Remote focusing of elastic waves in complex structures using time reversal of acoustic waves

2018 ◽  
Vol 144 (3) ◽  
pp. 1795-1795
Author(s):  
Maxime Farin ◽  
Claire Prada ◽  
Julien de Rosny
Keyword(s):  
Time Reversal ◽  
Elastic Waves ◽  
Acoustic Waves ◽  
Complex Structures

Backscattering time‐reversal of acoustic waves in random media

1999 ◽  
Vol 105 (2) ◽  
pp. 956-956
Author(s):  
Arnaud Tourin ◽  
Arnaud Derode ◽  
Mathias Fink
Keyword(s):  
Time Reversal ◽  
Acoustic Waves ◽  
Random Media

Dynamic time reversal of randomly backscattered acoustic waves

1999 ◽  
Vol 47 (2) ◽  
pp. 175-181 ◽  
Author(s):  
A Tourin ◽  
A Derode ◽  
M Fink
Keyword(s):  
Time Reversal ◽  
Acoustic Waves ◽  
Dynamic Time

Experimental investigation of time-reversal of photo-acoustic waves

2006 ◽  
Author(s):  
Emmanuel Bossy ◽  
Gabriel Montaldo ◽  
Michael Tanter ◽  
Benoit Forget ◽  
François Ramaz ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Time Reversal ◽  
Acoustic Waves

Two-Axis Solid-State Microgyroscope on Surface Acoustic Waves

2019 ◽  
Vol 20 (5) ◽  
pp. 299-307
Author(s):  
V. P. Sizov ◽  
V. N. Pogorelov ◽  
Yu. V. Vakhtin
Keyword(s):  
Solid State ◽  
Elastic Waves ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Oscillation Amplitude ◽  
Substrate Layer ◽  
Production Technologies ◽  
Wave Models ◽  
And Control ◽  
High Degree

This article focuses on the development of a two-axis solid state micro gyroscope (SMG) on surface acoustic waves (SAW). The described gyroscope belongs to the category of inexpensive sensing elements featuring a high degree of longtime overload stability. This advantage seems to make SAW SMGs a priority choice for navigation and control systems functioning in severe overload environments of up to 65,000 g. As of today SAW SMGs are designed according to a number of known principles. Such SMGs may also operate on standing SAWs or traveling SAWs. This article addresses the first gyro type. Unfortunately, the existing standing SAW SMGs share a common limitation of measuring angular rates in relation to one axis only. This research attempts to introduce an innovative two-axis standing SAW SMG. The influence of the basis rotation on the parameters of the elastic waves traveling within the substrate layer was carefully studied. Incident and reflected wave models were also elaborated. The numerical simulation results demonstrate the effects of the basis rotation on the complex factors of the volume waves reflected by the substrate layer and on the phase velocity and frequency thereof as well as on the oscillation amplitude of the particles involved in SAW transition, and on the elliptical particle movement path configuration. Also, the SAW SMG is compared to the existing micromechanical gyroscopes, and the basic SAW SMG production technologies are reviewed.

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