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Magnetic position sensor, system and method

A sensor and sensing system technology, applied in the field of sensors, can solve problems such as inaccurate solutions, complex mathematical calculations, and difficult calculations

Active Publication Date: 2016-02-03
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Other solutions are inaccurate and / or require complex mathematical calculations that are difficult to perform with limited silicon area

Method used

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  • Magnetic position sensor, system and method
  • Magnetic position sensor, system and method
  • Magnetic position sensor, system and method

Examples

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Embodiment Construction

[0027] Embodiments relate to magnetic position sensors.

[0028] figure 1 A magnet 100 and a sensor system 102 configured to sense the position of the magnet are depicted. The magnet 100 is most commonly a source of a magnetic field and may in embodiments include a permanent magnet, an electromagnet, coil windings, or some other configuration. like figure 1 In the orientation in , the magnet is magnetized in the vertical (Z) direction and the sensor system 102 senses the linear position of the magnet 100 in the x-axis, but in other embodiments these directions and axes may be different. The specific axes, coordinate systems, and orientations used throughout this document are for example and convenience of illustration only and are not fixed in space. Instead, the x, y, and z axes are used to describe the three vertical axes of the axis system, which may be oriented in any spatial direction and which may be fixed, moving, and / or rotating relative to the earth's coordinate sy...

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Abstract

The invention discloses a magnetic position sensor, system and method. In one embodiment, a position sensing system includes a magnetic field source having a dipole moment in a direction along the z-axis; and a sensor module spaced a distance y0 from the center of the dipole moment along the y-axis and connected to the dipole along the z-axis The centers of the moments are separated by a distance z0, at least one of the magnetic field source or the sensor module is configured to move relative to the other along a path in the y=y0 plane, the sensor module is configured to be based on the ratio of the gradient dBz / dx to the gradient dBz / dy The relative positions of the magnetic field source and the sensor module with respect to the path are determined, where Bz is the component of the magnetic field associated with the permanent magnet, and where the x, y, and z axes are at right angles.

Description

technical field [0001] The present invention relates generally to sensors, and more particularly to magnetic position sensors. Background technique [0002] Magnetic sensors can be used for linear position sensing (ie, sensing the position of an object in one dimension) as well as multi-dimensional position sensing. A permanent magnet is attached to the target, and the magnetic field of the magnet is measured by a magnetic sensor. [0003] But conventional solutions for position sensing using magnetic sensors have some drawbacks. Some solutions do not have the ability to sense position in multiple dimensions. Other solutions are inaccurate and / or require complex mathematical calculations, which are difficult to perform with limited silicon area. [0004] Accordingly, improved magnetic position sensors, sensing systems and methods are needed. Contents of the invention [0005] Magnetic position sensors, systems and methods are disclosed. [0006] In one embodiment, a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/12
CPCG01D5/145G01R33/022G01D2205/40G01B13/02G01R33/077G01R33/095
Inventor 乌多·奥塞尔勒基纳费迪南德·卡斯汀格尔阿明·萨茨
Owner INFINEON TECH AG
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