Topic: Waveforms in Noesis Marketing Old... · 2011-05-24 · Noesis – Waveforms Capabilities Noesis main features relating to Waveforms: 1. Import of multiple waveforms from several

© Copyright Mistras Group Inc. 2010 1

Advanced Data Analysis

Pattern Recognition & Neural Networks Software

for Acoustic Emission Applications

Topic: Waveforms in Noesis


Noesis – Waveforms Capabilities

Noesis main features relating to Waveforms:

1. Import of multiple waveforms from several format

2. Export of waveforms to several formats

3. Plotting of waveforms using different representations (time and frequency domain)

4. Advanced waveform processing (DSP)

5. Waveform statistical processing

6. Feature extraction from recorded waveforms

7. Waveforms and Features correlation (also Waveforms and Pattern Recognition

Classes Correlation)

8. Live processing and Feature Extraction


Import/Export Waveforms

Waveforms can be loaded into Noesis by import:

• AE Data (DTA) from Spartran, Mistras, DiSP, Sensor Highway, PocketAE PAC’s

Systems

• AE Wave Streaming Data (WFS) from PCI-2 systems.

• AE Wave Data (TDA): from TRA, MISTRAS and DiSP systems.

• ASCII Waveform (TXT) from tab delimited ASCII waveform files.

Waveforms can be exported from Noesis:

• To their original format after processing

• To ASCII Waveform (TXT)

• Also WFS can be exported to DTA after splitting to shorter length


Plotting Waveforms (1)

• All waveform plots can be fully customized (from plot type to axes scaling and feature to font type and size) using the plot properties dialog, with just a simple mouse right-click.

• A large variety of plots are available.

• Pages set-up resulting in multiple SCREENS with any combination of graphs.


Time Domain Waveform plot type available:


Time Domain

Time - Wave

Time – Rectified Wave

Time – Wave RMS

Time – Auto Correlation

Time - Cross Correlation


Frequency Waveform plot type available:


Frequency Domain

FFT - Real

FFT - Imaginary

FFT - Magnitude

FFT - Phase

FFT – Power Spectrum


Advanced Frequency Waveform plot type available:


Frequency Domain (more)

Short Time FFT

Short Time FFT Spectrogram

Discrete Wavelet Transformation

Continuous Wavelet Transformation

Power Cepstrum


Statistical Processing and plotting of Waveforms


Waveform Data

Raw Data

Moving Average

Standard Deviation

Skewness

Kurtosis


Segment Waveform - Frequency Domain Views. The user can define a segment of the waveform and get the Frequency Domain plots for this segment.



Signal Processing (DSP): The user can apply frequency filtering and windowing to any wave view. The parameters are:

Windowing type, Filter-Design, Filter-Type (Band-Pass etc), Filter-Order and Low and High Frequency.



Dedicated toolbar for:

1. Change immediately plot type

2. Navigation between waveforms (First, Next, Previous, Last)

3. Select navigation mode: – Global Navigation: Synchronize all waveform views of a data set so that they display the same

waveform

– Auto Select First: Navigating through the waveforms will cause the record of the first waveform to be selected.

– Mouse Select: Once activated the user can double click on any waveform and the corresponding record will be selected.

Navigation between Waveforms and Plots


Feature extraction for each waveform with user defined settings.

Note: Multiple hit extraction - Noesis will actually perform a ‘Post Test Acquisition’ and will extract hits using the new settings.

Feature Extraction (1)


Different settings could be applied to each waveform

The user could define the feature he want to extract



• Option to keep original waveform

• Option to split waveform to any desired length

• Application - Noesis Feature Extraction of a very large WFS.



WFS files: Noesis can load WFS files as they are acquired. Depending on

classifier Noesis will extract features and break-down a single WFS wave to

multi-hits and classify the data.

Live-SPR. Real-time data classification and

processing. (1)


In parallel with live classification Noesis can compute a variety of Periodic

Statistics that follow cluster evolution based on calculated parameters real-

time. This feature is also available during post-processing.


processing. (2)



processing. (3)

Data scatter plot with

the data classified

immediately with

acquisition.

Class velocity graphs,

showing how fast the

center of one class

approaches or moves

away from the center of

the reference class or

point.

Cluster distance,

showing the evolution

of cluster center

distances in time.

Cluster size, showing

the evolution of the

cluster data in time.

Documents

Topic: Waveforms in Noesis Marketing Old... · 2011-05-24 · Noesis – Waveforms Capabilities Noesis main features relating to Waveforms: 1. Import of multiple waveforms from several