CN103093803A - Recording system of piano - Google Patents
Recording system of piano Download PDFInfo
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- CN103093803A CN103093803A CN2013100169265A CN201310016926A CN103093803A CN 103093803 A CN103093803 A CN 103093803A CN 2013100169265 A CN2013100169265 A CN 2013100169265A CN 201310016926 A CN201310016926 A CN 201310016926A CN 103093803 A CN103093803 A CN 103093803A
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- key
- guide rail
- inductor
- control box
- photoelectric sensor
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- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a recording system of a piano. The recording system comprises a main control box and a sensor guide rail, wherein a sensor interface and a universal serial bus (USB) interface are arranged on the main control box; and the sensor guide rail is connected with the sensor interface on the main control box through a ribbon cable. A photoelectric sensor arranged below a keyboard of an acoustic piano is used for sensing and distinguishing different musical notes and expressive force data of the musical notes, recording the captured processes of the different musical notes and the expressive force data of the musical notes and storing the captured processes into a device which is connected with the USB interface. The recording system of the piano is simple in structure, low in cost and suitable for all types of pianos, and the photoelectric sensor is convenient to assemble.
Description
Technical field
The present invention relates to the recording technology field, particularly a kind of piano recording system.
Background technology
Piano is the king of musical instrument, and along with the development of electronic technology, the especially generally application of micro computer makes piano outside keeping original traditional advantage, more gives its many function, thereby satisfies the multifaceted needs such as people's appreciation, exercise, teaching.
Exist at present many methods for detection of the motion of a key and the movement velocity of a key, the method that some other certain keyboards for musical instruments note expressive force data of seizure are also arranged, these methods are that the device of the mechanical switch structure of utilization is realized, the method that this use mechanical sense is answered has many obvious weak points, for example, induction does not change, and controls after touching can't predict etc.In addition, the feel of key when this type of switch can have influence on and play is installed also very time-consumingly, need to do the adjustment of very complicated vertical and horizontal.
The above-mentioned restriction that the present invention brings in order to solve mechanical switch just provides a kind of piano recording system simple in structure, easy for installation, with low cost.
Summary of the invention
In view of the foregoing defects the prior art has, the invention provides a kind of piano recording system, this recording system realizes responding to and differentiating the expressive force data of different notes and note by the photoelectric sensor that is arranged on below the primary sound fingerboard, and the different notes that will capture are connected the process record of data and are got off to store in the device that USB connects with the note expressive force.This system architecture is simple, and photoelectric sensor is easy for installation, and is with low cost, is applicable to the piano of various models.
For reaching above-mentioned purpose, the present invention takes following scheme:
A kind of piano recording system, this recording system comprise master control box and inductor guide rail, are provided with inductor interface and USB interface on master control box, and the inductor guide rail is connected with inductor interface on master control box by a ribbon cable, it is characterized in that:
4 PCB circuit boards are installed on the inductor guide rail, 22 photoelectric sensors are arranged on each PCB circuit board, connect by the retractility winding displacement between each PCB circuit board, each photoelectric sensor is made of heads 1 light emitting diode and 1 phototransistor, an optical sensor all is installed under each key, the PCB circuit board can slide on the inductor guide rail, and is fixed on the inductor guide rail by fixed screw;
Master control box is connected with the computing machine that the recording software system is installed by USB interface, and with the computer export data.
Preferably, include the little processing with analog/digital conversion ADC function in master control box, each output voltage data of sensing from photoelectric sensor can be transferred on analog/digital conversion ADC in little processing by the inductor interface, by the output voltage numeralization of analog/digital conversion with photoelectric sensor, little processing is arranged on each photoelectric sensor on the inductor guide rail by continuous scan round, obtains the output voltage data that each photoelectric sensor sends.
