Reference magnetic actuator for self-calibration of a very small Hall sensor array

Demierre, Michel; Pesenti, Sergio; Frounchi, Javad; Besse, P.‐A.; Popović, R.S.

doi:10.1016/s0924-4247(01)00857-3

Cited by 28 publications

(4 citation statements)

References 6 publications

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“…The second attempt was to use the mechanically fixed perpendicularity errors of the 3D sensor and the 3D coil system [12]. Demierre et al presented the reference magnetic actuator for self-calibration of a very small Hall sensor array [13]. Four coils, connected in series, generate the calibration magnetic field on each sensor [13].…”

Section: Introductionmentioning

confidence: 99%

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Calibration of a fluxgate magnetometer array and its application in magnetic object localization

Pang

Luo

Zhang

et al. 2013

Meas. Sci. Technol.

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The magnetometer array is effective for magnetic object detection and localization. Calibration is important to improve the accuracy of the magnetometer array. A magnetic sensor array built with four three-axis DM-050 fluxgate magnetometers is designed, which is connected by a cross aluminum frame. In order to improve the accuracy of the magnetometer array, a calibration process is presented. The calibration process includes magnetometer calibration, coordinate transformation and misalignment calibration. The calibration system consists of a magnetic sensor array, a GSM-19T proton magnetometer, a two-dimensional nonmagnetic rotation platform, a 12 V-dc portable power device and two portable computers. After magnetometer calibration, the RMS error has been decreased from an original value of 125.559 nT to a final value of 1.711 nT (a factor of 74). After alignment, the RMS error of misalignment has been decreased from 1322.3 to 6.0 nT (a factor of 220). Then, the calibrated array deployed on the nonmagnetic rotation platform is used for ferromagnetic object localization. Experimental results show that the estimated errors of X, Y and Z axes are −0.049 m, 0.008 m and 0.025 m, respectively. Thus, the magnetometer array is effective for magnetic object detection and localization in three dimensions.

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Section: Introductionmentioning

confidence: 99%

“…Demierre et al presented the reference magnetic actuator for self-calibration of a very small Hall sensor array [13]. Four coils, connected in series, generate the calibration magnetic field on each sensor [13]. Liu et al presented a high-spatial resolution Hall sensor array for edge plasma magnetic field measurements.…”

Section: Introductionmentioning

confidence: 99%

Calibration of a fluxgate magnetometer array and its application in magnetic object localization

Pang

Luo

Zhang

et al. 2013

Meas. Sci. Technol.

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“…This new degree of freedom offered by on-chip circuitry can be used to counterbalance the poor characteristics of the silicon Hall device thru the use of specific biasing circuits [11], smart offset reduction techniques [12][13][14], This paper has been presented at "3 e colloque interdisciplinaire en instrumentation (C2I 2004)",École Normale Supérieure de Cachan, 29-30 janvier 2004. a e-mail: jean-baptiste.kammerer@iness.c-strasbourg.fr b e-mail: philippe.poure@lien.uhp-nancy.fr temperature compensation [15], self-calibration [16], and so on. The design of low cost integrated smart magnetometers is thus possible.…”

Section: Introductionmentioning

confidence: 99%

Hall effect sensors integrated in standard technology and optimized with on-chip circuitry

Kammerer

Hébrard

Frick

et al. 2006

Eur. Phys. J. Appl. Phys.

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While silicon is not the best semi-conductor material to design Hall effect sensors, it is widely used because Hall devices are fully compatible with standard processes such as CMOS or Bi-CMOS. Hall effect sensors can thus take advantage of on-chip circuitry to counterbalance the poor intrinsic metrological characteristics of silicon Hall devices, and low cost integrated smart magnetometers can be designed using standard technologies. Conventional Hall plate as well as the spinning-current method, which is the present state of the art technique to improve performances of integrated Hall devices, are reviewed in this paper. Then a new multi-strips Hall device and its specific biasing circuit are introduced. This new device allows to multiply by n the absolute sensitivity of the Hall sensor where n is the number of strips, but it suffers from offset. To overcome this drawback, a Hall sensors network which also allows to increase the sensitivity while reducing the offset is proposed. Finally a comparison between the Hall sensors network and the spinning-current is done, showing that both techniques are complementary and should be combined to design high resolution Hall sensor systems.

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“…A planar coil and Hall device combination without a magnetic core has been reported in the literature and have been used in an offset compensation scheme, yet with thin film technology [3]. A combination of four planar coils/Hall device assembly has also been reported with an improved current-magnetic field transfer ratio [4]. Different magnetic core configurations were also reported mainly utilized as field concentrators [5,6].…”

Section: Introductionmentioning

confidence: 99%

A study on a silicon Hall effect device with an integrated electroplated planar coil for magnetic sensing applications

Gamage¹,

Henderson²

2006

J. Micromech. Microeng.

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Hall effect devices have experienced extensive use, particularly for current sensing and power metering applications. Silicon Hall effect devices give low sensitivity compared to other materials such as InSb, owing to its relatively low electron and Hall mobilities. However, in identifying a relatively inexpensive solution in a planar format compatible with established processing techniques, silicon is ideal. In this work, the performance of an inexpensive silicon Hall effect device with an integrated planar coil is discussed for use in various applications such as power monitoring. The rectangular conventional Hall device was fabricated on n-type epitaxial silicon while the integrated planar coil was fabricated using electroplated copper. The choice of electroplated copper over a thin film evaporated metal was to enhance the current handling capability of the planar coil, thereby increasing the magnetic field generated. However, a limit to current exists as higher current levels heat the substrate, resulting in a drift in the Hall voltage. In an effort to confine the magnetic field, an electrolytically deposited Ni/Fe core was introduced to the planar coil. Measurements show that the magnetic core configuration improves the sensitivity of the assembly by a factor of 1.6. Depending upon theconditions, such as frequency and current bias, unamplified sensitivities from 8.6 to 10 µV mA−1 were observed.

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Reference magnetic actuator for self-calibration of a very small Hall sensor array

Cited by 28 publications

References 6 publications

Calibration of a fluxgate magnetometer array and its application in magnetic object localization

Calibration of a fluxgate magnetometer array and its application in magnetic object localization

Hall effect sensors integrated in standard technology and optimized with on-chip circuitry

A study on a silicon Hall effect device with an integrated electroplated planar coil for magnetic sensing applications

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