CN107180573B - 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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- CN107180573B CN107180573B CN201710444705.6A CN201710444705A CN107180573B CN 107180573 B CN107180573 B CN 107180573B CN 201710444705 A CN201710444705 A CN 201710444705A CN 107180573 B CN107180573 B CN 107180573B
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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 devices.Signal receiving module including signal emission module, for receiving the emitted signal of the signal emission module and the central processing module being connected with the signal receiving module；In playing procedure, signal is emitted by signal emission module, signal receiving module receive signal and central processing module processing can be convenient, reliably, it is inexpensive and which finger down key is detected and recorded when not needing and carrying out big physical alteration to piano, press which key and the key press how long；To form " fingering data flow "；Its teaching software for being used for piano playing can also be used as initial data input robot, allow robot to reappear " fingering data flow ", be used for robot piano playing.
Description
Technical field
The present invention relates to data acquisition technology fields, concretely relate to a kind of piano playing fingering data acquisition dress
It sets.
Background technique
Learn piano playing, it is important that a ring is exactly the fingering for learning expert and playing.Expert is played by the music score of Chinese operas, is pressed in an orderly manner
Under each key, audience is intoxicated in musical sound, one it is bent has played, music lingering around the beamsthe music lingers in the air, does not know its end still.Playing for expert " refers to
Method " is the crystallization for playing practical experience for a long time, and expert in playing the music score of Chinese operas when some sound, press by which finger
Which key, the key press how long, these three elements are to play " the fingering data " of this note in the music score of Chinese operas；From
The first note of the music score of Chinese operas starts, and until a final note for the music score of Chinese operas, these " fingering data " sequences form " fingering data
Stream ".
And currently, the device about acquisition piano playing fingering data occurs not yet.
Summary of the invention
For the deficiencies of the prior art, the present invention provides a kind of piano playing fingering data acquisition devices.Of the invention
Piano playing fingering data acquisition device specific technical solution is as follows:
A kind of piano playing fingering data acquisition device comprising signal emission module emits for receiving the signal
The signal receiving module of the emitted signal of module and the central processing module being connected with the signal receiving module.
According to a preferred embodiment, the signal emission module include ten sets independently of each other and frequency of oscillation respectively not
Identical signal transmission circuit；The signal transmission circuit includes by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x
Form multivibrator, resistance R2a-x and infrared light-emitting diode Ha-x；Two pole the resistance R2a-x and the infraluminescence
It is connected between the output end and GND of the multivibrator after pipe Ha-x series connection；Wherein, the resistance R1a-x and described
The value of capacitor Ca-x is different, keeps the frequency of oscillation of ten sets of signal transmission circuits different.
According to a preferred embodiment, the input terminal of the Schmidt trigger Da-x connects the resistance R1a-x
One end and the capacitor Ca-x one end；The other end of the resistance R1a-x connects the defeated of the Schmidt trigger Da-x
Outlet；The other end of the capacitor Ca-x connects Zero potential reference GND；It is applied described in one end connection of the resistance R2a-x close
The output end of special trigger Da-x, the other end of the resistance R2a-x connect the anode of the infrared light-emitting diode Ha-x, institute
State the cathode connection Zero potential reference GND of infrared light-emitting diode Ha-x.
According to a preferred embodiment, the Schmidt trigger uses integrated circuit CD40106.
According to a preferred embodiment, the signal receiving module includes infrared phototriode V1b-y；It is described red
The anode of the collector connection 5V power supply of outer phototriode V1b-y, the emitter of infrared phototriode V1b-y connect resistance
The other end of one end of R2b-y and one end of capacitor C1b-y, resistance R2b-y connects Zero potential reference GND；Resistance R3b-y's
One end connects the anode of 5V power supply, one end of the other end connection resistance R4b-y of resistance R3b-y and one end of capacitor C2b-y, electricity
Hinder the other end of the other end connection capacitor C1b-y of R4b-y and one end and the three end adjustable precision voltage references of resistance R5b-y
The other end of the reference R pin of Nb-y, resistance R5b-y connects Zero potential reference GND；One end connection 5V electricity of resistance R1b-y
The anode in source, the anode of the other end connection infrared light-emitting diode Hb-y of resistance R1b-y, infrared light-emitting diode Hb-y's is negative
Pole connects Zero potential reference GND；The anode of the collector connection 5V power supply of infrared phototriode V2b-y, it is infrared by photosensitive three
One end of the emitter connection resistance R6b-y of pole pipe V2b-y and the emitter of PNP triode V3b-y, resistance R6b-y's is another
Hold the base stage of connecting triode V3b-y and one end of resistance R7b-y, the three end adjustable precision electricity of other end connection of resistance R7b-y
Press the cathode K pin of benchmark Nb-y and the other end of capacitor C2b-y, the anode A pin of three end adjustable precision voltage reference Nb-y
Connect Zero potential reference GND；One end of the collector connection resistance R8b-y of triode V3b-y, the other end of resistance R8b-y
Connect one end of resistance R9b-y and the other end connection zero of input/output the mouth line I/O-y, resistance R9b-y of central processing module
Potential reference point GND.
According to a preferred embodiment, the signal emission module includes first circuit board and second circuit board；Its
In, multi-harmonic-oscillations are formed by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x in five sets of signal transmission circuits
Device and resistance R2a-x are set on the first circuit board；The infrared light-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, capacitor Ca-x forms multivibrator and resistance R2a-x is set on the second circuit board；The infrared light-emitting diode
Ha-x is connected by flexible wire with the second circuit board.
According to a preferred embodiment, the signal receiving module is set on the circuit board in shading box；Wherein,
The shading box includes left plate, right side plate, back side panel and cover board；The left plate and the right side plate are arranged in parallel；It is described
The rear end of left plate is connected by the back side panel with the right side plate rear end；The cover board is set to the left plate, institute
State right side plate and the back side panel upper end；Also, the front end of the shading box is lower than the rear end of the shading box, makes the shading
The side of box is trapezoidal；Mounting hole is provided on the cover board, the circuit board fastens with the mounting hole and connect.
According to a preferred embodiment, the signal emission module includes two pole of infraluminescence in photoelectric sensor
Pipe, the infrared light-emitting diode is installed below piano key, also, reflective mirror is equipped on piano key；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 a preferred embodiment, the central processing module is microcontroller or single-chip microcontroller.
Compared with prior art, a kind of piano playing fingering data acquisition device of the present invention has the following beneficial effects:
Piano playing fingering data acquisition device of the invention includes signal emission module, for receiving the signal transmitting
The signal receiving module of the emitted signal of module and the central processing module being connected with the signal receiving module；It was playing
Cheng Zhong, can be square by the processing that signal emission module emits signal, signal receiving module reception signal and central processing module
Just, reliably, low cost and detected when not needing and carrying out big physical alteration to piano and which finger down qin recorded
Key, press which key and the key press how long；To form " fingering data flow "；It is used for piano playing
Teaching software can also be used as initial data input robot, allow robot to reappear " fingering data flow ", be used for robot piano
It plays.
Detailed description of the invention
Fig. 1 is the structural block diagram of piano playing fingering data acquisition device of the present invention；
Fig. 2 is the main 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 cross-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 mounted 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 that signal emission module and signal receive mould in piano playing fingering data acquisition device embodiment 1 of the present invention
The circuit diagram of block；,
Figure 10 is the status diagram that key is not pressed in piano playing fingering data acquisition device embodiment 2 of the present invention；
Figure 11 is the status diagram that key is pressed in piano playing fingering data acquisition device embodiment 2 of the present invention.
Specific embodiment
It is described in detail with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1 to 9, a kind of piano playing fingering data acquisition device comprising signal emission module, for receiving
The signal receiving module of the emitted signal of signal emission module and the central processing module being connected with signal receiving module.
