Patent · US Expired

Process for the acoustic examination of monoliths for damage and device for implementing the process

US5285687A · kind A · utility

10Cited by

5References

23Claims

0Family size

Assignee

Zeuna-Starker GmbH & Co. KG · DE

Inventors

Werner Ringel · Neusäß, DE
Peter Kugland · Friedberg, DE
Enrique Santiago · Augsburg, DE

Key dates

Filing date	Oct 7, 1991
Grant date	Feb 15, 1994
Priority date	—
Expiry date	Oct 7, 2011

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/0289
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and apparatus for the acoustic examination of a monolith for damage, wherein a blow of defined force is applied by a hard striker to a monolith for its acoustic examination for damage. The sound pressure distribution over a predetermined frequency range, of the sound radiated by the struck monolith is analyzed by a frequency analyzer and the result is compared with a reference curve defined for undamaged monoliths. The device for implementing the process has a receptacle for the monolith to be examined, a striker, capacitor microphones as the sound pressure receivers and an evaluation unit with a frequency analyzer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.