Minmaxmedical

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Sandra Rousseau

Mickael Chave

Loic Huguel

Vincent Josselin

François Bertrand

Loïc Huguel

Mickaël Chave

The invention relates to a method for compensating a magnetic locator in the presence of a magnetic-field-disturbing material, comprising: an emitter () comprising at least one coil emitting an emission magnetic field; a receiver () comprising at least one receiving coil and a device providing a plurality of measurements Ipof a receiving magnetic field induced by the emission field in each receiving coil; and a processing unit () comprising a field model allowing the calculation of a position (P) and/or an orientation (Q) of the receiver by means of calculation of a prediction Hof the measurements according to a criterion (C) calculated according to an error Ewhich is itself calculated in relation to the measurements Ip. The invention is characterised in that the error Eis calculated by successive iterations from initial values prescribed by the prediction Has being the difference between the measurements Ipand a disturbed model Hp, according to the equation E=Ip&#x2212;Hp, the disturbed model Hpsatisfying Hp=H+P(&#x3b1;=&#x2212;arctan(&#x3b2;&#x3c9;), (I) the parameter &#x3b2; being identical for all of the measurements Ip, the calculation being carried out in such a way as to minimise the criterion C.

Method for compensating a magnetic locator, locator and computer program

The invention relates to a method for calibrating a magnetic locator, said magnetic locator including at least a transmitter and a receiver, the calibration method involving a third sensor constituted of a transceiver, said method including,

Method for calibrating a magnetic locator

The invention relates to an electromagnetic position tracking system, including: an electromagnetic field emission device including at least one emitter coil and, connected to the emitter coil, a first generator of an electric signal for exciting the emitter coil; a device for receiving the electromagnetic field emitted by the emission device, including at least one receiver coil, and, connected to the receiver coil, a circuit for reading an electric signal induced in the receiver coil; and a system for measuring at least one parameter of the reception device, including, connected to the receiver coil, a second generator of an electric signal for exciting the receiver coil.

Electromagnetic position tracking system

Growing community of inventors

Grenoble, France

Sandra Rousseau