Measuring and testing – Vibration – By mechanical waves
Patent
1997-08-07
2000-09-12
Kwok, Helen C.
Measuring and testing
Vibration
By mechanical waves
73660, G01H 100, G01M 700
Patent
active
06116089&
ABSTRACT:
A system for detecting defects in a rotating machine system includes a sensor such as an accelerometer coupled to the machine system for detecting vibrations of a rotating element. Output of the accelerometer is transmitted, preferably via a network data link to a monitoring/control circuit. The monitoring/control circuit analyzes the vibration data to develop a normal vibration profile for the machine system during a normal operating phase. The normal vibration profile is stored in a memory circuit for later reference. During subsequent operation of the machine system, the monitoring/control circuit cyclically analyzes vibration data to develop actual vibration profiles. The actual vibration profiles are compared to the normal vibration profile and, where variations between the profiles exceed preset tolerances, the circuit provides an indication of a malfunction or defect in the machine system. The technique is particularly well suited to conveyor systems such as drum pulleys and the like in which cracks, breaks and other defects can result in unexpected failure and maintenance.
REFERENCES:
patent: 4262538 (1981-04-01), Otawara
patent: 4408294 (1983-10-01), Imam
patent: 5187434 (1993-02-01), Ando
patent: 5533400 (1996-07-01), Gasch et al.
El-Ibiary Yehia M.
Sarkisian Richard L.
Horn John J.
Kwok Helen C.
Reliance Electric Technologies LLC
Walbrun William R.
Yoder Patrick S.
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