Central processing module is microcontroller or single-chip microcontroller.
Signal emission module includes ten sets of signal transmission circuits mutually indepedent and that frequency of oscillation is different；Signal transmitting
Circuit includes forming multivibrator, resistance R2a-x and infrared hair by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x
Optical diode Ha-x；Be connected to after resistance R2a-x and infrared light-emitting diode Ha-x series connection the output end of multivibrator with
Between GND；Wherein, the value of resistance R1a-x and capacitor Ca-x are different, do not make the frequencies of oscillation of ten sets of signal transmission circuits respectively not
It is identical.
One end of the input terminal connection resistance R1a-x of Schmidt trigger Da-x and one end of capacitor Ca-x；Resistance R1a-x
The other end connection Schmidt trigger Da-x output end；The other end of capacitor Ca-x connects Zero potential reference GND；Resistance
The output end of one end connection Schmidt trigger Da-x of R2a-x, the other end of resistance R2a-x connect infrared light-emitting diode
The cathode of the anode of Ha-x, infrared light-emitting diode Ha-x connects Zero potential reference GND.
Preferably, Schmidt trigger uses integrated circuit CD40106.
Signal receiving module includes infrared phototriode V1b-y；The collector of infrared phototriode V1b-y connects 5V
The anode of power supply, one end of the emitter connection resistance R2b-y of infrared phototriode V1b-y and one end of capacitor C1b-y, electricity
The other end for hindering R2b-y connects Zero potential reference GND；The anode of one end connection 5V power supply of resistance R3b-y, resistance R3b-y
Other end connection resistance R4b-y one end and capacitor C2b-y one end, the other end connection capacitor C1b-y of resistance R4b-y
The reference R pin of one end and three end adjustable precision voltage reference Nb-y of the other end and resistance R5b-y, resistance R5b-y's is another
One end connects Zero potential reference GND；The anode of one end connection 5V power supply of resistance R1b-y, the other end connection of resistance R1b-y
The cathode of the anode of infrared light-emitting diode Hb-y, infrared light-emitting diode Hb-y connects Zero potential reference GND；It is infrared photosensitive
The anode of the collector connection 5V power supply of triode V2b-y, the emitter of infrared phototriode V2b-y connect resistance R6b-y
One end and PNP triode V3b-y emitter, the base stage and resistance of the other end connecting triode V3b-y of resistance R6b-y
One end of R7b-y, the other end of resistance R7b-y connect the cathode K pin and capacitor of three end adjustable precision voltage reference Nb-y
The anode A pin of the other end of C2b-y, three end adjustable precision voltage reference Nb-y connects Zero potential reference GND；Triode
One end of the collector connection resistance R8b-y of V3b-y, one end of the other end connection resistance R9b-y of resistance R8b-y and centre
The other end for managing input/output the mouth line I/O-y, resistance R9b-y of module connects Zero potential reference GND.
Preferably, signal emission module includes first circuit board and second circuit board；Wherein, in five sets of signal transmission circuits
Multivibrator is formed by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x and resistance R2a-x is set to the first electricity
On the plate of road；Infrared light-emitting diode Ha-x is connected by flexible wire with first circuit board；Wherein, in addition five sets of signal transmittings
In circuit multivibrator is formed by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x and resistance R2a-x is set to
On second circuit board；Infrared light-emitting diode Ha-x is connected by flexible wire with second circuit board.
Preferably, signal receiving module is set on the circuit board in shading box.Wherein, shading box includes left plate, the right side
Side plate, back side panel and cover board；Left plate and right side plate are arranged in parallel；The rear end of left plate passes through back side panel and right side plate rear end phase
Connection；Cover board is set to left plate, right side plate and back side panel upper end；Also, the front end of shading box is lower than the rear end of shading box, makes
The side of shading box is trapezoidal；It is provided with mounting hole on the cover board, circuit board fastens with mounting hole and connect.
