Electronic Cymbal Edge Sensor Placement for Accurate Strike Detection
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Solution Overview
Problem
Conventional electronic cymbals often experience erroneous detection of striking sensors due to the placement of edge sensors on the upper surface, leading to incorrect determination of strikes on the edge portion when the bow portion is intended to be struck.
Innovation Solution
The electronic cymbal design features an extending portion of the covering member that extends beyond the outer circumferential edge, allowing the edge sensor to be positioned on the lower surface, reducing erroneous detection by sandwiching the sensor between the lower covering portion and the main body, and utilizing a hardness of 80 degrees (Shore A) or more for the covering member to mimic the striking feel of an acoustic cymbal while preventing stick catching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the edge sensor is disposed on the upper surface side of the main body portion, then the stroke on the edge portion can be detected, but erroneous detection occurs when the bow portion is struck near the edge
Solution Approach 1:
The edge sensor is moved from the upper surface to the lower surface of the main body portion, changing its spatial dimension. This allows the sensor to detect strokes on the extending portion without being activated by strokes on the bow portion, as the sensor is positioned in a location only accessible when the extending portion is struck.
Solution Approach 2:
Instead of placing the sensor directly on the edge portion where it would be easily activated, the sensor is inverted to the opposite side (lower surface) of the main body portion. This inversion allows detection of edge strokes through the extending portion's action on the lower covering portion while avoiding false activation from bow portion strokes.
2Ease of operation
If the hardness of the covering member is increased to 80 degrees (Shore A) or more, then the striking feeling similar to acoustic cymbal is achieved and stick catching is prevented, but elastic deformation under weak strokes is reduced
Solution Approach 1:
The hardness parameter of the covering member is optimized to 80 degrees (Shore A) or more to achieve the desired striking feeling and prevent stick catching, while the structural design of the extending portion and lower covering portion ensures sufficient elastic deformation even at this higher hardness level to activate the edge sensor for weak strokes.
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 design effectively suppresses erroneous sensor detection, enhances detection accuracy, and provides a striking feel similar to acoustic cymbals by ensuring the edge sensor accurately detects strikes on the extending portion while preventing stick catching, even with weak strokes.
Implementation Method 1
the lower covering portion is elastically deformed in a direction toward the main body portion
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
An electronic cymbal includes a disk-shaped main body portion and a striking sensor. A covering member is provided to cover an outer circumferential edge portion of the main body portion and includes an upper covering portion covering an upper surface side of the main body portion, an extending portion extending further toward an outer circumferential side than the outer circumferential edge portion of the main body portion, a lower covering portion covering a lower surface side of the main body portion. The striking sensor at least includes an edge sensor between the lower surface of the main body portion and the lower covering portion, and by pressing down the extending portion, the lower covering portion is elastically deformed in a direction toward the main body portion to sandwich the edge sensor with the lower covering portion and the main body portion and press the edge sensor.