CN106104671A - Detecting system for stringed musical instrument - Google Patents

Detecting system for stringed musical instrument Download PDF

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Publication number
CN106104671A
CN106104671A CN201580014303.1A CN201580014303A CN106104671A CN 106104671 A CN106104671 A CN 106104671A CN 201580014303 A CN201580014303 A CN 201580014303A CN 106104671 A CN106104671 A CN 106104671A
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CN
China
Prior art keywords
described
conduction
signal
configured
phase inverter
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CN201580014303.1A
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Chinese (zh)
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CN106104671B (en
Inventor
S·米兹拉希
B·Z·特依
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O.M.B.吉他有限公司
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Priority to US201461954937P priority Critical
Priority to US61/954,937 priority
Application filed by O.M.B.吉他有限公司 filed Critical O.M.B.吉他有限公司
Priority to PCT/IL2015/050244 priority patent/WO2015140783A1/en
Publication of CN106104671A publication Critical patent/CN106104671A/en
Application granted granted Critical
Publication of CN106104671B publication Critical patent/CN106104671B/en

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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/32Constructional details
    • G10H1/34Switch arrangements, e.g. keyboards or mechanical switches peculiar to electrophonic musical instruments
    • G10H1/342Switch arrangements, e.g. keyboards or mechanical switches peculiar to electrophonic musical instruments for guitar-like instruments with or without strings and with a neck on which switches or string-fret contacts are used to detect the notes being played
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H2220/00Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155User input interfaces for electrophonic musical instruments
    • G10H2220/165User input interfaces for electrophonic musical instruments for string input, i.e. special characteristics in string composition or use for sensing purposes, e.g. causing the string to become its own sensor
    • G10H2220/171User input interfaces for electrophonic musical instruments for string input, i.e. special characteristics in string composition or use for sensing purposes, e.g. causing the string to become its own sensor using electrified strings, e.g. strings carrying coded or AC signals for transducing, sustain, fret length or fingering detection
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H2220/00Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155User input interfaces for electrophonic musical instruments
    • G10H2220/265Key design details; Special characteristics of individual keys of a keyboard; Key-like musical input devices, e.g. finger sensors, pedals, potentiometers, selectors
    • G10H2220/275Switching mechanism or sensor details of individual keys, e.g. details of key contacts, hall effect or piezoelectric sensors used for key position or movement sensing purposes; Mounting thereof
    • G10H2220/295Switch matrix, e.g. contact array common to several keys, the actuated keys being identified by the rows and columns in contact
    • G10H2220/301Fret-like switch array arrangements for guitar necks

Abstract

Thering is provided a kind of detecting system, for detecting the happy symbol played on the stringed musical instrument have fingerboard, described fingerboard is provided with a plurality of conduction sound column and conduction string.Described system includes at least one conductor being connected to each sound column;Phase inverter, there is the first end being connected to described conductor and the second end being connected to described conduction string, described phase inverter is configured for carrying out logical inversion to therefrom transmitting the signal passed through, make when described conduction string is pressed against wherein sound column, thus allow signal therefrom to transmit to pass through, described signal with a frequency between two kinds of logic states the most anti-phase, described frequency depends on the distance between phase inverter and sound column;Frequency detector, is configured for measuring described frequency;And controller, it is configured for determining the described sound column position along fingerboard according to described frequency, thus detects described note.

Description

Detecting system for stringed musical instrument

Technical field

The present invention relates generally to a kind of detecting system for stringed musical instrument, particularly relate to a kind of detection and the inspection of transmission data Examining system and method, these data represent the string music played on the fingerboard of stringed musical instrument.

Background technology

Exist multiple known to be provided with the stringed musical instrument of detecting system, this detecting system detects the note played. US4635518 discloses a kind of electric stringed instrument with electric insulation fingerboard.Fingerboard is provided with horizontal stroke at required along its length Across some segmentation sound columns (fret) that its upper surface is attached.Each sound column includes the some conduction sound column sections being electrically insulated from each other.Happy Can arrange any number of string on device, every string is disposed adjacent and associates with the single sound column section of each segmentation sound column.Use Scale generator (octave generator) and octave manufacture device (octave dividers) and carry out selectivity and provide wherein one The sound column section of bar sound column, its at least one known in reference frequency there is the signal of telecommunication.These strings are being interval relative to sound column section It is attached on musical instrument to relation.One string is moved and contacts the circuit that one of them sound column section completes to have at least one frequency, This frequency is equal to the signal frequency being supplied to sound column section.Identical string is moved and contacts different sound column sections and complete to have at least A kind of different circuit of different frequency.If press many strings to complete dry circuit simultaneously simultaneously, each circuit can produce some not Same frequency.The amplitude output of musical instrument is depended on and applies to the voltage of every string and the transducer that operated by hands (tranducer) control.

