Results 271 to 280 of about 148,229 (333)

Magnetometer Bias Insensitive Magnetic Field Matching Based on Pedestrian Dead Reckoning for Smartphone Indoor Positioning

IEEE Sensors Journal, 2022
Magnetic field signals are ubiquitous, stable, and have little effect on the human body. Due to these qualities magnetic field matching (MFM) has become a popular indoor positioning method and has attracted considerable attention within the smartphone ...
Jian Kuang, Taiyu Li, X. Niu
semanticscholar   +1 more source

Portable Diamond NV Magnetometer Head Integrated With 520 nm Diode Laser

IEEE Sensors Journal, 2022
The integrated diamond nitrogen vacancy (NV) magnetometer has attracted considerable attention in recent years and presents high potential for its use in magnetic field detection in fields such as aerospace, medical, and agriculture. A laser with a large
Xuemin Wang, Doudou Zheng, Xiaochen Wang, Xinyu Liu, Qimeng Wang, Junzhi Zhao, Hao Guo, Li Qin, Jun Tang, Zongmin Ma, J. Liu   +10 more
semanticscholar   +1 more source

Effects of Probe Laser Intensity on Co-Magnetometer Operated in Spin-Exchange Relaxation-Free Regime

IEEE Transactions on Instrumentation and Measurement, 2022
The probe laser intensity working point optimization of the co- magnetometer operated in the spin-exchange relaxation-free (SERF) regime is studied theoretically and experimentally in this article. Based on the steady-state solution of the Bloch equation,
Yang Fu, Wenfeng Fan, J. Ruan, Y. Liu, Zheng Lu, W. Quan   +5 more
semanticscholar   +1 more source

An Integrated High-Sensitivity VCSEL-Based Spin-Exchange Relaxation-Free Magnetometer With Optical Rotation Detection

IEEE Sensors Journal, 2022
In the integrated design of spin-exchange relaxation-free (SERF) magnetometers, vertical cavity surface emitting laser (VCSEL) is a promising candidate as a light source.
Gui-Fang Zhang, Hongjiang Zeng, Gaobo Tan, Q. Lin   +3 more
semanticscholar   +1 more source

A High Sensitivity Closed-Loop Spin-Exchange Relaxation-Free Atomic Magnetometer With Broad Bandwidth

IEEE Sensors Journal, 2021
Spin-exchange relaxation-free (SERF) atomic magnetometers are the promising non-cryogenic sensors to potentially replace the superconducting quantum interference device (SQUID) in the ultra-weak magnetic-field measurements.
Qingqian Guo, Tao Hu, Chun-qiao Chen, Xiao-yu Feng, Zhongyi Wu, Yin Zhang, Ming-kang Zhang, Yan Chang, Xiaodong Yang   +8 more
semanticscholar   +1 more source

Magnetocardiography Measurements by Microfabricated Atomic Magnetometer With a 3-D Spherical Alkali Vapor Cell

IEEE Transactions on Instrumentation and Measurement, 2021
In the field of biomagnetic applications, including magnetocardiography (MCG), portable magnetic measurement is promising. This article demonstrates simulated MCG measurements using a microfabricated spin-exchange relaxation-free (SERF) atomic ...
Jin Zhang, Kangni Liu, Jianfeng Zhang, Ziji Wang, J. Shang   +4 more
semanticscholar   +1 more source

Ferromagnetic micromechanical magnetometer

Sensors and Actuators A: Physical, 2001
A novel micromechanical magnetometer has been designed, fabricated, and tested that consists of low-stress electrodeposited hard magnetic alloys and surface micromachined polysilicon structures. The sensor responds to applied magnetic fields without consuming any power and the magnitude of the response is scale independent. By optically measuring their
Henry H. Yang, N. V. Myung, Jeffrey Yee, D.-Y. Park, B.-Y. Yoo, Morton Schwartz, Ken Nobe, Jack W. Judy   +7 more
openaire   +1 more source

Continuous High-Sensitivity and High-Bandwidth Atomic Magnetometer

Physical Review Applied, 2020
Here we demonstrate an atomic magnetometer that has a bandwidth of more than 100 kHz and a sensitivity of $180\phantom{\rule{0.2em}{0ex}}\mathrm{fT/}\ensuremath{\surd}\mathrm{Hz}$ at a Fourier frequency of 8 Hz, and $0.7\phantom{\rule{0.2em}{0ex}}\mathrm{
Rujie Li, F. Baynes, A. Luiten, C. Perrella   +3 more
semanticscholar   +1 more source

Determination of Spin Polarization in Spin-Exchange Relaxation-Free Atomic Magnetometer Using Transient Response

IEEE Transactions on Instrumentation and Measurement, 2020
A novel method to determine the spin polarization and its distribution for a spin-exchange relaxation-free (SERF) atomic magnetometer are proposed in this paper.
Junpeng Zhao, M. Ding, Jixi Lu, Ke Yang, Danyue Ma, Han Yao, Bangcheng Han, Gang Liu   +7 more
semanticscholar   +1 more source