Latest Publications & Patents on Acoustics
This is our latest selection of worldwide publications and patents in english on Acoustics, between many scientific online journals, classified and focused on acoustic, sound waves, acoustic absorption, sound pressure, acoustic impedance, frequency response, reverberation, waveform and Doppler.
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A Frontier in Acoustic Sensing Technology
Published on 2025-02-22 by Yuanyuan Pan, Ke Xu, Ruiqiang Wang, Honghong Wang, Guodong Chen, Kai Wang @MDPI
Abstract: Lithium-ion batteries (LIBs) are widely used in the fields of consumer electronics, new energy vehicles, and grid energy storage due to their high energy density and long cycle life. However, how to effectively evaluate the State of Charge (SOC), State of Health (SOH), and overcharging behavior of batteries has become a key issue in improving battery safety and lifespan. Acoustic sensing technology, as an advanced non-destructive monitoring method, achieves real-time monitoring of the internal s[...]
Our summary: Frontier in Acoustic Sensing Technology. Evaluation of LIBs through non-destructive monitoring. Real-time monitoring and accurate evaluation of key parameters.
Acoustic Sensing Technology, Lithium-ion batteries, Ultrasonic testing technology, Acoustic emission technology
Publication
Research on Frequency-Modulated Continuous Wave Inverse Synthetic Aperture Ladar Imaging Based on Digital Delay
Published on 2025-02-21 by Ruihua Shi, Gen Sun, Yinshen Wang, Wei Li, Maosheng Xiang, Juanying Zhao @MDPI
Abstract: Inverse synthetic aperture ladar (ISAL) systems combine laser coherent detection technology with inverse synthetic aperture imaging methods, offering advantages such as compact size, long detection range, and high resolution. The traditional optical delay line technique is widely used in frequency-modulated continuous wave (FMCW) ISAL imaging systems, but its flexibility is limited, posing challenges for high-precision signal processing. Additionally, frequency modulation errors, atmospheric dis[...]
Our summary: Research proposes a signal processing method based on digital delay for FMCW ISAL imaging, aiming for high-resolution imaging of targets across several kilometers. The method includes flexible adjustment of reference signal delay, frequency shift correction, internal calibration signal generation, frequency modulation error estimation, and error compensation to enhance target imaging quality.
Frequency-Modulated Continuous Wave, Inverse Synthetic Aperture Ladar, Digital Delay, Signal Processing
Publication
Advanced Crystallization Methods for Thin-Film Lithium Niobate and Its Device Applications
Published on 2025-02-21 by Rongbang Yang, Haoming Wei, Gongbin Tang, Bingqiang Cao, Kunfeng Chen @MDPI
Abstract: Lithium niobate (LiNbO3) has remarkable ferroelectric properties, and its unique crystal structure allows it to undergo significant spontaneous polarization. Lithium niobate plays an important role in the fields of electro-optic modulation, sensing and acoustics due to its excellent electro-optic and piezoelectric properties. Thin-film LiNbO3 (TFLN) has attracted much attention due to its unique physical properties, stable properties and easy processing. This review introduces several main prepa[...]
Our summary: Advanced methods for preparing thin-film lithium niobate are discussed, along with its applications in various devices such as sensors, memories, and optical waveguides. The unique properties of lithium niobate make it a promising material for future photonic integrated circuits.
Crystallization Methods, Thin-Film Lithium Niobate, Device Applications, Electro-optic Modulation
Publication
An Optimized PZT-FBG Voltage/Temperature Sensor
Published on 2025-02-19 by Shangpeng Sun, Feiyue Ma, Yanxiao He, Bo Niu, Cheng Wang, Longcheng Dai, Zhongyang Zhao @MDPI
Abstract: The piezoelectric grating voltage sensor has garnered significant attention in the realm of intelligent sensing, attributed to its compact size, cost-effectiveness, robust electromagnetic interference (EMI) immunity, and high network integration capabilities. In this paper, we propose a PZT-FBG (piezoelectric ceramic–fiber Bragg grating) voltage–temperature demodulation optical path architecture. This scheme effectively utilizes the originally unused temperature compe[...]
Our summary: Optimized PZT-FBG voltage/temperature sensor with improved optical path connection method, synchronous demodulation of temperature and voltage parameters, enhanced linearity and resolution of voltage sensor.
