Dataset DOI: 10.5061/dryad.98sf7m0th

Description of the data and file structure

This dataset is related to the scientific paper published in Measurement Science and Technology:

DOI: https://doi.org/10.1088/1361-6501/add30f

The data are text files and present the measurements obtained for methods based on electromechanical impedance (EMI), Lamb waves and Acoustic Emission (AE).

The data is organized in directories corresponding to each figure in the paper.

Directory "Figure4":

Example of crosstalk caused by a burst excitation signal

Signal acquired 3 times consecutively. Each text file corresponds to one acquisition.

First column: time [seconds]

Second column: Lamb wave signal [voltage, volts]

Signal sampled at a rate of 2 MSa/s (samples/second)

File Figure4.fig is a MATLAB figure obtained by averaging the data in the 3 text files.

Directory "Figure9":

Crosstalk effects in adjacent channels of a NI-USB-6361 DAQ device

Signal acquired four times consecutively. Each text file corresponds to one acquisition.

First column: time [seconds]

Second column: channel AI0 [voltage, volts]

Third column: channel AI1 (crosstalk) [voltage, volts]

Fourth column: channel AI2 (crosstalk) [voltage, volts]

Fifth column: channel AI3 (crosstalk) [voltage, volts]

Signals sampled at a rate of 250 kSa/s (samples/second)

File Figure9.fig is a MATLAB figure and shows the crosstalk signals obtained by averaging the data from the text files.

Directory "Figure10":

Worst-case crosstalk effects in adjacent channels of NI-USB-6366 and PXIe-5105 (PXIe-1071 platform) DAQ devices

For each DAQ device (USB-6366 and PXIe5105) , 4 signals were measured consecutively

DAQ USB-6366

First column: time [seconds]

Second column: channel AI0 [voltage, volts]

Third column: channel AI1 (crosstalk) [voltage, volts]

Fourth column: channel AI2 (crosstalk) [voltage, volts]

Fifth column: channel AI3 (crosstalk) [voltage, volts]

Signals sampled at a rate of 2 MSa/s (samples/second)

DAQ PXIe5105

First column: time [seconds]

Second column: channel 0  [voltage, volts]

Third column: channel 1 (crosstalk)  [voltage, volts]

Fourth column: channel 2 (crosstalk)  [voltage, volts]

Fifth column: channel 3 (crosstalk)  [voltage, volts]

Signals sampled at a rate of 10 MSa/s

File Figure10.fig is a MATLAB figure and shows the signals from the two DAQ devices obtained by averaging the data from the text files.

Directory "Figure11":

Power spectrum density (PSD) of worst-case crosstalk measured on three DAQ devices (USB-6361, USB-6366, and PXIe-5105)

First column: frequency [Hertz]

Other columns: PSDs for the respective channels (1, 2, 3, 4) [voltage^2/Hertz, Decibel]

File Figure11.fig is a MATLAB figure showing the PSDs obtained by averaging the data from the text files.

 Directory "Figure12":

Sampling rate and signal source impedance effects on crosstalk between adjacent analog input channels

DAQ device tested: USB-6361

Four resistances (loads) were tested with values ​​of 10, 100, 1k, 10k, 100k, 1M and 10M Ohms, as indicated in the name of the text files. For each case, the signals were obtained 4 times consecutively.

First column: Sampling rate [Sa/s - samples/second]

Second column: Crosstalk (CT) [Dimensionless, decibel scale]

File Figure12.fig is a MATLAB figure that shows the crosstalk curves obtained from the text file data, taking the average between the four acquisitions.

Directory "Figure13":

Lamb wave response signals of Sensors 1 and 2, showcasing the crosstalk effect on the simultaneous measurement of Sensor 2

Channels 0 and 1 of the DAQ device were sampled individually and simultaneously, as indicated in the text file names. For each case, four measurements were obtained sequentially.

First column: Channel 0 [voltage, volts]

Second column: Channel 1 [voltage, volts]

File Figure13.fig is a MATLAB figure showing the signals obtained from the text file data.

