There is disclosed a guidance assisting apparatus for aiding in the guidance of an agricultural vehicle ( 5 ) over arable land. The apparatus makes use of a GPS positional receiver ( 81 ) in order to determine if the vehicle ( 5 ) is overlapping previous passes of a paddock thereby reducing the likelihood of strips of land being double processed or left unprocessed. Guidance may be provided by a visual display or by power assisted steering.

Vehicle positioning apparatus and method

An integrated circuit includes a magnetic field sensor and an injection molded magnetic material enclosing at least a portion of the magnetic field sensor.

Integrated circuit including sensor having injection molded magnetic material

Embodiments related to the generation of magnetic bias fields for a magneto sensor are described and depicted

Bias field generation for a magneto sensor

One embodiment relates to a method of manufacturing a magnetic sensor. In the method, an engagement surface is provided. A magnet body is formed over the engagement surface by gradually building thickness of a magnetic material. The magnet body has a magnetic flux guiding surface that substantially corresponds to the engagement surface. Other apparatuses and methods are also set forth.

Methods and systems for magnetic sensing

A magnetic encoder has a high resolution track including a plurality of North/South pole pairs defining a plurality of pole junctions, and a reference track including a North/South pole pair defining a North/South pole junction aligned with a first pole junction of the high resolution track, and a South/North pole junction aligned with a second pole junction of the high resolution track. Only a single pole junction of the high resolution track is positioned between the first and second pole junctions of the high resolution track.

Magnetic encoder for producing an index signal

L'invention concerne un capteur numerique de position relative, comprenant un anneau magnetique multipolaire circulaire mobile en rotation en face d'un capteur magnetique fixe compose d'au moins deux elements sensibles, respectivement positionnes en regard de la piste principale (4) et de la piste de reference " top tour " (5), et un dispositif de traitement des signaux de sortie, tel que, sur l'anneau (1), est realise un motif magnetique (10) a partir d'une paire de poles Nord et Sud dont la transition est differente de la transition entre chaque pole Nord et Sud de l'anneau (1), et dont la largeur angulaire du pole Nord est differente au niveau de la piste de reference " top tour " (5). Les elements sensibles peuvent etre au nombre de trois, dont le premier (7) est situe en regard de la piste de reference (5) et dont les deux autres (61 et 62) sont situes en regard de la piste principale (4), ou bien realises sous forme de deux barrettes (20 et 21) paralleles.

Capteur digital de position relative

The invention relates to a digital sensor of relative position, which has a circular multipolar magnetic ring which is mobile in rotation opposite a stationary magnetic sensor comprised of at least two sensitive elements, respectively positioned facing a main track and a “revolution tick” reference track, and a device for processing of the output signals, such that on the magnetic ring, a magnetic pattern is produced from a pair of north and south poles whose transition is different from the transition between the other north and south poles of the magnetic ring, and of which the angular width of the north pole is different at the site of the “revolution tick” reference track. The sensitive elements can be three in number, the first of which faces reference track and of which the other two face the main track, or they can be produced in the form of two parallel bars.

Digital sensor of relative position

The invention concerns a digital relative position sensor, comprising a mobile circular multi-polar magnetic ring rotating opposite a fixed magnetic sensor consisting of at least two sensitive elements, respectively positioned opposite the main track (4) and the "top tour" reference track (5), and a device for processing output signals, such that, on the ring (1), is produced a magnetic pattern (10) from a pair of North and South poles whereof the transition is different from the transition between each North and South pole of the ring (1), and the angular width of the North pole is different at the "top tour" reference track (5). There can be three sensitive elements whereof the first (7) is located opposite the reference track (5) and the other two (61 and 62) are located opposite the main track (4), or produced in the form of parallel bars (20 and 21).

Digital relative position sensor

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Capteur digital de position relative

Digital sensor of relative position

Digital relative position sensor