CN102842251B - Laser marking musical instrument teaching system and method - Google Patents

Abstract

The invention relates to a laser marking musical instrument teaching system and method. The teaching system comprises a musical signal acquisition end, a singlechip system and a laser projection device. Wherein the music signal acquisition end acquires and processes music signals and controls the singlechip system through wireless communication to regulate the laser projection device to generate sequential laser projection signals for indicating the play of a musical instrument. The teaching method comprises initial positioning, musical signal acquisition and identification, and laser projection teaching. The teaching system has various teaching modes, does not need to be installed on the musical instrument, is small in size and convenient to carry, and does not need change of structure of the musical instrument. The teaching method is simple and easy to learn, good in operability, suitable for users of different ages and different musical instrument playing levels, is wide in application range, and can be used for teaching different musical instruments.

Description

Laser-marking musical instrument teaching system and teaching method

Technical field

The present invention relates to a kind of musical instrument teaching system and teaching method, particularly a kind of laser-marking musical instrument teaching system and teaching method.

Technical background

Musical instrument is liked by numerous people is popular, but for new hand, musical instrument plays training spended time length and somewhat expensive; For teacher, traditional teaching pattern seems inefficiency, and therefore the exploitation of intelligent teaching system is necessary.US Patent No. 20120064498A1 reports a kind of based on computer implemented interactively musical instrument teaching system, it is made up of musical instrument, interface, computing machine, need inside musical instrument to embed visual cues device, computing machine is by providing the control signal of teaching while software receipt interface signal, control the visual cues device inside musical instrument, the visual signal prompt of performance hint for user, to reach the function of teaching.But the musical instrument teaching system that this invention relates to needs to add visual cues device, such as guitar, need to increase corresponding visual cues device at each root string of guitar, therefore needing to transform musical instrument itself to realize interactively teaching, cannot apply to widely in existing musical instrument.

US Patent No. 2005005761A1 reports a kind of system of teaching music, it achieve the visual instruction that musical instrument is played, but in the process realized, pilot lamp is positioned at the place near musical instrument, as shown in Fig. 1 of the Figure of description of patent, pilot lamp is positioned at the top of keys of musical instrument.Because the indicator signal of vision is not presented on the button of musical instrument exactly, play in process and need artificially signal designation to be carried out corresponding with corresponding button, add the learning difficulty of player.In addition, such realization also needs a large amount of pilot lamp to be embedded into musical instrument surface, is difficult to apply to widely in existing musical instrument.

Summary of the invention

The object of the invention is to for the deficiencies in the prior art, a kind of laser-marking musical instrument teaching system and teaching method are provided.

The present invention adopts following technical scheme to realize:

A kind of laser-marking musical instrument teaching system, comprises music signal collection terminal, Single Chip Microcomputer (SCM) system and laser projection device.

The music signal collected is converted to text code by music signal collection terminal by laser-marking teaching system of the present invention, text code can be converted into by image recognition technology by the music signal of visual identity (picture signal), text code can be converted into by audio frequency identification technique by the music signal of Auditory identification (voice signal), music signal collection terminal is according to this text code, coordinate is converted thereof into by algorithm, angle, the time series of projection time length, using this time series as control signal, by wireless communication transmissions to Single Chip Microcomputer (SCM) system, Single Chip Microcomputer (SCM) system reception control signal, drive according to the time sequencing of control signal and control laser projection device and carry out projection teaching.

Laser-marking teaching system of the present invention can realize real-time teaching and reproduce teaching, and real-time teaching is music signal collection terminal gathering and identify while, sends control signal control laser projection device and carry out teaching to Single Chip Microcomputer (SCM) system.User can accomplish to listen while play by teaching system, or sees while play.Reproduce teaching to refer in music signal collection terminal and can store text code, according to the demand of user, repeatedly can carry out teaching.

Described music signal collection terminal comprises computing machine and/or mobile intelligent terminal.

Described mobile intelligent terminal, for can catch external information, can carry out calculating, treatment and analysis, and can carry out the portable set of information transmission between different terminals; Described mobile intelligent terminal includes but not limited to various smart mobile phone, PDA, notebook computer, net book, panel computer (as ipad etc.), palm PC, intelligent handheld device, Pocket PC, Tablet PC etc.

Described music signal comprises paper score, electronic music etc. can by the signal of visual identity (i.e. picture signal), real-time music, voice, live concerts, TV programme recording etc. can by the signal of Auditory identification (i.e. voice signals), and MIDI, MP3, WAV, AAC etc. can by the standard audio format files of computing machine or mobile intelligent terminal identification.

Music signal collection terminal can be gathered by the music signal that vision (image) or the sense of hearing (sound) identify and identify music score, real-time audio signal etc., obtains text code, and can generate control signal.

Described music signal collection terminal comprises three kinds: computing machine, mobile intelligent terminal, the compound system be made up of computing machine and mobile intelligent terminal.

The scope of application of described music signal collection terminal is:

1. adopt computing machine or mobile intelligent terminal to be suitable for any occasion as music signal collection terminal, be particularly suitable for individual, family etc. and need the private context that quantity of information to be processed is little;

2. the compound system be made up of computing machine and mobile intelligent terminal is suitable for any occasion as music signal collection terminal, is particularly suitable for operating room, concert etc. and needs the public occasion contained much information to be processed.

