Results 41 to 50 of about 2,219 (213)

Design of a 900 MHz Dual-Mode SWIPT for Low-Power IoT Devices

Sensors, 2019
This paper presents a duty cycle-based, dual-mode simultaneous wireless information and power transceiver (SWIPT) for Internet of Things (IoT) devices in which a sensor node monitors the received power and adaptively controls the single-tone or multitone
Hamed Abbasizadeh, Sang Yun Kim, Behnam Samadpoor Rikan, Arash Hejazi, Danial Khan, Young Gun Pu, Keum Cheol Hwang, Youngoo Yang, Dong In Kim, Kang-Yoon Lee   +9 more
doaj   +1 more source

Online Compensation of Phase Delay Error Based on P-F Characteristic for MEMS Vibratory Gyroscopes

Micromachines, 2022
In this paper, an online compensation method of phase delay error based on a Phase-Frequency (P-F) characteristic has been proposed for MEMS Coriolis Vibratory Gyroscopes (CVGs).
Xuewen Liu, Zhengcheng Qin, Hongsheng Li
doaj   +1 more source

Self-Calibration Method for the Four Buckets Phase Demodulation Algorithm in Triangular Wave Hybrid Modulation

Applied Sciences
The four buckets phase demodulation method is a widely used sinusoidal modulation and demodulation technique in interferometry. Strict calibration is essential to minimize nonlinear errors in subsequent measurements. The core of the algorithm calibration
Qi Liu, Shanyong Chen, Tao Lai, Guiqing Li, Jiajun Lin, Junfeng Liu   +5 more
doaj   +1 more source

Laser Self-Mixing Interferometer Based on Multiple Reflections and Phase-Modulation Technique

Photonics, 2022
An improved method combining multiple reflections with the phase-modulation technique (MR-PM) is proposed to construct a self-mixing interferometer with high accuracy.
Xiulin Wang, Liping Lv, Desheng Zhu, Hanqiao Chen, Wencai Huang   +4 more
doaj   +1 more source

Envelope demodulation method based on SET for fault diagnosis of rolling bearings under variable speed

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2020
Time-frequency analysis can effectively reveal the fault characteristics of rolling bearings under variable speed conditions. However, the traditional time-frequency analysis method cannot meet the requirements of anti-noise ability and time-frequency ...
Zengqiang MA, Xin LI, Suyan LIU, Yongjie GE, Feiyu LU   +4 more
doaj   +1 more source

Acousto-Optic Comb Interrogation System for Random Fiber Grating Sensors with Sub-nm Resolution

Sensors, 2021
The broad-frequency response and nanometer-range displacements of ultrasound detection are essential for the characterization of small cracks, structural health monitoring and non-destructive evaluation.
Dragos A. Poiana, Jose A. Garcia-Souto, Xiaoyi Bao   +2 more
doaj   +1 more source

Self-demodulation acoustic signatures for nonlinear propagation in glass beads

Comptes Rendus. Mécanique, 2003
The present Note describes some experimental work related to the nonlinear propagation of acoustic waves in granular media such as unconsolidated glass beads. The studied nonlinear effect is a self-demodulation process performed with the operation of the so-called parametric transmitting antenna.
Vincent Tournat, Bernard Castagnède, Vitalyi Gusev, Philippe Béquin   +3 more
openaire   +1 more source

Amplitude-Dependent Acoustic Absorber [PDF]

, 2022
In this chapter, we consider the design of 1D amplitude-dependent acoustic absorber, i.e., acoustic metamaterial composed of an air-filled waveguide periodically side-loaded by holes.
Zhang, Jiangyi
core   +2 more sources

AI‐Assisted Self‐Powered Wearable Dual‐Mode Sensor With TENG and Stretchable Optical Fiber for Neurological Disorder Diagnostics

Advanced Science, EarlyView.
This manuscript presents the WDMS platform, an AI‐assisted, self‐powered wearable dual‐mode sensor for tele‐neurology. It integrates a contact–separation TENG insole with stretchable polyurethane optical‐fiber strain sensors to synchronously track plantar pressure and lower‐limb muscle deformation.
Tianliang Li, Han Liu, Guoxu Liu, Qian'ao Wang, Haotian Zhou, Guiyi Liu, Yan Xu, Jun Wang, Zuqiang Wang, Feng Zhu, Feiling Luo, Zhong Lin Wang, Chi Zhang   +12 more
wiley   +1 more source

4.68 GHz, 2.35 kW Single Mode All-Fiber Amplifier Using Nonlinear Phase Demodulation for SBS Suppression and Spectral Compression

IEEE Photonics Journal
The output power of fiber lasers with narrow-linewidth is typically limited by stimulated Brillouin scattering (SBS). Spectral broadening via phase modulation is preferred to suppress SBS, but its capability approaches the limit for a given linewidth and
Mengqi Zhang, Hui Shen, Jinwei Xie, Chuanfa Jia, Zhao Quan, Tao Liu, Yunfeng Qi, Lei Zhang, Chunlei Yu   +8 more
doaj   +1 more source