US2012017748 discloses a kind of digital music instruments, including fingerboard and extend above at fingerboard one or more String.This musical instrument farther includes a circuit and a transceiver, and circuit produces according to the position relevant to string contact on fingerboard Raw digital signal, digital data transmission is produced staff (musical notation) to based on this digital signal by transceiver Processing means.

US8454418 discloses a kind of game console for computer game application, and it has one or many Root string.A plurality of sound column can be arranged on fingerboard and in the lower floor of string.Sound column can include the conduction that can be electrically insulated from each other District, and the corresponding different string in each region.Can include that polyphony picks up, it has the multiple line coilings coupleding to the return of corresponding magnetic Circle, the pickup of this polyphony can be applicable to be detected playing of at least string by the user of game console.Output signal can be from Controller sends to game application, and this game application indicates the fingering of game console and plays game console Moment.Also describe multi-modal device.Band string equipment can be used as game console and musical instrument.

WO2013109657 discloses a kind of electric stringed instrument exercise apparatus, and it can be configured for performing in following steps One or more:

Detection finger position and/or string when formed to the sound column contact on finger or fingerboard suitable note or chord, Represent that the correct position on finger or fingerboard is to form note or chord and to detect when to select string (such as, bullet intuitively Play).Electric stringed instrument exercise apparatus can send sound with note and chord form.Electric stringed instrument exercise apparatus can include leading to Letter module, communicates for calculating device with other, and other calculates device and includes mobile phone and panel computer.Electric stringed instrument is practised Device can calculate the application program on device alternately with other, to assist how user learning plays stringed musical instrument further.

US2013247744 discloses a kind of stringed musical instrument being furnished with electric conductor, this electric conductor and the fingerboard being arranged on stringed musical instrument In sound column electrical connection.Described stringed musical instrument is also equipped with the light-emitting component of the string electrical contact of power supply and musical instrument (an embodiment In, light emitting diode) and other electric conductor that the element of this invention is electrically connected.By electric current will can be transmitted Arbitrary string is pressed against the arbitrary sound column that can transmit electric current, and this sound column is connected to include the circuit of described electronic component, described Closing of circuit and make light-emitting component luminous, this light-emitting component associates with the string being pressed against sound column.

JP2009271484 discloses a kind of for sensing contact/non-contacting sensing device, and it is by making string and sound column It is in conduction state and constitutes, and by producing in the performance devices of stringed musical instrument with the performance devices of sensing device interlocking Raw default light.

Summary of the invention

According to an aspect of the present invention, it is provided that a kind of stringed musical instrument fingerboard with detecting system combination, described fingerboard has edge Its length is arranged on a plurality of conduction sound column of diverse location and extends up and spaced apart with sound column along fingerboard length At least conduction string.Described detecting system includes at least one conductor arranged along fingerboard length being connected to each sound column; Phase inverter, has and is connected to the first end of described conductor and the second end of at least conduction string described in being connected to, and be configured to For carrying out logical inversion to therefrom transmitting the signal passed through so that when described at least conduction string is pressed against wherein one During bar sound column, thus allow signal therefrom to transmit and pass through, described signal with a frequency between two kinds of logic states the most anti- Phase, described frequency depends on the distance between phase inverter and sound column;Frequency detector, is used for measuring described frequency;And control Device, for determining the described sound column position along fingerboard according to described frequency.

Described fingerboard can include many conduction strings.

Described conductor can include two conductors of each setting in the most described many conduction strings so that for entirely In many conduction strings described in portion, said two conductor and described many conduction strings, the average distance of each is identical.

Described conduction string can be configured for vibration, thus produces musical sound.Described conduction string can include being wound on non-leading Conductive material in battery core.Described conduction string and described a plurality of conduction sound column are configured to, it is allowed to therefrom transmit low-voltage current, make Obtain and do not affected by user's finger.Each in described many conduction strings can be configured for receiving the letter from phase inverter Number.

Described phase inverter can be configured for selecting a wherein data output lead, and each DOL Data Output Line is connected to institute State wherein in many conduction strings.

Described combination can include having input and the demultiplexer of output, described input be configured for receiving from The input signal of described phase inverter, described output is configured for selecting a wherein data output lead, each DOL Data Output Line It is connected to wherein in described many conduction strings.

