Unmodified non-contact detection device for piano keyboard state of clavier

Abstract

The invention relates to an unmodified non-contact detection device for piano keyboard state of a clavier. The device comprises a group of reflection type optical couplers (2) serving as detection units and a signal processing integrated circuit. The device is characterized in that: a main structure (1) is of a thin strip shape, and is vertically hung above the external surface bottom of a piano keyboard by taking brackets (6 and 7) at two ends as support points; the detection units (2) are not staggered or contacted with key bodies and linkage components; and the device can be arranged on a musical instrument without fixedly installing any auxiliary components inside and outside the musical instrument, without demounting or modifying the musical instrument and without influencing the original physical quality and sound quality of the musical instrument, and the device can be placed or demounted at any time according to needs. In combination with matched computer software, the device can real-time and accurately record the sequence of phonetic symbols played by the clavier.

Description

technical field [0001] The invention relates to a device for detecting the key movement state of keyboard musical instruments in a non-retrofitting and non-contact manner. When configuring and using the device on a keyboard musical instrument, there is no need to contact the keys and linkage parts of the musical instrument, no need to fix any auxiliary devices inside and outside the musical instrument, and no need to disassemble or refit the musical instrument. This device, combined with supporting software, can be used to accurately quantify and evaluate the performance accuracy of musical instrument players or score, guide and supervise learners' fingering, help practitioners correct wrong sounds and wrong fingerings, and make the performance of players Note sequences can be accurately recorded, or recorded as MIDI music, played back through a computer or MIDI equipment, and can also be used to test the limit vibration frequency of the keys of keyboard instruments. Backgro...

AI Technical Summary

Problems solved by technology

[0003] The common feature of the methods used in these devices is that the original musical instrument must be disassembled, and auxiliary induction devices must be installed inside the musical instrument to refit the original musical instrument to varying degrees. It can only be carried out, and musical instrument users cannot install or remove conveniently and quickly according to their own needs.

Second, installing any device or modifying any part in the internal space of the musical instrument or on the linkage parts cannot guarantee that the precious and exquisite musical instrument will not be damaged at all, and may destroy the original physical integrity of the musical instrument

Third, because the internal space of the musical instrument is generally the resonance cavity of the musical instrument, it may also affect the original sound quality of the musical instrument

Fourth, the techniques and methods used are relatively complicated, and the adjustment is relatively complicated, and it is not easy to calibrate

Fifth, due to the scattered installation of auxiliary devices in the musical instrument, the device cannot be independent of the musical instrument and form a self-contained system, which is difficult to install and maintain, so it is not easy to popularize and apply

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