CN103365512A - Method and device for measuring signal - Google Patents
Method and device for measuring signal Download PDFInfo
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- CN103365512A CN103365512A CN2013100252794A CN201310025279A CN103365512A CN 103365512 A CN103365512 A CN 103365512A CN 2013100252794 A CN2013100252794 A CN 2013100252794A CN 201310025279 A CN201310025279 A CN 201310025279A CN 103365512 A CN103365512 A CN 103365512A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
The invention relates to a method and a device for measuring a signal. A coefficient table is established according to a plurality of predetermined phase positions, wherein each predetermined phase position is assigned with a coefficient. Chord waves are measured in the plurality of predetermined phase positions in every half cycle to generate measurement signals respectively, and weighting measurement signals are generated respectively on the basis of each measurement signal multiplied by the coefficient corresponding to the phase position in measurement. Afterwards, the weighting measurement signals are totaled up to generate a complete measurement signal representing a single-time measurement result.
Description
Technical field
The invention relates to a kind of method and apparatus of measurement signal, particularly a kind of pattern of signal in orthogonal that adopts is done the method and apparatus that signal is processed the measurement signal on basis.
Background technology
Existing known mutual capacitance type sensor (mutual capacitive sensor), comprise insulation top layer, the first conductive layer, dielectric layer, the second conductive layer, wherein the first conductive layer and the second conductive layer have respectively many first buss and the second bus, these buss can be to be made of the connecting line of a plurality of conducting strips with the conducting strip of connecting.
Carrying out mutual capacitance type when detecting, one of the first conductive layer and second conductive layer are driven, and another of the first conductive layer and the second conductive layer detected.For example, drive signal and be provided for one by one each bar first bus, and be provided the first bus that drives signal corresponding to each bar, the signal of detecting the second all buss represents the capacitive couplings signal that is provided confluce between the first bus of driving signal and all the second buss.Whereby, can obtain the capacitive couplings signal that represents confluce between all first buss and the second bus, become a capacitance image.
Accordingly, can obtain capacitance image when not touched as benchmark, by the difference between comparison basis and the follow-up capacitance image that detects, judge and whether approached or cover by the external conductive object, and further judge the position that is approached or cover.Yet, many noise are arranged in the environment around, such as the noise of low frequency or the noise of narrow frequency, may cause the deviation of erroneous judgement or position.
This shows, above-mentioned existing technology obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.Therefore how to found a kind of method and apparatus of measurement signal of new structure, also becoming the current industry utmost point needs improved target.
Summary of the invention
The object of the invention is to, overcome the defective that existing technology exists, and provide a kind of method and apparatus of measurement signal of new structure, technical matters to be solved is when the pattern that adopts signal in orthogonal is done basic that signal processes, can there be many odd harmonics with the square wave driving, near the interference that narrow frequency is arranged occurs in odd harmonic, can can't eliminate the impact of this interference.A purpose of the present invention is to set up a coefficient table according to a plurality of predetermined phases, wherein the designated coefficient of each predetermined phase.A plurality of predetermined phases in per semiperiod measure the string ripple to produce respectively measurement signal, and multiplication corresponding to phase place during again according to each measurement signal and measurement is to produce respectively the weighting measurement signal.The interference of higher hamonic wave afterwards, again each weighting measurement signal added up to produce the complete measurement signal that represents the single measurement, so that just can suppress to get off.
The object of the invention to solve the technical problems realizes by the following technical solutions.The method of a kind of measurement signal that proposes according to the present invention, comprising:
Receive the string ripple; Measure respectively the measurement signal of string ripple in a plurality of predetermined phases at least one cycle of string ripple; The product that each measurement signal in described at least one cycle of foundation multiply by respectively the sine value generation of the predetermined phase when measuring produces the weighting measurement signal in described at least one cycle; And all weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The method of aforesaid measurement signal is characterized in that more comprising: this string ripple one or one group of driving bus in touch-screen are provided; And receive this string ripple by driving one of many overlapping sensing buss of bus with described one or one group that are provided the string ripple in the touch-screen, one of described many sensing buss be via with described one or one group that is provided the string ripple drive the bus capacitive couplings this string ripple be provided.