Described phase inverter is configured for anti-phase for the input voltage of counterlogic 1 output voltage for counterlogic 0.

Described combination can farther include a controller, and described controller is configured for detecting described many conduction strings In which root be pressed against wherein sound column.

Described controller and described frequency detector can be integrated in CPU module.

Described combination can farther include an electronic component, and described electronic component is connected to described phase inverter, and configuration For for described signal is postponed, thus increasing the wavelength of this signal.Described electronic component can be capacitor.

According to a further aspect in the invention, it is provided that a kind of detecting system, for playing on the stringed musical instrument have fingerboard Note detect, described fingerboard be provided with a plurality of conduction sound column and along fingerboard extend at least one conduction string.Described inspection Examining system includes at least one conductor being connected to each sound column;Phase inverter, has the first end and the company being connected to described conductor Being connected to the second end of described conduction string, described phase inverter is configured for carrying out logical inversion to therefrom transmitting the signal passed through, Make when described conduction string is pressed against wherein sound column, thus allow signal therefrom to transmit and pass through, described signal with One frequency is the most anti-phase between two kinds of logic states, and described frequency depends on the distance between phase inverter and sound column;Frequency Detector, is configured for measuring described frequency;And controller, it is configured for determining described sound column edge according to described frequency The position of fingerboard, thus detects described note.

Described phase inverter can be configured for selecting a wherein data output lead, and each DOL Data Output Line is configured for In being connected to one of musical instrument conduction string, described musical instrument has the many conduction strings extended along its fingerboard.

Described detection can farther include have input and the demultiplexer of output, and described input is configured for connecing Receiving the input signal from described phase inverter, described output is configured for selecting a wherein data output lead, each data Output lead is connected to wherein in described many conduction strings.

First end of described phase inverter can be input, and described second end is outfan.Described phase inverter is configured for In by anti-phase for the input voltage of counterlogic 1 output voltage for counterlogic 0.

Described detecting system can farther include a controller, and described controller is configured for detecting described many and leads Which root in electricity string is being pressed against wherein sound column.

Described detecting system can farther include a capacitor, and described capacitor is connected to described phase inverter, and configuration For for forming signal resonance in described signal, being consequently for making signal delay, thus increase signal wavelength.

Described detecting system can farther include a power supply, for producing the signal by conduction string.

Described detecting system can farther include have input and the demultiplexer of output, and described input is configured for In receiving the input signal from described phase inverter, described output is configured for selecting a wherein data output lead, each DOL Data Output Line is connected to wherein in described many conduction strings.

Described phase inverter can be configured for selecting a wherein data output lead, and each DOL Data Output Line is configured for In being connected to one of musical instrument conduction string, described musical instrument has the many conduction strings extended along its fingerboard.Described detecting system energy Enough farther including have input and the demultiplexer of output, described input is configured for receiving from described phase inverter Input signal, described output is configured for selecting a wherein data output lead, and each DOL Data Output Line is connected to described many In root conduction string wherein one.

Described detecting system can farther include a controller, and described controller is configured for detecting described many and leads Which root in electricity string is being pressed against wherein sound column.

Described detecting system can farther include an electronic component, and described electronic component is connected to described phase inverter, and It is configured for described signal is postponed, thus increases the wavelength of this signal.Described electronic component is capacitor, described electricity Container is configured in described signal forming signal resonance, thus makes this signal delay.

In accordance with a further aspect of the present invention, it is provided that a kind of happy symbol to playing on the stringed musical instrument have fingerboard detects Method, described fingerboard be provided with a plurality of conduction sound column and along fingerboard length extend at least one conduction string, each conduction sound Post is connected to a conductor.Described method includes producing the signal of telecommunication by conduction string, when pressing conduction string against sound column, institute State the signal of telecommunication can transmit by wherein sound column;By phase inverter, described signal carried out logical inversion, described phase inverter There is the first end being connected to conductor and the second end being connected to conduction string so that when pressing described conduction string against wherein one Described in bar during sound column, thus allowing described signal to transmit by conductor, described signal is pressed between two logic states with a frequency The most anti-phase, described frequency depends on the distance between described phase inverter and described sound column;Described by frequency detector detection Frequency;The described sound column position along fingerboard is calculated according to described frequency;And determine according to described position and to play on musical instrument Note.