Described music signal collection terminal has three kinds of specific implementations:

1. computing machine

Computing machine is obtained by the information acquisition device of built-in or exterior arrangement can by the music signal of visual identity and/or Auditory identification, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, then computing machine is based on this text code, by algorithm rise time sequence, this time series sends to Single Chip Microcomputer (SCM) system by radio communication control signal as control signal.

2. mobile intelligent terminal

Mobile intelligent terminal is obtained by the information acquisition device of built-in or exterior arrangement can by the music signal of visual identity and/or Auditory identification, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, mobile intelligent terminal is based on this text code, by algorithm rise time sequence, this time series sends to Single Chip Microcomputer (SCM) system by radio communication control signal as control signal.

3. the compound system be made up of computing machine and mobile intelligent terminal can have two kinds of implementations:

(1) obtain by the music signal of visual identity and/or Auditory identification, mobile intelligent terminal can be outputted to by the information acquisition device of built-in computer or exterior arrangement.By image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, based on this text code, mobile intelligent terminal is by algorithm rise time sequence, this time series is as control signal, then by radio communication, control signal is sent to Single Chip Microcomputer (SCM) system.

(2) information acquisition device of or exterior arrangement built-in by mobile intelligent terminal obtains and by the music signal of visual identity and/or Auditory identification, can output to computing machine.By image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, based on this text code, computing machine is by algorithm rise time sequence, this time series is as control signal, by radio communication, control signal is sent to Single Chip Microcomputer (SCM) system.

Described information acquisition device refers to the device that the information (as image, sound, word, data etc.) in reality can be converted into coding that computing machine and/or intelligent mobile terminal can identify and/or electric signal, includes but not limited to picture pick-up device, sound pick-up outfit, scanning device etc.

Described Single Chip Microcomputer (SCM) system comprises single-chip microcomputer and bluetooth module.Single Chip Microcomputer (SCM) system receives by bluetooth module the control signal that music signal collection terminal generates, and controlled laser projection device projected by Micro Controller Unit (MCU) driving.

Described laser projection device can be made up of steering wheel, lasing light emitter and plane mirror, also can be made up of lasing light emitter, driving circuit, light deflector and prism.

1. the laser projection device be made up of lasing light emitter, steering wheel and plane mirror

Lasing light emitter for generation of instruction laser, with the rhythm of the frequency representation music of Laser Scintillation; Steering wheel is used for the angle that control plane catoptron rotates; Plane mirror is used for the laser reflection launched by lasing light emitter and plays/impact/musical instrument position touched to needing user.Lasing light emitter produces laser, the laser come is penetrated in plane mirror reflection by lasing light emitter, and steering wheel is used for the angle that control plane catoptron rotates, and carries out teaching on laser projection to musical instrument.

The scope of application: be applicable to any occasion, is particularly suitable for rhythm slow, needs the occasion that indicating range is large.

2. the laser that the laser projection device lasing light emitter be made up of lasing light emitter, driving circuit, light deflector and prism indicates in order to generation, with the rhythm of the frequency representation music of Laser Scintillation; Driving circuit is for controlling light deflector; Light deflector is for changing the deflection angle of laser; Prism is used for laser refraction to play/impact/musical instrument position touched to needing user.Lasing light emitter produces laser, and the laser that light deflector makes lasing light emitter produce deflects, and the light that prismatic refraction is penetrated from light deflector makes it deflect further, carries out teaching on laser projection to musical instrument.

The scope of application: be applicable to any occasion, the rhythm being specially adapted to music is fast, the occasion that instruction precision prescribed is high.

Laser-marking musical instrument teaching system of the present invention also comprises the automatic location of initial time laser projection, and namely when reset, laser projection autoscan, to obtain the corner profile information of musical instrument, realizes initial alignment.

Laser-marking musical instrument teaching system of the present invention comprises the multiple teaching patterns such as beginner mode, general mode, fine mode or professional mode, and different patterns adopts the different time intervals, can realize incremental teaching like this.

Described beginner mode is applicable to never to play the user of institute's teaching musical instrument or once played but do not contact institute's teaching musical instrument for a long time, cannot play out the user of complete song.Described beginner mode's rhythm (comprises adagio, does not comprise andante) between adagio to andante, and namely speed photographed between 66 bats per minute per minute 52 and (comprises per minute 52 to clap, do not comprise per minute 66 and clap).

Described general mode is applicable to contacted institute teaching musical instrument and can the user of the simple song of complete performance.Described general mode rhythm (comprises andante, does not comprise allegro) between andante to allegro, and namely speed photographed between 120 bats per minute per minute 66 and (comprises per minute 66 to clap, do not comprise 120 bats).

Described fine mode is applicable to contacted institute teaching musical instrument and can the user of complete performance intermediate complexity song.The tempo adjustment of original song can be allegro by described fine mode, and namely speed photographed between 168 bats per minute per minute 120 and (comprises per minute 120 to clap, do not comprise per minute 168 and clap).

Described professional mode is applicable to contacted institute teaching musical instrument and can the user of the highly difficult song of complete performance.Described professional mode can by the tempo increase of original song, and the upper limit is allegretto (per minute 208 clap), and namely prestissimo is less than or equal to 208 bats.

Any device that musical instrument of the present invention comprises by bullet, dials, knocks, touching means are sounded.

