Indoor positioning method based on inertial navigation system and WIFI (wireless fidelity)

An inertial navigation system and indoor positioning technology, applied in the field of mobile communications, can solve the problems of unsuitable long-term navigation and positioning, large cumulative errors, etc., and achieve the effect of improving indoor positioning accuracy, improving accuracy, and fast calculation speed

Inactive Publication Date: 2012-04-18
北京知势技术服务有限公司
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Problems solved by technology

[0019] In view of the above problems, the present invention provides an indoor positioning method based on an inertial navigation system and WIFI, which has high positioning accuracy and can effectivel

Method used

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  • Indoor positioning method based on inertial navigation system and WIFI (wireless fidelity)
  • Indoor positioning method based on inertial navigation system and WIFI (wireless fidelity)
  • Indoor positioning method based on inertial navigation system and WIFI (wireless fidelity)

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Embodiment Construction

[0035] The indoor positioning process of the method of the present invention is specifically described below:

[0036] See figure 1 , first initialize the positioning terminal device, the positioning terminal device obtains the WIFI wireless signal and selects the initial step value of 0.6m, and uses the WIFI wireless network to determine the initial position of the positioning terminal device using the positioning algorithm based on RSSI. The positioning algorithm based on RSSI: indoor The deployed AP wireless access point will periodically transmit wireless signals, and save the location coordinates of all APs during the deployment phase. When a person walks indoors, the person's location can be obtained using the centroid algorithm based on RSSI; or In the offline stage, the fingerprint map of the AP wireless signal is collected, and the fingerprint method is used to obtain the location information of the person in the online stage; or the probability distribution method b...

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Abstract

The invention provides an indoor positioning method based on an inertial navigation system and WIFI (wireless fidelity), which has high positioning accuracy and can effectively solve the problems that the existing inertial navigation system is not suitable for long-time navigation positioning due to large accumulative error in the positioning process. The method is characterized by comprising the autonomous positioning of the inertial navigation system and the auxiliary positioning of a WIFI wireless network, namely, comprising the following steps of: firstly, initializing a positioning terminal device to obtain a WIFI wireless signal and determine the initial position of the positioning terminal device through the WIFI wireless network, secondly, autonomously positioning the real-time position information of the positioning terminal device by using the inertial navigation system, and simultaneously calibrating the real-time position information through the WIFI wireless network and carrying out on-line adjustment on the step length information in the autonomous positioning of the inertial navigation system; and finally uploading the real-time position information of the positioning terminal device or the real-time position information calibrated by the WIFI wireless network through the WIFI wireless network and displaying the mobile trace of the positioning terminal device in the display system of the positioning terminal device.

Description

technical field [0001] The invention belongs to the field of mobile communication, and relates to a comprehensive indoor positioning method based on an inertial system and WIFI wireless signals, in particular to an indoor positioning method based on an inertial navigation system and WIFI. Background technique [0002] With the rapid development of mobile communication technology and the rapid increase of data and multimedia services, location-based services (LBS) are more and more popular, especially in complex indoor environments, such as restaurants, supermarkets, parking lots, warehouses, etc. , it is often necessary to determine the location information of the holder, facility or item of the mobile terminal. For example, when traveling outdoors, the mobile terminal positioning system can tell us the current location, and the location-based service system provides us with information on nearby tourist attractions, recommending nearby restaurants and hotels, etc.; indoors,...

Claims

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Application Information

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IPC IPC(8): G01C21/16H04W4/04
Inventor 熊永平马建张世哲宋峥
Owner 北京知势技术服务有限公司
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