The method of aforesaid measurement signal, it is characterized in that more comprising: the measurement signal that each measurement signal is converted to numeral by the measurement signal of simulation, the measurement signal that is wherein measured by the string ripple simulate, and the weighting measurement signal is that the sine value that measurement signal with numeral is multiplied by numeral produces digital product.
The method of aforesaid measurement signal it is characterized in that the weighting measurement signal is that measurement signal with numeral is multiplied by the product that round values produces numeral, and each sine value is to be multiplied by identical multiple to produce round values.
The method of aforesaid measurement signal, it is characterized in that more comprising: the weighting measurement signal that each weighting measurement signal is converted to numeral by the weighting measurement signal of simulation, wherein measurement signal is for simulation, and the weighting measurement signal of each simulation is to produce according to the multiple that the measurement signal by simulation zooms into the sine value of the predetermined phase when measuring.
The method of aforesaid measurement signal, all weighting measurement signals that it is characterized in that described at least one cycle always add to be implemented in the mode of integration, and measurement signal and weighting measurement signal are simulated.
The method of aforesaid measurement signal is characterized in that described predetermined phase is continuous arrangement, and adjacent phasetophase differs identical phase differential.
The method of aforesaid measurement signal is characterized in that phase differential is 60 degree.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The device of a kind of measurement signal that proposes according to the present invention comprising the analog quantity slowdown monitoring circuit, receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple; The analog-to-digital circuit converts the measurement signal of each simulation to the measurement signal of numeral; And processor, the product that the sine value of the predetermined phase when each digital measurement signal in described at least one cycle of foundation multiply by respectively measurement produces produces the weighting measurement signal of the numeral in described at least one cycle, and all digital weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The device of aforesaid measurement signal, the weighting measurement signal that it is characterized in that numeral are that the measurement signal with numeral is multiplied by the product that round values produces numeral, and each sine value is to be multiplied by identical multiple to produce round values.
The device of aforesaid measurement signal is characterized in that described predetermined phase is continuous arrangement, and adjacent phasetophase differs identical phase differential.
The device of aforesaid measurement signal is characterized in that phase differential is 60 degree.
The object of the invention to solve the technical problems realizes in addition more by the following technical solutions.The device of a kind of measurement signal that proposes according to the present invention comprising the analog quantity slowdown monitoring circuit, receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple; Amplifying circuit, the multiple of the sine value of the predetermined phase when zooming into measurement according to the measurement signal by simulation respectively produces the weighting measurement signal of a simulation; The analog-to-digital circuit converts the weighting measurement signal of each simulation to the weighting measurement signal of numeral; And processor, all digital weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The device of aforesaid measurement signal is characterized in that described predetermined phase is continuous arrangement, and adjacent phasetophase differs identical phase differential.
The device of aforesaid measurement signal is characterized in that phase differential is 60 degree.
The object of the invention to solve the technical problems also realizes in addition by the following technical solutions.The device of a kind of measurement signal that proposes according to the present invention comprising the analog quantity slowdown monitoring circuit, receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple; Amplifying circuit, the multiple of the sine value of the predetermined phase when zooming into measurement according to the measurement signal by simulation respectively produces the weighting measurement signal of a simulation; Integrating circuit measures signal integration to produce the complete measurement signal of simulation with the weighting of all simulations in described at least one cycle; And the analog-to-digital circuit, the complete measurement signal of each simulation is converted to the complete measurement signal of numeral.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The device of aforesaid measurement signal is characterized in that described predetermined phase is continuous arrangement, and adjacent phasetophase differs identical phase differential.
The device of aforesaid measurement signal is characterized in that phase differential is 60 degree.