In accordance with a further aspect of the present invention, it is provided that a kind of detecting system, for playing on the stringed musical instrument have fingerboard Note detect, described fingerboard is provided with a plurality of spaced apart conduction sound column and extend above at least at described sound column Root conduction string, each conduction sound column is connected to a conductor.Described detecting system includes a power supply, for producing by conduction string Signal.Phase inverter, has the first end being connected to conductor and the second end being connected to conduction string;Frequency detector, is configured for In measuring described frequency;And controller, it is configured for determining the described sound column position along fingerboard according to described frequency.Institute State phase inverter to be configured for will transmit through the signal of this phase inverter and carry out logical inversion so that when conduction string is pressed against Wherein during a described sound column, thus allow described signal therefrom to transmit and pass through, described signal with a frequency at two kinds of logic shapes Between state the most anti-phase, described frequency depends on the distance between described phase inverter and described sound column.

Accompanying drawing explanation

In order to understand present disclosure and understand how it can implement in practice, only pass through referring now to accompanying drawing Non-limiting example describes embodiment, wherein:

Fig. 1 is the block diagram being construction and operation of fingerboard and detecting system according to one embodiment of the invention;

Fig. 2 is the block diagram being construction and operation of fingerboard and detecting system according to another embodiment of the present invention;

Fig. 3 is the graphic representation of the exemplary signal produced by the detecting system in Fig. 1;And

Fig. 4 is the graphic representation of the exemplary signal produced by the detecting system in Fig. 2.

Detailed description of the invention

Fig. 1 shows the schematic diagram of the fingerboard 10 of musical instrument (not shown), and including substrate 11, it has and is mounted transversely thereto Multiple conduction sound column 14a to 14f and in the case of not contacting sound column above sound column along fingerboard length extend Many conduction string 12a-12f.Conduction string 12a-12f and conduction sound column 14a-14f can be configured to, it is allowed to is transmitted by them Low-voltage current, such as, user's sensing or the electric current not affected.

But conduction string 14a-14f can the most controllably vibrate.Conduction string 14a-14f can be by such as homogenous materials such as steel Constitute, or can have the core of a kind of material, this core is wound around other material, such as, is wound with the plastic core of metal wire.Rear In a kind of situation, one of which or bi-material are all made of an electrically conducting material.

It should be appreciated that the certain types of requirement of the musical instrument according to mounted thereon fingerboard, string and the quantity of sound column Can change.Fingerboard 10 farther includes detecting system 20, be configured for detecting wherein string 12a-12f be pressed against Sound column, enabling chord and the note of performance detected.

Detecting system 20 includes that at least one extending and being connected to each sound column 14a-14f along the length of fingerboard 10 is led Body 22.In conductor 22 can be integrated in substrate 11 or can install on the substrate 11.

Detecting system 20, including the conductor 22 being arranged on fingerboard 10 side or two conductors 22,22a, such as Fig. 1 and 2 Shown in so that an end of each sound column 14a-14f is connected to conductor 22, and the other end is then connected to another conductor 22a.The advantage with more than one conductor will be described below.

Detecting system 20 farther includes phase inverter 23 (also referred to as NOT logic), and it has input 24a and outfan 24b And be configured for exporting a voltage at outfan 24b, this voltage represents the logic electricity contrary with the voltage at input 24a Flat.If it is to say, input voltage counterlogic 1, then the output voltage counterlogic 0 of phase inverter, vice versa.Phase inverter Can be any known phase inverter, such as NC7SZ14 etc., or sign-changing amplifier.

The input 24a of phase inverter 23 is connected to conductor 22,22a so that can be by anti-phase from the signal of telecommunication therein Device 23 carries out logical inversion.The outfan 24b of phase inverter 23 can be connected to string 12a-12f so that inversion signal can transmit To string 12a-12f.Due to expectation detection string be pressed against sound column and detect any root string 12a-12f and be pressed, every string 12a-12f can individually and separately be connected to phase inverter 23.This can be accomplished by, such as, and string 12a-12f The outfan of phase inverter 23 it is connected to by demultiplexer (demultiplexer) 30 (also referred to as demultiplexing (demux)).Many Road decomposer 30 can include inputting 32a and output 32b, and input 32a is configured for receiving the outfan from phase inverter 23 The input signal of 24b, output 32b is configured for selecting wherein in a plurality of DOL Data Output Line 34a-34f, each number The terminal of a wherein string 12a-12f it is connected to according to output lead.

