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UWB-based TOF locating method

A positioning method and positioning label technology, applied in the field of Internet of Things, can solve the problem of increasing positioning error, and achieve the effect of small error, guaranteed accuracy, and reduced positioning error

Inactive Publication Date: 2018-01-09
RES INST OF SUN YAT SEN UNIV & SHENZHEN
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The distance-independent positioning scheme does not need to measure the absolute distance or orientation between nodes. It uses the network topology of nodes and the connectivity between nodes to realize node positioning, which reduces the requirements for node hardware, but the positioning error also increases accordingly.

Method used

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  • UWB-based TOF locating method

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Embodiment Construction

[0023] The concrete technical scheme of the present invention is described in conjunction with embodiment:

[0024] like figure 1 As shown, the UWB-based TOF positioning method, the dynamic positioning method, the steps are as follows:

[0025] (1) Set multiple UWB base stations in the area where the mobile terminal to be positioned is located, and the UWB base station is equipped with UWB sensors; TOF ranging sensors are installed on the UWB sensors;

[0026] There are three UWB base stations, namely the first UWB base station, the second UWB base station, and the third UWB base station, wherein the first UWB base station is used as a time source and the master base station, and the second UWB base station and the third UWB base station are used as slave base stations;

[0027] The mobile terminal to be positioned includes a UWB positioning tag; the signal of the UWB positioning tag in the area where the mobile terminal to be positioned is at least received by two UWB sensor...

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Abstract

The invention belongs to the technical field of the Internet of Things and provides a UWB-based TOF locating method. The method comprises the following steps: establishing a locating detection model in an upper computer according to a regional environment of a to-be-located mobile terminal and a distribution position of a UWB sensor; establishing a distance measurement model in the upper computeraccording to the arrangement position of a TOF ranging sensor; locating a UWB locating tag on the to-be-located mobile terminal via a TDOA algorithm, and displaying 3D coordinates and a real-time position of the region of the mobile terminal; (4) changing the position of a base station of the UWB sensor, measuring the distance by using the TOF ranging sensor, and marking the 3D coordinates of theUWB sensor again; and locating the to-be-located mobile terminal again. According to the UWB-based TOF locating method, by adoption of the advantages of the UWB technology, the distance is accuratelymeasured by using the TOF ranging, the response speed is high, the error is small, and the interference degree is small.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Things, in particular to a UWB-based TOF positioning method. Background technique [0002] The current target object positioning methods generally require the cooperation of nodes (anchor nodes) with known positions and network systems, and are classified according to whether they are based on distance measurement, including distance-based positioning schemes and distance-independent positioning schemes. The distance-based positioning scheme is to locate by measuring the actual distance or azimuth between adjacent nodes. The specific process is divided into three stages: the first stage is the ranging stage, the unknown node first measures the distance or angle to the adjacent node, and then further calculates the distance or azimuth to the adjacent beacon node; the second stage is the positioning stage, the unknown node After calculating the distance or angle to three or more beacon node...

Claims

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Application Information

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IPC IPC(8): H04B17/391H04W4/02H04W56/00G01S5/10
Inventor 刘海亮苏航李召国
Owner RES INST OF SUN YAT SEN UNIV & SHENZHEN
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