CN103778905A - Mechanical piano playing information acquisition device - Google Patents
Mechanical piano playing information acquisition device Download PDFInfo
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- CN103778905A CN103778905A CN201310072529.XA CN201310072529A CN103778905A CN 103778905 A CN103778905 A CN 103778905A CN 201310072529 A CN201310072529 A CN 201310072529A CN 103778905 A CN103778905 A CN 103778905A
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- key
- photoelectric reflection
- electrical signal
- microprocessor
- signal intensity
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/32—Constructional details
- G10H1/34—Switch arrangements, e.g. keyboards or mechanical switches specially adapted for electrophonic musical instruments
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
- G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
- G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
- G10H1/055—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements
- G10H1/0553—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements using optical or light-responsive means
Abstract
The invention discloses a mechanical piano playing information acquisition device. The mechanical piano playing information acquisition device comprises photoelectric reflection switches and microprocessors, wherein the photoelectric reflection switch comprises an emission head and a reception head, the photoelectric reflection switch realizes converting a distance between the photoelectric reflection switch and an outer surface of a key or an outer surface of a key linkage part into an electrical signal, the microprocessors are connected with the photoelectric reflection switches, each microprocessor is preset with a threshold value, the microprocessor detects electrical signal intensity change of the photoelectric reflection switches and calculates a difference value between electrical signal intensity after change and electrical signal intensity under an non-pressed state, and the microprocessor logically determines the key to change from an upspring state to a pressed state when the difference value is equal to or greater than the threshold value. The mechanical piano playing information acquisition device can accurately convert mechanical motions in a mechanical piano playing process into electrical signals while a mechanical piano in the prior art is not reconstructed, and thereby playing information acquisition of a traditional mechanical piano is realized.
Description
Technical field
The present invention relates to mechanical piano study aid and method, relate in particular to a kind of mechanical piano and play the harvester of information and use this harvester to carry out mechanical piano the method for playing information acquisition.
Background technology
Key in herein background technology and describe paragraph.Piano is a kind of keyboard instrument being derived from western classicality music, is made up of 88 keys and metallic cord soundboard, and generally for performances such as solo, ensemble, accompaniments, composition and rehearsal music are very convenient.Player, by pressing the key on lower keyboard, affects piano the inside wrapping the gavel of carpet, then knocks steel wire string and sounds.Piano is called as the king of musical instrument.This is not only because its volume maximum, inner structure are the most complicated, main or due to its good comprehensive performance and widely purposes be all that other any musical instruments cannot be intended by comparison.
Current piano kind is divided into pianotron and mechanical piano substantially, and pianotron is electrophonic musical instrument, and mechanical piano is pure mechanical-physical sounding, string vibrations, and qin boominess resonance produces.Although at present pianotron is relatively subject to user's favor with its practicality and superiority of effectiveness, mechanical piano is with its real voice effect and perfectly to play feel be that pianotron cannot replace.While particularly accepting the piano study of system, mechanical piano remains difficult point and the emphasis of study.
There is a difficult point in traditional mechanical piano study, the playing information that is exactly mechanical piano cannot objectively gather, conventionally all need teacher's continual listening to aside, judge whether bullet mistake of student by the sound sending, then point out faults timely and and guide corrigendum.This has just brought several problems, and the first, counselor can not accompany student at one's side always, and student practises alone in the process of mechanical piano, and its mistake of playing just unmanned discovery is in time pointed out.The second, counselor's memory is limited, possibly cannot remember student play the action of playing of each mistake in process, may miss many unconspicuous mistakes, be disadvantageous to the study of the sturdy system of student.
If in time find to play the problem occurring in process, will be to playing information, the error correction of then again the information of collection and correct information being compared, mechanical piano does not have the output of electric signal, therefore cannot gather the information of playing.This just needs a kind of device and method on the basis of not destructive mechanical piano structure, can gather accurately the mechanical piano information of playing.
Summary of the invention
The invention provides a kind of device of accurately collection machinery piano playing information and adopt this device mechanical piano to be played to the method for information.
