Test method of vibration characteristic of violin board and special equipment thereof

Abstract

The invention discloses a test method of the vibration characteristic of a violin board and special equipment thereof. The special equipment for the test of the vibration characteristic of the violin board mainly comprises a signal generator, a power amplifier, an audio transducer, a vibration sensor, a charge amplifier, a signal conditioner, a data acquisition unit, frequency spectrum analysis software and a computer. The test method for the vibration characteristic of the violin board comprises the following steps: firstly, exciting the violin board to generate standard pure frequency sine wave vibration by the audio transducer; secondly, detecting the deformation and the displacement of the violin board by using an acceleration sensor; and finally finding out vibration sensitive points of the violin board, i.e. an acupuncture point according to a vibration signal and the vibration amplitude of an analyzing and test area of a computer frequency system. The method is improved on the traditional manual process for producing a violin, has the advantages of high sensitivity, accurate measuring speed and strong intuitionism and provides an advanced technical method and means for producing high-grade violins.

Description

technical field [0001] The invention relates to the fields of musical instrument production and acoustic quality testing, in particular to a method and special equipment for testing the vibration characteristics of a violin plate. Background technique [0002] The piano board of the violin includes the front panel, the back panel and the side panels, which together form a resonance box. The role of the piano board is to effectively convert the vibration energy of the strings into the sound energy of air vibration through the resonance mechanism. The vibration characteristics of the piano board largely determine the tone of the violin. The sound quality of the violin can be changed by changing the vibration characteristics of the piano board, so measuring the vibration characteristics of the piano board is very important for making violins, especially high-end violins. However, testing the vibration characteristics of a piano plate is not easy for two reasons. (1) When the...

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Problems solved by technology

[0005] The present invention mainly solves the problem of the lack of objective vibration characteristic testing means in the violin production process. It tries to use modern technology to make up for the physiological deficiency that people's sense of touch cannot accurately perceive the vibration of the piano board. The vibration sensing technology is applied in the design idea to accurately capture the The weak deformation of the plate surface during vibration, and then use the computer spectrum technology to quantitatively express this change

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