Demultiplexer 30 can be configured for providing the example in a cycle so that during each example, therein Output 32b is only connected to a wherein data output lead 34a-34f.Output 32b can be configured for selecting in order wherein One data output lead 34a-34f so that each data output lead 34a-34f receives the letter from phase inverter 23 in order Number.Owing to each data output lead 34a-34f is connected to a wherein conduction string 12a-12f, therefore due to demultiplexer The operation of 30 and output signal can be transmitted by demultiplexer 30, and make to conduct electricity string for one time in the way of one 12a-12f is sequentially connected to the outfan 24b of phase inverter 23.

Alternatively, the outfan 24b of phase inverter 23 can be connected to string 12a-12f by such as the analog switches such as MAX459x.

Detecting system 20 farther includes frequency detector and controller, and frequency detector is configured for detecting outfan The signal frequency of 24b, the purpose of controller is discussed in detail below.Frequency detector and controller can be integrated in CPU module In 35, CPU module 35 is connected to the outfan 24b of phase inverter 23.It should be appreciated that due to conduction string 12a-12f, conductor 22 And phase inverter 23 is collectively forming circuit, it is possible to any position rate of connections detector in the circuit, i.e. in output Hold 24b, input 24a or be connected to conductor 22,22a.

Detecting system farther includes the power supply (not shown) for producing the signal of telecommunication.When starting detecting system, power supply Transmitting telecommunication number is by conduction string 12a-12f.

As mentioned above, sound column 14a-14f is made of an electrically conducting material, therefore by wherein one conduction string 12a-12f Press against wherein sound column 14a-14f, promote by conducting electricity the electricity that string, conductor 22 and phase inverter 23 formed accordingly Road closes.Such as, if press conduction string 12f against sound column 14e, then closing of circuit and output signal are from the output of phase inverter 23 End 24b transmission is back to input 24a by demultiplexer 30, conduction string 12f, sound column 14e and conductor 22.If it is defeated Go out the voltage counterlogic 0 of signal, be then transmitted back to the voltage also counterlogic of input 24a by conduction string 12f and conductor 22 0.As response, phase inverter 23 output has the output signal of the voltage of counterlogic 1.

Output signal provides right by the transmission further of conduction string 12f, sound column 14e and conductor 22 at input 24a Answering the voltage of logic 1, it then passes through phase inverter 23 at the anti-phase voltage for counterlogic 1 of outfan.If conduction string 12f quilt Pressing against sound column 14e, the transmission of the output signal between outfan 24b and input 24a just continues.Therefore, by conduction The signal of string 12f transmission replaces between logic 1 and logic 1.

As shown in the curve chart of Fig. 3, output signal can be expressed as between the first phase 52a and the second phase 52b alternately Square wave, the most named 50, in the first phase 52a, its voltage counterlogic 0, in the second phase 52b, its voltage correspondence is patrolled Collect 1.

Alternately occurring with a frequency between the first phase 52a and the second phase 52b, this frequency depends on the anti-of phase inverter 23 Mutually and phase inverter 23 the most anti-phase between time interval.Occurring successively due to anti-phase, once electric current completes outfan 24b And during complete cycle between input 24a, it is transmitted back to the input of phase inverter 23 from outfan 24b by input signal 50 Time needed for 24a determine each anti-phase between time interval.

Therefore, the number of times sum that the frequency of ripple 50, i.e. phase 52a and 52b change in the range of given time quantum, according to Outfan 24a and conduction string be pressed against sound column between distance and change.If it is to say, conduction string 12f is pressed Under against sound column 14e, then the distance that output signal transmission is passed through is shorter than the biography when pressing conduction string 12f against sound column 14f Defeated distance.Therefore, when conduction string 12f being pressed against sound column 14e the signal frequency that formed higher than conduction string 12f is pressed to The signal frequency formed during by sound column 14f.

It is understood that transmit by conduction string 12f due to output signal and returned by conductor 22, so in output The transmission range of signal that end 24b is back between input 24a about phase inverter 23 and this string be pressed against sound column it Between the twice of distance.

CPU module 35 comprises frequency detector, and it is measured by the frequency of ripple produced by alternating signal, and can examine further Survey cause due to the change of signal transmission distance frequency change, when string 12a-12f be pressed against sound column 14a-14f change During change, signal transmission distance changes.Therefore, CPU module 35 is configured to, according to the frequency detected determine conduction string by by On any bar sound column.

