Patent ID: 8437968
Filing Date: 2013-05-07
Classification: G01H

Abstract:
1. A method for monitoring the vibration of a rotating shaft comprising: (A) measuring a current shaft position with at least one sensor and storing the current shaft position on a non-transient computer readable medium of a processing unit; (B) determining a centroid of the shaft with at least one processor of a processing unit; (C) determining a sector in which the current shaft position is located with the at least one processor; (D) determining the current distance between the centroid and the current shaft position with at least one processor; (E) comparing the current distance with a previously stored maximum distance for that sector with the at least one processor, and if greater, storing the current shaft position as the new stored maximum position for that sector and storing on the non-transient computer readable medium the current distance as the new stored maximum distance for that sector; (F) repeating steps (A)-(E) for a predetermined period of time; (G) calculating, after the predetermined period of time, the maximum displacement between the stored maximum positions with the at least one processor, which represents the maximum shaft displacement peak to peak; and (H) visually displaying with a visual display or automatically monitoring with the at least one processor the maximum shaft displacement peak to peak to as an indicator of shaft vibration.