Buildings almost never fail suddenly.
They start moving first – by millimeters.
That phase is usually invisible to the eye.
But it is exactly where structural risk accelerates.
The video shows how GNSS-based structural displacement monitoring works in practice:
– Blue point – current position of the monitored control point
– Red trace – historical displacement path
– dX / dY / dZ (mm) – movement along three spatial axes
It is measured structural behavior with millimeter-level precision.
Why this dramatically reduces risk
Risk is not defined by a single millimeter.
It emerges when:
– displacement becomes directional (drift)
– movement accelerates over time
– multiple points begin to move in a correlated pattern
GNSS monitoring captures motion dynamics, not just isolated defects.
That provides engineers, owners, and operators time to act – before damage becomes visible or irreversible.
What sensor is used and where it is installed
This system uses a GNSS (Global Navigation Satellite System) d
isplacement sensor, survey-grade and designed for continuous structural monitoring.
Typical installation locations:
– rooftops
– parapets
– upper portions of load-bearing walls
– structural cores and pylons
– zones where differential movement is expected
The sensor is rigidly fixed to the structural element (concrete or steel).
A stable reference station is placed in a non-moving control location.
The result is absolute displacement, not noise or relative drift.
How infrascan.ai delivers this
infrascan.ai provides GNSS monitoring as part of a broader SHM platform:
– millimeter-accurate GNSS control points
– time-series plots of dX / dY / dZ
– calculated velocity and acceleration of movement
– automated alerts based on abnormal trends
– a clear dashboard usable by both engineers and decision-makers
Because this is not monitoring for the sake of monitoring –
it is control over the moment when a building stops being static.
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