Multiple axis transducer mounting collar

摘要

An improved apparatus and method for determining the existence and severity of a crack in a shaft system is provided. The apparatus includes means for mounting multiple vibration responsive output transducers around an outer circumference of the shaft system, allowing simultaneous measurements of vibrational response of the shaft system when multiple vibration responsive output transducers are mounted to the mounting means. In a first approach, the mounting means comprises a collar having two connected arcuate members, with drilled milled and tapped apertures for mounting radial input and output transducers. Torsional input and output transducers may also be mounted tangentially on the collar in drilled milled and tapped heads of bolts used to connect the two arcuate members. In a second approach, the mounting means comprises a plurality of support blocks disposed substantially symmetrically around and protruding outward from the outer collar circumference with each of the blocks orienting at least one transducer in a radial direction and at least one transducer in a tangential direction. Each block may further orient another transducer in an axial direction.