A Compact Nonsymmetric Wideband Dipole Antenna for Borehole Radar Application

Tong, Jisheng; Guo, Jiyu; Huo, Jianjian; Jiao, Jiao; Guo, Cheng; Zhang, Heng; Liu, Yuxian; Liu, Shuang; Zhao, Qing

doi:10.1109/tap.2020.3048512

Cited by 9 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By inversion of the received data, it is possible to characterize the reservoir structure and the resistivity distribution of water, oil, and gas in two or even three dimensions across the wells and then to describe and directly measure the conductive properties of the formation rocks between the wells with high resolution and accuracy. [7][8][9][10][11] Compared with single-well electromagnetic detection, the frequency-domain electromagnetic detection method exhibits a notably enhanced lateral detection capacity, thus rendering it a technique of immense promise with broader prospects for application and heightened research and practical significance. [12][13][14][15] This detection method extends the detection horizon of the instrument from "around the wells" to "between the cross-wells," thus improving the accuracy of reservoir description.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A portable frequency‐domain electromagnetic detection system

Peng,

Zhao,

Zhang

et al. 2024

Circuit Theory & Apps

Self Cite

View full text Add to dashboard Cite

SummaryFrequency‐domain detection stands as a critical method in remote geophysical exploration; however, its practical application is constrained by the considerable size of the requisite instrumentation. In this paper, we present a compact frequency domain electromagnetic detection system. The integration of intelligent power devices and a novel hardware architecture substantially diminishes the system's dimensions, thereby enhancing its portability. Furthermore, the system design incorporates sinusoidal pulse width modulation and digital phase‐locked amplification to ensure the efficacy of the proposed system. Both the transmitter and receiver system are constrained to dimensions smaller than 1.5 m. Subsequent experimental validation attests to the exemplary hardware performance of the proposed system, with the transmitting voltage of the transmitter circuit attaining 500 V, and the receiver circuit exhibiting a sensitivity as low as 10−8 V. Significantly, this design paradigm not only facilitates the integration of transmitter and receiver systems for frequency‐domain electromagnetic detection but also introduces novel prospects for the application of frequency‐domain electromagnetic detection methods across diverse fields.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A portable frequency‐domain electromagnetic detection system

Peng,

Zhao,

Zhang

et al. 2024

Circuit Theory & Apps

Self Cite

View full text Add to dashboard Cite

show abstract

“…The receiving coil receives the secondary magnetic field, the received data is analyzed and processed, and the orebody and related physical parameters are obtained according to the data [ 8 ]. The working principle of the HTEM detection system is shown in Figure 1 a [ 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

A Nine-Level Inverter with Adjustable Turn-Off Time for Helicopter Transient Electromagnetic Detection

Peng

Guo

Chang

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

The current inverter is the core component of the helicopter transient electromagnetic (HTEM) detection system. It should meet the concerns of low loss, high power, and fast turn-OFF time. This article proposes a new circuit topology based on nine-level inverter technology to overcome the drawbacks of typical PWM (pulse width modulation) inverters, such as switching losses and harmonics. This circuit topology overcomes the shortcomings of the traditional single constant voltage clamp circuit in which the turn-OFF time is not adjustable. Using an inverter with the proposed topology is able to avoid the complex PWM control method and switching loss. In this way, the current rising edge and falling edge of this inverter are also improved effectively. The proposed inverter has adjustable turn-ON-time and turn-OFF time, which is significantly different from the conventional single-clamp inverter. Through subsequent experiments, the inverter proved to have the capability of generating trapezoidal current waveforms. Moreover, by modifying the FPGA (Field Programmable Gate Array) control program, three different turn-OFF times are achieved. The nine-level inverter has a peak current of 1.5 A with an adjustable turn-OFF time from 129 μs to 162 μs. Moreover, the switching frequency of the inverter is reduced from 10 kHz to below 100 Hz. The experimental results further demonstrate that it achieves lower switching losses and more flexible transmission. Our work in this article provides an efficient way to improve the performance of HTEM detection systems.

show abstract