Semi-aviation transient electromagnetic acquisition device and method for calibrating data drift in real time

By developing a device and method for real-time calibration of data drift in semi-airborne transient electromagnetic detection, the problem of data instability caused by zero-point drift was solved, and the synchronization of data acquisition and drift compensation was achieved, thereby improving the accuracy and adaptability of the detection data.

CN121049986APending Publication Date: 2025-12-02SHANDONG UNIV
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Patent Information

Application Number
CN202511259789.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-04
Publication Date
2025-12-02

AI Technical Summary

Technical Problem

In existing semi-airborne transient electromagnetic detection technology, the zero-point drift problem cannot be solved in real time, resulting in poor data stability, especially in complex environments where it is easy to misjudge the geological structure or the location of the ore body.

Method used

A semi-airborne transient electromagnetic data acquisition device with real-time calibration of data drift is used to migrate drift calibration from traditional software post-processing to the hardware acquisition stage. By utilizing the flight control unit, electromagnetic data acquisition unit, and drift calibration unit carried by the UAV, data acquisition and drift compensation are synchronized, and calibration is performed through static reference mode and dynamic reference mode.

Benefits of technology

It achieves drift elimination and compensation during the data acquisition stage, ensuring data stability and improving the accuracy and reliability of detection data. It is suitable for various electromagnetic detection equipment and complex geological environments.

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Abstract

The invention provides a semi-aviation transient electromagnetic acquisition device and method for calibrating data drift in real time, and relates to the technical field of data calibration, and the device comprises an electromagnetic data acquisition unit which receives a secondary induction signal generated by a ground transmitting end through a transient electromagnetic hollow induction coil disposed in a coil storage cabin of an unmanned aerial vehicle, and transmits the secondary induction signal to an unmanned aerial vehicle; self-adaptive gain control is carried out according to the signal intensity to obtain real-time electromagnetic data; the flight control unit monitors the swing amplitude and frequency of the coil in real time according to the inclination angle and acceleration data fed back by the sensor in the coil storage cabin, and carries out flight attitude adjustment and control; the drift calibration unit adopts a static reference mode for calibration at the beginning stage of flight; and switching to a dynamic reference mode in the flight process, and carrying out self-adaptive calibration on the real-time data stream based on a sliding window. According to the invention, drift calibration of traditional software post-processing is migrated to a hardware acquisition stage, so that synchronous completion of data acquisition and drift compensation is realized.
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