Musical instrument involved in the present invention can by the coordinate position in space determine will the position of bullet/dial/knock/touch, by the rhythm of the difference display music of the time point of bullet/dial/knock/touch, and represented the melody of music by the coordinate position in space and the combination of music rhythm.

As preferably, described musical instrument comprises stringed musical instrument, percussion instrument or keyboard instrument.

Described stringed musical instrument includes but not limited to harp, guitar, seven-stringed plucked instrument in some ways similar to the zither, Chinese lute, zither or bass.

Described percussion instrument includes but not limited to xylophone, celesta, tubular bells, ancient Chinese chime with 12 bells, drum, gong, angle iron, cymbals, castanets or sand mallet.

Described keyboard instrument includes but not limited to piano, pipe organ, accordion or mellotron.

The driving circuit of described laser projection device is made up of Voltage-Controlled oscillation circuit or digital frequency synthesizer.

Laser-marking musical instrument teaching system of the present invention adopts laser to carry out teaching mark, is separated with musical instrument, without the need to being arranged on musical instrument, therefore not needing the structure changing musical instrument itself, can be applied to easily in existing musical instrument.In addition, due to the controlling functions adopting the mode of software to realize laser teaching, teaching system of the present invention is made to have range of application very widely, for different musical instruments, only need to write corresponding control program on computers or be embedded into by corresponding control program the teaching that mobile intelligent terminal can realize to different musical instrument.

The present invention also provides a kind of teaching method of laser-marking musical instrument teaching system, comprises the steps:

(1) initial alignment;

(2) adopted coordinate system is determined according to the situation of initial alignment;

(3) music signal collection terminal gathers music signal and identifies, obtains text code, and generates control signal, by radio communication, control signal is transferred to described Single Chip Microcomputer (SCM) system;

(4) Single Chip Microcomputer (SCM) system reception control signal, drives and controls the teaching that laser projection device realizes musical instrument.

Wherein:

The initial alignment of step (1) is divided into two kinds of situations: for there being the musical instrument that standard shape size, fixed scale sort, there is standard pitch in sounding unit, teaching system can recommend the putting position of a laser projection device, user puts according to recommended location, and teaching system carries out offset correction according to the putting position of laser projection device; But there are standard pitch geomery and all unfixed musical instrument of scale sequence for each sounding unit, user can determine the putting position of laser projection device voluntarily, user knocks each sounding unit, music signal collection terminal identifiable design and pitch and the coordinate of catching each sounding unit.

Step (2) determines adopted coordinate system according to the situation of initial alignment: regular musical instrument location adopts coordinate system built-in in teaching system; User's self-defining coordinate system during irregular musical instrument location employing initial alignment.

Step (3) is specially music signal collection terminal and gathers music signal and identify, music signal collection terminal takes different recognition method for the different music signals collected, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, and convert this text code to coordinate by algorithm, angle and projection time length, these parameters are in chronological sequence saved as time series, this time series is as control signal, control signal by wireless communication transmissions to Single Chip Microcomputer (SCM) system.

Step (4) specifically refers to the control signal that Single Chip Microcomputer (SCM) system receives music signal collection terminal and sends, and drive according to control signal and control laser projection device, the projection angle making laser projection device change laser carries out projection teaching with projection duration.

The invention has the beneficial effects as follows:

1. the present invention can gather music signal in several ways, as passed through scanning music score, recording, shooting or adopting the mode of existing standard audio format file to gather music signal;

2. what the present invention adopted the mode of laser projection that bond order information is projected in musical instrument in an orderly manner according to certain time interval plays on position, and the user of musical instrument can play according to the instruction of laser;

3. the invention provides different teaching patterns to adapt to the demand of varying level user;

4. the present invention adopts the mode of software to realize main controlling functions, teaching system of the present invention is made to have range of application very widely, for different musical instruments, different platforms, only need write corresponding control program on computers, or write corresponding control program and be embedded on corresponding mobile intelligent terminal;

It is 5. of the present invention that laser-marking musical instrument teaching system does not need to be arranged on musical instrument, volume is little, easy to carry, without the need to changing the structure of musical instrument self, overcome the defect that structure, the installation steps that need change musical instrument itself when traditional musical instrument teaching apparatus is arranged on musical instrument are loaded down with trivial details, affect instruments sound effect;

6. musical instrument teaching method provided by the invention is easy to learn, workable, and be suitable for the user of all ages and classes and different instrument playing level, the scope of application widely.

Accompanying drawing explanation

Fig. 1, Fig. 2 are the structural representations of laser-marking musical instrument teaching system of the present invention;

Fig. 3 is the schematic diagram of music signal collection terminal in laser-marking musical instrument teaching system of the present invention;

Fig. 4 is the structural representation of laser-marking musical instrument teaching system of the present invention, and wherein laser projection device is made up of steering wheel, lasing light emitter, plane mirror;

Fig. 5 is the structural representation of laser-marking musical instrument teaching system of the present invention, and wherein laser projection device is made up of lasing light emitter, driving circuit, light deflector, prism;

Fig. 6 is the process flow diagram of laser-marking musical instrument of the present invention for regular musical instrument initial alignment;

Fig. 7 is the process flow diagram of laser-marking musical instrument of the present invention for irregular musical instrument initial alignment;