PZT-FBG, voltage sensor, temperature sensor, optical path
Publication
Characterization and Optimization of Sound Transmission Loss of PVC Foam Sandwich Structure Reinforced by Carbon Fiber Columns
Published on 2025-02-19 by Kangle Li, Zhiwei Zhou, Jichao Lei, Lixian Wang, Wenkai Dong, Yongbo Jiang, Ying Li @MDPI
Abstract: This study presents a foam sandwich structure reinforced with carbon fiber columns (FSS-CFC), which exhibits strong mechanical and sound insulation properties. The FSS-CFC consists of two face-sheets and a polyvinyl chloride (PVC) core containing multiple CFC cylinders arranged in a periodic array. The sound transmission loss (STL) measured in acoustic tube experiments closely aligns with the finite element simulation results, validating the reliability of the present research. Through character[...]
Our summary: Foam sandwich structure reinforced with carbon fiber columns exhibits strong mechanical and sound insulation properties. Sound insulation mechanism of FSS-CFC identified through characteristic analyses. FSS-CFC optimized using genetic algorithm in MATLAB and COMSOL, showing significant improvements in both mechanical and acoustic performance.
Characterization, Optimization, Sound Transmission Loss, Carbon Fiber Columns
Publication
Research on the Damage Characteristics of a UAV Flight Control System Irradiated by a Continuous Laser
Published on 2025-02-19 by Le Liu, Chengyang Xu, Sheng Cai, Jiamin Wang, Dandan Huang, Kun Yang, Changbin Zheng, Jin Guo @MDPI
Abstract: To improve laser anti-UAV technology and UAV laser protection capabilities, research on continuous laser damage to a UAV flight control system has been carried out. Combining waveform and function monitoring, the performance of the flight control system under laser irradiation was observed in real time, and the temperature and ablation process were recorded, which were used to analyze its damage characteristics and thresholds. Our experimental results show that the flight control system had two [...]
Our summary: Research on damage characteristics of UAV flight control system irradiated by continuous laser, including temporary failure and permanent damage modes with specific temperature thresholds and power density requirements for damage. Thermal effects of laser on diodes and linear regulators analyzed for permanent damage assessment.
UAV, Flight Control System, Continuous Laser, Damage Characteristics
Publication
Doppler division multiplexing (ddm) multiple-input multiple-output (mimo) radar system and decoding method
Patent published on the 2025-02-19 in EP under Ref EP4509863 by NXP BV [NL] (Rosu Filip Alexandru [nl], Brigalda Adriana [nl], Silion Daniel [nl])
Abstract: A radar system may include transmitter modules configured to transmit multiple transmit signals in accordance with a Doppler Domain Multiplexing (DDM) scheme, receiver modules configured to receive reflections from the plurality of transmit signals reflected off an object and to generate corresponding digital signals, and a signal processor configured to generate a range-Doppler antenna cube representing the digital signals, and, for each of range bin of the cube, to generate a decoded range-Dop[...]
Our summary: Radar system with DDM and MIMO technology for signal processing and peak identification in range-Doppler antenna cube.
Doppler division multiplexing, multiple-input multiple-output, radar system, decoding method
Patent
Improved radar detection using prior tracked object information
Patent published on the 2025-02-19 in EP under Ref EP4509864 by NXP BV [NL] (Chan Lu Lu [nl], Gehrels Cornelis [nl], Sari Alp [nl], Kaneko Takeshi [nl], Paker ÖzgÜn [nl], Koppelaar Arie Geert Cornelis [nl])
Abstract: A system includes a processor and a non-transitory computer-readable medium storing machine instructions that cause the processor to perform a first fast Fourier transform (FFT) on received radar data to obtain a range-antenna data array and to perform a second FFT on the range-antenna data array to obtain a range-Doppler-antenna data cube. The processor performs peak detection on the range-Doppler-antenna data cube based on object information to obtain a subset that includes confirmed peaks and[...]
Our summary: Improved radar detection through peak detection and angle of arrival calculations using prior tracked object information for filtering candidate peaks.
radar detection, fast Fourier transform (FFT), peak detection, angle of arrival calculations
Patent
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