CN102081472B - Signal sensor, sensing method and portable electronic equipment - Google Patents
Signal sensor, sensing method and portable electronic equipment Download PDFInfo
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- CN102081472B CN102081472B CN 200910224051 CN200910224051A CN102081472B CN 102081472 B CN102081472 B CN 102081472B CN 200910224051 CN200910224051 CN 200910224051 CN 200910224051 A CN200910224051 A CN 200910224051A CN 102081472 B CN102081472 B CN 102081472B
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Abstract
The invention discloses a signal sensor, comprising a user input end, a force conversion unit, a first piezoelectric and a signal outlet unit, wherein the user input end is used for a user to slide thereon; the force conversion unit is used for converting a thrust when a user slides on the user input end into a pressure acting on the first piezoelectric; the first piezoelectric is used for generating stressed deformation in response to the pressure acting thereon, and causing the surface thereof to be charged; and the signal output unit is used for outputting the charge on the surface of the first piezoelectric as a sensing signal. The invention further discloses a signal sensing method and portable electronic equipment. By applying the signal sensor, an electric sensing signal is generated directly, and the signal sensor can be directly used for controlling various specific applications of the equipment with no need of interference from other equipment processors, so the signal sensor is extremely suitable for various portable electronic equipment; furthermore, the signal sensor saves cost, avoids the defect of erroneous output owing to the random motion of the user without interaction purpose, and achieves wider applicable scope.
Description
Technical field
The present invention relates to field of sensing technologies, more specifically, relate to a kind of signal transducer, method for sensing and portable electric appts.
Background technology
In consumer electronics market, be exactly can be by the simple mutual control of user to one of product clear and strong demand.In order to realize this goal, developing increasing input equipment, these equipment are providing the control signal of difference in functionality, and one of them not perfect input equipment field is the swiping sensor.This kind sensor sensing is at equipment (such as mobile phone, MP3 player etc.) lip-deep scraping or slide, to carry out various concrete application (such as control loudspeaker volume etc.).For this application, touch-screen can use the principle of work of capacitive touch sensors to realize.
Existing swiping sensor technology for non-screen field mainly uses vibration and sound-detection method.By designing two kinds of different patterns in two definition directions, when user's finger is scraped sliding equipment surface, two kinds of different vibrations or sound can be detected by a microphone or accelerometer, these signals can be by the processor analysis of equipment then, determining the purposes of this signal, such as the signal of heightening volume or turn down the signal etc. of volume.
Yet present existing swiping sensor only provides the unlike signal that carries different content, also needs signal processing apparatus with operations such as analyzing and processing similar control volumes, and the transducing signal that can be used as electric control signal can not directly outwards be provided.
Summary of the invention
In view of this, embodiment of the present invention proposes a kind of signal transducer, need not the signal processing apparatus sense signal of just can directly offeing telex.
Embodiment of the present invention proposes a kind of sensing method, need not the signal processing apparatus sense signal of just can directly offeing telex.
Embodiment of the present invention also proposes a kind of portable electric appts, need not the signal processing apparatus sense signal of just can directly offeing telex.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of signal transducer comprises user input, power conversion unit, first piezoelectrics and signal lead-out unit, wherein:
Described user input is used for sliding thereon for the user;
Described power conversion unit, the thrust that is used for described user is slided at described user input is converted into the pressure that is applied to described first piezoelectrics;
Described first piezoelectrics are used for producing stress and deformation in response to the described pressure that is applied to first piezoelectrics, and cause the described first piezoelectrics surface charging lotus;
Described signal output unit is used for the electric charge on the described first piezoelectrics surface is exported as transducing signal.
Described first piezoelectrics are piezoelectric ceramics or piezoelectric crystal.
Described user input is button or touch-screen.
Described power conversion unit is the spring with stiff end; Wherein:
Described first piezoelectrics are positioned on the described spring, and described user input is positioned on described first piezoelectrics;
Described spring is subjected to the acting in conjunction of the pulling force of the thrust of sliding on the described user input and described stiff end, produces the pressure that acts on described first piezoelectrics.
This signal transducer further comprises framework, is used for holding described user input, power conversion unit, first piezoelectrics and signal lead-out unit.
The pre-polarised direction of described first piezoelectrics is vertical radial polarization.
This signal transducer further comprises second piezoelectrics that are connected with described power conversion unit, and the pre-polarised direction of described second piezoelectrics is opposite with the pre-polarised direction of described first piezoelectrics, is used for the maloperation of filter user on described user input and slides.
