Intelligent electroacoustic dulcimer

Abstract

The invention relates to the field of musical instruments, and particularly discloses an intelligent electroacoustic dulcimer which comprises a dulcimer body. A plurality of piezoelectric sensors which are installed at the positions of knocking points on the dulcimer body and are used for sensing bamboo hammer knocking and generating electric signals; the internal chip is connected with the piezoelectric sensor and is used for receiving and processing the electric signal; the sounder is connected with the internal chip and is used for making a sound according to the processed signal; the display screen is installed on the dulcimer body and used for displaying the dulcimer type, the music score and the dynamic teaching auxiliary information; according to the invention, the combination of the PVDF film piezoelectric sensor and the DSP is adopted, so that the signal acquisition precision and the tone reduction degree are greatly improved, and the high-fidelity digital reproduction of the tone of the traditional dulcimer is realized; the unique trapezoidal dulcimer body design is combined with the modular function system, so that the instrument not only keeps the playing hand feeling of a traditional dulcimer, but also has abundant functions of a modern electronic instrument, such as multi-tone switching, automatic accompaniment and the like, and the playing expressive force is greatly expanded.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of musical instruments, and particularly relates to an intelligent electric sound piano. BACKGROUND

[0002] As a traditional Chinese plucked string instrument, the piano has a long history and unique tonal characteristics. The traditional piano produces sound by striking the strings with the hammer, and has a wide range and bright tone, playing an important role in the performance of national music. With the development of electronic music technology, electric sound pianos have gradually emerged. The basic principle is to collect vibration signals through sensors, process them through circuits, and then produce sound through speakers. In the prior art, piezoelectric sensors are widely used in instrument pickup due to their high sensitivity and wide frequency response characteristics. PVDF (polyvinylidene fluoride) film piezoelectric material is particularly suitable for collecting vibration signals of stringed instruments due to its flexibility and good acoustic coupling characteristics.

[0003] In terms of digital signal processing, modern electronic musical instruments generally use DSP (digital signal processor) for real-time audio processing. Through physical modeling algorithms, the tonal characteristics of traditional musical instruments can be simulated more realistically. In terms of teaching assistance systems, existing electronic musical instruments mostly use LED indicator lights or displays to provide performance guidance, and some products have achieved linkage with MIDI music scores. However, existing electric sound pianos generally have the following defects: the integration of traditional design and electronic functions is insufficient, either conservatively retaining traditional structures to limit the expansion of electronic functions, or excessively electronic to lose the traditional playing feel; at the same time, the intelligence level of the teaching system of existing products is limited, making it difficult to achieve accurate tone guidance and personalized learning guidance.

[0004] This technical defect directly affects the performance and teaching practicality of electric sound pianos, and restricts the modernization development of traditional national musical instruments. The present application is an innovative solution to these problems. SUMMARY

[0005] To solve the above technical problems, the present application provides an intelligent electric sound piano to solve the problem of insufficient integration of traditional design and electronic functions and limited intelligence level of the teaching system in the prior art.

[0006] The intelligent electric sound piano comprises:

[0007] a piano body;

[0008] a plurality of piezoelectric sensors installed at the striking point positions on the piano body for sensing hammer strikes and generating electrical signals;

[0009] an internal chip connected to the piezoelectric sensors for receiving and processing electrical signals;

[0010] Sound generator, connected with the internal chip, for emitting sound according to the processed signal;

[0011] Display screen, installed on the piano body, for displaying the piano type, music score and dynamic teaching auxiliary information;

[0012] Light prompting system, arranged at the striking point position, for displaying phonemes and teaching prompts through light.

[0013] Preferably, the piano body adopts a trapezoidal structure.

[0014] Preferably, the piano body further comprises:

[0015] Sound-off pedal, connected with the internal chip, for controlling the sound-off function;

[0016] Hand sound-off function module, for realizing sound-off effect through manual operation.

[0017] Preferably, the internal chip further comprises the following function modules:

[0018] Multi-piano sound source switching module, for switching the timbre of different Chinese and foreign pianos;

[0019] Pitch self-defining module, for individually adjusting the pitch and loudness of each phoneme;

[0020] Metronome module, supporting the beat function independently and following the music, and with human voice prompt;

[0021] Chord preset module, supporting one-key chord function;

[0022] Multi-track sampling cycle module, for realizing automatic accompaniment function;

[0023] MIDI music score reading module, for reading and displaying MIDI format music score.

