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Method and system for indoor positioning based on inertial sensor and wireless signal characteristics

An inertial sensor and wireless signal technology, applied in wireless communication, wireless communication services, electrical components, etc., can solve the problems of large cumulative error of inertial navigation system, inability to use for a long time, inaccurate positioning, etc., to improve accuracy and calculation speed Fast, correcting the effect of accumulated errors

Active Publication Date: 2013-02-13
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0017] The purpose of the present invention is to overcome the above defects in the prior art and provide an indoor positioning method and system based on inertial sensors and wireless signal characteristics with high positioning accuracy and a combination of static and dynamic, which can overcome the instability of wireless signals during movement The problem of inaccurate positioning can be solved, and it can also solve the problem that the inertial navigation system has a large cumulative error and cannot be used for a long time

Method used

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  • Method and system for indoor positioning based on inertial sensor and wireless signal characteristics
  • Method and system for indoor positioning based on inertial sensor and wireless signal characteristics
  • Method and system for indoor positioning based on inertial sensor and wireless signal characteristics

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Embodiment

[0041] Such as figure 1 As shown, an indoor positioning method based on inertial sensors and wireless signal characteristics, the method includes the following steps:

[0042]1) The wireless signal feature method is used to initialize the position of the positioning target in a given space, and the positioning target remains relatively static during the initial process.

[0043] The wireless signal characteristic method specifically includes: deploying multiple wireless receiving nodes in a given space, when the positioning target is in a static state, the handheld device continuously sends a series of broadcast packets for positioning, and the wireless receiving nodes will generate real-time RSSI Probability distribution, matching the probability distribution with the pre-stored RSSI probability distribution to determine the position of the positioning target. The pre-stored RSSI probability distribution is obtained according to the following method: offline collection of fi...

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Abstract

The invention relates to a method and a system for indoor positioning based on an inertial sensor and wireless signal characteristics. The method comprises the following steps of: initializing the position of a positioning target in the space by a wireless signal characteristics method; detecting the motion state of the positioning target, if the positioning target is in an idle state, positioning the positioning target by the wireless signal characteristics method; if the positioning target is in a moving state, taking the last positioning point in idle state as the starting point to generate the movement locus of the positioning target by the inertial sensor, displaying the position and movement locus of the positioning target on a handheld device in real time, and simultaneously uploading the real-time position information to a background processing device via a wireless network. The system provided by the invention comprises the handheld device with the inertial sensor, wireless receiving nodes arranged in the indoor space, and the background processing device connected with the inertial sensor. Compared with the prior art, the method and the system have the advantages of high positioning precision, association of activity and inertia, and the like.

Description

technical field [0001] The invention relates to a positioning method and system in the field of mobile communication, in particular to an indoor positioning method and system based on inertial sensors and wireless signal characteristics. Background technique [0002] With the rapid growth of information, how to deal with big data and how to provide reliable information has become the key. Attaching positioning tags to information has become one of the most commonly used processing methods. With the popularity of mobile and personal devices, location is all the rage. The positioning system can determine the location information of the device, and at the same time use the location information for location-based services, such as navigation, tracking, monitoring, etc. According to the scope of use, location-based services mainly include outdoor positioning applications and indoor positioning applications. Let's talk about their implementation principles: [0003] 1. Outdoor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04
Inventor 陆佳亮
Owner SHANGHAI JIAO TONG UNIV
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