Electronic Percussion Pad Weight Inertial Force Strike Detection
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Solution Overview
Problem
Existing electronic percussion instruments face challenges in accurately detecting strike positions due to the deformation of rubber covers over pressure sensors, which can lead to incorrect outputs, especially during weak strikes, as the sensors require a certain thickness and hardness to operate stably.
Innovation Solution
The implementation of a sheet-like pressure sensor on the back surface of an electronic percussion instrument's pad, where a weight portion with an elastic material is used to generate an inertial force that presses the pressure sensor, ensuring detection accuracy even during weak strikes, and a non-adhesive connection to prevent adhesion-related sensitivity reductions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber cover is used to cover the pressure sensor, then the pressure sensor can operate stably, but the detection accuracy for weak strikes deteriorates
Solution Approach 1:
The pressure sensor system is segmented into multiple functional layers: the rubber cover layer for protection and stability, the pressure sensor layer for detection, and the weight portion layer for enhancing strike response. This segmentation allows each layer to perform its specific function optimally without interfering with others.
Solution Approach 2:
The system uses composite material structure combining rubber (for elasticity and protection), pressure-sensitive material (for detection), and weight material (for inertial force generation). This composite approach leverages the advantages of each material to achieve both stability and sensitivity.
2Reliability
If the rubber cover has certain thickness and hardness for stable operation, then the pressure sensor stability improves, but the detection sensitivity for weak strikes worsens
Solution Approach 1:
A weight portion is introduced as a counterbalancing element that generates inertial force during strikes. This weight portion compensates for the damping effect of the thick rubber cover, ensuring that even weak strikes produce sufficient force to deform the rubber cover and activate the pressure sensor.
Solution Approach 2:
The weight portion is pre-positioned on the pressure sensor in a ready state, so that when a strike occurs, the inertial force is immediately generated without delay. This preliminary positioning ensures rapid response to weak strikes while maintaining sensor stability.
3Reliability
If the weight portion is made adhesive to the pressure sensor, then the connection stability improves, but the sensor sensitivity deteriorates
Solution Approach 1:
An adhesive layer is introduced as an intermediary between the weight portion and the pressure sensor. This thin adhesive layer provides mechanical connection stability while maintaining the pressure sensor's sensitivity by allowing controlled deformation under strike force.
Solution Approach 2:
The adhesive connection is designed as a thin, flexible interface that can transmit both mechanical bonding forces and pressure sensor deformations. This thin-film approach ensures stable attachment of the weight portion while preserving the sensor's ability to detect weak strikes.
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 solution enhances the detection accuracy of strike positions by ensuring the pressure sensor can detect pressure changes during weak strikes and reduces erroneous detections by maintaining sensor sensitivity and stability.
Implementation Method 1
an inertial force from the front surface of the pressure sensor toward a back surface of the pad acts on the weight portion, and the weight portion presses the pressure sensor
Data Source
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AI summary
The invention provides an electronic percussion instrument capable of improving detection accuracy for a strike. The electronic percussion instrument of the invention includes a plate-like pad that has a front surface to be struck, a sheet-like pressure sensor that is provided on a back surface of an outer circumferential end portion of the pad and that detects a pressure change, and a weight portion that contacts a front surface of the pressure sensor, wherein, due to striking on the front surface of the pad, an inertial force from the front surface of the pressure sensor toward a back surface of the pad acts on the weight portion, and the weight portion presses the pressure sensor.