CN114077327A - Position detection method and system - Google Patents
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- CN114077327A CN114077327A CN202010826197.XA CN202010826197A CN114077327A CN 114077327 A CN114077327 A CN 114077327A CN 202010826197 A CN202010826197 A CN 202010826197A CN 114077327 A CN114077327 A CN 114077327A
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- 238000001514 detection method Methods 0.000 title claims abstract description 268
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000009471 action Effects 0.000 claims description 17
- 238000010924 continuous production Methods 0.000 claims description 2
- 210000001015 abdomen Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 210000001145 finger joint Anatomy 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 101150053299 Mark1 gene Proteins 0.000 description 1
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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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
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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
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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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
Abstract
A method and system for location detection, wherein the method comprises: detecting an elastic wave signal generated when a position detection device is touched through an elastic wave sensor arranged on the position detection device, and converting the elastic wave signal into an electric signal; detecting a touch state according to the electric signal to obtain a touch state detection result; and outputting and controlling the position track detected by the position detection device according to the touch state detection result.
Description
Technical Field
The present disclosure relates to, but not limited to, position detection technology, and more particularly, to a method and system for position detection.
Background
At present, large-size and super-large-size electronic whiteboards in the market generally adopt an infrared position detection device or a capacitance position detection device to output position tracks. The infrared position detection device or the capacitance position detection device easily makes misjudgment on the touched state of the electronic whiteboard, and then the precision of position detection is reduced.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the application provides a position detection method and a position detection system, which can improve the position detection precision.
The position detection method provided by the embodiment of the application comprises the following steps:
detecting an elastic wave signal generated when a position detection device is touched through an elastic wave sensor arranged on the position detection device, and converting the elastic wave signal into an electric signal;
detecting a touch state according to the electric signal to obtain a touch state detection result;
and outputting and controlling the position track detected by the position detection device according to the touch state detection result.
The position detection system provided by the embodiment of the application comprises:
an elastic wave sensor disposed on the position detection device, configured to detect an elastic wave signal generated when the position detection device is contacted, and convert the elastic wave signal into an electrical signal;
a control unit, connected to the elastic wave sensor, configured to perform the steps of the position detection method as described in the previous embodiments.
According to the embodiment of the application, the touch state detection is realized through the elastic wave sensor arranged on the position detection device, meanwhile, the position track is output and controlled according to the touch state detection result and the detection result of the position detection device, and the position detection precision can be improved relative to the position detection device which is used alone for carrying out position detection.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a flowchart of a position detection method according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a position track of a touch object with different characteristics after the touch object touches a touch display screen provided with a position detection device according to an embodiment of the present disclosure;
fig. 3 is a schematic view illustrating a touch object with different characteristics contacting an infrared position detection device according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating a correspondence relationship between a contact area and a trigger threshold of a position detection device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating position detection performed by the position detection apparatus at different scanning frequencies in different touch position ranges according to the embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating an embodiment of adding different marks to position tracks generated by touch objects with different characteristics;
fig. 7 is a block diagram of a position detection system according to an embodiment of the present disclosure.
Detailed Description
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
An embodiment of the present application provides a position detection method, as shown in fig. 1, the method includes:
step S101, detecting an elastic wave signal generated when a position detection device is touched through an elastic wave sensor arranged on the position detection device, and converting the elastic wave signal into an electric signal;
step S102, touch state detection is carried out according to the electric signal, and a touch state detection result is obtained;
step S103 performs output control on the position trajectory detected by the position detection device according to the touch state detection result.
The position detection device in the embodiment of the present application may be one or more of an infrared position detection device, a capacitive position detection device, and an optical position detection device.
According to the embodiment of the application, the touch state detection is realized through the elastic wave sensor arranged on the position detection device, meanwhile, the position track is output and controlled according to the touch state detection result and the detection result of the position detection device, and the position detection precision can be improved relative to the position detection device which is used alone for carrying out position detection.
