To register surface distress (sub-project [TP 3] of ZEB) such as cracks and patches, the ARGUS® measuring system is equipped with three cameras aligned orthogonally with respect to the road surface.
Synchronized with nine high-power stroboscope lamps, the cameras are able to register roadway widths of up to 4.5 m at up to 100 km/h with a high resolution. The cameras and strobe lamps are controlled depending on the speed, thus ensuring travel in concordance with, and without, any disruptions to the flow of traffic.
The result is a complete video recording of the road surface for secure identification and documentation of cracks with a width of > 0.5 mm. Artificial illumination of the road surface using high-power stroboscopes, combined with an extremely short exposure time of 1/50,000 seconds results in superior-quality video recordings without any motion blur.
To be able to localize and refer to recordings using the road index, measurement runs include DGPS satellite navigation in combination with highly accurate measurement of distances travelled. In addition, the operator can manually register reference points (e.g. nodes) and enter the details into a data processing system.
The registration process of surface distress (cracks, patches, potholes, bleeding, ...) is followed by efficient, computer-aided analysis of the images for damage and other relevant characteristics by specially trained personnel using individually developed evaluation tools. The substance characteristics thus determined serve as a basis for measures including effective conservation planning.