Transdutor de ultrassom para altas temperaturas

Dois elementos angulares criam um trajeto de som em forma de V no material de teste. Este “pseudo-foco” melhora a resolução na zona focal. Um transdutor de elemento duplo possui dois elementos de cristal hospedados na mesma caixa, separados por uma barreira acústica. Um elemento transmite ondas longitudinais e o outro elemento atua como receptor. Advantages: • Improves near surface resolution • Eliminates delay line multiples for high temperature applications • Couples well on rough or curved surfaces • Reduces direct back-scattering noise in coarse grained or scattering materials • Combines penetration capabilities of a lower frequency single element transducer with the near surface resolution capabilities of a higher frequency single element transducer • Can be contoured to conform to curved parts Applications: • Remaining wall thickness measurement • Corrosion/erosion monitoring • Weld overlay and cladding bond/disbond inspection • Detection of porosity, inclusions, cracks, and laminations in castings and forgings • Crack detection in bolts or other cylindrical objects • Maximum temperature capability is 800°F (425°C) for 5.0 MHz and below; 350°F (175°C) for 7.5 MHz and 10 MHz. Recommended duty cycle for surface temperatures from 200°F (90°C) to 800°F (425°C) is ten seconds maximum contact followed by a minimum of one minute air cooling (does not apply to Miniature Tip Dual)