Indoor positioning method and system applied to nuclear power stations

Abstract

The invention provides an indoor positioning method and system applied to nuclear power stations. The method includes, obtaining the coordinates of multiple positioning base stations, and measuring the distance difference between a first distance from a positioning label to ith base stations in the multiple positioning base stations and a second distance from the positioning label to the first base station in the multiple positioning base stations; and calculating the coordinate of the positioning label by adopting a corresponding operation mode according to the number of the positioning basestations. The superposition of dual estimation location algorithms can be performed on a target by combining a CHAN's algorithm and Kalman filter; and the problem in the prior art of insufficient positioning precision caused by wireless signals affected by massive shielded screen cabinets existing in a nuclear power station, namely non-line-of-sight positioning factors, can be solved by establishing a ray tracing model which can accurately describe the propagation characteristics of a radio signal under an indoor environment.

Description

technical field [0001] The invention relates to the field of positioning technology, in particular to an indoor positioning method and system for nuclear power plants. Background technique [0002] Existing nuclear power plant positioning technology currently generally performs existential positioning, which cannot monitor and manage the action trajectory and status of on-site moving targets in real time, and the positioning accuracy error of ordinary positioning products is also relatively large (reaching the meter level). The main consideration is that the nuclear power system is based on the principle of safe and conservative design, and the electromagnetic interference between wireless equipment and various precision equipment on site will cause irreversible effects and it is difficult to diagnose the source of the accident. In addition, the environment of the plant is special, and the environment of some plants is relatively harsh. There will be certain difficulties in ...

AI Technical Summary

Problems solved by technology

This solution does not specifically describe whether the dynamic positioning effect can be satisfied, nor does it introduce the impact of the screen cabinet block on signal transmission and the solution

In addition, the use of the TOA algorithm does not mention the number of positioning nodes and the location of the factors that need to be located, which will also have a greater impact on the positioning accuracy, and the use of fuzzy logic algorithms cannot improve a certain positioning accuracy

In addition, the use of the TOA algorithm also requires strict synchronization of clock signals between positioning nodes and tags, which is difficult to implement

The overall proposal is not targeted enough

Images