CN107180573A - A kind of piano playing fingering data acquisition device - Google Patents
A kind of piano playing fingering data acquisition device Download PDFInfo
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- CN107180573A CN107180573A CN201710444705.6A CN201710444705A CN107180573A CN 107180573 A CN107180573 A CN 107180573A CN 201710444705 A CN201710444705 A CN 201710444705A CN 107180573 A CN107180573 A CN 107180573A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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Abstract
The present invention relates to a kind of piano playing fingering data acquisition device.Signal receiving module including signal emission module, for receiving signal emission module institute transmission signal and the central processing module being connected with the signal receiving module；In playing procedure, by signal emission module transmission signal, signal receiving module receive signal and central processing module processing can conveniently, reliable, low cost and detected in the case of big physical alteration need not be carried out to piano and record which finger down key, press which key and the key press how long；So as to be formed " fingering data flow "；It is used for the teaching software of piano playing, can act also as initial data input robot, allows robot to reappear " fingering data flow ", for robot piano playing.
Description
Technical field
The present invention relates to data acquisition technology field, a kind of piano playing fingering data acquisition dress is concretely related to
Put.
Background technology
Learn piano playing, it is important that a ring is exactly to learn the fingering that expert plays.Expert is played by the music score of Chinese operas, is pressed in an orderly manner
Each lower key, audience is intoxicated in musical sound, and a song has been played, and music lingering around the beamsthe music lingers in the air, does not know still it eventually.Playing for expert " refers to
Method ", is the long-term crystallization for playing practical experience, and expert which finger, presses when the sound of some in playing the music score of Chinese operas
Which key, the key press how long, these three key elements are " the fingering data " for playing the note of this in the music score of Chinese operas；From
The first note of the music score of Chinese operas starts, untill a final note for the music score of Chinese operas, these " fingering data " sequences composition " fingering data
Stream ".
And it is current, do not occur on gathering the device of piano playing fingering data also.
The content of the invention
For the deficiency of prior art, the invention provides a kind of piano playing fingering data acquisition device.The present invention's
Piano playing fingering data acquisition device concrete technical scheme is as follows：
A kind of piano playing fingering data acquisition device, it includes signal emission module, for receiving the signal transmitting
The signal receiving module of module institute transmission signal and the central processing module being connected with the signal receiving module.
According to one preferred embodiment, the signal emission module include that ten sets separate and frequency of oscillation respectively not
Identical signal transmission circuit；The signal transmission circuit is included by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x
Constitute multivibrator, resistance R2a-x and infrarede emitting diode Ha-x；Resistance R2a-x and the infraluminescence two pole
It is connected to after pipe Ha-x series connection between the output end of the multivibrator and GND；Wherein, the resistance R1a-x and described
Electric capacity Ca-x value is different, makes the frequency of oscillation of ten sets of signal transmission circuits different.
According to one preferred embodiment, the input of the Schmidt trigger Da-x connects the resistance R1a-x
One end and the electric capacity Ca-x one end；The other end of the resistance R1a-x connects the defeated of the Schmidt trigger Da-x
Go out end；The other end connection Zero potential reference GND of the electric capacity Ca-x；Apply close described in one end connection of the resistance R2a-x
Special trigger Da-x output end, the other end of the resistance R2a-x connects the positive pole of the infrarede emitting diode Ha-x, institute
State infrarede emitting diode Ha-x negative pole connection Zero potential reference GND.
According to one preferred embodiment, the Schmidt trigger uses integrated circuit CD40106.
According to one preferred embodiment, the signal receiving module includes infrared phototriode V1b-y；It is described red
Outer phototriode V1b-y colelctor electrode connects the positive pole of 5V power supplys, infrared phototriode V1b-y emitter stage connection resistance
R2b-y one end and electric capacity C1b-y one end, resistance R2b-y other end connection Zero potential reference GND；Resistance R3b-y's
One end connects the positive pole of 5V power supplys, the resistance R3b-y other end connection resistance R4b-y one end and electric capacity C2b-y one end, electricity
Hinder the R4b-y other end connection electric capacity C1b-y other end and resistance R5b-y one end and three end adjustable precision voltage references
Nb-y reference R pins, resistance R5b-y other end connection Zero potential reference GND；Resistance R1b-y one end connection 5V electricity
The positive pole in source, resistance R1b-y other end connection infrarede emitting diode Hb-y positive pole, infrarede emitting diode Hb-y's is negative
Pole connection Zero potential reference GND；Infrared phototriode V2b-y colelctor electrode connects the positive pole of 5V power supplys, infrared by photosensitive three
Pole pipe V2b-y emitter stage connection resistance R6b-y one end and PNP triode V3b-y emitter stage, resistance R6b-y's is another
Hold connecting triode V3b-y base stage and resistance R7b-y one end, the resistance R7b-y end adjustable precision electricity of other end connection three
Press benchmark Nb-y negative electrode K pins and the electric capacity C2b-y other end, three end adjustable precision voltage reference Nb-y anode A pin
Connect Zero potential reference GND；Triode V3b-y colelctor electrode connection resistance R8b-y one end, the resistance R8b-y other end
Connect resistance R9b-y one end and input/output the mouth line I/O-y, resistance R9b-y of central processing module other end connection zero
Potential reference point GND.
