CN102750051B - Position detection device and position detection method - Google Patents
Position detection device and position detection method Download PDFInfo
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- CN102750051B CN102750051B CN201210185093.0A CN201210185093A CN102750051B CN 102750051 B CN102750051 B CN 102750051B CN 201210185093 A CN201210185093 A CN 201210185093A CN 102750051 B CN102750051 B CN 102750051B
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Abstract
The invention provides a position detection device which is used for confirming a touch position on a component. The position detection device comprises a component and a processor, wherein the component is capable of supporting and propagating bending wave vibration and is provided with two or more vibration sensors; and each vibration sensor is respectively used for measuring a bending wave vibration signal on the component; and the processor is connected with each vibration sensor, the processor processes the bending wave vibration signal from each vibration sensor so as to calculate the coordinates of the touch position on the component.
Description
Technical field
The present invention relates to a kind of position detecting device and method for detecting position, particularly relate to and can produce bending wave vibration when touching parts, recycling vibration transducer measures the signal of bending wave vibration, the signal of bending wave vibration can transfer to a processor, and this processor can calculate touch location coordinate when touching these parts.
Background technology
The development trend light, thin, short, little along with electronic product and function is complicated, product can be very limited for the space of placing input media, and the use of contact panel can not take up space completely, except can having the function of keyboard, mouse simultaneously, and the mode of operation of the hommizations such as handwriting input can be provided, therefore become the optimal selection of man-machine interface.
Contact panel directly directly touches contact panel with finger or pointer, utilizes the touch location pick-up unit on contact panel to calculate touch location coordinate, reaches the instruction input of hommization.The touch location pick-up unit of contact panel, can be divided into resistance-type, condenser type, optical profile type three kinds of modes at present, but the detection mode of aforementioned touch location all has its shortcoming:
1) contact panel of resistance-type has the shortcoming of printing opacity rate variance, if with display screen for touching interface, then can reduce brightness and the contrast of display screen.
2) capacitive contact panel is subject to temperature, humidity or Grounding difference and changes, less stable.
3) resolution of the contact panel of optical profile type is determined by the number that infrared ray transmitter and receiver is right, and resolution can be restricted.
Because aforesaid touch location detection mode all has its shortcoming, therefore, the present invention will utilize vibration transducer to measure bending wave vibration mode, provides new touch location pick-up unit, improves the shortcoming of current detection mode.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of position detecting device and method for detecting position, to provide a kind of method and device of detection touch location newly.
For achieving the above object and other relevant objects, the invention provides a kind of position detecting device, this position detecting device is in order to confirm touch location coordinate when touching parts, and it comprises: parts, and these parts can support and propagate bending wave vibration; These parts are provided with the vibration transducer of more than two or two, and each vibration transducer measures the signal of the bending wave vibration on these parts respectively; One processor, this processor connects each vibration transducer, and this processor process is from the signal of the bending wave vibration of each vibration transducer, is touch location coordinates to calculate when touching these parts.
Preferably, this processor process is the angle that this bending wave vibration of calculating and vibration transducer are formed from the signal of the bending wave vibration of each vibration transducer, to calculate the touch location when touching these parts.
Preferably, after the angle that this processor process is formed from the amplitude of this bending wave vibration of measuring signal of the bending wave vibration of each vibration transducer and bending wave vibration and vibration transducer, the angle that the amplitude of the bending wave vibration preset with this processor and bending wave vibration and vibration transducer are formed is done identification and is confirmed, based on this Identification Data, from this processor presetting database, select the touch location coordinate when touching these parts.
Preferably, this position detecting device comprises: these parts are provided with the vibration transducer of more than three or three; This processor process from the signal of the bending wave vibration of each vibration transducer is:
A touch location supposed by this processor, and calculates this hypothesis touch location and any one vibration transducer is the first distance; The real distance of the touch location of this processor calculating unit and this arbitrary vibration transducer is second distance; The first distance that cumulative each vibration transducer produces deducts the absolute value after second distance, then asks minimum error just to calculate touch location coordinate the accumulated value after cumulative.
