process and device for the determination of the structural features of the surface track through a system of combined acoustic and magnetic sensors wide-angle

摘要

The present invention relates to a device for measuring the condition of a carriageway (4), comprising an acoustic measuring means (6, 8) for determining at least one acoustic reflection coefficient (13) from an amplitude relationship and/or phase relationship of an acoustic wave (10) emitted by the acoustic measuring means (6, 8) and of the acoustic wave (12) reflected by the carriageway (4),and comprising an electromagnetic measuring means (14, 16) for determining at least one electromagnetic reflection coefficient (22) from an amplitude relationship and/or phase relationship from an electromagnetic wave (18) emitted by the electromagnetic measuring means (14, 16) and from the electromagnetic wave (20) reflected by the carriageway (4). The device (2) is designed to determine the condition (26) of the carriageway (4) on the basis of the at least one acoustic and the at least one electromagnetic reflection coefficient (13, 22).