Modular Pavement Slabs With Optical Fiber Defect Detection
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Solution Overview
Problem
Traditional pre-fabricated modular pavement slabs lack effective methods for focused, quick, and low-cost maintenance and defect detection, with defects often going undetected for years, leading to additional damage and expensive repairs.
Innovation Solution
A self-monitoring modular pavement slab system with embedded optical fiber sensors, including vehicle-strain and temperature sensors, to detect strain and temperature changes, enabling real-time data collection and analysis for early defect detection and improved maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional tools are used for defect detection in modular pavement slabs, then the detection method remains simple and cost-effective, but defect detection capability is insufficient and defects go undetected for years
Solution Approach 1:
The patent replaces traditional mechanical inspection methods with optical fiber sensor-based detection systems. The optical fiber sensors embedded in the pavement slabs detect strain, temperature, and other physical parameters, providing continuous monitoring capability that enables early defect detection while maintaining system simplicity through automated sensing and data collection.
2Duration of action of moving object
If no sensor array is embedded in the pavement slab, then the structure remains simple and manufacturing is easier, but real-time monitoring and early defect detection are not possible
Solution Approach 1:
The patent implements preliminary action by embedding optical fiber sensors during the manufacturing process of the pavement slabs. The sensors are integrated into the slab structure before installation, enabling continuous monitoring from the outset. This preliminary integration allows early defect detection while the slab is still in service, extending its operational life without requiring complex post-installation monitoring systems.
3Reliability
If temperature sensor is directly embedded in the pavement slab body, then temperature detection is straightforward, but the sensor is vulnerable to damage from vehicles and environmental factors
Solution Approach 1:
The patent applies the nested doll principle by placing the temperature sensor inside a protective housing that is itself embedded in the pavement slab. The housing acts as a protective shell that shields the sensor from direct exposure to vehicles and environmental factors while still allowing the sensor to accurately measure the temperature of the pavement slab body.
4Ease of manufacture
If no maintenance monitoring system is implemented, then the system remains simple and cost-effective, but maintenance costs increase due to undetected defects leading to additional damage
Solution Approach 1:
The patent implements feedback by continuously monitoring pavement slab conditions through embedded optical fiber sensors and providing real-time data on strain, temperature, and other parameters. This feedback mechanism enables early detection of defects and allows for timely maintenance interventions, preventing defect progression and reducing overall maintenance costs while preserving valuable defect information for analysis.
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
Enhances the longevity and efficiency of modular pavement systems by allowing for early detection of defects and environmental conditions, reducing maintenance costs and extending the lifespan of the pavement.
Implementation Method 1
one or more optical fiber cables embedded in the body. The sensor array includes vehicle-strain sensors configured to detect strain on the body resulting from vehicles traveling across the top surface
Implementation Method 2
a temperature sensor configured to detect temperature within the body
Data Source
AI summary
A segment of roadway includes a body having a top surface and a sensor array with one or more optical fiber cables embedded in the body. The sensor array includes vehicle-strain sensors configured to detect strain on the body resulting from vehicles traveling across the top surface and a temperature sensor configured to detect temperature within the body. The temperature sensor is surrounded by an air gap encased in a housing.