CN112486345A - Processing method, device, terminal and storage medium for active pen writing abnormity - Google Patents
Processing method, device, terminal and storage medium for active pen writing abnormity Download PDFInfo
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- CN112486345A CN112486345A CN202110139489.0A CN202110139489A CN112486345A CN 112486345 A CN112486345 A CN 112486345A CN 202110139489 A CN202110139489 A CN 202110139489A CN 112486345 A CN112486345 A CN 112486345A
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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
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The application discloses a processing method, a device, a terminal and a storage medium for active pen writing abnormity, wherein the method comprises the following steps: when the active pen is powered on, a first pressure value of a pen point is obtained through a pressure sensor, and the first pressure value is used as a first return-to-zero reference value; when abnormal writing is detected, a second pressure value of the pen point and an acceleration value of the active pen are obtained at set time intervals, and if the second pressure value is not changed and the acceleration value meets set conditions, the second pressure value is used as a second return-to-zero reference value; when the abnormal writing is detected again, acquiring a pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, and taking the third pressure value as a third zero reference value; and writing based on the threshold value corresponding to the zero reference value. Through operations such as power-on calibration, pressure return to zero, negative value updating and the like, the problem that handwriting can appear on a screen when an active pen is not in contact with the screen is solved, and normal writing is guaranteed.
Description
Technical Field
The application relates to the technical field of intelligent pens, in particular to a method, a device, a terminal and a storage medium for processing active pen writing abnormity.
Background
The existing active pen adopting the prepressing scheme has errors in the calibration process, when the active pen does not write, the sensor (pressure sensor) and the amplifier inside the active pen can be influenced by temperature or structural parts and the like within a certain time, the offset phenomenon occurs, and the pen point has certain stress, so that the detected ADC value is increased, namely the detected ADC value can exceed the set threshold value, at the moment, the active pen is not in contact with the screen, but handwriting can occur on the screen, and the phenomenon is called as water leakage phenomenon. The existing active pen is not effectively solved when the water leakage phenomenon occurs, so that an effective mode for solving the water leakage phenomenon of the active pen adopting the prepressing scheme is urgently needed.
Disclosure of Invention
The embodiment of the application provides a processing method, a device, a terminal and a storage medium for abnormal writing of an active pen, and aims to solve the problem that handwriting can appear on a screen when the active pen is not in contact with the screen.
In order to achieve the above object, an aspect of the present application provides a method for processing an active pen writing exception, where the method for processing an active pen writing exception includes the following steps:
when the active pen is powered on, acquiring a first pressure value of a pen point through a pressure sensor, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
when abnormal writing is detected, acquiring a second pressure value of the pen point and an acceleration value of the active pen at set intervals, and if the second pressure value is unchanged and the acceleration value meets set conditions, taking the second pressure value as a second zero reference value and writing based on the second zero reference value;
and when the abnormal writing is detected again, acquiring the pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
Optionally, the obtaining a second pressure value of the pen tip and an acceleration value of the active pen at set intervals, and if the second pressure value is not changed and the acceleration value satisfies a set condition, taking the second pressure value as a second return-to-zero reference value, and writing based on the second return-to-zero reference value includes:
acquiring a second pressure value of the pen point at set time intervals, and acquiring a second pressure value which changes within the set time;
acquiring acceleration values respectively corresponding to three axes of the active pen through a gravity sensor within the set time, wherein the three axes are an x axis, a y axis and a z axis respectively;
if the number of the second pressure values which change within the set time is smaller than the set number and the acceleration value is smaller than the set threshold value, taking the second pressure values as a second return-to-zero reference value;
and updating the set threshold value according to the second zeroing reference value to obtain a first threshold value, and writing based on the first threshold value.
Optionally, the step of writing based on the first zero reference value with the first pressure value as the first zero reference value includes:
obtaining an average value corresponding to the first pressure value, and comparing the average value with the set threshold value;
if the average value is smaller than or larger than the set threshold value, taking the average value as the first return-to-zero reference value;
and updating the set threshold value according to the first zeroing reference value to obtain a second threshold value, and writing based on the second threshold value.
