公开(公告)号：DE60043857D1

公开(公告)日：2010-04-01

申请号：DE60043857

申请日：2000-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12

Abstract: The present invention relates to a magnetostrictive sensor for measuring a torque in a shaft. The sensor comprises at least one active magnetostrictive region on the shaft, a surface pattern in the magnetostrictive region such that it obtains anisotropic properties, a first means arranged to generate a magnetic field varying in time in the magnetostrictive region and a second means arranged to sense variation in the permeability in the magnetostrictive region. Said magnetostrictive region comprises a first layer of a magnetostrictive material which is provided on the surface of the shaft and that said surface pattern is formed by a second layer of a non-magnetostrictive material comprising a low resistivity.

公开(公告)号：SE9904572D0

公开(公告)日：1999-12-14

申请号：SE9904572

申请日：1999-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12 ,  G01L

Abstract: The present invention relates to a magnetostrictive sensor for measuring a torque in a shaft. The sensor comprises at least one active magnetostrictive region on the shaft, a surface pattern in the magnetostrictive region such that it obtains anisotropic properties, a first means arranged to generate a magnetic field varying in time in the magnetostrictive region and a second means arranged to sense variation in the permeability in the magnetostrictive region. Said magnetostrictive region comprises a first layer of a magnetostrictive material which is provided on the surface of the shaft and that said surface pattern is formed by a second layer of a non-magnetostrictive material comprising a low resistivity.

公开(公告)号：AU2417401A

公开(公告)日：2001-06-25

申请号：AU2417401

申请日：2000-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12

Abstract: The present invention relates to a magnetostrictive sensor for measuring a torque in a shaft. The sensor comprises at least one active magnetostrictive region on the shaft, a surface pattern in the magnetostrictive region such that it obtains anisotropic properties, a first means arranged to generate a magnetic field varying in time in the magnetostrictive region and a second means arranged to sense variation in the permeability in the magnetostrictive region. Said magnetostrictive region comprises a first layer of a magnetostrictive material which is provided on the surface of the shaft and that said surface pattern is formed by a second layer of a non-magnetostrictive material comprising a low resistivity.

公开(公告)号：SE9904572L

公开(公告)日：2001-06-15

申请号：SE9904572

申请日：1999-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12

Abstract: The present invention relates to a magnetostrictive sensor for measuring a torque in a shaft. The sensor comprises at least one active magnetostrictive region on the shaft, a surface pattern in the magnetostrictive region such that it obtains anisotropic properties, a first means arranged to generate a magnetic field varying in time in the magnetostrictive region and a second means arranged to sense variation in the permeability in the magnetostrictive region. Said magnetostrictive region comprises a first layer of a magnetostrictive material which is provided on the surface of the shaft and that said surface pattern is formed by a second layer of a non-magnetostrictive material comprising a low resistivity.

公开(公告)号：ES2339328T3

公开(公告)日：2010-05-19

申请号：ES00987906

申请日：2000-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12

Abstract: Un detector magnetoestrictivo para medir un par de torsión en un eje (1), en el que el detector comprende al menos una región magnetoestrictiva activa (2) en el eje (1), un patrón de superficie sobre la región magnetoestrictiva (2), de manera que obtiene propiedades anisotrópicas, un primer medio (5) dispuesto para genera un campo magnético variable con el tiempo en la región magnetoestrictiva (2) y un segundo medio (9) dispuesto para detectar variaciones en la permeabilidad en la región magnetoestrictiva (2) y en el que dicha región magnetoestrictiva (2) comprende una primera capa (3) de un material magnetoestrictivo proporcionado sobre la superficie del eje (1) caracterizado por que dicho patrón de superficie está formado por una segunda capa (4) de un material no magnetoestrictivo que tiene una resistividad que es menor que la resistividad del material de la primera capa (3), en el que dicha primera capa (3) tiene un espesor que es mayor que la profundidad de penetración del material magnetoestrictivo y en el que dicha segunda capa (4) tiene un espesor que es menor que la profundidad de penetración en la primera capa y mayor que la profundidad de penetración multiplicada por el cociente entre la resistividad del material en la segunda capa (4) y la resistividad del material en la primera capa (3).

公开(公告)号：AT458188T

公开(公告)日：2010-03-15

申请号：AT00987906

申请日：2000-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12

Abstract: The present invention relates to a magnetostrictive sensor for measuring a torque in a shaft. The sensor comprises at least one active magnetostrictive region on the shaft, a surface pattern in the magnetostrictive region such that it obtains anisotropic properties, a first means arranged to generate a magnetic field varying in time in the magnetostrictive region and a second means arranged to sense variation in the permeability in the magnetostrictive region. Said magnetostrictive region comprises a first layer of a magnetostrictive material which is provided on the surface of the shaft and that said surface pattern is formed by a second layer of a non-magnetostrictive material comprising a low resistivity.

公开(公告)号：SE517710C2

公开(公告)日：2002-07-09

申请号：SE9904572

申请日：1999-12-14

Applicant: ABB AB

Inventor： WALLIN CHRISTER ,  LING HANS ,  HASSEL LARS

IPC: G01L3/10 ,  H01L41/12

Abstract: The present invention relates to a magnetostrictive sensor for measuring a torque in a shaft. The sensor comprises at least one active magnetostrictive region on the shaft, a surface pattern in the magnetostrictive region such that it obtains anisotropic properties, a first means arranged to generate a magnetic field varying in time in the magnetostrictive region and a second means arranged to sense variation in the permeability in the magnetostrictive region. Said magnetostrictive region comprises a first layer of a magnetostrictive material which is provided on the surface of the shaft and that said surface pattern is formed by a second layer of a non-magnetostrictive material comprising a low resistivity.