Results 71 to 80 of about 118,033 (340)

Displacement and Vibration Measurements with Interferometers: Benchmark Configurations, Performance, and R&D Opportunities

Advanced Photonics Research, EarlyView.
Self‐mixing interferometry is a powerful technique that brings together the exceptional sensitivity of phase measurements with the unequalled simplicity of the self‐mix configuration based on modulation of the cavity field induced by the return from the target. According to the selected measurand, displacement or vibration, and to the analog of digital
Silvano Donati
wiley   +1 more source

A Method for Evaluating the Electro-Mechanical Characteristics of Piezoelectric Actuators during Motion

Sensors, 2012
The electro-mechanical characteristics of piezoelectric actuators which have being driven are evaluated in this paper. The force generated by actuators is measured as an inertial force of a corner cub prism which is attached to the actuators. The Doppler
Hongzhi Jia, Yusaku Fujii, Akihiro Takita, Mitra Djamal, Wenmei Hou, Tao Jin   +5 more
doaj   +1 more source

Rotational Doppler shift of the phase-conjugated photon

, 2011
The rotational Doppler shift of a photon with orbital angular momentum $\pm \ell \hbar$ is shown to be an even multiple of the angular frequency $\Omega$ of the reference frame rotation when photon is reflected from the phase-conjugating mirror.
A. Yu. Okulov, Abramochkin, Allen, Arlt, Baier, Basov, Beth, Bhattacharya, Bialynicki-Birula, Courtial, Courtial, Durnin, Felde, Foucault, Franke-Arnold, Garetz, Lavery, Leach, Lebedev, MacDonald, Mamaev, Nienhuis, Nowak, Okulov, Okulov, Okulov, Puppe, Shirasaki, Sipe, Sternklar, Volke-Sepulveda, Wei, Woerdemann   +32 more
core   +1 more source

Integration of Soft‐Robotics and Deep Learning to Assess the Coordinated Biosonar Emission and Reception Dynamics in Hipposiderid Bats

Advanced Robotics Research, EarlyView.
Combining a biomimetic soft‐robot with deep‐learning data analytics sheds light on a unique peripheral dynamics seen in the biosonar system of bats: Bats modulate their ultrasonic biosonar signals upon emission as well as reception with variable, yet highly coordinated motion patterns of their noseleaves and pinnae.
Shuxin Zhang, Ruihao Wang, Xiaoyan Yin, Luhui Yang, Rolf Müller   +4 more
wiley   +1 more source

A Closed-Form Solution for 3D Source Localization Using Angles and Doppler Shifted Frequencies [PDF]

, 2023
Zhu Jian-Dong, Ding Ting, Qiao Lijuan
openalex   +1 more source

Reverse Doppler effect in backward spin waves scattered on acoustic waves

, 2009
We report on the observation of reverse Doppler effect in backward spin waves reflected off of surface acoustic waves. The spin waves are excited in a yttrium iron garnet (YIG) film. Simultaneously, acoustic waves are also generated.
A. A. Serga, A. Jander, A. V. Chumak, B. Hillebrands, C. Doppler, C. H. Papas, D. D. Stancil, P. Dhagat, S. Hanna, V. E. Pafomov, V. G. Veselago, V. G. Veselago, Yu. V. Gulyaev   +12 more
core   +1 more source

A Quadruped Piezoelectric Ultrasonic Actuating Robot with Foot‐Leg‐Trunk‐Integrated Structure

Advanced Robotics Research, EarlyView.
This study proposes a novel foot‐leg‐trunk‐integrated quadruped piezoelectric ultrasonic actuating robot with small size and lightweight. A hybrid vibration mode combining the first‐order out‐of‐plane bending vibration of the trunk and the first‐order horizontal bending vibration of driving legs is designed to generate elliptical trajectories at foot ...
Jie Deng, Yue Zhang, Xinchao Hao, Jing Li, Shijing Zhang, Yingxiang Liu   +5 more
wiley   +1 more source

Modulus‐Switchable Miniature Robots for Biomedical Applications: A Review

Advanced Robotics Research, EarlyView.
Materials, robot designs, proof‐of‐concept functions, and biomedical applications of modulus‐switchable miniature robots. Miniature soft robots have shown great potential in biomedical applications due to their excellent controllability and suitable mechanical properties in biological environments.
Chunyun Wei, Yibin Wang, Jiangfan Yu
wiley   +1 more source

The design of multiple orthogonal signals based on auto-encoder optimization network

Frontiers in Marine Science
As an important part of active sonar, transmitted signals have a great influence on the performance of ocean exploration, however, in the actual environment, due to the existence of the Doppler frequency shift, the traditional transmitted signals may ...
Binkai Liang, Mingzhi Wang, Sen Zhang
doaj   +1 more source

The rotational Doppler effect and the rotational frequency shift

, 2004
The rotational frequency shift (RFS) has been investigated. The existence of the RFS, previously proposed [Phys. Rev. Lett., 78, 2539 (1997)], has been explicitly demonstrated experimentally for the first time, for different quantum systems and frequency regimes.
openaire   +2 more sources