Such as, if signal with the light velocity (c) transmission and phase inverter 23 chord be pressed against sound column between distance be D, then can be expressed as by square wave frequency produced by output signal alternately: F=1/ (ti+t0), it is wherein tiFor phase inverter 23 Inner time delay, and wherein t0=c/ (2d).Accordingly, because every sound column defines and the distance (d) of phase inverter 23, so energy The string 12a-12f pressing against wherein sound column 14a-14f enough detected.

It is understood that for any string 12a-12f, it is possible to conduction string is pressed against sound column perform inspection Survey.But, due to the distance different from conductor arrange each conduction string 12a-12f, the distance of this change can affect from The signal frequency that middle transmission is passed through.Therefore, as mentioned previously, fingerboard 10 can include the outer longitudinal edge along fingerboard 10 Two conductors 22 and 22a arranged and be bonded together at input 24a.Two conductors 22, the most each string 12a-of 22a 12f is arranged so that for all conduction strings, and two conductors are equal with the average distance of each conduction string 12a-12f. Therefore, two conductors 22,22a provide signal averaging, thereby promote the correct detection of frequency change, the change of this frequency be by Phase inverter 23 chord be pressed against sound column between change apart from caused.

According to different examples, it is possible to use single conductor 22, but, CPU can be configured to, by considering string and conductor Distance between 22, detects the string being pressed and thus calculates this frequency.For instance, it is possible to by pressure detector or Perform to detect the string being pressed by receiving feedback from demultiplexer 30.It is to say, only working as DeMux When device 30 is connected to the conduction string being currently pressed, just signal is transmitted back to input 24a.Therefore, demultiplexer 30 Data relevant with the string being pressed can be provided, enabling the distance between consideration string and conductor 22 for CPU In the case of, detect according to signal frequency be pressed against sound column.

It is understood that phase inverter 23, demultiplexer 30, CPU or any other electron component can be arranged on string Any position on musical instrument.Such as, these electronic components can be integrated in a module, and this module can such as pass through musical instrument On special purpose interface be connected to stringed musical instrument.In this way, wish to receive and the note played and chord as user During relevant instruction, it is possible to module is connected to stringed musical instrument.

Fig. 2 is the fingerboard 60 according to another example of the present invention and the block diagram of detecting system 70.Fingerboard 60 and the fingerboard in Fig. 1 10 is essentially identical and include many conduction string 62a-62f and be connected to a plurality of sound column 64a-of one or more conductor 68,68a 64f.Similarly, detecting system 70 is essentially identical with the detecting system 20 in Fig. 1 and includes having input 74a, outfan 74b And the phase inverter 73 of demultiplexer 80, demultiplexer 80 is configured for selecting a wherein data output lead 84a- 84f, each data output lead 84a-84f are connected in conduction string 62a to 62f.

According to this example, detecting system 70 farther includes capacitor 78, and it is connected to the input 74a of phase inverter 73. Capacitor 78 is configured to so that being charged capacitor by the signal of conductor 68,68a transmission, capacitor fills back then leads Body, thus between capacitor and conductor, form resonance.This resonance with the form of electric oscillation, this electric oscillation by capacitor 78, lead Body 68 and the interaction being pressed between the conduction string of wherein sound column 64a-64f are produced.Owing to leading Body 68,68a and the impedance of conduction string 62a-62f, electric oscillation produces decay, and then signal arrives the input 74a of phase inverter 73. When signal enters phase inverter 73, this signal is inverted.Such as, if the voltage that the signal of input 74a is counterlogic 1, Then this signal inversion is its opposite logic levels by phase inverter 73, i.e. 0, and as being explained above with reference to Fig. 1 and 3.

When the voltage of counterlogic 0 transmits by conduction string and conductor 68, produce similar vibration.This electric oscillation occurs Decay, and then the signal of logical zero arrives the input 74a of phase inverter 73, wherein this signal inversion is returned logic 1.

Therefore, as shown in the curve chart of Fig. 4, signal can be expressed as between the first phase 92a and the second phase 92b alternately Square wave, the most named 90, in the first phase 92a, its voltage counterlogic 0, in the second phase 92b, its voltage correspondence is patrolled Collect 1.First and second phases 92a and 92b all include a die-away time, and it can be expressed as T, and this die-away time makes signal wavelength Add 2T, this is because generation twice of vibrating in each wavelength, i.e. logical zero is once with logic 1 phase the most once.This causes Signal has bigger wavelength, i.e. have lower frequency so that be easy to detect small frequency change.

It is understood that according to other example, detecting system can include thus increasing wavelength for postponing signal Other electron component, the inducer such as connected or delay line.

