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Orientation Correction Method for Smartphones

A smart phone and direction correction technology, applied in the field of correction, can solve the problems of uncorrectable location error, uncorrectable error, low direction measurement accuracy, etc.

Inactive Publication Date: 2016-03-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the current smart phone cannot correct the error caused by its own posture and the error caused by the geographical position when sensing the direction, resulting in low accuracy of direction measurement. The invention provides a smart phone The direction correction method of

Method used

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  • Orientation Correction Method for Smartphones
  • Orientation Correction Method for Smartphones
  • Orientation Correction Method for Smartphones

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0016] Specific implementation mode one: combine image 3 Describe this embodiment, the direction correction method of smart phone described in this embodiment, it comprises the following steps:

[0017] Step 1: The communication system in the service area of ​​the positioning system periodically broadcasts the magnetic declination θ and magnetic inclination of the service area

[0018] Step 2: The smart phone to be calibrated according to the received magnetic declination θ and magnetic inclination Combined with the mobile phone inclination angle α obtained by the gravity sensor of the smart phone to be corrected, the direction measurement value ρ is corrected to obtain the corrected direction angle Ω of the smart phone to be corrected.

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment is a further limitation of the method for correcting the orientation of a smart phone described in Embodiment 1.

[0020] According to the received magnetic declination θ and magnetic inclination, the smart phone to be corrected in the step 2 Combined with the mobile phone inclination α obtained by the gravity sensor of the smart phone to be corrected, the method of correcting the direction measurement value ρ to obtain the corrected direction angle Ω of the smart phone to be corrected is as follows:

[0021] First, according to the formula get y;

[0022] The y is the correction value of the magnetic sensor indication of the y-axis in the plane Cartesian coordinate system when the gravity sensor of the smart phone to be corrected measures that the inclination angle is 0,

[0023] The y' is the inclination measured by the gravity sensor of the smart phone to be corrected as When is the magnetic sensor indication of the y-axis in the p...

specific Embodiment approach 3

[0029] Embodiment 3: This embodiment is a further limitation of the method for correcting the direction of a smart phone described in Embodiment 1 or 2. The communication system described in step 1 is the communication system of the mobile base station or the positioning system itself.

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Abstract

The invention relates to a correction method, in particular to a direction correction method of a smartphone. The direction correction method aims to solve the problems that when an existing smartphone senses the direction, errors caused by gestures of the smartphone can be not corrected, errors caused by geographic positions can not be corrected, and direction measuring precision is low. The direction correction method comprises the following steps that firstly, a communication system in a locating system service area periodically broadcasts the magnetic declination theta and the magnetic inclination in the service area, and secondly, a smartphone inclination alpha of a smartphone to be corrected is obtained according to the received magnetic declination theta and the magnetic inclination with a gravity sensor of the smartphone to be corrected, and the corrected direction angle omega of the smartphone to be corrected is obtained by correcting a direction measuring value p. The direction correction method is applied to a fingerprint locating system of a smartphone.

Description

technical field [0001] The invention relates to a correction method, in particular to a direction correction method for a smart phone. Background technique [0002] With the gradual increase of people's demand for location-based services (LBS), positioning capabilities have become an indispensable part of smart phone terminals. In smart phones, the direction information required for positioning and navigation is collected through an electronic compass. [0003] The electronic compass works by sensing the earth's magnetic field through a magnetic sensor. The measurement results of the earth's magnetic field are usually described by geomagnetic elements (north strength, east strength, vertical strength, magnetic declination, magnetic inclination, geomagnetic strength and horizontal strength). The electronic compass not only senses the angle between the terminal and the horizontal strength. sense of direction. [0004] However, the attitude of the user holding the terminal h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/24H04W64/00
Inventor 孟维晓邹德岳韩帅贾子庆李缙强
Owner HARBIN INST OF TECH