Optionally, after the step of updating the set threshold value according to the second zeroing reference value to obtain a first threshold value and writing based on the first threshold value, the method includes:
after the set time, acquiring a second pressure value of the pen point and an acceleration numerical value of the active pen;
and if the second pressure value and the acceleration value are not changed, entering a dormant state.
Optionally, if the pressure value is a negative value, obtaining a third pressure value of the pen tip, and taking the third pressure value as a third return-to-zero reference value, where the writing based on the third return-to-zero reference value includes:
if the obtained pressure value is smaller than a return-to-zero reference value, determining that the pressure value is a negative value;
acquiring a third pressure value corresponding to the pen point without external force, and taking the third pressure value as a third zero reference value;
and updating the set threshold value according to the third zero-return reference value to obtain a third threshold value, and writing based on the third threshold value.
Optionally, after the step of obtaining a pressure value of the pen tip when the writing abnormality is detected again, and if the pressure value is a negative value, obtaining a third pressure value of the pen tip, and taking the third pressure value as a third return-to-zero reference value, and writing based on the third return-to-zero reference value, the method includes:
detecting a pressure value of the pen point through the pressure sensor at intervals of a first set time under the condition that the active pen is in a non-pressure state;
refreshing the detected pressure value.
Optionally, when the active pen is powered on, the step of obtaining a first pressure value of the pen tip through a pressure sensor, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value includes:
and contacting the pressure sensor with a set chip to enable the active pen to be in a prepressing state.
In addition, to achieve the above object, another aspect of the present application further provides an apparatus for handling an active pen writing exception, the apparatus comprising:
the acquisition module is used for acquiring a first pressure value of a pen point through a pressure sensor when the active pen is powered on, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
the first detection module is used for acquiring a second pressure value of the pen point and an acceleration value of the active pen at set time intervals when abnormal writing is detected, and if the second pressure value is unchanged and the acceleration value meets set conditions, the second pressure value is used as a second zero reference value, and writing is performed based on the second zero reference value;
and the second detection module is used for acquiring the pressure value of the pen point when the writing abnormity is detected again, acquiring a third pressure value of the pen point if the pressure value is a negative value, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
In addition, in order to achieve the above object, in another aspect of the present application, a terminal is further provided, where the terminal includes a memory, a processor, and a processing program of an active pen writing exception, where the processing program of the active pen writing exception is stored in the memory and runs on the processor, and the processor implements the steps of the processing method of the active pen writing exception as described above when executing the processing program of the active pen writing exception.
In addition, to achieve the above object, another aspect of the present application further provides a computer-readable storage medium, where a program for handling an active pen writing exception is stored, and when the program for handling an active pen writing exception is executed by a processor, the method for handling an active pen writing exception as described above is implemented.
In the embodiment, when the active pen is powered on, a first pressure value of a pen point is obtained through a pressure sensor, and the first pressure value is used as a first return-to-zero reference value; when abnormal writing is detected, a second pressure value of the pen point and an acceleration value of the active pen are obtained at set time intervals, and if the second pressure value is not changed and the acceleration value meets set conditions, the second pressure value is used as a second return-to-zero reference value; when the abnormal writing is detected again, acquiring a pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, and taking the third pressure value as a third zero reference value; and writing based on the threshold value corresponding to the zero reference value. Through operations such as power-on calibration, pressure return to zero, negative value updating and the like, the problem that handwriting can appear on a screen when an active pen is not in contact with the screen is solved, and normal writing is guaranteed.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating a first embodiment of a method for handling an abnormal writing of an active pen according to the present application;
FIG. 3 is a flowchart illustrating a second embodiment of a method for handling an abnormal writing operation of an active pen according to the present application;
fig. 4 is a schematic flow chart illustrating that the first pressure value is used as a first return-to-zero reference value and writing is performed based on the first return-to-zero reference value in the method for processing writing abnormality of the active pen according to the present application;
fig. 5 is a schematic flow chart illustrating a process of acquiring a second pressure value of the pen tip and an acceleration value of the active pen at set time intervals in the method for processing writing abnormality of the active pen, and writing based on the second return-to-zero reference value by using the second pressure value as the second return-to-zero reference value if the second pressure value is unchanged and the acceleration value meets a set condition;
