A device and method for detecting key parameters of a piano

By using a key-by-key parameter detection device independent of the piano itself, multi-dimensional data acquisition and modeling are achieved, generating personalized response models and compensation parameter sets. This solves the problems of individual differences in pianos and measurement errors, and improves pedal control accuracy and pitch maintenance efficiency.

CN122306397APending Publication Date: 2026-06-30刘晋恺
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
刘晋恺
Filing Date
2026-04-21
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies cannot effectively address the differences in mechanical response and acoustic characteristics caused by individual differences in pianos. Furthermore, portable measuring devices have large measurement errors, cannot generate personalized parameter sets, lack sufficient pedal control precision, and lack systematic support for pitch maintenance.

Method used

A key parameter detection device independent of the piano body is provided, including a key detection unit, a pedal detection unit, a data acquisition and processing module, and a parameter generation module. Through multi-dimensional data acquisition and fitting modeling, a personalized response model and a compensation parameter set are generated, and the correlation between pedal travel and key acoustic effect is established.

Benefits of technology

It enables independent, portable multi-dimensional response data acquisition for pianos, generates precise performance compensation and pitch compensation parameter sets, supports precise control of external playing devices and systematic data support for tuning devices, eliminates measurement errors, and improves the realism of performance and the efficiency of pitch maintenance.

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Abstract

This invention discloses a key-by-key parameter detection device and method for pianos, belonging to the field of intelligent musical instruments and automated measurement technology. The device includes a key detection unit, a pedal detection unit, a data acquisition and processing module, and a parameter generation module. The key detection unit is detachably installed above the keys, integrating an array-type pressure sensing unit, a displacement sensor, and an acoustic response acquisition element to achieve synchronous acquisition of force distribution, key displacement, and sound loudness. The data acquisition and processing module has a built-in posture sensor to perform angle compensation correction on the displacement data to eliminate measurement errors introduced by placement tilt. The pedal detection unit works in conjunction with the key detection unit at different travel positions to establish a three-dimensional mapping relationship between pedal travel depth, key number, and acoustic sustain duration. The parameter generation module establishes an excitation response transmission relationship for each key based on the measurement data, extracts the minimum effective trigger threshold and saturation excitation threshold, and generates a personalized parameter set covering performance compensation parameters and intonation compensation parameters. This invention is independent of the piano body, portable, and can provide precise force, timing, and pedal control data for external automatic playing devices with a single measurement, while also providing systematic full-keyboard intonation data support for tuning and maintenance.
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