CN103941860B - The gesture recognition system and its method of wristband type portable terminal - Google Patents
The gesture recognition system and its method of wristband type portable terminal Download PDFInfo
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Abstract
The present invention discloses the gesture recognition system and its method of a kind of wristband type portable terminal, and the gesture recognition system may include：Multiple pressure sensors, are arranged on the precalculated position on wrist strap, pressure value when making gesture for detection user suffered by the wrist strap；Acceleration transducer, is arranged in the main body of the portable terminal, for detecting the coordinate value of the portable terminal；Angular-rate sensor, is arranged in the main body, for detecting the angle of rotation of the portable terminal；Control unit, it is arranged in the main body, according at least one of the acceleration transducer, the angular-rate sensor and the detected value of the multiple pressure sensor, the gesture that user makes is judged, and control the portable terminal to perform operate corresponding with gesture.
Description
Technical field
The present invention relates to a kind of wristband type portable terminal, more particularly to a kind of it be capable of identify that gesture that user makes and hold
The gesture recognition system and its method of the wristband type portable terminal of the corresponding operation of row.
Background technology
Recently, with the development of intellectualized operation system, the more functions of wristband type portable terminal are imparted.Therefore,
Most wristband type portable terminal is called except possessing, and is sent outside the basic function of short message, also with multimedia
Broadcasting, network browsing, the functions such as shooting and medical examination of taking pictures.
For the input mode of wristband type portable terminal, in addition to conventional physical button, touched by flexibility
The use of control display screen etc., can also directly input user instruction by display screen.
But, due to the finite volume of wristband type portable terminal, therefore either physical button or virtual key, chi
Very little to be impossible to be made thin big, the difficulty for using increases, very inconvenient.
In this regard, also there is the gesture control armlet of MYO wrist straps etc in the market, produced by the muscle for detecting user
Electrical activity simultaneously converts thereof into operational order, and electronic equipment is sent in the way of wireless network by software.
But, when current MYO wrist straps are only worn on upper arm, can just ensure Operational Figure Of Merit, and also need to people
Hand has substantially violent action, therefore also such MYO wrist straps cannot be applied into wristband type portable terminal.
The content of the invention
The present invention is to propose in view of the above problems, and a kind of the gesture that user makes is capable of identify that its object is to provide
And perform the gesture recognition system and its method of the wristband type portable terminal of corresponding operation
For the attainment of one's purpose, according to an aspect of the present invention, there is provided a kind of gesture identification system of wristband type portable terminal
System, including：Multiple pressure sensors, are arranged on the precalculated position on wrist strap, wrist when making gesture for detection user
Pressure value suffered by band；Acceleration transducer, is arranged in the main body of the portable terminal, described portable for detecting
The coordinate value of terminal；Angular-rate sensor, is arranged in the main body, for detecting the angle of rotation of the portable terminal；
Control unit, is arranged in the main body, according at least one of the acceleration transducer, the angular-rate sensor with
And the detected value of the multiple pressure sensor, judge the gesture that user makes, and control the portable terminal to perform and hand
Gesture is operated accordingly.
Preferably, the pressure value that described control unit will can be detected is converted to pressure difference phase using following mathematical expression
To amount,
PK=△NK/WK
Wherein, PKIt is the pressure difference relative quantity, △ NKIt is the pressure difference value of the predetermined time interval of k-th pressure sensor,
WKIt is the detection range of k-th pressure sensor, and K is the integer more than or equal to 1.
Preferably, the present invention can also include adaptive unit, be used to adjust the phase between the wrist strap and user's wrist
To position relationship.
Preferably, the adaptive unit can include：It is arranged on the air pump of the side of the main body；It is arranged at the wrist
The air bag for taking；Multiple pressure sensors in the precalculated position being arranged on the wrist strap.
Preferably, the present invention can also include memory cell, be used to store gesture mapping table, and the gesture mapping table includes seat
The operation of at least one of mark relative value, angle of rotation and the pressure difference relative quantity and user gesture and the portable terminal
Corresponding relation between instruction.
