CN102750051A - Position detection device and position detection method - Google Patents
Position detection device and position detection method Download PDFInfo
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- CN102750051A CN102750051A CN2012101850930A CN201210185093A CN102750051A CN 102750051 A CN102750051 A CN 102750051A CN 2012101850930 A CN2012101850930 A CN 2012101850930A CN 201210185093 A CN201210185093 A CN 201210185093A CN 102750051 A CN102750051 A CN 102750051A
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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 when touching parts and can produce bending wave vibration; Utilize vibration transducer to measure the signal of bending wave vibration again; The signal of bending wave vibration can transfer to a processor, and this processor can calculate the touch location coordinate when touching these parts.
Background technology
Light, thin, short, the little and function complicated development trends along with electronic product; It is very limited that product can supply to place the space of input media; And the use of contact panel can not take up space fully; Except that can having simultaneously keyboard, the mouse function, and the mode of operation of 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 the contact panel to calculate the 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, three kinds of modes of optical profile type at present, yet 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 the brightness and the contrast of display screen.
2) capacitive contact panel is subject to temperature, humidity or ground connection situation difference and changes less stable.
3) resolution of the contact panel of optical profile type receives right number decision by infrared, 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 the bending wave vibration mode, and new touch location pick-up unit is provided, and improves the shortcoming of present detection mode.
Summary of the invention
The shortcoming of prior art the object of the present invention is to provide a kind of position detecting device and method for detecting position in view of the above, so that a kind of method and device of new detection touch location are provided.
For realizing above-mentioned purpose and other relevant purposes, the present invention provides a kind of position detecting device, the touch location coordinate when this position detecting device touches parts in order to affirmation, and it comprises: parts, these parts can support and propagate bending wave vibration; These parts are provided with the vibration transducer 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 processes is touch location coordinates from the signal of the bending wave vibration of each vibration transducer to calculate when touching these parts.
Preferably, this processor processes is the angle that calculates this bending wave vibration and vibration transducer formation from the signal of the bending wave vibration of each vibration transducer, to calculate the touch location when touching these parts.
Preferably; Behind the angle that this processor processes forms 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; Do the identification affirmation with the amplitude and the bending wave vibration of the preset bending wave vibration of this processor with the angle that vibration transducer forms; 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 more than three or three; This processor processes from the signal of the bending wave vibration of each vibration transducer is:
This processor is supposed a touch location, and calculates this hypothesis touch location and any vibration transducer is first distance; The touch location of this processor calculating unit is a second distance with the real distance of this arbitrary vibration transducer; First distance that each vibration transducer produces of adding up deducts the absolute value behind the second distance, asks the accumulated value after adding up minimum error just to calculate the touch location coordinate again.
Preferably, this position detecting device comprises: a display, 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 stated, position detecting device of the present invention has following beneficial effect: 1) can not reduce the brightness and the contrast of display screen; 2) do not receive temperature, do not receive humidity, do not receive the ground connection situation different and change; 3) do not receive the restriction of resolution.
Description of drawings
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 synoptic diagram that parts produce bending wave vibration.
Fig. 4 is shown as the pointer of utilizing of position detecting device of the present invention and touches the synoptic diagram that parts produce bending wave vibration.
Fig. 5 is shown as (X, Y) synoptic diagram of coordinate method of the calculating touch location of position detecting device of the present invention.
Fig. 6 is shown as (X, Y) synoptic diagram of a kind of method for optimizing of coordinate of the calculating touch location of position detecting device of the present invention.
Fig. 7 is shown as (X, Y) synoptic diagram of another method for optimizing of coordinate of the calculating touch location of position detecting device of the present invention.
The 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 form
The angle that B bending wave vibration and vibration transducer form
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 that Ra and A1 are ordered (A1 is the center of circle)
The distance that Rb and B1 are ordered (B1 is the center of circle)
The distance that Rc and C1 are ordered (C1 is the center of circle)
Embodiment
Below by particular specific embodiment embodiment of the present invention is described, be familiar with this technological personage and can understand other advantages of the present invention and effect easily by the content that this instructions disclosed.
See also Fig. 1 to Fig. 7.Notice; The appended graphic structure that illustrates of this instructions, ratio, size etc.; All only in order to cooperate the content that instructions disclosed, understanding and reading for being familiar with this technological personage, is not in order to limit the enforceable qualifications of the present invention; Event is the technical essential meaning of tool not; The adjustment of the modification of any structure, the change of proportionate relationship or size not influencing under effect that the present invention can produce and the purpose that can reach, all should still drop on disclosed technology contents and get in the scope that can contain.