The present invention compared with prior art has obvious advantage and beneficial effect.By above technical scheme as can be known, main technical content of the present invention is as follows: the method for a kind of measurement signal that proposes according to the present invention comprises: receive the string ripple; Measure respectively the measurement signal of string ripple in a plurality of predetermined phases at least one cycle of string ripple; The product that each measurement signal in described at least one cycle of foundation multiply by respectively the sine value generation of the predetermined phase when measuring produces the weighting measurement signal in described at least one cycle; And all weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.The device of a kind of measurement signal that proposes according to the present invention comprises: the analog quantity slowdown monitoring circuit receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple; The analog-to-digital circuit converts the measurement signal of each simulation to the measurement signal of numeral; And processor, the product that the sine value of the predetermined phase when each digital measurement signal in described at least one cycle of foundation multiply by respectively measurement produces produces the weighting measurement signal of the numeral in described at least one cycle, and all digital weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.The device of a kind of measurement signal that proposes according to the present invention comprises: the analog quantity slowdown monitoring circuit receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple; Amplifying circuit, the multiple of the sine value of the predetermined phase when zooming into measurement according to the measurement signal by simulation respectively produces the weighting measurement signal of a simulation; The analog-to-digital circuit converts the weighting measurement signal of each simulation to the weighting measurement signal of numeral; And a processor, all digital weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.The device of a kind of measurement signal that proposes according to the present invention comprises: the analog quantity slowdown monitoring circuit receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple; Amplifying circuit, the multiple of the sine value of the predetermined phase when zooming into measurement according to the measurement signal by simulation respectively produces the weighting measurement signal of a simulation; Integrating circuit measures signal integration to produce the complete measurement signal of simulation with the weighting of all simulations in described at least one cycle; And the analog-to-digital circuit, the complete measurement signal of each simulation is converted to the complete measurement signal of numeral.
By technique scheme, the method and apparatus of measurement signal of the present invention has following advantages and beneficial effect at least:
1, suppresses the interference of higher hamonic wave;
2, process the circuit that does not need complexity, only need the simple digital logical circuit to finish; And
3, adopt system of integers numerical value, with integer arithmetic, the advantage that tool is simplified than floating point arithmetic.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
Description of drawings
Figure 1A and 1B are the schematic diagram of mutual capacitance type sensor;
Fig. 1 C is the schematic diagram of mutual capacitance type detecting;
Fig. 2 is the schematic diagram that measurement signal is affected by the high order odd harmonic;
Fig. 3 measures the string ripple to produce respectively the schematic diagram of a measurement signal for a plurality of predetermined phases in per semiperiod;
Fig. 4 is the schematic diagram after measurement signal suppresses the impact of high order odd harmonic;
Fig. 5 is the schematic flow sheet according to the method for the measurement signal of the first embodiment of the present invention;
Fig. 6 is the circuit diagram according to the device of the measurement signal of the second embodiment of the present invention;
Fig. 7 is the circuit diagram according to the device of the measurement signal of the third embodiment of the present invention; And
Fig. 8 is the circuit diagram according to the device of the measurement signal of the fourth embodiment of the present invention.
[main element symbol description]
100: position detecting apparatus 110: display
120: touch-screen 120A: the first sensed layer
120B: the second sensed layer 130: driving/detecting unit
140: bus 140A, Tx: the first bus
140B, Rx: the second bus 160: controller
161: processor 162: internal memory
170: main frame 171: CPU (central processing unit)
173: storage element PWM: pulse width is adjusted signal
A: amplitude of vibration I: string ripple
61,71,81: analog quantity slowdown monitoring circuit 72,82: amplifying circuit
73,83: variable resistor 84: integrating circuit
ADC: analog-to-digital circuit CPU: processor
Vanalog: the measurement signal Vdigital of simulation: the measurement signal of numeral
VWanalog: the weighting measurement signal of simulation
VWdigital: the weighting measurement signal of numeral
VOanalog: the complete measurement signal of simulation
VOdigital: the complete measurement signal of numeral
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its embodiment of method and apparatus, structure, feature and the effect thereof of the measurement signal that foundation the present invention is proposed are described in detail as follows.