Preferably, this position detecting device comprises: a display, and this display is connected with this processor.
Preferably, this vibration transducer is a piezoelectric sensor.
Preferably, this display is located on these parts.
Preferably, this vibration transducer is a piezoelectric sensor.
As mentioned above, position detecting device of the present invention, has following beneficial effect: brightness and the contrast that 1) can not reduce display screen; 2) be not subject to temperature, not by humidity, do not change by Grounding difference; 3) not by the restriction of resolution.
Accompanying drawing explanation
Fig. 1 is shown as the perspective view of position detecting device of the present invention.
Fig. 2 is shown as the upward view of position detecting device of the present invention.
The utilization finger that Fig. 3 is shown as position detecting device of the present invention touches the schematic diagram that parts produce bending wave vibration.
The pointer that utilizes that Fig. 4 is shown as position detecting device of the present invention touches the schematic diagram of parts generation bending wave vibration.
Fig. 5 is shown as the schematic diagram of (X, Y) coordinate method of the calculating touch location of position detecting device of the present invention.
Fig. 6 is shown as the schematic diagram of a kind of method for optimizing of (X, Y) coordinate of the calculating touch location of position detecting device of the present invention.
Fig. 7 is shown as the schematic diagram of another method for optimizing of (X, Y) coordinate of the calculating touch location of position detecting device of the present invention.
Element numbers explanation
1 parts
11 Trackpads
2 vibration transducers
21 piezoelectric sensors
3 fingers
31 bending wave vibrations
4 pointer
41 bending wave vibrations
S first distance
The angle that A bending wave vibration and vibration transducer are formed
The angle that B bending wave vibration and vibration transducer are formed
The X-coordinate of X touch location
The Y-coordinate of Y touch location
50 position detecting devices
A1, B1, C1 vibration transducer
The distance (A1 is the center of circle) of Ra and A1 point
The distance (B1 is the center of circle) of Rb and B1 point
The distance (C1 is the center of circle) of Rc and C1 point
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 7.Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.
During present embodiment illustrates, singulative is recorded and is not the plural form that given row removes this assembly or step with the assembly of term "a" or "an" beginning or step, unless separately illustrated and got rid of.Meanwhile, during with reference to " embodiment " of the present invention, it should not be interpreted as getting rid of other specific embodiment containing contained feature yet.During with reference to " embodiment " of the present invention, the enforcement of this case not can be limited it and implement kenel by following case study on implementation.
Position detecting device as shown in Figures 1 to 7
In the present embodiment, the computing method of touch location (X, Y) can reference:
(I): disclosed in " Zigbee integrates the research of positioning system " of 2008 Knowledge Communities and System Development symposial by localizing objects (X, Y) computing method:
Such as, two point location methods utilize touch location (X, Y) to the distance of gauge point (vibration transducer), calculates the coordinate of touch location.As in Fig. 6, A1, B1 are two gauge points (vibration transducer), and touch location just can calculate after sending and touching signal with the A1 point distance that is the center of circle for Ra, and method makes round B1 according to this, and two round intersection location can obtain the coordinate at touch location place.But the situation of reality, all has error to a certain degree, two circles intersect and can not meet at a bit, and that can use minimum error method to calculate the coordinate of touch location, is described as follows:
In above formula:
(Xa, Ya), (Xb, Yb) are respectively the coordinate of A1, B1 point.
Ra, Rb are respectively the distance of touch location (X, Y) coordinate and A1, B1 point.
When the value of Error is least error, then calculate the coordinate of (X, Y).
And for example, three-point fox method utilizes touch location (X, Y) to the distance of gauge point (vibration transducer), calculates the coordinate of touch location.As in Fig. 7, A1, B1, C1 are three gauge points (vibration transducer), touch location just can calculate after sending and touching signal with the A1 point distance that is the center of circle for Ra, and method makes round B1 and circle C1 according to this, and three round intersection location can obtain the coordinate at touch location place.But the situation of reality, all has error to a certain degree, three circles intersect and can not meet at a bit, and that can use minimum error method to calculate the coordinate of touch location, is described as follows:
In above formula:
(Xa, Ya), (Xb, Yb), (Xc, Yc) are respectively the coordinate of A1, B1, C1 point.
