Development of a thin high-frequency and high-precision magnetic probe array in Sino-United Spherical Tokamak

2021 ◽  
Vol 92 (5) ◽  
pp. 053518
Author(s):  
Zhengbo Cheng ◽  
Yi Tan ◽  
Zhe Gao ◽  
Shouzhi Wang ◽  
Binbin Wang ◽  
...  
Keyword(s):  
High Precision ◽  
High Frequency ◽  
Magnetic Probe ◽  
Spherical Tokamak ◽  
Probe Array

Note: Development of a multichannel magnetic probe array for magnetohydrodynamic activity studies in Sino-United Spherical Tokamak

2018 ◽  
Vol 89 (2) ◽  
pp. 026101 ◽  
Author(s):  
H. Zhong ◽  
Y. Tan ◽  
Z. Gao
Keyword(s):  
Magnetic Probe ◽  
Spherical Tokamak ◽  
Probe Array

High-Precision Simulation for Structure and Efficiency Optimization of High-Power High-Frequency Transformer

2020 ◽  
Author(s):  
Zheyuan Yi ◽  
Kai Sun ◽  
Shilei Lu ◽  
Guoen Cao ◽  
Yongdong Li ◽  
...  
Keyword(s):  
High Precision ◽  
High Power ◽  
High Frequency ◽  
Efficiency Optimization ◽  
High Frequency Transformer

scholarly journals Design and construction of high-frequency magnetic probe system on the HL-2A tokamak

AIP Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 125004
Author(s):  
S. Y. Liang ◽  
X. Q. Ji ◽  
T. F. Sun ◽  
Yuan Xu ◽  
J. Lu ◽  
...  
Keyword(s):  
High Frequency ◽  
Magnetic Probe ◽  
Probe System ◽  
Design And Construction

A 40 volt silicon complementary bipolar technology for high-precision and high-frequency analog circuits

2002 ◽  
Author(s):  
R. Bashir ◽  
J. De Santis ◽  
D. Chen ◽  
F. Hebert ◽  
A. Ramde ◽  
...  
Keyword(s):  
High Precision ◽  
Analog Circuits ◽  
High Frequency ◽  
Bipolar Technology

scholarly journals Fusion of GNSS and Speedometer Based on VMD and Its Application in Bridge Deformation Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 694 ◽  
Author(s):  
Ruicheng Zhang ◽  
Chengfa Gao ◽  
Shuguo Pan ◽  
Rui Shang
Keyword(s):  
Real Time ◽  
High Precision ◽  
High Frequency ◽  
Spectral Response ◽  
Low Frequency ◽  
Deformation Monitoring ◽  
Full Time ◽  
Dynamic Displacement ◽  
Mode Decomposition ◽  
Acceleration Sensors

Real-time dynamic displacement and spectral response on the midspan of Jiangyin Bridge were calculated using Global Navigation Satellite System (GNSS) and a speedometer for the purpose of understanding the dynamic behavior and the temporal evolution of the bridge structure. Considering that the GNSS measurement noise is large and the velocity/acceleration sensors cannot measure the low-frequency displacement, the Variational Mode Decomposition (VMD) algorithm was used to extract the low-frequency displacement of GNSS. Then, the low-frequency displacement extracted from the GNSS time series and the high-frequency vibration calculated by speedometer were combined in this paper in order to obtain the high precision three-dimensional dynamic displacement of the bridge in real time. Simulation experiment and measured data show that the VMD algorithm could effectively resist the modal aliasing caused by noise and discontinuous signals compared with the commonly used Empirical Mode Decomposition (EMD) algorithm, which is guaranteed to get high-precision fusion data. Finally, the fused displacement results can identify high-frequency vibrations and low-frequency displacements of a mm level, which can be used to calculate the spectral characteristics of the bridge and provide reference to evaluate the dynamic and static loads, and the health status of the bridge in the full frequency domain and the full time domain.

High frequency and high precision CMOS full-wave rectifier

2006 ◽  
Vol 93 (3) ◽  
pp. 185-199 ◽  
Author(s):  
M. Kumngern ◽  
K. Dejhan
Keyword(s):  
High Precision ◽  
High Frequency ◽  
Full Wave

scholarly journals High-Precision Acceleration Measurement System Based on Tunnel Magneto-Resistance Effect

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1117 ◽  
Author(s):  
Lu Gao ◽  
Fang Chen ◽  
Yingfei Yao ◽  
Dacheng Xu
Keyword(s):  
Magnetic Field ◽  
High Precision ◽  
Measurement System ◽  
Frequency Modulation ◽  
High Frequency ◽  
Low Noise ◽  
Acceleration Measurement ◽  
Field Source ◽  
Modulation Technique ◽  
Magneto Resistance

A high-precision acceleration measurement system based on an ultra-sensitive tunnel magneto-resistance (TMR) sensor is presented in this paper. A “force–magnetic–electric” coupling structure that converts an input acceleration into a change in magnetic field around the TMR sensor is designed. In such a structure, a micro-cantilever is integrated with a magnetic field source on its tip. Under an acceleration, the mechanical displacement of the cantilever causes a change in the spatial magnetic field sensed by the TMR sensor. The TMR sensor is constructed with a Wheatstone bridge structure to achieve an enhanced sensitivity. Meanwhile, a low-noise differential circuit is developed for the proposed system to further improve the precision of the measured acceleration. The experimental results show that the micro-system achieves a measurement resolution of 19 μg/√Hz at 1 Hz, a scale factor of 191 mV/g within a range of ± 2 g, and a bias instability of 38 μg (Allan variance). The noise sources of the proposed system are thoroughly investigated, which shows that low-frequency 1/f noise is the dominant noise source. We propose to use a high-frequency modulation technique to suppress the 1/f noise effectively. Measurement results show that the 1/f noise is suppressed about 8.6-fold at 1 Hz and the proposed system resolution can be improved to 2.2 μg/√Hz theoretically with this high-frequency modulation technique.

Design and calibration of high-frequency magnetic probes for the SUNIST spherical tokamak

2014 ◽  
Vol 85 (11) ◽  
pp. 11E802 ◽  
Author(s):  
Yangqing Liu ◽  
Yi Tan ◽  
Ou Pan ◽  
Rui Ke ◽  
Wenhao Wang ◽  
...  
Keyword(s):  
High Frequency ◽  
Spherical Tokamak ◽  
Magnetic Probes
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