Building component non destructive test elastic wave generation procedure blows separate charge solid particles with low melting or sublimation point at surface

摘要

A building component non destructive test elastic wave generation procedure blows separate charged solid particles such as carbon dioxide that are melt or sublimate at temperatures below 30 Celsius at the component surface, detects their impacts electrostatically and detects the elastic waves using contactless laser vibrometer impact detector for use in sound emission tomography.