The disclosure theme those of skill in the art will be readily appreciated that, this without departing from the spirit of the invention, according to Practical situation, can carry out multiple change, deform and revise.

Claims (30)

1., with the stringed musical instrument fingerboard of detecting system combination, described fingerboard has and is arranged on a plurality of of diverse location along its length Conduction sound column and along fingerboard length fingerboard extend above and spaced apart with sound column at least one conduction string, described detection System includes:
The conductor arranged along fingerboard length being connected with each described sound column;
Phase inverter, described phase inverter has and is connected to the first end of described conductor and the of at least conduction string described in being connected to Two ends, and the signal being configured for will transmit through this phase inverter carries out logical inversion so that when described at least one is led Electricity string when pressing against wherein described sound column, thus allows signal therefrom to transmit and passes through, described signal with a frequency two Planting between logic state the most anti-phase, described frequency depends on the distance between described phase inverter and described sound column;
Frequency detector, is used for measuring described frequency;And
Controller, for determining the described sound column position along fingerboard according to described frequency.
Combination the most according to claim 1, wherein said fingerboard includes many conduction strings.
Combination the most according to claim 2, including two conductors, in the most described many conduction strings of said two conductor Each setting so that in whole described many conduction strings, said two conductor and described many conduction strings each Average distance is identical.
Combination the most according to claim 1, wherein said conduction string is configured for vibration, thus produces musical sound.
5., according to the combination according to any one of claim 1 or 2, wherein said conduction string includes that be wound in non-conducting leads Electric material.
6. according to combination in any one of the preceding claims wherein, wherein said conduction string and the configuration of described a plurality of conduction sound column For, it is allowed to therefrom transmit low-voltage current so that do not affected by user's finger.
Combination the most according to claim 2, each in wherein said a plurality of conduction string be configured for receive from The signal of described phase inverter.
Combination the most according to claim 7, wherein said phase inverter is configured for selecting a wherein data output lead, Each DOL Data Output Line is connected to wherein in described many conduction strings.
Combination the most according to claim 2, farther includes have input and the demultiplexer of output, and described input is joined Being set to for receiving the input signal from described phase inverter, described output is configured for selecting a wherein data output Line, each DOL Data Output Line is connected to wherein in described many conduction strings.
10., according to combination in any one of the preceding claims wherein, wherein said phase inverter is configured for counterlogic 1 The anti-phase output voltage for counterlogic 0 of input voltage.
11. according to the combination according to any one of claim 2-10, farther includes a controller, and described controller is configured to Which it is being pressed against wherein sound column for detecting the root in described many conduction strings.
12. combinations according to claim 1, are wherein integrated into CPU module by described controller and described frequency detector In.
13. according to combination in any one of the preceding claims wherein, farther includes an electronic component, and described electronic component is even It is connected to described phase inverter, and is configured for described signal is postponed, thus increase the wavelength of this signal.
14. combinations according to claim 13, wherein said electronic component is capacitor.
15. 1 kinds of detecting systems, for detecting the note played on the stringed musical instrument have fingerboard, described fingerboard is arranged Having a plurality of conduction sound column and at least conduction string extended along fingerboard, described detecting system includes:
It is connected at least one conductor of each described sound column;
Phase inverter, described phase inverter has and is connected to the first end of described conductor and being connected to and conducts electricity the second end of string, described instead Phase device is configured for will transmit through the signal of this phase inverter and carries out logical inversion so that when pressing conduction string against wherein During a piece described sound column, thus allowing signal therefrom to transmit and pass through, described signal is pressed between two kinds of logic states with a frequency The most anti-phase, described frequency depends on the distance between described phase inverter and described sound column;
Frequency detector, is configured for measuring described frequency;And
Controller, is configured for determining the described sound column position along fingerboard according to described frequency, thus detects described note.
16. systems according to claim 15, wherein said phase inverter is configured for selecting a wherein data output Line, each DOL Data Output Line is configured for being connected to a conduction string of musical instrument, and described musical instrument has and extends along its fingerboard Many conduction strings.
17. detecting systems according to claim 16, farther include have input and the demultiplexer of output, described Input is configured for receiving the input signal from described phase inverter, and described output is configured for selecting a wherein data Output lead, each DOL Data Output Line is connected to wherein in described many conduction strings.
18. detecting systems according to claim 15, described first end of wherein said phase inverter is input, described Two ends are outfan.
