Method for measuring the structural health of a civil structure

This invention describes a way to check the health of a bridge by precisely measuring specific points on it. It uses multiple laser-based distance measuring devices and special reflectors to track how the bridge moves over time. A computer then analyzes this data to detect changes, comparing it to models or past measurements.

Why it matters: The cost and precision of EDM instruments have improved, and computational power for real-time analysis is far greater than in 2008.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedEDM instruments, retroreflectors, stable reference, analysis software

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