System for determining machine running speed from machine vibration: apparatus and method
First Claim
1. A method for determining running speed of a machine from a complex vibration signal outputted by a transducer monitoring machine vibration, the steps including:
- sampling and digitizing a complex vibration signal into a digitized vibration signal;
digitally mixing the digitized vibration signal with a digitized signal having a predetermined frequency for obtaining a mixed signal comprised of a stream of inphase and quadrature components;
transforming the stream of inphase and quadrature components into at least one phase per second value;
determining a signal frequency of a vibration component contained in the complex vibration signal as a function of at least the one phase per second value, and calculating machine running speed as a function of the determined signal frequency for use in correlating machine vibrations to physical phenomena that generated them.
1 Assignment
0 Petitions
Accused Products
Abstract
A System for determining machine running speed by sampling and digitizing a complex signal sensed by a transducer monitoring a machine into a digitized signal; mixing the digitized signal with a digitized signal having a predetermined frequency for obtaining a stream of inphase and quadrature components; filtering intervals of the stream of components for obtaining a plurality of vectors each having a phase; determining a unknown signal frequency of a vibration component contained in the complex vibration signal as a function of at least the one phase per second value, and calculating the machine running speed as a function of the plurality of vectors.
-
Citations
20 Claims
-
1. A method for determining running speed of a machine from a complex vibration signal outputted by a transducer monitoring machine vibration, the steps including:
-
sampling and digitizing a complex vibration signal into a digitized vibration signal;
digitally mixing the digitized vibration signal with a digitized signal having a predetermined frequency for obtaining a mixed signal comprised of a stream of inphase and quadrature components;
transforming the stream of inphase and quadrature components into at least one phase per second value;
determining a signal frequency of a vibration component contained in the complex vibration signal as a function of at least the one phase per second value, and calculating machine running speed as a function of the determined signal frequency for use in correlating machine vibrations to physical phenomena that generated them. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for determining running speed of a machine from a signal outputted by a transducer monitoring the machine, the steps including:
-
sampling and digitizing the signal into a first digitized signal;
digitally mixing the digitized signal with a second digitized signal having a predetermined frequency for obtaining a mixed signal comprised of a stream of inphase and quadrature components;
transforming the stream of inphase and quadrature components into at least one phase value;
determining a signal frequency of an unknown component contained in the first digitized signal as a function of at least the one phase per second value, and calculating machine running speed as a function of the determined signal frequency of the unknown component for use in correlating the machine measurements to physical phenomena that generated them. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
-
14. A method for determining running speed of a machine from a signal outputted by a transducer monitoring the machine, the steps including:
-
sampling and digitizing the vibration signal into a first digitized signal;
digitally mixing the first digitized signal with a second digitized signal having a predetermined frequency for obtaining a stream of inphase and quadrature components;
transforming the stream of inphase and quadrature components into at least one rotating vector;
determining the angular velocity of at least the one rotating vector, and determining machine running speed as a function of the determined angular velocity of at least the one rotating vector for use in correlating machine measurements to physical phenomena that generated them.
-
-
15. An apparatus for determining running speed of a machine from a complex vibration signal outputted by a transducer monitoring the machine, said apparatus comprising in combination:
-
an analog to digital converter operatively coupled to the transducer for sampling and digitizing said complex vibration signal into a digitized vibration signal;
a digital multiplier operatively coupled to said analog to digital converter for digitally mixing said digitized vibration signal with a digitized signal having a predetermined frequency for obtaining a mixed signal comprised of a stream of inphase and quadrature components;
a filtering means operatively coupled to said digital multiplier for filtering intervals of said stream of inphase and quadrature components for obtaining a plurality of vectors each having a phase;
a processor operatively coupled to said filtering means for transforming said plurality of vectors into at least one phase per second value;
said processor determining a signal frequency of a vibration component contained in said complex vibration signal as a function of at least said one phase per second value, and said processor calculating a machine running speed as a function of said determined signal frequency for use in correlating the machine vibrations to physical phenomena that generated them. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification