CN103810989A - Electronic wind instrument - Google Patents

Abstract

The invention discloses an electronic blowpipe, which comprises a blowpipe body. A blowing mouth and control buttons are arranged on the upper end of the blowpipe body. A main control chip and an air pressure sensor are arranged in the blowpipe body. position, the main control chip is connected to the speaker signal via the signal amplification chip, and the main control chip is connected to the air pressure sensor and the control button signal; the control button includes a playing button and a tone adjustment button. The invention has the advantages of simple structure and convenient playing. The electronic blowpipe senses the air pressure blown by the player through the air pressure sensor, and emits sounds of different sound lengths. After the signal is amplified by the signal amplification chip, the sound is finally emitted by the speaker; control The keys include performance keys and tone adjustment keys; the performance keys are used for playing sounds of different notes, and the tone adjustment keys are used for adjusting basic tones.

Description

an electronic blowpipe

technical field

The present invention relates to the technical field of musical instrument manufacturing, especially to the technical field of electronic musical instrument manufacturing, and in particular to an electronic blowpipe. the

Background technique

A musical instrument, as an instrument for music performance, refers to a tool that can play a certain tone or rhythm in various ways. According to the way of playing, it can be divided into percussion instruments, plucked string instruments and wind instruments. Among them, the wind instrument is that the player blows air into the instrument to make the air vibrate to produce sound, and resonate in the cavity of the instrument to amplify the sound. The level of sound depends on the frequency of vibration, and the quality of the workmanship of a musical instrument will affect the tone and pitch. Therefore, traditional musical instruments have relatively high requirements for workmanship, and the production cycle of musical instruments is relatively long. the

An electronic musical instrument is a musical instrument that uses electronic synthesis technology or sampling technology to emit sound through electro-acoustic equipment by triggering electronic signals by the player; it uses electronic components to generate signals of corresponding frequencies to produce sounds of different pitches. the

The structure of traditional wind instruments is fixed once the production is completed; therefore, there is a defect that the original tune cannot be changed after the production is completed. Moreover, the range of traditional wind instruments can only be within 3 to 3 and a half octaves, and it is difficult to play music with a larger range. the

Contents of the invention

The technical problem to be solved by the present invention is to provide an electronic blowpipe with a simple structure, convenient playing and the ability to change the basic tone, aiming at the current state of the prior art. the

The technical solution adopted by the present invention to solve the problems of the technologies described above is:

An electronic blowpipe, comprising a blowpipe body, the upper end of the blowpipe body is provided with a blowing mouth and control buttons, wherein, a main control chip and an air pressure sensor are arranged in the blowpipe body, and the air pressure sensor is arranged at a position facing the blowing mouth. The chip is connected to the speaker signal through the signal amplification chip, and the main control chip is connected to the air pressure sensor and the control button signal. The control button includes the playing button and the tone adjustment button; Make a sound, and the tone adjustment button changes the basic tone by changing the basic frequency of the PWM square wave generated by the main control chip.

In order to optimize the above technical solutions, the specific measures taken also include:

The above-mentioned performance keys include the do key, re key, mi key, fa key, so key, la key and the key arranged on the back of the blowpipe body from top to bottom. si sound key.

The above-mentioned performance keys also include a half-tone key arranged on the back of the blowpipe body, and the half-tone key is arranged below the si sound key. the

The above-mentioned tone adjustment button is arranged on the back of the blowpipe body, which is located above the si key. the

The above-mentioned main control chip is STM32F051C8T6 chip. the

The above air pressure sensor is MD-PS002 sensor. the

The above-mentioned control buttons are all touch buttons. the

The above-mentioned blowpipe body is provided with a digital tube for displaying the basic tone and a light-emitting diode for displaying the pressing of the corresponding position control button; the digital tube and the light-emitting diode are electrically connected with the main control chip. the

The above-mentioned nixie tubes are 0.8-inch 8-segment nixie tubes. the

The lower end of the blowpipe body is expanded with a trumpet-shaped opening. the

Compared with the prior art, the electronic blowpipe of the present invention is provided with a main control chip and an air pressure sensor in the blowpipe body. Signal connection, the main control chip is connected to the air pressure sensor and the control button signal; it senses the air pressure blown by the player through the air pressure sensor, and makes sounds of different lengths, and after the signal is amplified by the signal amplification chip, the sound is finally emitted by the speaker . the

The control buttons include performance buttons and tone adjustment buttons; the performance buttons are used to play the sounds of different notes, and the tone adjustment buttons are used to adjust the basic tone, which changes the basic tone by changing the basic frequency generated by the main control chip. The pitch of the sound produced by the electronic blowpipe is determined by the PWM signals of different frequencies generated by the main control chip, and the pitch is more accurate than traditional musical instruments. the

