Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Interference compensation method and device of geomagnetic sensor

A geomagnetic sensor and interference compensation technology, applied in the field of communication, can solve problems such as the difficulty of avoiding geomagnetic sensor interference, and achieve the effect of accurate geomagnetic three-axis data and rich experience effects

Active Publication Date: 2016-01-27
ZTE CORP
View PDF11 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic field generated by the changing current cannot be avoided by fixed compensation, so the geomagnetic sensor in the mobile phone will be placed away from the power line. For example, the safe distance of the 1A (ampere) power line is 1000 (mA ) / 10=100(mm); under the development trend of mobile phone motherboards getting smaller and smaller in size and with more and more complex functions, this condition is difficult to meet
[0006] Aiming at the problem that the interference to the geomagnetic sensor caused by the PCB power wiring in the related art is difficult to avoid, no effective solution has been proposed so far

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Interference compensation method and device of geomagnetic sensor
  • Interference compensation method and device of geomagnetic sensor
  • Interference compensation method and device of geomagnetic sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] image 3 According to the flow chart of establishing the functional relationship between the disturbance current value and the three-axis data of the geomagnetic sensor in Embodiment 1 of the present invention, such as image 3 As shown, establishing a functional relationship includes the following steps:

[0056] Step S302: First, it is necessary to determine the number of current sources that interfere with the geomagnetic sensor. In general, it is necessary to meet the requirements of: safety distance (mm) > current change (mA) / 10. When the layout and wiring around the geomagnetic sensor is determined, the distance between the current trace and the geomagnetism is known, and the current on the power trace can be estimated or predicted. If the requirements of the safety distance are not satisfied, the influence of the power wiring on the geomagnetic sensor needs to be considered;

[0057] Step S304: geomagnetic calibration. The purpose of geomagnetic calibration i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an interference compensation method and device of a geomagnetic sensor. The method comprise that it is determined that current of a power line interfere in the geomagnetic sensor; current values of the power line are obtained, and a tri-axial data compensation value is obtained according to the functional correspondence between the tri-axial data change value of the geomagnetic sensor and the current values; and the tri-axial data compensation value is subtracted from the present tri-axial data of the geomagnetic sensor. The method and device can be used to solve the problem that interference of the PCB power line in the geomagnetic sensor is hard to avoid, the output geomagnetic tri-axial data is more accurate, and thus abundant experience is provided when the geomagnetic sensor is applied.

Description

technical field [0001] The present invention relates to the communication field, in particular to an interference compensation method and device for a geomagnetic sensor. Background technique [0002] Geomagnetic sensors can realize electronic compass functions, inertial navigation and other applications. With the continuous development of micro-electro-mechanical system (Micro-Electro-Mechanical System, referred to as MEMS) manufacturing technology, processing technology and material technology. The research, manufacture and application of geomagnetic sensors have also reached an unprecedented level. At present, geomagnetic sensors can be divided into planar electronic compass and three-dimensional electronic compass according to the presence or absence of inclination compensation; they can also be divided into magnetoresistive effect sensors, Hall effect sensors and fluxgates according to the different technical principles of detecting geomagnetic distribution changes. s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01V3/40
CPCG01V3/40
Inventor 卢清
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com