Method and apparatus for periodic noise suppression in transient signals
First Claim
1. A system for cyclical noise removal from a transient signal comprising:
- a transient sensor for a signal;
a signal conditioner connected to the transient sensor and processing the signal;
a transient digitizer receiving the processed signal;
a signal processor for filtering of a non-cyclic transient waveform;
an embedded computer with associated software forperforming an analysis of the ambient background just prior to the time that the transient waveform of interest is detected;
performing an analysis of the signal containing the transient waveform of interest;
extending the analyzed ambient background through the period of time during which the transient waveform is occurring; and
,subtracting the background from the transient waveform.
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Abstract
A system for cyclical noise removal from a transient signal is employed with a transient sensor for a signal. A signal conditioner is connected to the transient sensor for processing the signal. A transient digitizer captures the processed signal including capture of a sufficient period of time before the transient to accurately analyze the cyclic noise, capture of a period of time to be sure the transient is not effecting the ambient and capture of the period of the transient. A signal processor is employed for filtering of a non-cyclic transient signal. An embedded computer with associated software performs an analysis of the ambient background just prior to the time that the transient signal of interest is detected, performs an analysis of the signal of interest, extends the analyzed ambient background signal through the period of time during which the transient signal is occurring and subtracts the background from the transient signal.
6 Citations
10 Claims
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1. A system for cyclical noise removal from a transient signal comprising:
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a transient sensor for a signal; a signal conditioner connected to the transient sensor and processing the signal; a transient digitizer receiving the processed signal; a signal processor for filtering of a non-cyclic transient waveform; an embedded computer with associated software for performing an analysis of the ambient background just prior to the time that the transient waveform of interest is detected; performing an analysis of the signal containing the transient waveform of interest; extending the analyzed ambient background through the period of time during which the transient waveform is occurring; and
,subtracting the background from the transient waveform. - View Dependent Claims (2, 3, 4)
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5. A method for noise removal from a transient signal comprising the steps of:
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digitizing a signal from a sensor; identifying a transient waveform; capturing the transient waveform in a digital memory; performing an analysis of ambient background in the signal just prior to the time that the transient waveform of interest is detected; performing an analysis of the transient waveform of interest; extending the analyzed ambient background through the period of time during which the transient waveform is occurring; and
,subtracting the extended ambient background from the transient waveform. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification