公开(公告)号：US10901048B2

公开(公告)日：2021-01-26

申请号：US15909591

申请日：2018-03-01

申请人： INSTITUTE OF GEOLOGY AND GEOPHYSICS CHINESE ACADEMY OF SCIENCES (IGGCAS)

发明人： Lin Zhao ,  Aimin Du ,  Shuquan Sun ,  Heng Tang ,  Qiong Li ,  Xiao Feng ,  Cuihong Li ,  Qingyun Di

IPC分类号： G01R33/028 ,  G01R23/10 ,  G01V3/40 ,  G01R33/06 ,  G01R33/00

摘要： An electronic magnetometer and a method for measuring a magnetic field are provided. A Gunn diode with magnetic shielding and a Gunn diode without magnetic shielding generate different induced high-frequency oscillating currents in various environments. The high-frequency oscillating current of the Gunn diode with magnetic shielding and the high-frequency oscillating current of the Gunn diode without magnetic shielding are processed by circuits and subsequently compared. The difference of frequencies in the two currents is proportional to the magnitude of magnetic field, and the magnitude of magnetic field is obtained.

公开(公告)号：US10697826B2

公开(公告)日：2020-06-30

申请号：US15910328

申请日：2018-03-02

申请人： INSTITUTE OF GEOLOGY AND GEOPHYSICS CHINESE ACADEMY OF SCIENCES (IGGCAS)

发明人： Shuquan Sun ,  Aimin Du ,  Lin Zhao ,  Heng Tang ,  Qiong Li ,  Xiao Feng ,  Cuihong Li ,  Qingyun Di

IPC分类号： G01H11/02 ,  G01R33/00 ,  G01R33/04 ,  G01D5/12 ,  G01R33/032

摘要： A magnetic field based micro-vibration measurement device and a measuring therefore are provided, which are applied in a micro-vibration measurement technical field. Fluxgate sensors and a control processing circuit are included. Each of the fluxgate sensors is disposed with an excitation coil and an induction coil that are mutually corresponding; the control processing circuit includes: an excitation signal generating module, a frequency-selective amplifying module, a phase-sensitive rectifying module, a smooth filtering module an ambient magnetic field acquisition module, and a vibration data statistics module. Excitation coils generate excitation magnetic field signals according to the excitation signal sent from the excitation signal generating module the induction coils are for generating induced current signals according to the receive excitation magnetic field signal and the ambient magnetic field signal. Induced current signals are calculated to obtain ambient magnetic field data after sequentially undergoing selective amplification, rectification and smooth filtering.