Multiple laser time of arrival probe

摘要

A system and method for performing stress measurement on rotating parts is disclosed. The system may include a laser assembly configured to emit a plurality of laser beams having different wavelengths, and a probe assembly mounted proximal to a rotatable part in a device. The probe assembly may be configured to output a reflected laser beam onto a first target on the rotatable part. The probe assembly may be configured to output another reflected laser beam onto a second target on the rotatable part. The probe assembly may include a redirector, and a lens assembly mounted proximal to the redirector and configured to converge the laser beams. The redirector may be configured to change the direction of each emitted laser beam.

主权项

1. A multiple laser time of arrival probe system for stress measurement of rotatable parts, the system comprising:
a laser emission and detection assembly configured to emit a first laser beam and a second laser beam, the first and second laser beams comprising different wavelengths; and a probe assembly disposed proximal to a rotatable part in an engine, the probe assembly configured to output a first reflected laser beam onto a first target on the rotatable part, the probe assembly further configured to output a second reflected laser beam onto a second target on the rotatable part, the second target different than the first target, the probe assembly including:
a redirector configured to change the first laser beam direction from a first direction to a second direction, and configured to change the second laser beam direction from a third direction to a fourth direction; anda lens assembly mounted proximal to the redirector and configured to converge the first laser beam onto the redirector and to converge the second laser beam onto the redirector.