Search

CN-121999742-A - Piano system with real-time variable damping function

CN121999742ACN 121999742 ACN121999742 ACN 121999742ACN-121999742-A

Abstract

The invention discloses a piano system with a real-time variable damping function in the technical field of piano parts, and aims to solve the problems of single touch feeling of an electronic piano and fixed damping of a mechanical piano. The system comprises a main control module, a sensing detection module, a power amplifier driving module and a mechanical structure module, wherein each module is integrally arranged inside a shell, the mechanical structure module comprises a key and a permanent magnet fixed on the key, the magnetic pole direction of the permanent magnet is perpendicular to the movement direction of the key, the sensing detection module is connected with the key and is used for detecting displacement information of the key, and the power amplifier driving module is provided with an electromagnetic coil which is correspondingly arranged with the permanent magnet and has an axis coincident with the permanent magnet and can drive the mechanical structure module. According to the invention, through the interaction of the electromagnetic coil and the dynamic magnetic field of the permanent magnet, the damping force can be adjusted in real time according to the key motion state, the dynamic touch change from soft touch to heavy touch of the traditional mechanical piano is accurately simulated, and the defects of single touch and fixed damping of the traditional electronic piano are overcome.

Inventors

  • WEI SHUANG
  • HE HAORAN
  • JU YI
  • LI XINGZHE
  • XU YIFEI

Assignees

  • 上海师范大学

Dates

Publication Date
20260508
Application Date
20251231

Claims (10)

  1. 1. The piano system with the real-time variable damping function is characterized by comprising a main control module, a sensing detection module, a power amplifier driving module and a mechanical structure module; The mechanical structure module comprises a key (1), a permanent magnet (3) and a shell (4), wherein the main control module, the sensing detection module, the power amplifier driving module and the mechanical structure module are all integrally arranged in the shell (4), the permanent magnet (3) is fixed on the key (1), and the magnetic pole direction of the permanent magnet (3) is perpendicular to the movement direction of the key (1); the key (1) is connected with the sensing detection module, and the sensing detection module is used for detecting displacement information of the key (1) and transmitting the displacement information to the main control module; the main control module is electrically connected with the power amplifier driving module, and the power amplifier driving module is used for receiving a control signal output by the main control module and driving the mechanical structure module; the power amplifier driving module is also provided with electromagnetic coils which are arranged corresponding to the permanent magnets (3), and the axes of the permanent magnets (3) and the electromagnetic coils are coincident.
  2. 2. The piano system with real-time variable damping function according to claim 1, characterized in that the shell (4) adopts a split structure, comprising an upper cover, a lower shell and a middle support frame, wherein the middle support frame is respectively and vertically connected with the upper cover and the lower shell, and the upper cover, the lower shell and the middle support frame together form an internal installation cavity.
  3. 3. The piano system with the real-time variable damping function according to claim 2, characterized in that fulcrum tracks (7) are integrally formed on the sides of the keys (1), fixed fulcra (8) are correspondingly arranged on the support frame, and the fulcrum tracks (7) and the fixed fulcra (8) are cooperatively arranged at the joint of the sides of the keys (1) and the middle support frame.
  4. 4. A piano system with real time variable damping function according to claim 3, characterized in that the detection end of the sensing detection module is attached to the side of the key (1); Each key (1) corresponds to a sensing detection module, and the sensing detection module is fixed on the middle support frame and is adjacent to the fixed pivot (8).
  5. 5. The piano system with real-time variable damping function according to claim 2, characterized in that the permanent magnet (3) is fixed at the center of the bottom end of each key (1), and the permanent magnet (3) is opposite to the electromagnetic coil in the lower case.
  6. 6. The piano system with real-time variable damping function of claim 5, wherein the terminal of the electromagnetic coil is electrically connected with the output terminal of the power amplifier driving module through a shielding wire.
  7. 7. A piano system with real time variable damping function according to claim 3, characterized in that the lateral array of keys (1) is distributed on the operating face of the upper cover; the top of the key (1) exceeds the surface of the upper cover, the bottom of the key extends to the internal installation cavity, and the key is connected with the middle support frame through a fulcrum track (7) and a fixed fulcrum (8).
  8. 8. The piano system with the real-time variable damping function according to claim 1, wherein the end face of the pressing end of the top of the key (1) is provided with a balancing weight clamping groove (6), and the balancing weight clamping groove (6) is internally provided with a balancing weight in a detachable mode.
  9. 9. The piano system with real-time variable damping function according to claim 1, wherein the input end of the main control module is connected with all sensing detection modules one by one through ADC pins; The output of the main control module is connected with the signal input end of the power amplifier driving module through a timer PWM output pin; the main control module is also provided with a serial communication unit which is in communication connection with an external computer soft sound source.
  10. 10. The piano system with real-time variable damping function of claim 9, wherein the power amplifier driving module comprises a PWM signal amplifying circuit, the PWM signal amplifying circuit and the master control module are integrated in the same PCB board; the input end of the PWM signal amplifying circuit is connected with the PWM output pin of the main control module, and the output end of the PWM signal amplifying circuit is connected with each electromagnetic coil through a shielding wire in a one-to-one electric connection mode.