The piano playing fingering data acquisition device application method of the present embodiment is as follows:
Ten fingers of one both hands are numbered, such as the little finger of left hand are compiled as 1#, the nameless volume of left hand is 2#, a left side
It is 3# that the middle finger of hand, which is compiled, and it is 4# that the index finger 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 index finger, 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 infrared light-emitting diode, so long it is referred to as LED, this LED be 0603 patch 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, which 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
The infrared light of the flashing of LED sending different frequency on 10 fingers Yong Lai not driven.Infrared light-emitting diode issues invisible
Infrared light be this kind of LED luminescent spectrum inherent characteristic, the infrared light issued with it with some frequency scintillation is entirely different
Two concepts.Such as issue LED on 1 trumpeter's finger with the infrared light of 1.0KHz frequency scintillation, make LED on 2 trumpeter's fingers
It issues with the infrared light etc. of 1.5KHz frequency scintillation, if with the difference on the frequency stepping of 0.5KHz, 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,
First is that bottom surface, that is, be close to that face of rear table top, another is front, that is, towards player that
Face.An infrared phototriode is mounted with close to subsequent position in this shading box, it 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 issued, and photosensitive tube cannot be irradiated by light,
In off state；When some finger of player presses key, the photosensitive tube in shading box can be by the LED on finger
The light of sending irradiates.Such as 3 trumpeter's finger press key, due on 3 trumpeter's fingers LED issue infrared light with 2.0KHz
Frequency scintillation, then the photosensitive tube also can be with the frequency alternate conduction of 2.0KHz and cut-off, that is to say, that this photosensitive tube
Output signal has the information of 3 trumpeter's fingers, detects which finger down key with this.
It is specific:
As shown in Figures 2 to 4, shading box is long and narrow six face box body, is about 100 millimeters, about 11 millimeters wide；Shading box top
1a is inclined, the one end high and another end low of top surface, about 15 millimeters of high one end, about 10 millimeters of low one end.
This six faces box body lacks two faces, first is that bottom surface 1d, another is front 1b, here using that low one end of top surface as
Front.A long and narrow square hole 1e has been opened close to the position 1c below in the top surface of box body, insertion pcb board.
As shown in figure 5, each key is configured with a shading box, shading box 1 is aligned with key 3, after key 3
Side, is on same straight line with key 3, lays 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 are close to rear table top 8, 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, LED4 is pasted on finger, and flexibility is led on slim pcb board 6 is pasted onto piano playing person's the back of the hand
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 lifts, is in high bit
It sets, shading box 1 has blocked the light that the LED4 pasted on finger 9 is issued, and photosensitive tube 7 is located in shading box on pcb board 2, no
The light that can be issued by LED4 irradiates, and photosensitive tube 7 is in off state；When some finger 9 of player presses key, finger
First 9 position decline, touches 3 surface of key, the illumination that the photosensitive tube 7 in shading box 1 can be issued by the LED4 on finger
It penetrates, the oscillatory regime that photosensitive tube 7 is just on, ends.
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 frame indicated is the flashing that infrared light-emitting diode issues some frequency on some finger
The circuit diagram of infrared light, such circuit share 10 sets, and every set circuit corresponds to a finger, the subscript " a " of electronic component
Indicate the electronic component belonged in A dotted line frame, subscript " x " indicates the electronic component of which set circuit, and the value of x is 1-10, also right
Answer the number of finger.B dotted line frame indicate be infrared light reception and it is subsequent amplification shaping and send MCU handle circuit
Figure, such circuit share 88 sets, the corresponding key of every set circuit, similar with A dotted line frame, its electronic component subscript
" b " indicates the electronic component belonged in B dotted line frame, and subscript " y " indicates the electronic component of which set circuit, and the value of y is 1-88,
Also the number of key is corresponded to.
