Test setup
The measurements were implemented in three measurement cross-sections where component, internal and external air temperatures, concrete strains and relative deformation were recorded. The strain of the traverses and the deformation of the corresponding lamella between the traverses were recorded at two points on the roadway joints (RJ). In addition, the deformation and movement of the pot bearings were recorded. Laser light barriers were mounted on the existing lateral noise protection walls to detect and determine the speed of heavy goods vehicles. This delivered additional measured values with which the positions of the HGV's in the lanes on the bridge could be determined.
Long distances between sensor and amplifier
In total, the measurement system comprised 96 measurement channels. There were great distances within the structure between sensors and amplifiers. The CANbus system was used to bundle the various measuring points. Four CANHEAD modules with CD 1010 carrier-frequency amplifiers were used here. The measurement channels came together with various connection cards in the amplifier system MGCplus. DC modules, TF modules and connections for PT100 temperature transducers were combined in the MGCplus. In addition to the MGCplus, two Spider8 amplifiers, connected in series to the measurement computer, were connected via the parallel port of the measurement computer. These carried out the deformation and movement measurements for the bearing bodies. Measurement data acquisition was implemented with the software catman®.