CN112462958A - Automatic calibration method for water outlet value based on electromagnetic pen - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 74
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000006870 function Effects 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 9
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- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-N 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000007958 sleep Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 5
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F3/0383—Signal control means within the pointing device
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Abstract
The invention provides an automatic calibration method of a water outlet value based on an electromagnetic pen, which is used for automatically calibrating the water outlet value of the electromagnetic pen, and comprises the following steps of S1: triggering automatic calibration when the electromagnetic pen enters a writing area from the upper part of a writing screen, and testing the working frequency of the electromagnetic pen; step S2: setting an initial water outlet value FOCalculating the working frequency and the initial water outlet value F of the electromagnetic penOThe difference between them; step S3: setting a range interval, and resetting a real-time water outlet value F when the difference falls into the range intervalR(ii) a Step S4: by automatically adjusting the instant water outlet value FRSo that the working frequency and the initial water outlet value FOThe difference between the two lines is reduced, so that the lines drawn by the electromagnetic pen are finer and finer. The method provided by the invention can be used for instantly calibrating the water outlet value of the electromagnetic pen, so that the difference range between the working frequency and the water outlet value is reduced, the lines of the electromagnetic pen are finer and smoother when the electromagnetic pen is used for drawing lines lightly, andand the consistency between lines is high.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of handwriting electromagnetic pens, in particular to an automatic calibration method for a water outlet value based on an electromagnetic pen.
[ background of the invention ]
The electromagnetic ink pen utilizes the touch technology of the electromagnetic screen, so that the electronic track of the pen is recorded while writing on paper, the electronic track can record the writing process and content of the electromagnetic pen, and the electronic track can be conveniently subjected to data processing and storage, and the technology is widely applied to occasions such as classroom teaching and remote education at present.
The electromagnetic pen is characterized in that the frequency change value of the electromagnetic pen is sensitively detected, a set value is generally given, when the working frequency of the electromagnetic pen is measured to be greater than the set value, the electromagnetic pen is considered to be in contact with a writing surface, handwriting can be displayed on a computer screen, and the set value is called a water outlet value; traditional electromagnetism pen goes out water value on the market is a fixed value, and operating frequency manufacturing error is great when the electromagnetism pen hangs, and operating frequency also can change along with the temperature, and this just causes electromagnetism pen operating frequency and goes out water value difference value variation (go out water value setting promptly and need leave very big safe distance with operating frequency between), means that some electromagnetism pens very light power is just gone out water sometimes, need very big power just to go out water sometimes again, leads to user experience very poor.
[ summary of the invention ]
In order to solve the problem that the difference value of the water outlet value of the existing electromagnetic pen is large in change, so that the use is inconvenient, the invention provides an automatic calibration method of the water outlet value based on the electromagnetic pen.
In order to solve the technical problems, the invention provides the following technical scheme: the invention provides an automatic calibration method of a water outlet value based on an electromagnetic pen, which is used for automatically calibrating the water outlet value of the electromagnetic pen and is characterized in that: the method comprises the following steps, step S1: triggering automatic calibration when the electromagnetic pen enters a writing area from the upper part of a writing screen, and testing the working frequency of the electromagnetic pen; step S2: setting an initial water outlet value FOCalculating the working frequency and the initial water outlet value F of the electromagnetic penOThe difference between Δ F; step S3: setting a range interval, and resetting an instant water outlet value F when the difference obtained in step S2 falls into the range intervalR(ii) a Step S4: by automatically adjusting the instant water outlet value FRSo that the working frequency and the initial water outlet value F of the electromagnetic penOThe difference value delta F between the two lines is reduced, so that the drawn lines are finer and finer when the electromagnetic pen is used for drawing lines lightly.
Preferably, the method for automatically calibrating the water outlet value based on the electromagnetic pen further comprises a triggering method of an automatic calibration function, and the method for triggering the automatic calibration comprises the following steps: the auto-calibration function is triggered only when the electromagnetic pen is first detected after the power-on MCU is reset or awakened from a sleep state.