The present invention provides a kind of excellent perfect taping tool of playing that records for the user.This system is by high-sensitive optical sensor, accurately catches and plays process, precisely record performance often in a flash, the keeping etc. of the speed of key, pedal, each trickle action and variation.The weight speed of gyration of key, step on the accurate metering of lobe tenuto etc., record is carried in each trickle variation one by one, as the wonderful performance of pianist be obvious before.Automatically conversion midi format function, more allow the user follow one's bent and be kept in any computer or other storeies.
Description of drawings
Fig. 1 is the schematic diagram of optical sensor guide rails assembling in piano recording system of the present invention;
Fig. 2 is piano recording system hardware connection diagram of the present invention;
Fig. 3 is the output voltage schematic diagram of the photoelectric sensor that uses in the piano recording system;
Fig. 4 is the output voltage crest schematic diagram of photoelectric sensor when knocking piano key;
Fig. 5 is the measurement data of the piano key spacing of the different brands measured of photoelectric sensor.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
Fig. 1 shows the schematic diagram of optical sensor guide rails assembling in piano recording system of the present invention, comprising key 101, photoelectric sensor 102, PCB circuit board 103, inductor guide rail 104, retractility winding displacement 105 and PCB circuit board fixed screw 106.
This system uses photoelectric sensor, can catch the movement of the key of forgiving in music data and the data of translational speed.Under each key of fingerboard, optical sensor is installed all, the corresponding key of photoelectric sensor, optical sensor is by including a light emitting diode and the electronic unit that phototransistor forms, respond to invisible LED light by optical inductor, the light of emission reflects when running into the key lower surface, this light that reflects can be detected, and proportional light is converted into the voltage of phototransistor output, the distance between the size of the voltage of export by phototransistor shows bottom optical inductor and key.
Fig. 2 shows piano recording system hardware connection diagram of the present invention, comprising the USB interface 205 of inductor interface 201, connection inductor guide rail 202, master control box 203 and connection computer system.This recording system comprises the inductor guide rail 104 shown in master control box 203, Fig. 1, wherein is provided with inductor interface 201 on master control box 203, and inductor guide rail 104 is connected with inductor interface 201 on master control box 203 by a ribbon cable.
include the micro-chip processor (not shown) with analog/digital conversion ADC function in master control box 203, each output voltage data of sensing from photoelectric sensor 102 can be transferred on analog/digital conversion ADC on micro-chip processor by inductor interface 201, by the output voltage numeralization of analog/digital conversion with photoelectric sensor 102, compare with threshold level again, the complete procedure of such key motion, the expressive force that comprises key can be detected, the variation tendency that key is pressed and key is pressed output voltage when lifting as shown in Figure 3.
Little processing is arranged on each photoelectric sensor 102 on inductor guide rail 104 by continuous scan round, obtains the output voltage data that each photoelectric sensor 102 sends, and so just can measure the magnitude of voltage of each key.If the movement rate of known key, the volume of this key just can control by the sound engine so, and is same, and we also can control some other characteristic of tone, plays sound, tone color etc. as piano.Little processing in master control box 203 sends to by the voltage value data of each key that USB interface 205 will be obtained the computing machine that the recording software system is installed, analyzing stored by the complete paired data of computing machine, this system uses compatible musical instrument digital interface MIDI, in computing machine, output and storage data are with the midi signal coding, then further process.
The recording software system of installing in by calculating being can realize initialization setting and the detection to inductor guide rail 202.These software systems can realize catching the data of note and note expressive force, and are adjusted.This software systems first step operation regulatory function is determined each key not bullet and the overall positions when playing, and is calculated that the result that draws is exactly the threshold value of each key first order and the second level, then calculates with this value.These threshold values that independently generate can allow system capture the effect of music gamut, comprise that trill, staccato, legato reach the lightest playing effect etc.Next article carries out key calibration, left and right alignment inspection and key test automatically by these software systems.