According to one preferred embodiment, the signal emission module includes first circuit board and second circuit board；Its
In, multi-harmonic-oscillations are constituted by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x in five sets of signal transmission circuits
Device and resistance R2a-x are arranged on the first circuit board；The infrarede emitting diode Ha-x by flexible wire with it is described
First circuit board is connected；Wherein, in addition in five sets of signal transmission circuits by Schmidt trigger Da-x, resistance R1a-
X, electric capacity Ca-x constitute multivibrator and resistance R2a-x is arranged on the second circuit board；The infrarede emitting diode
Ha-x is connected by flexible wire with the second circuit board.
According to one preferred embodiment, the signal receiving module is arranged on the circuit board in shading box；Wherein,
The shading box includes left plate, right plate, back side panel and cover plate；The left plate and the right plate be arranged in parallel；It is described
The rear end of left plate is connected by the back side panel with the right plate rear end；The cover plate is arranged at the left plate, institute
State right plate and the back side panel upper end；Also, the front end of the shading box is less than the rear end of the shading box, makes the shading
The side of box is trapezoidal；Mounting hole is provided with the cover plate, the circuit board fastens with the mounting hole and is connected.
According to one preferred embodiment, the signal emission module includes the pole of infraluminescence two in photoelectric sensor
Pipe, the infrarede emitting diode is installed on below piano key, also, is provided with piano key reflective mirror；The letter
Number receiving module includes the infrared phototriode in photoelectric sensor, and the infrared phototriode is installed under piano key
Side；The output end of the photoelectric sensor is connected with the central processing module.
According to one preferred embodiment, the central processing module is microcontroller or single-chip microcomputer.
Compared with prior art, a kind of piano playing fingering data acquisition device of the invention has the advantages that：
The piano playing fingering data acquisition device of the present invention includes signal emission module, for receiving the signal transmitting
The signal receiving module of module institute transmission signal and the central processing module being connected with the signal receiving module；Playing
Cheng Zhong, the processing for receiving signal and central processing module by signal emission module transmission signal, signal receiving module can be square
Just, reliably, low cost and detected in the case of big physical alteration need not be carried out to piano and record which finger down qin
Key, press which key and the key press how long；So as to be formed " fingering data flow "；It is used for piano playing
Teaching software, can act also as initial data input robot, allows robot to reappear " fingering data flow ", for robot piano
Play.
Brief description of the drawings
Fig. 1 is the structured flowchart of piano playing fingering data acquisition device of the present invention；
Fig. 2 is the front view of shading box in piano playing fingering data acquisition device embodiment 1 of the present invention；
Fig. 3 is the top view of shading box in piano playing fingering data acquisition device embodiment 1 of the present invention；
Fig. 4 is the sectional view of shading box in piano playing fingering data acquisition device embodiment 1 of the present invention；
Fig. 5 is that shading box is arranged on key rear table top in piano playing fingering data acquisition device embodiment 1 of the present invention
Schematic diagram；
Fig. 6 is that signal emission module is worn on piano bullet in piano playing fingering data acquisition device embodiment 1 of the present invention
The schematic diagram of the person of playing on hand；
Fig. 7 is state diagram when finger does not press key in piano playing fingering data acquisition device embodiment 1 of the present invention；
State diagram when Fig. 8 is finger down key in piano playing fingering data acquisition device embodiment 1 of the present invention；
Fig. 9 is signal emission module and signal reception mould in piano playing fingering data acquisition device embodiment 1 of the present invention
The circuit diagram of block；、
Figure 10 is the view that key is not pressed in piano playing fingering data acquisition device embodiment 2 of the present invention；
Figure 11 is the view that key is pressed in piano playing fingering data acquisition device embodiment 2 of the present invention.
Embodiment
It is described in detail below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1 to 9, a kind of piano playing fingering data acquisition device, it includes signal emission module, for receiving
The signal receiving module of signal emission module institute transmission signal and the central processing module being connected with signal receiving module.
Central processing module is microcontroller or single-chip microcomputer.