fig. 6 is a schematic flow chart illustrating a step after a step of updating a set threshold value according to the second zeroing reference value to obtain a first threshold value and writing based on the first threshold value in the method for processing writing abnormality of the active pen according to the present application;
fig. 7 is a schematic flow chart illustrating that, in the method for processing writing abnormality of the active pen according to the present application, if the pressure value is a negative value, a third pressure value of the pen point is obtained, and writing is performed based on the third return-to-zero reference value by using the third pressure value as the third return-to-zero reference value.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The main solution of the embodiment of the application is as follows: when the active pen is powered on, acquiring a first pressure value of a pen point through a pressure sensor, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value; when abnormal writing is detected, acquiring a second pressure value of the pen point and an acceleration value of the active pen at set intervals, and if the second pressure value is unchanged and the acceleration value meets set conditions, taking the second pressure value as a second zero reference value and writing based on the second zero reference value; and when the abnormal writing is detected again, acquiring the pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
Because the existing initiative pen adopting the prepressing scheme has a water leakage phenomenon, when the initiative pen is not in contact with a screen, handwriting can appear on the screen, and meanwhile, the problem cannot be effectively solved. When the active pen is powered on, a first pressure value of a pen point is obtained through the pressure sensor, and the first pressure value is used as a first return-to-zero reference value; when abnormal writing is detected, a second pressure value of the pen point and an acceleration value of the active pen are obtained at set time intervals, and if the second pressure value is not changed and the acceleration value meets set conditions, the second pressure value is used as a second return-to-zero reference value; when the abnormal writing is detected again, acquiring a pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, and taking the third pressure value as a third zero reference value; and writing based on the threshold value corresponding to the zero reference value. Through operations such as power-on calibration, pressure return to zero, negative value updating and the like, the problem that handwriting can appear on a screen when an active pen is not in contact with the screen is solved, and normal writing is guaranteed.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present application.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, a remote controller, an audio circuit, a WiFi module, a detector, and the like. Of course, the terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer and a temperature sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 does not constitute a limitation of the terminal device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer-readable storage medium, may include therein an operating system, a network communication module, a user interface module, and a handler of an active pen writing exception.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call a handler for the active pen writing exception in the memory 1005, and perform the following operations:
when the active pen is powered on, acquiring a first pressure value of a pen point through a pressure sensor, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
when abnormal writing is detected, acquiring a second pressure value of the pen point and an acceleration value of the active pen at set intervals, and if the second pressure value is unchanged and the acceleration value meets set conditions, taking the second pressure value as a second zero reference value and writing based on the second zero reference value;
and when the abnormal writing is detected again, acquiring the pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating a first embodiment of a method for handling writing anomalies of an active pen according to the present application.
While a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than here.
The method for processing the writing exception of the initiative pen comprises the following steps:
step S10, when the active pen is powered on, a first pressure value of a pen point is obtained through a pressure sensor, the first pressure value is used as a first zero reference value, and writing is carried out based on the first zero reference value;
the application environment of the method provided in this embodiment is to apply the method to an active pen using a pre-pressing scheme, where the active pen using the pre-pressing scheme refers to that a sensor (pressure sensor) with a glass aperture and a TPU (set chip) are in contact with each other, which is called pre-pressing, and if the sensor (pressure sensor) with the glass aperture and the TPU (set chip) are not in contact with each other, which is called non-pre-pressing. The active pen adopts a prepressing scheme, namely, the pressure sensor is in contact with the TPU (set chip) so that the active pen is in a prepressing state. The initiative pen adopting the prepressing scheme has a water leakage phenomenon, namely, when the initiative pen is not in contact with a screen, handwriting is displayed on the screen. Further causes of "water leakage" include: lifting the screen after being pressed, pulling the pen core outwards with force, rotating the pen core, throwing the pen with force, screwing the rear cover on the battery, aging hardware, temperature drift and the like.
The active pen is also called a capacitive Stylus (Stylus), and works through a coupling capacitor between the front end of the pen core and a Touch Panel (TP), so that the active pen is called a capacitive Stylus; the active pen is provided with a pressure sensor, and the pressure sensor is used for detecting the pressure of the active pen on the touch screen, so that the active pen can detect the change of the writing strength of a user, and the touch screen can change the thickness of handwriting according to the change of the writing strength.