Preferably, the present invention can also include reminding unit, the gesture made for user and the portable terminal
Setting state give user various promptings.
Preferably, described control unit can also include similar degree judging unit, for judging detected pressure value
Or meet ratio shared by the pressure value or pressure difference relative quantity of a reference value of corresponding gesture in pressure difference relative quantity.
Preferably, described control unit can also include self-defined unit, to be set and operation according to the custom of user
Instruct corresponding gesture.
For the attainment of one's purpose, according to another aspect of the present invention, there is provided a kind of gesture identification of wristband type portable terminal
Method, comprises the following steps：In a, the pressure value at multiple positions of detection wrist strap and coordinate value, the angle of rotation of wrist strap terminal
More than one；The pressure value detected by b, basis and more than one in coordinate value, angle of rotation, judge that user makes
Gesture.
Preferably, step can also be included：The pressure value that will be detected is converted to pressure difference phase using following mathematical expression
To amount,
PK=△NK/WK
Wherein, PKIt is the pressure difference relative quantity, △ NKIt is the pressure difference value in the scheduled time of k-th pressure sensor, WK
It is the detection range of the k-th pressure sensor, and K is the integer more than or equal to 1.
Preferably, can also include for adjusting relative between wrist strap terminal and user's wrist before a steps
The self adaptation step of position.
Preferably, the self adaptation step can also comprise the following steps：The air bag on wrist strap is filled using air pump
Gas；The pressure value of the predetermined position on detection wrist strap；The pressure value that will be detected is compared with standard value；According to comparing knot
Really, when pressure value is different from standard value, the gas flow of air bag is adjusted by air pump, so that the pressure value and standard value phase
Together.
Preferably, it is described by air pump adjust air bag gas flow the step of in, when pressure value be more than standard value when, can lead to
Air pump extraction section gas from air bag is crossed, untill the pressure value on predetermined position is identical with standard value；When pressure value is small
When standard value, can be continued to airbag aeration by air pump, untill the pressure value on predetermined position is identical with standard value.
Preferably, step can also be included after the step of pressure value of the predetermined position on the detection wrist strap：Judge
With the presence or absence of abnormal pressure value in the detected pressure value；If in the presence of abnormal pressure value, reminding user's adjustment
The wearing position of terminal.
Preferably, in the b step, the gesture that user makes can be judged based on gesture mapping table, the gesture mapping table
Comprising at least one of coordinate relative value, angle of rotation and the pressure difference relative quantity and user gesture and the portable terminal
Operational order between corresponding relation.
Preferably, when the gesture that user makes is judged using the pressure value or pressure difference relative quantity, if the pressure for being detected
Meet in force value or pressure difference relative quantity the ratio shared by the pressure value or pressure difference relative quantity of a reference value of corresponding gesture reach it is predetermined
More than value, then may determine that as user is made that corresponding gesture.
The gesture recognition system and its method of the wristband type portable terminal provided according to the present invention, user can be controlled with one hand
The various operations of portable terminal processed, thus, it is possible to improve the handling of wristband type portable terminal.
Brief description of the drawings
Fig. 1 is the simplified diagram according to wristband type portable terminal of the invention.
Fig. 2 is the module map according to wristband type portable terminal of the invention.
Fig. 3 is the brief signal of the arrangement example of the pressure sensor for showing wristband type portable terminal of the invention
Figure.
Fig. 4 is the flow chart of the gesture identification method according to wristband type portable terminal of the invention.
Specific embodiment
Hereinafter, it is described in detail for the wristband type portable terminal of the preferred embodiments of the present invention referring to the drawings.
Fig. 1 is the simplified diagram according to wristband type portable terminal of the invention.Fig. 2 is according to wristband type of the invention
The module map of portable terminal.
As seen from the figure, from the point of view of in appearance, wristband type portable terminal of the invention（Hreinafter referred to as wrist strap end
End）Generally include main body 100 and the wrist strap 110 being connected with the main body 100 by connecting portion 112.
