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A communication method and system

A communication method and coordinate system technology, applied in the field of communication systems, can solve problems such as influence and magnetic disturbance influence

Inactive Publication Date: 2016-12-07
BROADCOM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they can be severely affected by magnetic disturbances generated by indoor man-made infrastructure, for example
These disturbances can affect the orientation derived from the magnetometer's magnetic field measurements

Method used

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Embodiment Construction

[0043] Some embodiments of the invention relate to methods and systems for self-calibrating multi-magnetometer platforms. In various embodiments of the invention, the multi-magnetometer device or multi-magnetometer platform comprises at least two three-axis magnetometers aligned along the z-axis of the XYZ coordinate system and positioned in the XYZ coordinate system Physical incremental rotation in the xy-plane. At least two physically rotating three-axis magnetometers can be used to measure the respective magnetic fields. Using the magnetic field measurements of a physically rotating magnetometer, rotation measurements along a complete 360 ​​degree circle of a single orthogonal axis can be obtained without user assistance and / or magnetometer movement. A magnetometer that automatically corrects for physical rotation using rotation measurements. Multi-magnetometer devices combine magnetic field measurements from physically rotating magnetometers for magnetic disturbance dete...

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Abstract

The invention relates to a communication method and system, and discloses a multi-magnetometer device, which includes at least two three-axis magnetometers aligned along the z-axis and physically rotating, and the three-axis magnetometers are used to measure corresponding magnetic fields. Magnetic field measurements are used to measure rotational measurements along a complete 360-degree circle around a single orthogonal axis to calibrate the magnetometer, without user assistance and / or magnetometer movement. If no magnetic disturbance is detected, the multi-magnetometer device can use the magnetic field measurements to calculate its own magnetic heading. When a magnetic disturbance is detected, a disturbance mitigation process is performed. Rotational measurements are generated by selectively combining magnetic field measurements. The hard iron component is determined from the rotational measurements and removed from the magnetic field measurements. The soft-iron component is determined from the hard-iron-free magnetic field measurement and removed from the hard-iron-free magnetic field measurement. The resulting undisturbed magnetic field measurements are used to calculate magnetic heading.

Description

technical field [0001] The present invention relates to communication systems, and more particularly, to a method and system for self-calibrating a multi-magnetometer platform. Background technique [0002] A magnetometer is an instrument used to measure the strength and direction of various magnetic fields, such as the Earth's magnetic field. For example, the Earth's magnetic field can be used to orient a moving vehicle or pedestrian. For example, the orientation of a moving pedestrian is defined as the angle formed between the pedestrian's longitudinal axis and magnetic north. Magnetometers come in many different forms. A magnetometer triad is a magnetometer capable of measuring all three orthogonal components of a magnetic field. The geomagnetic field readings provided by the three-axis magnetometer can be used to calculate the orientation of moving vehicles or pedestrians. Magnetometers work very well in clean magnetic field environments such as outdoors. However, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01C21/08
CPCG01C17/38G01R33/02G01V3/40
Inventor 曼纽尔·德尔·卡斯蒂略史蒂夫·马尔科斯
Owner BROADCOM CORP