponding dispersion circle, for example, the first sensing circle is 01, the first dispersion circle is 02, the second sensing circle is 03, at this moment, the center point of each circle is the corresponding center position.

In this embodiment, the profile deviation refers to the profile difference region between the two matched profiles, as shown in fig. 4, the profile difference 05 of the first induction coil 01 and the first dispersion coil 02.

The beneficial effects of the technical scheme are as follows: the sensing coordinates and the display coordinates are determined to be dispersed based on the horizontal direction and the vertical direction, so that the same-point comparison is carried out, the deviation is carried out from the center position and the outline, the comparison of four deviations is realized, the judgment of the same preset mapping point is realized, the effective acquisition of a third area to be confirmed is ensured, and a basis is provided for the integrity of the writing content of a subsequent certificate.

Example 5:

based on embodiment 3, pre-analyzing the calibration matrix to obtain a modification scheme of the electromagnetic induction handwriting board, which includes:

In this embodiment, the sensing square includes a corresponding sensing coordinate, that is, the corresponding sensing coordinate is a center point of the sensing square, and each sensing coordinate has a corresponding sensing square, so that the sensing square is arranged to obtain the sensing handwriting board.

In this embodiment, each column in the calibration matrix represents an induced coordinate on the handwriting board, and each induced coordinate has a corresponding test condition and is displayed by a calibration value.

In this embodiment, the maximum occupancy element value refers to the maximum calibration value therein.

In this embodiment, the grid distribution is determined based on the inductive coordinates.

In this embodiment, the number of row grid locks is the number of abnormal sensing coordinates in the handwriting board, the number of column grid locks is the number of abnormal times detected by the same sensing coordinate in the handwriting board, and the number of columns of the matrix is related to the sensing coordinates of the handwriting board, if 128 x 128 coordinates exist, then 128 x 128 columns exist.

In this embodiment, for example, the matrix is 2 rows and 2 columns, the first row: 12 second behavior: 02, at this time, the induction coordinate corresponding to 2 is abnormal, the coil at the coordinate is regarded as a main coil to be repaired, and the modification of the coil is regarded as replacement, increase, decrease, etc. of the coil winding number, or adjustment in position, etc.

In this embodiment, the test result database is obtained by testing the handwriting board including different historical test cases.

In this embodiment, the first test information refers to the test result of the coil, that is, the calibration value under different test cases and various test results matched with the calibration value, that is, the results of point mapping, value difference, coordinate difference, and the like.

In this embodiment, the first winding information is related to the number of windings, the magnitude of electromotive force of the windings, and the like.

In this embodiment, the information analysis model is obtained by training samples based on different combinations of test information and winding information and correction suggestions matched with the combination results, so that correction suggestions of the main coil to be corrected can be obtained, and a modification scheme is obtained, wherein the modification scheme is the sum of the modification information corresponding to all the correction coils.

The beneficial effects of the technical scheme are as follows: the number of the rows and the number of the columns are locked, so that the main coil to be modified is effectively determined, and the modification scheme of the corresponding writing board is obtained based on model analysis by obtaining test information and winding information, so that the integrity of the subsequent writing content is ensured.

Example 6:

based on the embodiment 1, when determining that the first display result is that the contour is missing, the process of performing point extension on the missing content to supplement the missing content includes:

In this embodiment, the inconsistency information refers to an inconsistency in the outline where the first display result exists based on the problem result.

In this embodiment, when it is determined that the first display result is that the outline is missing, it is indicated that there may be a problem in the tablet, and at this time, point extension needs to be performed on the missing content to supplement the missing content, so as to determine whether the outline of the filled result is consistent with the outline of the problem result after filling is complete.

In this embodiment, the extending line of the point refers to performing track forward extending on the disconnection point in the inconsistent position information, and after determining the forward extending point connected with the disconnection point, continuously obtaining the next forward extending point based on the forward extending point, so as to obtain the result to be compared by connecting lines.

In this embodiment, the maximum range refers to determining that the result to be compared is inconsistent with the outline on the result of the problem to the greatest extent, so as to obtain a boundary line, where the determination of the boundary line is to determine the incomplete writing portion, so as to facilitate subsequent guidance.

The beneficial effects of the technical scheme are as follows: the existing missing information is determined by acquiring inconsistent information, whether frame selection reminding is needed or not is effectively determined by carrying out contour comparison, and a basis is provided for ensuring the completeness of writing subsequently.

Example 7:

based on the embodiment 1, after the incomplete writing of the frame selection reminder, the method further comprises:

determining a matching coordinate range of the electromagnetic induction handwriting board according to the frame selection prompt, wherein the matching coordinate range is related to the content deletion range;

based on the changed diaphragm voltage, the handwriting is locally cleared.

In this embodiment, when writing is incomplete, a policy is adopted that a complete part is reserved, a part of the incomplete part is eliminated, and in the elimination process, because the related sensing coordinates are different, and the corresponding control switch exists in the sensing coil corresponding to each sensing coordinate, in the elimination process of the part to be eliminated, the corresponding range and the independent and non-independent areas corresponding to the range are determined, so that the adjustment of coil voltage is realized, and the elimination of writing is further realized.