Fig. 8 is the front elevation that the present invention adopts the laser projection device be made up of steering wheel, lasing light emitter, plane mirror;

Fig. 9 is the side view that the present invention adopts the laser projection device be made up of steering wheel, lasing light emitter, plane mirror;

Figure 10 is the laser deflection schematic diagram of the laser projection device that the present invention is made up of lasing light emitter, driving circuit, light deflector, prism;

Figure 11 is the complete teaching flow chart of steps of laser-marking musical instrument teaching system of the present invention;

Figure 12 is the self-defined coordinate system figure of laser-marking musical instrument teaching system of the present invention;

Figure 13 is the piano teaching schematic diagram of laser-marking musical instrument teaching system of the present invention;

Figure 14 is the deflection angle schematic diagram of piano teaching;

Figure 15 is angle calculation schematic diagram;

Figure 16 is the water tumbler teaching schematic diagram of laser-marking musical instrument teaching system of the present invention;

Figure 17 be based on spherical ultrasonic motor teaching system to musical instrument combination teaching schematic diagram.

Shown in figure:

1---lasing light emitter, 2---plane mirror, 3---support, 4---screw;

5---light deflector, 6---prism, 7---key, 8---water tumbler,

9---the musical instrument such as dulcimer, piano, 10---the musical instrument such as Zheng, harp,

11---the musical instrument such as angle iron, cymbals, 12---the musical instrument such as frame drum, timpani

13---the musical instrument such as guitar, mellotron, 14---the musical instrument such as ancient Chinese chime with 12 bells, wooden fish,

15---spherical ultrasonic motor.

Embodiment

In order to illustrate in greater detail laser-marking musical instrument teaching method of the present invention and laser-marking musical instrument teaching system, describe the present invention in detail according to drawings and embodiments below.

As depicted in figs. 1 and 2, laser-marking musical instrument teaching system of the present invention comprises music signal collection terminal, Single Chip Microcomputer (SCM) system and laser projection device.Music signal collection terminal can be gathered by the music signal that vision (image) or the sense of hearing (sound) identify and identify music score, real-time audio signal etc., obtain text code, and can control signal be generated, by radio communication, control signal be transferred to described Single Chip Microcomputer (SCM) system; Described Single Chip Microcomputer (SCM) system reception control signal, drives and controls laser projection device, and laser projection (namely model-following control signal rhythmically) realizes the teaching of musical instrument in an orderly manner.

As shown in Figure 3, described music signal collection terminal has three kinds of modes: computing machine, mobile intelligent terminal, the compound system be made up of computing machine and mobile intelligent terminal.

The scope of application of described music signal collection terminal:

(1) adopt computing machine or mobile intelligent terminal to be suitable for any occasion as music signal collection terminal, be particularly suitable for individual, family etc. and need the private context that quantity of information to be processed is little;

(2) compound system be made up of computing machine and mobile intelligent terminal is suitable for any occasion as music signal collection terminal, is particularly suitable for operating room, concert etc. and needs the public occasion contained much information to be processed.

Described music collection terminal specific works mode is respectively:

(1) computing machine

Computing machine is obtained by the information acquisition device of built-in or exterior arrangement can by the music signal of visual identity and/or Auditory identification, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, then computing machine is based on this text code, by algorithm rise time sequence, this time series sends to Single Chip Microcomputer (SCM) system by radio communication control signal as control signal.

(2) mobile intelligent terminal

Mobile intelligent terminal is obtained by the information acquisition device of built-in or exterior arrangement can by the music signal of visual identity and/or Auditory identification, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, music collection terminal is based on this text code, by algorithm rise time sequence, this time series is as control signal, by radio communication, control signal is sent to Single Chip Microcomputer (SCM) system.

(3) compound system be made up of computing machine and mobile intelligent terminal can have two kinds of implementations:

1) being obtained by the information acquisition device of built-in computer or exterior arrangement can by the music signal of visual identity and/or Auditory identification, output to mobile intelligent terminal, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted into by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, based on this text code, mobile intelligent terminal is by algorithm rise time sequence, this time series is as control signal, then by radio communication, control signal is sent to Single Chip Microcomputer (SCM) system.

2) obtain can by the music signal of visual identity and/or Auditory identification for the information acquisition device of or exterior arrangement built-in by mobile intelligent terminal, output to computing machine, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, then the discernible text code of processor is converted into by audio frequency identification technique, based on this text code, computing machine is by algorithm rise time sequence, this time series is as control signal, then by radio communication, control signal is sent to Single Chip Microcomputer (SCM) system

As shown in Figure 4, in the structure of the laser-marking musical instrument teaching system of the laser projection device be made up of lasing light emitter, steering wheel, plane mirror, music signal collection terminal gathers music signal, standard audio format file is obtained by technical finesse, and according to standard audio format file, by algorithm generation time sequence, this time series, as control signal, is sent to Single Chip Microcomputer (SCM) system by the mode of radio communication.Bluetooth module in Single Chip Microcomputer (SCM) system receives the control signal that music signal collection terminal is sent by radio communication, single-chip microcomputer is sent to by serial ports, the frequency of one side Single-chip Controlling lasing light emitter luminescence and interval time, single-chip microcomputer is by servos control plane mirror on the other hand, to control laser projection direction.This device is applicable to any occasion, is particularly suitable for rhythm slow, needs the occasion that indicating range is large.

