초록 ▼

An ultrasonic stroboscope is used to inspect an object rotating at a first frequency to determine if the rotating object has any defects. The ultrasonic stroboscope includes a first acoustic transducer spaced apart from the rotating object. The first transducer is configured to radiate ultrasonic en

An ultrasonic stroboscope is used to inspect an object rotating at a first frequency to determine if the rotating object has any defects. The ultrasonic stroboscope includes a first acoustic transducer spaced apart from the rotating object. The first transducer is configured to radiate ultrasonic energy at the rotating object at a second frequency. The second frequency is substantially related to a sub-harmonic of the first frequency so that the rotating object appears acoustically substantially still. A second acoustic transducer is used to sense a reflection of the ultrasonic energy from a defect in the rotating object. The second transducer translates the sensed reflection into at least one reflection signal. A user interface is coupled to the reflection signal.

대표청구항 ▼

[ What is claimed is:] [1.] A method of inspecting at least one portion of a rotating turbine rotor using an ultrasonic stroboscope, wherein the turbine rotor is mounted in a turbine housing and the inspection is performed while the turbine is operating, said method comprising the steps of:selecting

[ What is claimed is:] [1.] A method of inspecting at least one portion of a rotating turbine rotor using an ultrasonic stroboscope, wherein the turbine rotor is mounted in a turbine housing and the inspection is performed while the turbine is operating, said method comprising the steps of:selecting the rotor component to be inspected;synchronizing said ultrasonic stroboscope with the rotation of said turbine rotor so that a plurality of emitted ultrasonic pulses from a first transducer are directed towards the selected component at a frequency substantially related to the rotation frequency of said rotor to cause said rotating turbine component to appear acoustically stationary;receiving at least a first echo of at least one of said plurality of emitted ultrasonic pulses using a second transducer, said first echo resulting from said at least one emitted ultrasonic pulse encountering a discontinuity in said turbine component; andsupplying information related to said at least one echo for further analysis.