BISOPE series
53- Comparison of Vibration Analysis (Vibration) and Acoustic Emission (AE)
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Vibration
and noise can be easily distinguished by comparing the media of solid and air,
but since vibration and ultrasonic sound emission are not differences in media,
the concept of frequency must be known.
The
practical use frequency of vibration is about 1~10,000Hz, and noise is
16~8,000Hz, while the area of ultrasonic sound emission
is 2kHz~100kHz. Of course, anything beyond that is
in the radio wave (MHz) range.
The use of ultrasonic waves
in equipment diagnosis probably began with the assumption that sounds or
acoustic vibrations that humans cannot hear may contain information (signals)
about the state of the machine. Therefore, ultrasonic waves are an area that
includes both airborne and structural sounds. Among them, acoustic emission
refers to ultrasonic waves generated due to friction between solids and solids
or between solids and fluids. Bearing friction or fluid
leakage in pipes are exact examples.
Applying ultrasound to equipment
diagnosis, sound emission
#Ultrasonic,
#Ultrasonic, #Acoustic emission, #AE, #Piezoelectric sensor, #Acceleration
sensor, #Ultrasonic sensor, #Solid sound, #Vibration education, #340, #SDT,
#170, #18436-6, #resonance, #Resonance analysis, #building vibration, #facility
diagnosis, #vibration measurement, #frequency analysis