Description

Piano system with real-time variable damping function Technical Field The invention relates to a piano system with a real-time variable damping function, and belongs to the technical field of piano parts. Background Pianos are important instruments whose key damping (touch feeling) is critical to performance expressivity. The damping of the traditional mechanical piano is determined by the physical characteristics of mechanical structures such as a string striking machine, damping parameters are fixed and cannot be adjusted in real time according to the habit or music style of players, while the traditional electronic piano adopts fixed elastic elements to simulate damping, has larger difference between touch feeling and a real mechanical piano, and lacks fine force feedback and dynamic change. In the aspect of digital application, although part of electronic pianos have a MIDI signal output function, the synergy with damping adjustment is insufficient, and accurate matching of touch sense and tone is difficult to realize. Meanwhile, key structures affecting touch sense such as key weights and fulcrum positions of the existing piano are mostly of fixed design, and operation habits of different players cannot be adapted in a personalized mode. Therefore, the prior art has obvious defects in real-time adjustability of the damping of the piano keys, personalized suitability of the touch sense and deep integration of the digital function, and a piano system which can realize real-time variable damping, personalized adjustment of the touch sense and high-efficiency digital output is needed to meet the diversified requirements of modern playing and music creation. Disclosure of Invention The invention aims to overcome the defects in the prior art, provides a piano system with a real-time variable damping function, and solves the technical problems that the traditional piano is fixed in key damping, the traditional electronic piano is single in touch sense and insufficient in digital integration, and damping real-time variable, touch sense personalized adaptation and digital audio output coordination cannot be realized. In order to solve the technical problems, the invention is realized by adopting the following technical scheme: A piano system with real-time variable damping function comprises a main control module, a sensing detection module, a power amplifier driving module and a mechanical structure module; The mechanical structure module comprises a key, a permanent magnet and a shell, wherein the main control module, the sensing detection module, the power amplifier driving module and the mechanical structure module are all integrally arranged in the shell; The key is connected with the sensing detection module, and the sensing detection module is used for detecting displacement information of the key and transmitting the displacement information to the main control module; the main control module is electrically connected with the power amplifier driving module, and the power amplifier driving module is used for receiving a control signal output by the main control module and driving the mechanical structure module; The power amplifier driving module is also provided with an electromagnetic coil which is arranged corresponding to the permanent magnet, and the permanent magnet is overlapped with the axis of the electromagnetic coil. Preferably, the shell adopts split type structure, and it includes upper cover, inferior valve and middle support frame, middle support frame respectively with upper cover and inferior valve perpendicular connection, upper cover, inferior valve and middle support constitute an internally mounted cavity jointly. Preferably, the side surface of the key is integrally formed with a fulcrum track, a fixed fulcrum is correspondingly arranged on the support frame, and the fulcrum track and the fixed fulcrum are matched and installed at the joint of the side surface of the key and the middle support frame. Preferably, the detection end of the sensing detection module is attached to the side face of the key; Each key corresponds to a sensing detection module, and the sensing detection module is fixed on the middle support frame and is adjacent to the fixed pivot. Preferably, the permanent magnet is fixed at the center position of the bottom end of each key, and the permanent magnet is opposite to the electromagnetic coil in the lower shell up and down. Preferably, the wiring terminal of the electromagnetic coil is electrically connected with the output end of the power amplifier driving module through a shielding wire. Preferably, the lateral array of keys is distributed on the operation surface of the upper cover; the top of the key exceeds the surface of the upper cover, the bottom of the key extends to the internal installation cavity, and the key is connected with the middle supporting frame through a fulcrum track and a fixed fulcrum. Preferably, the end face of the pressing end of t