Main body 100 may include display unit 102, communication unit（It is not shown）And it is arranged on multiple entities in precalculated position
Button（It is not shown）.And, the precalculated position of main body 100 is also provided with camera and loudspeaker etc..
Preferably, the display unit 102 can use flexible display screen, to increase between wrist strap terminal and user's wrist
Compactness.The display unit 102 can show various user interfaces, for example, system time, short message, web page contents etc..User
User instruction can be input into by touch manner or using physical button, be carried out with to the content shown by display unit 102
Operation.
Communication unit（It is not shown）May include radio antenna, bluetooth module etc. such that it is able to receive and dispatch with external equipment
Signal.
In order to improve the efficiency of user input instruction, it is easy to operation, the gesture identification system of wrist strap terminal of the invention
System may include sensing unit and control unit 200.Wherein, sensing unit may include to be arranged on main body 100 and wrist strap 110
Multiple pressure sensors 120 on predetermined position, the acceleration transducer 130 being arranged on inside main body 100 and angular speed sensing
Device 140.Wherein, angular-rate sensor 140 can be gyroscope.
And, the multiple pressure sensor 120 is arranged on muscular movement fierceness the most when user makes various gestures
Position.For example, during each finger motion of user, wrist can be caused（That is, the part of wrist strap terminal is worn）On different positions
The muscle put produces motion.These positions are arranged on by by pressure sensor 120, can substantially be judged according to pressure value
It is which finger is made that action.
Fig. 3 is the brief signal of the arrangement example of the pressure sensor for showing wristband type portable terminal of the invention
Figure.
From the figure 3, it may be seen that multiple pressure sensors（M1、M2…、Mn）Each precalculated position on wrist strap 110 is arranged in, with
The pressure value suffered by the wrist strap 110 caused for the muscular movement for detecting user.
Specifically, when the finger or wrist of user carry out various activities, the muscle of wrist and small arm segment
Corresponding motion will occur, the muscular movement causes each pressure sensor on wrist strap 110 or the back side of main body 100（M1、M2…、
Mn）Pressure value change, and the pressure sensor on each position（M1、M2…、Mn）The pressure value for detecting is by difference.
That is, each pressure sensor（M1、M2…、Mn）The change of the pressure value for being detected is by corresponding to the flesh of the finger of user or wrist
Meat activity, i.e. gesture.
Assuming that each sets pressure sensor（M1、M2…、Mn）Detected pressure vector is respectively（N1、N2…、Nn）, when
When the finger or Wrist-sport of user, multiple pressure sensors（M1、M2…、Mn）In a part of pressure sensor detect
Pressure value will change.
Here, the pressure variety that any one pressure sensor Mn is detected is △ Nn=Nn2-Nn1。
The inspection of each pressure sensor when finger that can obtain user by experiment makes various actions as listed in table 1
Measured value.
【Table 1】（Unit N）
| Action | M1 | M2 | M3 | M4 | … | … | Mn-2 | Mn-1 | Mn |
| Forefinger is slided up and down | 0.3466 | 0.3512 | 0.002 | 0.003 | … | … | 0.2645 | 0.3599 | 0.2664 |
| Forefinger horizontally slips | 0.3222 | 0.3265 | 0.002 | 0.001 | … | … | 0.002 | 0.2532 | 0.2495 |
| Middle finger is slided up and down | 0.3644 | 0.4595 | 0.3587 | 0.002 | … | … | 0.004 | 0.2767 | 0.2866 |
| Thumb horizontally slips | 0.001 | 0.003 | 0.003 | 0.2322 | … | … | 0.003 | 0.002 | 0.002 |
| … | … | … | … | … | … | … | … | … | … |
By above-mentioned experiment, a gesture of user will cause the pressure value that multiple pressure sensors are detected to occur
Change.Correspondingly, the pressure value that each pressure sensor is detected, can be used to judge that user is made that any gesture.