Under normal conditions, when the active pen does not write, the pressure applied to the sensor (pressure sensor) is not changed, that is, the ADC value is not changed, but the active pen has calibration errors, temperature drift and other reasons, so that a water leakage phenomenon occurs. Specifically, the battery of the active pen records a current pressure value at the moment of power-on, the pressure sensor is controlled to acquire 10 ADC values through 10 frames, wherein the time of one frame is 7.5ms, that is, one ADC value is acquired every 7.5ms, the acquired 10 ADC values are averaged, and the average value is used as a first return-to-zero reference value. For example: the acquired ADC values are a1, a 2.. a10, an average value of the acquired ADC values is further calculated, an average value B1 is obtained as (a 1+ a 2.. a 10)/10, the average value B1 is used as a first zero reference value, and writing is performed based on the first zero reference value.
Further, the active pen is also preset with a corresponding ADC threshold (pressure threshold), and in the writing process, the used pressure needs to exceed the threshold to discharge water, for example, 30 ADCs are set as the thresholds, and the corresponding gram weight of writing is 10g or 25 g. After calculating the average value of 10 ADC values, the average value needs to be compared with a threshold value to determine whether a calibration operation needs to be performed, referring to fig. 4, the step of writing based on the first return-to-zero reference value by using the first pressure value as the first return-to-zero reference value includes:
step S11, obtaining an average value corresponding to the first pressure value, and comparing the average value with the set threshold value;
step S12, if the average value is smaller than or greater than the set threshold value, taking the average value as the first return-to-zero reference value;
and step S13, updating the set threshold value according to the first zero reference value to obtain a second threshold value, and writing based on the second threshold value.
And comparing the average value obtained by current calculation with a set threshold value, and if the average value is smaller than or larger than the set threshold value, indicating that the current difference is large and the reference value needs to be updated. In an embodiment, if the currently calculated average value is 10 ADCs and the threshold value is 30 ADCs, it indicates that the current difference is large, 10 is used as a first return-to-zero reference value, that is, 10 is regarded as 0 for processing, the threshold value is updated, and the threshold value is updated to 40 ADCs, that is, 40 ADCs are obtained by adding a preset threshold value 30 on the basis of the return-to-zero processing; the difference between the average value and the threshold value is not changed, but the threshold value is raised upwards, that is, the difference between the average value and the original threshold value is 20, after the average value 10 is treated as 0, the corresponding average value is 20, the updated threshold value is 40, and the difference between the two values is still 20, that is, the difference between the two values is not changed. Writing is performed based on the updated threshold value, and if the updated threshold value is 40, the pressure value of the user during writing needs to be greater than 40 ADCs.
Further, after the new active pen is powered on and calibrated, pressure value calibration is recommended to be carried out again after 5S/10S/30S, and the currently acquired pressure value is used as a reference to return to zero.
Step S20, when abnormal writing is detected, a second pressure value of the pen point and an acceleration value of the active pen are obtained at set time intervals, if the second pressure value is not changed and the acceleration value meets set conditions, the second pressure value is used as a second zero reference value, and writing is carried out based on the second zero reference value;
after the active pen is electrified and calibrated, continuously detecting that water leakage occurs, if the water leakage occurs, performing pressure return-to-zero processing, specifically, setting a constant time, such as 30S, detecting an ADC (analog to digital converter) value, namely a second pressure value, generated by the pen point of the active pen at intervals of 30S through a pressure sensor, and acquiring an acceleration value through a gravity sensor; and if the second pressure value is not changed and the acceleration value meets the set condition, carrying out zero returning processing on the second pressure value. For example: if the ADC value detected within the constant time 30S is 20, the ADC value 20 is regarded as 0, and the corresponding threshold value is updated, that is, the threshold value (e.g., 30) is added to the ADC value 20, so that the updated threshold value is 50, and writing is performed based on the threshold value.
Further, referring to fig. 5, the acquiring a second pressure value of the pen tip and an acceleration value of the active pen at set intervals, if the second pressure value is not changed and the acceleration value satisfies a set condition, taking the second pressure value as a second return-to-zero reference value, and writing based on the second return-to-zero reference value includes:
step S21, acquiring a second pressure value of the pen point at set time intervals, and acquiring a second pressure value which changes within the set time;
step S22, acquiring acceleration values corresponding to three axes of the active pen respectively through a gravity sensor within the set time, wherein the three axes are an x axis, a y axis and a z axis respectively;
step S23, if the number of the second pressure values that change within the set time is smaller than the set number, and the acceleration value is smaller than the set threshold value, taking the second pressure value as a second return-to-zero reference value;
and step S24, updating the set threshold value according to the second zero reference value to obtain a first threshold value, and writing based on the first threshold value.
