DOI: 10.5061/dryad.98sf7m0th
title: Data from crosstalk in DAQ-based measurement platforms for structural health monitoring: Effects on damage detection and mitigation methods

description: This dataset is directly related to the scientific paper "Crosstalk
 in DAQ-Based Measurement Platforms for Structural Health Monitoring:
 Effects on Damage Detection and Mitigation Methods" published in the
 journal Measurement Science and Technology. The study presents a
 comprehensive experimental analysis of crosstalk between analog channels
 of data acquisition (DAQ) devices and its effects on structural health
 monitoring (SHM) systems based on electromechanical impedance (EMI), Lamb
 waves and acoustic emission (AE) methods. The data are organized in
 directories corresponding to the paper figures and are text files obtained
 from the electrical impedance measurements of piezoelectric transducers
 related to the EMI method and voltage signals related to the Lamb and AE
 methods. In each case, data were obtained under conditions without
 crosstalk and under the effect of crosstalk. Mitigation methods based on
 the frequency response function (FRF) and the use of voltage followers
 were evaluated. 
description: # Crosstalk in DAQ-based measurement platforms for structural health
 monitoring: Effects on damage detection and mitigation methods Dataset
 DOI: [10.5061/dryad.98sf7m0th](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](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.