Ra, Rb, Rc are respectively the distance of touch location (X, Y) coordinate and A1, B1, C1 point.
When the value of Error is least error, then calculate the coordinate of (X, Y).
(II), see Fig. 5, the account form of touch location (X, Y), is described as follows:
X=Y*Tan[B] (1)
X=(S-Y)*Tan[A] (2)
Solve an equation (1) and (2), can obtain:
By (I), when the signal of this processor process from the bending wave vibration of each vibration transducer A1, B1, C1:
Suppose a touch location, and calculate this hypothesis touch location and any one vibration transducer is the first distance S;
The real distance of the touch location of this processor calculating unit and this arbitrary vibration transducer is the Y-coordinate of second distance Y(touch location);
The first distance S that cumulative each vibration transducer produces deducts the absolute value after second distance Y, then asks least error just to calculate touch location coordinate (X, Y) accumulated value after cumulative.
By (II), this processor process is the angle that this bending wave vibration of calculating and vibration transducer are formed from the signal of the bending wave vibration of each vibration transducer, thus, calculates the touch location coordinate when touching these parts.
As shown in Figures 1 to 4, the invention provides a kind of position detecting device 50, this position detecting device 50 is in order to confirm touch location when touching parts 1, and this position detecting device 50 comprises:
One parts 1, these parts 1 can support and propagate bending wave vibration (31,41);
These parts 1 are provided with the vibration transducer 2 of at least two or more, and each vibration transducer 2 measures the signal of the bending wave vibration (31,41) on these parts 1 respectively;
One processor, this processor connects each vibration transducer 2, and this processor process is from the signal of the bending wave vibration (31,41) of each vibration transducer 2, thus, calculates the touch location coordinate when touching these parts 1.(this processor is not disclosed in each figure)
Such as, this processor process is angles (A, B) that this bending wave vibration of calculating (31,41) is formed with vibration transducer from the signal of the bending wave vibration of each vibration transducer 2, thus, calculates the touch location coordinate when touching these parts 1.(account form refers to Fig. 5)
And for example, this processor process from the signal of the bending wave vibration of each vibration transducer 2 be measure angle (A, B) that the amplitude of this bending wave vibration (31,41) and bending wave vibration and vibration transducer formed after, the angle (A, B) that the amplitude of bending wave vibration (31,41) preset with this processor and bending wave vibration and vibration transducer are formed is done identification and is confirmed, based on this Identification Data, from this processor presetting database, select the touch location coordinate when touching these parts 1.(calculating identification and processor built-in database are not all disclosed in each figure)
Preferably, in this example, this vibration transducer 2 is a piezoelectric sensor 21.
Preferably, in this example, this position detecting device 50 comprises: a display, and this display is connected with this processor.(this display is not disclosed in each figure)
Preferably, in this example, each vibration transducer 2 is that use one binder is bonded on these parts 1.
Preferably, in this example, each vibration transducer 2 is welded on these parts 1.
Preferably, in this example, this display is located on these parts 1.(this display is not disclosed in each figure)
Preferably, in this example, such as this processor process from the mode of the signal of the bending wave vibration of four vibration transducers A1, B1, C1 is:
Suppose a touch location, and calculate this hypothesis touch location and any one vibration transducer is the first distance S;
The real distance of the touch location of this processor calculating unit and this arbitrary vibration transducer is the Y-coordinate of second distance Y(touch location);
The first distance S that cumulative each vibration transducer produces deducts the absolute value after second distance Y, then asks least error just to calculate touch location coordinate the accumulated value after cumulative.
The present invention also provides a kind of scheme of method for detecting position.See Fig. 1 to Fig. 7.