Preferably, or, the method for triggering the automatic calibration is: the auto-calibration function is triggered by making a specified action, including hovering and circling for a long time, using an electromagnetic pen over a specific area.
Preferably, a FLASH memory unit for storing data is arranged in the writing screen, and the initial water outlet value FOIs a constant and is stored in the FLASH storage unit.
Preferably, a data memory for storing data in case of power failure is arranged in the writing screen, and the instant water outlet value FRIs stored in the data memory.
Preferably, the maximum water outlet value F of the electromagnetic pen is calculatedMAXMinimum water outlet value FMINCurrent operating frequency F and minimum safety clearance delta FMIN(ii) a The maximum water outlet value FMAXIs the maximum value of the water outlet value of the electromagnetic pen, and the minimum water outlet value FMINIs the minimum value of the water outlet value of the electromagnetic pen, and the minimum safety clearance delta FMINIs the minimum value of the difference deltaf.
Preferably, the step S2 further includes the steps of: step S21: carrying out one or more real-time measurements on the working frequency of the electromagnetic pen to obtain the current working frequency F; the current working frequency F is obtained by three-point averaging calculation of different working frequencies of the electromagnetic pen at three different time points through a past interference method; the calculation formula of the current working frequency F is as follows: f ═ F1+F2+F3) /3 wherein F1、F2、F3The working frequencies of the electromagnetic pen at different time points are obtained.
Preferably, the step S2 further includes the steps of: step S22: comparing the working frequency of the electromagnetic pen, and when F is more than or equal to FO-ΔFMINOr F is less than or equal to FMINOr F is not less than FMAXAnd directly quitting the automatic calibration.
Preferably, the step S2 further includes the steps of: step S23: when F is presentMIN≤F≤FO-ΔFMINOr FO≤F≤FMAXThen, automatic calibration is carried out, and the instant water outlet value F at the momentR＝F-ΔFMIN。
Preferably, the water outlet value is a preset working frequency value, and when the working frequency of the electromagnetic pen is greater than the water outlet value, it is determined that the electromagnetic pen contacts the writing screen, and the writing screen displays the handwriting of the electromagnetic pen immediately.
Compared with the prior art, the automatic calibration method for the water outlet value based on the electromagnetic pen provided by the invention has the following advantages:
(1) in the method for automatically calibrating the water outlet value based on the electromagnetic pen, a user can unconsciously finish the automatic calibration of the water outlet value of the electromagnetic pen without operating and controlling the electromagnetic pen, when the induction device detects that the handwriting pen (namely, the electromagnetic pen) enters a preset handwriting area from the upper part of a writing surface (namely, a writing screen), the system starts to test the working frequency of the handwriting pen when the handwriting pen is suspended, calculates the difference value between the working frequency when the handwriting pen is suspended and the initial water outlet value, and resets the water outlet value when the difference value reaches a certain range, wherein the new water outlet value is called as an instant water outlet value; it can be understood that the difference between the frequency when the electromagnetic pen is suspended and the water outlet value is gradually reduced by automatically adjusting the water outlet value of the electromagnetic pen for many times, so that the consistency of the lines drawn by the electromagnetic pen is better, and the lines drawn by the electromagnetic pen are finer and smoother when the electromagnetic pen draws light lines through instant calibration, namely the handwriting on the writing screen is displayed more smoothly.
(2) In the method for automatically calibrating the water outlet value based on the electromagnetic pen, the water outlet value is compared with the original water outlet value, namely the currently measured working frequency of the electromagnetic pen is compared with the designed original water outlet value, the original water outlet value is a constant in set software and is stored in a program FLASH, a memory is not required to be additionally added in a system, and the cost is further reduced.
