Fully automatic tuner shaft for winding instruments

Abstract

The invention discloses an automatic tuning harp shaft for stringed instruments. A microcomputer chip is installed in the harp shaft. International eleven unit pitches are recorded into the chip in advance by a microcomputer control program, and piano C key is taken as the standard pitch to tune the eleven unit pitches. The microcomputer chip is installed at the rear end of the interior of the harp shaft. A motor is arranged at the front end of the interior of the harp shaft and connected with a rotary shaft through a speed changer. The microcomputer collects a signal indicating that a string is loosened through an audio sensor and sounds a voice frequency decibel, and the sound is converted into signal data; comparison and analysis data are formed by the signal data and tone and voice data stored in the microcomputer chip, and sent to a drive direct-current variable-frequency motor; the direct-current variable-frequency motor is powered by a lithium battery, and drives the rotary shaft to rotate to detect accuracy of voice frequency under the control of the microcomputer chip, so that the objective of tuning is achieved; a rotary shaft locking device is locked after toning; tuning base point buttons from low key to high key are sequentially arranged on the surfaces of harp shafts of an inner string and an outer string. The automatic tuning harp shaft is applicable to various stringed instruments.

Description

Technical field [0001] The invention relates to the technical field of musical instruments, and to be precise, is a fully automatic tuning string shaft of a stringed musical instrument. Background technique [0002] At present, the two adjacent strings of all winding instruments at home and abroad have a 5 degree pitch relationship, which limits the width of the playing range of stringed instruments. At present, some improvements to the erhu are based on the structure of the erhu. Chinese patent The application number 200920015228.2 discloses a kind of "tone electronic audio-visual erhu". The utility model discloses a multi-tone electronic audio-visual erhu, which has a piano shaft, a piano shaft, a piano bow, and a piano tube; a template is set on one side of the piano tube , The other side of the piano tube is equipped with a front auxiliary piano tube, one side of the auxiliary piano tube is a sound window, there is a sound box under the auxiliary piano tube, and a speaker is ...

AI Technical Summary

Problems solved by technology

[0002] At present, the two adjacent strings of all stringed instruments at home and abroad have a difference of 5 degrees in pitch relationship, thus limiting the playing range width of stringed instruments. At present, some improvements to the erhu are all in the structure of the qin tube. Chinese patent Application No. 200920015228.2 discloses a kind of "timbre electronic audio-visual erhu". The utility model discloses a multi-timbre electronic audio-visual erhu. , the other side of the piano tube is equipped with a front auxiliary piano tube, one side of the auxiliary piano tube is a sound window, there is a speaker under the auxiliary piano tube, and a speaker is installed on the speaker; there is a piano holder under the piano tube, which has a built-in playback device, and a video on the piano bar. Display, the above-mentioned playback device is a sound pickup amplifier, a tone power amplifier circuit connected with a U disk player circuit, and the player circuit is connected with a display to form

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