This signal transducer further comprises the gravity block that is positioned at the described first piezoelectrics surface, is used for applying the pressure relevant with acceleration to first piezoelectrics when described signal transducer has transient acceleration;
First piezoelectrics are further used for producing stress and deformation in response to the described pressure relevant with acceleration, and cause the described first piezoelectrics surface charging lotus;
Described signal output unit is used for the electric charge on the described first piezoelectrics surface is exported as the acceleration sensing signal.
A kind of portable electric appts, this portable electric appts comprises aforesaid signal transducer.
Described portable electric appts comprises notebook computer, mobile phone, MP3 player, MP4 player or digital camera.
A kind of sensing method, this method comprises:
The slip of induction user on user input;
The thrust that described user is slided at described user input is converted into the pressure that is applied to described first piezoelectrics;
First piezoelectrics produce stress and deformation in response to the described pressure that is applied to first piezoelectrics, and cause the described first piezoelectrics surface charging lotus;
The electric charge on the described first piezoelectrics surface is exported as transducing signal.
This method further comprises:
Utilize gravity block when described signal transducer has transient acceleration, to apply the pressure relevant with acceleration to first piezoelectrics;
First piezoelectrics produce stress and deformation in response to the described pressure relevant with acceleration, and cause the described first piezoelectrics surface charging lotus;
The electric charge on the described first piezoelectrics surface is exported as the acceleration sensing signal.
From technique scheme as can be seen, in technical scheme of the present invention, user input slides thereon for the user; The power conversion unit is converted into the pressure that is applied to first piezoelectrics with the thrust that the user slides; First piezoelectrics produce stress and deformation and cause the surface charging lotus; Signal output unit is used for the electric charge on the first piezoelectrics surface is exported as transducing signal.This shows, use after the present invention, can directly be produced fax sense signal by user's slip, the intervention that need not the miscellaneous equipment processor namely can directly utilize the various concrete application of this signal transducer opertaing device, be very suitable for various portable electric appts, and greatly saved cost.
In addition, because that piezoelectrics have a volume is little, no magnetic interference and advantage of low power consumption, the present invention is particularly useful for mobile phone or other portable electric appts.
And embodiment of the present invention is slided by the maloperation of filter user on user input, and the random motion of having avoided not having mutual intention owing to the user produces the deficiency of wrong output.Not only in this, embodiment of the present invention also provides the scraping of a kind of combination based on accelerometer/slide and knocked/the multi-functional input pickup of Oscilation sensor, range of application is more extensive.
Description of drawings
Fig. 1 is the structural representation according to signal transducer of the present invention.
Fig. 2 is the structural representation according to the signal transducer of embodiment of the present invention.
Fig. 3 is the slip synoptic diagram according to the signal transducer of embodiment of the present invention.
Fig. 4 is the structural representation of the signal transducer of another embodiment according to the present invention.
Fig. 5 is the structural representation of the signal transducer of an embodiment again according to the present invention.
Fig. 6 is the schematic flow sheet according to sensing method of the present invention.
Embodiment
Express clearlyer for the purpose, technical scheme and the advantage that make embodiment of the present invention, below in conjunction with drawings and the specific embodiments embodiment of the present invention is further described in more detail.
In embodiment of the present invention, by to using the design of piezoelectricity inductive material, can transform the scraping of machinery/slide and/or shake/knock that to wait action be electric signal.
Fig. 1 is the structural representation according to signal transducer of the present invention.
As shown in Figure 1, this signal transducer comprises user input 101, power conversion unit 102, first piezoelectrics 103 and signal lead-out unit 104, wherein:
Preferably, user input 101 can be button or touch-screen, slides thereon for the user.When user's finger or other position when user input 101 slides, on described user input 101, will produce the thrust about sliding.And the glide direction of user on user input 101 both can be horizontal direction, also can be vertical direction.The sliding path of user on user input 101 both can be straight line, also can be broken line or camber line etc., and embodiment of the present invention is to this and indefinite.The placement of user input 101 both can be level, also can be vertical, or tilt, no matter how user input 101 is placed, and the user can slide thereon, and produces the thrust about sliding.
In one embodiment, power conversion unit 102 can be for having the spring of stiff end, and first piezoelectrics 103 are positioned on the spring, and user input 101 is positioned on first piezoelectrics 103.When spring is subjected on the user input 101 acting in conjunction of pulling force of the thrust of sliding and stiff end, produce the pressure that acts on first piezoelectrics 103.
