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Sensor

A technology of a sensor device and a magnetic field sensor, which is applied in the field of sensors, can solve uneconomical problems and achieve the effect of low sensitivity

Inactive Publication Date: 2009-10-28
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complete sensor part consists of two independently arranged sensors mounted perpendicular to the substrate, so this solution is multi-chip and uneconomical

Method used

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Experimental program
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Embodiment Construction

[0030] FIG. 1 illustrates a schematic diagram of four sensor devices 1 according to the invention. Figure 1a The permanent magnet 2 is shown in the lower part of the plane 3 containing the sensor, called the sensing plate 3 . A columnar strut 4 is placed on the upper part of the induction plate 3 . The strut 4 is mounted in a rotatable or twistable manner, wherein the mechanical connection of the drive element to the strut 4 can be realized, for example, outside the housing. The major axis of rotation 5 of the cylindrical strut 4 is perpendicular to the sensor surface. The underside part 6 of the cylindrical strut 4 closest to the sensor surface of the induction plate 3 is made of magnetically permeable material. When the surface of the lower part is completely parallel to the surface of the sensor, the rotation of the strut around its long axis will not change the orientation of the lower surface relative to the sensor 3 . However, once the underside part 6 of the pole 4 i...

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Abstract

The invention relates to a sensor arrangement (1) comprising a magnet (2), a magnet ic field sensor (3) and a twistable or rotatable rod (4), characterized in that the magnet (2) is arranged below the magnetic field sensor (3) and the twistable or rotatable rod (4) is arranged above the magnetic field sensor (3), wherein the rod (4) comprises a lower surface (6) generating a tilt angle between the surface and the plane of the magnetic field sensor.

Description

technical field [0001] The invention relates to sensor devices, in particular magnetoresistive effect sensors, more precisely to sensors based on anisotropic magnetoresistance (AMR). Background technique [0002] Angle sensors based on AMR technology consist of an assembly comprising a magnetic sensing element made of nickel-iron alloy and capable of measuring the direction of the external magnetic field and an external permanent magnetic structure that generates an external magnetic field according to the prior art. A permanent magnet is attached to the mechanism whose angle is to be measured. Changing the orientation of the mechanism changes the orientation of the permanent magnet and thus the direction of the magnetic field measured by the sensor. The permanent magnet must generate a magnetic field strong enough that the direction of the magnetic field strength inside the sensing material is substantially parallel to the external magnetic field. [0003] For AMR compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/14
CPCG01D5/147
Inventor 汉斯·范索恩
Owner NXP BV