CN2586225Y

CN2586225Y - Microcomputerized accordatura device

Info

Publication number: CN2586225Y
Application number: CN 02291702
Authority: CN
Inventors: 徐建
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-09
Filing date: 2002-12-09
Publication date: 2003-11-12
Anticipated expiration: 2012-12-09

Abstract

The utility model relates to a microcomputerized accordatura device, which comprises a single chip computer, a button connected with the single chip computer, a select switch, a horn, a crystal oscillation, a clock circuit, a reset circuit, and a power circuit. After programmed, the single chip computer outputs two ways of square waves of desired audio frequency at two I/O ports connected with the horn according to the arrangement of the select switch and the operation of the button. The horn is directly pushed, pulled, and driven the utility model obtains the desired standard voice of ideal volume is obtained in high efficiency by less power consumption. The microcomputerized accordatura device not only can emit A4 standard voice, but also can sound the standard voice of twelve average tone scale and empty chord standard voice of various stringed instruments, and can be provided with the operator schema of the tonality of the stringed instrument, A4 value standard, tone system, and button sound. The microcomputerized accordatura device has high sounding precision and complete sounding species, and can be suitable for different accordatura requirements of various instrumentalists.

Description

The micro computer pitching instrument

Affiliated technical field

The utility model relates to a kind of device of realizing with single-chip microcomputer and peripheral electronic circuitry thereof that can send the empty string standard pronunciation of A4 standard pronunciation, 12 average scale standard pronunciations and various stringed musical instrument, and above-mentioned various standard pronunciations are reference standards of various musical instrument accordatura.

Background technology

The device that extensively is used at present accordatura is accordatura pipe and tuning fork.

Accordatura pipe (also being known as pitching instrument sometimes) is the device that the through port blowing gas stream identical with mouth organ pronunciation principle drives the reed vibrates sounding, controls pitch by material, width and the thickness of control reed during making.Except A4 standard pronunciation accordatura pipe, also have 12 average scale standard pronunciation accordatura pipes, the empty string standard pronunciation accordatura pipe (as: violin 4 sound accordatura pipes, guitar 6 sound accordatura pipes) of various stringed musical instrument now on the market.Accordatura pipe making cost is lower, and price is more cheap, therefore becomes most popular accordatura device.But the error of the deviation of reed material composition and reed thickness, width when producing in batches owing to the accordatura pipe is so the pronunciation precision of most of on the market accordatura pipes is tens cents.The standard that such precision is used for accordatura is far from being enough.The accordatura pipe need blow with mouth in addition, can not satisfy the hygienic requirements that people improve day by day.

The pronunciation precision of tuning fork is higher, but a tuning fork can only send out a sound, during the sound that needs to send out a plurality of, just need be equipped with a plurality of tuning forks, and this has just increased the expense of purchase, and has brought inconvenience to carrying.And the tuning fork tone period is very short, often will compare repeatedly during beginner's accordatura, therefore needs to knock tuning fork many times, and is very inconvenient during use.

Along with development of electronic technology, the electronics pitching instrument that the digital oscillation frequency dividing circuit of a kind of usefulness is made has appearred on the market, though the pronunciation precision is higher, it can only send an A4 standard pronunciation, can not satisfy the requirement that sound sent out a plurality of by user's needs.The subsidiary pitching instrument function that existing micro computer metronome, digital CALIBRATION have, the pronunciation precision is also very high, but micro computer metronome, digital CALIBRATION function complexity, cost is higher, the vast Instrumentalist who need or not with pitching instrument with metronome and CALIBRATION can not spend big price to go to buy a micro computer metronome or a digital CALIBRATION and only uses its auxiliary function.

Summary of the invention

In order to overcome the various shortcomings of above-mentioned existing pitching instrument, the utility model provides a kind of micro computer pitching instrument, micro computer pitching instrument pronunciation precision height, can not only send out the A4 standard pronunciation, and can send out 12 average scale standard pronunciations and the empty string standard pronunciation of various stringed musical instrument, and tonality, A4 value, the rule system of the operator scheme of button pronunciation, various stringed musical instruments can be set as requested.

The technical scheme that its technical matters that solves the utility model adopts is: one group of button is connected with a plurality of I/O mouths of single-chip microcomputer with a few group selection switches, two other I/O mouth of single-chip microcomputer directly is connected with the two ends of loudspeaker respectively, and single-chip microcomputer also is connected with crystal oscillation clock circuit, reset circuit, power circuit simultaneously.Single-chip microcomputer after the programming is according to the setting of these a few group selection switches and the operation of button, at the square wave of the opposite required audio frequency of two phase places of two I/O mouth output that connect loudspeaker.A few group selection switches can be provided with operator scheme, A4 value, pronunciation kind, the tonality of stringed musical instrument, the rule system of button pronunciation respectively.Single-chip microcomputer directly drives loudspeaker with push pull mode, has improved phonation efficiency, just can obtain satisfied volume with very little electric current.Single-chip microcomputer adopts the crystal oscillation clock circuit, has guaranteed the high precision of pronunciation.

The beneficial effects of the utility model are, pronunciation precision height, operator scheme, A4 value, the tonality of stringed musical instrument, the rule system of various pronunciation kinds, button pronunciation can be set according to user's needs, can satisfy all requirements of all pitching instrument users, and the utility model circuit is simple, and power consumption is little, can use button cell, be convenient to the miniaturization of products, the user is carried easily.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

MCU is a single-chip microcomputer among the figure, and SPK is loudspeaker, and SW is a button, and K1, K2, K3, K4 are selector switch, and OSC is the crystal oscillation clock circuit, and RST is a reset circuit, and PWR is a power circuit.

