### Abstract

The method is based on two-axis generation of a quasi-static rotating magnetic field and three-axis sensing. Two mutually orthogonal coils fed with phase-quadrature currents comprise the excitation source, which is equal to a mechanically rotating magnetic dipole. The resulting excitation field rotates elliptically at any position in the near-field region. The ac part of the squared field magnitude is a sinusoidal wave at twice the excitation frequency. The following set of parameters uniquely characterize the excitation at the sensor's position: the phase of the squared field waveform, relative to the excitation currents, the minimum field value, the ratio of the field extremes, and the orientation of the excitation field plane. Simple and explicit analytical expressions are given which relate the first three parameters to the azimuth, elevation, and distance from the source to the sensor, respectively. The orientation of the sensor axes, relative to the plane of the excitation, can easily be determined by comparing the phase anal amplitude of the measured signals against the phase anal amplitude of the excitation field at the sensor's position. Apart from simplicity, the proposed method increases the speed of tracking; a single period of excitation is in principle sufficient to obtain all of the information needed to determine both the sensor's position and orientation. A continuous sinusoidal excitation mode allows an efficient phase-locking anal accurate detection of the sensor output. It also improves the electromagnetic compatibility of the method.

Original language | English |
---|---|

Pages (from-to) | 1938-1940 |

Number of pages | 3 |

Journal | IEEE Transactions on Magnetics |

Volume | 37 |

Issue number | 4 I |

DOIs | |

Publication status | Published - Jul 1 2001 |

Event | 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001 |

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### All Science Journal Classification (ASJC) codes

- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)

### Cite this

*IEEE Transactions on Magnetics*,

*37*(4 I), 1938-1940. https://doi.org/10.1109/20.951014

**A new method for magnetic position and orientation tracking.** / Paperno, Eugene; Sasada, Ichiro; Leonovich, Eduard.

Research output: Contribution to journal › Conference article

*IEEE Transactions on Magnetics*, vol. 37, no. 4 I, pp. 1938-1940. https://doi.org/10.1109/20.951014

}

TY - JOUR

T1 - A new method for magnetic position and orientation tracking

AU - Paperno, Eugene

AU - Sasada, Ichiro

AU - Leonovich, Eduard

PY - 2001/7/1

Y1 - 2001/7/1

N2 - The method is based on two-axis generation of a quasi-static rotating magnetic field and three-axis sensing. Two mutually orthogonal coils fed with phase-quadrature currents comprise the excitation source, which is equal to a mechanically rotating magnetic dipole. The resulting excitation field rotates elliptically at any position in the near-field region. The ac part of the squared field magnitude is a sinusoidal wave at twice the excitation frequency. The following set of parameters uniquely characterize the excitation at the sensor's position: the phase of the squared field waveform, relative to the excitation currents, the minimum field value, the ratio of the field extremes, and the orientation of the excitation field plane. Simple and explicit analytical expressions are given which relate the first three parameters to the azimuth, elevation, and distance from the source to the sensor, respectively. The orientation of the sensor axes, relative to the plane of the excitation, can easily be determined by comparing the phase anal amplitude of the measured signals against the phase anal amplitude of the excitation field at the sensor's position. Apart from simplicity, the proposed method increases the speed of tracking; a single period of excitation is in principle sufficient to obtain all of the information needed to determine both the sensor's position and orientation. A continuous sinusoidal excitation mode allows an efficient phase-locking anal accurate detection of the sensor output. It also improves the electromagnetic compatibility of the method.

AB - The method is based on two-axis generation of a quasi-static rotating magnetic field and three-axis sensing. Two mutually orthogonal coils fed with phase-quadrature currents comprise the excitation source, which is equal to a mechanically rotating magnetic dipole. The resulting excitation field rotates elliptically at any position in the near-field region. The ac part of the squared field magnitude is a sinusoidal wave at twice the excitation frequency. The following set of parameters uniquely characterize the excitation at the sensor's position: the phase of the squared field waveform, relative to the excitation currents, the minimum field value, the ratio of the field extremes, and the orientation of the excitation field plane. Simple and explicit analytical expressions are given which relate the first three parameters to the azimuth, elevation, and distance from the source to the sensor, respectively. The orientation of the sensor axes, relative to the plane of the excitation, can easily be determined by comparing the phase anal amplitude of the measured signals against the phase anal amplitude of the excitation field at the sensor's position. Apart from simplicity, the proposed method increases the speed of tracking; a single period of excitation is in principle sufficient to obtain all of the information needed to determine both the sensor's position and orientation. A continuous sinusoidal excitation mode allows an efficient phase-locking anal accurate detection of the sensor output. It also improves the electromagnetic compatibility of the method.

UR - http://www.scopus.com/inward/record.url?scp=0035386590&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035386590&partnerID=8YFLogxK

U2 - 10.1109/20.951014

DO - 10.1109/20.951014

M3 - Conference article

AN - SCOPUS:0035386590

VL - 37

SP - 1938

EP - 1940

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 4 I

ER -