Signal emission module includes ten sets of separate and different signal transmission circuits of frequency of oscillation；Signal is launched
Circuit includes constituting multivibrator, resistance R2a-x and infrared hair by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x
Optical diode Ha-x；Be connected to after resistance R2a-x and infrarede emitting diode Ha-x series connection the output end of multivibrator with
Between GND；Wherein, resistance R1a-x and electric capacity Ca-x value are different, make the frequency of oscillation of ten sets of signal transmission circuits each not
It is identical.
Schmidt trigger Da-x input connection resistance R1a-x one end and electric capacity Ca-x one end；Resistance R1a-x
Other end connection Schmidt trigger Da-x output end；Electric capacity Ca-x other end connection Zero potential reference GND；Resistance
R2a-x one end connection Schmidt trigger Da-x output end, resistance R2a-x other end connection infrarede emitting diode
Ha-x positive pole, infrarede emitting diode Ha-x negative pole connection Zero potential reference GND.
It is preferred that, Schmidt trigger uses integrated circuit CD40106.
Signal receiving module includes infrared phototriode V1b-y；Infrared phototriode V1b-y colelctor electrode connection 5V
The positive pole of power supply, infrared phototriode V1b-y emitter stage connection resistance R2b-y one end and electric capacity C1b-y one end, electricity
Hinder R2b-y other end connection Zero potential reference GND；Resistance R3b-y one end connects the positive pole of 5V power supplys, resistance R3b-y
Other end connection resistance R4b-y one end and electric capacity C2b-y one end, resistance R4b-y other end connection electric capacity C1b-y's
The reference R pins of the other end and resistance R5b-y one end and three end adjustable precision voltage reference Nb-y, resistance R5b-y's is another
One end connection Zero potential reference GND；Resistance R1b-y one end connects the positive pole of 5V power supplys, resistance R1b-y other end connection
Infrarede emitting diode Hb-y positive pole, infrarede emitting diode Hb-y negative pole connection Zero potential reference GND；It is infrared photosensitive
Triode V2b-y colelctor electrode connects the positive pole of 5V power supplys, infrared phototriode V2b-y emitter stage connection resistance R6b-y
One end and PNP triode V3b-y emitter stage, the resistance R6b-y other end connecting triode V3b-y base stage and resistance
R7b-y one end, the resistance R7b-y other end connects three end adjustable precision voltage reference Nb-y negative electrode K pins and electric capacity
The C2b-y other end, three end adjustable precision voltage reference Nb-y anode A pin connection Zero potential reference GND；Triode
V3b-y colelctor electrode connection resistance R8b-y one end, resistance R8b-y other end connection resistance R9b-y one end and centre
Manage input/output the mouth line I/O-y, resistance R9b-y of module other end connection Zero potential reference GND.
It is preferred that, signal emission module includes first circuit board and second circuit board；Wherein, in five sets of signal transmission circuits
Multivibrator is constituted by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x and resistance R2a-x is arranged at the first electricity
On the plate of road；Infrarede emitting diode Ha-x is connected by flexible wire with first circuit board；Wherein, five sets of signal transmittings in addition
In circuit multivibrator is constituted by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x and resistance R2a-x is arranged at
On second circuit board；Infrarede emitting diode Ha-x is connected by flexible wire with second circuit board.
It is preferred that, signal receiving module is arranged on the circuit board in shading box.Wherein, shading box includes left plate, the right side
Side plate, back side panel and cover plate；Left plate and right plate be arranged in parallel；The rear end of left plate passes through back side panel and right plate rear end phase
Connection；Cover plate is arranged at left plate, right plate and back side panel upper end；Also, the front end of shading box is less than the rear end of shading box, makes
The side of shading box is trapezoidal；Mounting hole is provided with the cover board, and circuit board fastens with mounting hole and is connected.
The piano playing fingering data acquisition device application method of the present embodiment is as follows：
Ten fingers of one both hands are numbered, it is 1# such as to compile the little finger of left hand, nameless compile of left hand is 2#, left
It is 3# that the middle finger of hand, which is compiled, and it is 4# that the forefinger of left hand, which is compiled, and it is 5# that the thumb of left hand, which is compiled, and it is 6# that the thumb of the right hand, which is compiled, the right hand
It is 7# that forefinger, which is compiled, and it is 8# that the middle finger of the right hand, which is compiled, and nameless compile of the right hand is 9#, and it is 10# that the little finger of the right hand, which is compiled,.Each finger
On cement an infrarede emitting diode, so long it is referred to as LED, this LED be 0603 paster packing forms, volume very little；
One block of slim PCB (printed circuit) plate is respectively cemented on the back of the hand of left hand and the right hand, the pcb board is connected with flexible wire with LED.