A dotted line frame circuit forms multivibrator, resistance by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x
It is connected between the output end of multivibrator and GND after R2a-x and infrared light-emitting diode Ha-x series connection." GND " is electricity
Road Zero potential reference, substantially it be 5V DC power supply cathode.Resistance R2a-x plays metering function；Adjust resistance
The frequency of oscillation of the adjustable multivibrator of value of R1a-x, capacitor Ca-x.The specific connection type of circuit is as follows in A dotted line frame: applying
The input terminal 13 of schmitt trigger Da-x connects one end of resistance R1a-x and one end of capacitor Ca-x, the other end of resistance R1a-x
The output end 14 of Schmidt trigger Da-x is connected, the other end of capacitor Ca-x connects Zero potential reference GND；Resistance R2a-x
One end connection Schmidt trigger Da-x output end 14, the other end of resistance R2a-x connects infrared light-emitting diode Ha-x
Anode, the cathode of infrared light-emitting diode Ha-x connects Zero potential reference GND.Here Schmidt trigger is using integrated electricity
There are 6 Schmidt triggers identical, independent of each other in road CD40106, a piece of CD40106.Infrared light-emitting diode Ha-x
It being cemented on each finger, other electronic components are then welded on slim pcb board 6, and slim pcb board has identical two pieces,
5 oscillators are contained in every piece of pcb board, are cemented on the back of the hand of left hand and the right hand respectively, respectively with flexible wire 5 and finger
On infrared light-emitting diode 4 be connected.
The value for adjusting resistance R1a-1, capacitor Ca-1, makes the frequency of oscillation 1.0KHz of the multivibrator of the 1st set of circuit,
It is connected with infrared light-emitting diode Ha-1 on 1# finger, then the flash frequency of infrared light-emitting diode is on 1# finger
For 1.0KHz；The frequency of oscillation that the multivibrator of the 2nd set of circuit is similarly adjusted is infrared hair on 1.5KHz, with 2# finger
Optical diode is connected, then the flash frequency of infrared light-emitting diode is 1.5KHz on 2# finger；And so on.
B dotted line frame is the reception of infrared light and subsequent amplification shaping and the circuit diagram for sending MCU to handle, two pole of infraluminescence
Pipe Ha-x and infrared phototriode V1b-y is a pair of " shine-light " device.Infrared light-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
Infrared light-emitting diode Ha-x light is lived, infrared phototriode V1b-y cannot be irradiated by light, and be in 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 issued.Infrared light-emitting diode Hb-y and infrared phototriode V2b-y is also a pair of " hair
Light-light " device, they are reflective photoelectric sensor, are mounted in piano inner cavity the appropriate position except linkage part 11
It sets, one reflective mirror 10 of appropriate location firm pasting on linkage part 11, infrared phototriode when key is not pressed
V2b-y cannot receive the illumination of infrared light-emitting diode Hb-y, and infrared phototriode V2b-y cut-off, cuts off 5V direct current at this time
Power supply, so that the I/O-y mouth line for being output to MCU is low level；When key is pressed, infrared phototriode V2b-y is logical
The illumination of infrared light-emitting diode Hb-y, the oscillation that phototriode V2b-y is just on, ends can be received by crossing reflective mirror
State can determine that y key is pressed, measurement is in oscillation by detecting that I/O-y mouth line is in oscillatory regime
The length of time of state can obtain the time that the key is pressed.
The model TL431 of electronic component Nb-y in B dotted line frame, is three end adjustable precision voltage references, which has
Cathode K, anode A and reference tri- pins of R, it is flexible in this circuit to be used as amplifier.
