Laser interferometry: particle motion/strain estimation (surface measurements)

This dataset contains time-domain measurements of ultrasonic wave propagation in a resin cylindrical specimen excited by piezoelectric transducers (PZTs) and observed using a laser interferometer. The objective is to provide synchronized electrical actuation/response traces together with interferometric surface-motion measurements at multiple positions, enabling analysis such as particle displacement/velocity comparison across locations, time-of-flight estimation, and (with an assumed or calibrated wave speed) strain estimation.

Experimental principle and setup:
An AWG drives a TX amplifier connected to a PZT actuator mounted on one end of the resin cylinder, while an identical PZT at the opposite end is measured via an RX amplifier. PZT_TX/PZT_RX and the laser interferometer output are recorded on the same oscilloscope time base; the interferometer measures surface motion at four reflector positions (R1–R4) along the cylinder.

Data Organization:
All files are under the top-level folder “Laser_Interferometer_Dataset/”. Subfolders correspond to the actuation waveform (and, where indicated, the amplitude condition encoded in the folder name): “Gaussian_Input_20AmpInput_30AmpOutput/”, “Hamming_Input/”, “Hamming_Input_20AmpInput_30AmpOutput/”, “Hanning_Input/”, “Rectangle_Input/”, “Rectangle_Input_20AmpInput_30AmpOutput/”, and “Sinuous_Input/”. Each waveform folder contains the same set of Excel-compatible time-series files: “Pos_R1_Disp”, “Pos_R2_Disp”, “Pos_R3_Disp”, “Pos_R4_Disp” (interferometer displacement at positions R1–R4), “Pos_R1_Vel”, “Pos_R2_Vel”, “Pos_R3_Vel”, “Pos_R4_Vel” (particle velocity at R1–R4), and “PZT_TX”/“PZT_RX” (oscilloscope electrical traces of actuator drive and receiver response). Each file contains the recorded time vector and the corresponding measured signal (units as provided in the file).