(3) The water outlet value automatic calibration method based on the electromagnetic pen is provided with a plurality of modes for triggering the automatic calibration function, each triggering method has respective characteristics, and a user can select the triggering mode of the automatic calibration function, so that the applicability is high; among the methods for triggering automatic calibration, one method is to automatically calibrate the electromagnetic pen when the electromagnetic pen is detected to appear in a writing area each time, and the method has relatively low reaction speed and report rate, but effectively improves the processing efficiency and reduces the missing rate; among the methods for triggering automatic calibration, one method is to automatically calibrate the water outlet value when the electromagnetic pen is detected for the first time only after the system MCU is reset or awakened from dormancy, so that the method not only effectively improves the working efficiency, but also simplifies the calculation process; furthermore, a user can make a certain action above the writing screen through the handheld electromagnetic pen to trigger the automatic calibration function of the system, such as hovering over the sensing area for a long time, drawing a circle over a specific area and the like, so that the user can easily and conveniently start the automatic calibration function when needing to trigger the automatic calibration function, other complex operations are not needed, and the convenience of the system is greatly improved.
[ description of the drawings ]
Fig. 1 is a schematic block diagram of a flow chart of an automatic calibration method for an effluent value based on an electromagnetic pen according to a first embodiment of the present invention;
fig. 2 is a schematic block diagram of a flow chart of step S2 of a method for automatically calibrating an effluent value based on an electromagnetic pen according to a first embodiment of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Referring to fig. 1-2, a first embodiment of the present invention provides an automatic calibration method for an effluent value of an electromagnetic pen, which is used for automatically calibrating the effluent value of the electromagnetic pen, and is characterized in that: the method comprises the following steps, step S1: triggering automatic calibration when the electromagnetic pen enters a writing area from the upper part of a writing screen, and testing the working frequency of the electromagnetic pen; step S2: setting an initial water outlet value FOCalculating the working frequency and the initial water outlet value F of the electromagnetic penOThe difference between Δ F; step S3: setting a range interval, and resetting an instant water outlet value F when the difference obtained in step S2 falls into the range intervalR(ii) a Step S4: by automatically adjusting the instant water outlet value FRSo that the working frequency and the initial water outlet value F of the electromagnetic penOThe difference value delta F between the two lines is reduced, so that the drawn lines are finer and finer when the electromagnetic pen is used for drawing lines lightly.
Specifically, the electromagnetic handwriting system receives and processes electromagnetic induction signals of the electromagnetic pen, calculates the working frequency of the electromagnetic pen, and determines whether the electromagnetic pen contacts the writing surface and the pressure applied to the electromagnetic pen by a writer according to the working frequency of the electromagnetic pen. The working frequency of the electromagnetic pen changes along with the pressure in two ways: one is that the working frequency of the electromagnetic pen increases with increasing pressure (positive correlation), and the other is that the working frequency of the electromagnetic pen decreases with increasing pressure (negative correlation) (positive correlation is mainly used in the following description, and the negative correlation is similar). Generally, a set value is given first, and for a positive correlation mode, when the measured working frequency is greater than the set value, the electromagnetic pen is considered to be in contact with a writing surface, handwriting can be displayed on a computer screen, and the set value is conventionally called as a water outlet value.
It can be understood that, in the method for automatically calibrating a water outlet value based on an electromagnetic pen provided in the first embodiment of the present invention, the automatic calibration of the water outlet value of the electromagnetic pen can be unconsciously completed without the user performing operation control on the electromagnetic pen, when the sensing device detects that the handwriting pen (i.e., the electromagnetic pen) enters a preset handwriting area from above the writing surface (i.e., the writing screen), the system starts to test the working frequency of the handwriting pen when the handwriting pen is suspended, and calculates the difference between the working frequency when the handwriting pen is suspended and the initial water outlet value, when the difference reaches a certain range, a water outlet value is reset, and the new water outlet value is called an instant water outlet value; it can be understood that the difference between the frequency when the electromagnetic pen is suspended and the water outlet value is gradually reduced by automatically adjusting the water outlet value of the electromagnetic pen for many times, so that the consistency of the lines drawn by the electromagnetic pen is better, and the lines drawn by the electromagnetic pen are finer and smoother when the electromagnetic pen draws light lines through instant calibration, namely the handwriting on the writing screen is displayed more smoothly.