[0024] Preferably, the piano body further comprises:

[0025] Semitone-whole tone glissando function module, for realizing glissando effect through pressing or roller operation;

[0026] Long-press automatic wheel sound function module, for automatically generating wheel sound effect when long-pressing.

[0027] Preferably, the light prompting system displays foreign piano phonemes through light conversion of different positions, and provides high-light striking phoneme prompt in cooperation with the intelligent teaching program.

[0028] A control system of an intelligent electric acoustic piano, comprising:

[0029] Signal acquisition unit, for acquiring striking signal through piezoelectric sensor;

[0030] signal processing unit for converting the collected signals into sound source data;

[0031] function control unit for implementing timbre switching, chord preset, metronome, glissando and wheel sound functions;

[0032] display control unit for controlling the output of the display screen and the light prompting system;

[0033] user interaction unit for receiving input signals of the sound production pedal and the manual sound production function.

[0034] Preferably, the function control unit further comprises:

[0035] teaching assistance module for providing dynamic teaching guidance through the display screen and the light prompting system;

[0036] MIDI analysis module for analyzing and executing MIDI music score instructions.

[0037] Preferably, the user interaction unit further supports adjusting the pitch, loudness and function settings through the touch screen or physical buttons.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] By adopting the combination of the PVDF thin film piezoelectric sensor and the DSP processor, the signal collection accuracy and the timbre restoration degree are greatly improved, and the high-fidelity digital reproduction of the traditional piano timbre is realized; the unique trapezoidal piano body design is combined with the modular function system, so that the musical instrument not only retains the playing feeling of the traditional piano, but also has the rich functions of modern electronic musical instruments, such as multi-timbre switching, automatic accompaniment, etc., greatly expanding the performance expressiveness.

[0040] Through the linkage of the light prompting system and the intelligent teaching program, the learning process is more intuitive and efficient, and the entry threshold of beginners is significantly reduced. The integrated MIDI analysis and teaching assistance functions in the control system enable the performer to easily realize automatic music score performance and real-time guidance, providing a new technical means for music education. Through hardware optimization and algorithm innovation, the whole system makes the traditional national musical instrument full of new vitality, and provides technical support for the inheritance and development of national music. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a schematic diagram of the overall structure of the present application;

[0042] Figure 2 is a schematic diagram of the system of the present application. DETAILED DESCRIPTION

[0043] With reference to the accompanying drawings: clear and complete description of the technical solutions in the embodiments of the present application will be described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of the present application.

[0044] As shown in Figure 1 :

[0045] Embodiment one: the present application provides an intelligent electro-acoustic piano, comprising:

[0046] piano body 1;

[0047] a plurality of piezoelectric sensors 2, the piezoelectric sensor 2 adopts PVDF film material, the sensor array is arranged according to the tone position, each tone area corresponds to a group of sensors, which ensures the signal acquisition accuracy, is installed at the knocking point position on the piano body 1, and is used for sensing the knocking of the piano bamboo and generating an electric signal;

[0048] internal chip, the internal chip adopts DSP processor, and its signal processing flow is as follows:

[0049] signal amplification:

[0050]

[0051] Among them Programmable gain.

[0052] AD conversion: sampling rate , quantization bit number .

[0053] timbre synthesis: physical modeling algorithm is adopted, and its transfer function is:

[0054]

[0055] Among them Timbre parameters.

[0056] The internal chip is connected with the piezoelectric sensor 2, which is used for receiving and processing electric signals;

[0057] Sound generator, connected with the internal chip, used for emitting sound according to the processed signal;

[0058] Display screen 3, installed on the piano body 1, used for displaying piano type, music score and dynamic teaching auxiliary information;

[0059] Light prompting system, arranged at the knocking point position, used for displaying tone position and teaching prompt through light;

[0060] The light adopts RGBLED, and its brightness With drive current The relationship is:

[0061]

[0062] in For luminous efficiency. The light color is dynamically adjusted according to the pitch, for example:

[0063] C tone: Red (R=255,G=0,B=0);

[0064] D: Green (R=0, G=255, B=0).

