Piano keyboard acting photoelectronic digital detector

Abstract

The device consists of signal collecting component connecting with piano frame and fingerboard separately. The component comprises components of light-emitting and light-receiving as well as grating which is set in between the two components and can be moved relatively with them. The two components and the grating are moved relatively following the movement of fingerboard moving relatively to the piano frame so the light signal from light-emitting component can be received by light-receiving component through grating which is moved relatively to convert operation parameter to be relevant pulse digital signals of playing strength, up and down direction, state and key playing speed for post processing by computer and circuit in order to output detection result accurately.

Description

technical field [0001] The invention relates to a musical instrument playing detection device, in particular to a detection device for piano keyboard actions. Background technique [0002] The piano playing action detection device can reflect the level of piano playing by monitoring the movement state, direction, and speed of the keys and pedals (that is, the notes played and their strength, duration, and sound stop effect), so as to guide or judge Many occasions such as piano performance, production of electronic piano keyboard or multimedia digital keyboard, and inspection of piano quality provide evidence for people. According to the applicant's understanding, the existing piano keyboard action detection devices mainly include electromagnetic induction type and reed type. The former converts the action of the keyboard into electrical signals during the playing process through the electromagnetic induction elements that are relatively fixed to the piano frame and the keys...

AI Technical Summary

Problems solved by technology

The former converts the action of the keyboard into electrical signals during the playing process through the electromagnetic induction elements that are relatively fixed to the piano frame and the keys respectively, so as to realize the detection of the keyboard action. The disadvantage is that the cost is high and it is difficult to digitally reflect the detection results; The on-off control of the two reeds, which are relatively fixed to the piano frame and the keys, respectively, during the playing process, sends out corresponding electrical signals to realize the detection of keyboard actions. The disadvantage is that the detection accuracy is poor, and it cannot fully reflect the actions of the keyboard.

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