See also Figure 1A, for being applied to a kind of position detecting apparatus 100 of the present invention, comprise touch-screen 120, with driving/detecting unit 130.Touch-screen 120 has sensed layer.In example of the present invention, can comprise the first sensed layer 120A and the second sensed layer 120B, the first sensed layer 120A and the second sensed layer 120B have respectively a plurality of buss 140, and wherein a plurality of the second bus 140B of a plurality of the first bus 140A of the first sensed layer 120A and the second sensed layer 120B are overlapping.In another example of the present invention, a plurality of the first bus 140A and the second bus 140B can be configured in coplanar sensed layer.Driving/detecting unit 130 produces a sensitive information according to the signal of a plurality of buss 140.For example when the self-capacitance formula is detected, be the driven bus 140 of detecting, and when mutual capacitance type detect, be detecting be not have the directly part buss 140 of drivings of driven/detecting unit 130.In addition, touch-screen 120 can be to be configured on the display 110, and 110 of touch-screen 120 and displays can be configuration screen layer (shielding layer) (not showing in icon) to be arranged or do not configure screen layer.In preferable example of the present invention, in order to make the thickness of touch-screen 120 thinner, 110 of touch-screen 120 and displays do not configure screen layer.
Aforementioned the first bus and the second bus can be many capable buss and the row buss of arranging with row or column, can also be many first dimension buss and the second dimension bus of arranging with the first dimension and the second dimension, or along many first axle buss and the second axle bus of the first axle and the arrangement of the second axle.In addition, aforementioned the first bus and the second bus can be overlapping with quadrature to each other, can also be with nonopiate overlapping.For example in polar coordinate system, one of described the first bus or second bus can be radial arrangement, and another of described the first bus or the second bus can be annular arrangement.Moreover one of described the first bus or second bus can be drive bus, and another of described the first bus or the second bus can be the detecting bus.Described " the first dimension " all can be used to represent aforesaid " first " and " second " bus with " detecting ", " driven " with " by detecting " bus with " the second axle ", " driving " with " the second dimension ", " the first axle ", including but not limited to consist of orthogonal grid (orthogonal grids), can also be to consist of how much frameworks (geometric configurat ions) that other has the first dimension and the second dimension overlapping (intersecting) bus.
In another example of the present invention, 17 0 in controller 160 and main frame comprise transport interface, control module transmits data to main frame by transport interface, and those skilled in the art can know transport interface by inference and include but not limited to the various wired or wireless transport interface such as UART, USB, I2C, Bluetooth, WiFi, IR.In example of the present invention, the data of transmission can be position (such as coordinate), identification result (such as the gesture code), order, sensitive information or other controller 160 available information.
In example of the present invention, sensitive information can be the initial sensitive information (initial sensing information) that is produced by processor 161 controls, transfer to main frame 170 and carry out position analysis, identification etc. is judged, ordered to for example position analysis, gesture.In another example of the present invention, sensitive information can be to be analyzed first by processor 161, again the position that judges, gesture, order etc. is submitted to main frame 170.The present invention includes but be not limited to aforementioned example, those skilled in the art can know the interaction between other controller 160 and the main frame 170 by inference.
At the crossover region of each bus, upper with under bus consist of the two poles of the earth.Each crossover region can be considered the pixel (pixel) in the image (image), when having one or more external conductive objects to approach or touching, described image can be considered the image (such as the aspect (pattern) of finger touches in sensing apparatus) that photographs touching.
When driven bus was provided the driving signal, driven bus itself consisted of self-capacitance (self capacitance), and each crossover region on the driven bus consists of mutual capacitance (mutual capacitance).The detecting of aforesaid self-capacitance formula is the self-capacitance of all buss of detecting, be specially adapted to judge single external conductive object near to or in contact with.
Aforesaid mutual capacitance type detecting, when driven bus is provided the driving signal, by detecting electric capacity or the capacitance change that drives all crossover regions on buss with all sensed buss of driven bus different dimensions arrangement, to be considered as the row pixel in the image.Accordingly, the pixel of compiling all row namely consists of described image.When having one or more external conductive objects to approach or during touching, described image can be considered the image that photographs touching, be specially adapted to judge a plurality of external conductive objects near to or in contact with.
