The future of magnetic sensors

Popović, R.S.; Flanagan, John A.; Besse, P.‐A.

doi:10.1016/0924-4247(96)01285-x

Cited by 147 publications

(85 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fluxgate magnetometers are currently one of the best choices for industrial and field applications, where precise unshielded measurements should be performed at relatively high, non-cryogenic temperatures [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Suppression of magnetic noise in the fundamental-mode orthogonal fluxgate

Paperno

2004

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

A new important advantage has been discovered for the fundamental-mode operation of the orthogonal fluxgate employing an amorphous wire. It has been found that a great enough dc bias practically completely suppresses the magnetic noise generated in the fluxgate core by the ac-bias field; the fluxgate resolution becomes limited only by the excess electric noise in the ac-bias current. As a result, the magnetometer resolution increases by a factor of 60 and reaches 10 pT/ √ Hz at frequencies above 2 Hz. The suppression of magnetic noise can be explained by excluding magnetization reversals in the fluxgate core. In the fundamental mode, the fluxgate core is kept saturated continuously due to the unipolar bias, and magnetization varies by coherent rotation. Practically no magnetic noise is generated in this case. In the second-harmonic mode, magnetization is reversed by the bipolar bias. This causes nucleating domains and generating intensive magnetic noise in the fluxgate core.

show abstract

Section: Introductionmentioning

confidence: 99%

Suppression of magnetic noise in the fundamental-mode orthogonal fluxgate

Paperno

2004

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

show abstract

“…Since at the receiver side only small signals are expected, it is preferable to increase the number of turns in the pickup coil, even at the cost of a decrease of the cross section of the wire. According to Faraday's law, the number N of turns in the coil is the relevant factor for the induced voltage U [10], but by increasing the number of turns in the coil or the cross section of the wire, it also increases its size which has a negative effect on the signal-to-noise ratio or on the stability of the sensor.…”

Section: Resultsmentioning

confidence: 99%

New Electromagnetic Force-Displacement Sensor

2016

View full text Add to dashboard Cite

show abstract

“…All-optical switches and attenuators enable routing of data without the need for optical to electrical conversion. Optical fiber based devices have also been widely used for optical amplitude modulator (Fang and Taylor 1994;Lee et al 1997;Matias et al 2001) and imaging (Boppart et al 1997;Nelson et al 1997;Sedlar et al 2000;Popovic et al 1996;Keplinger et al 2003). Variable fiber-optic-based devices have been developed with piezoelectric (Herding et al 2004), electrostatic (Hoffmann et al 1999;Cochran et al 2004), thermal (Nagaoka 1999;Bernstein et al 2004;Comtois et al 1997), and electromagnetic (Deeter 1995;Tearney et al 1996;Dhaubanjar 2006;Sendoh et al 2003) actuations.…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Actuator for Fiber-Optic Applications

Pandojirao-Sunkojirao

Rao

Phuyal

et al. 2009

International Journal of Optomechatronics

View full text Add to dashboard Cite

Optical fibers coated with various non-magnetized ferromagnetic materials and actuated by external magnetic fields were designed and characterized to demonstrate the feasibility for remote scanning. Cobalt, iron, nickel, and samarium-cobalt powders were used to enable the actuation. Silica optical fibers were coated with a mixture of 70% enamel paint and 30% various ferromagnetic materials. The static and dynamic measurements were preformed under the remote control of an electromagnet. Experiments with different ferromagnetic materials and different suspended fiber lengths of 3.2 cm, 4.2 cm, 5.2 cm, 6.2 cm, and 7.2 cm were performed to compare with theory. The static displacements, dynamic displacements and resonant frequencies of the actuation were measured.

show abstract

The future of magnetic sensors

Cited by 147 publications

References 31 publications

Suppression of magnetic noise in the fundamental-mode orthogonal fluxgate

Suppression of magnetic noise in the fundamental-mode orthogonal fluxgate

New Electromagnetic Force-Displacement Sensor

A Magnetic Actuator for Fiber-Optic Applications

Contact Info

Product

Resources

About