Accurate positioning method and system for target

Abstract

The invention discloses an accurate positioning method and an accurate positioning system for a target, which are used for positioning the target which is provided with a tag. The accurate positioning method is characterized in that: in the target positioning process, a node sends a broadcast signal to notify the tag within the distance measurement range to prepare for distance measurement; the tag identifies the broadcast signal and sends a distance measurement signal to the node; the node receives the distance measurement signal and then sends an acknowledgement signal to the tag after the response treatment; the tag receives the acknowledgement signal and sends the acknowledgement signal back to the node; and the node calculates the distance between the tag and the node based on time information carried in the sent-back acknowledgement signal, and the sends the calculated distance value to a central server so as to position the target. As the signals are symmetrically received and sent in multiple rounds between the nodes and the tag, the relative distance between the node and the tag can be determined by obtaining an average value of the relative distances between the nodes and the tag, in this way, the tag is positioned. Therefore, according to the accurate positioning method and the accurate positioning system for the target, the interferences of noises and multipath signals are avoided, and the positioning accuracy is increased.

Description

technical field [0001] The invention relates to a positioning method and system, in particular to a method and system for precise positioning of an object. Background technique [0002] With the development of science and technology, electronic positioning methods are increasingly used in the field of security. In some specific areas, for example, in some buildings, each person who enters is required to wear a tag to grasp the person in real time. Dynamic. Another example is in coal mine operations, tags can be set on miners or vehicles operating in the mine, so as to realize real-time monitoring of them, and timely forecast and auxiliary rescue in case of danger. For the target positioning system in this specific area, firstly, one or more electronic devices (hereinafter referred to as nodes) are arranged in the specific area to form a spatial coordinate network as a reference for locating the target. When the target object enters the spatial coordinate network, the posit...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a precise target positioning method and system based on the inaccurate target positioning method in a specific area in the prior art

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