Precise magnetic sensors

Vopálenský, Michal; Ripka, Pavel; Platil, Antonin

doi:10.1016/s0924-4247(03)00129-8

Cited by 59 publications

(24 citation statements)

References 6 publications

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“…Linearity error of a Philips KMZ 51 AMR sensor, feedback compensated by using an internal coil. Hysteresis is also visible from the measurement cycle [18].…”

Section: B Magnetic Feedbackmentioning

confidence: 93%

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Advances in Magnetic Field Sensors

2010

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Abstract-The most important milestone in the field of magnetic sensors was when AMR sensors started to replace Hall sensors in many applications where the greater sensitivity of AMRs was an advantage. GMR and SDT sensors finally found applications. We also review the development of miniaturization of fluxgate sensors and refer briefly to SQUIDs, resonant sensors, GMIs, and magnetomechanical sensors.

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“…Linearity error of a Philips KMZ 51 AMR sensor, feedback compensated by using an internal coil. Hysteresis is also visible from the measurement cycle [18].…”

Section: B Magnetic Feedbackmentioning

confidence: 93%

“…With feedback compensation, the linearity error may be below 300 ppm of the full-scale, as shown in Fig. 3 [18].…”

Section: B Magnetic Feedbackmentioning

confidence: 99%

Advances in Magnetic Field Sensors

2010

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“…The limitation of this approach is the homogeneity of the compensation field, which is questionable for flat compensation coil used in case of integrated sensors. However practically achieved linearity of the feedback-compensated KMZ51 was 0.1%, which is sufficient for most applications [7].…”

Section: A Feedback Compensationmentioning

confidence: 95%

Crossfield Sensitivity in AMR Sensors

2009

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We discuss the origin of the crossfield sensitivity of AMR sensors, the way how this error may influence the performance of an AMR compass and methods for its correction. Finally, we confirm the simple formulas experimentally. Crossfield may cause compass error up to 2.6 deg., depending on the compass orientation. The most effective way to suppress the crossfield error is using magnetic feedback, however this is not always possible. We suggest a method of processing of the SET/RESET sensor outputs which is more efficient than the usual averaging.

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“…Magnetic biscuits can be used for functional tests of digestive tract, while microbeads are used as markers in biotechnology. New types of fluxgate microsensors are being developed for these applications (Vopalensky et al, 2003). Also Hall magnetic sensors have been employed to visualize a magnetically market diagnostic capsule in real time inside human body (Mahfuzul-Aziz, 2008).…”

Section: Applicationsmentioning

confidence: 99%