When the active pen detects the second pressure value at every set time (e.g. 30S), a plurality of second pressure values, i.e. a plurality of ADC values, are detected within 30S, and further, the ADC values that change within 30S need to be counted to determine whether the pressure applied to the active pen within 30S is constant. Secondly, a Gsense (gravity sensor) is arranged in the active pen, when the active pen is shaken, data collected by three axes (x, y, z) of the gravity sensor is changed at a high speed, and acceleration values corresponding to the three axes (x axis, y axis and z axis) are returned. After receiving the acceleration value fed back by the gravity sensor, the active pen judges the current state based on the acceleration value, for example: if the acceleration value changes, the active pen is in a writing state; if the acceleration value is not changed, the active pen is in a static state.
After the number of the second pressure values and the acceleration value which change within 30S are obtained, whether the number of the second pressure values and the acceleration value meet corresponding set conditions or not is respectively judged, and if yes, zeroing processing is performed, and the corresponding threshold value is updated. In one embodiment, if the second pressure value changed within 30S exceeds 3, it indicates that the current pressure is not constant, and the active pen does not process the current pressure; if the second pressure value that changes within 30S is within 3, the pressure is considered to be constant. And further judging whether the acceleration value (x, y, z) is smaller than a set threshold value, such as (2, 3, 4), if so, considering that the active pen is in a static state, and if so, considering that the active pen is in a writing state. And when the active pen simultaneously meets that the second pressure value changed within 30S is within 3 and the acceleration value is smaller than the set threshold value, performing zeroing processing, updating the threshold value to obtain a first threshold value, and writing based on the first threshold value.
Further, referring to fig. 6, after the step of updating the set threshold value according to the second zeroing reference value to obtain the first threshold value and writing based on the first threshold value, the method includes:
step S25, after the set time, acquiring a second pressure value of the pen point and an acceleration value of the active pen;
and step S26, if the second pressure value and the acceleration value are not changed, entering a sleep state.
Because the active pen is generally powered by a battery, in order to save power consumption, the active pen continues to detect the second pressure value through the pressure sensor after the constant time is 30S, and detects the acceleration value through the gravity sensor, and if the second pressure value and the acceleration value detected after the constant time is 30S are not changed, the active pen enters a dormant state.
And step S30, when the abnormal writing is detected again, acquiring a pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
After the pressure of the active pen is reset to zero, whether the water leakage phenomenon occurs or not can be continuously detected, if the water leakage phenomenon occurs, the current ADC value is detected, and if the detected ADC value is a negative value, the current active pen is in a stuck state or a user presses a pen core by using an object, so that the stress of the active pen is large. And acquiring a third pressure value after the active pen returns to the normal state, carrying out zero treatment on the third pressure value, and updating a corresponding threshold value. Referring to fig. 7, if the pressure value is a negative value, acquiring a third pressure value of the pen tip, and taking the third pressure value as a third return-to-zero reference value, where the writing based on the third return-to-zero reference value includes:
step S31, if the obtained pressure value is smaller than a return-to-zero reference value, determining that the pressure value is a negative value;
step S32, acquiring a third pressure value corresponding to the pen point without external force, and taking the third pressure value as a third zero reference value;
and step S33, updating the set threshold value according to the third zero-setting reference value to obtain a third threshold value, and writing based on the third threshold value.
