Inductive magnetic sensor and electromagnetic prospecting equipment

US11914092B2 · kind B2 · utility

Assignee

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

Inventors

• Qingyun Di · Beijing, CN
• Qihui Zhen · Beijing, CN
• Yuliang Wang · Nanhu, CN
• Zhiyao Liu · Longbeilingcun, CN
• Quanmin Yang · Beijing, CN

Key dates

• Filing date: Dec 9, 2020
• Grant date: Feb 27, 2024
• Expiry date: Aug 18, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03F2203/45621
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present disclosure provides an inductive magnetic sensor, which includes a signal pre-amplifying measurement circuit, a feedback loop, a magnetic core and coil group, a low-noise autozero processing circuit, and an output protection module. The magnetic core and coil group is electrically connected between the signal pre-amplifying measurement circuit and the feedback loop, the signal pre-amplifying measurement circuit comprises the low-noise autozero processing circuit, and the feedback loop and the low-noise autozero processing circuit are electrically connected to the output protection module respectively. By introducing the resonant notch filter, it may extend the passband to the low frequency, and extend the low-frequency characteristic of the magnetic sensor, to obtain a better low-frequency magnetic sensor. The present disclosure further provides an electromagnetic prospecting equipment.