Gesture it is possible to further user is made is mapped with the operational order of portable terminal, to reach behaviour
Control the purpose of portable terminal.For example, " thumb horizontally slips " in above-mentioned table 1 can correspond to the page turning behaviour of terminal picture
Make, " forefinger is slided up and down " can correspond to terminal picture slide up and down operation etc..
But, it is contemplated that the pressure value that some pressure sensors are detected is very small, and between different user and each
All there is measurement error in individual pressure sensor, therefore only rely on the specific pressure value of table 1 such as and be difficult to accurate judgement, therefore
Above-mentioned data can be redefined by pressure difference relative quantity.
Assuming that the pressure limit of pressure sensor Mn is Wn（N is the integer more than or equal to 1）, then pressure difference relative quantity can represent
It is following mathematical expression 1.
【Mathematical expression 1】
Pn=△Nn/Wn
Wherein, PnThe pressure difference relative quantity detected by n-th pressure sensor, and 0≤Pn≤ 1, △ NnIt is n-th pressure
Pressure difference value in the scheduled time of sensor.Wherein, n is the integer more than or equal to 1.
For the result calculated by above-mentioned mathematical expression 1,2 significant digits or latter can be taken by rounding-off method
Position, and by pressure difference relative quantity PnIt is arranged as shown in the table.
【Table 2】
| Action | P1 | P2 | P3 | P4 | P5 | P6 | … | … | Pn-2 | Pn-1 | Pn |
| The upper and lower small amplitude slip of forefinger | 0.2 | 0.1 | 0 | 0 | 0 | 0 | … | … | 0.2 | 0.3 | 0.2 |
| Forefinger is significantly slided up and down | 0.3 | 0.1 | 0 | 0 | 0 | 0 | … | … | 0.3 | 0.4 | 0.3 |
| Forefinger bends | 0.3 | 0.1 | 0 | 0 | 0 | 0 | … | … | 0.3 | 0.5 | 0.4 |
| Forefinger or so small amplitude slip | 0.1 | 0.1 | 0 | 0 | 0 | 0 | … | … | 0.1 | 0.1 | 0.1 |
| … | … | … | … | … | … | … | … | … | … | … | … |
Definition is re-started by 1 pair of pressure value for detecting of above-mentioned mathematical expression and is processed, even if between different user
There is deviation in detected pressure value, its pressure difference relative quantity can also tend to identical, and can produce accordingly can be used as the judgement base of gesture
Accurate tables of data.By this tables of data, the accuracy rate of gesture judgement can be improved.
In addition, in addition to above-mentioned mathematical expression 1, those skilled in the art can also be using other mathematical methods to pressure
Force value is processed, and the accuracy of gesture identification is improved accordingly.Meanwhile, the pressure difference relative quantity P of above-mentioned table 2nCan be used to determine to use
The action of family finger, and same principle is based on, can be by testing the action made for judging other positions such as user's wrist
Tables of data.
In addition, in addition to the above-mentioned pressure difference relative quantity by Mathematical treatment, the pressure corresponding to gesture can also be given
The number range of force value, as the benchmark for judging gesture, thus when the pressure value for having several pressure sensors is in certain
When within the reference range of one gesture, it can be determined that go out user and be made that corresponding gesture.
Additionally, the control unit 200 of embodiments of the invention can also include a similar degree judging unit 210, it is used for
The pressure value of a reference value for judging to meet corresponding gesture in detected pressure value or pressure difference relative quantity or pressure difference relative quantity institute
The ratio for accounting for.
Here, the main purpose for setting similar degree judging unit 210 is to improve gesture to judge accuracy.That is, although doing
Go out correct action, but the error due to the amplitude or pressure sensor that act in itself, partial pressure value or pressure can be caused
Difference relative quantity is not inconsistent with corresponding a reference value（Or depart from reference range）.Now, can be judged by similar degree judging unit 210
Go out the shared ratio in whole pressure values or pressure difference relative quantity of the pressure value or pressure difference relative quantity of a reference value for meeting corresponding gesture
Rate, when the ratio reaches predetermined value（For example, 90%）During the above, control unit 200 is it may determine that for user is made that accordingly
Gesture.