The ADC sampling value of the active pen under the condition of setting the maximum prepressing value (return-to-zero absolute value +2 units in the semi-finished product burning stage) is C, when the Chinese angelica zero reference value is larger than C, the force sensor is considered to have constant extra pressure at the moment, and when the obtained pressure value at the next moment is smaller than the return-to-zero reference value, the return-to-zero reference value is immediately adjusted to be the currently obtained pressure value, namely a third pressure value, so that the negative value is updated to be real-time, and the updating can be continuously carried out. In one embodiment, in the pre-pressing scheme, if the pre-pressing ADC value at the PCBA (semi-finished product) stage is 30, then 30 is regarded as 0, and when the actual value is detected to be 35, then the 5 extra ADC values are regarded as generated by the external force, i.e. the pressure value received is a negative value. For example: if the ADC value of the threshold of the pressure sensor for starting the active pen is set to be 30, when the refill is stuck or a student presses the refill with a book, the force applied to the refill is larger, and if the MCU detects that the ADC value is 200, the 200 is reset to zero (namely, water can be discharged after the ADC value is increased to 230 on the basis of the 30 threshold). When the refill is not locked (rebounded) or the student opens the refill of the book without stress, the MCU detects that the ADC value is possibly only 10, if 10 is not taken as a reference value, the refill is stressed by a great force, water can be discharged, and the water can be discharged only when the ADC value exceeds 230. Therefore, the ADC value detected after the pen refill is not stressed needs to be used as the return-to-zero reference value, that is, 10 is used as the return-to-zero reference value, and the corresponding threshold value is 40, and at this time, water can be discharged when the ADC value written by the user exceeds 40. After the active pen performs negative value updating, 10 frames are sent and return to zero within 75ms of power-on.
When the active pen is powered on, a first pressure value of a pen point is obtained through a pressure sensor, and the first pressure value is used as a first return-to-zero reference value; when abnormal writing is detected, a second pressure value of the pen point and an acceleration value of the active pen are obtained at set time intervals, and if the second pressure value is not changed and the acceleration value meets set conditions, the second pressure value is used as a second return-to-zero reference value; when the abnormal writing is detected again, acquiring a pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, and taking the third pressure value as a third zero reference value; and writing based on the threshold value corresponding to the zero reference value. Through operations such as power-on calibration, pressure return to zero, negative value updating and the like, the problem that handwriting can appear on a screen when an active pen is not in contact with the screen is solved, and normal writing is guaranteed.
Further, referring to fig. 3, a second embodiment of the method for handling writing abnormality of an active pen according to the present application is provided.
The second embodiment of the method for processing an abnormality in active pen writing is different from the first embodiment of the method for processing an abnormality in active pen writing in that, after the step of acquiring the pressure value of the pen tip when the abnormality in writing is detected again, acquiring a third pressure value of the pen tip if the pressure value is a negative value, and writing based on the third return-to-zero reference value by using the third pressure value as a third return-to-zero reference value, the method comprises:
step S34, detecting the pressure value of the pen point by the pressure sensor at intervals of first set time under the condition that the active pen is in no pressure;
and step S35, refreshing the detected pressure value.
The pressure value is detected by the pressure sensor at intervals of first set time (such as 200 ms) when the active pen is not subjected to external force, and the obtained pressure value is refreshed, so that the temperature drift problem of the PCB and the environmental temperature difference problem are solved.
This embodiment is under the no pressure condition, and every interval a period detects the pressure value and refreshes for can in time solve PCB board temperature drift problem and ambient temperature difference problem.
In an embodiment, the processing apparatus for active pen writing exception includes a memory, a processor, and a processing program for active pen writing exception, where the processing program for active pen writing exception is stored in the memory and can be run on the processor, and when executed by the processor, the processing program for active pen writing exception implements the following steps:
when the active pen is powered on, acquiring a first pressure value of a pen point through a pressure sensor, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
when abnormal writing is detected, acquiring a second pressure value of the pen point and an acceleration value of the active pen at set intervals, and if the second pressure value is unchanged and the acceleration value meets set conditions, taking the second pressure value as a second zero reference value and writing based on the second zero reference value;
and when the abnormal writing is detected again, acquiring the pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
In one embodiment, the processing device for the active pen writing abnormity comprises an acquisition module, a first detection module and a second detection module;
the acquisition module is used for acquiring a first pressure value of a pen point through a pressure sensor when the active pen is powered on, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
the first detection module is used for acquiring a second pressure value of the pen point and an acceleration value of the active pen at set time intervals when abnormal writing is detected, and if the second pressure value is unchanged and the acceleration value meets set conditions, the second pressure value is used as a second zero reference value, and writing is performed based on the second zero reference value;
and the second detection module is used for acquiring the pressure value of the pen point when the writing abnormity is detected again, acquiring a third pressure value of the pen point if the pressure value is a negative value, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
Further, the first detection module comprises an acquisition unit, a judgment unit and an update unit;
the acquisition unit is used for acquiring a second pressure value of the pen point at set time intervals and acquiring a second pressure value which changes within the set time;
the acquiring unit is further configured to acquire acceleration values corresponding to three axes of the active pen respectively within the set time through a gravity sensor, where the three axes are an x axis, a y axis, and a z axis;
the judging unit is used for taking the second pressure value as a second return-to-zero reference value if the number of the second pressure values which change within the set time is smaller than the set number and the acceleration value is smaller than a set threshold value;
and the updating unit is used for updating the set threshold value according to the second zero reference value to obtain a first threshold value and writing based on the first threshold value.
