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Apparatus and method for generating a uniform magnetic field

A technology of uniform magnetic field and magnetic field, which is applied in the direction of transmitting sensing components, measuring devices, magnets, etc. by using electric/magnetic devices, and can solve problems such as reducing sensor performance

Active Publication Date: 2018-01-09
ANALOG DEVICES INT UNLTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, stray magnetic fields can degrade sensor performance

Method used

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  • Apparatus and method for generating a uniform magnetic field
  • Apparatus and method for generating a uniform magnetic field
  • Apparatus and method for generating a uniform magnetic field

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Embodiment Construction

[0029] Various aspects of the novel systems, devices, and methods will be described more fully hereinafter with reference to the accompanying drawings. The teachings of the present disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover every aspect of the novel systems, devices, and methods disclosed herein, whether implemented independently of or in conjunction with any other aspects of the invention. Any other combination of aspects is implemented. For example, an apparatus may be implemented or a method practiced using any number of the aspects set forth ...

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Abstract

Apparatus and methods for generating a uniform magnetic field are provided herein. In some configurations, the magnetic structure includes one or more pairs of magnets within the housing. Each pair of magnets is arranged in parallel and includes magnetic poles reversed in polarity with respect to the other. For example, in some implementations, the first pair of magnets includes a first magnet and a second magnet arranged side-by-side, the north pole of the first magnet is adjacent to the south pole of the second magnet and the south pole of the first magnet is adjacent to the north pole of the second magnet. adjacent. The housing is implemented using a magnetically redirecting material that confines the magnetic flux and reduces stray magnetic fields. Magnetic structures can be used to generate a substantially uniform magnetic field within a region of interest.

Description

technical field [0001] The present invention relates generally to methods and systems for generating magnetic fields, and more particularly to methods and systems for generating uniform magnetic fields suitable for stimulating magnetoresistive (MR) devices. Background technique [0002] A magnetic field direction sensor can be used to measure the orientation of a magnetic field generating object, such as a permanent magnet, relative to the sensing axis of the magnetic field direction sensor. Thus, when carrying a magnet on a rotatable object, such as a shaft whose rotation is to be encoded, the angular displacement of the object can be determined in a contactless manner. [0003] One difficulty with certain magnetic field direction sensors is that such sensors may operate in part by stimulating the sensor with a uniform magnetic field. For example, an anisotropic magnetoresistive (AMR) sensor may include a magnetoresistive element having a resistance that varies according t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/00G01D5/12
CPCG01D5/145G01R33/091G01R33/093G01D2205/80G01D5/12H01F7/0284
Inventor A·P·帕兰B·P·小萨里诺D·P·特伦蒂诺
Owner ANALOG DEVICES INT UNLTD