Meanwhile, in order to improve the accuracy of gesture judgement, control unit 200 can also be using other specification as judging gesture
Or the foundation of initiation gesture identification function.
That is, in order to further increase the accuracy of gestures detection, can also be by the coordinate value phase of main body 100 in the present embodiment
To amount as the parameter for judging user gesture.Used as one, acceleration transducer 130 is arranged on body interior, for detecting master
The current two dimension or D coordinates value of body 100.When user's initiation gesture identification function and when making gesture, the seat of main body 100
Scale value（Two dimension is three-dimensional）Can change, when wrist moves to different positions, have corresponding coordinate value and correspond to therewith.Example
Such as, when user makes each gesture, the main body 100 can spatially produce movement, cause coordinate value to change, because
Corresponding relation can be set up between this user gesture and coordinate value now.
In this way, the relative changing value of the coordinate value of main body 100 is can detect by acceleration transducer 130, and the change
Value can combine with the pressure value or pressure difference relative quantity and be used as to judge the parameter of user gesture.
And, in order to further increase the accuracy of gestures detection, can also be by the angle of rotation of main body 100 in the present embodiment
As the parameter for judging user gesture.Used as one, angular-rate sensor 140 is arranged on the inside of main body, for detecting main body
100 rotational angular velocity.That is, when the hand of user makes gesture, the position of main body 100 will change, and can correspondingly produce
Angular velocity omega, treatment is integrated by the rotational angular velocity, can obtain angle of rotation θ.Thus, the gesture and angle of rotation of user
Between can also set up corresponding relation.Therefore, angle of rotation θ can also be combined and is used as with the pressure value or pressure difference relative quantity
Judge the parameter of user gesture.
Preferably, the angular-rate sensor can be gyroscope.
In this way, pressure value, coordinate value, the benchmark of angle of rotation and corresponding gesture that control unit 200 will can be detected
Value compares, when pressure value, coordinate value, angle of rotation are consistent with a reference value of corresponding gesture, it can be determined that for user is made that phase
The gesture answered.
In addition, more than one in the pressure difference relative quantity and coordinate value difference, angle of rotation can be combined to start
The gesture of gesture identification function.I.e., it is possible to more than one in making the pressure difference relative quantity and coordinate value difference, angle of rotation reaches
To automatic gesture identification function during predetermined value, to be user-friendly to.
In addition, the startup of gesture identification function may also rely on the physical button that is arranged on around main body 100 and
Input of particular sound signal etc..
Thus, among the gesture judgement system according to the present embodiment, can be passed by multiple pressure sensors and acceleration
One or more part in sensor, angular-rate sensor judges the gesture that user makes.
That is, after hand gesture recognition mode startup, by using multiple pressure sensors, acceleration transducer, angular speed
Relative quantity in the sensor detection scheduled time, such as change value of pressure, coordinate value difference, angle of rotation, can be relative using these
Value and combinations thereof judges the gesture that user makes.
At this point it is possible to by the change value of pressure（Or pressure difference relative quantity）And in coordinate value difference, angle of rotation extremely
Few one is set up corresponding relation with predetermined gesture, and setting corresponds to the operational order of the wrist strap terminal of each gesture, thus
Gesture mapping table is made, wrist strap terminal is manipulated such that it is able to be based on gesture mapping table and is performed corresponding to the gesture that user makes
Operation.
The gesture mapping table is storable within the memory cell 300 inside main body 100.
In addition, the accuracy of detection in order to improve the multiple pressure sensor, acceleration transducer, angular-rate sensor,
The relative motion between wrist strap terminal and worn arm should as far as possible be reduced.Meanwhile, in order to reduce between different users
Measured deviation, it should made wrist strap terminal be among roughly the same operating environment before initiation gesture identification function.