Further, the acquisition module comprises an acquisition unit, a judgment unit and an updating unit;
the acquiring unit is used for acquiring an average value corresponding to the first pressure value and comparing the average value with the set threshold value;
the judging unit is configured to use the average value as the first return-to-zero reference value if the average value is smaller than or larger than the set threshold value;
and the updating unit is used for updating the set threshold value according to the first zeroing reference value to obtain a second threshold value and writing based on the second threshold value.
Further, the updating unit comprises an acquiring subunit and a judging subunit;
the obtaining subunit is configured to obtain a second pressure value of the pen tip and an acceleration value of the active pen after the set time;
the judging subunit is further configured to enter a sleep state if neither the second pressure value nor the acceleration value is changed.
Further, the second detection module comprises a judgment unit, an acquisition unit and an updating unit;
the judgment unit is used for determining that the pressure value is a negative value if the obtained pressure value is smaller than a return-to-zero reference value;
the acquisition unit is used for acquiring a third pressure value corresponding to the pen point without external force, and taking the third pressure value as a third zero reference value;
and the updating unit is used for updating the set threshold value according to the third zero-return reference value to obtain a third threshold value, and writing based on the third threshold value.
Further, the second detection module further comprises a detection unit and a refresh unit;
the detection unit is used for detecting the pressure value of the pen point through the pressure sensor at intervals of first set time under the condition that the active pen is under no pressure;
the refreshing unit is used for refreshing the detected pressure value.
Further, the obtaining unit is further configured to contact the pressure sensor with a set chip, so that the active pen is in a pre-pressed state.
The implementation of the functions of each module of the processing apparatus for active pen writing abnormality is similar to the process in the above method embodiment, and is not described in detail here.
In addition, the application also provides a terminal, the terminal comprises a memory, a processor and a processing program which is stored in the memory and runs on the processor for abnormal writing of the active pen, the terminal acquires a first pressure value of a pen point through a pressure sensor, and the first pressure value is used as a first return-to-zero reference value; when abnormal writing is detected, a second pressure value of the pen point and an acceleration value of the active pen are obtained at set time intervals, and if the second pressure value is not changed and the acceleration value meets set conditions, the second pressure value is used as a second return-to-zero reference value; when the abnormal writing is detected again, acquiring a pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, and taking the third pressure value as a third zero reference value; and writing based on the threshold value corresponding to the zero reference value. Through operations such as power-on calibration, pressure return to zero, negative value updating and the like, the problem that handwriting can appear on a screen when an active pen is not in contact with the screen is solved, and normal writing is guaranteed.
In addition, the present application also provides a computer readable storage medium, where a processing program of the active pen writing exception is stored on the computer readable storage medium, and when the processing program of the active pen writing exception is executed by a processor, the steps of the processing method of the active pen writing exception are implemented.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While alternative embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method for handling active pen writing exceptions, the method comprising:
when the active pen is powered on, acquiring a first pressure value of a pen point through a pressure sensor, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
when abnormal writing is detected, acquiring a second pressure value of the pen point and an acceleration value of the active pen at set intervals, and if the second pressure value is unchanged and the acceleration value meets set conditions, taking the second pressure value as a second zero reference value and writing based on the second zero reference value;
and when the abnormal writing is detected again, acquiring the pressure value of the pen point, if the pressure value is a negative value, acquiring a third pressure value of the pen point, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
2. The method for processing the abnormal writing of the active pen according to claim 1, wherein the step of acquiring a second pressure value of the pen tip and an acceleration value of the active pen at set time intervals, and if the second pressure value is unchanged and the acceleration value meets a set condition, taking the second pressure value as a second return-to-zero reference value, and writing based on the second return-to-zero reference value comprises:
acquiring a second pressure value of the pen point at set time intervals, and acquiring a second pressure value which changes within the set time;
acquiring acceleration values respectively corresponding to three axes of the active pen through a gravity sensor within the set time, wherein the three axes are an x axis, a y axis and a z axis respectively;
if the number of the second pressure values which change within the set time is smaller than the set number and the acceleration value is smaller than the set threshold value, taking the second pressure values as a second return-to-zero reference value;
and updating the set threshold value according to the second zeroing reference value to obtain a first threshold value, and writing based on the first threshold value.
