Abstract: An instrumented bearing comprising a stationary outer ring and a rotating inner ring is provided with an encoder, a sensor assembly comprising a read head positioned opposite and at a reading distance from the encoder, and a leakage current collector capable of coming into sliding contact with an annular contact which can be rigidly connected, directly or indirectly, to the inner ring. The encoder and the read head are positioned axially between the outer ring and the leakage current collector. A conductive electrical connection between the leakage current collector and the stationary outer ring also forms a magnetic shield of ferromagnetic material, extending from the outer ring to the leakage current collector by surrounding the encoder and the read head.

Abstract: The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along a helix of pitch p and of angle ?, the magnetic track having Npp pairs of North and South poles and a polar width Lp measured along a normal to the transitions which are: Npp=?a/l and Lp=p·cos ?. The invention also includes at least one sensor able to detect the rotating magnetic field in a plane perpendicular to the magnetic track and to the transitions by means of a mounting of at least two sensitive magnetic elements. The mounting being disposed at a radial reading distance from the magnetic track and being arranged to deliver signals in quadrature.

Abstract: The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along a helix of pitch p and of angle ?, the magnetic track having Npp pairs of North and South poles and a polar width Lp measured along a normal to the transitions which are: Npp=?a/l, and Lp=p·cos ?. The invention also includes at least one sensor able to detect the rotating magnetic field in a plane perpendicular to the magnetic track and to the transitions by means of a mounting of at least two sensitive magnetic elements. The mounting being disposed at a radial reading distance from the magnetic track and being arranged to deliver signals in quadrature.

Abstract: The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along an helix of pitch p and of angle ?. The invention having Npp pairs of North and South poles and a polar width Lp measured along a normal (N) to the transitions which are: Npp=?a/I and Lp=p.cos ?. The invention also includes a sensor able to detect the period magnetic field emitted by the coder by means of at least two sensitive magnetic elements which are disposed at a radial reading distance from the magnetic track. The sensitive elements are disposed in relation to one another to deliver signals in quadrature.

Abstract: The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along a helix of pitch p and of angle ?, the magnetic track having Npp pairs of North and South poles and a polar width Lp measured along a normal to the transitions which are: Npp=?a/l and Lp=p·cos ?. The invention also includes at least one sensor able to detect the rotating magnetic field in a plane perpendicular to the magnetic track and to the transitions by means of a mounting of at least two sensitive magnetic elements. The mounting being disposed at a radial reading distance from the magnetic track and being arranged to deliver signals in quadrature.

Abstract: The invention relates to a system comprising a coder that has an alternation of North and South magnetic poles separated by transitions extending along an helix of pitch p and of angle ?. The invention having Npp pairs of North and South poles and a polar width Lp measured along a normal (N) to the transitions which are: Npp=?a/I and Lp=p.cos ?. The invention also includes a sensor able to detect the period magnetic field emitted by the coder by means of at least two sensitive magnetic elements which are disposed at a radial reading distance from the magnetic track. The sensitive elements are disposed in relation to one another to deliver signals in quadrature.