Method and apparatus to provide dynamic ultrasonic measurement of rolling element bearing parameters
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United States of America Patent
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Jun 3, 2003
Grant Date -
N/A
app pub date -
May 18, 2000
filing date -
May 18, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An acoustic signal unit comprises a signal generation unit to generate a first electrical signal, a first transducer to generate an acoustic signal in response to the first electrical signal, and a second transducer to generate a second electrical signal in response to the received acoustic signal. A calculation unit is provided to compare the first and second electrical signals to determine the time of flight of the acoustic signal, wherein the time of flight corresponds to the stress in the rolling element bearing. The stress may be calculated according to a formula or by multiplying an acoustic time constant for the rolling element bearing by the distance traveled by the acoustic signal across the rolling element bearing, and by the time of flight determined by said comparison unit.
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