Chord-free harp

Abstract

The invention discloses a chord-free harp, which has the advantages of small volume, light weight and the like by replacing the traditional bijection structure with a reflecting structure, and is suitable to be purchased and used by common families and easy to promote. The chord-free harp comprises a plurality of sensing devices, a signal processing module and a loudspeaking module, wherein the sensing devices are used for sensing operating commands of a user and sending electric signals to the signal processing module; each sensing device corresponds to a scale; the signal processing module is used for receiving the signals sent by the sensing devices and deciding to generate which kind of driving information to drive the loudspeaking module by analyzing information sources; the loudspeaking module is used for generating a corresponding scale according to the driving information sent by the signal processing module; each sensing device comprises a light transmitting device and a light receiving device which are parallelly arranged; and the transmitting end of the light transmitting device and the receiving end of the light receiving device face the same direction.

Description

【Technical field】 [0001] The invention relates to the field of electronic technology, in particular to a stringless piano. 【Background technique】 [0002] As a simple and easy-to-learn musical instrument with beautiful timbre, the electronic organ has become a very popular article in daily life. The basic working principle of the electronic organ is to use electric oscillation as the excitation sound source, and then connect the electronic circuit through the keys to produce sound. Existing electronic piano also comprises a kind of laser piano except traditional touch type. The so-called laser piano is a musical instrument that uses visible laser beams as strings, and then connects sensors as keys. [0003] The touch electronic keyboard in the prior art uses electric oscillation as the excitation sound source, but the disadvantage is that the circuit is complicated and the sound is unstable. The laser piano uses laser transmitters, frequency division components, receiving...

AI Technical Summary

Problems solved by technology

[0003] The touch electronic keyboard in the prior art uses electric oscillation as the excitation sound source, but the disadvantage is that the circuit is complicated and the sound is unstable

The laser piano uses laser transmitters, frequency division components, receiving devices and electronic control circuits to realize the strings. Although the sound is more stable than the touch electronic piano, it also has its inherent shortcomings.

The disadvantage of the laser piano is that the transmitting end and the receiving end of the laser are in the way of shooting, and there must be a certain distance between them to realize the structure of the shooting. This design makes the entire laser piano take up a lot of space, which is not conducive to popularization and use.

[0004] To sum up, the laser piano of the prior art has disadvantages such as large size and heavy piano body, so it is difficult to carry out large-scale promotion, especially not suitable for entering ordinary families.

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