Accordingly, gesture recognition system of the invention may be fitted with adaptive unit 400, be used to adjust wrist strap with
Relative position relationship between the wrist of user.For example, can adjust wrist strap terminal and user's arm by adaptive unit 400
Between elasticity.In addition, the relative motion between wrist strap terminal and arm can be reduced by the adaptive unit 400, improve
The accuracy of identification of gesture recognition system.Meanwhile, can farthest be reduced between different user by adaptive unit 400
The deviation of operating environment.
Used as a row, adaptive unit 400 may include to be arranged on the side of main body 100, be used to what is be inflated or be evacuated
Multiple pressures of air pump 410, the air bag 420 being arranged on the predetermined position of wrist strap 110 and the predetermined position for being arranged on wrist strap 110
Force snesor 430.
Preferably, the air pump 410 is arranged on the connecting portion 112.
The course of work of the adaptive unit 400 is as follows.
In substantially position of the adjustment main body 100 on arm and when starting adaptive unit 400, air pump 410 is to air bag 420
It is inflated so that air bag 420 expands.And, multiple pressure sensors 430 detect that currently detected pressure value sends to
Control unit 200.
Be compared for detected pressure value from multiple pressure sensors 430 and standard value by control unit 200, to judge
Whether whether the current location of wrist strap terminal is appropriate and is in optimum operation environment.
That is, when detected pressure value is more than standard value, the control extraction section from air bag 420 of air pump 410 of control unit 200
Gas, untill detected pressure value that multiple pressure sensors 430 are detected meets standard value, and works as detected pressure value and is less than
During standard value, control unit control air pump 410 continues to be inflated to air bag 420, until the pressure that multiple pressure sensors 430 are detected
Untill power detected value meets standard value.
Meanwhile, based on the corresponding relation being arranged between multiple pressure sensors 430 of different parts, control unit 200
May determine that whether user is worn to correct position by wrist strap terminal.For example, when the wrist strap terminal that user is worn deviates
During correct position, after being inflated by air bag 420, if the pressure value exception detected by individual pressure sensors 430（That is,
Comparison with standard value（In the pressure value that correct position is detected）It is substantially bigger than normal or less than normal）, then user is may be considered not by wrist
Tape terminal is worn to correct position.
Preferably, wrist strap terminal of the invention also include a reminding unit 600, the reminding unit 600 may include loudspeaker,
Vibrating motor, light emitting diode（LED）Deng being used to send various prompting messages to user.For example, when startup adaptive unit
After 400, if control unit 200 is judged as that wrist strap terminal is not worn to correct position by user, reminding unit 600 can
Alarm tone is sent with the control of control unit 200, to remind user to be adjusted.
In addition, when identifying or not identifying the gesture of user, it is also possible to send corresponding voice signal or
The light of respective color is sent to remind user.
Accordingly, wrist strap terminal can be made to be in identical operating environment among different users, such that it is able to improve hand
The accuracy of gesture identification.
Meanwhile, in order that user sets the operational order related to gesture identification according to the custom of itself, according to this hair
Bright wrist strap terminal may be equipped with self-defined unit 500.If for example, the forefinger of user（Wear the arm of wrist strap terminal）Up and down
Significantly slide and initially correspond to sliding up and down for wrist strap terminal interface, then user can be by self-defined unit 500 by the food of user
Refer to that left and right is significantly slided and be set to correspond to sliding up and down for wrist strap terminal interface.
Fig. 4 is the flow chart of the gesture identification method according to wristband type portable terminal of the invention.
First, in step S100, the pressure value and coordinate value, the angle of rotation of wrist strap terminal at multiple positions of wrist strap are detected
In more than one.
Preferably, pressure value, coordinate value and the angle of rotation for being detected are relative value.That is, opened in gesture identification function
After dynamic, wrist strap terminal sets the initial value of the pressure sensor 120, acceleration transducer 130, angular-rate sensor 140
It is set to 0, it is possible to detected with predetermined time interval.Preferably, the predetermined time interval can have been made corresponding to user
The time of whole gesture.The predetermined time interval can continue to use Default Value, it is also possible to by user's self-defining.For example, working as user
When the average time for completing a gesture is about 0.25 second, user can make pressure sensor 120, acceleration transducer 130, angle
Velocity sensor 140 often just carried out one-shot measurement by 0.25 second.Alternatively, it is also possible to make pressure sensor 120, acceleration sensing
Device 130, angular-rate sensor 140 are carried out continuously detection.
