Vibration monitoring system

[54] VIBRATION MONITORING SYSTEM

[75] Inventors: Robert K. Haseley, Mooresville; Paul A. Kirkpatrick, Charlotte, both of N.C.

[73] Assignee: Ingersoll-Rand Company, Woodcliff Lake, N.J.

[21] Appl. No.: 326,448
[22] Filed: Oct. 20,1994

[51] Int. CI.6 G06F 11/32; G06F 17/14

[52] U.S. CI 364/551.01; 364/550; 364/551.02;

364/474.19; 340/683; 340/635; 73/658;

73/579

[58] Field of Search 73/660, 593, 658,

73/659, 661, 579; 364/550, 508, 138, 551.02, 474.19, 474.17, 724.06, 726; 340/683, 680,

635; 324/555

[56] References Cited

U.S. PATENT DOCUMENTS

4,424,709 1/1984 Meier, Jr. et al. .

4,520,674 6/1985 Canada et al 73/660

4,559,828 12/1985 Liszka 73/658

4,885,707 12/1989 Nichol et al 364/551.01

5,422,824 6/1995 Biehleretal 364/494

OTHER PUBLICATIONS

Vibration Analysis II, Public Seminar, Developed by James E. Berry, P. E., Titled: Concentrated Vibration Signature Analysis and Related Condition Monitoring Techniques No Date.

Vibration Analysis III, Public Seminer, Developed by James E. Berry, P. E., Titled:Introduction to Special Vibration Diagnostic Techniques and How to Properly Specify Narrowband Spectral Envelope Alarms No Date.

A predictive vibration monitoring system for a machine includes a microcontroller and a machine to be monitored. The machine to be monitored includes at least one rotative element. At least one sensor is operatively connected to the machine. The at least one sensor is operable to convert mechanical motion generated by the at least one rotative element into a corresponding electrical signal. The at least one sensor inputs the corresponding electrical signal to the microcontroller. A communication means is disposed between the microcontroller and the monitored machine. The communication means enables the microcontroller to correlate a predetermined operational state of the monitored machine with a corresponding electrical signal generated by the at least one sensor. A memory means communicates with the microcontroller and stores a predetermined logic routine, at least one corresponding electrical signal and at least one predetermined key frequency of the at least one rotative element of the machine to be monitored. The microcontroller utilizes the predetermined logic routine to process the corresponding electrical signal into corresponding vibration data of the monitored machine. The microcontroller compares the corresponding vibration data with the at least one predetermined key frequency to predict the present and future condition of the at least one rotative element.

21 Claims, 4 Drawing Sheets