Topic
Acoustic interferometer
About: Acoustic interferometer is a research topic. Over the lifetime, 1493 publications have been published within this topic receiving 19355 citations.
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13 Aug 1998
TL;DR: In this article, a sound generator and a receiver are arranged so that the flow channel is subjected to the sound waves passing between them, and the signals detected by the sound receiver are processed to detect gas.
Abstract: The method involves subjecting the liquid to sound waves which pass from a sound generator to a sound receiver, which may be both integrated into an acoustic system (5). The signals detected by the sound receiver are processed to detect gas. The associated arrangement contains a sound generator and receiver and a flow channel (1) in which the liquid flows. The generator and a receiver are arranged so that the flow channel is subjected to the sound waves passing between them. The acoustic system may be at one end of the channel and a mirror (6) may be at the other end of the channel.
1 citations
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16 Nov 2015
TL;DR: In this article, the characteristics of shear-horizontal direct and backward acoustic waves of the higher orders propagating in XY potassium niobate plates in band including the cutoff frequencies have been theoretically investigated.
Abstract: In the paper the characteristics of shear-horizontal direct and backward acoustic waves of the higher orders propagating in XY potassium niobate plates in band including the cutoff frequencies have been theoretically investigated. It also has been theoretically investigated the influence of nonviscous and nonconductive liquid on their properties. It has been found that the presence of liquid are reduced the velocity of waves under study. The range of the backward wave existence is increased with increasing of the wave order number.
1 citations
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10 Sep 2002TL;DR: In this article, a direct current sensor based on all-fiber Mach-Zehnder interferometer is demonstrated, where the phases of interferometric lights are modulated by heat effect when current flowing through a thin metal tube.
Abstract: A direct current sensor based on all-fiber Mach-Zehnder interferometer is demonstrated in this paper. The phases of interferometric lights in the interferometer is modulated by heat effect when current flowing through a thin metal tube. The charactersistics of current sensing are studied experimentally. Adopting the wavelength scale method, in the case of elimination of environmental perturbation, the wavelength changing range is 32nm when the current changes from 0 to 1.8A. The shifting wavelength is linear to the power and the linear fitting is 0.9987. The tuning efficiency is approximately 19.47nm/W.
1 citations
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TL;DR: In this paper, an acoustic interferometer was built and operated during nocturnal temperature inversions to detect atmospheric temperature differences between the surface air and that at 50 m above the ground.
1 citations