There is 5 sets of pierce circuits independent of each other, the frequency of oscillation of this 5 sets of oscillators is different, can divide on every piece of slim pcb board
LED on 10 fingers Yong Lai not be driven to send the infrared light of the flicker of different frequency.Infrarede emitting diode sends invisible
Infrared light be this kind of LED luminescent spectrum inherent characteristic, the infrared light sent with it is entirely different with some frequency scintillation
Two concepts.LED on 1 trumpeter's finger is sent with the infrared light of 1.0KHz frequency scintillations, make LED on 2 trumpeter's fingers
Send with infrared light of 1.5KHz frequency scintillations etc., if with 0.5KHz difference on the frequency stepping, then：3 trumpeter's fingers are
2.0KHz, 4 trumpeter's fingers are 2.5KHz, and 5 trumpeter's fingers are 3.0KHz, and 6 trumpeter's fingers are 3.5KHz, and 7 trumpeter's fingers are
4.0KHz, 8 trumpeter's fingers are 4.5KHz, and 9 trumpeter's fingers are 5.0KHz, and 10 trumpeter's fingers are 5.5KHz.
In the hexahedron shading box that the rear table top upper cover one of each key is long and narrow, this six faces box body lacks two faces,
One is bottom surface, that is, is close to that face of rear table top, it is another be before, be towards player that
Face.An infrared phototriode is mounted with close to position below in this shading box, can be its abbreviation photosensitive tube.Key
When not pressing, finger lifts higher, and shading box has blocked the light that LED on finger is sent, and photosensitive tube can not be irradiated by light,
In cut-off state；When some finger of player presses key, the photosensitive tube in shading box can be by the LED on finger
The light irradiation sent.For example 3 trumpeter's fingers press key, and the infrared light sent due to the LED on 3 trumpeter's fingers is with 2.0KHz
Frequency scintillation, then the photosensitive tube also can be with 2.0KHz frequency alternate conduction and cut-off, that is to say, that this photosensitive tube
Output signal carries the information of 3 trumpeter's fingers, and which finger down key is detected with this.
Specifically：
As shown in Figures 2 to 4, shading box is long and narrow six face box body, is about 100 millimeters, wide about 11 millimeters；Shading box top
1a is inclined, and the higher end of top surface is low, about 15 millimeters of high one end, about 10 millimeters of low one end.
This six faces box body lacks two faces, and one is bottom surface 1d, and another is above 1b, here using that low one end of top surface as
Above.A long and narrow square hole 1e has been opened in the close 1c positions below of the top surface of box body, embedded pcb board.
As shown in figure 5, each key is configured with a shading box, shading box 1 aligns with key 3, after key 3
Side, is on same straight line with key 3, keeps flat and firm pasting is on key rear table top 8.1b faces bullet before shading box
The person of playing, shading box bottom surface 1d is close to rear table top 8, and these shading boxes are transversely arranged in a row.Pcb board 2 is embedded in shading box
In the long and narrow square hole 1e of shading box 1.
As shown in fig. 6, on slim pcb board 6 is pasted onto piano playing person's the back of the hand, LED4 is pasted onto on finger, and flexibility is led
Line 5 connects the circuit between LED4 and slim pcb board 6.
As shown in Figure 7, Figure 8, when certain finger 9 of player does not press key 3, finger 9, which is lifted, is in high bit
Put, shading box 1 has blocked the light that the LED4 pasted on finger 9 is sent, photosensitive tube 7 is located in shading box on pcb board 2, no
The light irradiation that can be sent by LED4, photosensitive tube 7 is in cut-off state；When some finger 9 of player presses key, finger
First 9 position declines, and touches the illumination that the photosensitive tube 7 in the surface of key 3, shading box 1 can be sent by the LED4 on finger
Penetrate, the oscillatory regime that photosensitive tube 7 is just on, ended.
In fig .9, the element serial number " Ha-x " of " LED4 " here, " the element serial number " V1b-y " of photosensitive tube 7 ".
In fig .9, what A dotted line frames were represented is the flicker that infrarede emitting diode sends some frequency on some finger
The circuit diagram of infrared light, such circuit has 10 sets, often covers circuit one finger of correspondence, the subscript " a " of its electronic component
The electronic component belonged in A dotted line frames is represented, subscript " x " represents the electronic component of which set circuit, and x value is 1-10, also right
Answer the numbering of finger.What B dotted line frames were represented is the reception and follow-up amplification shaping of infrared light and send the MCU circuits handled
Figure, such circuit has 88 sets, often covers circuit one key of correspondence, similar with A dotted line frames, its electronic component subscript
" b " represents the electronic component belonged in B dotted line frames, and subscript " y " represents the electronic component of which set circuit, and y value is 1-88,
Also the numbering of key is corresponded to.
