Multi-Element Piezoelectric Sensor for Composite Cylinder Damage Detection
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Solution Overview
Problem
Existing systems fail to effectively protect composite pressure cylinders from impact and cumulative damage, leading to potential catastrophic failures during filling cycles, with no commercially available methods to mitigate such damage.
Innovation Solution
A multi-element sensor system is developed, comprising sensors with varying sizes and configurations to detect impact and cumulative damage, utilizing piezoelectric materials to monitor composite structures, and a controller to assess damage severity and prevent further filling if thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used to monitor composite structure, then device complexity is reduced, but measurement precision and reliability for multiple monitoring tasks deteriorate
Solution Approach 1:
The sensor is divided into multiple sensing elements with different sizes (first sensing element, second sensing element, etc.) where each element is optimized for specific monitoring tasks. This segmentation allows each element to specialize in detecting particular types of damage or monitoring parameters, thereby improving overall measurement precision without requiring multiple separate sensors.
Solution Approach 2:
The sensor integrates multiple sensing elements within a single device structure, enabling one sensor to perform multiple monitoring tasks simultaneously. The first sensing element monitors for impact damage while the second sensing element monitors for cumulative damage, making the sensor universal for various monitoring purposes and reducing the need for multiple specialized sensors.
2Measurement precision
If larger sensor elements are used to improve detection coverage, then measurement precision improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of using a single large sensor element that would be difficult to manufacture and integrate, the sensor is segmented into multiple smaller sensing elements with different sizes. Each element can be independently fabricated and then assembled into the complete sensor, simplifying the manufacturing process while maintaining comprehensive detection coverage through the combination of different element sizes.
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
The system accurately detects and prevents the use or refilling of damaged composite cylinders, enhancing safety by preventing catastrophic failures and ensuring structural integrity during filling cycles.
Implementation Method 1
disposing a piezoelectric material between a layer having the first positive electrode and the second positive electrode and the ground electrode
Data Source
AI summary
Disclosed is a sensor for monitoring a composite structure. The sensor includes multiple sensing elements of different sizes, each configured for different respective monitoring tasks. Also disclosed are methods of fabricating the sensor, designing and manufacturing the sensor, and attaching the sensor to the composite structure.