Specifically, the method for automatically calibrating the water outlet value based on the electromagnetic pen further comprises a triggering method of an automatic calibration function, and the method for triggering the automatic calibration comprises the following steps: the auto-calibration function is triggered only when the electromagnetic pen is first detected after the power-on MCU is reset or awakened from a sleep state.
Specifically, or, the method for triggering the automatic calibration is as follows: the auto-calibration function is triggered by making a specified action, including hovering and circling for a long time, using an electromagnetic pen over a specific area.
Specifically, a FLASH storage unit for storing data is arranged in the writing screen, and the initial water outlet value FOIs a constant and is stored in the FLASH storage unit; it can be understood that, compared with the original water outlet value, that is, the currently measured working frequency of the electromagnetic pen is compared with the designed original water outlet value, the original water outlet value is a constant in the set software and is stored in the program FLASH, and no additional memory is required to be added in the system, thereby further reducing the cost.
Specifically, a data memory for storing data in case of power failure is arranged in the writing screen, and the instant water outlet value FRIs stored in the data memory.
Specifically, the maximum water outlet value F of the electromagnetic pen is calculatedMAXMinimum water outlet value FMINCurrent operating frequency F and minimum safety clearance delta FMIN(ii) a The maximum water outlet value FMAXIs an electromagnetic penMaximum value of water value, said minimum water outlet value FMINIs the minimum value of the water outlet value of the electromagnetic pen, and the minimum safety clearance delta FMINIs the minimum value of the difference deltaf.
With continued reference to fig. 2, the step S2 further includes the following steps: step S21: carrying out one or more real-time measurements on the working frequency of the electromagnetic pen to obtain the current working frequency F; the current working frequency F is obtained by three-point averaging calculation of different working frequencies of the electromagnetic pen at three different time points through a past interference method; the calculation formula of the current working frequency F is as follows: f ═ F1+F2+F3) /3 wherein F1、F2、F3The working frequencies of the electromagnetic pen at different time points are obtained.
Specifically, the step S2 further includes the following steps: step S22: firstly, the judgment is made, when F is more than or equal to FO-ΔFMINOr F is less than or equal to FMINOr F is not less than FMAXAnd (4) directly exiting automatic calibration (calibration is not needed when the water outlet value is normal or the damage frequency of the electromagnetic pen deviates excessively).
Specifically, the step S2 further includes the following steps: step S23: when F is presentMIN≤F≤FO-ΔFMIN(in this case, the working frequency of the electromagnetic pen is deviated a lot, the light line is not easy to discharge water, and the problem of excessive water discharge pressure can be solved through automatic adjustment), or FO≤F≤FMAX(in this case, the electromagnetic pen is due to the original water output value FOUnreasonable setting and water leakage, can solve the problem of water leakage of the electromagnetic pen through automatic adjustment), calibration needs to be implemented, and the instant water outlet value FR＝F-ΔFMIN。
Furthermore, the method for automatically calibrating the water output value based on the electromagnetic pen provided by the first embodiment of the invention is provided with a plurality of ways for triggering the automatic calibration function, each triggering method has respective characteristics, and a user can select the triggering way of the automatic calibration function, so that the applicability is strong; among the methods for triggering automatic calibration, one method is to automatically calibrate the electromagnetic pen when the electromagnetic pen is detected to appear in a writing area each time, and the method has relatively low reaction speed and report rate, but effectively improves the processing efficiency and reduces the missing rate; among the methods for triggering automatic calibration, one method is to automatically calibrate the water outlet value when the electromagnetic pen is detected for the first time only after the system MCU is reset or awakened from dormancy, so that the method not only effectively improves the working efficiency, but also simplifies the calculation process; furthermore, a user can make a certain action above the writing screen through the handheld electromagnetic pen to trigger the automatic calibration function of the system, such as hovering over the sensing area for a long time, drawing a circle over a specific area and the like, so that the user can easily and conveniently start the automatic calibration function when needing to trigger the automatic calibration function, other complex operations are not needed, and the convenience of the system is greatly improved.
