Rod-Shaped Percussion Sensor Uniformity
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Solution Overview
Problem
Existing rod-shaped electronic percussion instruments face challenges in achieving uniform detection sensitivity across different striking positions due to variations in detection sensitivity for higher-order vibrations, particularly for second-order vibrations.
Innovation Solution
The solution involves a rod-shaped percussion instrument with two sensors disposed on a plate-shaped member, positioned at specific distances from the center line, which are connected to combine their detection signals, improving sensitivity uniformity by considering the vibration modes and frequencies of the striking surface. The sensors are placed between ½ and ¾ of the distance from the center line to the end of the plate-shaped member, and optionally between ½ and ⅔, to enhance detection accuracy and eliminate time differences in sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple piezoelectric elements are disposed at the anti-node positions of each higher-harmonic-vibration, then the detection capability for different vibration modes is improved, but the detection sensitivity becomes non-uniform across different vibration orders
Solution Approach 1:
The striking surface is divided into multiple striking areas, with at least one piezoelectric element disposed in each striking area. This segmentation ensures that vibrations from different locations and vibration modes are captured uniformly, resolving the non-uniform detection sensitivity issue while maintaining high measurement precision across all vibration orders.
2Measurement precision
If piezoelectric elements are disposed at specific anti-node positions, then detection precision for particular vibration modes is improved, but the overall detection uniformity across the striking surface deteriorates
Solution Approach 1:
Each striking area is equipped with piezoelectric elements positioned to detect local vibrations effectively. This local quality approach ensures that each region contributes uniformly to the overall detection, achieving both high detection precision and uniformity across the entire striking surface without complex sensor arrangements.
3Adaptability or versatility
If sensors are placed to detect higher-order vibrations, then the detection capability for complex vibration patterns is improved, but the detection sensitivity for second-order vibrations becomes inferior
Solution Approach 1:
The striking surface is segmented into multiple areas with piezoelectric elements in each, ensuring that second-order vibrations (which have nodes and anti-nodes across the surface) are detected uniformly. This segmentation maintains high detection sensitivity for second-order vibrations while preserving the capability to detect higher-order vibration patterns.
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 simplifies the sensing process, enhances detection sensitivity uniformity, and reduces costs by ensuring consistent detection across the striking surface, with improved accuracy and stability in sensing the struck position.
Implementation Method 1
the electronic percussion instrument detects a vibration due to the striking by a vibration sensor, e.g. piezoelectric element
Implementation Method 2
a plate-shaped member, which is made of a hard material in a substantially rectangular shape, is elastically supported by an inner circumference side of the sidewall part
Data Source
AI summary
A rod-shaped electronic percussion instrument is provided. A rod-shaped percussion instrument, which has a striking surface made of an elastic material in a substantially rectangular shape when viewed from above, is characterized in including: a plate-shaped member, which is made of a hard material in a substantially rectangular shape and is elastically supported by a position facing a bottom surface side of the striking surface; and two sensors, which are disposed on a surface side of the plate-shaped member and detect a vibration due to striking on the striking surface, wherein the two sensors are connected to electrically combine detection signals detected by the sensors and output the same.