In this embodiment explanation, only if singulative record and be not the plural form that given row is removed this assembly or step with the assembly or the step of term " " or " one " beginning is explanation and getting rid of in addition.Simultaneously, during with reference to " embodiment " of the present invention, it should not be interpreted as other specific embodiment of eliminating and contain contained characteristic yet.During with reference to " embodiment " of the present invention, the enforcement of this case is not can be limited it by following case study on implementation to implement kenel.
Like Fig. 1 to position detecting device shown in Figure 7
In the present embodiment, touch location (X, computing method Y) can reference:
(I): " Zigbee integrates the research of positioning system " disclosed target that is positioned of 2008 Knowledge Communities and system development symposial (X, Y) computing method:
For example, two point location methods are to utilize touch location (X Y) to the distance of gauge point (vibration transducer), calculates the coordinate of touch location.In Fig. 6, A1, B1 are two gauge points (vibration transducer), just touch location is seen off and touched that can to calculate behind the signal with the A1 point be that the distance in the center of circle is Ra, method is made round B1 according to this, and two round intersection location can get the coordinate at touch location place.But actual situation all has error to a certain degree, not two crossing can not meeting on any of circles, and that can use minimum error method to calculate the coordinate of touch location, explains as follows:
In the following formula:
(Xa, Ya), (Xb Yb) is respectively the coordinate that A1, B1 are ordered.
Ra, Rb are respectively touch location (X, Y) coordinate and A1, the B1 distance of ordering.
When the value of Error is least error, then calculate (X, coordinate Y).
And for example, three-point fox method is to utilize touch location (X Y) to the distance of gauge point (vibration transducer), calculates the coordinate of touch location.In Fig. 7; A1, B1, C1 are three gauge points (vibration transducer); Touch location is seen off and is touched that just can to calculate behind the signal with the A1 point be that the distance in the center of circle is Ra, and method is made round B1 and circle C1 according to this, and three round intersection location can get the coordinate that touch location belongs to.But actual situation all has error to a certain degree, not three crossing can not meeting on any of circles, and that can use minimum error method to calculate the coordinate of touch location, explains as follows:
In the following formula:
(Xa, Ya), (Xb, Yb), (Xc Yc) is respectively the coordinate that A1, B1, C1 are ordered.
Ra, Rb, Rc are respectively touch location (X, Y) coordinate and A1, B1, the C1 distance of ordering.
When the value of Error is least error, then calculate (X, coordinate Y).
(II), referring to Fig. 5, touch location (X, account form Y) are explained as follows:
X=Y*Tan[B] (1)
X=(S-Y)*Tan[A] (2)
Solve an equation (1) and (2), can get:
By (I), when this processor processes during from the signal of the bending wave vibration of each vibration transducer A1, B1, C1:
Suppose a touch location, and to calculate this hypothesis touch location and any vibration transducer be first apart from S;
The touch location of this processor calculating unit is second distance Y (the Y coordinate of touch location) with the real distance of this arbitrary vibration transducer;
That adds up that each vibration transducer produces first deducts the absolute value behind the second distance Y apart from S, again the accumulated value after adding up ask least error just calculate the touch location coordinate (X, Y).
By (II), this processor processes is the angle that calculates this bending wave vibration and vibration transducer formation from the signal of the bending wave vibration of each vibration transducer, thus, calculates the touch location coordinate when touching these parts.
To shown in Figure 4, the present invention provides a kind of position detecting device 50 like Fig. 1, the touch location when this position detecting device 50 touches parts 1 in order to affirmation, 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 at least two or above vibration transducer 2, 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 processes thus, calculates the touch location coordinate when touching these parts 1 from the signal of the bending wave vibration (31,41) of each vibration transducer 2.(this processor is not disclosed among each figure)
For example, this processor processes is to calculate this bending wave vibration (31,41) and the angle (A, B) that vibration transducer forms 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 sees also Fig. 5)
And for example; This processor processes are amplitude and bending wave vibrations of measuring this bending wave vibration (31,41) from the signal of the bending wave vibration of each vibration transducer 2 with the angle (A, B) of vibration transducer formation after; Do the identification affirmation with the amplitude and the bending wave vibration of the preset bending wave vibration (31,41) of this processor with the angle (A, B) that vibration transducer forms; Based on this Identification Data, from this processor presetting database, select the touch location coordinate when touching these parts 1.(calculating identification and processor bist data storehouse all is not disclosed among 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, this display is connected with this processor.(this display is not disclosed among each figure)
Preferably, in this example, each vibration transducer 2 is to use a binder to be bonded on these parts 1.
