TY - JOUR
T1 - Compensation of crosstalk in three-axial induction magnetometers
AU - Paperno, Eugene
AU - Grosz, Asaf
AU - Amrusi, Shai
AU - Zadov, Boris
N1 - Funding Information:
Manuscript received November 15, 2010; revised February 15, 2011; accepted February 18, 2011. Date of publication April 7, 2011; date of current version September 14, 2011. This work was supported in part by Analog Devices, Inc., by National Instruments, Inc., and by the Ivanier Center for Robotics Research and Production Management. The Associate Editor coordinating the review process for this paper was Dr. Salvatore Baglio.
PY - 2011/10/1
Y1 - 2011/10/1
N2 - A method for the compensation of crosstalk in three-axial induction magnetometers is developed theoretically and verified experimentally. The compensation is based on deriving crosstalk-free magnetometer outputs from a system of equations describing the magnetometer total outputs as a function of the applied field, the parameters of the magnetometer coils, and the crosstalk factors for the applied and secondary magnetic fluxes. Processing the total outputs of an experimental magnetometer has demonstrated an effective reduction of the crosstalk: it has been reduced below 0.5% in the whole magnetometer bandwidth, including the frequencies near resonance, where the crosstalk is especially strong (20%). In comparison, the reduction of the crosstalk by applying magnetic feedback is much less effective: the crosstalk has been reduced down to 6% at resonance, remained unchanged at low and high frequencies, and even increased just below resonance. Moreover, magnetic feedback flattens the frequency response and significantly reduces the magnetometer selectivity, which can be advantageous in many applications. Employing magnetic feedback also increases the magnetometer complexity and its power consumption.
AB - A method for the compensation of crosstalk in three-axial induction magnetometers is developed theoretically and verified experimentally. The compensation is based on deriving crosstalk-free magnetometer outputs from a system of equations describing the magnetometer total outputs as a function of the applied field, the parameters of the magnetometer coils, and the crosstalk factors for the applied and secondary magnetic fluxes. Processing the total outputs of an experimental magnetometer has demonstrated an effective reduction of the crosstalk: it has been reduced below 0.5% in the whole magnetometer bandwidth, including the frequencies near resonance, where the crosstalk is especially strong (20%). In comparison, the reduction of the crosstalk by applying magnetic feedback is much less effective: the crosstalk has been reduced down to 6% at resonance, remained unchanged at low and high frequencies, and even increased just below resonance. Moreover, magnetic feedback flattens the frequency response and significantly reduces the magnetometer selectivity, which can be advantageous in many applications. Employing magnetic feedback also increases the magnetometer complexity and its power consumption.
KW - Compensation
KW - crosstalk
KW - magnetic feedback
KW - three-axial induction magnetometers
UR - http://www.scopus.com/inward/record.url?scp=80052831403&partnerID=8YFLogxK
U2 - 10.1109/TIM.2011.2124850
DO - 10.1109/TIM.2011.2124850
M3 - Article
AN - SCOPUS:80052831403
SN - 0018-9456
VL - 60
SP - 3416
EP - 3422
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
IS - 10
M1 - 5743011
ER -