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Terminal positioning method and system

A terminal positioning and terminal technology, applied in the field of positioning, can solve problems such as positioning system positioning failure

Active Publication Date: 2016-08-24
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, what the present invention is to solve is the technical problem that existing positioning systems are prone to positioning failures. In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

Method used

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  • Terminal positioning method and system
  • Terminal positioning method and system

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Experimental program
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Embodiment 1

[0072] A method for locating a terminal is used for locating a terminal. At present, with the needs of waterway cargo transportation and naval strategy, the volume and scale of cargo ships and warships in various countries are getting larger and larger, and the space and layout of their internal cabins are becoming more and more complicated. In order to realize the safety inspection of the operators in the cabin to ensure the safety of the operators in the cabin, it is first necessary to realize the positioning of the operators in the cabin. When locating, the terminal can be worn on the operator who enters the cabin, and more than two routers are placed in each cabin; the terminal sends out a signal, and communicates with the host computer through the router. The terminal performs positioning, and then locates the position of the operator in the cabin.

[0073] Such as figure 1 As shown, the terminal positioning method provided by the present invention includes the followin...

Embodiment 2

[0096] see Figure 4 As shown, this embodiment provides a terminal positioning system, including: a terminal, the terminal sends a signal with preset power; at least two routers, the router receives the signal sent by the terminal, and sends the received signal Said signal and its own uniquely corresponding identification code (such as its own MAC address, etc.) are packaged and sent to the host computer; the host computer further includes: a router selection module, which is used to select two routers according to the size of the signal strength received by the router. A router with the highest signal strength and the same height as the terminal is used as the first router and the second router; the measurement distance calculation module is used to measure distance by RSSI according to the power of the signal received by the first router and the second router. An algorithm to calculate a first measurement distance between the first router and the terminal, and a second measu...

Embodiment 3

[0112] This embodiment provides a host computer for terminal positioning, which can be used in the terminal positioning system in Embodiment 2 above, such as Figure 8 As shown, it includes: a router selection module, which is used to select two routers with the highest signal strength and the same height as the terminal as the first router and the second router according to the size of the signal strength received by the router from the terminal; the measurement distance calculation module, It is used to calculate the first measurement distance between the first router and the terminal through the RSSI ranging algorithm according to the power of the signal received by the first router and the second router, and calculate the first measurement distance between the second router and the terminal. Two measurement distances; a candidate coordinate calculation module, used to determine the candidate coordinates of the terminal according to the first measurement distance, the second...

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Abstract

The invention provides a terminal positioning method and system. As the heights of a first selected router and a second selected router are equal to the height of a terminal, the spatial three-dimensional coordinates are simplified into two-dimensional planar coordinates, and the algorithm is made easy. An upper computer works out a first measurement distance and a second measurement distance through an RSSI distance measurement algorithm and determines the to-be-selected coordinates of the terminal in combination with the coordinates of the first router and the coordinates of the second router, and the final coordinates are determined according to the to-be-selected coordinates of the terminal. The final coordinates of the terminal are calculated through the algorithm, the algorithm is simple, the phenomenon that positioning fails is avoided, the positioning result is the coordinates of one point, and accuracy is high. Meanwhile, the process of selecting the first router and the second router is executed by the upper computer, the complexity of the terminal is lowered, the energy consumption of the terminal is reduced, and the continuous working time of the terminal positioning system is prolonged.

Description

technical field [0001] 本发明涉及定位技术,具体涉及一种终端定位方法和系统。 Background technique [0002] 随着无线通信技术的发展,越来越多的场合都需要定位技术。目前,常见的定位技术有:GPS定位技术、红外线定位技术、RFID定位技术、超声波定位技术以及ZigBee定位技术等。 [0003] 中国专利文献CN104080053A公开了一种基于ZigBee技术的人体摔倒检测定位系统,该定位系统包括:若干移动标签节点、多个路由器节点、协调器节点和远程监护平台,其中,移动标签节点收集其与周围通信的路由器节点之间的RSSI值,并且对收集到的RSSI值进行排序,选择其中最大的三个值以及三个最大值的路由器节点的ID作为定位信息发送至最近的路由器节点;各路由器节点设置在使用环境中的固定位置,分别与移动标签节点和协调器节点连接,用于将接收到的定位信息发送至协调器节点;协调器节点分别与各路由器节点和远程监护平台连接,用于发起ZigBee网络、设定参数,并将接收到的定位信息发送至远程监护平台;远程监护平台用于接收定位信息,并根据定位信息计算出该移动标签节点在环境中的具体位置。远程监护平台对移动标签节点进行定位时采用三边定位算法,即:利用三个以及三个以上已知点与未知点之间的距离来计算未知点的二维坐标,设三个坐标节点到未知节点的半径R1、R2、R3,则这三个半径的交点就是未知节点的位置坐标,半径可以根据未知节点与参考节点之间的RSSI值计算得出。上述专利文献公开的基于ZigBee技术的人体摔倒检测定位系统,移动标签节点需要收集与周围通信的路由器节点之间的RSSI值,并进行排序,这增加了移动标签节点的复杂度,增大了移动节点标签的能耗,不利于延长系统可持续工作的时间;同时,由于ZigBee信号在传输过程中不可避免的存在信号衰弱,未知节点到三个坐标节点的半径存在误差,且无法保证三个半径一定能够交到某一个固定的点上,如三个半径无交点,则会导致定位失败。 Contents of the invention [0004] 为此,本发明所要解决的是现有定位系统容易出现定位失败的技术问题,为解决上述技术问题,本发明采用的技术方案如下: [0005] 一种终端定位方法,包括如下步骤: [0006] 终端发出预设...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06H04W4/04H04W64/00
CPCG01S5/06
Inventor 李言胜马瑞宁南西廖虎孙琳
Owner QINGDAO TECHNOLOGICAL UNIVERSITY