2020 BMWi - ZIM: Opto-acoustic measurement technology
Novel opto-acoustic measurement technology for mobile, non-destructive determination of the structural condition of asphalt pavements
Project staff
Contracting authority
Ferderal Ministry of Economic Affairs and Energy
Support program
Central Innovation Program for small and medium-sized enterprises
Project period
10/2020 - 03/2023
Project executing agency
Abstract
The aim of the project is the research and development of a novel opto-acoustic measurement technology for the driving, non-destructive determination of the structural condition of asphalt pavements. This is based on the pulse coupling of high-energy laser pulses (laser-induced shock wave excitation), which are registered in the road surface. From the propagation and reflection patterns of the structure-borne sound waves generated in this way, information on the stiffness or mechanical self-impedance of the layer structure is to be obtained, via which conclusions can be drawn about the internal composition, the layer composite & properties of the asphalt structure. This makes it possible to model the temporal change of the asphalt structure and offers a more well-founded approach for predicting the durability/lifetime of the pavement structure. The initial focus is on asphalt pavements, which generally have a three-layer structure and account for the largest proportion of motorways and trunk roads.