Rim Sensor Support for Electronic Percussion Instruments
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Solution Overview
Problem
Conventional electronic percussion instruments face challenges in accurately detecting rim percussion due to inadequate vibration transmission to rim sensors, resulting in sensitivity differences when the rim is struck at varying positions.
Innovation Solution
The design includes a cylindrical body with a head sensor and a rim sensor support method where the outer edge of the second frame is connected to the body at multiple positions around the periphery, ensuring efficient vibration transmission to the rim sensor regardless of the striking position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rim sensor is supported by a first support part protruding from the inner peripheral surface of the cylindrical part, then the device complexity is reduced, but the measurement precision deteriorates when the rim is percussed at a position away from the rim sensor
Solution Approach 1:
The support structure is divided into a first support part and a second support part that are detachably connected. The second support part can be detached to allow access to the cylindrical part interior for battery replacement or sensor adjustment, while the first support part remains fixed to provide stable vibration transmission. This segmentation resolves the contradiction by maintaining structural simplicity for vibration transmission while enabling maintenance access.
Solution Approach 2:
The second support part acts as an intermediary component between the rim sensor and the cylindrical part interior. It provides a detachable connection that allows the rim sensor to be indirectly coupled to the cylindrical part through the first support part, enabling maintenance access without compromising the vibration transmission path during normal operation.
2Ease of manufacture
If the first support part is linked to a specific region of the inner peripheral surface, then the ease of manufacture is improved, but the reliability of vibration transmission deteriorates for percussion at varying positions
Solution Approach 1:
The support structure transitions from a static, fixed configuration to a dynamic, adjustable configuration. The detachable second support part allows the rim sensor's position and orientation to be adjusted during assembly to optimize vibration transmission, while maintaining ease of manufacture through modular components that can be pre-fabricated and then assembled with optimal positioning.
3Measurement precision
If the rim sensor is positioned close to the striking position, then the measurement precision is improved, but the adaptability deteriorates when the rim is percussed at different positions
Solution Approach 1:
The rim sensor and its support structure are designed with asymmetric positioning capabilities. The second support part can be adjusted to optimize the sensor's position for detecting vibrations from different rim locations, allowing the system to adapt to various playing styles and rim striking positions while maintaining high detection sensitivity through optimized sensor orientation and placement.
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 enhances the accuracy of detecting rim percussion by ensuring consistent sensitivity across different striking positions, reducing erroneous detection and improving the overall performance of the electronic percussion instrument.
Implementation Method 1
a rim sensor, detecting vibration at a time of percussion to the rim
Implementation Method 2
a head sensor, contacting a lower surface of the head and detecting vibration at a time of percussion to the head
Data Source
AI summary
A support part 31 supporting a rim sensor 11 is connected with a body part 30 throughout an entire periphery (via an annular part 31c) in a peripheral direction. Therefore, wherever a rim 5 is percussed in the peripheral direction, vibration due to such percussion is easily transmitted to the rim sensor 11 of a central part 31a via a first connection part 31b. In addition, a bottom frame 2 supporting a head sensor 10 and a top frame 3 supporting the rim sensor 11 are separate components. Accordingly, the erroneous detection of the vibration by the head sensor 10 at the time of percussion to the rim 5, or the erroneous detection of the vibration by the rim sensor 11 at the time of percussion to the head 4, can be suppressed. As a result, the accuracy of detecting the percussion to the rim 5 can be facilitated.