The specific connection type of circuit is as follows in B dotted line frame: the collector connection 5V power supply of infrared phototriode V1b-y
Anode, one end of the emitter connection resistance R2b-y of infrared phototriode V1b-y and one end of capacitor C1b-y, resistance R2b-
The other end of y connects Zero potential reference GND；The anode of one end connection 5V power supply of resistance R3b-y, resistance R3b-y's is another
One end of end connection resistance R4b-y and one end of capacitor C2b-y, the other end of the other end connection capacitor C1b-y of resistance R4b-y
Connect with the other end of one end of resistance R5b-y and the reference R pin of three end adjustable precision voltage reference Nb-y, resistance R5b-y
Meet Zero potential reference GND；The anode of one end connection 5V power supply of resistance R1b-y, the other end of resistance R1b-y connect infrared hair
The cathode of the anode of optical diode Hb-y, infrared light-emitting diode Hb-y connects Zero potential reference GND；Infrared phototriode
The anode of the collector connection 5V power supply of V2b-y, one end of the emitter connection resistance R6b-y of infrared phototriode V2b-y
With the emitter of PNP triode V3b-y, the base stage of the other end connecting triode V3b-y of resistance R6b-y and resistance R7b-y's
One end, the other end of resistance R7b-y connect three end adjustable precision voltage reference Nb-y cathode K pin and capacitor C2b-y it is another
The anode A pin of one end, three end adjustable precision voltage reference Nb-y connects Zero potential reference GND；The current collection of triode V3b-y
Pole connects one end of resistance R8b-y, one end of the other end connection resistance R9b-y of resistance R8b-y and the I/O port of MCU
The other end of line I/O-y, resistance R9b-y connect Zero potential reference GND.
B dotted line frame circuit is received the light of infrared light-emitting diode Ha-x sending, finger by infrared phototriode V1b-y
When not pressing key, infrared phototriode V1b-y is in off state, while infrared phototriode V2b-y also cannot get
The irradiation for the light that infrared light-emitting diode Hb-y is issued is in off state, is connected with infrared phototriode V2b-y emitter
The part circuit power loss connect makes the input/output mouth line I/O-y of MCU be in low level state；It is infrared when pressing key
The emitter of phototriode V1b-y exports waveform, and frequency of oscillation contains the information for pressing the finger of key, simultaneously
Infrared phototriode V2b-y is in the conductive state by the irradiation of the infrared light-emitting diode Hb-y light issued, emitter
The part circuit being connected obtains electric, and triode V3b-y is also at the oscillatory regime of conducting, cut-off, frequency of oscillation and infrared light
The frequency of oscillation of quick triode V1b-y output is identical, and then the input/output mouth line I/O-y of MCU is also also at conducting, cut-off
Oscillatory regime.By the processing of MCU, can learn be 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 the emitted signal of block and the central processing module being connected with signal receiving module；In playing procedure,
By signal emission module emit signal, signal receiving module receive signal and central processing module processing can be convenient, can
Lean on, low cost and detect and record when not needing and carrying out big physical alteration to piano which finger down key, by
Descended which key and the key press how long；To form " fingering data flow "；Its teaching for being used for piano playing
Software can also be used as initial data input robot, allow robot to reappear " fingering data flow ", be used for robot piano bullet
It plays.
Embodiment 2
As shown in Figure 1, a kind of piano playing fingering data acquisition device comprising signal emission module is believed for receiving
The signal receiving module of number the emitted signal of transmitting module and the central processing module being connected with signal receiving module.
As shown in Figure 10, Figure 11, signal emission module includes the infrared light-emitting diode in photoelectric sensor, infraluminescence
Diode is installed below piano key, also, reflective mirror is equipped on piano key；Signal receiving module includes photoelectric transfer
Infrared phototriode in sensor, infrared phototriode are installed below piano key；The output end of photoelectric sensor with
Central processing module is connected.
Preferably, central processing module is microcontroller or single-chip microcontroller.
The piano playing fingering data acquisition device application method of the present embodiment is as follows:
In piano inner cavity, each key will drive and the mechanical part of the key associated (following agreement abbreviation when pressing
For linkage part) it moves downward, when key is not pressed, which automatically resets.Appropriate position except linkage part
It sets, is mounted with a set of reflective photoelectric sensor.The luminescent device of the photoelectric sensor remains as LED, and sensitive device remains as
Photosensitive tube；One reflective mirror of appropriate location firm pasting on linkage part.Photosensitive tube cannot receive LED when key is not pressed
The irradiation of reflected light, photosensitive tube ends at this time；When key is pressed, photosensitive tube can receive the light of LED by reflective mirror reflection
According to the oscillatory regime that the photosensitive tube is just on, ends detects which key is pressed in this way.