In an exemplary embodiment, the detecting a touch state according to the electrical signal includes:
judging whether the position detection device is subjected to one or more of contact action, touch force and touch object characteristics according to the electric signal; the contact object characteristics can be finger abdomen characteristics, finger joint characteristics and object characteristics, different finger abdomens or finger joints of different people have different characteristics, and different finger abdomens and different finger joints of the same person can also have different characteristics. The object can be characterized by an eraser, a soft pen, a hard pen and the like;
and performing output control on the position track detected by the position detection device according to the touch state detection result, wherein the output control comprises the following steps: and carrying out output control on the position track according to one or more of whether the position detection device is in contact action, touch force and touch object characteristics.
According to the embodiment of the application, the position track can be output and controlled according to different touch state detection results, and the flexibility of output and control of the position track is improved.
In an exemplary embodiment, when the touch state detection result includes the touch object feature, the touch object feature is output and displayed when the position track is output and controlled, so that the user can know the touch object feature clearly.
In an exemplary embodiment, the output control of the position trajectory according to one or more of whether the position detection device is touched, the touch strength and the characteristics of a touch object includes:
outputting the position track detected by the position detection device when judging that the contact action is performed on the position detection device;
when the touch force of the position detection device is judged to be larger than a force threshold value, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the touch force, wherein if the touch force is larger, the color of the output position track is darker, or the line of the output position track is thicker, and the like;
when the characteristics of a touch object touching the position detection device are judged, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the characteristics of the touch object, for example, when the touch object is a finger abdomen, the output position track is a dotted line, when the touch object is a pen, the output position track is a solid line, and fig. 2 is a schematic diagram of the position tracks of the touch objects with different characteristics after being touched with a touch display screen provided with the position detection device;
when the position detection device is judged to be in contact action and the touch force is greater than the force threshold value, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the contact force;
when the contact action of the position detection device is judged and the characteristic of a touch object touching the position detection device is judged, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the characteristic of the touch object;
when the contact state detection result is that the touch force on the position detection device is judged to be greater than a force threshold value and the characteristic of a touch object touching the position detection device is judged, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the touch force and the characteristic of the touch object;
when the position detection device is judged to be in contact action and touch the touch object characteristic of the position detection device and the touch force is judged to be greater than the force threshold value, the position track detected by the position detection device is output, or the position track detected by the position detection device is output in a preset mode matched with the contact force and the touch object characteristic.
In an exemplary embodiment, the determining whether the contact action occurs to the position detection device includes: determining a touch position of the position detection device, determining a contact detection threshold matched with the touch position from a preset corresponding relation between a detection area of the position detection device and the contact detection threshold according to the touch position, comparing the electric signal with the matched contact detection threshold, and determining whether a contact action occurs; wherein different detection areas of the position detection device correspond to different contact detection thresholds.
In an exemplary embodiment, the detecting the touch state according to the electrical signal further includes determining a touch mode of the position detection device, where the touch mode includes a single touch and a continuous touch; the single touch refers to a touch in which the duration of the electrical signal generated by the touch is less than a preset first time threshold, the continuous touch refers to a touch in which the duration of the electrical signal generated by the touch is greater than a preset second time threshold, and the first time threshold and the second time threshold may be the same or the second time threshold is greater than the first time threshold;
the step of controlling the output of the position trajectory detected by the position detection device according to the touch state detection result further includes:
when the touch mode of the position detection device is judged, outputting the position track detected by the position detection device, or outputting the position track of the position detection device in a preset mode matched with the touch mode; or
Outputting the position track detected by the position detection device by combining at least one of touch modes, touch actions, touch force and touch object characteristics, or outputting the position track detected by the position detection device in a matching mode; the matching form is a form matched with a touch state detection result, and if the touch state detection result is that the touch mode and the touch force of the position detection device are judged to be greater than a force threshold value, the matching form is a preset form matched with the touch mode and the touch force; and if the touch state detection result is that the touch mode and the touch force of the position detection device are judged to be larger than the force threshold value and the touch object characteristic, the matching mode is a preset mode matched with the touch mode, the touch force and the touch object characteristic.
