Membrane Hit Detection Layout for Fast Longitudinal Wave Sensing
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Solution Overview
Problem
Existing hit detection devices cannot effectively detect longitudinal vibration waves in thin membrane-like struck members.
Innovation Solution
A hit detection device comprising a vibration transmission member with a contact portion and two vibration detection sensors arranged to detect deformations in intersecting directions, allowing for the detection of longitudinal and transverse vibration waves in thin membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a sensor is provided on the side face of a plate-like struck member to detect longitudinal vibration waves, then the detection speed is improved, but the device cannot be mounted on thin membrane-like objects
Solution Approach 1:
The patent uses a flexible vibration transmission member in the form of a thin film that can be mounted on thin membrane-like struck members. This flexible film transmits vibrations from the struck surface to sensors mounted on the back surface, enabling longitudinal vibration wave detection while maintaining adaptability to thin membrane structures that rigid side-face mounting cannot accommodate.
2Stability of the object's composition
If the vibration transmission member uses a rigid structure for stable sensor mounting, then the mounting stability is improved, but the transmission of vibration waves from thin membranes is hindered
Solution Approach 1:
The vibration transmission member is designed as a flexible thin film that can be reliably mounted on thin membrane structures. This flexible film effectively transmits vibration waves from the struck surface to the sensors while maintaining mounting stability through adhesive bonding or integration with the membrane structure, resolving the conflict between rigidity for stability and flexibility for vibration transmission.
3Measurement precision
If sensors are arranged to detect both longitudinal and transverse vibration waves, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent arranges sensors on the back surface of the struck member in specific spatial configurations (e.g., at corners or edges) to detect both longitudinal and transverse vibration waves. By strategically positioning a limited number of sensors in three-dimensional space, the system achieves comprehensive vibration detection precision without requiring excessive sensors, thus balancing measurement precision with device 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
Enables rapid detection of longitudinal vibration waves, reducing the time between impact and sound emission, and facilitates precise determination of the hit point for varied electronic sound timbres.
Implementation Method 1
The vibration transmission member includes a contact portion in contact with the object, and deforms in response to the vibrations in the object
Implementation Method 2
Each of the two vibration detection sensors is configured to detect deformation in each of two different portions of the vibration transmission member
Data Source
AI summary
A hit detection device that detects vibrations in an object includes a vibration transmission member and two vibration detection sensors. The vibration transmission member includes a contact portion in contact with the object, and deforms in response to the vibrations in the object. The sensors each detect deformation in each of two different portions of the vibration transmission member. The two portions of the vibration transmission member are arranged in a direction intersecting an alignment direction in which the object and the vibration transmission member are aligned.