The key of piano has 88, therefore this reflective photoelectric sensor also has 88 sets.Each key of piano from
Left-to-right number respectively be 1#, 2# ... 88#, the output signal of every set reflective photoelectric sensor pass through MCU (single-chip microcontroller)
A piece I/O mouth line inputs MCU, needs 88 I/O mouth lines, the corresponding I/O mouth line of each key altogether.On hard wires, note
When meaning guarantees that 1# key is pressed, the output signal of reflective photoelectric sensor connects I/O_1# mouth line, and 2# key is pressed
When, the output signal of reflective photoelectric sensor connects I/O_2# mouth line, and so on.
It is specific:
As shown in Figure 10, Figure 11, linkage part 11 are in piano inner cavity, it is the mechanical part with key associated.Qin
Linkage part 11 moves downward when key pressing, and when key is not pressed, which automatically resets, each key be as
This.
One reflective mirror 10 of appropriate location firm pasting on linkage part 11, it is in addition suitable also except linkage part
When position is mounted with that a set of reflective photoelectric sensor, the luminescent device of the photoelectric sensor remain as LED4, sensitive device is still
It is so photosensitive tube 7.When key is not pressed, linkage part 11 resets, and by the illumination less than LED4 on reflective mirror 10, photosensitive tube 7 is certainly
It so can't accept the reflective irradiation of reflective mirror 10, photosensitive tube 7 is in off state at this time；When key is pressed, linkage part
11 are driven and move downward, and photosensitive tube 7 can receive the illumination of LED4 by reflective mirror, and photosensitive tube is just on, ends
Oscillatory regime.Fulcrum 12 is expressed as the rotation center of linkage part 11 or the fixation bracket 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 in the process the step of,
Other than 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
It gives and finds out various solutions, and these solutions also belong to disclosure of the invention range and fall into protection of the invention
Within the scope of.It will be understood by those skilled in the art that description of the invention and its attached drawing be it is illustrative and not constitute to power
The limitation that benefit requires.Protection scope of the present invention is defined by the claims and their equivalents.
Claims (8)
1. a kind of piano playing fingering data acquisition device, which is characterized in that it includes signal emission module, described for receiving
The signal receiving module of the emitted signal of signal emission module and the central processing module being connected with the signal receiving module,
The signal emission module includes ten sets of signal transmission circuits mutually indepedent and that frequency of oscillation is different；The signal transmitting
Circuit includes forming multivibrator, resistance R2a-x and infrared hair by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x
Optical diode Ha-x；The multi-harmonic-oscillations are connected to after the resistance R2a-x and infrared light-emitting diode Ha-x series connection
Between the output end and GND of device；Wherein, the value of the resistance R1a-x and the capacitor Ca-x are different, make ten sets of signal hairs
The frequency of oscillation of transmit-receive radio road is different.
2. a kind of piano playing fingering data acquisition device according to claim 1, which is characterized in that Schmidt's touching
The input terminal of hair device Da-x connects one end of the resistance R1a-x and one end of the capacitor Ca-x；The resistance R1a-x's is another
One end connects the output end of the Schmidt trigger Da-x；The other end of the capacitor Ca-x connects Zero potential reference GND；
One end of the resistance R2a-x connects the output end of the Schmidt trigger Da-x, the other end connection of the resistance R2a-x
The cathode of the anode of the infrared light-emitting diode Ha-x, the infrared light-emitting diode Ha-x connects Zero potential reference GND.
3. a kind of piano playing fingering data acquisition device according to claim 2, which is characterized in that Schmidt's touching
It sends out device and uses integrated circuit CD40106.
