System and method for vibration severity assessment independently of vibration frequency
First Claim
1. A system for providing a vibration severity indication of a machine component, the system comprising:
- a vibration sensor positioned to sense the vibration of the machine component, providing a real-time signal containing information pertaining to amplitude and frequency of vibrations of the component over a spectrum including at least a first analysis bandwidth and a second analysis bandwidth during use, andan electronic circuit connectable to receive the real-time signal from the vibration sensor, the electronic circuit being configured to perform each one ofa function to determinevalues indicative of the severity of vibrations occurring at frequencies in the first analysis bandwidth in a first unit of one of displacement, velocity, and acceleration, andvalues indicative of the severity of vibrations occurring at frequencies in the second analysis bandwidth in a second unit of one of displacement, velocity and acceleration, the second unit being different from the first unit;
a function to associate the values of both the first analysis bandwidth and the second analysis bandwidth to values in a synthetic unit representing comparable severity of vibrations in the first analysis bandwidth and the second analysis bandwidth, anda function to generate a signal indicative of a given level of the severity of vibrations being reached based on the association.
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Accused Products
Abstract
The method includes receiving a real-time signal containing information pertaining to amplitude and frequency of vibrations of a machine component over a frequency spectrum including a first analysis bandwidth and a second analysis bandwidth, and using the real-time signal to determine values indicative of the severity of vibrations occurring at frequencies in the first analysis bandwidth in a first unit of one of displacement, velocity, and acceleration, and determine values indicative of the severity of vibrations occurring at frequencies in the second analysis bandwidth in a second unit of one of displacement, velocity and acceleration, the second unit being different from the first unit; and associating the determined values in a common unit representing comparable severity of vibrations in the first analysis bandwidth and the second analysis bandwidth.
18 Citations
8 Claims
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1. A system for providing a vibration severity indication of a machine component, the system comprising:
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a vibration sensor positioned to sense the vibration of the machine component, providing a real-time signal containing information pertaining to amplitude and frequency of vibrations of the component over a spectrum including at least a first analysis bandwidth and a second analysis bandwidth during use, and an electronic circuit connectable to receive the real-time signal from the vibration sensor, the electronic circuit being configured to perform each one of a function to determine values indicative of the severity of vibrations occurring at frequencies in the first analysis bandwidth in a first unit of one of displacement, velocity, and acceleration, and values indicative of the severity of vibrations occurring at frequencies in the second analysis bandwidth in a second unit of one of displacement, velocity and acceleration, the second unit being different from the first unit; a function to associate the values of both the first analysis bandwidth and the second analysis bandwidth to values in a synthetic unit representing comparable severity of vibrations in the first analysis bandwidth and the second analysis bandwidth, and a function to generate a signal indicative of a given level of the severity of vibrations being reached based on the association. - View Dependent Claims (2, 3)
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4. A system for activating a protective measure upon determining that vibrations of a component of a machine reach an associated vibration severity level, the system comprising:
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at least one vibration sensor for generating a vibration signal indicative of an amplitude of said vibrations, the vibration signal spanning one of at least a low frequency bandwidth and an adjacent intermediate frequency bandwidth and at least the intermediate frequency bandwidth and an adjacent high frequency bandwidth, an electronic circuit for performing a bandwidth-dependent transfer function for receiving the vibration signal, and outputting a converted signal in which, independently of original amplitude units of the vibration signal, the corresponding at least two of vibrations spanning the low frequency bandwidth are represented in units of displacement amplitude, vibrations spanning the intermediate frequency bandwidth are represented in units of velocity amplitude, and vibrations spanning the high frequency bandwidth are represented in units of acceleration amplitude; an analysis module for performing a comparator function for comparing the corresponding at least two of displacement amplitude unit representation across the low frequency bandwidth to a constant displacement amplitude value across the low frequency bandwidth; velocity amplitude unit representation across the intermediate frequency bandwidth to a constant velocity amplitude value across the intermediate frequency bandwidth; and acceleration amplitude unit representation across the high frequency bandwidth to a constant acceleration amplitude value across the high frequency bandwidth; wherein said corresponding at least two of constant displacement amplitude value, constant velocity amplitude value, and constant acceleration amplitude value are associated to a synthetic unit indicative of the associated vibration severity level independent of the bandwidth; and a protection module for activating the protective measure upon determining based on said comparison that said vibrations at least reach said vibration severity level at any frequency within said corresponding bandwidths. - View Dependent Claims (5, 6, 7, 8)
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Specification