Specifically, the water outlet value is a preset working frequency value, and when the working frequency of the electromagnetic pen is greater than the water outlet value, the electromagnetic pen is judged to be in contact with the writing screen, and the writing screen displays the handwriting of the electromagnetic pen immediately.
Compared with the prior art, the automatic calibration method for the water outlet value based on the electromagnetic pen provided by the invention has the following advantages:
(1) in the method for automatically calibrating the water outlet value based on the electromagnetic pen, a user can unconsciously finish the automatic calibration of the water outlet value of the electromagnetic pen without operating and controlling the electromagnetic pen, when the induction device detects that the handwriting pen (namely, the electromagnetic pen) enters a preset handwriting area from the upper part of a writing surface (namely, a writing screen), the system starts to test the working frequency of the handwriting pen when the handwriting pen is suspended, calculates the difference value between the working frequency when the handwriting pen is suspended and the initial water outlet value, and resets the water outlet value when the difference value reaches a certain range, wherein the new water outlet value is called as an instant water outlet value; it can be understood that the difference between the frequency when the electromagnetic pen is suspended and the water outlet value is gradually reduced by automatically adjusting the water outlet value of the electromagnetic pen for many times, so that the consistency of the lines drawn by the electromagnetic pen is better, and the lines drawn by the electromagnetic pen are finer and smoother when the electromagnetic pen draws light lines through instant calibration, namely the handwriting on the writing screen is displayed more smoothly.
(2) In the method for automatically calibrating the water outlet value based on the electromagnetic pen, the water outlet value is compared with the original water outlet value, namely the currently measured working frequency of the electromagnetic pen is compared with the designed original water outlet value, the original water outlet value is a constant in set software and is stored in a program FLASH, a memory is not required to be additionally added in a system, and the cost is further reduced.
(3) The water outlet value automatic calibration method based on the electromagnetic pen is provided with a plurality of modes for triggering the automatic calibration function, each triggering method has respective characteristics, and a user can select the triggering mode of the automatic calibration function, so that the applicability is high; among the methods for triggering automatic calibration, one method is to automatically calibrate the electromagnetic pen when the electromagnetic pen is detected to appear in a writing area each time, and the method has relatively low reaction speed and report rate, but effectively improves the processing efficiency and reduces the missing rate; among the methods for triggering automatic calibration, one method is to automatically calibrate the water outlet value when the electromagnetic pen is detected for the first time only after the system MCU is reset or awakened from dormancy, so that the method not only effectively improves the working efficiency, but also simplifies the calculation process; furthermore, a user can make a certain action above the writing screen through the handheld electromagnetic pen to trigger the automatic calibration function of the system, such as hovering over the sensing area for a long time, drawing a circle over a specific area and the like, so that the user can easily and conveniently start the automatic calibration function when needing to trigger the automatic calibration function, other complex operations are not needed, and the convenience of the system is greatly improved.
Claims (10)
1. An automatic calibration method of a water outlet value based on an electromagnetic pen is used for automatically calibrating the water outlet value of the electromagnetic pen, and is characterized in that: the method comprises the following steps of,
step S1: triggering automatic calibration when the electromagnetic pen enters a writing area from the upper part of a writing screen, and testing the working frequency of the electromagnetic pen;
step S2: setting an initial water outlet value FOCalculating the working frequency and the initial water outlet value F of the electromagnetic penOThe difference between Δ F;
step S3: setting a range interval, and resetting an instant water outlet value F when the difference obtained in step S2 falls into the range intervalR；
Step S4: by automatically adjusting the instant water outlet value FRSo that the working frequency and the initial water outlet value F of the electromagnetic penOThe difference value delta F between the two lines is reduced, so that the drawn lines are finer and finer when the electromagnetic pen is used for drawing lines lightly.
