Ghaderi Nasser, Hasheminejad Navid, Dirckx Joris, Vanlanduit Steve
InViLab Research Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
SuPAR Research Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
Sensors (Basel). 2024 May 30;24(11):3518. doi: 10.3390/s24113518.
In this study, we investigate the potential of cold atmospheric plasma (CAP) as a non-contact excitation device, comparing its performance with an ultrasound transmitter. Utilizing a scanning Laser Doppler Vibrometer (LDV), we visualize the acoustic wavefront generated by a CAP probe and an ultrasound sensor within a designated 50 mm × 50 mm area in front of each probe. Our focus lies in assessing the applicability of a CAP probe for exciting a small polymethyl methacrylate (PMMA) sample. By adjusting the dimensions of the sample to resonate at the excitation frequency of the probe, we can achieve high vibrational velocities, enabling further mechanical analysis. In contrast with traditional vibration excitation techniques such as electrodynamical shakers and hammer impact excitation, a plasma probe can offer distinct advantages without altering the structure's dynamics since it is contactless. Furthermore, in comparison with laser excitation, plasma excitation provides a higher power level. Additionally, while pressurized air systems are applicable for limited low frequencies, plasma probes can perform at higher frequencies. Our findings in this study suggest that CAP is comparable with acoustic excitation, indicating its potential as an effective mechanical excitation method.
在本研究中，我们探究了冷大气等离子体（CAP）作为非接触式激发装置的潜力，并将其性能与超声发射器进行了比较。利用扫描激光多普勒测振仪（LDV），我们在每个探头前方指定的50毫米×50毫米区域内，可视化了由CAP探头和超声传感器产生的声波前。我们的重点在于评估CAP探头对激发小尺寸聚甲基丙烯酸甲酯（PMMA）样品的适用性。通过调整样品尺寸使其在探头的激发频率下共振，我们可以实现高振动速度，从而进行进一步的力学分析。与电动振动台和锤击激励等传统振动激发技术相比，等离子体探头由于是非接触式的，因此在不改变结构动力学的情况下可提供独特优势。此外，与激光激发相比，等离子体激发提供更高的功率水平。另外，虽然加压空气系统适用于有限的低频范围，但等离子体探头可以在更高频率下工作。我们在本研究中的发现表明，CAP与声激发相当，这表明其作为一种有效机械激发方法的潜力。