Preferably, in this example, each vibration transducer 2 is to be welded on these parts 1.
Preferably, in this example, this display is located on these parts 1.(this display is not disclosed among each figure)
Preferably, in this example, for example this processor processes from the mode of the signal of the bending wave vibration of four vibration transducer A1, B1, C1 is:
Suppose a touch location, and to calculate this hypothesis touch location and any vibration transducer be first apart from S;
The touch location of this processor calculating unit is second distance Y (the Y coordinate of touch location) with the real distance of this arbitrary vibration transducer;
That adds up that each vibration transducer produces first deducts the absolute value behind the second distance Y apart from S, asks the accumulated value after adding up least error just to calculate the touch location coordinate again.
The present invention also provides a kind of scheme of method for detecting position.Referring to Fig. 1 to Fig. 7.
In this example, (I) touch location (X, computing method Y) can reference:
The target that is positioned shown in " Zigbee integrates the research of positioning system " of 2008 Knowledge Communities and system development symposial (X, Y) computing method:
For example, two point location methods are to 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 is seen off and touched that just can to calculate behind the signal with the A1 point be that the distance in the center of circle is Ra, and method is made round B1 according to this, and two round intersection location can get the coordinate at touch location place.But actual situation all has error to a certain degree, not two crossing can not meeting on any of circles, and that can use minimum error method to calculate the coordinate of touch location, explains as follows:
In the following formula:
(Xa, Ya), (Xb Yb) is respectively the coordinate that A1, B1 are ordered.
Ra, Rb are respectively touch location (X, Y) coordinate and A1, the B1 distance of ordering.
When the value of Error is least error, then calculate (X, Y) coordinate.
And for example, three-point fox method is to utilize touch location (X Y) to the distance of gauge point (vibration transducer), calculates the touch location coordinate.As shown in Figure 7; A1, B1, C1 are three gauge points (vibration transducer); Touch location is seen off and is touched that just can to calculate behind the signal with the A1 point be that the distance in the center of circle is Ra, and method is made round B1 and circle C1 according to this, and three round intersection location can get the coordinate that touch location belongs to.But actual situation all has error to a certain degree, not three crossing can not meeting on any of circles, and that can use minimum error method to calculate the touch location coordinate, explains as follows:
In the following formula:
(Xa, Ya), (Xb, Yb), (Xc Yc) is respectively the coordinate that A1, B1, C1 are ordered.
Ra, Rb, Rc are respectively touch location (X, Y) coordinate and A1, B1, the C1 distance of ordering.
When the value of Error is least error, then calculate (X, Y) coordinate.
(II), as shown in Figure 5, touch location (X, account form Y) are explained as follows:
X=Y*Tan[B] (1)
X=(S-Y)*Tan[A] (2)
Solve an equation (1) and (2), can get:
By (I), when this processor processes during from the signal of the bending wave vibration of each vibration transducer A1, B1, C1:
Suppose a touch location, and to calculate this hypothesis touch location and any vibration transducer be first apart from S;
The touch location of this processor calculating unit is second distance Y (the Y coordinate of touch location) with the real distance of this arbitrary vibration transducer;
That adds up that each vibration transducer produces first deducts the absolute value behind the second distance Y apart from S, asks the accumulated value after adding up least error just to calculate the touch location coordinate again;
By (II), this processor processes is the angle that calculates this bending wave vibration and vibration transducer formation from the signal of the bending wave vibration of each vibration transducer, thus, calculates the touch location coordinate when touching these parts.
By on can know that the present invention provides a kind of method for detecting position, the touch location of this method for detecting position when confirming to touch parts, this method for detecting position comprises following implementation step:
Touch parts (can be provided with a display on these parts);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal is by at least two or above vibration transducer reception (this vibration transducer can be a piezoelectric sensor);
One processor (this processor can be connected with a display), this processor connects each vibration transducer;
This processor processes thus, calculates the touch location when touching these parts from the signal of the bending wave vibration of each vibration transducer, and this touch location is a touch location coordinate.
Preferably, the present invention also provides a kind of method for detecting position, the touch location when this method for detecting position touches parts in order to affirmation, and this method for detecting position comprises following implementation step:
Touch parts (can be provided with a display on these parts);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal is by at least two or above vibration transducer reception (this vibration transducer can be a piezoelectric sensor);
One processor (this processor can be connected with a display), this processor connects each vibration transducer;
This processor processes thus, calculates the touch location when touching these parts from this bending wave vibration of calculated signals of the bending wave vibration of each vibration transducer and the angle of vibration transducer formation, and this touch location is a touch location coordinate.