At first use the USB line that master control box 203 is connected with computing machine, and connect inductor guide rail 202 and master control box 203, move on computers inductor guide rail (LXR) and set, following information can occur:
-LXR user arranges-1.04 versions
The connection of-LXR is opened
-LXR connects
-LXR version-1.03 coding (SN) 00000000
After inductor guide rail LXR successful connection, following menu can appear:
1. show inductor guide rail information
2. calibration key
3
. set velo curves figure
4. test whole keys
5. the record key moves
6. monitor the key value
7. registration service
Need to prove, in calibration process, each key is to test and measure the displacement of key according to identical standard, whether tablet and the track of calibrating also simultaneous verification correctly align, and should compare dark room or not have to carry out in direct light situation in order to ensure the accuracy calibration of calibration.
Press numerical key " 2 " startup " calibration key ", at this moment, following information can occur:
Attention:
Is light source direct projection light in the room of piano?
1.Yes(be)
2.No(no)
Press numerical key " 1 " or " 2 " and be confirmed whether to be in the lighting environment of direct projection, next following information will occur:
Calibrating the position of piano key that dispatches from the factory, please wait
Key moves calibration
Please by first key
Operator from left 1 to right 88 presses each key successively, can only press a key at every turn, and need after pressing key is remained on lower position, until hear spread out of a burst of " short serge sound " from computing machine.System can demonstrate the aligning key degree of depth (take μ m as the unit) content information relevant with the ghost image level on each key.The degree of depth of typical case's key should be between 5000-10000 μ m, for example the information of following demonstration:
The first key degree of depth accepted is the 06573 horizontal L00000R00304 of μ m ghost image
Key has been completed calibration
Please by second key
So analogize, complete the calibration to 88 keys.After having calibrated the final stage key (every 22 keys are one section), the alignment information such as the number percent of aiming at about just can showing and chart.If incorrect alignment, computer will show a warning and sound.For example, when the 103 correct alignment of all PCB circuit boards, show below information:
The symmetry of the 1st keyboard section: ... .*|..... (4%)
The symmetry of the 2nd keyboard section: ... ..*..... (0%)
The symmetry of the 3rd keyboard section: ... ..*..... (0%)
The symmetry of the 4th keyboard section: ... ..*..... (2%)
If leftmost circuit board is too toward the left side, information shows:
The symmetry of the 1st keyboard section: ..*...|..... (56%)
The incorrect alignment of the tablet of the 1st (the from the 1st to the 22nd key) should move right
The symmetry of the 2nd keyboard section: ... * ..|..... (36%)
The symmetry of the 3rd keyboard section: ... .*.|..... (19%)
The symmetry of the 4th keyboard section: ... .*|..... (4%)
As want to test the whether normal operation of all key induced devices, and first start the setting of LXR, then press numerical key " 4 " (testing all keys).Then press each key (if be detected during button, the dynamics that can be shown to the key number and detect) at least one times.All pass through test as all keys, demonstration information:
All keys are by test OK, and test is passed through.
During test was carried out, the position that relatively moves of photoelectric sensor and key can be measured by system.If the photoelectric sensor circuit board is (left and right is over 2 millimeters) of correct alignment not, system can show the update information after calibration, for example, shows below information:
The 3rd tablet (45-66 key) be alignment not, should be moved to the left.
Expression need to be loosening with the 3rd photoelectric sensor circuit board, and toward moving to left approximately 2mm.If there is this prompting, need to rerun calibration.
Fig. 4 shows the output voltage crest schematic diagram of photoelectric sensor when knocking piano key.By measuring through the time between first and second threshold level, can calculate the translational speed of key.Select two threshold level to measure upper up voltage when key is pressed, we select these two threshold level to be approximately 50% and 75% of key motion.Key when motion, use these two threshold values can select live part in the key motion.When 50% and 75% key moved the two threshold value generation, key detected the value that almost will reach its maximal rate by constantly pressing down to produce mechanical motion.As can be seen from Figure 4, can detect key and impact time, key reset time.
One cover threshold voltage uses on all keys, and if necessary, each key can also have its own independent threshold value.The key value range can arrange or realize by automatic calibration in factory, and therefore, this value can be stored in and be used as further modification in micro-chip processor.Fig. 5 shows the measurement data of the piano key spacing of different brands, when the piano of different brands uses this recording system, can carry out the adjustment of parameter according to these data.
Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, the intent of the present invention also comprises these changes and is out of shape interior.
Claims (2)
1. piano recording system, this recording system comprises master control box and inductor guide rail, is provided with inductor interface and USB interface on master control box, the inductor guide rail is connected with inductor interface on master control box by a ribbon cable, it is characterized in that:
4 PCB circuit boards are installed on the inductor guide rail, 22 photoelectric sensors are arranged on each PCB circuit board, connect by the retractility winding displacement between each PCB circuit board, each photoelectric sensor is made of heads 1 light emitting diode and 1 phototransistor, an optical sensor all is installed under each key, the PCB circuit board can slide on the inductor guide rail, and is fixed on the inductor guide rail by fixed screw;
Master control box is connected with the computing machine that the recording software system is installed by USB interface, and with the computer export data.
2. the piano recording system described according to claim 1 is characterized in that:
Include the little processing with analog/digital conversion ADC function in master control box, each output voltage data of sensing from photoelectric sensor can be transferred on analog/digital conversion ADC in little processing by the inductor interface, by the output voltage numeralization of analog/digital conversion with photoelectric sensor, little processing is arranged on each photoelectric sensor on the inductor guide rail by continuous scan round, obtains the output voltage data that each photoelectric sensor sends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016926.5A CN103093803B (en) | 2013-01-17 | 2013-01-17 | A kind of piano recording system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016926.5A CN103093803B (en) | 2013-01-17 | 2013-01-17 | A kind of piano recording system |
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| Publication Number | Publication Date |
|---|---|
| CN103093803A true CN103093803A (en) | 2013-05-08 |
| CN103093803B CN103093803B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310016926.5A Active CN103093803B (en) | 2013-01-17 | 2013-01-17 | A kind of piano recording system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702120A (en) * | 2015-04-08 | 2016-06-22 | 易弹信息科技（上海）有限公司 | Piano sound collecting and broadcasting device and key calibration method |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5231283A (en) * | 1989-03-27 | 1993-07-27 | Gulbransen, Inc. | Opto-electronic sensing method and device for an acoustic piano |
| US5567902A (en) * | 1995-01-06 | 1996-10-22 | Baldwin Piano And Organ Company | Method and apparatus for optically sensing the position and velocity of piano keys |
| CN1667696A (en) * | 2004-03-12 | 2005-09-14 | 雅马哈株式会社 | Automatic player musical instrument, automatic player used therein and method for exactly controlling keys |
-
2013
- 2013-01-17 CN CN201310016926.5A patent/CN103093803B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5231283A (en) * | 1989-03-27 | 1993-07-27 | Gulbransen, Inc. | Opto-electronic sensing method and device for an acoustic piano |
| US5567902A (en) * | 1995-01-06 | 1996-10-22 | Baldwin Piano And Organ Company | Method and apparatus for optically sensing the position and velocity of piano keys |
| CN1667696A (en) * | 2004-03-12 | 2005-09-14 | 雅马哈株式会社 | Automatic player musical instrument, automatic player used therein and method for exactly controlling keys |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702120A (en) * | 2015-04-08 | 2016-06-22 | 易弹信息科技（上海）有限公司 | Piano sound collecting and broadcasting device and key calibration method |
| 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 |
| US10657943B2 (en) | 2016-01-15 | 2020-05-19 | Sunland Information Technology Co., Ltd. | Systems and methods for calibrating a musical device |
| 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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| Publication number | Publication date |
|---|---|
| CN103093803B (en) | 2016-06-29 |
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Denomination of invention: A piano recording system Granted publication date: 20160629 Pledgee: Hubei Three Gorges Rural Commercial Bank Co.,Ltd. Free Trade Zone Branch Pledgor: YICHANG JINBAO MUSIC INSTRUMENT MANUFACTURE Co.,Ltd. Registration number: Y2024980000961 |