These buss (the first bus and the second bus) can be to be made of transparent or opaque material, for example can be to be made of transparent tin indium oxide (ITO).Structurally can be divided into single layer structure (SITO; Single ITO) with double-decker (DITO; Double ITO).The ordinary person of the art can know the material of other bus by inference, in no longer narration.For example, CNT.
In example of the present invention, be with laterally as first direction, and with vertically as second direction, therefore horizontal bus is the first bus, and bus is the second bus longitudinally.Those skilled in the art can know one of above-mentioned example that is illustrated as invention by inference, are not to limit the present invention.For example, can be as first direction, and with laterally as second direction with vertically.In addition, the first bus can be identical with the number of the second bus, also can be different, and for example, the first bus has the N bar, and the second bus has the M bar.
When carrying out the detecting of two-dimensions mutual capacitance type, the driving signal that exchanges sequentially is provided for each bar first bus, and obtaining a dimension sensitive information that is provided the bus that drives signal corresponding to each bar via the signal of described the second bus, set then consists of a two-dimensions sensitive information corresponding to the sensitive information of all the first buss.A described dimension sensitive information can be the signal generation according to described the second bus, also can be to produce according to the signal of described the second bus and the measures of dispersion of benchmark.In addition, sensitive information can be that electric current, voltage, capacitive couplings amount, the quantity of electric charge or other characteristic electron of basis signal produces, and can be that form with analog or digital exists.
There is not actually the external conductive object to approach or when covering touch-screen, or system is not when judging that the external conductive object approaches or covering touch-screen, position detecting apparatus can produce benchmark by the signal of described the second bus, and benchmark presents is stray capacitance on the touch-screen.Sensitive information can be to produce according to the signal of the second bus, or deducting benchmark according to the signal of the second bus produces.
See also Fig. 1 C, be the schematic diagram of above-mentioned two-dimensions mutual capacitance type detecting.Send pulse width adjustment (PWM) signal by the first bus Tx end, the capacitive couplings through between the first bus Tx and the second bus Rx can be received the frequency identical with the Tx end and the signal of gap fixed phase difference in the second bus Rx termination.
The present invention proposes a kind of method and apparatus of measurement signal, is to adopt the pattern of signal in orthogonal to do the basis that signal is processed.For example, the signal that receives that the Rx termination is received is S (t)=Asin (ω t), and wherein A is amplitude.
But the circuit of general signal multiplication is difficult for implementing at circuit, implements so existing known techniques is all adopted the mode of square wave, becomes to be
I=∫(PWM)sgn(PWM)dt。
But the Fourier series of square wave itself launches and can be expressed as
Wherein S (t)=square wave or sine wave+n (t), wherein n (t) is noise or interference,
The component that can discovery can have odd harmonic.
Therefore, near the interference that narrow frequency is arranged occurs in odd harmonic, can can't eliminate the impact of this interference, as shown in Figure 2.Especially when the data of using analog-to-digital circuit ADC to get same phase in each semiperiod, then addition again behind the ∑ (positive half period-negative half-cycle) is larger for the impact of high order odd harmonic.
Therefore, under optimal mode of the present invention, be to adopt the string ripple to drive, and set up a coefficient table according to a plurality of predetermined phases, wherein the designated coefficient of each predetermined phase.In preferable example of the present invention, coefficient is the multiple of the sine value of predetermined phase, and is as shown in the table.
| Phase place | Coefficient |
| 60° | 1 |
| 90° | 2 |
| 1?50° | 1 |
| 210° | -1 |
| 270° | -2 |
| 330° | -1 |
Table 1
In addition, a plurality of predetermined phases in per semiperiod measure the string ripple to produce respectively measurement signal, as shown in Figure 3, wherein measure altogether at least semiperiod.Afterwards, multiplication corresponding to phase place during according to each measurement signal and measurement to produce respectively the weighting measurement signal, adds up to produce the complete measurement signal that represents the single measurement with each weighting measurement signal again.
