Segmented Piezoelectric Acoustic Transducer for Higher Sensitivity
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Solution Overview
Problem
Acoustic transducers with piezoelectric elements require increased sensitivity.
Innovation Solution
The acoustic transducer includes a fixed frame and a piezoelectric element with detection and non-detection regions, where electrodes of the detection regions are electrically connected in series, and the thickness of the intermediate electrode is larger than that of the upper and lower electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the piezoelectric element uses a conventional single-layer structure, then the manufacturing process is simple, but the sensitivity is insufficient
Solution Approach 1:
The piezoelectric element is divided into multiple detection regions with electrodes connected in series, segmenting the sensing function across multiple zones to enhance overall sensitivity while maintaining a manageable structural complexity
Solution Approach 2:
Different regions of the piezoelectric element are assigned different functions: detection regions with electrodes for sensing and non-detection regions without electrodes for mechanical support, creating local quality variations that optimize both sensitivity and structural integrity
2Measurement precision
If multiple detection regions are electrically connected in series, then the sensitivity increases, but the device size increases
Solution Approach 1:
Multiple detection regions are merged into a single integrated piezoelectric element structure with series-connected electrodes, achieving enhanced sensitivity without proportionally increasing the overall device volume through compact spatial arrangement
3Object-affected harmful factors
If the intermediate electrode thickness is increased, then the resistance to dust and water droplets improves, but the manufacturing precision requirement increases
Solution Approach 1:
The thickness parameter of the intermediate electrode is specifically optimized to be greater than that of the upper and lower electrodes, creating a parameter change that enhances protective function while establishing clear manufacturing specifications for quality control
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 sensitivity of the acoustic transducer while maintaining stability and reducing size, with improved resistance to dust and water droplets.
Implementation Method 1
a piezoelectric element including a piezoelectric film supported at one end with the other end being a free end
Data Source
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AI summary
An acoustic transducer includes a fixed frame; and a piezoelectric element fixed to the fixed frame. The piezoelectric element includes a plurality of detection regions configured to detect a physical quantity, and a non-detection region configured not to detect the physical quantity. Electrodes of the plurality of detection regions are electrically connected in series.