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Bridge sensor error check

一种传感器、错误检测的技术，应用在交流/直流测量电桥、仪器、测量电等方向，能够解决读出链冗余等问题，达到减小影响的效果

Active Publication Date: 2018-11-23
MELEXIS ELECTRONIC TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the case of silicon-based integrated circuits, this results in more silicon surface due to the full redundancy of the readout chain

Method used

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  • Bridge sensor error check
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Embodiment Construction

[0043] The present invention will be described with respect to particular embodiments and with reference to certain drawings but the invention is not limited thereto but only by the claims. The drawings described are only schematic and non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. The dimensions and relative dimensions do not correspond to actual reductions for the practice of the invention.

[0044] Furthermore, the terms first, second etc. in the description and claims are used to distinguish between similar elements and not necessarily to describe a sequence in time, space, order or in any other way. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.

[0045] It is to be noted that the term "comprising...

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Abstract

A method (400) for detecting an error in a bridge sensor (100) which is adapted for measuring a physical parameter. The method comprises biasing (410) a first contact pair of the bridge sensor (100) at least two times in a first direction and at least one time in a second direction opposite to the first direction; while biasing the first contact pair, measuring (420) an output signal on a different contact pair of the bridge sensor, thus obtaining at least three output measurements which are representative for the physical parameter and which are separated by time intervals; combining (430) the output measurements to obtain an output value which is indicative for an error in the bridge sensor, wherein the output measurements which are combined are only those output measurements which are measured when biasing the first contact pair.

Description

technical field [0001] The invention relates to the field of bridge sensors. More specifically, it relates to methods and systems for detecting hardware failures in bridge sensors. Background technique [0002] Bridge sensors typically operate by biasing one contact pair and measuring the output signal on the other contact pair. The output signal is typically a differential signal that varies due to changes in the resistance value in the bridge sensor. Due to changes in physical parameters, the resistance value in bridge sensors can vary. A physical parameter may eg be an external pressure or an external magnetic field. [0003] A bridge sensor can be, for example, a magnetic sensor which can be used in many applications. Many of these applications are safety-critical applications, such as for example in the automotive industry. Therefore, the correct functioning of these sensors is very important, and preferably this can be tested when the magnetic sensor is started up...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/00G01D18/00G01R31/2829G01R17/10G01R33/0029G01R33/07G01L27/00G01R33/093G01L9/04G01R33/098
Inventor J·毕尔巴鄂德蒙迪扎巴尔M·泊札特G·克洛斯
Owner MELEXIS ELECTRONIC TECH CO LTD
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