Then, into step S200, one in the detected pressure value and coordinate value, angle of rotation with
On, judge the gesture that user makes.At this point it is possible to the base of the pressure value that will be detected, coordinate value, angle of rotation and corresponding gesture
Quasi- value compares, when pressure value, coordinate value, angle of rotation are consistent with a reference value of corresponding gesture, it can be determined that for user is made that
Corresponding gesture.
And, step S200 can also comprise the following steps：The pressure value is converted into pressure difference using following mathematical expression
Relative quantity, to determine the action of finger,
PK=△NK/WK
Wherein, PKIt is pressure difference relative quantity, △ NKIt is the pressure difference value of the predetermined time interval of k-th pressure sensor, WKFor
The detection range of the k-th pressure sensor, K is more than or equal to 1.
And, in order to improve the accuracy of gesture identification, it is also an option that property ground is included for adjusting before step S100
The self adaptation step of the relative position between wrist strap terminal and user's wrist（S10）.
Specifically, self adaptation step（S10）May include following steps：Air bag on wrist strap is inflated（S12）；Inspection
The pressure value of the predetermined position surveyed on wrist strap（S14）；The pressure value that will be detected is compared with standard value（S16）；Based on step
The comparative result of rapid S16, if pressure value is different from standard value, the pressure of air bag is adjusted by air pump, so that pressure value and mark
Quasi- value is equal（S18）.That is, when pressure value is more than standard value, the extraction section gas from air bag, until the pressure on predetermined position
Untill force value meets standard value；And when pressure value is less than standard value, continue to airbag aeration, until the pressure on predetermined position
Untill value meets standard value.
Preferably, also comprise the following steps after the step S14：With the presence or absence of different in pressure value detected by judging
Often（Comparison with standard value is substantially bigger than normal or less than normal）Pressure value（S141）If in the presence of abnormal pressure value, reminding user's adjustment
The position of wrist strap terminal（S142）.
In addition, any gesture can be made to user according to gesture mapping table in step s 200 judging.It is described
Pressure value is included in gesture mapping table（Or pressure difference relative quantity）Between scope, coordinate value scope, rotation angular region and user gesture
Corresponding relation.
Preferably, in step S200, pressure value is being utilized（Or pressure difference relative quantity）When judging that user makes any gesture,
If the pressure value for being detected or meet in pressure difference relative quantity corresponding gesture a reference value pressure value or pressure difference relative quantity shared by
Ratio reaches predetermined value（For example, 90%）More than, then it is judged as that user is made that corresponding gesture.
When the gesture that user is made is identified by step S200, step S300 is entered into, perform to correspond to and known
The operation of the gesture of the user not gone out.
The invention is not restricted to above-described embodiment, without departing from the present invention, can carry out various modifications and
Modification.
Claims (12)
1. a kind of gesture recognition system of wristband type portable terminal, it is characterised in that including：
Multiple pressure sensors, are arranged on the precalculated position on wrist strap, the muscle when finger for detecting user makes gesture
The pressure value suffered by the wrist strap that motion causes；
Acceleration transducer, is arranged in the main body of the portable terminal, for detecting the coordinate of the portable terminal
Value；
Angular-rate sensor, is arranged in the main body, for detecting the angle of rotation of the portable terminal；
Control unit, is arranged in the main body, according at least in the acceleration transducer, the angular-rate sensor
The detected value of individual and the multiple pressure sensor, judges the gesture that the finger of user is made, and control the portable terminal
End execution is corresponding with gesture to be operated,
The pressure value that described control unit will be detected is converted to pressure difference relative quantity using following mathematical expression,
PK=△ NK/WK
Wherein, PKIt is the pressure difference relative quantity, △ NKIt is the pressure difference value of the predetermined time interval of k-th pressure sensor, WKFor
The detection range of k-th pressure sensor, and K is the integer more than or equal to 1,
Described control unit also includes similar degree judging unit, for judging to be accorded with detected pressure value or pressure difference relative quantity
Close the ratio shared by the pressure value or pressure difference relative quantity of a reference value of corresponding gesture.