As shown in Figure 5, in the structure of the laser-marking musical instrument teaching system of the laser projection device be made up of lasing light emitter, driving circuit, light deflector, prism, music signal collection terminal gathers music signal, standard audio format file is obtained by technical finesse, and according to standard audio format file, by algorithm generation time sequence, this time series, as control signal, is sent to Single Chip Microcomputer (SCM) system by the mode of radio communication.Bluetooth module in Single Chip Microcomputer (SCM) system receives the control signal that music signal collection terminal is sent by radio communication, single-chip microcomputer is sent to by serial ports, the frequency of one side Single-chip Controlling lasing light emitter luminescence and interval time, single-chip microcomputer controls light deflector, to control the direction of laser projection by controlling driving circuit on the other hand.Wherein driving circuit is made up of Voltage-Controlled oscillation circuit or digital frequency synthesizer, and the signal of the different frequency that it produces can drive light deflector to produce different deflection angles.Laser is very little through the deflection angle of light deflector, by prism can further amplifying laser deflection angle, expand indicating range.This device is applicable to any occasion, and the rhythm being specially adapted to music is fast, the occasion that instruction precision prescribed is high.

As shown in figure 11, the complete teaching flow process of laser-marking teaching system of the present invention is as follows:

1st step initial alignment:

Initial alignment has two kinds of modes: regular musical instrument location and irregular musical instrument location, the putting position that laser projection device orientated as by described regular musical instrument is given by teaching system, and the putting position that laser projection device orientated as by described irregular musical instrument is user-defined.When musical instrument has that standard shape size, fixed scale sort, there is a standard pitch in sounding unit, as stringed musical instrument, percussion instrument or keyboard instrument etc., user can adopt two kinds of localization methods location, recommends to adopt regular musical instrument localization method; When there is standard pitch in each sounding unit of musical instrument, but geomery and scale sequence be not when all fixing, and the musical instrument system formed as multiple water tumbler, the musical instrument combination etc. of multiple musical instrument composition, user adopts irregular musical instrument localization method.

(1) regular musical instrument location

As shown in Figure 6, can be prestored the coordinate system of regular musical instrument in music signal collection terminal, user only need software interface select want the musical instrument of teaching, provide the position that laser projection device should be placed, user puts laser projection device according to given position, then carries out correcting.Music signal collection terminal can carry out offset correction according to the difference of laser projection device putting position.The method corrected: user clicks at the software interface of music collection terminal and starts, and allow music signal collection terminal send order and carry out laser scanning, treat that end points place is arrived in laser scanning, user clicks stop button in software interface, makes the end of scan, corrects and terminates.

(2) irregular musical instrument location

As shown in Figure 7, the position of the self-defined true origin of user, namely can put laser projection device arbitrarily.Then make each sounding unit sounding of musical instrument, the musical instrument system be such as made up of 8 water tumblers, knocks each water tumbler, allows each water tumbler pronounce, and the identification of music signal collection terminal also catches pitch and the coordinate of each sounding unit of musical instrument.User clicks stop button in software interface, makes the end of scan, corrects and terminates.

2nd step determines adopted coordinate system according to the situation of initial alignment: regular musical instrument location adopts coordinate system built-in in teaching system; User's self-defining coordinate system during irregular musical instrument location employing initial alignment.

3rd step music signal collection terminal gathers music signal, by image recognition technology, Graphic Exchanging can be become the discernible text code of processor by the music signal of visual identity (i.e. picture signal), the discernible text code of processor can be converted to by audio frequency identification technique by the music signal of Auditory identification (i.e. voice signal), standard audio format file can pass through player plays, convert voice signal to, be then converted into the discernible text code of processor by audio frequency identification technique.Music signal collection terminal, according to obtained text code, converts coordinate, angle and projection time length to by algorithm.Angle and coordinate and projection time length also exist corresponding relation, and these parameters are in chronological sequence saved as time series, and this time series sends to Single Chip Microcomputer (SCM) system as control signal by radio communication.

After 4th step Single Chip Microcomputer (SCM) system receives control signal, the angle controlling projection arrangement change projection according to the time series in control signal carries out teaching with projection duration.Projection duration can be controlled by the timer in single-chip microcomputer, and the control of angle is as follows:

(1) projection arrangement be made up of lasing light emitter, steering wheel, plane mirror

As shown in Figure 8, servos control plane mirror 2 and is rotated around the axle vertical with support 3, and DD' is the normal perpendicular to plane mirror 2, by changing the angle α between normal and laser, subpoint P position in the X-axis direction can be changed, namely change the horizontal ordinate of subpoint P.The X-axis of coordinate system of OX for setting up during initial alignment in Fig. 8.

As shown in Figure 9, MM' is the normal perpendicular to plane mirror 2, and the screw 4 in releases clamp 3 rotates the angle β of adjustable normal and laser, changes subpoint P position in the Y-axis direction, namely changes the ordinate of subpoint P.The Y-axis of coordinate system of OY for setting up during initial alignment in Fig. 9.

(2) projection arrangement be made up of lasing light emitter, driving circuit, light deflector, prism as shown in Figure 10, by changing the deflection of light deflector 5, the direction of laser projection can be changed, then the coordinate of subpoint is changed, because the actual deflection angle of light deflector is very little, the amplification of angle can be carried out by the refraction of prism 6, can expansion of laser light to project the scope of teaching.