For achieving the above object, the harvester that mechanical piano of the present invention is played information comprises photoelectric reflection switch and microprocessor, photoelectric reflection switch comprises emitting head and Receiver, the emitting head of a described photoelectric reflection switch and Receiver are towards the outside surface of a key or the outside surface of a key linkage part, the distance between the outside surface of the outside surface of this photoelectric reflection switch and a key or a key linkage part is converted into electric signal by photoelectric reflection switch, this electrical signal intensity becomes positive correlation or negative correlation with distance, microprocessor connects photoelectric reflection switch, in microprocessor, be preset with threshold value, for each key, electrical signal intensity the logic of this key of microprocessor records photoelectric reflection switch in the time of down state not judge that this key is in the state of upspringing, the electrical signal intensity that microprocessor detects photoelectric reflection switch changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, microprocessor sends the digital signal of this key of reflection in down state or the state of upspringing.
Adopt above design, photoelectric reflection switch can be converted to the motion of mechanical piano key the variation of electrical signal intensity, such as being the variation of magnitude of voltage.For each key, the electrical signal intensity of this key of microprocessor records photoelectric reflection switch in the time of down state not the logic of acquiescence judge that this key is in the state of upspringing; The electrical signal intensity that microprocessor detects photoelectric reflection switch changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, this difference can reflect key be pressed after from the move distance of initial position.In the time that the move distance of key does not reach certain numerical value, can think that this key still keeps the state of upspringing; In the time that the move distance of key meets or exceeds certain numerical value, can think that this key is pressed; In the time that the move distance of key is less than certain numerical value again, can think that this key is returned to the state of upspringing; Therefore the threshold value being preset with in microprocessor is to reflect this key at down state or the distance changing between state of upspringing.The absolute difference and the threshold value that calculate electrical signal intensity variation are compared, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, and microprocessor sends the digital signal of this key in down state; When absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, and microprocessor sends the digital signal of this key in the state of upspringing.Thereby realize the process that mechanical piano is played to information digitalization.Meanwhile, can be according to the mechanical piano of different model and the default different threshold value of the concrete setting position of photoelectric reflection switch, to adapt to the piano of different model.Also can be the different multiple different threshold values of key definition simultaneously.The difference of change in electric due to what calculate, rather than One-Point-Value, even if it is aging that photoelectric reflection switch occurs, cause the electrical signal intensity detecting to change, the difference calculating still can not change, and therefore still can not make a mistake by the upspring accuracy of state and down state logic judgement of difference.
The harvester that mechanical piano of the present invention is played information also comprises back up pad, back up pad is dismountable to be fixed in casing of piano or piano case, photoelectric reflection switch is fixed in back up pad, and after back up pad is fixing, the emitting head of each photoelectric reflection switch and Receiver are towards the outside surface of each key or the outside surface of key linkage part.Whole photoelectric reflection switches is arranged in back up pad, when use, only need directly back up pad to be fixed in casing of piano or piano case, can realize like this that harvester is independent of the fast assembling-disassembling of mechanical piano and the photoelectric reflection position of the switch is stable in use.
The top that is fixed on key linkage part in qin case of the dismountable level of back up pad of the present invention, photoelectric reflection switch emitting head and Receiver are towards the upper surface of key linkage part.When use, open qin case, put into back up pad, make with photoelectric reflection switch one facing to key linkage part, and each photoelectric reflection switch emitting head and the respectively corresponding key linkage part of Receiver.Suppose that electric signal is that magnitude of voltage illustrates, when user has set up after equipment, in the time not pressing key, for each key, the magnitude of voltage (being defined as initial voltage value) of microprocessor records photoelectric reflection switch now logic judge that this key is in the state of upspringing; When user presses key, key linkage part moves upward and relies on photoelectric reflection switch, along with reducing of distance between key linkage part and photoelectric reflection switch, the magnitude of voltage that photoelectric reflection switch sends to microprocessor increases, microprocessor calculates the now difference between magnitude of voltage and initial voltage value, in the time that the absolute value of difference is less than threshold value, judge that this key is still in the state of upspringing, in the time that the absolute value of difference is equal to or greater than threshold value, judge that this key is down state by the state-transition of upspringing.When user decontrols key, key is upspring, and key linkage part moves downward away from photoelectric reflection switch, and the magnitude of voltage that photoelectric reflection switch sends to microprocessor reduces, in the time that difference is less than threshold value again, judge that this key changes by down state the state of upspringing into.
