Exploring on the Sensitivity Changes of the LC Resonance Magnetic Sensors Affected by Superposed Ringing Signals

Lin, Tingting; Zhou, Kun; Yu, Sijia; Wang, Pengfei; Wan, Ling; Zhao, Jiyong

doi:10.3390/s18051335

Cited by 4 publications

(3 citation statements)

References 22 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3a). The rise and fall time demonstrate the usual challenge in turning AC (RF) magnetic fields on and off quickly [4][5][6][7][8][9][10][11]. It takes many periods for the system to ring up when the drive voltage is applied and many periods to ring down when it is removed.…”

Section: Ac Magnetic Fields Underdamped Circuitmentioning

confidence: 99%

“…The algorithms discussed here allow one to have both the benefits of high-Q in terms of large resonant enhancements in the generated RF magnetic field and rapid on/off settling, typically in less than an RF period. We predict that such techniques will prove pivotal for NMR applications such as high resolution cryogenic systems [18], fast-relaxation solid samples [19], surface NMR systems for analyzing deep underground materials [4], low-field NMR [6], [10]- [11], and magnetic resonance imaging (MRI) systems, both stationary [5] and portable [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modal Engineering of Inductive Circuits to Achieve Rapid Settling Times

Javor¹,

Barrett²,

Imboden³

et al. 2021

Preprint

View full text Add to dashboard Cite

Inductive circuits and devices are a ubiquitous and important design element in many applications such as magnetic drives, galvanometers, magnetic scanners, applying DC magnetic fields to systems, RF coils in NMR systems and vast array of other applications. They are widely used to generate both DC and AC magnetic fields. Many of these applications require a rapid step and settling time, turning the DC or AC magnetic field on and off quickly. The inductive response normally makes this a challenging thing to do. In this article we discuss open loop control algorithms for achieving rapid step and settling times in four general categories of applications: DC and AC systems where the system is either under or over damped. Each of these four categories requires a different algorithm which we describe here. We show the operation of these drive methods using Simulink and Simscape modeling tools, analytical solutions to the underlying differential equations and in experimental results using an inductive magnetic coil and a Hall sensor. Finally, we demonstrate application of these techniques to significantly reduce ringing in a standard NMR circuit. We intend this article to be practical with useful, easy to apply algorithms and helpful tuning tricks.

show abstract

Section: Ac Magnetic Fields Underdamped Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modal Engineering of Inductive Circuits to Achieve Rapid Settling Times

Javor¹,

Barrett²,

Imboden³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…In addition to weak geomagnetic measurements, the aforementioned coil sensors are also applied to other applications, such as high magnetic field measurement, called nuclear magnetic resonance (NMR) [17], magnetic resonance sounding (MRS) [18], etc [19]. An equivalent condition arises for the generation of a transverse homogenous magnetic field produced within a cylindrical volume.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study on the weak magnetic sensor character of different geometries for proton precession magnetometer

et al. 2018

View full text Add to dashboard Cite

The measurement precision or uncertainty of proton precession magnetometer (PPM) depends on the signal-to-noise ratio (SNR) of the free induction decay (FID) signal induced in the sensing coil. A diversity of weak magnetic measurement applications has benefited from various coils through a more comprehensive and reliable design. Likewise, numerous optimized sensors for PPM have been proposed and published in literature. However, due to lack of commonly accepted assessment measures and benchmark resources, it is hard to identify the performance of the proposed sensors and corresponding implementations. This paper investigates and categorizes sensing coils for PPM which are well used and accepted. Three state-of-the-art geometries of the coil including solenoid, toroid, and cylindric, are considered to evaluate the significance of these designs in terms of sensing signal strength analyses within their respective applications. Furthermore, the electromotive force (EMF) of FID signal is calculated as a function of sensing coils' geometrical parameters, and numerous critical factors such as the polarizing current, the orientation of the coil axis with respect to the direction of the external magnetic field, etc., are considered. Although the results of these calculations are limited by prerequisites, e.g. the sensor should be in a uniform magnetic field, it is a critical step for future sensor research. This paper aims to advance weak magnetic sensor development by establishing a comparative study to allow the optimum geometrical shapes to be chosen for different applications.

show abstract