Local positioning systems versus structural monitoring: a review

Structural monitoring and structural health monitoring could take advantage from different devices to record the
static or dynamic response of a structure. A positioning system provides displacement information on the location
of moving objects, which is assumed to be the basic support to calibrate any structural mechanics model. The
global positioning system could provide satisfactory accuracy in absolute displacement measurements. But the
requirements of an open area position for the antennas and a roofed room for its data storage and power supply
limit its flexibility and its applications. Several efforts are done to extend its field of application. The alternative
is local positioning system. Non-contact sensors can be easily installed on existing infrastructure in different
locations without changing their properties: several technological approaches have been exploited: laser-based,
radar-based, vision-based, etc. In this paper, a number of existing options, together with their performances, are
reviewed