4. a kind of piano playing fingering data acquisition device according to claim 3, which is characterized in that the signal receives
Module includes infrared phototriode V1b-y；The anode of the collector connection 5V power supply of the infrared phototriode V1b-y,
One end of the emitter connection resistance R2b-y of infrared phototriode V1b-y and one end of capacitor C1b-y, resistance R2b-y's is another
One end connects Zero potential reference GND；The anode of one end connection 5V power supply of resistance R3b-y, the other end connection of resistance R3b-y
One end of resistance R4b-y and one end of capacitor C2b-y, the other end and resistance of the other end connection capacitor C1b-y of resistance R4b-y
The reference R pin of one end of R5b-y and three end adjustable precision voltage reference Nb-y, zero electricity of other end connection of resistance R5b-y
Potential reference point GND；The anode of one end connection 5V power supply of resistance R1b-y, the other end of resistance R1b-y connect two pole of infraluminescence
The cathode of the anode of pipe Hb-y, infrared light-emitting diode Hb-y connects Zero potential reference GND；Infrared phototriode V2b-y
Collector connection 5V power supply anode, infrared phototriode V2b-y emitter connection resistance R6b-y one end and PNP
The emitter of triode V3b-y, the base stage of the other end connecting triode V3b-y of resistance R6b-y and one end of resistance R7b-y,
The other end of resistance R7b-y connects the cathode K pin of three end adjustable precision voltage reference Nb-y and the other end of capacitor C2b-y,
The anode A pin of three end adjustable precision voltage reference Nb-y connects Zero potential reference GND；The collector of triode V3b-y connects
One end of connecting resistance R8b-y, resistance R8b-y the other end connection resistance R9b-y one end and central processing module input/it is defeated
The other end of egress line I/O-y, resistance R9b-y connect Zero potential reference GND.
5. according to claim 1 to a kind of piano playing fingering data acquisition device described in one of 4, which is characterized in that the letter
Number transmitting module includes first circuit board and second circuit board；Wherein, being touched by Schmidt in five sets of signal transmission circuits
Hair device Da-x, resistance R1a-x, capacitor Ca-x composition multivibrator and resistance R2a-x are set on the first circuit board；Institute
It states infrared light-emitting diode Ha-x and is connected by flexible wire with the first circuit board；Wherein, other five sets of signals
In transmit circuit multivibrator is formed by Schmidt trigger Da-x, resistance R1a-x, capacitor Ca-x and resistance R2a-x is set
It is placed on the second circuit board；The infrared light-emitting diode Ha-x is connected by flexible wire with the second circuit board
It connects.
6. a kind of piano playing fingering data acquisition device according to claim 4, which is characterized in that the signal receives
Module is set on the circuit board in shading box；Wherein, the shading box includes left plate, right side plate, back side panel and cover board；Institute
It states left plate and the right side plate is arranged in parallel；The rear end of the left plate passes through the back side panel and right side plate rear end phase
Connection；The cover board is set to the left plate, the right side plate and the back side panel upper end；Also, before the shading box
End is lower than the rear end of the shading box, keeps the side of the shading box trapezoidal；Mounting hole is provided on the cover board, it is described
Circuit board fastens with the mounting hole and connect.
7. a kind of piano playing fingering data acquisition device according to claim 1, which is characterized in that the signal transmitting
Module includes the infrared light-emitting diode in photoelectric sensor, and the infrared light-emitting diode is installed below piano key, and
And reflective mirror is installed on piano key；The signal receiving module includes the infrared phototriode in photoelectric sensor,
The infrared phototriode is installed below piano key；The output end of the photoelectric sensor and the central processing module
It is connected.
8. according to claim 1 to a kind of piano playing fingering data acquisition device, feature described in one of one of 4 or 6 to 7
It is, the central processing module is microcontroller or single-chip microcontroller.
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| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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 true CN107180573B (en) | 2019-06-25 |
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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 |
| CN104157276B (en) * | 2014-08-27 | 2017-05-31 | 大连佳音科技有限公司 | The photoelectric detection system and its detection method of a kind of fingerboard action |
| 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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