Patent ID: 6507804
Filing Date: 2003-01-14
Classification: G01H,G01N

Abstract:
A method for compressing measurement data correlative to status of operation of a machine, the steps including:monitoring a plurality of rotations of a rotating shaft of the machine; determining a period of each of said plurality of rotations defining previous periods; predicting a subsequent period of rotation of the rotating shaft as a function of said previous periods; sensing machine data correlative to the status of operation of the machine; sampling said sensed machine data at a sampling rate that is a function of said subsequent period; transforming said sampled data into spectral elements; comparing said spectral elements to a user definable criteria for retention; and compressing said sampled data by storing in a memory means those spectral elements which have passed said user definable criteria for retention wherein said stored spectral elements are correlative to the status of operation of the machine.