3. The method of handling an active pen writing exception according to claim 2, wherein said step of writing based on said first force value as a first zero reference value comprises:
obtaining an average value corresponding to the first pressure value, and comparing the average value with the set threshold value;
if the average value is smaller than or larger than the set threshold value, taking the average value as the first return-to-zero reference value;
and updating the set threshold value according to the first zeroing reference value to obtain a second threshold value, and writing based on the second threshold value.
4. The method for handling active pen writing anomalies according to claim 2, wherein the step of updating the set threshold value according to the second return-to-zero reference value to obtain a first threshold value, and writing based on the first threshold value includes:
after the set time, acquiring a second pressure value of the pen point and an acceleration numerical value of the active pen;
and if the second pressure value and the acceleration value are not changed, entering a dormant state.
5. The method for handling the abnormal writing with the active pen according to claim 2, wherein if the pressure value is a negative value, a third pressure value of the pen tip is obtained, the third pressure value is used as a third zero reference value, and the step of writing based on the third zero reference value comprises:
if the obtained pressure value is smaller than a return-to-zero reference value, determining that the pressure value is a negative value;
acquiring a third pressure value corresponding to the pen point without external force, and taking the third pressure value as a third zero reference value;
and updating the set threshold value according to the third zero-return reference value to obtain a third threshold value, and writing based on the third threshold value.
6. The active pen writing abnormity processing method according to any one of claims 1 to 3, wherein after the step of obtaining the pressure value of the pen tip when the writing abnormity is detected again, if the pressure value is a negative value, obtaining a third pressure value of the pen tip, and writing based on the third zero reference value by taking the third pressure value as a third zero reference value, the method comprises the following steps:
detecting a pressure value of the pen point through the pressure sensor at intervals of a first set time under the condition that the active pen is in a non-pressure state;
refreshing the detected pressure value.
7. The method for processing the abnormal writing of the active pen according to any one of claims 1 to 3, wherein when the active pen is powered on, a first pressure value of a pen tip is obtained through a pressure sensor, and the first pressure value is used as a first zero reference value, and before the step of writing based on the first zero reference value, the method comprises the following steps:
and contacting the pressure sensor with a set chip to enable the active pen to be in a prepressing state.
8. An apparatus for handling an active pen writing exception, the apparatus comprising:
the acquisition module is used for acquiring a first pressure value of a pen point through a pressure sensor when the active pen is powered on, taking the first pressure value as a first return-to-zero reference value, and writing based on the first return-to-zero reference value;
the first detection module is used for acquiring a second pressure value of the pen point and an acceleration value of the active pen at set time intervals when abnormal writing is detected, and if the second pressure value is unchanged and the acceleration value meets set conditions, the second pressure value is used as a second zero reference value, and writing is performed based on the second zero reference value;
and the second detection module is used for acquiring the pressure value of the pen point when the writing abnormity is detected again, acquiring a third pressure value of the pen point if the pressure value is a negative value, taking the third pressure value as a third zero reference value, and writing based on the third zero reference value.
9. A terminal, characterized in that the terminal comprises a memory, a processor and a handler of an active pen writing exception stored on the memory and running on the processor, the processor implementing the steps of the method according to any one of claims 1 to 7 when executing the handler of the active pen writing exception.
10. A computer-readable storage medium, having stored thereon a handler of an active pen writing exception, which when executed by a processor implements the steps of the method of any of claims 1 to 7.
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