First piezoelectrics, the 103 stressed quantities of electric charge that produce are directly proportional with the size of suffered external force.The pressure that first piezoelectrics 103 are subjected to is more big, and the quantity of electric charge that produces at first piezoelectrics 103 is more many, and when acting on after external force on first piezoelectrics 103 removes, first piezoelectrics 103 can return to uncharged state again.Therefore, can set up first piezoelectrics 103 suffered pressure size and the linear relationship that produces the quantity of electric charge, by determining the size of the quantity of electric charge, the swiping dynamics size of user on user input accurately be responded to then.
In one embodiment, signal output unit 104 can be to be positioned at first piezoelectrics, 103 surface two electrodes up and down, is used for drawing the electric charge that is produced by first piezoelectrics 103.
In one embodiment, signal transducer may further include framework, is used for holding user input 101, power conversion unit 102, first piezoelectrics 103 and signal lead-out unit 104.Framework can also play protection and the effect that limits signal transducer.
In one embodiment, this signal can further comprise second piezoelectrics that are connected with power conversion unit 102 by sensor, the pre-polarised direction of second piezoelectrics is opposite with the pre-polarised direction of first piezoelectrics 103, is used for the maloperation of filter user on user input 101 and slides.
According to above-mentioned analysis, Fig. 2 is the structural representation according to the signal transducer of embodiment of the present invention.
As shown in Figure 2, this signal transducer comprises spring leaf 4, piezoelectric ceramic piece 5, electrode 3, button 1 and framework 2.Wherein button 1 is user input, and the piezoelectric ceramic piece 5 of button 1 below is the core induction installation of this signal transducer.Electrode 3 has two, and one is positioned at piezoelectric ceramic piece 5 tops, one be positioned at spring leaf 4 above, be used for to derive the electric charge that produces at piezoelectric ceramic piece 5.Framework 2 holds spring leaf 4, piezoelectric ceramic piece 5, electrode 3 and button 1, and plays protection and restriction effect.Spring leaf 4 has two stiff end S that are connected with framework respectively.
As shown in Figure 2, by the effect of spring leaf 4, can cleverly user's horizontal thrust partly be converted into vertical direction pressure.In Fig. 2, piezoelectric ceramic piece 5 pre-polarised directions are vertical radial polarization, and namely polarised direction is parallel with electrode 3 directions.
Based on example shown in Figure 2, Fig. 3 is the synoptic diagram according to the signal transducer slip of embodiment of the present invention.
As shown in Figure 3, at work, when user finger keytop by Fig. 2 in A point slide in the B point process, drive spring leaf 4 generation deformation, spring leaf 4 produces big pressure at right angle and acts on potsherd 5 surfaces owing to be subjected to the acting in conjunction of horizontal thrust and stiff end S place pulling force.Thereby piezoelectric ceramic piece 5 stress and deformations that are fixed in B point below produce electric signal.
This shows, make it to scrape sliding and the strength of pressing and speed (because speed is directly proportional with strength usually) have accurately and responds to the user in the ingenious characteristic of utilizing piezoelectric ceramics itself of the sensor of embodiment of the present invention, and be converted into effective linear electric signal.
Based on the present invention, the signal transducer of various concrete application can be proposed.Fig. 4 is the structural representation of the signal transducer of another embodiment according to the present invention.
As shown in Figure 4, this signal transducer comprises two piezoelectric ceramic pieces 5 and 6, electrode 3, button 1 and the framework 2 that spring leaf 4, polarised direction are opposite.Wherein button 1 is user input, and two piezoelectric ceramic pieces 5 of button 1 below and 6 are core induction installations of this signal transducer.Electrode 3 has three, and one is positioned at piezoelectric ceramic piece 5 tops, one be positioned at spring leaf 4 above, be used for to derive at piezoelectric ceramic piece 5 and 6 electric charges that produce a bottom that is positioned at piezoelectric ceramic piece 6.Framework 2 holds spring leaf 4, piezoelectric ceramic piece 5 and 6, electrode 3 and button 1, and plays protection and restriction effect.Spring leaf 4 has two stiff end S that are connected with framework respectively.
In Fig. 4, the two slice potsherd 5 and 6 opposite by polarised direction constitutes induction system jointly.When finger drives button and slides, up and down two potsherds 5 with 6 because polarised direction own produces the synchronous charge signal of different directions mutually on the contrary, thereby strengthened the error correcting capability of system, filter because user's static etc. are former thereby mistake that produce is imported.In more detail, when finger drove the button slip, two potsherds were because polarised direction own produces the opposite synchronous charge signal of phase place mutually on the contrary up and down.And because the electrostatic signal that the human body electric field induction goes out is synchronous on the surface of potsherd; Useful signal is the differential signal of two ceramic signals, can offset human body electric field induction electrostatic signal, improves the antijamming capability of system.This similar difference input of using always with Detection of Weak Signals and amplifying circuit.
