Suppression of low-frequency interferences in the induction sensor of magnetic field

Sklyar, R.

doi:10.1016/j.measurement.2006.01.005

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…When improvement of the low-frequency characteristic due to the feedback is not sufficient, additional suppression of low-frequency noise is possible by introduction of RC-filters, as is proposed in [43].…”

Section: Frequency Response Of Search Coil Sensorsmentioning

confidence: 99%

Induction coil sensors—a review

Tumański¹

2007

Meas. Sci. Technol.

502

271

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This review describes induction coil sensors, which are also known as search coils, pickup coils or magnetic loop sensors. The design methods for coils with air and ferromagnetic cores are compared and summarized. The frequency properties of coil sensors are analysed and various methods for output signal processing are presented. Special kinds of induction sensors, such as Rogowski coil, gradiometer sensors, vibrating coil sensors, tangential field sensors and needle probes are described. The applications of coil sensors as magnetic antennae are also presented.

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Section: Frequency Response Of Search Coil Sensorsmentioning

confidence: 99%

Induction coil sensors—a review

Tumański¹

2007

Meas. Sci. Technol.

502

271

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“…Where l is the length of core, d is the effective diameter of the core, r µ is the relative permeability of the core. The relationship between the effective permeability and inductance given without correction factor [4] is − is correction factor. w l is the length of coil.…”

Section: Simulation and Measurement Of The Core Permeabilitymentioning

confidence: 99%

Research of Core Characteristics of Search Coil Magnetometer

Zhang

Lin

2012

AMR

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In this paper, the theory of apparent permeability and effective permeability of the core is described. The apparent permeability with coil in different positions of the core is investigated and simulated by HFSS. The best location of the coil is determined according to the curves of the apparent permeability. The relationship between the effective permeability and aspect ratio of the core is investigated and compared with the theoretical derivation, verifying the accuracy of theoretical analysis. Specification of core in shape is solved. Core losses are further discussed. Quantitative analysis of core losses is obtained.

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A high-sensitive static vector magnetometer based on two vibrating coils

Pan

Wang

Feng

2011

Review of Scientific Instruments

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A static vector magnetometer based on two-dimensional (2D) vibrating coils actuated by a piezoelectric cantilever is presented. Two individual sensing coils are orthogonally fastened at the tip of cantilever and piezoelectric sheets are used to excite the cantilever bending. Due to off-axis coupler on the tip, the cantilever generates bending and twisting vibrations simultaneously on their corresponding resonant frequencies, realizing the 2D rotating vibrations of the coils. According to Faraday-Lenz Law, output voltages are induced from the coils. They are amplified by a pre-amplifier circuit, decoupled by a phase-sensitive detector, and finally used to calculate the vector of magnetic field at the coil location. The coil head of a prototype magnetometer possesses a dc sensitivity of around 10 μV/Gs with a good linearity in the measuring range from 0 to 16 μT. The corresponding noise level is about 13.1 nT in the bandwidth from 0.01 Hz to 1 Hz.

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Suppression of low-frequency interferences in the induction sensor of magnetic field

Cited by 5 publications

References 14 publications

Induction coil sensors—a review

Induction coil sensors—a review

Research of Core Characteristics of Search Coil Magnetometer

A high-sensitive static vector magnetometer based on two vibrating coils

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