A dotted line frames circuit constitutes multivibrator, resistance by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x
It is connected to after R2a-x and infrarede emitting diode Ha-x series connection between the output end of multivibrator and GND." GND " is electricity
Road Zero potential reference, substantially it is the negative pole of 5V DC power supplies.Resistance R2a-x plays metering function；Adjust resistance
R1a-x, electric capacity Ca-x value can adjust the frequency of oscillation of multivibrator.The specific connected mode of circuit is as follows in A dotted line frames：Apply
The schmitt trigger Da-x connection resistance of input 13 R1a-x one end and electric capacity Ca-x one end, the resistance R1a-x other end
Connect Schmidt trigger Da-x output end 14, electric capacity Ca-x other end connection Zero potential reference GND；Resistance R2a-x
One end connection Schmidt trigger Da-x output end 14, resistance R2a-x other end connection infrarede emitting diode Ha-x
Positive pole, infrarede emitting diode Ha-x negative pole connection Zero potential reference GND.Here Schmidt trigger uses integrated electricity
There are 6 identicals, Schmidt trigger independent of each other in road CD40106, a piece of CD40106.Infrarede emitting diode Ha-x
It is cemented on each finger, other electronic components are then welded on slim pcb board 6, slim pcb board has two pieces of identical,
Contained in every piece of pcb board on 5 oscillators, the back of the hand that left hand and the right hand are cemented in respectively, respectively with flexible wire 5 and finger
On infrarede emitting diode 4 be connected.
Resistance R1a-1, electric capacity Ca-1 value are adjusted, the frequency of oscillation for making the multivibrator of the 1st set of circuit is 1.0KHz,
It is connected with infrarede emitting diode Ha-1 on 1# fingers, then the flash frequency of infrarede emitting diode is on 1# fingers
For 1.0KHz；The frequency of oscillation that similarly can adjust the multivibrator of the 2nd set of circuit is infrared hair on 1.5KHz, with 2# fingers
Optical diode is connected, then the flash frequency of infrarede emitting diode is 1.5KHz on 2# fingers；And so on.
B dotted line frames are the reception and follow-up amplification shaping of infrared light and send the MCU circuit diagrams handled, the pole of infraluminescence two
Pipe Ha-x and infrared phototriode V1b-y is a pair of " luminous-light " devices.Infrarede emitting diode Ha-x is to be pasted onto hand
On finger, infrared phototriode V1b-y is then located in shading box on pcb board 2, and when finger does not press key, shading box 1 is kept off
Infrarede emitting diode Ha-x light is lived, infrared phototriode V1b-y can not be irradiated by light, in cut-off state；When
When some finger of player presses key, the infrared phototriode V1b-y in shading box can be by infrared on finger
The light irradiation that light emitting diode Ha-x is sent.Infrarede emitting diode Hb-y and infrared phototriode V2b-y is also a pair of " hairs
Light-light " device, they are reflective photoelectric sensor, the appropriate position outside linkage part 11 in piano inner chamber
Put, one reflective mirror 10 of appropriate location firm pasting on linkage part 11, infrared phototriode when key is not pressed
V2b-y can not receive infrarede emitting diode Hb-y illumination, and now infrared phototriode V2b-y cut-offs, cut off 5V direct currents
Power supply so that the I/O-y mouth lines for being output to MCU are low level；When key is pressed, infrared phototriode V2b-y leads to
Infrarede emitting diode Hb-y illumination, the vibration that phototriode V2b-y is just on, ended can be received by crossing reflective mirror
State, is in oscillatory regime by detecting I/O-y mouth lines, just can determine that y keys are pressed, measurement is in oscillation
The time length of state just can obtain the time that the key is pressed.
The model TL431 of electronic component Nb-y in B dotted line frames, is three end adjustable precision voltage references, and the element has
Negative electrode K, anode A and reference tri- pins of R, accommodation is used as amplifier in this circuit.
The specific connected mode of circuit is as follows in B dotted line frames：Infrared phototriode V1b-y colelctor electrode connection 5V power supplys
Positive pole, infrared phototriode V1b-y emitter stage connection resistance R2b-y one end and electric capacity C1b-y one end, resistance R2b-
Y other end connection Zero potential reference GND；Resistance R3b-y one end connects the positive pole of 5V power supplys, and resistance R3b-y's is another
End connection resistance R4b-y one end and electric capacity C2b-y one end, the resistance R4b-y other end connection electric capacity C1b-y other end
One end and three end adjustable precision voltage reference Nb-y reference R pins with resistance R5b-y, the resistance R5b-y other end connect
Connecting to neutral potential reference point GND；Resistance R1b-y one end connects the positive pole of 5V power supplys, and the resistance R1b-y other end connects infrared hair
Optical diode Hb-y positive pole, infrarede emitting diode Hb-y negative pole connection Zero potential reference GND；Infrared phototriode
V2b-y colelctor electrode connects the positive pole of 5V power supplys, infrared phototriode V2b-y emitter stage connection resistance R6b-y one end
With PNP triode V3b-y emitter stage, resistance R6b-y other end connecting triode V3b-y base stage and resistance R7b-y's
One end, the resistance R7b-y other end connect three end adjustable precision voltage reference Nb-y negative electrode K pins and electric capacity C2b-y it is another
One end, three end adjustable precision voltage reference Nb-y anode A pin connection Zero potential reference GND；Triode V3b-y current collection
Pole connection resistance R8b-y one end, resistance R8b-y other end connection resistance R9b-y one end and MCU I/O port
Line I/O-y, resistance R9b-y other end connection Zero potential reference GND.
