Electronic Cymbal Edge Hit Detection Using Dual Vibration Sensors
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Solution Overview
Problem
Conventional electronic percussion instruments struggle with accurate hit detection, particularly when the edge portion is hit lightly or from the side, due to the limitations of sheet sensors in detecting pressure.
Innovation Solution
The electronic percussion instrument incorporates a first frame with a hit surface, a first sensor for detecting vibrations on the first frame, a second frame positioned below in a non-contact state, and a second sensor for detecting vibrations on the second frame. The hit detection method determines which frame was hit based on the ratio or difference between the output values of the first and second sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a sheet sensor is used to detect pressure on the edge portion, then the structure is simple, but the hit detection accuracy deteriorates when hit lightly or from the side
Solution Approach 1:
The single edge frame is divided into two separate frames: a first frame (upper edge frame) and a second frame (lower edge frame). Each frame has its own sensor, allowing independent detection of hits from different directions and intensities, thereby improving hit detection accuracy without excessive complexity
Solution Approach 2:
The detection system transitions from a single-plane pressure detection to a multi-plane vibration detection by positioning the second frame below the first frame in a non-contact state. This vertical arrangement enables detection of hits from multiple dimensions, improving accuracy for light or side hits
2Device complexity
If a single frame with one sensor is used, then the device complexity is low, but the ability to detect hits from different directions and intensities is insufficient
Solution Approach 1:
The edge detection function is segmented across two frames positioned at different vertical levels. The first sensor detects hits on the first frame while the second sensor detects hits on the second frame, enabling the system to adapt to various hit directions and intensities
Solution Approach 2:
The dual-frame configuration provides multi-functionality by enabling detection of both light hits and strong hits, as well as hits from different directions (front and side), making the system more versatile without excessive 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 enhances hit detection accuracy by allowing precise determination of which frame was hit, even in cases where the edge portion is hit lightly or from the side, thereby improving overall performance.
Implementation Method 1
a first sensor attached to the first frame for detecting vibration of a hit to the first frame
Implementation Method 2
a second sensor attached to the second frame for detecting vibration of a hit to the second frame
Data Source
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AI summary
Provided are an electronic percussion instrument and a hit detection method whereby it is possible to improve the precision of hit detection. An overhang section 54 constituting the outer edge part of an edge frame 5 is positioned further radially outward than the outer edge of a bow frame 4. Consequently, when the overhang section 54 is hit, the vibration resulting from the hit is detected by an edge sensor S2 attached to the edge frame 5. In this way, it is possible to detect whether the overhang section 54 (the edge section of an electronic cymbal 1) has been hit by means of vibration detection by the edge sensor S2 instead of by means of pressure detection by a sheet sensor as in the prior art. It is thus possible to detect a hit with suitable precision even when a performer hits the overhang section 54 from the side with a stick 100 in an upright orientation or when the overhang section 54 is hit lightly.