Directory "Figure14":

Acoustic emission response signals of Sensors 1 and 2, showcasing the crosstalk effect on the simultaneous measurement of Sensor 2.

First Column: Sensor 1  [voltage, volts]

Second Column: Sensor 2  [voltage, volts]

File Figure14.fig is a MATLAB figure and shows the two acoustic emission signals.

Directory "Figure15":

Sensor 2 impedance signatures measured individually, simultaneously with Sensor 1 and individually with small damage. 

Files named "Baseline_***" are the reference data (no damage). The damage and crosstalk conditions are indicated in the file names. For each condition 4 measurements were performed sequentially.

First column: frequency [Hertz]

Second column: real part of impedance, sensor 1 [ohm]

Third column: imaginary part of impedance, sensor 1 [ohm]

Fourth column: real part of impedance, sensor 2 [ohm]

Fifth column: imaginary part of impedance, sensor 2 [ohm]

File Figure15.fig is a MATLAB figure and shows the impedance curves obtained by taking the average of the data from the text files relating to the 4 measurements.

Directory "Figure16":

RMSD (root mean square deviation) damage index obtained for the crosstalk and small damage impedance signatures. 

Crosstalk and damage conditions are indicated in the file names.

First column: frequency subband [hertz]

Second column: RMSD index [dimensionless]

File Figure16.fig is a MATLAB figure showing the RMSD indices obtained from the text file data.

Directory "Figure17":

Sensor 2 impedance curves measured individually and simultaneously with Sensor 1, with and without mitigation by the FRF-based method

Each condition is indicated in the file name. For each condition, 4 measurements were obtained sequentially.

First column: frequency [Hertz]

Second column: real part of impedance, sensor 1 [ohm]

Third column: imaginary part of impedance, sensor 1 [ohm]

Fourth column: real part of impedance, sensor 2 [ohm]

Fifth column: imaginary part of impedance, sensor 2 [ohm]

File Figure17.fig is a MATLAB figure and shows the impedance curves obtained by taking the average of the data from the text files relating to the 4 measurements.

Directory "Figure19":

Sensor 2 impedance signatures measured individually and simultaneously with Sensor 1, with and without mitigation by the voltage follower-based method

Each condition is indicated in the file name. Files named "Baseline_***" are the reference data . For each condition, 4 measurements were obtained sequentially.

First column: frequency [hertz]

Second column: real part of impedance, sensor 1 [ohm]

Third column: imaginary part of impedance, sensor 1 [ohm]

Fourth column: real part of impedance, sensor 2 [ohm]

Fifth column: imaginary part of impedance, sensor 2 [ohm]

File Figure19.fig is a MATLAB figure and shows the impedance curves obtained by taking the average of the data from the text files relating to the 4 measurements.

Directory "Figure20":

RMSD damage index obtained for the crosstalk, small damage and crosstalk mitigated impedance curves using voltage follower and FRF method

Each condition is indicated in the file name

First column: frequency subband [hertz]

Second column: RMSD index [dimensionless]

File Figure20.fig is a MATLAB figure showing the RMSD indices obtained from the text file data

Directory "Figure21":

Comparison of FRF and voltage follower methods to mitigate crosstalk for acoustic emission (AE) and Lamb wave methods

The text file names indicate the data corresponding to the AE and Lamb wave signals, as well as the mitigation conditions.

For Lamb wave signals, 4 consecutive measurements were performed for each condition

First column: signal obtained on Channel 0 of the DAQ [voltage, volts]

Second column: signal obtained on Channel 1 of the DAQ [voltage, volts]

File Figure21.fig is a MATLAB figure and shows the signals corresponding to the data in the text files

Note: the signals related to the FRF method were processed directly in MATLAB by the authors and are not available in the text files, only in the MATLAB figure

Files and variables

File: Crosstalk_IOP-MST.zip

Description: 

The *.fig files are opened with MATLAB.

The *.txt files are text files and can be opened with any simple text editor.