An adaptive gain adjusting device, method, equipment and product for a magnetotelluric acquisition instrument
By combining a notch filter, multi-stage gain amplification, pre-detection, and closed-loop feedback modules into an adaptive adjustment device, the shortcomings of traditional radio frequency magnetotelluric data acquisition instruments in gain adjustment in complex field environments are solved, achieving signal stability and efficient acquisition.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INST OF GEOPHYSICAL & GEOCHEMICAL EXPLORATION CHINESE ACAD OF GEOLOGICAL SCI
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional radio frequency magnetotelluric data acquisition instruments rely on fixed gain circuits or manual adjustment structures for gain adjustment, which cannot adapt to complex electromagnetic environments in the field, resulting in reduced data acquisition accuracy and low exploration efficiency.
By employing a combination of a notch filter module, a multi-stage gain amplification module, a pre-detection module, a digitization module, a spectrum analysis and decision module, and a closed-loop feedback module, real-time signal monitoring and adaptive gain adjustment are achieved, electromagnetic interference is suppressed, and the amplifier circuit is protected from saturation.
It improves the stability and accuracy of data acquisition, reduces human intervention, enhances the automation level and efficiency of field exploration, and adapts to the rapidly changing electromagnetic environment in the field.
Smart Images
Figure CN122410641A_ABST