Fig. 2 is the anti-phase oscillogram of recommending that single-chip microcomputer directly drives two I/O mouth outputs of loudspeaker.

Vpc0, Vpc1 are the current potentials of two I/O mouths of single-chip microcomputer among the figure, and VDD is the supply voltage of single-chip microcomputer, also are the maximum potentials that the I/O mouth can be exported, and t is the time, and T is the cycle of square wave.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

In Fig. 1, button (SW) is connected with single-chip microcomputer (MCU) I/O mouth, selector switch (K1, K2, K3, K4) is connected with single-chip microcomputer (MCU) I/O mouth, loudspeaker (SPK) two ends are connected with single-chip microcomputer (MCU) I/O mouth, and single-chip microcomputer (MCU) also is connected with crystal oscillation clock circuit (OSC), reset circuit (RST), power circuit (PWR) simultaneously.Single-chip microcomputer after the programming reads in the break-make situation of selector switch (K1, K2, K3, K4) and the operating conditions of button (SW), according to these situations, in the square wave (see figure 2) that connects the opposite required audio frequency of two I/O mouth output of loudspeaker (SPK) two-way phase place.At present general single-chip microcomputer all has the I/O mouth that possesses the 20mA current driving ability, so directly recommend driving loudspeaker (SPK) with two I/O mouths, can obtain desirable volume with less current.Loudspeaker (SPK) should be selected the high resistant loudspeaker for use, and the electric current that the resistance of adjusting it makes it is between 10---20mA.

The kind of the break-make encoding setting decision pronunciation of each switch contact K11 in the selector switch (K1), K12, K13, K14, K15, K16, K17: A4 standard pronunciation, 12 average scale standard pronunciations, the empty string standard pronunciation of various stringed musical instrument.When sending out stringed musical instrument sky string standard pronunciation various, the break-make encoding setting of each switch contact K21, K22 in the selector switch (K2), K23, K24, K25, K26, K27 determines the tonality of each stringed musical instrument, D as urheen transfers, C transfers, and the D of Zheng transfers, G transfers, C transfers, F transfers, bB transfers, bE transfers.When sending out 12 average scale standard pronunciations, when switch contact K21 disconnects, send out 7 sound diatonic scale standard pronunciation C, D, E, F, G, A, B, during switch contact K21 conducting, chromatic half-tone bD, bE, #F, bA, bB.The break-make encoding setting of each switch contact K31, K32 in the selector switch (K3), K33, K34, K35, K36, K37 decision A4 value standard: 430Hz～～a round values in the 450Hz scope; the international standard of A4 value is 440Hz; but in the different nationalities area, different musical instrument, same musical instrument be when different seasons, different musical form; people can do different adjustment with traditional habit with the A4 value according to the sensation of oneself usually, and are musicogenic to strengthen.The break-make encoding setting decision rule system of selector switch (K4) middle switch contact K41, K42, K43, K44, K45 is restrained as twelve-tone equal temperament, five degree interpromoting relation in five elements systems, pure rule, three minutes profit and loss rules, golden mean of the Confucian school whole tones.The operator scheme and the sound producing pattern of the break-make encoding setting of K46, K47 decision button (SW) are as singly-bound single-tone pattern (only going out a kind of sound by a key), singly-bound multitone pattern (by a key whenever by once successively going out a plurality of sounds in sequence).

Above-mentioned selector switch can be used various toggle switches, in order to reduce cost, dwindle the volume of product, also can directly use bonding line, resistance on PCB, connect the on-off function that solder joint is realized these each switch contacts of selector switch.

The single-chip microcomputer of a lot of models can both be applicable to the technical solution of the utility model, so the utility model does not specify the model of single-chip microcomputer (MCU).Because the type selecting of single-chip microcomputer (MCU) and power circuit (PWR), reset circuit (RST), the crystal oscillation clock circuit (OSC) of single-chip microcomputer (MCU) are known technologies, so this instructions is just no longer described.

Claims

1, a kind of micro computer pitching instrument, comprise: single-chip microcomputer (MCU), button (SW), selector switch (K1), selector switch (K2), selector switch (K3), selector switch (K4), loudspeaker (SPK), crystal oscillation clock circuit (OSC), reset circuit (RST), power circuit (PWR), it is characterized in that: button (SW), selector switch (K1), selector switch (K2), selector switch (K3), selector switch (K4) are connected with a plurality of I/O mouths of single-chip microcomputer (MCU), and two I/O mouths of single-chip microcomputer (MCU) directly are connected with the two ends of loudspeaker (SPK).

2, micro computer pitching instrument according to claim 1 is characterized in that: button (SW) comprises single button SW1, SW2, SW3, SW4, SW5, SW6, SW7.

3, micro computer pitching instrument according to claim 1 is characterized in that: selector switch (K1) comprises switch contact K11, K12, K13, K14, K15, K16, K17.

4, micro computer pitching instrument according to claim 1 is characterized in that: selector switch (K2) comprises switch contact K21, K22, K23, K24, K25, K26, K27.

5, micro computer pitching instrument according to claim 1 is characterized in that: selector switch (K3) comprises switch contact K31, K32, K33, K34, K35, K36, K37.

6, micro computer pitching instrument according to claim 1 is characterized in that: selector switch (K4) comprises switch contact K41, K42, K43, K44, K45, K46, K47.