According to the embodiment of the application, the position track detected by the position detection device can be directly output according to the touch state detection result, or the position track detected by the position detection device can be output in a form matched with the touch state detection result, so that the flexibility of output control on the position track is further improved.
In an exemplary embodiment, the method further comprises:
and after the touch state detection is carried out according to the electric signal, determining the working state of the position detection device, and when the position detection device is in a non-working state, triggering the position detection device to carry out position detection. After the touch state detection is carried out, the position detection device in the non-working state is triggered to carry out position detection, the position detection device is not required to be in the working state all the time, and the energy consumption of the position detection device can be saved.
In an exemplary embodiment, when the touching object feature touching the position detection device is determined, the method further includes: adjusting a trigger threshold of the position track output by the position detection device according to the characteristics of the touch object;
outputting the position track detected by the position detection device, and further comprising: and judging whether the touch on the position detection device meets the trigger threshold value, and if so, outputting the position track detected by the position detection device.
In an exemplary embodiment, adjusting the trigger threshold of the position detection apparatus outputting the position trajectory according to the characteristics of the touch object includes:
and adjusting the trigger threshold value of the position detection device and the trigger threshold value interval to be larger when the contact object is contacted with the position detection device in a larger area determined according to the characteristics of the touch object.
Fig. 3 shows a schematic diagram of the contact between the touch objects with different characteristics and the infrared position detection device, in the diagram, the touch objects with different characteristics are the finger pulp of the human hand and the pen respectively, and after the finger pulp of the human hand and the pen are in contact with the infrared position detection device, because the contact surface areas are different, the light quantity blocked by the finger pulp of the human hand and the pen is different. According to the embodiment of the application, the trigger threshold of the position detection device is adjusted according to the contact area of the contact object and the position detection device, the larger the contact area of the contact object and the position detection device is, the larger the trigger threshold and the trigger threshold interval of the position detection device are, as shown in fig. 4, when the diameter of the contact area is in the range of d 0-d 1, the trigger threshold range of the position detection device is Va, and when the diameter of the contact area is in the range of d 2-d 3, the trigger threshold range of the position detection device is Vb. For example, the finger abdomen of a human hand is affected by the posture of the human hand touching the position detection device, the diameter of the contact area between the finger abdomen of the human hand and the position detection device is in the range of d 0-d 1, and at this time, the trigger threshold range of the position detection device corresponding to the finger abdomen of the human hand is Vb.
When the contact area of the contact object and the position detection device is large, the trigger threshold value of the position detection device is increased, and the probability that the position detection device is triggered by mistake can be reduced; when the contact area of the contact object and the position detection device is small, the trigger threshold value of the position detection device is lowered, and therefore the condition that the touch is not recognized can be prevented.
In an exemplary embodiment, before triggering the position detection device to perform position detection, the method further includes:
determining a touch position according to the electric signal;
triggering the position detection device to perform position detection, and outputting the received position track detected by the position detection device, including:
the position detection device is controlled to perform position detection at a first scanning frequency within a range of the touched position and at a second scanning frequency within a range outside the touched position, wherein the first scanning frequency is greater than the second scanning frequency, as shown in fig. 5.
According to the embodiment of the application, the touch position range is determined according to the electric signal obtained by the elastic wave sensor, and the probability that the position track of the touch object appears in the touch position range is high, so that the position detection is carried out at a high first scanning frequency in the range of the touch position, and the position detection is carried out at a low second scanning frequency in the range except the touch position, so that the energy consumption of the position detection device can be saved.