The quantity of photoelectric reflection switch of the present invention is consistent with the quantity of piano key, the corresponding outside surface of a key of each photoelectric reflection switch or the outside surface of a key linkage part.For traditional mechanical piano, generally by 88 keys, can adopt 88 photoelectric reflection switches to aim at respectively each key and gather.Can play information acquisition to whole keys like this.
Microprocessor of the present invention is single-chip microcomputer.
Microprocessor of the present invention externally sends the digital signal of this key of reflection in down state or the state of upspringing in the mode of serial ports.Can directly be connected with the USB interface of panel computer or desktop computer, analyze for related software.
Mechanical piano is played the acquisition method of information, comprises the steps step 1: determine the piano key number that needs collection, step 2: the photoelectric reflection switch equating with the piano key number of needs collection is aimed at respectively to the outside surface of each key or the outside surface of key linkage part, step 3: the distance between this photoelectric reflection switch and its key outside surface of aiming at or key linkage part outside surface is converted into electric signal by each photoelectric reflection switch, according to photoelectric reflection switch installation site, this electrical signal intensity becomes positive correlation or negative correlation with distance, step 4: key is in the time of down state not, and electric signal is sent to microprocessor by each photoelectric reflection switch, and the electrical signal intensity of each photoelectric reflection switch of microprocessor records logic judge that key is in the state of upspringing, step 5: be preset with threshold value in microprocessor, the electrical signal intensity that microprocessor detects photoelectric reflection switch for each key changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, step 6: microprocessor sends the digital signal of each key of reflection in down state or the state of upspringing.
Photoelectric reflection switch described in the inventive method step 2 is arranged in back up pad, be fixed in piano case dismountable the back up pad with photoelectric reflection switch, the photoelectric reflection switch equating with the piano key number of needs collection is aimed at respectively the outside surface of each key or the outside surface of key linkage part.
The top that is fixed on key linkage part in qin case of the dismountable level of back up pad described in the inventive method, photoelectric reflection switch emitting head and Receiver are towards the upper surface of key linkage part.
Microprocessor described in the inventive method is single-chip microcomputer.
Compared with prior art, mechanical piano of the present invention is played the harvester of information and acquisition method on the basis of existing machinery piano not being transformed, only need simple device of dismountable use, the mechanical motion that just mechanical piano can be played in process is transformed into electric signal accurately, thereby realize the collection of traditional mechanical piano being played to information, these information can offer subsequent treatment software and carry out analyzing and processing, and such as carrying out, instruction analysis is used.
accompanying drawing explanationbelow in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the mounting structure schematic diagram of the mechanical piano of the present invention harvester of playing information;
Fig. 2 is the structural representation that mechanical piano of the present invention is played the harvester of information;
Fig. 3 is the partial structurtes schematic diagram of the mechanical piano of the present invention harvester of playing information;
Below each unit number in Figure of description of the present invention is described:
1---photoelectric reflection switch;
11---emitting head;
12---Receiver;
2---microprocessor;
3---key;
4---back up pad.
embodimentas Fig. 1, 2, shown in 3, the harvester that mechanical piano of the present invention is played information comprises photoelectric reflection switch 1 and microprocessor 2, photoelectric reflection switch 1 comprises emitting head 11 and Receiver 12, the emitting head 11 of a described photoelectric reflection switch 1 and Receiver are towards the outside surface of 12 outside surfaces to a key 3 or a key linkage part, the distance between the outside surface of the outside surface of this photoelectric reflection switch and a key or a key linkage part is converted into electric signal by photoelectric reflection switch, this electrical signal intensity becomes positive correlation or negative correlation with distance, microprocessor 2 connects photoelectric reflection switch 1, in microprocessor 2, be preset with threshold value, for each key 3, electrical signal intensity logic that microprocessor 2 records this key photoelectric reflection switch 1 in the time of down state not judge that this key is in the state of upspringing, the electrical signal intensity that microprocessor 2 detects photoelectric reflection switch 1 changes and calculates electrical signal intensity after changing and the difference between electrical signal intensity when down state not, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor 2 logics judge that this key 3 is down state by the state-transition of upspringing, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor 2 logics judge that this key continues keep the state of upspringing or change by down state the state of upspringing into, microprocessor 2 sends the digital signal of this key of reflection in down state or the state of upspringing.
