초록 ▼

A method for localizing and analyzing sound emissions, wherein the position of the sound emission source is determined by incoming sound pulses at various measuring locations. The arrival time of a pulse or of a pulse characteristic is measured in three or more adjacent portions of each measuring lo

A method for localizing and analyzing sound emissions, wherein the position of the sound emission source is determined by incoming sound pulses at various measuring locations. The arrival time of a pulse or of a pulse characteristic is measured in three or more adjacent portions of each measuring location whose width is smaller than the expected sound field diameter. From this, the propagation time difference for the portion of each measuring location is determined and the sound arrival direction is determined from these propagation time difference values for each measuring location. Subsequently, the position of the sound emission source is determined from these direction values and the position coordinates of the measuring locations. The device for carrying out this method has three or more separate converter elements (1) for each receiver measurement head (E) whose total width is smaller than the expected sound field diameter.

대표청구항 ▼

Method for localizing and analyzing sound emissions in the testing of an article of apparatus or structural components for points of damage, wherein the location of the sound emission source is determined from the imcoming sound pulse at a plurality of individual measuring receivers in spaced arrang

Method for localizing and analyzing sound emissions in the testing of an article of apparatus or structural components for points of damage, wherein the location of the sound emission source is determined from the imcoming sound pulse at a plurality of individual measuring receivers in spaced arrangement on the surface of the article being tested, characterized therein by dividing each measuring receiver into at least three separate sound converter elements (1) having a total width smaller than the expected sound field diameter, measuring the arrival time of a pulse or of a pulse characteristic in each of said elements (1), determining the propagation time difference for said elements (1) of each measuring receiver (E), determining the sound arrival direction from these propagation time differences for each measuring receiver (E), and, subsequently, determining the position of the sound emission source from the direction values and the position coordinates of said measuring receivers (E).