2. The method for automatically calibrating the water outlet value based on the electromagnetic pen as claimed in claim 1, wherein: the automatic calibration method of the water outlet value based on the electromagnetic pen further comprises a triggering method of an automatic calibration function, wherein the method for triggering the automatic calibration comprises the following steps: the auto-calibration function is triggered only when the electromagnetic pen is first detected after the power-on MCU is reset or awakened from a sleep state.
3. The electromagnetic pen-based automatic calibration method for the water outlet value as claimed in claim 2, wherein: or, the method for triggering automatic calibration comprises the following steps: the auto-calibration function is triggered by making a specified action, including hovering and circling for a long time, using an electromagnetic pen over a specific area.
4. The method for automatically calibrating the water outlet value based on the electromagnetic pen as claimed in claim 1, wherein: a FLASH storage unit for storing data is arranged in the writing screen, and the initial water outlet value FOIs a constant and is stored in the FLASH storage unit.
5. The method for automatically calibrating the water outlet value based on the electromagnetic pen as claimed in claim 1, wherein: the writing screen is internally provided with a data memory for storing data in case of power failure, and the instant water outlet value FRIs stored in the data memory.
6. The electromagnetic pen-based water outlet value meter as claimed in claim 1The dynamic calibration method is characterized by comprising the following steps: calculating to obtain the maximum water outlet value F of the electromagnetic penMAXMinimum water outlet value FMINCurrent operating frequency F and minimum safety clearance delta FMIN；
The maximum water outlet value FMAXIs the maximum value of the water outlet value of the electromagnetic pen, and the minimum water outlet value FMINIs the minimum value of the water outlet value of the electromagnetic pen, and the minimum safety clearance delta FMINIs the minimum value of the difference deltaf.
7. The electromagnetic pen-based automatic calibration method for the water outlet value as claimed in claim 6, wherein: the step S2 further includes the steps of:
step S21: carrying out one or more real-time measurements on the working frequency of the electromagnetic pen to obtain the current working frequency F;
the current working frequency F is obtained by three-point averaging calculation of different working frequencies of the electromagnetic pen at three different time points through a past interference method;
the calculation formula of the current working frequency F is as follows: f ═ F1+F2+F3) /3 wherein F1、F2、F3The working frequencies of the electromagnetic pen at different time points are obtained.
8. The electromagnetic pen-based automatic calibration method for the water outlet value as claimed in claim 7, wherein: the step S2 further includes the steps of:
step S22: comparing the working frequency of the electromagnetic pen, and when F is more than or equal to FO-ΔFMINOr F is less than or equal to FMINOr F is not less than FMAXAnd directly quitting the automatic calibration.
9. The electromagnetic pen-based automatic calibration method for the water outlet value as claimed in claim 8, wherein: the step S2 further includes the steps of:
step S23: when F is presentMIN≤F≤FO-ΔFMINOr FO≤F≤FMAXThen, automatic calibration is performedInstant water outlet value FR＝F-ΔFMIN。
10. The method for automatically calibrating the water outlet value based on the electromagnetic pen as claimed in claim 1, wherein: the water outlet value is a preset working frequency value, when the working frequency of the electromagnetic pen is greater than the water outlet value, the electromagnetic pen is judged to be in contact with the writing screen, and the writing screen displays the handwriting of the electromagnetic pen immediately.
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| CN109582161A (en) * | 2018-12-06 | 2019-04-05 | 深圳市天美意科技有限公司 | The reference frequency automatic calibrating method of time writer |
| CN109656390A (en) * | 2018-12-06 | 2019-04-19 | 深圳市天美意科技有限公司 | The reference frequency automatic calibrating method of time writer |
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