Results 71 to 80 of about 32,854 (304)

Broadband Ultrasonic Location Systems for Improved Indoor Positioning [PDF]

, 2006
Ultrasonic location systems are a popular solution for the provision of fine-grained indoor positioning data. Applications include enhanced routing for wireless networks, computer-aided navigation, and location-sensitive device behavior. However, current
Mike Hazas, Hopper, Andy, Andy Hopper, Hazas, Michael   +3 more
core  

1-3 Piezocomposite design optimised for high frequency kerfless transducer arrays [PDF]

, 2009
Piezocomposites that can operate at frequencies above 30 MHz without spurious modes are required in order to develop sufficiently sensitive high frequency arrays for high resolution imaging.
Dauchy, F., Garcia-Gancedo, L, Démoré, CEM, T.W. Button, Cochran, S, Bamber, J.C., C.E.M. Demore, Démoré, C.E.M., Garcia-Gancedo, L., J.C. Bamber, ,, Cochran, S., Dauchy, F, L. Garcia-Gancedo, Button, TW, S. Cochran, Bamber, JC, Button, T.W., F. Dauchy   +18 more
core   +1 more source

CONTRIBUTION IN CALCULATION OF ULTRASONIC TRANSDUCERS USED IN METAL REWORKING PROCESS BY WELDING IN ULTRASONIC FIELD

Nonconventional Technologies Review, 2017
The paper presents the calculation and construction elements for the ultrasonic transducer system used in reworking by welding in ultrasonic field.The transducer is modeled by the finite element method analysis to determine the diagram of particle ...
Gheorghe Amza, Dan Nitoi, Zoia Amza
doaj  

Natural Biomaterials for Osteochondral Repair: From Source to Strategy

Advanced Healthcare Materials, EarlyView.
Biological origin‐guided overview of natural biomaterials and therapeutic strategies for osteochondral tissue engineering. The circular diagram categorizes representative materials and strategies into plant/algae‐derived, microbial‐derived, animal‐derived, and human‐derived sources, centered on an osteochondral defect repair model.
Hengyu Liu, Hanyang Zhang, Wenbo Yang, Hao Chen, Jincheng Wang, Fei Chang   +5 more
wiley   +1 more source

On the development and testing of a guided ultrasonic wave array for structural integrity monitoring

, 2006
The prototype of a guided ultrasonic wave array for the structural integrity monitoring of large, plate-like structures has been designed, built, and tested.
Wilcox, PD, Fromme, P, Cawley, P, Canvley, P, Lowe, MJS   +4 more
core   +1 more source

Flexural ultrasonic transducer [PDF]

, 2021
A flexural ultrasonic transducer is disclosed. The ultrasonic transducer comprises a sealed case which includes a flexible membrane and which defines a sealed cavity. The sealed case has an inside and an outside.
Dixon, Steve, Kang, Lei, Feeney, Andrew
core  

Study on energy transmission through metal wall based on piezoelectric material

MATEC Web of Conferences, 2016
The efficiency of electric energy transmission through metal wall by ultrasonic wave mainly depends on the relevant parameter of the sandwich structure system, which is consist of a transit piezoelectric transducer, a receive piezoelectric transducer and
Sun Yun-zhe, Yang Ding-xin, Hu Zheng, Hu Hai-feng, Hou Bao-jian   +4 more
doaj   +1 more source

The Dynamic Performance of Flexural Ultrasonic Transducers [PDF]

Sensors, 2018
Flexural ultrasonic transducers are principally used as proximity sensors and for industrial metrology. Their operation relies on a piezoelectric ceramic to generate a flexing of a metallic membrane, which delivers the ultrasound signal. The performance of flexural ultrasonic transducers has been largely limited to excitation through a short voltage ...
Andrew Feeney, Lei Kang 0005, George Rowlands, Steve Dixon   +3 more
openaire   +5 more sources

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

Advanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong, You Zhou, Qingxiu Li, Wenyu Zhao, Sunyingyue Geng, Hangfei Li, Yan‐Bing Leng, Shirui Zhu, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Ye Zhou, Su‐Ting Han   +12 more
wiley   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source