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A wireless positioning method and system for underground space

An underground space and wireless positioning technology, which is applied in radio wave measurement systems, positioning, wireless communication, etc., can solve the problems of low positioning accuracy and achieve the effects of low cost, simple operation, and good security effects

Active Publication Date: 2020-06-02
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defects of the prior art, the object of the present invention is to provide a wireless positioning method and system for underground space, aiming to solve the problem of low positioning accuracy existing in the existing underground space wireless positioning method

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  • A wireless positioning method and system for underground space
  • A wireless positioning method and system for underground space
  • A wireless positioning method and system for underground space

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0053]On the one hand, an embodiment of the present invention provides a wireless positioning method for underground space, refer to figure 1 , the method flow includes the following steps:

[0054] Step 1: Arrange wireless access points in the underground space and build a fingerprint library;

[0055] Such as figure 2 As shown in Fig. 1, wireless access point 1 and wireless access point 2 are arranged in the underground space with a distance of 80 meters, and the area is equally spaced between the two wireless access points, and the center point of the block area is selected as the fingerprint...

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Abstract

The invention discloses a wireless positioning method and system for an underground space. The wireless positioning method comprises the steps of arranging wireless access points in the underground space, and constructing a fingerprint database; acquiring RSSI information of the position of the target object, matching the RSSI information with the fingerprint database to obtain a predicted value of the position of the target object, acquiring inertial data, and performing track reckoning to obtain a measured value of the position of the target object; adopting Kalman filtering to fuse the predicted value and the measured value to obtain the position of a target person; and when no target object exists in the underground space, processing the CSI data sent by the wireless access point, anddetecting whether illegal invasion exists in real time. According to the method, the RSSI fingerprint positioning and the PDR positioning are fused through Kalman filtering, respective defects of theRSSI fingerprint positioning and the PDR positioning are overcome, and accurate positioning in narrow, closed and long-distance underground space can be achieved; only a small number of wireless access points need to be deployed and combined with widely applied smart phones, the cost is low, and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more particularly relates to a wireless positioning method and system for underground space. Background technique [0002] As we all know, with the rapid development of my country's economy, the construction and maintenance of urban underground space has become a key element to ensure the harmony and stability of the city. Such as subway construction, comprehensive pipeline construction, subsea tunnel construction, etc., all require regular maintenance by personnel. This type of area is a sensitive and dangerous area, and does not cover the common communication infrastructure on the ground. It is necessary to determine the location and location of the target personnel in the area. Status information is beneficial to protect maintenance personnel, realize comprehensive and real-time detection and scheduling, and ensure regional security. [0003] Current wireless positioning te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/021H04W4/30H04W64/00G01S5/02G01C21/16
CPCG01C21/165G01S5/0294H04W4/021H04W4/30H04W64/006
Inventor 王巍黄森张宁王盼江涛
Owner HUAZHONG UNIV OF SCI & TECH
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