Design of Shallow Surface Electromagnetic Detection Transmitting Scheme Based on Three-Frequency Resonance

Liu, Changsheng; Zhang, Chunfeng; Zhou, Haigen; Liu, Naijia; Li, Gang

doi:10.1109/tim.2020.3023980

Cited by 15 publications

(5 citation statements)

References 20 publications

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“…To further expand the detection range and improve the detection efficiency, the traditional emission circuit needs to be improved. In this paper, a combined wave emission circuit based on the resistor-inductor-capacitor series resonance is proposed [25]. Through the combination emission of half-sine wave and triangular wave, high emission magnetic moment and highfrequency components are ensured.…”

Section: Principle Of Atemmentioning

confidence: 99%

Combined wave emission system based on dual resonance method for airborne transient electromagnetic detection

Zhang

Pang

Liu

et al. 2023

Meas. Sci. Technol.

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To improve the detection efficiency of airborne transient electromagnetic method (ATEM) and reduce the times of flight experiment, a dual resonance-based combined wave emission circuit is proposed in this paper, which realizes the combined emission of half-sine wave and triangular wave through the selection of different resonant branches. Based on the operating principle of the proposed emission circuit, the model of second-order RLC equivalent circuit is established. Then, the generation process of the combined wave is analyzed, and the segmentation control method is proposed. Finally, the feasibility and effectiveness of the proposed combined wave emission system are verified by simulation model building and prototype testing, and the results show that the emission current is of good quality and high stability. Compared with the traditional emission of single wave current, the combined wave current has the advantages of large magnetic moment of half-sine wave and rich high frequency components of triangular narrow pulse, which can effectively expand the detection range and improve the measurement efficiency of ATEM.

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Section: Principle Of Atemmentioning

confidence: 99%

Combined wave emission system based on dual resonance method for airborne transient electromagnetic detection

Zhang

Pang

Liu

et al. 2023

Meas. Sci. Technol.

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“…Frequency-domain electromagnetic method is a kind of geophysical electromagnetic exploration method, which has significant advantages in shallow surface exploration and has been widely used in the geological survey, metal exploration, archaeology, urban underground pipeline exploration and other fields [1][2][3]. Electromagnetic method is mainly divided into airborne electromagnetic method and ground electromagnetic method according to spatial location [4].…”

Section: Introductionmentioning

confidence: 99%

Design of Motion Attitude Measurement System and Correction Method in Semi‐Airborne Frequency Domain Electromagnetic Detection

Liu,

Su,

Zhang

et al. 2024

IEEJ Transactions Elec Engng

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In the semi‐airborne frequency domain electromagnetic detection, strong noise will be generated due to the attitude change of the receiving coil sensor. However, the existing attitude measurement system cannot be directly used in the semi‐airborne frequency domain electromagnetic system because of the requirement on the volume and accuracy of the instrument. In order to reduce the effect of attitude noise, this paper analyzes the cause and influence of attitude noise in the semi‐airborne frequency domain electromagnetic system, and presents the attitude noise correction method based on coefficient rotation matrix and Kalman algorithm. A high‐performance attitude sensor based on (Micro‐Electro‐Mechanical System (MEMS) technology is used to design an attitude measurement system for the semi‐airborne frequency domain electromagnetic system. The calculated result shows that the required accuracy of the roll angle and pitch angle of the attitude measurement system is less than 0.1°, whereas the required accuracy of the yaw angle is lower. In the field application, the apparent resistivity results show that the imaging profile corrected by attitude error is more consistent with local geological data than that without correction. Consequently, the attitude measurement system and correction method proposed in this paper can improve the detection accuracy of the semi‐airborne frequency domain electromagnetic system significantly. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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“…However, conventional narrow-band resonance is mainly targeted at a single frequency point, so it is not suitable for multi-frequency transmission waveforms. To realize multi-frequency transmission, Changsheng Liu et al proposed the method of combining the third-order 2 n pseudo-random waveform with three-frequency resonance [22]. On this basis, Shuxu Liu proposed a resonance design method with more frequencies [23].…”

Section: Introductionmentioning

confidence: 99%

Design of Broadband Resonant Transmission for Depth-Focused Waveform in GAFDEM Exploration

YU,

MENG,

SHEN

et al. 2024

IEICE Trans. Electron.

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The Ground-Air Frequency Domain Electromagnetic Method (GAFDEM) is a fast and effective semi-airborne electromagnetic exploration method for subsurface anomaly targets. Based on the depthfocused transmission waveform, this method can realize the highresolution detection of underground targets at specific depths. However, due to the high inductance and resistance parameters of the transmitting load in GAFDEM exploration, the transmission current of the depthfocused waveform decays rapidly in the middle and high-frequency bands, which restricts the detection signal intensity. To solve this problem, a broadband resonant circuit and its parameter design method are proposed. According to the typical transmission frequency range and load, the parameters are designed, and the circuit model is simulated and tested. The results show that the designed broadband resonant circuit can increase the transmission active power of the depth-focused waveform by more than 490%, reduce the reactive power by more than 37%, and increase the transmission current intensity of the target frequency by 2.64 times. Moreover, this circuit has good robustness. It can achieve a good resonance effect within the error range of ±10% of capacitor. This design provides an effective way for GAFDEM to enhance the intensity of high-frequency detection signals and improve the shallow exploration effect.

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Design of Shallow Surface Electromagnetic Detection Transmitting Scheme Based on Three-Frequency Resonance

Cited by 15 publications

References 20 publications

Combined wave emission system based on dual resonance method for airborne transient electromagnetic detection

Combined wave emission system based on dual resonance method for airborne transient electromagnetic detection

Design of Motion Attitude Measurement System and Correction Method in Semi‐Airborne Frequency Domain Electromagnetic Detection

Design of Broadband Resonant Transmission for Depth-Focused Waveform in GAFDEM Exploration

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