19. detecting systems according to claim 18, wherein said phase inverter is configured for the input of counterlogic 1 Voltage inversion is the output voltage of counterlogic 0.
20. detecting systems according to claim 15, farther include a controller, and described controller is configured for inspection Which root surveyed in described many conduction strings is being pressed against wherein sound column.
21. according to the detecting system according to any one of claim 15-20, farther includes a capacitor, described capacitor It is connected to described phase inverter, and is configured in described signal forming signal resonance, be consequently for making signal delay, thus Increase signal wavelength.
22. according to the detecting system according to any one of claim 15-21, including a power supply, for producing by conduction string Signal.
23. detecting systems according to claim 15, farther include have input and the demultiplexer of output, described Input is configured for receiving the input signal from described phase inverter, and described output is configured for selecting a wherein data Output lead, each DOL Data Output Line is connected to wherein in described many conduction strings.
24. detecting systems according to claim 15, wherein said phase inverter is configured for selecting a wherein data Output lead, each DOL Data Output Line is configured for being connected to a conduction string of musical instrument, and described musical instrument has and prolongs along its fingerboard The many conduction strings stretched.
25. detecting systems according to claim 24, farther include have input and the demultiplexer of output, described Input is configured for receiving the input signal from described phase inverter, and described output is configured for selecting a wherein data Output lead, each DOL Data Output Line is connected to wherein in described many conduction strings.
26. detecting systems according to claim 15, farther include a controller, and described controller is configured for inspection Which root surveyed in described many conduction strings is being pressed against wherein sound column.
27. detecting systems according to claim 15, farther include an electronic component, and described electronic component is connected to institute State phase inverter, and be configured to described signal is postponed, thus increase the wavelength of this signal.
28. detecting systems according to claim 28, wherein said electronic component is capacitor, and described capacitor is configured to For forming signal resonance in described signal, thus make this signal delay.
The method that 29. 1 kinds of happy symbols to playing on the stringed musical instrument have fingerboard detect, described fingerboard is provided with a plurality of Conduction sound column and at least conduction string extended along fingerboard length, each conduction sound column is connected to a conductor, described method bag Include:
Producing the signal of telecommunication by conduction string, when pressing conduction string against sound column, the described signal of telecommunication can transmit by it In a sound column;
By phase inverter, described signal being carried out logical inversion, described phase inverter has the first end being connected to conductor and is connected to Second end of conduction string so that when pressing described conduction string against wherein described sound column, thus allow described signal Transmission by conductor, described signal with a frequency between two logic states the most anti-phase, described frequency depend on described instead Distance between phase device and described sound column;Described frequency is detected by frequency detector;
The described sound column position along fingerboard is calculated according to described frequency;And
The note played on musical instrument is determined according to described position.
30. 1 kinds of detecting systems, for detecting the note played on the stringed musical instrument have fingerboard, described fingerboard is arranged Having a plurality of spaced apart conduction sound column and at least conduction string extended above at described sound column, each conduction sound column is connected to One conductor, described detecting system includes:
Power supply, for producing the signal by conduction string;Phase inverter, has and is connected to the first end of conductor and the string that is connected to conduct electricity The second end;
Frequency detector, is configured for measuring described frequency;And
Controller, is configured for determining the described sound column position along fingerboard according to described frequency;
Described phase inverter is configured for will transmit through the signal of this phase inverter and carries out logical inversion so that when being pressed by conduction string Under against wherein described sound column time, thus allow described signal therefrom to transmit and pass through, described signal with a frequency at two kinds Between logic state the most anti-phase, described frequency depends on the distance between described phase inverter and described sound column.
CN201580014303.1A 2014-03-18 2015-03-09 Detecting system for stringed musical instrument CN106104671B (en)

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US4630520A (en) * 1984-11-08 1986-12-23 Carmine Bonanno Guitar controller for a music synthesizer
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US3902395A (en) * 1973-10-11 1975-09-02 William L Avant Stringed musical instrument with electronic time division multiplexing circuitry
US4336734A (en) * 1980-06-09 1982-06-29 Polson Robert D Digital high speed guitar synthesizer
EP0340734B1 (en) * 1988-05-02 1992-12-30 Casio Computer Company Limited Control apparatus for an electronic stringed instrument
CN1325103A (en) * 2000-05-19 2001-12-05 卡门音乐公司 Piezoelectric bridge acoustical pick-up for music stringed instrument

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EP2959472A1 (en) 2015-12-30
ES2637856T3 (en) 2017-10-17
AU2015232959A1 (en) 2016-09-29
WO2015140783A1 (en) 2015-09-24
CN106104671B (en) 2018-03-16

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