The SCADD system is based on
geometrical optics techniques with laser illumination. Its main
- Measurement principle: telemetry by scanning of a laser
beam. By measuring the delay of the optical signal reflected from each
inspected point, the system renders a component transverse to the
illumination direction of the displacement of that point.
- Measurement, in each scan, of a set of aligned control
points, being each point defined by a retroreflector attached to the
- Illumination and detection from the same module similar to
a small rack in size, located at one end of the structure to inspect.
No wiring or sensors have to be deployed along the structure.
- The foreseen measurement accuracy and the spatial and
temporal sampling density are adequate to the application of techniques
for structural integrity evaluation based on the Dynamic System
Characteristics (DSC) like natural frequencies, dynamic flexibility or
The intended application of the SCADD system will consist of field data
acquisition of structure vibrations.