The back of the blowpipe body is provided with a chromatic key, and the setting range of the chromatic key is further widened. the

In addition, the control buttons are all touch buttons, which greatly improves the service life and sensitivity of the buttons. the

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the rear view structure state diagram of Fig. 1;

Fig. 3 is one of the cross-sectional schematic diagrams of Fig. 1;

Fig. 4 is the second schematic cross-sectional structure diagram of Fig. 1;

Fig. 5 is a structural block diagram of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. the

The embodiment shown in Figure 1 to Figure 5,

Icon number description: blowpipe body 1, blowing mouth 11, horn-shaped opening 12, main control chip 2, air pressure sensor 3, signal amplification chip 4, horn 5, control button 6, do key 61, re key 62, mi sound Key 63, fa sound key 64, so sound key 65, la sound key 66, si sound key 67, semitone key 68, tone adjustment button 69, nixie tube 71, light emitting diode 72.

As shown in Figure 1 to Figure 5,

An electronic blowpipe of the present invention comprises a blowpipe body 1, a blowing port 11 and a control button 6 are arranged on the upper end of the blowpipe body 1, wherein a main control chip 2 and an air pressure sensor 3 are arranged in the blowpipe body 1, and the air pressure sensor 3 is arranged on the front For the position of the blowing mouth 11, the main control chip 2 is connected with the signal of the speaker 5 through the signal amplification chip 4, and the main control chip 2 is connected with the air pressure sensor 3 and the control button 6; the control button 6 includes a playing button and a tone adjustment button 69; the main control chip 2 produces a PWM square wave according to the detection value of the air pressure sensor 3 and the playing button and sounds, and the tone adjustment button 69 changes the basic tone by changing the basic frequency of the PWM square wave that the main control chip 2 produces.

In the embodiment, the playing keys include do key 61, re key 62, mi key 63, fa key 64, so key 65, and la key 66 distributed on the front of the blowpipe body 1 from top to bottom. And the si sound key 67 that is arranged on the back side of the blowpipe body 1 . the

In the embodiment, the performance keys also include a half-tone key 68 arranged on the back of the blowpipe body 1 , and the half-tone key 68 is arranged below the si sound key 67 . A half-tone scale can be added to the seven basic tones of do, re, mi, fa, so, la, and si by the half-tone key 68, thereby making the range wider. the

In the embodiment, the tone adjustment button 69 is arranged on the back of the blowpipe body 1 , which is located above the si key 67 . the

In the embodiment, the main control chip 2 is an STM32F051C8T6 chip. The STM32F051C8T6 chip has a hardware touch key detection function (TSC) that can be used to detect the control key 6 of the present invention; the modulus detection function (A/D) of the chip can be used to detect the pressure value of the air pressure sensor 3; it includes multiple high-performance The timer can be used to generate PWM signals to simulate sounds of various frequencies; 39 I/O ports can fully meet the requirements of the external components involved in the present invention; The status of key 6 changes. the

In the embodiment, the air pressure sensor 3 is an MD-PS002 sensor. the

In the embodiment, the control buttons 6 are all touch buttons. The use of touch keys can greatly improve the service life and sensitivity of the keys. the

In the embodiment, the blowpipe body 1 is provided with a digital tube 71 for displaying the basic tone and a light-emitting diode 72 for displaying the pressing of the corresponding position control button 6; the digital tube 71 and the light-emitting diode 72 are electrically connected with the main control chip 2 . When a certain control button 6 is pressed, its corresponding LED 72 will emit light to indicate that the control button 6 has been pressed. the

In the embodiment, the digital tube 71 is a 0.8-inch 8-segment digital tube. the

In the embodiment, the lower end of the blowpipe body 1 is expanded with a trumpet-shaped opening 12; the setting of the trumpet-shaped opening 12 is more conducive to the amplification and diffusion of sound. the

working principle:

The frequency of the sound determines the height of the sound. This electronic blowpipe uses the main control chip 2 to generate PWM square waves of different frequencies, and then the signal is amplified by the signal amplification chip 4, and then the sound is emitted by the speaker 5; while the main control chip 2 generates The PWM square waves of different frequencies are triggered by the player blowing air through the air pressure sensor 3 through the blowing port 11 .

