Piezoelectric Composite Pavement Pad With Hydrophobic Multilayer Structure
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Solution Overview
Problem
Conventional transportation systems rely on fossil fuel energy sources that contribute to adverse environmental effects, necessitating a sustainable and efficient alternative energy generation solution.
Innovation Solution
A multilayer composite material comprising a fabric layer coated with hydrophobic adhesive material, a piezoelectric transducer layer, and another fabric layer coated with adhesive material, which generates electricity through mechanical stress, utilizing piezoelectric transducers and DC power rails to output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If fossil fuel energy sources are used in conventional transportation systems, then energy supply is ensured, but adverse environmental effects occur
Solution Approach 1:
The patent converts the mechanical impact energy from vehicles and pedestrians, which is typically wasted, into useful electrical energy through piezoelectric transducers. This transforms a harmful environmental factor (wasted mechanical energy causing pollution) into a beneficial energy source, eliminating the need for fossil fuels while providing clean electricity for transportation infrastructure.
Solution Approach 2:
The transportation system generates its own energy through the piezoelectric pads embedded in the pavement. The mechanical energy from the normal operation of the system (vehicles and pedestrians moving across the pavement) is converted into electrical energy that powers the system itself, creating a self-sustaining energy generation mechanism.
2Productivity
If piezoelectric transducers are embedded in pavement, then energy is generated from impact, but device complexity increases
Solution Approach 1:
The pavement is divided into modular piezoelectric pad units that can be independently installed and maintained. Each pad contains its own piezoelectric transducer array, allowing for localized energy generation without requiring system-wide complexity. This segmentation enables scalable deployment from small walkways to large roadways.
Solution Approach 2:
The patent uses composite material structures combining piezoelectric ceramics with flexible polymer matrices and conductive materials. This composite approach integrates multiple functions (mechanical support, electrical generation, flexibility) into a single unified structure, reducing overall system complexity while maintaining energy generation capability.
3Reliability
If multiple layers with hydrophobic adhesive materials are used, then durability and flexibility are improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple functional layers (piezoelectric transducers, hydrophobic adhesive materials, flexible substrate, conductive elements) into an integrated composite pad structure. This merging of functions into a single manufactured unit simplifies installation and reduces the need for separate assembly steps, offsetting the increased complexity of the multi-layer structure itself.
Solution Approach 2:
The hydrophobic adhesive materials undergo parameter changes during manufacturing, transitioning from liquid or paste form to a cured solid state. This parameter change allows for simplified application processes where the adhesive is applied in a workable state and then cures to provide durable bonding, reducing the need for complex joining operations.
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 composite material effectively harvests energy from vehicle and pedestrian impact, providing a zero-emission energy source suitable for various pavement types, demonstrating flexibility, durability, and scalability for different transportation systems.
Implementation Method 1
the second layer comprises a piezoelectric transducer... the thin-film piezoelectric film comprises lead zirconium titanate... the DC power rails output voltage in response to impact on the composite device
Implementation Method 2
a first fabric layer coated with a hydrophobic adhesive material... a second fabric layer coated with a hydrophobic adhesive material
Data Source
AI summary
A multilayer composite energy generation device includes a bottom layer grouping including a fabric layer coated with a hydrophobic adhesive material, a middle layer including one or more piezoelectric transducers, and an upper layer include one or more fabric layers coated with a hydrophobic adhesive material. The middle layer may also be coated with a hydrophobic adhesive material. The piezoelectric transducer may include a thin-film piezoelectric material such as lead zirconium titanate (PZT). The hydrophobic adhesive material may be a paint-like polymeric material. The energy generation device may be coupled to a pavement segment such as a bicycle path, pedestrian path, or roadway.