In an exemplary embodiment, the method further comprises:
after judging the characteristic of the touch object touching the position detection device, judging whether the characteristic of the touch object changes or not according to the electric signal in the continuous process of the touch state, if so, judging whether the touch state is terminated, and if not, re-determining the characteristic of the touch object according to the electric signal. If a newly added pen touches the position detection device in the continuous touch process of the abdomen of one hand with the position detection device, the characteristics of the touched object need to be determined again; if the hand leaves the position detecting device during continuous touch of the abdomen of one hand and one pen with the position detecting device, the touching object characteristics need to be determined again.
In an exemplary embodiment, the method further comprises:
after judging the characteristics of the touch objects touching the position detection device, adding marks to the position tracks of the characteristics of the touch objects, wherein different marks are added to the position tracks corresponding to different characteristics of the touch objects; as shown in fig. 6, Mark2 is added to the position trajectory where the pen touches the position detection device, and Mark1 is added to the position trajectory where the finger belly touches the position detection device;
and when judging that the characteristics of the touch object touching the position detection device are reduced, determining the position track stopping outputting according to the marks corresponding to the reduced characteristics of the touch object.
In an exemplary embodiment, determining whether the touch status is terminated includes:
judging whether the electric signal is lower than an electric signal threshold value, if the amplitude of the electric signal is lower than the amplitude threshold value, the intensity of the electric signal is lower than the intensity threshold value; alternatively, the first and second electrodes may be,
after the electric signal is judged to be lower than the electric signal threshold value, extracting the electric signal in a first time period before judgment, and judging whether the touch state is terminated according to the characteristics of the extracted electric signal; different touch object characteristics correspond to different electric signal thresholds; different touch modes correspond to first time periods of different lengths.
An embodiment of the present application further provides a position detection system, as shown in fig. 7, the system includes:
an elastic wave sensor 701 provided on the position detection device, configured to detect an elastic wave signal generated when the position detection device is contacted, and convert the elastic wave signal into an electrical signal;
a control unit 702, connected to the elastic wave sensor, configured to perform the steps of the position detection method according to any of the previous embodiments.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (13)
1. A position detection method, comprising:
detecting an elastic wave signal generated when a position detection device is touched through an elastic wave sensor arranged on the position detection device, and converting the elastic wave signal into an electric signal;
detecting a touch state according to the electric signal to obtain a touch state detection result;
and outputting and controlling the position track detected by the position detection device according to the touch state detection result.
2. The position detection method according to claim 1,
according to the electric signal, touch state detection is carried out, and the method comprises the following steps: judging whether the position detection device is subjected to one or more of contact action, touch force and touch object characteristics according to the electric signal;
and performing output control on the position track detected by the position detection device according to the touch state detection result, wherein the output control comprises the following steps: and carrying out output control on the position track according to one or more of whether the position detection device is in contact action, touch force and touch object characteristics.
3. The position detection method according to claim 2,
the output control of the position track according to one or more of whether the position detection device is in contact with the position detection device, the touch force and the characteristics of the touch object comprises the following steps:
outputting the position track detected by the position detection device when judging that the contact action is performed on the position detection device;
when the touch force of the position detection device is judged to be larger than a force threshold value, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the touch force;
when judging the characteristics of a touch object touching the position detection device, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the characteristics of the touch object;
when the position detection device is judged to be in contact action and the touch force is greater than the force threshold value, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the contact force;
when the contact action of the position detection device is judged and the characteristic of a touch object touching the position detection device is judged, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the characteristic of the touch object;
when the contact state detection result is that the touch force on the position detection device is judged to be greater than a force threshold value and the characteristic of a touch object touching the position detection device is judged, outputting the position track detected by the position detection device, or outputting the position track detected by the position detection device in a preset form matched with the touch force and the characteristic of the touch object;
when the position detection device is judged to be in contact action and touch the touch object characteristic of the position detection device and the touch force is judged to be greater than the force threshold value, the position track detected by the position detection device is output, or the position track detected by the position detection device is output in a preset mode matched with the contact force and the touch object characteristic.
