Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

Optimised impact-echo system

Commercially available impact-echo systems are designed for concrete testing applications, where the collected data are single point readings for thickness determination or for high-resolution near-surface investigation. Historic masonry is often characterised by very inhomogeneous, thick, composite walls. This causes a strong attenuation of the acoustical waves and requires discrete line or area covering measurements.

The commercial impact-echo tools producing the acoustical signal will be modified to have sufficient energy and frequency content to allow high-resolution investigation of thick, inhomogeneous structures (high penetration depth, reduced attenuation, improved resolution). The commercial receiving sensor has to be adapted to detect signals in a broad frequency range with optimised signal to noise ratio.

A scanning system for automated impact-echo measurements with high positioning resolution will be made available to allow data collection along lines and for area coverage. This automated collection mode is aimed for 2D, 3D and eventually for tomographic data reconstruction.

The scanning IE data acquisition software will be developed to account for new IE impact-echoers and receivers.

The scanning IE data visualisation software for real time 2D data plots will be modified accordingly to the acquisition software changes.

Reported by

Federal Institute for Materials Research and Testing (BAM)
Unter den Eichen 87
12205 Berlin
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