[0065] As described above, the core structure of this intelligent electroacoustic dulcimer includes the dulcimer body 1 and key functional components. Several piezoelectric sensors 2 are installed on the dulcimer body 1. These sensors are made of PVDF thin film material and arranged in an array according to pitch, with one set of sensors corresponding to each pitch range to ensure high-precision signal acquisition. The internal chip uses a DSP processor to process the electrical signal through signal amplification, AD conversion (sampling rate ≥ 44.1kHz, quantization bit depth N=24), and timbre synthesis (based on physical modeling algorithms), ultimately outputting sound through the sound generator. The display screen 3 and the lighting system work together. The lights use RGB LEDs, whose brightness is proportional to the driving current and changes color dynamically to indicate the pitch, such as red for C and green for D, providing an intuitive teaching aid function.

[0066] Furthermore, this intelligent electro-acoustic dulcimer achieves high-fidelity tone reproduction and intelligent interaction through internal chip algorithm optimization and hardware coordination. The light prompt system not only provides pitch guidance but also highlights target striking points according to the teaching program, improving learning efficiency. The array design of the piezoelectric sensors ensures the sensitivity and accuracy of signal acquisition, while the real-time signal processing capability of the DSP processor guarantees smooth performance and sound quality. The overall design integrates traditional dulcimer playing habits with modern intelligent technology, demonstrating high practicality and innovation.

[0067] Example 2: This example is basically the same as the previous example, except that the body of the dulcimer 1 adopts the trapezoidal structure of the traditional Chinese dulcimer.

[0068] Specifically, it also includes:

[0069] The damper pedal, connected to an internal chip, is used to control the damping function;

[0070] The damper pedal uses a Hall sensor to detect pedal displacement. Attenuation coefficient of sound damping effect The calculation formula is:

[0071]

[0072] in is the attenuation constant.

[0073] The manual damping function module is used to achieve the damping effect through manual operation.

[0074] Specifically, the internal chip also includes the following functional modules:

[0075] A multi-instrument sound source switching module is used to switch the timbre of different Chinese and foreign dulcimers;

[0076] The pitch customization module allows for individual adjustment of the pitch and loudness of each note;

[0077] The metronome module supports independent and music-following beat functions, and includes voice prompts.

[0078] The chord preset module supports one-click chord functionality;

[0079] A multi-track sampling loop module is used to implement automatic accompaniment functionality;

[0080] The MIDI sheet music reading module is used to read and display sheet music in MIDI format.

[0081] Specifically, it also includes:

[0082] The semitone-whole tone glissando function module allows for glissando effects to be achieved through pressing or scrolling.

[0083] Among them, the gliding sound: pressure is detected by a press sensor. Glissando speed for:

[0084]

[0085] Wheel tone: Long press duration Time-triggered, cycle frequency for:

[0086]

[0087] in This is the wheel tone gain coefficient;

[0088] The long press automatic tone wheel function module is used to automatically generate tone wheel effects when pressed for a long time.

[0089] Specifically, the light prompting system displays the foreign dulcimer pitches by switching lights at different positions, and provides highlighted striking pitch prompts in conjunction with the intelligent teaching program.

[0090] As shown above, the dulcimer body 1 adopts the trapezoidal structure of the traditional Chinese dulcimer and adds a damper pedal and a manual damping function module. The damper pedal uses a Hall sensor to detect displacement, and its attenuation effect is precisely controlled by a formula. The internal chip further integrates modules such as multi-instrument source switching, pitch customization, intelligent metronome, chord preset, multi-track sampling loop, and MIDI score reading, realizing a comprehensive upgrade of the performance functions.

[0091] In terms of performance control, this embodiment adds a semitone-whole tone glissando function module and a long-press automatic tremolo function module. The glissando effect is detected by a pressure sensor, and its rate v is proportional to the pressing force P; the tremolo function is triggered when the long press time t ≥ 0.5s, and the frequency f changes with the pressing time. The light prompt system displays different dulcimer positions by dynamically changing the light position and is linked with the intelligent teaching program to realize a high-brightness striking prompt function, significantly improving the performance guidance effect.

[0092] like Figure 2 As shown:

[0093] Example 3: A control system for an intelligent electro-acoustic dulcimer, comprising:

[0094] A signal acquisition unit is used to acquire the impact signal through the piezoelectric sensor 2;

[0095] The signal processing unit is used to convert the acquired signal into sound source data;

[0096] The function control unit is used to realize the functions of tone switching, chord preset, metronome, glissando and tremolo;

[0097] The display control unit is used to control the output of the display screen 3 and the light prompt system;

[0098] The user interaction unit is used to receive input signals from the damper pedal and the manual damper function.