5th step Single Chip Microcomputer (SCM) system judges whether projection teaching terminates, if not, continues execution the 4th step, otherwise terminates teaching.

The foundation of coordinate system can adopt following rule:

As shown in figure 12, with laser projection device point for initial point O, during initial alignment, music collection terminal can catch the length L of musical instrument ₁with width L ₂, take laser projection device as initial point, cross initial point and musical instrument length L ₁the parallel straight line in direction is as X-axis; Take laser projection device as initial point, cross initial point and with the width L of musical instrument ₂the parallel straight line in direction is as Y-axis; Cross laser projection device, and and X-axis, all vertical straight line of Y-axis is as Z axis.

In time series described in 3rd step there is corresponding relation in coordinate and angle, and the relation between coordinate and angle can be determined with the following method:

(1) length of musical instrument is L ₁, at L ₁on direction, the number of its sounding unit is N; The width of musical instrument is L ₂, at L ₂on direction, the number of its sounding unit is M, and projection arrangement is at L ₁drop shadow spread on direction is T, and projection arrangement is at L ₂drop shadow spread on direction is S.Described sounding unit, for single musical instrument, refers to the least unit can sounded in musical instrument, the key of such as piano, the string etc. of Zheng; For musical instrument system or musical instrument combination, sounding unit refers to each musical instrument in a musical instrument system or musical instrument combination, such as the musical instrument system of 8 water tumbler compositions, and single water tumbler is sounding unit.For piano, the length L of piano ₁there are 88 white keys in direction, and the N value of piano is 88; Be L at the width of piano ₂there are 1 white key and 1 black key in direction, and therefore the M value of piano is 2.For the musical instrument system of 8 water tumbler compositions, its arrangement mode is horizontally-arranged 4, and tandem 2, also namely at length L ₁there are 4 water tumblers in direction, and its N value is 4, at width L ₂direction has 2 water tumblers, its M value is 2.The musical instrument of rule location, its N, M numerical value has been stored in the middle of teaching system and has inputted without the need to outside; Need the musical instrument of irregular location, its N, M numerical value when initial alignment, the number of times identification of being knocked according to different directions by music signal collection terminal.

(2) at length (i.e. L ₁) coordinate interval on direction at width (i.e. L ₂) coordinate interval on direction each sounding unit coordinate in coordinate axis can be determined by coordinate interval $x=\frac{x_n+x_{n-1}}{2},$ $y=\frac{y_m+y_{m-1}}{2}.$

(3) at length (i.e. L ₁) on direction, the angle intervals of projection is at width (i.e. L ₂) projection angle on direction is spaced apart at L ₁on direction, the corresponding angle intervals Δ α of each coordinate interval Δ x, at L ₂on direction, the corresponding angle intervals Δ β of each coordinate interval Δ y.

(4) starting point at the starting point corresponding angle interval of coordinate interval, the terminal at the terminal corresponding angle interval of coordinate interval, i.e. x _ncorresponding α _n, y _mcorresponding β _m, x _n-1corresponding α _n-1, y _m-1corresponding β _m-1, the one-to-one relationship between angle and coordinate can be set up: corresponding $\mathrm{\α}=\frac{{\mathrm{\α}}_n+{\mathrm{\α}}_{n-1}}{2},$ $y=\frac{y_m+y_{m-1}}{2}$ Corresponding $\mathrm{\β}=\frac{{\mathrm{\β}}_m+{\mathrm{\β}}_{m-1}}{2}.$

The implementation of laser-marking teaching system of the present invention is described below by specific embodiment, described embodiment all can demonstrate the control that this teaching system can realize projective iteration and projection duration accurately, and the teaching of musical instrument needs to play position and playing time accurately, therefore all can find out that laser-marking teaching system of the present invention is applicable to carry out teaching to any musical instrument from embodiment.Piano has standard shape size, and the musical instrument that fixed scale sorts, there is standard pitch in sounding unit, therefore has standard shape size, and the musical instrument that fixed scale sorts, there is standard pitch in sounding unit, all can carry out teaching according to the teach mode of piano.The musical instrument be made up of water tumbler is that each sounding unit has standard pitch, but geomery and all unfixed musical instrument of scale sequence, therefore there is standard pitch in each sounding unit, but geomery and all unfixed musical instrument of scale sequence all can carry out teaching according to the teach mode of the musical instrument be made up of water tumbler.

Embodiment 1

The implementation of laser-marking teaching system of the present invention is described for piano below.Wherein said laser projection device is made up of lasing light emitter, steering wheel, plane mirror.

Piano has the musical instrument that standard shape size, fixed scale sort, there is standard pitch in sounding unit, so can adopt the built-in coordinate system of system at initial alignment.The putting position of the laser projection device that user recommends according to system places laser projection device, and the difference of the position that teaching system can be placed according to user and recommended location, carries out the offset correction of coordinate.