Fig. 5 is the structural representation of the signal transducer of an embodiment again according to the present invention.
As shown in Figure 5, this signal transducer comprises spring leaf 5, piezoelectric ceramic piece 4, electrode 3, button 1 and framework 2.Wherein button 1 is user input, and the piezoelectric ceramic piece 5 of button 1 below is the core induction installation of this signal transducer.Electrode 3 has two, and one is positioned at piezoelectric ceramic piece 5 tops, one be positioned at spring leaf 4 above, be used for to derive the electric charge that produces at piezoelectric ceramic piece 5.Framework 2 holds spring leaf 4, piezoelectric ceramic piece 5, electrode 3 and button 1, and plays protection and restriction effect.Spring leaf 4 has two stiff end S that are connected with framework respectively.
In Fig. 5, at the additional derby 6 that two annulars are arranged in piezoelectric ceramic piece 4 surfaces.Mass in 6 acceleration transducers of derby.When being applied in, signal transducer knocks or when rocking, whole signal transducer can move, and derby 6 can be static relatively simultaneously, thereby can apply pressure to the surface at piezoelectric ceramic piece 4, make piezoelectric ceramic piece 4 produce electric charge, induce acceleration signal.The pressure that the electric charge that piezoelectric ceramic piece 4 produces is subjected to it has proportional relation, and that the pressure that piezoelectric ceramic piece 4 is subjected to and signal transducer are applied in the strength (being applied in the transient acceleration that knocks or rock with signal transducer) of knocking or rocking is relevant, therefore can induce signal transducer by the quantity of electric charge of determining piezoelectric ceramic piece 4 generations and be applied in the transient acceleration that knocks or rock, to be applied in the transient acceleration that knocks or rock relevant for electrode 3 quantity of electric charge of deriving and signal transducer thus, thereby can be applied in the transient acceleration that knocks or rock by the induced signal sensor.
Based on above-mentioned analysis, embodiment of the present invention has also proposed a kind of sensing method.
Fig. 6 is the schematic flow sheet according to sensing method of the present invention.
As shown in Figure 6, this method comprises:
Step 601: the slip of induction user on user input.
Step 602: the thrust that described user is slided at described user input is converted into the pressure that is applied to described first piezoelectrics.
Step 603: first piezoelectrics produce stress and deformation in response to the described pressure that is applied to first piezoelectrics, and cause the described first piezoelectrics surface charging lotus.
Step 604: the electric charge on the described first piezoelectrics surface is exported as transducing signal.
In above-mentioned flow process, preferred, this method further comprises: utilize gravity block to apply the pressure relevant with acceleration to first piezoelectrics when described signal transducer has transient acceleration;
First piezoelectrics produce stress and deformation in response to the described pressure relevant with acceleration, and cause the described first piezoelectrics surface charging lotus;
The electric charge on the described first piezoelectrics surface is exported as the acceleration sensing signal.
In sum, in technical scheme of the present invention, user input slides thereon for the user; The power conversion unit is converted into the pressure that is applied to first piezoelectrics with the thrust that the user slides; First piezoelectrics produce stress and deformation and cause the surface charging lotus; Signal output unit is used for the electric charge on the first piezoelectrics surface is exported as transducing signal.This shows, use after the present invention, can directly produce fax sense signal, thereby the intervention that need not the miscellaneous equipment processor namely can directly utilize the various concrete application of this signal transducer opertaing device, be very suitable for various portable electric appts, and saved cost greatly.
In addition, because that piezoelectrics have a volume is little, no magnetic interference and advantage of low power consumption, the present invention also is highly suitable for notebook computer, mobile phone, MP3 player, MP4 player or digital camera etc. arbitrarily in the electronic equipment.
And embodiment of the present invention is slided by the maloperation of filter user on user input, and the random motion of having avoided not having mutual intention owing to the user produces the deficiency of wrong output.Not only in this, embodiment of the present invention also provides the scraping of a kind of combination based on accelerometer/slide and knocked/the multi-functional input pickup of Oscilation sensor, range of application is more extensive.
The sensor of embodiment of the present invention structurally simple relatively, size is little, in light weight, and can directly provide electric control signal, be applicable to most of portable electric appts, such as notebook computer, mobile phone, MP3 player, MP4 player or digital camera etc.
