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US 6,208,944 B1Granted
Method for determining and displaying spectra for vibration signals
AssigneePruftechnik Dieter Busch AG
InventorsDieter Franke, Johann Loesl, Steffen Buehler
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Abstract
A portable electronic vibration measurement device, detects a large number of structure-borne sound signals using a predetermined sequence of a plurality of specific individual measurements each plurality of measurements taken at a different sampling frequency.
Claims30
A method for gathering vibration data representing a measured vibration from a vibration sensor on a machine, said method comprising the steps of:
- receiving a first number of vibration signals in a data gatherer from said vibration sensor, said first number of vibration signals being sampled at a first sampling frequency, wherein said first sampling frequency is determined based upon a desired resolution of signal components in a first frequency band;
- receiving a second number of vibration signals in a data gatherer from said vibration sensor, said second number of vibration signals being sampled at a second sampling frequency, wherein said second sampling frequency is determined based upon a desired resolution of signal components in a second frequency band, said second sampling frequency being different from said first sampling frequency;
- processing said first number of vibration signals and said second number of vibration signals using said data gatherer;
- storing said first number of vibration signals and said second number of vibration signals in said data gatherer;
- subjecting said first number of vibration signals and said second number of vibration signals to frequency analysis to form corresponding first and second frequency spectra;
- and
- combining said first and second frequency spectra to form an overall frequency spectrum.
4 more elements
An apparatus for determining and displaying spectra for measured vibration of a machine, wherein said vibration is measured using a vibration sensor, said apparatus comprising:
- means for receiving a first number of vibration signals from said vibration sensor, said first number of vibration signals being sampled at a first sampling frequency, wherein said first sampling frequency is determined based upon a desired resolution of signal components in a first frequency band;
- means for receiving a second number of vibration signals from said vibration sensor, said second number of vibration signals being sampled at a second sampling frequency, wherein said second sampling frequency is determined based upon a desired resolution of signal components in a second frequency band, said second sampling frequency being different from said first sampling frequency;
- means for processing said first number of vibration signals and said second number of vibration signals;
- storage for said first number of vibration signals and said second number of vibration signals;
- means for subjecting said first number of vibration signals and said second number of vibration signals to frequency analysis to form corresponding first and second frequency spectra;
- and
- means for combining said first and second frequency spectra to form an overall frequency spectrum.
4 more elements
Dependencies are inferred from the claim text.