B dotted line frames circuit receives the light that infrarede emitting diode Ha-x is sent, finger by infrared phototriode V1b-y
When not pressing key, infrared phototriode V1b-y is in cut-off state, while infrared phototriode V2b-y also cannot
The irradiation for the light that infrarede emitting diode Hb-y is sent is in cut-off state, is connected with infrared phototriode V2b-y emitter stages
The part circuit dead electricity connect, makes MCU input/output mouth line I/O-y be in low level state；It is infrared when pressing key
Phototriode V1b-y emitter stage output waveform, its frequency of oscillation contains the information for the finger for pressing key, simultaneously
Infrared phototriode V2b-y is in the conduction state by the irradiation of the infrarede emitting diode Hb-y light sent, its emitter stage
The part circuit being connected obtains electric, and triode V3b-y is also at conducting, the oscillatory regime of cut-off, frequency of oscillation and infrared light
The frequency of oscillation of quick triode V1b-y outputs is identical, and then MCU input/output mouth line I/O-y is also also at conducting, cut-off
Oscillatory regime.By MCU processing, just can learn it is which finger down key, press be which key and by
The time of lower key.
The piano playing fingering data acquisition device of the present embodiment includes signal emission module, for receiving signal transmitting mould
The signal receiving module of block institute transmission signal and the central processing module being connected with signal receiving module；In playing procedure,
By signal emission module transmission signal, signal receiving module receive signal and central processing module processing can conveniently, can
Lean on, low cost and detected in the case of big physical alteration need not be carried out to piano and record which finger down key, by
Descended which key and the key press how long；So as to be formed " fingering data flow "；It is used for the teaching of piano playing
Software, can act also as initial data input robot, allows robot to reappear " fingering data flow ", for robot piano bullet
Play.
Embodiment 2
As shown in figure 1, a kind of piano playing fingering data acquisition device, it includes signal emission module, for receiving letter
The signal receiving module of number transmitter module institute transmission signal and the central processing module being connected with signal receiving module.
As shown in Figure 10, Figure 11, signal emission module includes the infrarede emitting diode in photoelectric sensor, infraluminescence
Diode is installed on below piano key, also, is provided with piano key reflective mirror；Signal receiving module includes photoelectric transfer
Infrared phototriode in sensor, infrared phototriode is installed on below piano key；The output end of photoelectric sensor with
Central processing module is connected.
It is preferred that, central processing module is microcontroller or single-chip microcomputer.
The piano playing fingering data acquisition device application method of the present embodiment is as follows：
In piano inner chamber, mechanical part (the following agreement abbreviation with the key associated can be driven when each key is pressed
For linkage part) move downward, when key is not pressed, the linkage part automatically resets.Appropriate position outside linkage part
Put, be mounted with a set of reflective photoelectric sensor.The luminescent device of the photoelectric sensor remains as LED, and sensitive device is remained as
Photosensitive tube；One reflective mirror of appropriate location firm pasting on linkage part.Photosensitive tube can not receive LED when key is not pressed
The irradiation of reflected light, now photosensitive tube cut-off；When key is pressed, photosensitive tube can receive LED light by reflective mirror reflection
According to the oscillatory regime that the photosensitive tube is just on, ended so detects which key is pressed.
The key of piano has 88, therefore this reflective photoelectric sensor also has 88 sets.Each key of piano from
It is left-to-right respectively numbering be 1#, 2# ... 88#, often cover reflective photoelectric sensor output signal pass through MCU's (single-chip microcomputer)
A piece I/O mouth line inputs MCU, and 88 I/O mouth lines, a piece I/O mouth line of each key correspondence are needed altogether.On hard wires, note
When meaning ensures that 1# keys are pressed, the output signal connection I/O_1# mouth lines of its reflective photoelectric sensor, 2# keys are pressed
When, the output signal connection I/O_2# mouth lines of its reflective photoelectric sensor, and so on.
