Double-Sided Bounce Impacting Mechanism for Bridge Deck Inspection
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Solution Overview
Problem
Existing infrastructure inspection methods are slow, traffic-disruptive, and limited in detecting internal damage such as delamination and corroded reinforcement in bridge decks, due to low pulse repetition frequency and inaccurate mechanical wave generation.
Innovation Solution
An integrated rapid infrastructure monitoring system with a double-sided bounce impacting mechanism and multichannel acoustic scanning unit, utilizing high-speed impactors and sensors like MEMS, GPR, and LIDAR for simultaneous data collection, enabling high-frequency impacts and non-destructive assessment of bridge decks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional impact-echo techniques are used with mechanical impactors, then delamination detection is achieved, but scanning speed is limited due to low pulse repetition frequency
Solution Approach 1:
The patent replaces conventional mechanical impactors with an electrodynamic shaker that uses electromagnetic force to generate mechanical vibrations. This substitution allows for precise control of vibration frequency and amplitude, enabling high pulse repetition frequency operation while maintaining accurate delamination detection through controlled excitation of flexural vibration modes in the bridge deck.
2Ease of manufacture
If visual inspection methods are used to identify delamination, then surface defects can be detected, but internal delamination remains invisible until significant damage occurs
Solution Approach 1:
The patent employs mechanical vibration of the bridge deck at its natural frequencies, particularly flexural vibration modes. By exciting the structure and measuring its response with accelerometers, the system can detect changes in vibration characteristics that indicate internal delamination, making invisible internal damage detectable through its effect on structural dynamics.
Solution Approach 2:
The patent uses the bridge deck itself as an intermediary medium. The electrodynamic shaker excites vibrations that propagate through the deck, and accelerometers measure these vibrations. The deck's structural response acts as a mediator that reveals internal delamination conditions without requiring direct contact with or exposure of the damaged areas.
3Measurement precision
If core extraction is used to identify delamination, then accurate detection is achieved, but the bridge deck suffers damage
Solution Approach 1:
The patent replaces destructive mechanical core extraction with non-contact or minimal-contact vibration-based measurement. The electrodynamic shaker and accelerometer system measures structural response to induced vibrations, providing accurate delamination detection without removing material or causing additional damage to the bridge deck.
Solution Approach 2:
The patent utilizes the bridge deck's own structural properties and natural vibrations for self-diagnosis. By exciting the deck and measuring its response, the system allows the structure to reveal its own condition through its vibrational characteristics, eliminating the need for destructive testing to assess its health.
4Reliability
If traffic control is implemented for lane closures during inspection, then safety is improved, but inspection time and disruption increase
Solution Approach 1:
The patent uses electrodynamic excitation and electronic sensing to replace slower conventional inspection methods. The rapid data collection capability of the vibration-based system allows inspections to be completed more quickly, potentially reducing the time traffic control is needed while maintaining safety through remote or minimal personnel presence.
Solution Approach 2:
The patent enables continuous inspection operation by using a mobile mounting system that can traverse the bridge deck while continuously collecting vibration data. The system maintains uninterrupted measurement as it moves, allowing inspection to proceed without stopping traffic flow or requiring lane closures, thereby reducing time loss while maintaining safety.
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 allows for rapid, traffic-disruption-free inspection of infrastructure with high-resolution data collection, detecting delamination, vertical cracks, and corroded reinforcement at higher speeds than conventional methods, reducing inspection time and improving data reliability.
Implementation Method 1
at least one actuator configured to transition the integrated rapid infrastructure monitoring system from a first configuration with at least one of a motive force and an impact bounce force of the impactor
Implementation Method 2
utilizing high-speed impactors and sensors like MEMS, GPR, and LIDAR for simultaneous data collection, enabling high-frequency impacts and non-destructive assessment of bridge decks
Data Source
AI summary
An integrated rapid infrastructure monitoring system for identifying defects in an underlying surface, comprising: at least one actuator; and, at least one impactor operatively connected to the actuator, wherein the actuator is configured to transition the integrated rapid infrastructure monitoring system from a first configuration with at least one of a motive force and an impact bounce force of the impactor, where the impactor is located on a first side of the integrated rapid infrastructure monitoring system, to a second configuration, where the impactor is located on a second side of the integrated rapid infrastructure monitoring system.