Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Reexamination Certificate
2006-07-25
2006-07-25
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
C073S597000, C073S602000, C324S637000, C324S639000, C324S644000, C342S086000
Reexamination Certificate
active
07080554
ABSTRACT:
A method and apparatus for monitoring a condition having a known relation to, or influence on, the transit time of a cyclically-repeating energy wave moving through a transmission channel, by: (a) transmitting a cyclically-repeating energy wave through the transmission channel from a transmitter at one end to a receiver at the opposite end; (b) continuously changing the frequency of the transmitter according to changes in the monitored condition while maintaining the number of waves in the transmission channel as a whole integer; and (c) utilizing the changes in frequency of the transmitter to provide a continuous indication of the monitored condition. Operation (b) is preferably performed by detecting a predetermined fiducial point in each cyclically-repeating energy wave received by the receiver, but may also be performed by the use of a phase-locked loop circuit, to maintain the number of energy waves in the loop of the transmission channel as a whole integer.
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Ariav Arie
Ravitch Vladimir
Nexense Ltd.
Saint-Surin Jacques
Williams Hezron
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