The present invention can also adopt pulse width adjustment (PWM) signal.Although in table 1 and Fig. 4, per cycle measures 6 measurement signals, each phase place that differs from 60 degree that measures, the usefulness of only giving an example for ease of the present invention, be not to limit the present invention, the art has knows that usually it can be to measure 2,4 or more measurement signal that the knowledgeable can know per cycle by inference, and measurement can be that the phase place that differs identical can be the phase place that differs different also at every turn, and the present invention is not limited.
According to above-mentioned, complete measurement signal can be
Consult aforementioned
AD (k) is equivalent to sin (m ω t), and C (k) is equivalent to sin (n ω t), wherein m=n.In table 1, coefficient value is 2 times of sine value of phase place, and this is that integer arithmetic has advantages of than floating point arithmetic to be simplified because just in time be integer after amplifying twice.Accordingly, in example of the present invention, more comprise the integer with C (k), be about to be multiplied by multiple and present with integer by C (k).Accordingly, the interference of higher hamonic wave just can suppress to get off, as shown in Figure 4.
Aforesaid each weighting measurement signal is added up can be to adopt DLC (digital logic circuit) to reach.For example be to convert the measurement signal of simulating to digital measurement signal signal after measuring the measurement signal (such as AD (k)) of simulating, carry out again the computing that each weighting measurement signal is added up.In other words, processing does not in this way need complicated circuit, only needs the simple digital logical circuit to finish.
According to above-mentioned, in the first embodiment of the present invention, be a kind of method of measurement signal, see also shown in Figure 5.At first, shown in step 510, receive the string ripple.The string ripple can be to be provided by aforesaid controller, and string ripple one or one group of driving bus in touch-screen are provided.In addition, the string ripple is to receive by driving one of many overlapping sensing buss of bus with described one or one group that are provided the string ripple in the touch-screen, one of described many sensing buss be via with described one or one group that is provided the string ripple drive the bus capacitive couplings this string ripple be provided.Afterwards, shown in step 520, measure respectively the measurement signal of string ripple in a plurality of predetermined phases at least one cycle of string ripple, wherein measurement signal can be simulation or numeral.Next, shown in step 530, the product that each measurement signal in described at least one cycle of foundation multiply by respectively the sine value generation of the predetermined phase when measuring produces the weighting measurement signal in described at least one cycle, and wherein the weighting measurement signal can be simulation or digital.Again next, shown in step 540, all weighting measurement signals in described at least one cycle are added up to produce complete measurement signal, wherein complete measurement signal can be simulation or numeral.
In example of the present invention, it is the measurement signal that each measurement signal is converted to numeral by the measurement signal of simulation, the measurement signal that is wherein measured by the string ripple simulate, and the weighting measurement signal is that the sine value that measurement signal with numeral is multiplied by numeral produces digital product.Similarly, all weighting measurement signals in described at least one cycle being added up to produce complete measurement signal also is to carry out in the mode of numeral.In addition, the weighting measurement signal is that the measurement signal with numeral is multiplied by the product that round values produces numeral, and each sine value is to be multiplied by identical multiple to produce round values.
In another example of the present invention, it is the weighting measurement signal that each weighting measurement signal is converted to numeral by the weighting measurement signal of simulation, wherein measurement signal is for simulation, and the weighting measurement signal of each simulation is to produce according to the multiple that the measurement signal by simulation zooms into the sine value of the predetermined phase when measuring.In addition, the totalling of weighting measurement signal can be to add up with analog form, also can be to add up with digital form.For example, all weighting measurement signals in described at least one cycle always add to be implemented in the mode of integration, and as being implemented by integrating circuit, and measurement signal and weighting measurement signal are simulated.Again for example, the weighting measurement signal of all simulations is to carry out first analog-to-digital, producing the weighting measurement signal of all simulations, and then adds up.
In example of the present invention, described predetermined phase is continuous arrangement, and adjacent phasetophase differs identical phase differential, for example 60 degree.