4. The position detection method according to claim 3,
the step of detecting the touch state according to the electric signal further comprises the step of judging a touch mode of the position detection device, wherein the touch mode comprises single touch and continuous touch;
the step of controlling the output of the position trajectory detected by the position detection device according to the touch state detection result further includes:
when the touch mode of the position detection device is judged, outputting the position track detected by the position detection device, or outputting the position track of the position detection device in a preset mode matched with the touch mode; or
And outputting the position track detected by the position detection device by combining at least one of touch modes, touch actions, touch force and touch object characteristics, or outputting the position track detected by the position detection device in a matching mode.
5. The position detection method according to claim 3 or 4, characterized in that the method further comprises:
and after the touch state detection is carried out according to the electric signal, determining the working state of the position detection device, and when the position detection device is in a non-working state, triggering the position detection device to carry out position detection.
6. The position detection method according to claim 3 or 4,
when the feature of the touch object touching the position detection device is judged, the method further comprises the following steps: adjusting a trigger threshold of the position track output by the position detection device according to the characteristics of the touch object;
outputting the position track detected by the position detection device, and further comprising: and judging whether the touch on the position detection device meets the trigger threshold value, and if so, outputting the position track detected by the position detection device.
7. The method according to claim 6, wherein adjusting the trigger threshold of the position detection device to output the position trajectory according to the characteristics of the touched object comprises:
and adjusting the trigger threshold value of the position detection device and the trigger threshold value interval to be larger when the contact object is contacted with the position detection device in a larger area determined according to the characteristics of the touch object.
8. The position detection method according to claim 5, wherein before triggering the position detection device to perform position detection, the method further comprises:
determining a touch position according to the electric signal;
triggering the position detection device to perform position detection, and outputting the received position track detected by the position detection device, including:
and controlling the position detection device to perform position detection at a first scanning frequency within a range of the touch position, and performing position detection at a second scanning frequency within a range outside the touch position, wherein the first scanning frequency is greater than the second scanning frequency.
9. The position detection method according to claim 4, characterized in that the method further comprises:
after judging the characteristic of the touch object touching the position detection device, judging whether the characteristic of the touch object changes or not according to the electric signal in the continuous process of the touch state, if so, judging whether the touch state is terminated, and if not, re-determining the characteristic of the touch object according to the electric signal.
10. The position detection method according to claim 9, characterized in that the method further comprises:
after judging the characteristics of the touch objects touching the position detection device, adding marks to the position tracks of the characteristics of the touch objects, wherein different marks are added to the position tracks corresponding to different characteristics of the touch objects;
and when judging that the characteristics of the touch object touching the position detection device are reduced, determining the position track stopping outputting according to the marks corresponding to the reduced characteristics of the touch object.
11. The method of claim 9, wherein determining whether the touch state is terminated comprises:
judging whether the electric signal is lower than an electric signal threshold value; alternatively, the first and second electrodes may be,
after the electric signal is judged to be lower than the electric signal threshold value, extracting the electric signal in a first time period before judgment, and judging whether the touch state is terminated according to the characteristics of the extracted electric signal; different touch object characteristics correspond to different electric signal thresholds; different touch modes correspond to first time periods of different lengths.
12. The position detection method according to claim 2 or 3,
judging whether the position detection device is contacted or not, comprising the following steps: determining a touch position of the position detection device, determining a contact detection threshold matched with the touch position from a preset corresponding relation between a detection area of the position detection device and the contact detection threshold according to the touch position, comparing the electric signal with the matched contact detection threshold, and determining whether a contact action occurs; wherein different detection areas of the position detection device correspond to different contact detection thresholds.
13. A position detection system, comprising:
an elastic wave sensor disposed on the position detection device, configured to detect an elastic wave signal generated when the position detection device is contacted, and convert the elastic wave signal into an electrical signal;
a control unit connected to the elastic wave sensor and configured to perform the steps of the position detection method according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010826197.XA CN114077327A (en) | 2020-08-17 | 2020-08-17 | Position detection method and system |
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