Magnetic field based micro-vibration measurement device and measuring method thereof

US10697826B2 · kind B2 · utility

Assignee

• Institute of Geology and Geophysics, Chinese Academy of Sciences · CN

Inventors

• Shuquan Sun · Beijing, CN
• Aimin Du · Beijing, CN
• Lin Zhao · Sunnyvale, US
• Heng Tang · Beijing, CN
• Qiong Li · Tappan, US
• Xiao Feng · Nanhu, CN
• Cuihong Li · Beijing, CN
• Qingyun Di · Beijing, CN

Key dates

• Filing date: Mar 2, 2018
• Grant date: Jun 30, 2020
• Expiry date: Nov 17, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/04
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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.