[0099] Specifically, the functional control unit also includes:

[0100] The teaching support module is used to provide dynamic teaching guidance through the display screen 3 and the light prompt system;

[0101] The MIDI parsing module is used to parse and execute MIDI music score instructions.

[0102] Specifically, the user interaction unit also supports adjusting pitch, loudness, and function settings via touchscreen or physical buttons.

[0103] As can be seen from the above, this system achieves precise performance control through the collaborative work of multiple units. The signal acquisition unit uses piezoelectric sensor 2 to capture percussion signals in real time. After being converted into high-quality sound source data by the signal processing unit, the function control unit realizes various performance functions such as timbre switching, chord preset, and metronome. The display control unit drives the display screen 3 and the light prompt system to provide users with intuitive visual feedback. The user interaction unit receives the performer's control commands through the damper pedal and hand damper functions.

[0104] This control system features enhanced teaching support capabilities. Its function control unit integrates a teaching support module and a MIDI parsing module, providing dynamic teaching guidance via display screen 3 and parsing and executing MIDI sheet music commands. The user interaction unit further expands the operation methods, supporting real-time adjustment of parameters such as pitch and loudness via touchscreen or physical buttons, making performance control more flexible and convenient. Through deep integration of hardware and software, the entire system achieves a perfect fusion of traditional dulcimer playing and modern intelligent technology.

[0105] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made by those skilled in the art to the above embodiments within the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent electroacoustic dulcimer, characterized in that, include: Yangqin body (1); Several piezoelectric sensors (2) are installed at the striking point on the body of the dulcimer (1) to sense the striking of the dulcimer bamboo and generate electrical signals; An internal chip, connected to a piezoelectric sensor (2), is used to receive and process electrical signals; The sound generator, connected to an internal chip, is used to produce sound based on the processed signal; The display screen (3) is installed on the dulcimer body (1) and is used to display the instrument type, musical score and dynamic teaching aid information; The light prompt system is set at the striking point to display the pitch and teaching prompts through lights.

2. The intelligent electroacoustic dulcimer as described in claim 1, characterized in that, The dulcimer body (1) adopts a trapezoidal structure.

3. The intelligent electroacoustic dulcimer as described in claim 1, characterized in that, Also includes: The damper pedal, connected to an internal chip, is used to control the damping function; The manual damping function module is used to achieve the damping effect through manual operation.

4. The intelligent electroacoustic dulcimer as described in claim 1, characterized in that, The internal chip also includes the following functional modules: A multi-instrument sound source switching module is used to switch the timbre of different Chinese and foreign dulcimers; The pitch customization module allows for individual adjustment of the pitch and loudness of each note; The metronome module supports independent and music-following beat functions, and includes voice prompts. The chord preset module supports one-click chord functionality; A multi-track sampling loop module is used to implement automatic accompaniment functionality; The MIDI sheet music reading module is used to read and display sheet music in MIDI format.

5. The intelligent electroacoustic dulcimer as described in claim 1, characterized in that, Also includes: The semitone-whole tone glissando function module allows for glissando effects to be achieved through pressing or scrolling. The long press automatic tone wheel function module is used to automatically generate tone wheel effects when pressed for a long time.

6. The intelligent electroacoustic dulcimer as described in claim 1, characterized in that, The lighting system displays the positions of foreign dulcimer notes by changing the lights in different locations, and provides highlighted striking note prompts in conjunction with the intelligent teaching program.

7. A control system for an intelligent electroacoustic dulcimer, characterized in that, include: A signal acquisition unit is used to acquire the impact signal through a piezoelectric sensor (2); The signal processing unit is used to convert the acquired signal into sound source data; The function control unit is used to realize the functions of tone switching, chord preset, metronome, glissando and tremolo; The display control unit is used to control the output of the display screen (3) and the light prompting system; The user interaction unit is used to receive input signals from the damper pedal and the manual damper function.

8. The intelligent electroacoustic dulcimer as described in claim 7, characterized in that, The functional control unit also includes: A teaching support module is used to provide dynamic teaching guidance through a display screen (3) and a light prompting system; The MIDI parsing module is used to parse and execute MIDI music score instructions.

9. The intelligent electroacoustic dulcimer as described in claim 7, characterized in that, The user interaction unit also supports adjusting pitch, loudness, and function settings via touchscreen or physical buttons.

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