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US 9,791,343 B2Granted
Methods and systems to derive engine component health using total harmonic distortion in a knock sensor signal
AssigneeGeneral Electric Company
InventorJeffrey Jacob Bizub
Life of this patent
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Abstract
A method of deriving reciprocating device component health includes receiving a signal from a knock sensor coupled to a reciprocating device, deriving total harmonic distortion (THD) at one or more frequencies, and determining whether the derived THD exceeds a threshold value.
Claims19
A method of deriving reciprocating device component health comprising:
- utilizing a controller for:
- receiving a signal from a knock sensor coupled to a reciprocating device;
- deriving a first total harmonic distortion (THD) of the signal at a first fundamental frequency of a first reciprocating device component;
- determining whether the derived first THD exceeds a first threshold value;
- deriving a second THD of the signal at a second fundamental frequency of a second reciprocating device component;
- and
- determining whether the derived second THD exceeds a second threshold value.
4 more elements
A system comprising:
- a reciprocating device controller configured to control a reciprocating device, wherein the reciprocating device controller comprises a processor configured to:
- obtain first and second fundamental frequencies of first and second reciprocating device components;
- receive a signal from a knock sensor coupled to the reciprocating device;
- derive a first total harmonic distortion (THD) of the signal at the first fundamental frequency of the first reciprocating device component;
- determine whether the derived first THD exceeds a first threshold value;
- derive a second THD of the signal at the second fundamental frequency of the second reciprocating device component;
- and
- determine whether the derived second THD exceeds a second threshold value.
5 more elements
A non-transitory computer readable medium comprising executable instructions that when executed cause a processor to:
- obtain first and second fundamental frequencies of first and second reciprocating device components;
- receive a signal from a knock sensor coupled to the reciprocating device;
- derive a first total harmonic distortion (THD) of the signal at the first fundamental frequency of the first reciprocating device component;
- determine whether the derived first THD exceeds a first threshold value;
- derive a second THD of the signal at the second fundamental frequency of the second reciprocating device component;
- determine whether the derived second THD exceeds a second threshold value;
- and
- provide a user perceptible indication of the presence of distortion.
5 more elements
Dependencies are inferred from the claim text.