As shown in 13 figure, suppose that melody needs first to play key 7E, then play key 7F, music signal collection terminal sends the time series be made up of E, F point coordinate, angle, projection time length of Single Chip Microcomputer (SCM) system to.After Single Chip Microcomputer (SCM) system receives control signal, control steering wheel and drive plane mirror 2, after the instruction of C point completes, F point is turned to project, after the instruction of F point completes, Single Chip Microcomputer (SCM) system judges whether control signal terminates, if do not terminate, continue to carry out projection teaching according to time series, if control signal terminates, the teaching that projects terminates.

As shown in figure 14, the relation of piano subpoint coordinate and angle can be determined by with under type.In figure, DD ', MM ' are plane mirror normal.

The ordinate y of subpoint C (x, y), the height z at plane mirror 2 place and the pass of angle beta are: y=z × tan (2 θ), and wherein θ is laser from lasing light emitter injection and the angle of normal MM '.The horizontal ordinate x of subpoint C (x, y), the height z at plane mirror 2 place and the pass of angle [alpha] are: wherein for the angle of the laser that penetrates from lasing light emitter and normal DD '.

As shown in figure 15, correction needs to know δ _ivalue, provide two kinds of modes to obtain δ below _ivalue, δ _ifor the angle of the laser and triangle height h that are mapped to i-th key, for piano, figure intermediate cam shape is made up of laser spots and piano two ends, a is the width of key, i represents i-th key, i=0,1,2, ... .88, piano corrects can adopt following formula, and D3 is the distance that laser spots arrives piano end points, D is the length of whole fingerboard, and h is leg-of-mutton height for this reason.ξ ₁, ξ ₂for being mapped to laser and the plane included angle, keyboard place of end points.D3, ξ ₁, ξ ₁, D is known.σ _ifor the angle of the laser of directive end points and the laser of directive i-th key.These two kinds of modes are not limited only to the calculating of piano, if laser spots can with the two-end-point of musical instrument, form a triangle, just can obtain δ by these two kinds of modes _ivalue.

Method one:

H, D1, D2 can calculate according to following formula

$\frac{h}{D1}=\tan \left({\mathrm{\ξ}}_1\right)\→D1=\frac{h}{\tan \left({\mathrm{\ξ}}_1\right)}=h\×\cot \left({\mathrm{\ξ}}_1\right)$

$\frac{h}{D2}=\tan \left({\mathrm{\ξ}}_2\right)\→D1=\frac{h}{\tan \left({\mathrm{\ξ}}_2\right)}=h\×\cot \left({\mathrm{\ξ}}_2\right)$

D1+D2＝D

$h\×\cot \left({\mathrm{\ξ}}_1\right)+h\×\cot \left({\mathrm{\ξ}}_2\right)=D\→h=D\frac{D}{\cot \left({\mathrm{\ξ}}_1\right)+\cot \left({\mathrm{\ξ}}_2\right)}$

δ _ican calculate according to following formula

$(i-1)\×a+\frac{1}{2}a=(i-0.5)a$

$\tan \left({\mathrm{\δ}}_i\right)=\frac{D1-(i-0.5)a}{h}$

Method two:

δ _ican calculate according to following formula

$\frac{h}{D3}=\sin \left({\mathrm{\ξ}}_1\right)\⇔\frac{h}{\sin \left({\mathrm{\ξ}}_1\right)}=D3$

$\frac{(i-0.5)a\×\sin \left({\mathrm{\ξ}}_1\right)}{D3-(i-0.5)a\×\cos \left({\mathrm{\ξ}}_1\right)}=\tan \left({\mathrm{\σ}}_i\right)$

$\cos ({\mathrm{\σ}}_i+{\mathrm{\δ}}_i)=\frac{h}{D3}=\sin \left({\mathrm{\ξ}}_1\right)$

δ _i＝90°-ξ ₁-σ _i

Embodiment two

Below for water tumbler, the implementation of laser-marking teaching system of the present invention is described, wherein said laser projection device is made up of lasing light emitter, steering wheel, plane mirror.

As shown in figure 16, the musical instrument be made up of water tumbler is that each sounding unit has standard pitch, but geomery and all unfixed musical instrument of scale sequence, so when initial alignment, the placement location of the self-defined laser projection device of user, be that initial point sets up XOYZ space coordinates with laser projection device, then user knocks each water tumbler, the pitch of music signal collection terminal identification water tumbler, and catch the position of each water tumbler.

Drainage cup 8A before supposing to need in music playing process first to knock, then will knock rear drainage cup 8B, and music signal collection terminal sends the time series be made up of the coordinate of 8A, 8B, angle, projection time length of Single Chip Microcomputer (SCM) system to.After Single Chip Microcomputer (SCM) system receives control signal, control steering wheel and drive plane mirror 2, after 8A has indicated, 8B is turned to project, after the instruction of 8B point completes, Single Chip Microcomputer (SCM) system judges whether control signal terminates, if do not terminate, continue to carry out projection teaching according to time series, if control signal terminates, the teaching that projects terminates.

Embodiment 3

The laser projection device that this embodiment illustrates the laser projection device that the projection arrangement of laser-marking teaching system of the present invention is not limited to be made up of lasing light emitter, steering wheel, plane mirror and is made up of light deflector, driving circuit, lasing light emitter.

Laser projection device in the present embodiment comprises spherical ultrasonic motor, lasing light emitter.

Initial alignment is identical with embodiment 2 to the process of music signal with music signal collection terminal, the control of projection teaching is the sense of rotation being controlled spherical ultrasonic motor by Single Chip Microcomputer (SCM) system, then control lasing light emitter towards, change the position of projection, timer in single-chip microcomputer controls the time span of projection, based on projection arrangement highly sensitive of spherical ultrasonic motor, indicating range is large, is applicable to any occasion.

As shown in figure 17, need first to play the musical instrument such as dulcimer, piano 11 in music playing process, then will play the musical instrument such as ancient Chinese chime with 12 bells, wooden fish 14, music signal collection terminal sends the time series be made up of the coordinate of musical instrument 11, musical instrument 14, angle, projection time length of Single Chip Microcomputer (SCM) system to.After Single Chip Microcomputer (SCM) system receives control signal, control spherical ultrasonic motor 15 and drive lasing light emitter 1, after the musical instrument such as dulcimer, piano 11 has indicated, the musical instrument such as ancient Chinese chime with 12 bells, wooden fish 14 is turned to project, after the musical instrument such as ancient Chinese chime with 12 bells, wooden fish 14 has indicated, Single Chip Microcomputer (SCM) system judges whether control signal terminates, if do not terminate, continue to carry out projection teaching according to time series, if control signal terminates, the teaching that projects terminates.

Above-described embodiment is only not used in for illustration of the present invention and limits the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.

Claims (10)

1. a laser-marking musical instrument teaching system, is characterized in that comprising music signal collection terminal, Single Chip Microcomputer (SCM) system and laser projection device;

Teaching system, on the basis identified musical instrument, provides the laser projection device putting position of recommendation for regular musical instrument, after user puts according to recommended location, carry out offset correction again; For irregular musical instrument, knock each sounding unit by user, music signal collection terminal identification and catch pitch and the coordinate of each sounding unit, to determine the putting position of laser projection device; Then, regular musical instrument location adopts coordinate system built-in in teaching system; User's self-defining coordinate system during irregular musical instrument location employing initial alignment; Described music signal collection terminal gathers music signal and identifies, obtains text code, and generates control signal, by radio communication, control signal is transferred to Single Chip Microcomputer (SCM) system; Described Single Chip Microcomputer (SCM) system reception control signal, drives and controls the teaching that laser projection device realizes musical instrument; Described regular musical instrument is have the musical instrument that standard shape size, fixed scale sort, there is standard pitch in sounding unit; But described irregular musical instrument is each sounding unit standard pitch geomery and all unfixed musical instrument of scale sequence.

2. laser-marking musical instrument teaching system according to claim 1, is characterized in that described music signal collection terminal comprises computing machine and/or mobile intelligent terminal.

3. laser-marking musical instrument teaching system according to claim 2, is characterized in that described mobile intelligent terminal is for can catch external information, can carry out calculating, treatment and analysis, and can carry out the portable set of information transmission between different terminals.

4. laser-marking musical instrument teaching system according to claim 1, is characterized in that described Single Chip Microcomputer (SCM) system comprises single-chip microcomputer and bluetooth module.

5. laser-marking musical instrument teaching system according to claim 1, is characterized in that described laser projection device is made up of steering wheel, lasing light emitter and plane mirror or is made up of lasing light emitter, driving circuit, light deflector and prism.

6. laser-marking musical instrument teaching system according to claim 1, is characterized in that any device that described musical instrument comprises by bullet, dials, knocks, touching means are sounded.

7. laser-marking musical instrument teaching system according to claim 6, is characterized in that described musical instrument comprises stringed musical instrument, percussion instrument or keyboard instrument.

8. laser-marking musical instrument teaching system according to claim 7, is characterized in that described stringed musical instrument comprises harp, guitar, seven-stringed plucked instrument in some ways similar to the zither, Chinese lute, zither or bass; Described percussion instrument comprises xylophone, celesta, tubular bells, ancient Chinese chime with 12 bells, drum, gong, angle iron, cymbals, castanets or sand mallet; Described keyboard instrument comprises piano, pipe organ, accordion or mellotron.

9. the laser-marking musical instrument teaching system according to any one of claim 1 to 8, is characterized in that the teaching pattern of described laser-marking teaching system comprises beginner mode, general mode, fine mode or professional mode.

10. a teaching method for laser-marking musical instrument teaching system, is characterized in that comprising the following steps:

(1) initial alignment: teaching system, on the basis identified musical instrument, provides the laser projection device putting position of recommendation for regular musical instrument, carries out offset correction again after user puts according to recommended location; For irregular musical instrument, knock each sounding unit by user, music signal collection terminal identification and catch pitch and the coordinate of each sounding unit, to determine the putting position of laser projection device; Described regular musical instrument is have the musical instrument that standard shape size, fixed scale sort, there is standard pitch in sounding unit; But described irregular musical instrument is each sounding unit standard pitch geomery and all unfixed musical instrument of scale sequence;

(2) adopted coordinate system is determined according to the situation of initial alignment: regular musical instrument location adopts coordinate system built-in in teaching system; User's self-defining coordinate system during irregular musical instrument location employing initial alignment;

(3) music signal collection terminal gathers music signal and identifies, obtains text code, and generates control signal, by radio communication, control signal is transferred to Single Chip Microcomputer (SCM) system;

(4) Single Chip Microcomputer (SCM) system reception control signal, drives and controls the teaching that laser projection device realizes musical instrument.