In this example, the computing method of (I) touch location (X, Y) can reference:
Shown in " Zigbee integrates the research of positioning system " of 2008 Knowledge Communities and System Development symposial by localizing objects (X, Y) computing method:
Such as, two point location methods utilize touch location (X, Y) to the distance of gauge point (vibration transducer), calculates the coordinate of touch location.As shown in Figure 6, A1, B1 are two gauge points (vibration transducer), and touch location just can calculate after sending and touching signal with the A1 point distance that is the center of circle for Ra, and method makes round B1 according to this, and two round intersection location can obtain the coordinate at touch location place.But the situation of reality, all has error to a certain degree, two circles intersect and can not meet at a bit, and that can use minimum error method to calculate the coordinate of touch location, is described as follows:
In above formula:
(Xa, Ya), (Xb, Yb) are respectively the coordinate of A1, B1 point.
Ra, Rb are respectively the distance of touch location (X, Y) coordinate and A1, B1 point.
When the value of Error is least error, then calculate (X, Y) coordinate.
And for example, three-point fox method utilizes touch location (X, Y) to the distance of gauge point (vibration transducer), calculates touch location coordinate.As shown in Figure 7, A1, B1, C1 are three gauge points (vibration transducer), touch location just can calculate after sending and touching signal with the A1 point distance that is the center of circle for Ra, and method makes round B1 and circle C1 according to this, and three round intersection location can obtain the coordinate at touch location place.But the situation of reality, all has error to a certain degree, three circles intersect and can not meet at a bit, and that can use minimum error method to calculate touch location coordinate, is described as follows:
In above formula:
(Xa, Ya), (Xb, Yb), (Xc, Yc) are respectively the coordinate of A1, B1, C1 point.
Ra, Rb, Rc are respectively the distance of touch location (X, Y) coordinate and A1, B1, C1 point.
When the value of Error is least error, then calculate (X, Y) coordinate.
(II), as shown in Figure 5, the account form of touch location (X, Y), is described as follows:
X=Y*Tan[B] (1)
X=(S-Y)*Tan[A] (2)
Solve an equation (1) and (2), can obtain:
By (I), when the signal of this processor process from the bending wave vibration of each vibration transducer A1, B1, C1:
Suppose a touch location, and calculate this hypothesis touch location and any one vibration transducer is the first distance S;
The real distance of the touch location of this processor calculating unit and this arbitrary vibration transducer is the Y-coordinate of second distance Y(touch location);
The first distance S that cumulative each vibration transducer produces deducts the absolute value after second distance Y, then asks least error just to calculate touch location coordinate the accumulated value after cumulative;
By (II), this processor process is the angle that this bending wave vibration of calculating and vibration transducer are formed from the signal of the bending wave vibration of each vibration transducer, thus, calculates the touch location coordinate when touching these parts.
As from the foregoing, the invention provides a kind of method for detecting position, this method for detecting position is in order to confirm touch location when touching parts, and this method for detecting position comprises following implementation step:
Touch parts (these parts can be provided with a display);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal receives (this vibration transducer can be a piezoelectric sensor) by the vibration transducer of at least two or more;
One processor (this processor can be connected with a display), this processor connects each vibration transducer;
This processor process, from the signal of the bending wave vibration of each vibration transducer, thus, calculates the touch location when touching these parts, and this touch location is a touch location coordinate.
Preferably, the present invention also provides a kind of method for detecting position, and this method for detecting position is in order to confirm touch location when touching parts, and this method for detecting position comprises following implementation step:
Touch parts (these parts can be provided with a display);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal receives (this vibration transducer can be a piezoelectric sensor) by the vibration transducer of at least two or more;
One processor (this processor can be connected with a display), this processor connects each vibration transducer;
This processor process calculates from the signal of the bending wave vibration of each vibration transducer the angle that this bending wave vibration and vibration transducer formed, and thus, calculate the touch location when touching these parts, this touch location is a touch location coordinate.
Preferably, the present invention also provides a kind of method for detecting position, and this method for detecting position is in order to confirm touch location when touching parts, and this method for detecting position comprises following implementation step:
Touch parts (these parts can be provided with a display);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal receives (this vibration transducer can be a piezoelectric sensor) by the vibration transducer of at least two or more;
One processor (this processor can be connected with a display), this processor connects each vibration transducer;
This processor process from the signal of the bending wave vibration of each vibration transducer be measure angle that the amplitude of this bending wave vibration and bending wave vibration and vibration transducer formed after, the angle that the amplitude of the bending wave vibration preset with this processor and bending wave vibration and vibration transducer are formed is done identification and is confirmed, based on this Identification Data, from the database that this processor is preset, select the touch location when touching these parts, this touch location is a touch location coordinate.
