Effect of couplant materials on signal transmission

Published: 3 July 2023| Version 1 | DOI: 10.17632/k8xyz8jr7j.1
Ronghua Xu


- The signal response of four different couplant materials, namely acrylic adhesive pads, honey, vaseline and hot glue, when stimulated by ultrasonic signals, was recorded using a laser Doppler vibrometer. A reference measurement without any coupalnt materials on the measuring side was also conducted. The data is stored in the directory "Laser_Doppler_vibrometer_measurements" organized by each couplant material. - Additionally, the impact of these couplant materials on signal transmission in a piezoelectric sensor was analyzed through acoustic emission measurements. The data is stored in the directory "AE_measurements" sorted for each couplant material.


Steps to reproduce

For laser Doppler vibrometer measurements: - The laser Doppler vibrometer measurements were performed by mounting a V101-RB ultrasonic transducer, manufactured by Olympus, on one side of a test steel plate. was mounted on one side of a test steel plate and stimulated using a discrete frequency sweep generated by a RITEC SNAP RAM 5000 ultrasonic wave generator. The sweep consisted burst signals with a pre-defined width of 0.4 ms, covering frequencies ranging from 50 kHz to 1 MHz in increments of 5 kHz. - On the other side, a digital single-point laser Doppler vibrometer Nova-Speed-DF, equipped with an invisible short wavelength infrared (SWIR) laser (1550 nm) was utilized to detect the out-of-plane velocity. - The data was acquired using a PicoScope 4424A oscilloscope using a sampling frequency of 80 MHz. For Acoustic emission measurements: - On one side of the steel plate, the same test setup as for laser Doppler vibrometer measurements was used, including the same ultrasonic transducer and the same source signals. - A piezoelectric sensor VS30-V, manufactured by Vallen Systeme GmbH, was coupled with test materials and fixed on the measuring side of the steel plate and connected to a measuring system AMSY6. - The data was acquired using a sampling frequency of 5 MHz.


Technische Universitat Dresden


Laser, Non-Destructive Testing, Acoustic Emission Testing, Signal Transmission


Bundesministerium für Wirtschaft und Klimaschutz