Omnidirectional Acoustic Sensor With Orthogonal Resonators
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Solution Overview
Problem
Existing acoustic sensors require multiple arrays to detect sound waves from various directions, leading to complexity and increased size, as they are directional and cannot effectively respond to sound waves from all 3D directions with a single chip.
Innovation Solution
An omnidirectional acoustic sensor design featuring a supporting frame with inner and outer resonators that vibrate in different directions, utilizing piezoelectric sensor units and masses to generate electrical signals, allowing detection of sound waves in 3D directions with a single chip, reducing the number of sensors and installation area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple resonator arrays are three dimensionally arranged to detect sound waves from various directions, then the detection capability in 3D directions is improved, but the device complexity and installation area increase
Solution Approach 1:
The patent combines multiple resonator arrays into a single integrated resonator structure that can detect sound waves from multiple directions simultaneously. The resonator includes multiple vibration units arranged in different orientations (e.g., X-axis, Y-axis, Z-axis directions) within one device, eliminating the need for separate arrays while maintaining omnidirectional detection capability
Solution Approach 2:
The resonator is designed with multi-functional vibration units that can respond to sound waves from various directions. Each vibration unit is configured to detect specific directional components, and the combination of these units provides universal detection capability across all three-dimensional directions within a single device
2Adaptability or versatility
If multiple resonator arrays are three dimensionally arranged to detect sound waves from various directions, then the detection capability in 3D directions is improved, but the installation area increases
Solution Approach 1:
The patent merges multiple resonator arrays into a single compact resonator structure, significantly reducing the installation area. By integrating multiple vibration units in different orientations within one device footprint, the system achieves omnidirectional detection without requiring the space needed for separate arrays
Solution Approach 2:
The resonator utilizes three-dimensional spatial arrangement of vibration units within a compact planar footprint. Vibration units are positioned and oriented in different spatial dimensions (X, Y, Z axes) allowing the device to detect sound waves from all directions while maintaining a small overall installation area
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 efficient detection of sound waves in three-dimensional directions with a single chip, reducing the required installation area and number of sensors compared to traditional three-axis sensor setups.
Implementation Method 1
a piezoelectric sensor unit arranged on an upper surface of the vibration unit
Implementation Method 2
Each of the resonators selectively resonates at a specific resonance frequency with respect to a vibration wave, such as a sound wave
Data Source
AI summary
An omnidirectional acoustic sensor is provided. The omnidirectional acoustic sensor includes first, inner resonators connected to an inner circumference of a supporting frame and second, outer resonators connected to an outer circumference of the supporting frame. The first, inner resonators vibrate in a height direction of the supporting frame and the second, outer resonators vibrate in a lateral direction of the supporting frame.