Patent ID: 7026637
Filing Date: 2006-04-11
Classification: G01B

Abstract:
1. A device for measuring runout of a rotating tool, the device comprising: a sensing unit including: a processor in signal communication with the sensing unit, the processor being configured to receive the signal from the transducer; a memory in signal communication with the processor, the memory containing a program of instructions to be executed by the processor, the program being configured to instruct the processor to receive the signal, to determine a rotation period of the tool, and to record in the memory a digital measurement of instantaneous signal amplitude at a plurality of instants within the rotation period, the instants occurring at a sampling frequency, the digital measurements from the period being arranged in a temporally ordered sequence, the temporally ordered sequences being stored as a pane associated with the rotation period, each pane including an equal number of instants; an averaging filter configured to average corresponding instants across a plurality of panes to generate an averaged pane and an output device in signal communication with the processor and configured to indicate the determined displacement based upon the averaged pane.