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Thermal coefficients of nudge compensation and tare compensation for linear and rotary MR array position transducers

A technology of thermal compensation and magnetic linearity, applied in thermal compensation methods and systems, linear and rotational sensing applications, position detection devices, and magnetic sensors, can solve the problems of reluctance array placement determination algorithm errors, etc.

Active Publication Date: 2008-11-05
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This in turn introduces errors in the magnetoresistive array placement determination algorithm utilized

Method used

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  • Thermal coefficients of nudge compensation and tare compensation for linear and rotary MR array position transducers
  • Thermal coefficients of nudge compensation and tare compensation for linear and rotary MR array position transducers
  • Thermal coefficients of nudge compensation and tare compensation for linear and rotary MR array position transducers

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Embodiment Construction

[0043] The specific values ​​and configurations described in these non-limiting examples may vary and are cited to illustrate at least one embodiment only, and are not intended to limit the scope of the invention.

[0044] Figure 1 shows a top view of a magnetoresistive sensing system 100, which is depicted for general illustrative purposes and to describe the context in which the preferred embodiment may be implemented. System 100 generally includes one or more integrated circuit packages 118 , 120 , and 123 that include respective Wheatstone bridge circuits 112 , 114 , and 116 . System 100 may also incorporate the use of ASICs, Application Specific Integrated Circuits, which are not shown in FIG. 1 but which may be used to control multiple Wheatstone bridge circuits, such as bridge circuits 112 , 114 and 116 . Depending on design considerations, bridge circuits 112, 114, and 116 may each preferably be implemented as an anisotropic magnetoresistive (AMR) Wheatstone bridge cir...

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Abstract

Methods and systems are disclosed in which the errors caused by thermal expansion in magnetoresistive position transducers are reduced by predicting the physical alterations over temperature between centerline-to-centerline distances of particular magnetoresistive sensors or components within a magnetoresistive array and also between such an array and a magnet being sensed caused by thermal expansion.

Description

[0001] Related Application Cross Reference [0002] This patent application is a continuation of U.S. Patent Application 10 / 993,964, filed November 18, 2004, entitled "Angular Position Detection Utilizing a Plurality of Rotary Configured Magnetic Sensors" application, the disclosure of which is incorporated herein by reference in its entirety. This patent application is also a continuation of U.S. Patent Application 11 / 088,104, filed March 23, 2005, entitled "Position Detection Apparatus and Method for Linear and Rotary Sensing Applications" , the disclosure of which is also incorporated herein by reference in its entirety. technical field [0003] Embodiments of the invention generally relate to sensor methods and systems. Embodiments also relate to position detection devices. Embodiments additionally also relate to magnetic sensors. Embodiments also relate to methods and systems for linear and rotational sensing applications. Embodiments also relate to thermal compensat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D3/036
CPCG01D3/032G01D5/145G01D3/0365
Inventor A·M·徳米特里夫C·B·约翰逊L·F·里克斯M·J·拉托里亚
Owner HONEYWELL INT INC