Fig. 6 is according to the device of a kind of measurement signal of second embodiment of the present invention proposition, comprising: analog quantity slowdown monitoring circuit 61, analog-to-digital circuit ADC, processor CPU.Analog quantity slowdown monitoring circuit 61 receives the string ripples, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple.In example of the present invention, the string ripple can be that the mode with electric current presents, and turns potential circuit and the analog quantity slowdown monitoring circuit can be electric current, the electric current of string ripple I is converted to the measurement signal Vanalog of simulation according to reference resistance R.In addition, analog-to-digital circuit ADC converts the measurement signal Vanalog of each simulation to the measurement signal Vdigital of numeral.In addition, the product that the sine value of the predetermined phase when each digital measurement signal Vdigital in processor described at least one cycle of foundation multiply by respectively measurement produces produces the weighting measurement signal of the numeral in described at least one cycle, and all digital weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.In example of the present invention, the weighting measurement signal of numeral is that the measurement signal Vdigital with numeral is multiplied by the product that round values produces numeral, and each sine value is to be multiplied by identical multiple to produce round values.
Fig. 7 is according to the device of a kind of measurement signal of third embodiment of the present invention proposition, comprising: analog quantity slowdown monitoring circuit 71, amplifying circuit 72, analog-to-digital circuit ADC, processor CPU.Analog quantity slowdown monitoring circuit 71 receives the string ripples, and measures respectively the measurement signal Vanalog of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple.The multiple of the sine value of the predetermined phase when amplifying circuit 72 zooms into measurement according to the measurement signal Vanalog by simulation respectively produces the weighting measurement signal VWanalog of a simulation.To decide described multiple with one group of variable resistor 73 in example of the present invention.The analog-to-digital circuit is the weighting measurement signal VWdigital that the weighting measurement signal VWanalog with each simulation converts numeral to, next by processor all digital weighting measurement signal VWdigital in described at least one cycle is added up to produce complete measurement signal again.
Fig. 8 is according to the device of a kind of measurement signal of fourth embodiment of the present invention proposition, comprising: analog quantity slowdown monitoring circuit 81, amplifying circuit 82, integrating circuit 84, analog-to-digital circuit ADC.Analog quantity slowdown monitoring circuit 81 receives the string ripples, and measures respectively the measurement signal Vanalog of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple.The multiple of the sine value of the predetermined phase when amplifying circuit 82 zooms into measurement according to the measurement signal Vanalog by simulation respectively produces the weighting measurement signal VWanalog of a simulation.To decide described multiple with one group of variable resistor 83 in example of the present invention.Integrating circuit 84 is simulated the weighting measurement signal VWanalog integration of all simulations in described at least one cycle with generation complete measurement signal VOanalog, again by analog-to-digital circuit ADC, the complete measurement signal VOanalog of each simulation is converted to the complete measurement signal VOdigital of numeral afterwards.
Aforesaid analog quantity slowdown monitoring circuit also can be integrating circuit or keep and sample circuit, or other can receive the circuit of string ripple, and the present invention is not limited.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (18)
1. the method for a measurement signal is characterized in that comprising:
Receive the string ripple;
Measure respectively the measurement signal of string ripple in a plurality of predetermined phases at least one cycle of string ripple;
The product that each measurement signal in described at least one cycle of foundation multiply by respectively the sine value generation of the predetermined phase when measuring produces the weighting measurement signal in described at least one cycle; And
All weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.
2. the method for measurement signal as claimed in claim 1 is characterized in that more comprising:
This string ripple one or one group of driving bus in touch-screen are provided; And
Receive this string ripple by driving one of many overlapping sensing buss of bus with described one or one group that are provided the string ripple in the touch-screen, one of described many sensing buss be via with described one or one group that is provided the string ripple drive the bus capacitive couplings this string ripple be provided.
3. the method for measurement signal as claimed in claim 1 is characterized in that more comprising:
Each measurement signal is converted to the measurement signal of numeral by the measurement signal of simulation, wherein simulate by the measurement signal that the string ripple measures, and the weighting measurement signal is that the sine value that measurement signal with numeral is multiplied by numeral produces digital product.