Adopt above design, photoelectric reflection switch can be converted to the motion of mechanical piano key the variation of electrical signal intensity, such as being the variation of magnitude of voltage.For each key, the electrical signal intensity of this key of microprocessor records photoelectric reflection switch in the time of down state not the logic of acquiescence judge that this key is in the state of upspringing;
The electrical signal intensity that microprocessor detects photoelectric reflection switch changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, this difference can reflect key be pressed after from the move distance of initial position.In the time that the move distance of key does not reach certain numerical value, can think that this key still keeps the state of upspringing; In the time that the move distance of key meets or exceeds certain numerical value, can think that this key is pressed; In the time that the move distance of key is less than certain numerical value again, can think that this key is returned to the state of upspringing; Therefore the threshold value being preset with in microprocessor is to reflect this key at down state or the distance changing between state of upspringing.The absolute difference and the threshold value that calculate electrical signal intensity variation are compared, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, and microprocessor sends the digital signal of this key in down state; When absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, and microprocessor sends the digital signal of this key in the state of upspringing.Thereby realize the process that mechanical piano is played to information digitalization.Meanwhile, can be according to the mechanical piano of different model and the default different threshold value of the concrete setting position of photoelectric reflection switch, to adapt to the piano of different model.Also can be the different multiple different threshold values of key definition simultaneously.The difference of change in electric due to what calculate, rather than One-Point-Value, even if it is aging that photoelectric reflection switch occurs, cause the electrical signal intensity detecting to change, the difference calculating still can not change, and therefore still can not make a mistake by the upspring accuracy of state and down state logic judgement of difference.
The harvester that mechanical piano of the present invention is played information also comprises back up pad 4, back up pad 4 is dismountable to be fixed in casing of piano or piano case, photoelectric reflection switch 1 is fixed in back up pad 4, and after back up pad 4 is fixing, the emitting head 11 of photoelectric reflection switch 1 and Receiver 12 are towards the outside surface of a key 3 or the outside surface of a key linkage part.Whole photoelectric reflection switches 1 is arranged in back up pad 4, when use, only need directly back up pad 4 to be fixed in casing of piano or piano case, can realize like this that harvester is independent of the fast assembling-disassembling of mechanical piano and the photoelectric reflection position of the switch is stable in use.
The top that is fixed on key linkage part in qin case of back up pad 4 dismountable levels of the present invention, photoelectric reflection switch 1 emitting head 11 and Receiver 12 are towards the upper surface of key linkage part.When use, open qin case, put into back up pad, make with photoelectric reflection switch one facing to key linkage part, and each photoelectric reflection switch emitting head and the respectively corresponding key linkage part of Receiver.Suppose that electric signal is that magnitude of voltage illustrates, when user has set up after equipment, in the time not pressing key, for each key, the magnitude of voltage (being defined as initial voltage value) of microprocessor records photoelectric reflection switch now logic judge that this key is in the state of upspringing; When user presses key, key linkage part moves upward and relies on photoelectric reflection switch, along with reducing of distance between key linkage part and photoelectric reflection switch, the magnitude of voltage that photoelectric reflection switch sends to microprocessor increases, microprocessor calculates the now difference between magnitude of voltage and initial voltage value, in the time that the absolute value of difference is less than threshold value, judge that this key is still in the state of upspringing, in the time that the absolute value of difference is equal to or greater than threshold value, judge that this key is down state by the state-transition of upspringing.When user decontrols key, key is upspring, and key linkage part moves downward away from photoelectric reflection switch, and the magnitude of voltage that photoelectric reflection switch sends to microprocessor reduces, in the time that difference is less than threshold value again, judge that this key changes by down state the state of upspringing into.
The quantity of photoelectric reflection switch 1 of the present invention is consistent with the quantity of piano key 3, the corresponding outside surface of a key 3 of each photoelectric reflection switch 1 or the outside surface of a key linkage part.For traditional mechanical piano, generally by 88 keys, can adopt 88 photoelectric reflection switches to aim at respectively each key and gather.Can play information acquisition to whole keys like this.The number of photoelectric reflection switch can be determined by the key number of mechanical piano.
