Systems and methods for self-synchronized digital sampling
First Claim
1. A method for synchronous data frequency analysis, the method comprising:
- receiving a rotational frequency signal representing a rotational frequency of a rotating machine;
generating a sampling control signal based on the rotational frequency signal;
capturing one or more signals at a sampling frequency based on the sampling control signal to produce a sequence of synchronized data samples; and
analyzing the sequence of synchronized data samples;
wherein when the rotational frequency indicates the rotating machine is operating at a normal operating speed, the sampling frequency is proportional to the rotational frequency of the rotating machine; and
wherein when the rotational frequency indicates the rotating machine is operating at below the normal operating speed, the sampling frequency is equal to a nominal sampling frequency.
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Accused Products
Abstract
Systems and methods for self-synchronized data sampling are provided. In one embodiment, a system for capturing synchronous data samples is provided. The system includes an analog to digital converter adapted to capture signals from one or more sensors and convert the signals into a stream of digital data samples at a sampling frequency determined by a sampling control signal; and a synchronizer coupled to the analog to digital converter and adapted to receive a rotational frequency signal from a rotating machine, wherein the synchronizer is further adapted to generate the sampling control signal, and wherein the sampling control signal is based on the rotational frequency signal.
7 Citations
25 Claims
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1. A method for synchronous data frequency analysis, the method comprising:
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receiving a rotational frequency signal representing a rotational frequency of a rotating machine; generating a sampling control signal based on the rotational frequency signal; capturing one or more signals at a sampling frequency based on the sampling control signal to produce a sequence of synchronized data samples; and analyzing the sequence of synchronized data samples; wherein when the rotational frequency indicates the rotating machine is operating at a normal operating speed, the sampling frequency is proportional to the rotational frequency of the rotating machine; and wherein when the rotational frequency indicates the rotating machine is operating at below the normal operating speed, the sampling frequency is equal to a nominal sampling frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for capturing synchronous data samples, the system comprising:
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an analog to digital converter adapted to capture signals from one or more sensors and convert the signals into a stream of digital data samples at a sampling frequency determined by a sampling control signal; and a synchronizer coupled to the analog to digital converter and adapted to receive a rotational frequency signal from a rotating machine, wherein the synchronizer is further adapted to generate the sampling control signal, and wherein the sampling control signal is based on the rotational frequency signal, the synchronizer comprising; a phase lock loop circuit adapted to input the rotational frequency signal and output the sampling control signal, wherein the sampling control signal is synchronized with the rotational frequency signal, the phase lock loop circuit comprising; a variable oscillator coupled to the analog to digital converter and adapted to output the sampling control signal; a first frequency divider adapted to output a first signal representing the frequency of the sampling control signal divided by a constant; and a multiplier adapted to multiply the rotational frequency signal with the first signal; wherein the variable oscillator varies a frequency of the sampling control signal based on a product of the rotational frequency signal and the first signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for analyzing synchronous data, the system comprising:
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means for generating a sampling control signal based on a rotational frequency of a rotating machine; and means for converting one or more sensor signals into a sequence of data samples based on the sampling control signal, the means for converting responsive to the means for generating; wherein when a rotational frequency signal indicates the rotating machine is operating at a normal operating speed, a sampling control signal is generated that results in a sampling frequency being based on the rotational frequency of the rotating machine; and wherein when the rotational frequency signal indicates the rotating machine is operating at less than normal operating speed, a sampling control signal is generated that results in the sampling frequency being equal to a nominal sampling frequency. - View Dependent Claims (20, 21, 22)
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23. A computer-readable medium having computer-executable instructions for performing a method for synchronous data frequency analysis, the method comprising:
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receiving a rotational frequency signal representing a rotational frequency of a rotating machine; and generating a sampling control signal based on the rotational frequency signal; wherein when the rotational frequency indicates the rotating machine is operating at a normal operating speed, a sampling frequency is proportional to the rotational frequency of the rotating machine; and wherein when the rotational frequency indicates the rotating machine is operating at below the normal operating speed, the sampling frequency is equal to a nominal sampling frequency. - View Dependent Claims (24, 25)
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Specification