In this embodiment, if the matching coordinate range includes the sensing square corresponding to the sensing coordinate 1, the sensing square is regarded as an independent dividing area, so that voltage control is realized by adjusting the switch matched with the sensing coordinate 1, and handwriting elimination is further realized.

In this embodiment, the non-independent dividing area refers to deleting the lower position handwriting in the induction square corresponding to the induction coordinate 1, and the upper position handwriting needs to be reserved, at this time, voltage adjustment needs to be performed on the voltage of the lower diaphragm of the non-independent area according to actual conditions, for example, after voltage adjustment, the reserved handwriting and the deleted comparison can be eliminated, or the voltage is kept, and then the reserved upper position handwriting and the reserved lower position handwriting can be allowed, so that the overall elimination content is not affected.

In this embodiment, the voltage range adjustment is performed by the first adjusting switch having the smallest control range and including the region boundary corresponding to the non-independent divided region, which means that the voltage range adjustment is performed by the switch allocated by the non-independent divided region.

The beneficial effects of the technical scheme are as follows: the independent dividing regions and the non-independent dividing regions are determined by determining the matching coordinate range, so that voltage adjustment of different coils is realized, the handwriting is locally cleared on the whole, and the writing integrity is ensured.

Example 8:

based on the embodiment 1, the method further comprises:

The beneficial effects of the technical scheme are as follows: the reset key is arranged on the electromagnetic induction handwriting board, so that the overall removal of handwriting is convenient, a foundation is provided for the answer of the next question, and the writing integrity is indirectly ensured.

Example 9:

the invention provides a control system of an electromagnetic induction handwriting board, as shown in fig. 2, comprising:

a display content determining module, configured to determine that writing is to be verified when a first display result is inconsistent with a problem result of the first problem, and determine whether displayed content is missing or displayed content is wrong according to inconsistent information of the first display result and the problem result, where the content missing is that the first display result is compared with a shooting result on a tablet, if the first display result is inconsistent with the shooting result, the content is regarded as missing, if the first display result is consistent with the shooting result on the tablet, the content is regarded as not missing, and if it is determined that the first display result is different from a contour of the problem result of the first problem under the condition that the content is not missing, the content is regarded as wrong;

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The control method of the electromagnetic induction type handwriting board is characterized by comprising the following steps of:

under the condition of content errors, analyzing the error content to reserve a part of correct handwriting, reversely controlling and clearing the handwriting of the part to be cleared on the writing board, simultaneously determining the rest part of correct handwriting which needs to be combined with the reserved part of correct handwriting, and guiding and reminding the rest part of correct handwriting on a display screen;

before the handwriting writing signal of the first problem in the display screen is collected by the target user based on the electromagnetic induction type handwriting board, the method further comprises the following steps:

pre-analyzing the calibration matrix to obtain a modification scheme of the electromagnetic induction handwriting board, and adjusting induction square grids to be modified in the electromagnetic induction handwriting board according to the modification scheme;

according to a second comparison result, determining a point mapping difference between an induction coordinate set and a display coordinate set of the electromagnetic induction type handwriting board to lock a third area to be confirmed of the electromagnetic induction type handwriting board, wherein the third area to be confirmed comprises:

2. The method for controlling an electromagnetic induction type handwriting board according to claim 1, wherein the pre-analyzing the calibration matrix to obtain a modification scheme of the electromagnetic induction type handwriting board comprises:

3. The method for controlling an electromagnetic induction handwriting board according to claim 1, wherein when determining that the first display result is missing, performing point extension on the missing content to supplement the missing content comprises:

Inconsistent information of the first display result and the shooting result on the writing board is obtained, and the inconsistent information is unfolded in an image space form corresponding to the position point, so that a display result is obtained;

when the inconsistent information is the missing information of the first display result based on the shooting result, locking inconsistent position points in the unfolding result, and respectively acquiring the tangential direction and the track forward direction of each inconsistent position point to acquire a point extension line of the corresponding inconsistent position point;

and comparing the result to be compared with the problem result.

4. The method of controlling an electromagnetic-induction handwriting pad according to claim 3, further comprising:

when determining that the content is missing, determining a matching coordinate range of the electromagnetic induction handwriting board, wherein the matching coordinate range is related to the content missing range;

based on the changed diaphragm voltage, the handwriting is locally cleared.

5. The method for controlling an electromagnetic-induction writing pad according to claim 1, further comprising:

6. A control system for an electromagnetic induction writing pad, comprising:

the display content determining module is configured to determine that writing is to be verified when a first display result is inconsistent with a problem result of the first problem, and specifically includes: determining whether displayed content is missing or displayed content is wrong, wherein the content is missing by comparing a first display result with a shooting result on a writing board, if the first display result is inconsistent with the shooting result, the content is regarded as missing, if the first display result is consistent with the shooting result, the content is regarded as not missing, and if the first display result is determined to be different from the outline of a problem result of the first problem under the condition that the content is not missing, the content is regarded as wrong;

the guiding module is used for analyzing the error content to reserve a part of correct handwriting, reversely controlling and clearing the handwriting of the part to be cleared on the writing board, simultaneously determining the rest part of correct handwriting which needs to be combined with the reserved part of correct handwriting, and guiding and reminding the rest part of correct handwriting on the display screen;