Multi-Directional Bending Detection Using Segmented Piezoelectric Electrodes
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Solution Overview
Problem
Conventional bending-detection apparatuses using piezoelectric transducers can only detect bending deformations perpendicular to the electrodes, failing to detect deformations parallel to the electrodes, limiting their ability to detect various bending directions.
Innovation Solution
A bending-detection apparatus with a sheet-shaped substrate featuring a detecting mechanism comprising piezoelectric layers and alternately arranged first and second electrodes, where the electrodes' extending directions differ among detecting sections, allowing for the detection of bending deformations in multiple directions by measuring electric potential differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single set of alternately arranged first and second electrodes extending in one direction is used, then the structure is simple and easy to manufacture, but only bending deformations perpendicular to the electrodes can be detected, limiting detection capability
Solution Approach 1:
The substrate surface is divided into multiple detecting sections, with each section containing alternately arranged first and second electrodes. Each detecting section is oriented in a specific direction to detect bending deformations in corresponding directions. This segmentation allows the system to detect bending deformations in multiple directions by combining results from different detecting sections, resolving the contradiction between maintaining simple electrode structure and achieving comprehensive detection capability.
Solution Approach 2:
The electrode arrangement is designed to serve multiple detection functions. By arranging multiple detecting sections with different electrode orientations on the same substrate, the system can detect bending deformations in various directions using a unified detection mechanism, thereby achieving multi-directional detection capability without requiring fundamentally different sensing approaches.
2Adaptability or versatility
If multiple detecting sections with different electrode extending directions are arranged on the substrate, then bending deformations in various directions can be detected, but the device structure becomes more complex
Solution Approach 1:
Different detecting sections are positioned at specific locations on the substrate surface, with each section's electrodes arranged in a direction optimized for detecting bending deformations in that particular area. This local optimization allows the system to achieve comprehensive multi-directional detection coverage while maintaining relatively simple electrode arrangements in each local detecting section.
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 the detection of bending deformations in various directions, enhancing the apparatus's capability to monitor substrate curvature and deformations, and facilitating intuitive image changes on a flexible display by bending the substrate.
Implementation Method 1
a piezoelectric layer provided on a surface of the substrate... the sensor measures an electric potential difference between a first electrode and a second electrode... to detect the bending deformation of the substrate based on the measured potential difference
Data Source
AI summary
A bending-detection apparatus includes a sheet-shaped substrate having flexibility and a bending-detection mechanism including a sensor which measures a potential difference to detect bending deformations of the substrate and two bending-detection sections which are arranged on a surface of the substrate at different areas respectively. Each of the bending-detection sections has a piezoelectric layer provided on a surface of the substrate; plurality of first electrodes which are conducted with each other and each of which extends on a surface of the piezoelectric layer along a direction; a plurality of second electrodes which are arranged alternately with the plurality of first electrodes. An electrode-extending direction in which the first and second electrodes extend is different between the two bending-detection sections. Consequently, a bending-detection apparatus capable of detecting bending deformations in the substrate in various directions is provided.