Mechanical piano is played the acquisition method of information, comprises the steps step 1: determine the piano key number that needs collection, step 2: the photoelectric reflection switch equating with the piano key number of needs collection is aimed at respectively to the outside surface of each key or the outside surface of key linkage part, step 3: the distance between this photoelectric reflection switch and its key outside surface of aiming at or key linkage part outside surface is converted into electric signal by each photoelectric reflection switch, according to photoelectric reflection switch installation site, this electrical signal intensity becomes positive correlation or negative correlation with distance, step 4: key is in the time of down state not, and electric signal is sent to microprocessor by each photoelectric reflection switch, and the electrical signal intensity of each photoelectric reflection switch of microprocessor records logic judge that key is in the state of upspringing, step 5: be preset with threshold value in microprocessor, the electrical signal intensity that microprocessor detects photoelectric reflection switch for each key changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, step 6: microprocessor sends the digital signal of each key of reflection in down state or the state of upspringing.
Photoelectric reflection switch described in the inventive method step 2 is arranged in back up pad, be fixed in piano case dismountable the back up pad with photoelectric reflection switch, the photoelectric reflection switch equating with the piano key number of needs collection is aimed at respectively the outside surface of each key or the outside surface of key linkage part.
The top that is fixed on key linkage part in qin case of the dismountable level of back up pad described in the inventive method, photoelectric reflection switch emitting head and Receiver are towards the upper surface of key linkage part.
Microprocessor described in the inventive method is single-chip microcomputer.
Reflection photoelectric switch in the present invention can use commercially available TCRT5000 reflection photoelectric switch to realize, and this infrared sensor has noncontact, convenient welding, stable performance, moderate cost.This reflection photoelectric switch can carry out being sent to microprocessor after shaping and filtering to the voltage gathering.
Microprocessor can use the STC12C5608AD single-chip microcomputer of commercially available Nantong Guo Xin Microtronic A/S.
The electric signal that reflection photoelectric switch of the present invention gathers can be voltage, electric current or other signals that the distance between the outside surface of the outside surface of reflection photoelectric switch and a key or a key linkage part can be reflected.The intensity of this electric signal becomes positive correlation or negative correlation mainly to be determined by reflection photoelectric switch installation site and computing function with reflected distance, and distance is monotonic quantity with the function of electrical signal intensity.
The parts that key linkage part described in the present invention is mechanical piano, require direct or indirect being in transmission connection of these parts and key, and it can move along with the motion of key, thus the motion state of reflection key.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure transformation that utilizes instructions of the present invention and accompanying drawing content to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. mechanical piano is played the harvester of information, it is characterized in that: it comprises photoelectric reflection switch and microprocessor, photoelectric reflection switch comprises emitting head and Receiver, the emitting head of a described photoelectric reflection switch and Receiver are towards the outside surface of a key or the outside surface of a key linkage part, the distance between the outside surface of the outside surface of this photoelectric reflection switch and a key or a key linkage part is converted into electric signal by photoelectric reflection switch, this electrical signal intensity becomes positive correlation or negative correlation with distance, microprocessor connects photoelectric reflection switch, in microprocessor, be preset with threshold value, for each key, electrical signal intensity the logic of this key of microprocessor records photoelectric reflection switch in the time of down state not judge that this key is in the state of upspringing, the electrical signal intensity that microprocessor detects photoelectric reflection switch changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, microprocessor sends the digital signal of this key of reflection in down state or the state of upspringing.
2. mechanical piano according to claim 1 is played the harvester of information, it is characterized in that: the harvester that described mechanical piano is played information also comprises back up pad, back up pad is dismountable to be fixed in casing of piano or piano case, photoelectric reflection switch is fixed in back up pad, and after back up pad is fixing, the emitting head of a photoelectric reflection switch and Receiver are towards the outside surface of a key or the outside surface of a key linkage part.
3. mechanical piano according to claim 2 is played the harvester of information, it is characterized in that: the top that is fixed on key linkage part in qin case of the described dismountable level of back up pad, photoelectric reflection switch emitting head and Receiver are towards the upper surface of key linkage part.
4. play the harvester of information according to the arbitrary mechanical piano described in claim 1,2,3, it is characterized in that: the described quantity of photoelectric reflection switch and the quantity of piano key are consistent the corresponding outside surface of a key of each photoelectric reflection switch or the outside surface of a key linkage part.
5. play the harvester of information according to the arbitrary mechanical piano described in claim 1,2,3, it is characterized in that: described microprocessor is single-chip microcomputer.