More preferably, the present invention also provides a kind of method for detecting position, and this method for detecting position is in order to confirm touch location when touching parts, and this method for detecting position comprises following implementation step:
Touch parts (these parts can be provided with a display);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal receives (this vibration transducer can be a piezoelectric sensor) by the vibration transducer of at least three or more;
One processor (this processor can be connected with a display), this processor connects each vibration transducer, wherein: a touch location supposed by this processor, and calculates this hypothesis touch location and any one vibration transducer is the first distance S; The real distance of the touch location of this processor calculating unit and this arbitrary vibration transducer is the Y-coordinate of second distance Y(touch location); The first distance S that cumulative each vibration transducer produces deducts the absolute value after second distance Y, then asks least error just to calculate touch location coordinate the accumulated value after cumulative.
In sum, position detecting device of the present invention, has following beneficial effect: brightness and the contrast that 1) can not reduce display screen; 2) be not subject to temperature, not by humidity, do not change by Grounding difference; 3) not by the restriction of resolution.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (5)
1. a position detecting device, this position detecting device is in order to confirm touch location coordinate when touching parts, and it is characterized in that, this position detecting device comprises:
One parts, these parts can support and propagate bending wave vibration;
These parts are provided with the vibration transducer of more than two or two, and each vibration transducer measures the signal of the bending wave vibration on these parts respectively;
One processor, this processor connects each vibration transducer, and this processor process is from the signal of the bending wave vibration of each vibration transducer, is touch location coordinates to calculate when touching these parts;
This processor process from the method for the signal of the bending wave vibration of each vibration transducer is: after measuring the angle that the amplitude of this bending wave vibration and bending wave vibration and vibration transducer formed, the angle that the amplitude of the bending wave vibration preset with this processor and bending wave vibration and vibration transducer are formed is done identification and is confirmed, based on this Identification Data, from this processor presetting database, select the touch location coordinate when touching these parts.
2. position detecting device according to claim 1, is characterized in that, this position detecting device comprises: a display, and this display is connected with this processor.
3. position detecting device according to claim 2, is characterized in that, this vibration transducer is a piezoelectric sensor.
4. position detecting device according to claim 2, is characterized in that, this display is located on these parts.
5. position detecting device according to claim 4, is characterized in that, this vibration transducer is a piezoelectric sensor.
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| TWI479395B (en) * | 2014-01-09 | 2015-04-01 | Infilm Optoelectronic Inc | Light vieration touch apparatus |
| CN114310742B (en) * | 2021-12-21 | 2022-11-22 | 江苏隆丰电子有限公司 | Automobile wire harness assembling and clamping device |
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| CN1809800A (en) * | 2003-05-19 | 2006-07-26 | 3M创新有限公司 | Vibration sensing touch input device |
| CN100349106C (en) * | 2001-07-04 | 2007-11-14 | 新型转换器有限公司 | Contact sensitive device. |
| CN101095100A (en) * | 2004-12-29 | 2007-12-26 | 3M创新有限公司 | Touch location determination using vibration wave packet dispersion |
| CN101859211A (en) * | 2010-05-21 | 2010-10-13 | 汉王科技股份有限公司 | Finger touch positioner and method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100349106C (en) * | 2001-07-04 | 2007-11-14 | 新型转换器有限公司 | Contact sensitive device. |
| CN1809800A (en) * | 2003-05-19 | 2006-07-26 | 3M创新有限公司 | Vibration sensing touch input device |
| CN101095100A (en) * | 2004-12-29 | 2007-12-26 | 3M创新有限公司 | Touch location determination using vibration wave packet dispersion |
| CN101859211A (en) * | 2010-05-21 | 2010-10-13 | 汉王科技股份有限公司 | Finger touch positioner and method |
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