Design of Induction Magnetometer Receiving Sensor for Through-the-Earth Communications

Yan, Bin; Zhu, Wenhao; Liu, Leisong; Li, Kai; Fang, Guangyou

doi:10.1109/jsen.2014.2359228

Cited by 10 publications

(8 citation statements)

References 21 publications

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“…Numerical methods have been described for optimising air-core magnetometer designs 5 , 10 – 15 . These have the benefit of requiring fewer assumptions than analytic methods.…”

Section: Introductionmentioning

confidence: 99%

Towards ultimate low frequency air-core magnetometer sensitivity

Pellicer-Guridi

Vogel

Reutens

et al. 2017

Sci Rep

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Air-core magnetometers are amongst the most commonly used magnetic field detectors in biomedical instruments. They offer excellent sensitivity, low fabrication complexity and a robust, cost-effective solution. However, air-core magnetometers must be tailored to the specific application to achieve high sensitivity, which can be decisive in the accuracy of the diagnoses and the time required for the examination. Existing methods proposed for the design of air-core magnetometers are based on simplified models and simulations using a reduced number of variables, potentially leading to sensitivity that is suboptimal. To circumvent this we chose a method with fewer assumptions and a larger number of decision variables which employed a genetic algorithm, a global optimisation method. Experimental validation shows that the model is appropriate for the design of highly sensitive air-core magnetometers. Moreover, our results support the suitability of a genetic algorithm for optimization in this context. The new method described herein will be made publicly available via our website to facilitate the development of less costly biomedical instruments using air-core magnetometers with unprecedented sensitivity.

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“…Numerical methods have been described for optimising air-core magnetometer designs 5 , 10 – 15 . These have the benefit of requiring fewer assumptions than analytic methods.…”

Section: Introductionmentioning

confidence: 99%

Towards ultimate low frequency air-core magnetometer sensitivity

Pellicer-Guridi

Vogel

Reutens

et al. 2017

Sci Rep

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show abstract

“…In this study, firstly, the carrier frequency was set to 85 Hz for TEC using SLF, and the resonant frequency of the primary receiving SCM was tuned to this carrier frequency [9] by C p . Thus, on one hand, the primary-receiving SCM can be designed for the desired narrow bandwidth.…”

Section: Solution To the Scm Optimization Problemmentioning

confidence: 99%

“…In this study, contour maps [9,13] are adopted, and the results are shown in Figs. 5 and 6 for the primary receiving and reference SCM, respectively.…”

Section: Solution To the Scm Optimization Problemmentioning

confidence: 99%

“…Therefore, it is difficult, inconvenient, and costly to place noise-reference sensors remotely when communicating. Further, sensors such as loop antennas [1,6], air coils, and electrodes [7,8] are unsuitable for placement in underground or underwater terrains, especially during emergencies [9]. This is because air coils or loop antennas need to be large (such as these loop diameters of 3.8, 12.5, 26, and 90 m [1]) to obtain high sensitivity required for receiving weak magneticfield signals, and the receiving terminals of the electrodes need to be separated over a large distance.…”

Section: Introductionmentioning

confidence: 99%

“…However, TEC requires very narrow bandwidth, i.e., a few hundred Hertz in VLF and a few Hertz in super-low frequency (SLF, 30 Hz-300 Hz). Thus, one approach to design the SCM more suitable for TEC, especially for SLF and lower frequencies, is paralleling the matching capacitor and tuning the resonant frequency to the TEC carrier frequency [9]. Besides, the coils need to be small in size so as to meet the demands of easy placement and portability [14].…”

Section: Introductionmentioning

confidence: 99%

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Design of the Magnetic Field Sensing System for Downlink Signal Reception and Interference Cancelling for Through-the-Earth Communication

Zhao¹,

Jiang²,

Zhang³

et al. 2016

Journal of Magnetics

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A magnetic field sensing system with a single primary sensor and multiple reference sensors deployed locally and orthogonally, was proposed for downlink signal reception and interference cancelling for Through-theEarth Communication (TEC). This paper mathematically analyzes a design optimization process for a search coil magnetometer (SCM), and applies that process to minimize the bandwidth of the primary SCM for TEC signal reception and the volume of reference SCMs for multiple distributions. The primary SCM achieves a 3-dB bandwidth of 7 Hz, a sensitivity threshold of 120 fT/√Hz, and a volume of 2.32 × 10 −4 m 3 . The entire sensing system volume is as small as 10 −2 m 3. Experiments with interference from industrial frequency harmonics demonstrated an average of 36 dB and 18 dB improvements in signal-to-interference ratio and signal-tointerference plus noise ratio, respectively, using multichannel recursive-least-squares algorithm. Thus, the proposed sensing system can reduce the interference effectively and allows reliable downlink signal reception.

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Radio Frequency Precession Modulation-Based Magnetic Field Sensors

Luong

Fereidoony³

et al. 2022

IEEE Access

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High sensitivity is often the foremost characteristic for magnetic field sensors; however, the most sensitive systems tend to be attributed with being any combination of large in size, high in power consumption, complex in design, or exorbitant in cost. This fact not only limits accessibility to the technology afforded by high sensitivity sensing, but it also restricts the extent to which potential applications of magnetic field sensing may be realized. Herein we propose a concept for sensor operation that can achieve sensitivities competitive with those of modern magnetic field sensors while simultaneously maintaining small size, low power consumption, simplicity in design, and low cost. This is accomplished through employment of the nonlinear precession dynamics of electron spins to attain parametric amplification of a magnetic field. A preliminary experimental implementation of the proposed concept establishes its feasibility and is already able to demonstrate benefits over existing approaches to sensing. The implementation exhibits a sensitivity of 23.2 pT/Hz 1/2 with a volume of 0.0564 mm 3 and a power consumption of -40.96 dBm.

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Design of Induction Magnetometer Receiving Sensor for Through-the-Earth Communications

Cited by 10 publications

References 21 publications

Towards ultimate low frequency air-core magnetometer sensitivity

Towards ultimate low frequency air-core magnetometer sensitivity

Design of the Magnetic Field Sensing System for Downlink Signal Reception and Interference Cancelling for Through-the-Earth Communication

Radio Frequency Precession Modulation-Based Magnetic Field Sensors

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