Synchronous sampling of rotating elements in a fault detection system having audio analysis and method of using the same
First Claim
1. A fault detection system for determining whether a fault exists with a rotating element in a vehicle, the fault detection system comprising:
- a transducer located in the vehicle for converting sounds to an electrical signal, the electrical signal comprising a noise component generated from the rotating element;
a diagnosis sampler, connected to the transducer, for providing a sample of the electrical signal from the transducer;
a sensor for obtaining data relating to the rotating element;
a controller, connected to the diagnosis sampler and the sensor, having a synchronous resample, a spectrum analysis, and a fault detect, the synchronous resample having the capability of synchronizing the sample of the electrical signal with the data from the sensor to form a synchronized envelope, the spectrum analysis having the capability of forming a spectra from the synchronized envelope, the spectra being associated with the noise component generated from the rotating element, and the fault detect having the capability of determining from the formed spectra whether the fault exists with the rotating element.
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Accused Products
Abstract
A fault detection system for determining whether a fault exists with a rotating element of a vehicle. The system includes a transducer, a diagnosis sampler, a sensor, and a controller. The transducer may be a microphone located in the vehicle for converting sounds to an electrical signal. The electrical signal includes a noise component generated from the rotating element. The diagnosis sampler is connected to the transducer and provides a sample of the electrical signal from the transducer to the controller. The sensor obtains data relating to the rotating element. The controller has functional aspects such as a synchronous resample, a spectrum analysis, and a fault detect. The synchronous resample has the capability of synchronizing the sample of the electrical signal with the data from the sensor to form a synchronized envelope. The spectrum analysis has the capability of forming a spectra from the synchronized envelope of the electrical signal, where the spectra is associated with the noise component generated from the rotating element. The fault detect has the capability of determining (from the formed spectra) whether the fault exists with the rotating element. There is also a method of detecting a fault associated with a rotating element in a vehicle using the above-described system.
18 Citations
24 Claims
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1. A fault detection system for determining whether a fault exists with a rotating element in a vehicle, the fault detection system comprising:
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a transducer located in the vehicle for converting sounds to an electrical signal, the electrical signal comprising a noise component generated from the rotating element;
a diagnosis sampler, connected to the transducer, for providing a sample of the electrical signal from the transducer;
a sensor for obtaining data relating to the rotating element;
a controller, connected to the diagnosis sampler and the sensor, having a synchronous resample, a spectrum analysis, and a fault detect, the synchronous resample having the capability of synchronizing the sample of the electrical signal with the data from the sensor to form a synchronized envelope, the spectrum analysis having the capability of forming a spectra from the synchronized envelope, the spectra being associated with the noise component generated from the rotating element, and the fault detect having the capability of determining from the formed spectra whether the fault exists with the rotating element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting a fault associated with a rotating element in a vehicle, the method comprising the steps of:
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sampling an electrical signal from a transducer in the vehicle, the electrical signal comprising a noise component generated from the rotating element;
synchronizing the electrical signal with data from a sensor associated with the rotating element to form a synchronized envelope associated with the rotating element;
forming a spectra from the synchronized envelope, the spectra being associated with the noise component generated from the rotating element;
determining from the formed spectra whether the fault exists with the rotating element. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting whether a plurality of faults exist with a plurality of rotating elements in a vehicle, the method comprising the steps of:
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sampling an electrical signal from a transducer in the vehicle, the electrical signal comprising a plurality of noise components generated from the rotating elements;
synchronizing the electrical signal with data from a plurality of sensors associated with the rotating elements to form a synchronized envelope associated with each rotating element;
forming a plurality of spectra from the synchronized envelopes, each spectra being associated with one of the noise components generated from the rotating elements;
determining from each of the plurality of formed spectra whether one of the faults exist with one of the rotating elements. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification