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Localization method, device and system based on geomagnetism and WIFI

A technology of geomagnetism and location points, applied in the field of communication, can solve problems such as WIFI signal interference, expensive Bluetooth devices, and the impact of Bluetooth device stability, and achieve the effect of reducing labor costs

Active Publication Date: 2014-12-10
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Bluetooth devices are expensive, and the stability of Bluetooth devices in complex space environments will also be affected
[0003] With the promotion and popularization of wireless fidelity (WIreless FIdelity, WIFI for short) technology, while providing network services indoors, large-scale positioning can also be achieved through empirical models, signal propagation models, etc., but due to the coverage of WIFI equipment The radius is small, and it is impossible to spread to every area indoors and outdoors; in addition, WIFI signals are easily interfered by other signals, so the positioning accuracy based on WIFI devices is not high

Method used

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  • Localization method, device and system based on geomagnetism and WIFI

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Embodiment 1

[0027] figure 1 A schematic flow chart of a positioning method based on geomagnetism and WIFI provided by an embodiment of the present invention, such as figure 1 As shown, the embodiment of the present invention includes the following steps:

[0028] Step 101, acquire sensor data of the mobile terminal, wherein the sensor data includes gyroscope data, acceleration data and geomagnetic data.

[0029] Step 102, if it is determined by the gyroscope data that the mobile terminal is going straight, and it is determined by the acceleration data that the movement distance of the mobile terminal exceeds the preset threshold, according to the WIFI data and geomagnetic data obtained within the set time period after exceeding the preset threshold to locate.

[0030] In step 101, the sensor data is obtained through the sensor on the mobile terminal, specifically, the gyroscope data is obtained through the gyroscope on the mobile terminal, the acceleration data of the mobile terminal is...

Embodiment 2

[0033] figure 2 A schematic flow chart of a positioning method based on geomagnetism and WIFI provided for another embodiment of the present invention, such as figure 2 Said, the embodiment of the present invention comprises the following steps:

[0034] Step 201, acquire sensor data of the mobile terminal, wherein the sensor data includes gyroscope data, acceleration data and geomagnetic data, and step 202 is executed.

[0035] In step 201, the sensor data is obtained through the sensor on the mobile terminal. In one embodiment, the gyroscope data is obtained through the gyroscope on the mobile terminal, the acceleration data of the mobile terminal is obtained through the acceleration sensor, and the geomagnetic field of the mobile terminal is obtained through the geomagnetic sensor. Data, the WIFI data is obtained by the WIFI signal receiver on the mobile terminal; in another embodiment, the gyroscope data is the angular acceleration of the mobile terminal, and the geomag...

Embodiment 3

[0049] image 3 for figure 2 A schematic flow chart of the positioning method based on geomagnetism and WIFI in step 207 of the illustrated embodiment, Figure 4 for image 3 Schematic representation of the geomagnetic data in the illustrated embodiment, as image 3 As shown, in the aforementioned figure 2 On the basis of the illustrated embodiment, step 207 can be implemented through the following steps:

[0050] Step 301, making statistics on WIFI data acquired within a predetermined period of time.

[0051] Step 302, filtering out WIFI data whose occurrence times are less than a set number of times.

[0052] In step 303, the signal strength of the filtered WIFI data is averaged according to the number of occurrences to obtain the WIFI data with the strongest average signal strength.

[0053] In step 304, the mobile terminal is roughly positioned according to the WIFI data with the strongest average signal strength obtained in step 303.

[0054] Step 305, search all...

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Abstract

The invention provides a localization method, a device and a system based on geomagnetism and WIFI. The localization method comprises the following steps: acquiring sensor data of a mobile terminal, wherein the sensor data comprises gyroscope data, acceleration data and geomagnetism data; and localizing the mobile terminal according to WIFI data acquired in a set time period exceeding a preset threshold and the geomagnetism data if determining that the mobile terminal moves straightly according to the gyroscope data and determining that the movement distance of the mobile terminal exceeds a preset threshold according to the acceleration data. By virtue of the localization method, the device and the system, the high-accuracy localization of the mobile terminal is achieved by virtue of the geomagnetism and WIFI; as the localization process is free of manual intervention, the labor cost is greatly reduced; in addition, the high-accuracy localization position of the mobile terminal is obtained by the high-accuracy localization and tracking of the mobile terminal, so that the localization position obtained by the localization method, the device and the system is also capable of generating relatively high-accuracy indoor graph information.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a positioning method, device and system based on geomagnetism and WIFI. Background technique [0002] In the prior art, a specific location point is marked indoors for each device based on low-power bluetooth technology, and positioning is performed according to the strength of the bluetooth signal. For a mobile user with an integrated Bluetooth function, when a Bluetooth signal is detected, the distance to the Bluetooth device can be judged according to the strength of the Bluetooth signal, and then the location of the mobile user can be calculated. But the Bluetooth device is expensive, and the stability of the Bluetooth device will be affected in a complex space environment. [0003] With the promotion and popularization of wireless fidelity (WIreless FIdelity, WIFI for short) technology, while providing network services indoors, large-scale positioning can als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/00H04W64/00
CPCG01C21/00
Inventor 贾海禄
Owner BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD