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Portable electronic device with electronic compass and electronic compass emendation method

A calibration method and technology of electronic devices, applied in compass, measuring device, size/direction of magnetic field, etc., capable of solving problems such as changes in electronic compass magnetic field

Active Publication Date: 2011-02-09
HTC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plugging and unplugging operations of these magnetic accessories on the portable electronic device will cause the magnetic field around the electronic compass to change, resulting in high-frequency correction operations being performed

Method used

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  • Portable electronic device with electronic compass and electronic compass emendation method
  • Portable electronic device with electronic compass and electronic compass emendation method
  • Portable electronic device with electronic compass and electronic compass emendation method

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Embodiment Construction

[0018] In the present invention, in a portable electronic device combined with navigation functions such as pointing and positioning, such as a personal digital assistant (PDA), a mobile phone, a smart phone (smart phone) or a global positioning system (GPS), etc., through Set up a sensor in the device to detect the stylus or a magnetic accessory and check the state of the electronic compass to determine whether the abnormal magnetic field is a known temporary magnetic field change, so as to determine whether to perform electronic compass correction. .

[0019] Please refer to figure 1 , figure 1 It is a schematic diagram of the first embodiment of the portable electronic device 1 with the calibration sensor disclosed in the present invention. The portable electronic device 1 includes an electronic compass 13 disposed at a second position II in the casing 10 . The electronic compass 13 can detect the earth's magnetic field and output azimuth data for use by the portable elec...

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PUM

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Abstract

The invention relates to a portable electronic device with an electronic compass and a correction method of the electronic compass. The temporary magnetic field interference, such as a stylus, can be effectively judged, through mutual status combined inspection of one or more mechanical or electronic sensors and the electronic compass, to reduce the high-frequency compass correction. When the electronic compass detects an abnormal magnetic field, whether the status of the senor is changed is inspected, if so, the abnormal magnetic field is determined as a temporary magnetic field caused by the movement of a stylus or a magnetic accessory in the device, and the electronic compass does not perform correction and continues magnetic field detection according to the former working setting value after the abnormal magnetic field disappears to reduce the frequency of correction.

Description

technical field [0001] The invention relates to an azimuth indicating device, in particular to a correction device and a related method for the azimuth indicating device. Background technique [0002] With the rapid development of integrated circuits and electromechanical integration technologies, electronic products with navigation and positioning functions are becoming more and more diverse. Among them, electronic compasses provide Equivalent to the ability of the traditional compass. As one type of electronic compass, the magnetic inductive electronic compass provides the azimuth angle data represented by the angle change between the geomagnetic north direction and the target direction as the main sensing data for direction guidance. Usually, the magnetic induction electronic compass contains one or more than two magnetometers - a device that can detect magnetic fields or magnetic elements with one or more directions of magnetic fields, and the magnetic induction electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C17/32G01C17/38G01R33/02
Inventor 陈赞元赖玉鹏
Owner HTC CORP