Preferably, the present invention also provides a kind of method for detecting position, the touch location when this method for detecting position touches parts in order to affirmation, and this method for detecting position comprises following implementation step:
Touch parts (can be provided with a display on these parts);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal is by at least two or above vibration transducer reception (this vibration transducer can be a piezoelectric sensor);
One processor (this processor can be connected with a display), this processor connects each vibration transducer;
This processor processes be the amplitude and the bending wave vibration that measure this bending wave vibration from the signal of the bending wave vibration of each vibration transducer with the angle of vibration transducer formation after; Do the identification affirmation with the amplitude and the bending wave vibration of the preset bending wave vibration of this processor with the angle that vibration transducer forms; Based on this Identification Data; From this processor preset database, 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, the touch location when this method for detecting position touches parts in order to affirmation, and this method for detecting position comprises following implementation step:
Touch parts (can be provided with a display on these parts);
These parts produce a bending wave vibration after touching;
This bending wave vibration signal is by at least three or above vibration transducer reception (this vibration transducer can be a piezoelectric sensor);
One processor (this processor can be connected with a display), this processor connects each vibration transducer, and wherein: this processor is supposed a touch location, and to calculate this hypothesis touch location and any vibration transducer be first apart from S; The touch location of this processor calculating unit is second distance Y (the Y coordinate of touch location) with the real distance of this arbitrary vibration transducer; That adds up that each vibration transducer produces first deducts the absolute value behind the second distance Y apart from S, asks the accumulated value after adding up least error just to calculate the touch location coordinate again.
In sum, position detecting device of the present invention has following beneficial effect: 1) can not reduce the brightness and the contrast of display screen; 2) do not receive temperature, do not receive humidity, do not receive the ground connection situation different and change; 3) do not receive the restriction of resolution.So the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any be familiar with this technological personage all can be under spirit of the present invention and category, the foregoing description is modified or is changed.Therefore, have common knowledge the knowledgeable in the affiliated such as technical field, must contain by claim of the present invention not breaking away from all equivalence modifications of being accomplished under disclosed spirit and the technological thought or changing.
Claims (8)
1. position detecting device, this position detecting device touch location coordinate when confirming to touch parts 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 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 processes is touch location coordinates from the signal of the bending wave vibration of each vibration transducer to calculate when touching these parts.
2. position detecting device according to claim 1; It is characterized in that; This processor processes is the angle that calculates this bending wave vibration and vibration transducer formation from the signal of the bending wave vibration of each vibration transducer, to calculate the touch location when touching these parts.
3. position detecting device according to claim 1; It is characterized in that; Behind the angle that this processor processes forms 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; Do the identification affirmation with the amplitude and the bending wave vibration of the preset bending wave vibration of this processor with the angle that vibration transducer forms; Based on this Identification Data, from this processor presetting database, select the touch location coordinate when touching these parts.
4. position detecting device according to claim 1 is characterized in that, this position detecting device comprises:
These parts are provided with the vibration transducer more than three or three; This processor processes from the signal of the bending wave vibration of each vibration transducer is:
This processor is supposed a touch location, and calculates this hypothesis touch location and any vibration transducer is first distance;
The touch location of this processor calculating unit is a second distance with the real distance of this arbitrary vibration transducer;
First distance that each vibration transducer produces of adding up deducts the absolute value behind the second distance, asks the accumulated value after adding up minimum error just to calculate the touch location coordinate again.
5. according to claim 1,2,3 or 4 described position detecting devices, it is characterized in that this position detecting device comprises: a display, this display is connected with this processor.
6. position detecting device according to claim 5 is characterized in that, this vibration transducer is a piezoelectric sensor.
7. position detecting device according to claim 5 is characterized in that this display is located on these parts.
8. position detecting device according to claim 7 is characterized in that, this vibration transducer is a piezoelectric sensor.
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| CN201210185093.0A CN102750051B (en) | 2012-06-06 | 2012-06-06 | Position detection device and position detection method |
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| TWI479395B (en) * | 2014-01-09 | 2015-04-01 | Infilm Optoelectronic Inc | Light vieration touch apparatus |
| CN114310742A (en) * | 2021-12-21 | 2022-04-12 | 江苏隆丰电子有限公司 | Automobile wire harness assembling and clamping device |
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| TWI479395B (en) * | 2014-01-09 | 2015-04-01 | Infilm Optoelectronic Inc | Light vieration touch apparatus |
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| 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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