2. gesture recognition system according to claim 1, it is characterised in that also including adaptive unit, be used to adjust institute
State the relative position relationship between wrist strap and user's wrist.
3. gesture recognition system according to claim 2, it is characterised in that the adaptive unit includes：
It is arranged on the air pump of the side of the main body；
It is arranged at the air bag on the wrist strap；
Multiple pressure sensors in the precalculated position being arranged on the wrist strap.
4. gesture recognition system according to claim 1, it is characterised in that also including memory cell, be used to store gesture
Mapping table, the gesture mapping table includes at least one of coordinate relative value, angle of rotation and the pressure difference relative quantity and user
Corresponding relation between the operational order of gesture and the portable terminal.
5. according to the gesture recognition system that any one of claims 1 to 3 is described, it is characterised in that also including reminding unit,
The gesture and the setting state of the portable terminal made for the finger of user give user various promptings.
6. gesture recognition system according to claim 1, it is characterised in that described control unit also includes self-defined list
Unit, to set gesture corresponding with operational order according to the custom of user.
7. a kind of gesture identification method of wristband type portable terminal, it is characterised in that comprise the following steps：
A, detection wrist strap the pressure value at multiple positions and coordinate value, the angle of rotation of wrist strap terminal in more than one；
The pressure value detected by b, basis and more than one in coordinate value, angle of rotation, judge that the finger of user does
The gesture for going out,
Also include step：The pressure value that will be detected is converted to pressure difference relative quantity using following mathematical expression,
PK=△ NK/WK
Wherein, PKIt is the pressure difference relative quantity, △ NKIt is the pressure difference value in the scheduled time of k-th pressure sensor, WKFor this
The detection range of k-th pressure sensor, and K is the integer more than or equal to 1,
When the gesture that the finger of user is made is judged using the pressure value or pressure difference relative quantity, if the pressure value for being detected or
Meet the ratio shared by the pressure value or pressure difference relative quantity of a reference value of corresponding gesture in pressure difference relative quantity to reach more than predetermined value,
Then it is judged as that the finger of user is made that corresponding gesture.
8. method according to claim 7, it is characterised in that also included for adjusting wrist strap end before a steps
The self adaptation step of the relative position between end and user's wrist.
9. method according to claim 8, it is characterised in that the self adaptation step also comprises the following steps：
The air bag on wrist strap is inflated using air pump；
The pressure value of the predetermined position on detection wrist strap；
The pressure value that will be detected is compared with standard value；
According to comparative result, when pressure value is different from standard value, the gas flow of air bag is adjusted by air pump, so that the pressure
Value is identical with standard value.
10. method according to claim 9, it is characterised in that it is described air bag is adjusted by air pump gas flow the step of
In,
When pressure value be more than standard value when, by air pump from air bag extraction section gas, until the pressure value on predetermined position
Untill identical with standard value；
When pressure value is less than standard value, continued to airbag aeration by air pump, until pressure value and standard on predetermined position
Untill value is identical.
11. methods according to claim 9, it is characterised in that the pressure value of the predetermined position on the detection wrist strap
Also include step after step：
Judge to whether there is abnormal pressure value in the detected pressure value；
If in the presence of abnormal pressure value, reminding user to adjust the wearing position of terminal.
12. methods according to claim 7, it is characterised in that in the b step, judge to use based on gesture mapping table
The gesture that the finger at family is made, the gesture mapping table includes at least one of coordinate relative value, angle of rotation and the pressure difference
Corresponding relation between the operational order of relative quantity and user gesture and the portable terminal.
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