Specifically：
As shown in Figure 10, Figure 11, linkage part 11, in piano inner chamber, it is the mechanical part with key associated.Qin
Linkage part 11 is moved downward when key is pressed, when key is not pressed, and the linkage part 11 automatically resets, each key be as
This.
One reflective mirror 10 of appropriate location firm pasting on linkage part 11, it is suitable also outside linkage part in addition
When position is mounted with a set of reflective photoelectric sensor, the luminescent device of the photoelectric sensor remains as LED4, and sensitive device is still
It is so photosensitive tube 7.When key is not pressed, linkage part 11 resets, by the illumination less than LED4 on reflective mirror 10, and photosensitive tube 7 is certainly
The reflective irradiation of reflective mirror 10 is so can't accept, now photosensitive tube 7 is in cut-off state；When key is pressed, linkage part
11 are driven and move downward, and photosensitive tube 7 can receive LED4 illumination by reflective mirror, and photosensitive tube is just on, ended
Oscillatory regime.Fulcrum 12 is expressed as the pivot of linkage part 11 or the fixed support of photoelectric sensor.In fig .9, this
In " LED4 " element serial number " Hb-y ", " the element serial number " V2b-y " of photosensitive tube 7 ".
It should be noted that all features disclosed in this specification, or disclosed all methods or during the step of,
In addition to mutually exclusive feature and/or step, it can combine in any way.
In addition, above-mentioned specific embodiment is exemplary, those skilled in the art can opening in the disclosure of invention
Give and find out various solutions, and these solutions also belong to disclosure of the invention scope and fall into the protection of the present invention
Within the scope of.It will be understood by those skilled in the art that description of the invention and its accompanying drawing be it is illustrative and not constitute to power
The limitation that profit is required.Protection scope of the present invention is limited by claim and its equivalent.
Claims (9)
1. a kind of piano playing fingering data acquisition device, it is characterised in that it includes signal emission module, described for receiving
The signal receiving module of signal emission module institute transmission signal and the central processing module being connected with the signal receiving module.
2. a kind of piano playing fingering data acquisition device according to claim 1, it is characterised in that the signal transmitting
Module includes ten sets of separate and different signal transmission circuits of frequency of oscillation；
The signal transmission circuit include by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x constitute multivibrator,
Resistance R2a-x and infrarede emitting diode Ha-x；Connect after the resistance R2a-x and infrarede emitting diode Ha-x series connection
It is connected between the output end of the multivibrator and GND；
Wherein, the resistance R1a-x and the electric capacity Ca-x value are different, make the frequency of oscillation of ten sets of signal transmission circuits
It is different.
3. a kind of piano playing fingering data acquisition device according to claim 2, it is characterised in that the Schmidt touches
The input for sending out device Da-x connects one end of the resistance R1a-x and one end of the electric capacity Ca-x；
The other end of the resistance R1a-x connects the output end of the Schmidt trigger Da-x；
The other end connection Zero potential reference GND of the electric capacity Ca-x；
One end of the resistance R2a-x connects the output end of the Schmidt trigger Da-x, the other end of the resistance R2a-x
Connect the positive pole of the infrarede emitting diode Ha-x, the negative pole connection Zero potential reference of the infrarede emitting diode Ha-x
GND。
4. a kind of piano playing fingering data acquisition device according to claim 3, it is characterised in that the Schmidt touches
Send out device and use integrated circuit CD40106.
5. a kind of piano playing fingering data acquisition device according to claim 4, it is characterised in that the signal is received
Module includes infrared phototriode V1b-y；
The colelctor electrode of the infrared phototriode V1b-y connects the positive pole of 5V power supplys, infrared phototriode V1b-y transmitting
Pole connection resistance R2b-y one end and electric capacity C1b-y one end, resistance R2b-y other end connection Zero potential reference GND；
Resistance R3b-y one end connects the positive pole of 5V power supplys, resistance R3b-y other end connection resistance R4b-y one end and electricity
Hold C2b-y one end, the resistance R4b-y other end connection electric capacity C1b-y other end and resistance R5b-y one end and three ends
Adjustable precision voltage reference Nb-y reference R pins, resistance R5b-y other end connection Zero potential reference GND；
Resistance R1b-y one end connects the positive pole of 5V power supplys, resistance R1b-y other end connection infrarede emitting diode Hb-y's
Positive pole, infrarede emitting diode Hb-y negative pole connection Zero potential reference GND；
Infrared phototriode V2b-y colelctor electrode connects the positive pole of 5V power supplys, and infrared phototriode V2b-y emitter stage connects
Connecting resistance R6b-y one end and PNP triode V3b-y emitter stage, resistance R6b-y other end connecting triode V3b-y's
One end of base stage and resistance R7b-y, resistance R7b-y three end adjustable precision voltage reference Nb-y of other end connection negative electrode K draws
The other end of pin and electric capacity C2b-y, three end adjustable precision voltage reference Nb-y anode A pin connection Zero potential reference GND；
Triode V3b-y colelctor electrode connection resistance R8b-y one end, the one of resistance R8b-y other end connection resistance R9b-y
Input/output the mouth line I/O-y, resistance R9b-y of end and central processing module other end connection Zero potential reference GND.
