We provide solutions for initial bridge laser- and hydrographical surveys, pier and deck monitoring as well as scour- and sonar monitoring.
Our hydro graphic department enables us to access and inspect river bridges and costal viaducts and the BIM team can carry out above water Laser scanning and collect condition data by using our Field BIM software.
Our tilt sensors and strain gauges are highly reliable
and are ruggedised to withstand weather and seawater. Usually we combine horizontal and vertical tilt sensors with seismic sensors and possible ATS (automatic total stations) which are employed in locations of potential settlement or even collapse to detect any movement. Tilt sensors are typically installed on the abutments and piers and ATS used to monitor the road deck or railway tracks.
The measurements to the observation points are carried out at arbitrary intervals from mobile total stations at fixed positions. The measuring points are fitted with suitable targets (glass prisms). The survey is controlled via the EUPALINOS software system and is based on the automatic target recognition capability of modern total stations. Consoles or pillars are used to accommodate the instruments and, if necessary, they can be re-calculated and controlled by free stationing in the course of the measurements. Instability of observation points
is strictly compensated via a balancing calculation, optionally also taking into account the distance scale. In this way, given a suitable survey configuration, meteorological data are not necessary.
If required, multiple total stations can be combined in a network to monitor widely dispersed areas. In this case the data from the individual measuring stations are transmitted to a central server via (radio) LAN or ISDN and administered in a database. The data are also independently stored on the specific control computer of the individual measuring stations. Depending on the configuration, output of diagrams and the triggering of various alarm procedures are handled locally by the EUPALINOS software, or centrally by the KRONOS database system.