System for determining FOVM sensor beat frequency
AssigneeWestinghouse Electric Corp.
InventorMichael Twerdochlib
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Abstract
A method for determining a beat frequency in a vibration sensing system attached to an electrical generator comprises the steps of (a) generating a vibration signal indicative of a vibrational frequency and amplitude of the generator; and (b) obtaining a beat frequency from the vibration signal by storing and processing time interval data representing the time intervals between zero crossings of the vibration signal. A generator 10, optical vibration sensor 12, and computer 14 constitute the vibration sensing system 16. The computer is programmed to analyze the time interval data to obtain the beat frequency.
Claims18
A method for determining a beat frequency in a vibration sensing system attached to equipment, comprising the steps of:
- (a) generating a vibration signal indicative of a vibrational frequency and amplitude of the equipment;
- and
- (b) obtaining a beat frequency from the vibration signal by storing and processing time interval data representing the time intervals between zero crossings of the vibration signal.
A system for determining a beat frequency associated with a vibration sensing system attached to equipment, comprising:
- (a) means for generating a vibration signal indicative of a vibrational frequency and amplitude of the equipment;
- and
- (b) means for obtaining a beat frequency from the vibration signal by storing and processing time interval data representing the time intervals between zero crossings of the vibration signal.
In a method for calibrating a vibration sensor comprising the steps of obtaining a vibration signal from the vibration sensor, the vibration signal corresponding to vibration of equipment to which the sensor is attached;
- extracting a beat frequency vibration signal having a beat frequency from the vibration signal;
- computing a resonant frequency of the vibration sensor in dependence upon the beat frequency;
- and calibrating the vibration sensor in dependence upon the resonant frequency;
- an improved method for obtaining said beat frequency vibration signal, comprising the steps of:
- (a) generating a vibration signal indicative of a vibrational frequency and amplitude of the equipment;
- and
- (b) obtaining a beat frequency from the vibration signal by storing and processing time interval data representing the time intervals between zero crossings of the vibration signal.
Dependencies are inferred from the claim text.