6. play the harvester of information according to the arbitrary mechanical piano described in claim 1,2,3, it is characterized in that: described microprocessor externally sends the digital signal of this key of reflection in down state or the state of upspringing in the mode of serial ports.
7. mechanical piano is played the acquisition method of information, it is characterized in that: step 1: determine the piano key number that needs gather, step 2: the photoelectric reflection switch equating with the piano key number of needs collection is aimed at respectively to the outside surface of each key or the outside surface of key linkage part, step 3: the distance between this photoelectric reflection switch and its key outside surface of aiming at or key linkage part outside surface is converted into electric signal by each photoelectric reflection switch, according to photoelectric reflection switch installation site, this electrical signal intensity becomes positive correlation or negative correlation with distance, step 4: key is in the time of down state not, and electric signal is sent to microprocessor by each photoelectric reflection switch, and the electrical signal intensity of each photoelectric reflection switch of microprocessor records logic judge that key is in the state of upspringing, step 5: be preset with threshold value in microprocessor, the electrical signal intensity that microprocessor detects photoelectric reflection switch for each key changes and calculates electrical signal intensity after variation and the difference between electrical signal intensity when down state not, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state reaches or is greater than threshold value, microprocessor logic judges that this key is down state by the state-transition of upspringing, when absolute difference between electrical signal intensity when electrical signal intensity after changing and not down state is less than threshold value, microprocessor logic judges that this key continues keep the state of upspringing or change by down state the state of upspringing into, step 6: microprocessor sends the digital signal of each key of reflection in down state or the state of upspringing.
8. mechanical piano according to claim 7 is played the acquisition method of information, it is characterized in that: the photoelectric reflection switch described in step 2 is arranged in back up pad, be fixed in piano case dismountable the back up pad with photoelectric reflection switch, the photoelectric reflection switch equating with the piano key number of needs collection is aimed at respectively the outside surface of each key or the outside surface of key linkage part.
9. mechanical piano according to claim 8 is played the acquisition method of information, it is characterized in that: the top that is fixed on key linkage part in qin case of the described dismountable level of back up pad, photoelectric reflection switch emitting head and Receiver are towards the upper surface of key linkage part.
10. the acquisition method of playing information according to the arbitrary mechanical piano described in claim 7 to 9, is characterized in that: described microprocessor is single-chip microcomputer.
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| CN113012664A (en) * | 2021-02-09 | 2021-06-22 | 广州游乐学科技有限公司 | Method and device for detecting playing piano and auxiliary playing piano equipment |
| WO2023161673A1 (en) * | 2022-02-24 | 2023-08-31 | Duality Doo Preduzece Za Izradu Muzickih Instrumenata Beograd – Vracar | Duality - hybrid mechanism for acoustic piano |
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| CN106981283B (en) * | 2016-01-15 | 2020-02-21 | 森兰信息科技（上海）有限公司 | Piano key detection method and system |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
| US10636402B2 (en) | 2016-01-15 | 2020-04-28 | Sunland Information Technology Co., Ltd. | Systems and methods for automatic calibration of musical devices |
| US10950137B2 (en) | 2016-01-15 | 2021-03-16 | Sunland Information Technology Co., Ltd. | Smart piano system |
| US11328618B2 (en) | 2016-01-15 | 2022-05-10 | Sunland Information Technology Co., Ltd. | Systems and methods for calibrating a musical device |
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| CN107202344A (en) * | 2016-03-16 | 2017-09-26 | 博西华电器（江苏）有限公司 | Position monitoring device, household electrical appliance and the accident extinguishing based reminding method of operating element |
| CN107180573A (en) * | 2017-06-13 | 2017-09-19 | 音乐梦想（北京）科技有限公司 | A kind of piano playing fingering data acquisition device |
| CN109065009A (en) * | 2018-10-18 | 2018-12-21 | 飞来教育科技（深圳）有限公司 | A kind of built-in piano key action detection device |
| CN113012664A (en) * | 2021-02-09 | 2021-06-22 | 广州游乐学科技有限公司 | Method and device for detecting playing piano and auxiliary playing piano equipment |
| WO2023161673A1 (en) * | 2022-02-24 | 2023-08-31 | Duality Doo Preduzece Za Izradu Muzickih Instrumenata Beograd – Vracar | Duality - hybrid mechanism for acoustic piano |
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