Results 111 to 120 of about 23,063 (293)

Low-Frequency Piezoelectric Hydrophone with High Sensitivity Based on a Piston Structure

Acoustics
Low-frequency hydrophones are used to detect underwater low-frequency acoustic signals and are widely applied in marine science, resource exploration, environmental monitoring, and military operations.
Zhenming Piao, Tianyuan Hou, Yuhang Wang, Junye Tong, Hamadullah Panhwar, Yanxin Lv, Yi Xin   +6 more
doaj   +1 more source

Optimizing Piezoelectric Stack Preload Bolts in Ultrasonic Transducers

Physics Procedia, 2015
AbstractThe selection of the preload bolt is often an afterthought in the design of Langevin type “sandwich” transducers, but quite often it is the root cause of failure for power ultrasonic applications. The main role of the preload bolt is to provide a “prestress” in the piezo stack to prevent interface “gapping” or tension in glued joints which can ...
DeAngelis, D.A., Schulze, G.W., Wong, K.S.   +2 more
openaire   +1 more source

Shaping Carbon Nitrides for Advanced Macrostructures

Advanced Materials Technologies, EarlyView.
This review examines how carbon nitride can be shaped through a range of printing and interfacial assembly methods. By bringing together additive manufacturing and liquid–liquid structuring concepts, carbon nitride is moving beyond its traditional powder‐based photocatalyst form toward digitally designed robust macroscale architectures with high design
Simona Baluchová, Baris Kumru
wiley   +1 more source

Cavity piezooptomechanics: piezoelectrically excited, optically transduced optomechanical resonators

, 2013
We present a monolithic integrated aluminum nitride (AlN) optomechanical resonator in which the mechanical motion is actuated by piezoelectric force and the displacement is transduced by a high-Q optical cavity.
Fan, Linran, Sun, Xiankai, Tang, Hong X., Xiong, Chi   +3 more
core   +1 more source

Microstructured Electrode‐Piezopolymer Interface for Ultrasound Transducers With Enhanced Flexibility and Acoustic Performance

Advanced Materials Technologies, EarlyView.
Flexible piezopolymer ultrasound transducers are engineered by tailoring the electrode–piezopolymer interface using metallic, flake‐based, and porous graphene electrodes. Laser‐induced graphene's porous structure enables polymer infiltration, strengthening interfacial coupling and enhancing piezoelectric response and acoustic output.
Spencer Hagen, Dulcce A. Valenzuela, Parag V. Chitnis, Shirin Movaghgharnezhad   +3 more
wiley   +1 more source

Densely distributed and real-time scour hole monitoring using piezoelectric rod sensors [PDF]

, 2019
This study aims to validate a piezoelectric driven-rod scour monitoring system that can sense changes in scour depth along the entire rod at its instrumented location.
Funderburk, Morgan L, Huang, Shieh-Kung, Loh, Chin-Hsiung, Loh, Kenneth J   +3 more
core  

Soft Actuators Integrated with Control and Power Units: Approaching Wireless Autonomous Soft Robots

Advanced Robotics Research, EarlyView.
Soft robots exhibit significant development potential in various applications. However, there are still key technical challenges regarding material improvement, structure design and components integration. This review focuses on the development and challenge of soft actuators, power components, and control components in untethered intelligent soft ...
Renwu Shi, Feifei Pan, Xiaobin Ji
wiley   +1 more source

Bond Graph Modeling and Simulation of Hybrid Piezo-Flexural-Hydraulic Actuator

Engineering Proceedings
In this study, a hybrid piezo-flexural-hydraulic actuator is modeled and simulated using bond graph methodology. The hybrid actuator comprises piezoelectric stack actuator, mechanical flexural amplifier, and hydraulic piston actuator.
Rudraksha Kelkar, Mohith Santhya, Mithun Kanchan, Omkar S. Powar   +3 more
doaj   +1 more source

High-overtone Bulk-Acoustic Resonator gravimetric sensitivity: towards wideband acoustic spectroscopy

, 2015
In the context of direct detection sensors with compact dimensions, we investigate the gravimetric sensitivity of High-overtone Bulk Acoustic Resonators, through modeling of their acoustic characteristics and experiment. The high frequency characterizing
Ballandras, S., Baron, T., Carry, E., Friedt, J. -M, Lebrasseur, E., Rabus, D.   +5 more
core   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source