4. the method for measurement signal as claimed in claim 1 it is characterized in that the weighting measurement signal is that measurement signal with numeral is multiplied by the product that round values produces numeral, and each sine value is to be multiplied by identical multiple to produce round values.
5. the method for measurement signal as claimed in claim 1 is characterized in that more comprising:
Each weighting measurement signal is converted to the weighting measurement signal of numeral by the weighting measurement signal of simulation, wherein measurement signal is for simulation, and the weighting measurement signal of each simulation is to produce according to the multiple that the measurement signal by simulation zooms into the sine value of the predetermined phase when measuring.
6. the method for measurement signal as claimed in claim 1, all weighting measurement signals that it is characterized in that described at least one cycle always add to be implemented in the mode of integration, and measurement signal and weighting measurement signal are simulated.
7. the method for measurement signal as claimed in claim 1 is characterized in that described predetermined phase is continuous arrangement, and adjacent phasetophase differs identical phase differential.
8. the method for measurement signal as claimed in claim 1 is characterized in that phase differential is 60 degree.
9. the device of a measurement signal is characterized in that comprising:
The analog quantity slowdown monitoring circuit receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple;
The analog-to-digital circuit converts the measurement signal of each simulation to the measurement signal of numeral; And
Processor, the product that the sine value of the predetermined phase when each digital measurement signal in described at least one cycle of foundation multiply by respectively measurement produces produces the weighting measurement signal of the numeral in described at least one cycle, and all digital weighting measurement signals in described at least one cycle are added up to produce complete measurement signal.
10. the device of measurement signal as claimed in claim 9, the weighting measurement signal that it is characterized in that numeral are that the measurement signal with numeral is multiplied by the product that round values produces numeral, and each sine value is to be multiplied by identical multiple to produce round values.
11. the device of measurement signal as claimed in claim 9 is characterized in that described predetermined phase is continuous arrangement, adjacent phasetophase differs identical phase differential.
12. the device of measurement signal as claimed in claim 11 is characterized in that phase differential is 60 degree.
13. the device of a measurement signal is characterized in that comprising:
The analog quantity slowdown monitoring circuit receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple;
Amplifying circuit, the multiple of the sine value of the predetermined phase when zooming into measurement according to the measurement signal by simulation respectively produces the weighting measurement signal of a simulation;
The analog-to-digital circuit converts the weighting measurement signal of each simulation to the weighting measurement signal of numeral; And
Processor adds up to produce complete measurement signal with all digital weighting measurement signals in described at least one cycle.
14. the device of measurement signal as claimed in claim 13 is characterized in that described predetermined phase is continuous arrangement, adjacent phasetophase differs identical phase differential.
15. the device of measurement signal as claimed in claim 14 is characterized in that phase differential is 60 degree.
16. the device of a measurement signal is characterized in that comprising:
The analog quantity slowdown monitoring circuit receives the string ripple, and measures respectively the measurement signal of the simulation of string ripple in a plurality of predetermined phases at least one cycle of string ripple;
Amplifying circuit, the multiple of the sine value of the predetermined phase when zooming into measurement according to the measurement signal by simulation respectively produces the weighting measurement signal of a simulation;
Integrating circuit measures signal integration to produce the complete measurement signal of simulation with the weighting of all simulations in described at least one cycle; And
The analog-to-digital circuit converts the complete measurement signal of each simulation to the complete measurement signal of numeral.
17. the device of measurement signal as claimed in claim 16 is characterized in that described predetermined phase is continuous arrangement, adjacent phasetophase differs identical phase differential.
18. the device of measurement signal as claimed in claim 17 is characterized in that phase differential is 60 degree.
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| CN104750328A (en) * | 2013-12-31 | 2015-07-01 | 禾瑞亚科技股份有限公司 | Mutual capacitance type touch control device and sine wave measuring method thereof |
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| CN106201101B (en) | 2019-03-15 |
| TWI485611B (en) | 2015-05-21 |
| TW201339939A (en) | 2013-10-01 |
| CN106201101A (en) | 2016-12-07 |
| CN103365512B (en) | 2016-08-24 |
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