Article
Chemistry, Analytical
Lukasz Scislo
Summary: In the current economic situation, companies need to reduce production time without compromising on product quality. This article proposes the use of modern solutions like optical measurement systems to perform quality control without additional stoppage time. By using the Laser Doppler Vibrometer, the measurement process can be completed quickly for each product. The article also introduces a quality assurance algorithm that compares each product's modal responses to an ideal template and stores this information in the cloud, making it suitable for a factory quality management system based on the Industry 4.0 concept.
Article
Engineering, Electrical & Electronic
Alison E. Hake, Chuming Zhao, Wang-Kyung Sung, Karl Grosh
Summary: The study introduces a piezoelectric MEMS accelerometer designed for auditory prostheses, providing analytic models for sensitivity and noise to optimize sensor designs. An experimental device with high sensitivity and low input noise was tested, showing promising results for potential applications in auditory prostheses.
IEEE SENSORS JOURNAL
(2021)
Review
Chemistry, Analytical
Jiong Pan, Chenyu Bai, Qincheng Zheng, Huikai Xie
Summary: In the last decade, piezoelectric micromachined ultrasonic transducer (pMUT) rangefinders have experienced rapid development. These rangefinders have attracted extensive attention for mobile range-finding due to their high output pressure for long-range detection and low power consumption (16 µW for over 1 m range detection has been reported). Various strategies, including the utilization of pMUT arrays, advanced device structures, and novel piezoelectric materials, as well as improvements in range-finding methods, have been developed to enhance the performance of pMUT rangefinders. This work provides a brief introduction to the working principle of pMUT rangefinders, followed by an extensive overview of recent advancements that improve their performance, including advanced pMUT devices and range-finding methods used in pMUT rangefinder systems. Additionally, several derivative systems of pMUT rangefinders enabling broader applications are presented.
Article
Chemistry, Analytical
Yoon-Soo Shin, Junhee Kim
Summary: A new liquid level measurement system, combining a Laser Doppler Vibrometer and a stepwise rotating galvanometer scanner, was developed to observe liquid sloshing in a Tuned Liquid Damper (TLD). This system can measure the liquid level at multiple points simultaneously with a single laser point, effectively evaluating the natural frequency and mode shape of the liquid damper.
Article
Chemistry, Multidisciplinary
Yingchao Luo, Huazhen An, Xiaobing Li, Genqiang Jing
Summary: This paper proposes a novel high-precision dynamic measuring method based on the measuring principle of LDV, and constructs a compact dynamic measuring device. The laser beam incident angle is computed by simulating various tangential velocities and establishing a projection relationship. Experimental results show the feasibility of this method, and corresponding optimization measures are proposed to improve the measuring accuracy.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Zhide Huang, Guihong Zhang, Mowen Xie, Yan Du
Summary: In this study, the vibration frequency of steel rod-type short suspenders was accurately detected using Laser Doppler Vibrometer, and the tension force state was evaluated through regression analysis. The results showed a good correlation between vibration frequency and tension force, with aspect ratio playing a significant role in the change of vibration frequency.
APPLIED SCIENCES-BASEL
(2022)
Article
Nuclear Science & Technology
Botao Zhang, Shengjie Gong, Fujun Gan, Chaozhu Zhang, Hanyang Gu
Summary: Two experiments were conducted in this study to develop a feasible method for measuring FIV of both spacer grid and rod. The first experiment involved verification tests between LDV and piezoelectric accelerometer, while the second experiment utilized LDV to measure the FIV of a specified 4 x 4 rod bundle with spacer grids. Results showed strong vortex-induced resonance and increasing vibration intensity with flow velocity, along with the discovery of 'lock-in' phenomenon and two types of vortex shedding.
ANNALS OF NUCLEAR ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Vinay Kumar Srivastava, Jaspreet Singh, Parlad Kumar, Sataypal Singh Arora, Satinder Pal Singh, Surinder Singh
Summary: A comparative study was conducted to compare the performance of ZnO and AlN thin films for piezoelectric sensor applications. The thin films were characterized using various material characterization techniques, and MIM-based devices were fabricated with piezoelectric films as well. The results showed that AlN devices exhibited better output stability compared to ZnO devices.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Geosciences, Multidisciplinary
Yan Du, Mowen Xie
Summary: By proposing a cohesive safety factor and a relatively objective analysis method, unstable rock can be effectively identified, providing engineers with quantitative evaluation indices and criteria.
Article
Engineering, Electrical & Electronic
Vedant Sumaria, Srinivas Tadigadapa
Summary: Researchers demonstrated a thermal infrared detector based on a high quality-factor whispering gallery mode borosilicate glass microspherical shell resonator, which showed high sensitivity and temperature sensitivity. The experimental results showed excellent performance of the infrared sensor in the 1-20 μm wavelength range, with high noise-equivalent-power and responsivity, allowing for nanoscale measurements.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Marine
Hamid Hokmabady, Alireza Mojtahedi
Summary: The paper proposes a numerical model updating method considering both parametric and structural uncertainties on a passive controlled complex structural system. By calibrating the gas pressure and the total liquid column length of the TLCGD damping system, the discrepancy between the numerical and experimental data can be significantly decreased.
Article
Engineering, Electrical & Electronic
Michael G. Ruppert, Andrew J. Fleming, Yuen K. Yong
Summary: This study proposes a hybrid cantilever design with integrated piezoelectric actuators and piezoresistive sensors, which can overcome the current limitations of active microcantilevers and be fabricated using a commercial MEMS fabrication process.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Nanoscience & Nanotechnology
Jing Yan, Jun Ouyang, Hongbo Cheng, Peng Yan
Summary: BiFeO3 films with predominantly (100) orientation were successfully fabricated on Ti foils via RF-magnetron sputtering, showing excellent ferroelectric and piezoelectric properties suitable for metal-based MEMS.
SCRIPTA MATERIALIA
(2021)
Article
Engineering, Electrical & Electronic
V. Carluccio, L. Fachechi, V. M. Mastronardi, L. Natta, L. Algieri, G. de Marzo, F. Rizzi, M. De Vittorio
Summary: This paper reports on miniaturized flexible and compliant piezoelectric devices that can detect and discriminate localized pressures and contacts per unit area with minimal crosstalk. The best responsivity was obtained in samples with diameters of 200 and 500 μm, and crosstalk below -20 dB was observed with a minimum distance of 500 μm between the edges of closed sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Tong Xiao, Sipei Zhao, Xiaojun Qiu, Benjamin Halkon
Summary: This paper investigates the performance and challenges of using a retro-reflective film as an acoustic membrane pick-up with an LDV to form a remote acoustic sensing apparatus. Theoretical analysis and systematic experiments were conducted to characterize the membrane's performance, resulting in successful noise reduction and sound pressure level sensing. The demonstrated active control system showed a significant 22.4 dB noise reduction over a wide frequency range, showcasing the potential and advantages of this solution over traditional microphones.