Though more than specifically enumerate out some portable electric appts, it will be appreciated by those of skill in the art that only enumerating to exemplary herein to be not limited to the scope of application of embodiment of the present invention.
The above is the preferred embodiment of embodiment of the present invention only, is not for the protection domain that limits embodiment of the present invention.All within the spirit and principle of embodiment of the present invention, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of embodiment of the present invention.
Claims (9)
1. a signal transducer is characterized in that, comprises user input, power conversion unit, first piezoelectrics and signal lead-out unit, wherein:
Described user input is used for sliding thereon for the user;
Described power conversion unit, the thrust that is used for described user is slided at described user input is converted into the pressure that is applied to described first piezoelectrics;
Described first piezoelectrics are used for producing stress and deformation in response to the described pressure that is applied to first piezoelectrics, and cause the described first piezoelectrics surface charging lotus;
Described signal output unit is used for the electric charge on the described first piezoelectrics surface is exported as transducing signal;
This signal transducer further comprises second piezoelectrics that are connected with described power conversion unit, and the pre-polarised direction of described second piezoelectrics is opposite with the pre-polarised direction of described first piezoelectrics, is used for the maloperation of filter user on described user input and slides;
This signal transducer further comprises the gravity block that is positioned at the described first piezoelectrics surface, is used for applying the pressure relevant with acceleration to first piezoelectrics when described signal transducer has transient acceleration;
First piezoelectrics are further used for producing stress and deformation in response to the described pressure relevant with acceleration, and cause the described first piezoelectrics surface charging lotus;
Described signal output unit is used for the electric charge on the described first piezoelectrics surface is exported as the acceleration sensing signal.
2. signal transducer according to claim 1 is characterized in that, described first piezoelectrics are piezoelectric ceramics or piezoelectric crystal.
3. signal transducer according to claim 1 is characterized in that, described user input is button or touch-screen.
4. signal transducer according to claim 1 is characterized in that, described power conversion unit is the spring with stiff end; Wherein:
Described first piezoelectrics are positioned on the described spring, and described user input is positioned on described first piezoelectrics;
Described spring is subjected to the acting in conjunction of the pulling force of the thrust of sliding on the described user input and described stiff end, produces the pressure that acts on described first piezoelectrics.
5. signal transducer according to claim 1 is characterized in that, this signal transducer further comprises framework, is used for holding described user input, power conversion unit, first piezoelectrics and signal lead-out unit.
6. signal transducer according to claim 1 is characterized in that, the pre-polarised direction of described first piezoelectrics is vertical radial polarization.
7. a portable electric appts is characterized in that, this portable electric appts comprises signal transducer as claimed in claim 1.
8. portable electric appts according to claim 7 is characterized in that, described portable electric appts comprises notebook computer, mobile phone, MP3 player, MP4 player or digital camera.
9. a sensing method is characterized in that, this method comprises:
The slip of induction user on user input;
The thrust that described user is slided at described user input is converted into the pressure that is applied to first piezoelectrics;
First piezoelectrics produce stress and deformation in response to the described pressure that is applied to first piezoelectrics, and cause the described first piezoelectrics surface charging lotus;
The electric charge on the described first piezoelectrics surface is exported as transducing signal;
This method further comprises:
Utilize the maloperation of the pre-polarised direction second piezoelectrics filter user opposite with the pre-polarised direction of described first piezoelectrics on described user input to slide;
Utilize gravity block when described signal transducer has transient acceleration, to apply the pressure relevant with acceleration to first piezoelectrics;
First piezoelectrics produce stress and deformation in response to the described pressure relevant with acceleration, and cause the described first piezoelectrics surface charging lotus;
The electric charge on the described first piezoelectrics surface is exported as the acceleration sensing signal.
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| CN106406571B (en) * | 2016-08-31 | 2019-06-11 | 广州视源电子科技股份有限公司 | Interactive identification method, interactive identification equipment and intelligent wearable device |
| CN106775051A (en) * | 2016-11-15 | 2017-05-31 | 深圳天珑无线科技有限公司 | A kind of pressure sensitivity contact panel and pressure sensitivity contactor control device |
| CN106959772B (en) * | 2017-03-28 | 2021-05-18 | 联想(北京)有限公司 | Input method and electronic equipment |
| CN109186821A (en) * | 2018-07-25 | 2019-01-11 | 孝感锐创机械科技有限公司 | A kind of contactless micro-vibration and device for pressure measurement |
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| CN1845043A (en) * | 2006-04-29 | 2006-10-11 | 怡利电子工业股份有限公司 | Touch pad with press pressure detection |
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