Minmaxmedical

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

Mickael Chave

Sandra Rousseau

Loic Huguel

Stephane Lavallee

Saifeddine Aloui

Francois Bertrand

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

A method for detecting an anomaly, associated with a magnetic locating device including a first magnetic element and a second magnetic element that are associated with a first object and with a second object, respectively. The first object includes a first movement sensor configured to determine a first datum dependent on inclination of the first object in a basic reference frame, or the terrestrial reference frame. The method includes: determining the first datum from the first movement sensor; determining a second datum dependent on inclination of the second object in the basic reference frame; determining at least one orientation parameter with the magnetic locating device using the first and second magnetic elements; using the at least one orientation parameter and the first and second data to generate an indicator of presence of the anomaly.

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Saint Egreve, France

Mickael Chave