6. according to a kind of one of claim 2 to 5 piano playing fingering data acquisition device, it is characterised in that the letter
Number transmitter module includes first circuit board and second circuit board；
Wherein, constitute many by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x in five sets of signal transmission circuits
Harmonic oscillator and resistance R2a-x are arranged on the first circuit board；The infrarede emitting diode Ha-x passes through flexible wire
It is connected with the first circuit board；
Wherein, in addition in five sets of signal transmission circuits by Schmidt trigger Da-x, resistance R1a-x, electric capacity Ca-x groups
It is arranged at into multivibrator and resistance R2a-x on the second circuit board；The infrarede emitting diode Ha-x passes through flexibility
Wire is connected with the second circuit board.
7. a kind of piano playing fingering data acquisition device according to claim 5, it is characterised in that the signal is received
Module is arranged on the circuit board in shading box；
Wherein, the shading box includes left plate, right plate, back side panel and cover plate；The left plate is parallel with the right plate
Set；The rear end of the left plate is connected by the back side panel with the right plate rear end；The cover plate is arranged at described
Left plate, the right plate and the back side panel upper end；Also, the front end of the shading box is less than the rear end of the shading box,
Make the side of the shading box trapezoidal；
Mounting hole is provided with the cover plate, the circuit board fastens with the mounting hole and is connected.
8. a kind of piano playing fingering data acquisition device according to claim 1, it is characterised in that the signal transmitting
Module includes the infrarede emitting diode in photoelectric sensor, and the infrarede emitting diode is installed on below piano key, and
And, reflective mirror is installed on piano key；
The signal receiving module includes the infrared phototriode in photoelectric sensor, and the infrared phototriode is installed on
Below piano key；
The output end of the photoelectric sensor is connected with the central processing module.
9. a kind of piano playing fingering data acquisition device according to one of one of claim 1 to 5 or 7 to 8, its feature
It is, the central processing module is microcontroller or single-chip microcomputer.
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| CN201710444705.6A CN107180573B (en) | 2017-06-13 | 2017-06-13 | A kind of piano playing fingering data acquisition device |
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| CN201710444705.6A CN107180573B (en) | 2017-06-13 | 2017-06-13 | A kind of piano playing fingering data acquisition device |
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| CN107180573B CN107180573B (en) | 2019-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110956871A (en) * | 2019-11-26 | 2020-04-03 | 郑州师范学院 | Self-service piano playing exercise device |
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| GB403204A (en) * | 1932-10-07 | 1933-12-21 | John Halmagyi | Improvements in or relating to electrical musical instruments |
| CN103778905A (en) * | 2013-03-07 | 2014-05-07 | 福州飞翔音乐电子科技有限公司 | Mechanical piano playing information acquisition device |
| CN104157276A (en) * | 2014-08-27 | 2014-11-19 | 大连佳音科技有限公司 | Photoelectric detection device and detection method for motions of piano keyboard |
| CN204270311U (en) * | 2014-11-18 | 2015-04-15 | 华中科技大学 | A kind of hand-hold electronic equipments based on radio-frequency (RF) identification |
| CN205302927U (en) * | 2016-01-19 | 2016-06-08 | 陈文斌 | Piano keyboard data signal output system |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB403204A (en) * | 1932-10-07 | 1933-12-21 | John Halmagyi | Improvements in or relating to electrical musical instruments |
| CN103778905A (en) * | 2013-03-07 | 2014-05-07 | 福州飞翔音乐电子科技有限公司 | Mechanical piano playing information acquisition device |
| CN104157276A (en) * | 2014-08-27 | 2014-11-19 | 大连佳音科技有限公司 | Photoelectric detection device and detection method for motions of piano keyboard |
| CN204270311U (en) * | 2014-11-18 | 2015-04-15 | 华中科技大学 | A kind of hand-hold electronic equipments based on radio-frequency (RF) identification |
| CN205302927U (en) * | 2016-01-19 | 2016-06-08 | 陈文斌 | Piano keyboard data signal output system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110956871A (en) * | 2019-11-26 | 2020-04-03 | 郑州师范学院 | Self-service piano playing exercise device |
| CN110956871B (en) * | 2019-11-26 | 2021-08-20 | 郑州师范学院 | Self-service piano playing exercise device |
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| Publication number | Publication date |
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| CN107180573B (en) | 2019-06-25 |
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