Piezoelectric Sensor Mounting Angles for Percussion Signal Stability
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Solution Overview
Problem
Existing electronic percussion instruments using piezoelectric elements struggle to consistently generate electrical signals when hit in directions parallel to the mounting surface, leading to unstable output.
Innovation Solution
The electronic percussion instrument features piezoelectric elements mounted on inclined surfaces forming a concentric circle around the central axis of the body, allowing for stable signal conversion and output regardless of the hitting direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If piezoelectric elements are mounted on a horizontal mounting surface, then the structure is simple and easy to manufacture, but the output is unstable when vibration occurs in a direction parallel to the mounting surface
Solution Approach 1:
The patent transitions from a horizontal mounting surface to an inclined mounting surface that forms an angle θ (45°≤θ<90°) with the horizontal plane. This dimensional change in the mounting surface orientation enables the piezoelectric element to effectively detect vibrations in directions parallel to the original horizontal surface, thereby resolving the contradiction between manufacturing simplicity and output stability.
2Reliability
If piezoelectric elements are mounted on an inclined surface, then the signal output stability improves for various hitting directions, but the manufacturing complexity increases
Solution Approach 1:
The patent specifies a particular angle range θ (45°≤θ<90°) for the inclined mounting surface. By optimizing this parameter, the patent achieves effective detection of parallel vibrations while maintaining reasonable manufacturing feasibility. This parameter optimization resolves the contradiction by finding the optimal balance between performance improvement and manufacturing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration ensures that hits in various directions can be reliably converted to electrical signals, providing uniform and stable output, thereby improving the instrument's performance and usability.
Implementation Method 1
Piezoelectric elements mounted on respective mounting surfaces formed in the body and configured to convert vibration generated by a hit on the hitting surface to an electrical signal
Data Source
AI summary
An electronic percussion instrument has a body with a hitting surface that a player can hit. Piezoelectric elements are mounted on respective mounting surfaces Sa formed in the body and are configured to convert vibration generated by a hit on the hitting surface to an electrical signal. The signals have higher output characteristics in vibration in a direction perpendicular to the mounting surfaces than in vibration in a direction parallel to the mounting surfaces. The electronic percussion instrument outputs the electrical signal generated by the piezoelectric elements. The mounting surfaces are inclined from a horizontal plane to a vertical direction β toward a center of the body. The piezoelectric elements are mounted on a concentric circle at regular intervals about a central axis of the body.