The seven main tones C-D-E-F-G-A-B in the key of C respectively represent do, re, mi, fa, so, la, si in the key of C, that is, 1 to 7 in the numbered notation; in the scientific tone notation, A4 represents the middle tone la, and The frequency is 440 Hz, while A5 represents an octave up la, which has a frequency of 880 Hz, twice that of A4. The frequency between adjacent tones with the same name is twice the relationship, so to change the basic tone of the electronic blowpipe, only need to set the basic frequency of the PWM square wave generated by the main control chip 2, which is very convenient. the

Before starting to play, set the basic tone by the tone adjustment button 69, and the basic tone is cyclically switched in the C-D-E-F-G-A-B tone. Every time the tone adjustment button 69 is pressed, the basic tone changes and switches to the next basic tone. If the current basic tone is the C tone, after pressing the tone adjustment button 69 once, it will switch to the D tone. While switching, the digital tube 71 will display the current basic tone, so that the player can clearly understand the current basic tone. the

When the basic tone is determined, the basic frequency of the PWM signal generated by the main control chip 2 is determined, and the sound issued by the basic frequency is do; during the playing process, the air pressure sensor 3 senses the length of the player's blowing to determine the length of the sound. And press the playing button by the player's finger, i.e. do key 61, re key 62, mi key 63, fa key 64, so key 65, la key 66, si key 67 and half tone key 68, do, re, mi, fa, so, la, si, and do, re, mi, fa, so, la, si two octaves higher by increasing or decreasing the base frequency do, re, mi, fa, so, la, si, and do, re, mi, fa, so, la, si one octave lower, so as to realize the playing of music within 4 octaves. the

Under normal circumstances, the range of 4 octaves is sufficient for the performance of most pieces of music. As an extension, the range of the electronic blowpipe can be further increased by increasing or decreasing the frequency. Because the octave of the currently played music is actually determined by the AD value of the air pressure sensor 3 , and the sound is determined by the PWM frequency generated by the main control chip 2 . The detection value of the gas sensor 3 and the detection value of the playing button determine what sound the main control chip 2 outputs. After subtracting the standard air pressure value from the AD value of the air pressure sensor, it is divided into 4 equal parts, and a range of 4 octaves can be obtained. After subtracting the standard air pressure value from the AD value of the air pressure sensor, it is divided into 5 or 6 equal parts, and a range of 5 octaves or 6 octaves can be obtained. the

The preferred embodiment of the present invention has been illustrated, and various changes or modifications may be made by those skilled in the art without departing from the scope of the present invention. the

Claims (10)

1. An electronic blowpipe, comprising a blowpipe body (1), the upper end of the blowpipe body (1) is provided with a blowing mouth (11) and a control button (6), it is characterized in that: the inside of the blowpipe body (1) A main control chip (2) and an air pressure sensor (3) are provided, and the air pressure sensor (3) is arranged at a position facing the blowing port (11), and the main control chip (2) is passed through a signal amplification chip (4 ) is connected to the horn (5) signal, and the main control chip (2) is connected to the air pressure sensor (3) and the control button (6) signal, and the control button (6) includes a playing button and a tone adjustment button (69); Described main control chip (2) produces PWM square wave and sound according to the detection value of air pressure sensor (3) and performance button, and described tone adjustment button (69) produces by changing the PWM square wave that main control chip (2) produces. The fundamental frequency of the wave changes the fundamental pitch. 2. An electronic blowpipe according to claim 1, characterized in that: the playing keys include do key (61) and re key distributed sequentially on the front of the blowpipe body (1) from top to bottom. (62), mi sound key (63), fa sound key (64), so sound key (65), la sound key (66) and the si sound key (67) that is arranged on the back side of described blowpipe body (1). 3. A kind of electronic blowpipe according to claim 2, characterized in that: the playing button also includes a chromatic key (68) arranged on the back of the blowpipe body (1), and the chromatic key (68) Be arranged below the si sound key (67). 4. An electronic blowpipe according to claim 3, characterized in that: the tone adjustment button (69) is arranged on the back of the blowpipe body (1), above the si key (67). 5. An electronic blowpipe according to claim 4, characterized in that: said main control chip (2) is a STM32F051C8T6 chip. 6. An electronic blowpipe according to claim 5, characterized in that: the air pressure sensor (3) is an MD-PS002 sensor. 7. An electronic blowpipe according to claim 6, characterized in that: said control buttons (6) are all touch buttons. 8. An electronic blowpipe according to claim 7, characterized in that: the blowpipe body (1) is provided with a digital tube (71) for displaying the basic tone and a control button (6) for displaying the corresponding position Pressed light emitting diode (72); said digital tube (71) and light emitting diode (72) are electrically connected with said main control chip (2). 9. An electronic blowpipe according to claim 8, characterized in that: said digital tube (71) is a 0.8-inch 8-segment digital tube. 10. An electronic blowpipe according to claim 9, characterized in that: the lower end of the blowpipe body (1) is expanded with a trumpet-shaped opening (12).

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