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A vehicle-road cooperation-based tracking and positioning system and a tracking and positioning method for vehicles in a tunnel

A vehicle-road coordination, tracking and positioning technology, which is applied to services based on location information, services based on specific environments, vehicle components, etc., can solve the problems of inaccurate vehicle tracking and positioning and high construction costs, and achieve high positioning accuracy and application range. wide effect

Inactive Publication Date: 2019-06-07
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a vehicle tracking and positioning system and a tracking and positioning method based on vehicle-road coordination technology that can realize high-precision positioning and tracking of moving vehicles in tunnels, so as to solve the problem of vehicle tracking caused by tunnel shielding in the above-mentioned background technology Technical problems of imprecise positioning and high construction costs based on supporting base stations

Method used

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  • A vehicle-road cooperation-based tracking and positioning system and a tracking and positioning method for vehicles in a tunnel
  • A vehicle-road cooperation-based tracking and positioning system and a tracking and positioning method for vehicles in a tunnel
  • A vehicle-road cooperation-based tracking and positioning system and a tracking and positioning method for vehicles in a tunnel

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Embodiment 1

[0042] Such as figure 1 As shown, Embodiment 1 of the present invention provides a vehicle tracking and positioning system in a tunnel based on vehicle-road coordination, the system includes:

[0043] Roadside nodes, there are multiple roadside nodes, used to receive the field strength RSSI of the signal transmitted by the vehicle-mounted unit, and send the field strength RSSI to the distance calculation unit;

[0044] Roadside node central control unit, used for unified management of roadside nodes, including distance calculation unit and positioning unit;

[0045]The distance calculation unit is used to establish an RSSI-D model to calculate the distance between the roadside node and the vehicle according to the field intensity RSSI, and send the distance between the roadside node and the vehicle to the positioning unit;

[0046] The positioning unit is used to calculate the position of the vehicle according to the distance between the roadside node and the vehicle in combi...

Embodiment 2

[0051] Such as figure 2 As shown, Embodiment 2 of the present invention provides a method for tracking and locating vehicles in a tunnel using the system described in Embodiment 1. The method includes the following process steps:

[0052] Step S110: the roadside node obtains the field strength RSSI sent by the vehicle unit, and sends the field strength RSSI to the distance calculation unit;

[0053] Step S120: the distance calculation unit establishes an RSSI-D model to calculate the distance between the roadside node and the vehicle according to the field strength RSSI, and sends the distance between the roadside node and the vehicle to the positioning unit;

[0054] Step S130: The positioning unit calculates the position of the vehicle according to the distance between the roadside node and the vehicle combined with the weighted centroid algorithm.

[0055] Further, the step S110 specifically includes:

[0056] Multiple roadside nodes are arranged in a zigzag shape on bot...

Embodiment 3

[0066] Such as image 3 As shown, Embodiment 3 of the present invention provides a vehicle-road coordination-based vehicle tracking and positioning method in a tunnel, the method including: S101: arrange roadside nodes on both sides of the road, and conduct unified management by the roadside central control unit; S102 : The roadside node receives the field strength (RSSI) of the signal transmitted by the vehicle unit and sends it to the roadside central control unit; S103: The roadside central control unit calculates the roadside node by the RSSI-D model according to the field strength of the received signal Distance to the vehicle; S104: Select the four smallest points from the multiple distance values ​​obtained above to perform weighted centroid algorithm positioning, and calculate the position of the vehicle; S105: The roadside central control unit uploads the obtained vehicle position to the remote service center , displayed on the visual interface.

[0067] In the speci...

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Abstract

The invention discloses a vehicle-road cooperation-based tracking and positioning system and a tracking and positioning method for vehicles in a tunnel, and relates to the technical field of vehicle tracking and positioning in the tunnel. The roadside node obtains the field intensity RSSI sent by the vehicle-mounted unit and sends the field intensity RSSI to the distance calculation unit; The distance calculation unit establishes an RSSI-D model according to the field intensity RSSI,calculates the distance between the road side node and the vehicle, and sends the distance between the road sidenode and the vehicle to the positioning unit; And the positioning unit calculates the position of the vehicle by combining a weighted centroid algorithm according to the distance between the roadsidenode and the vehicle. A spread spectrum communication technology is adopted as a positioning means, compared with a traditional wireless positioning scheme, the position of a vehicle in a tunnel canbe monitored in real time, and long-distance positioning and multi-target simultaneous positioning can be achieved; Accurate sensing of vehicle positions in weak signal areas such as a tunnel is achieved, the method is applied to the fields of intelligent traffic and automatic driving, the problem that accurate positioning cannot be achieved in the tunnel is solved, positioning precision is high,and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of vehicle tracking and positioning in tunnels, in particular to a vehicle tracking and positioning system and a tracking and positioning method in tunnels based on vehicle-road coordination. Background technique [0002] In recent years, the construction of high-speed and large passages in my country has developed rapidly, and many relatively large and complex tunnels have emerged, such as Fuzhou Xiangshan Tunnel, Qinling Zhongnanshan Tunnel, Chongqing-Chengdu Expressway Zhongliangshan, Jinyunshan Tunnel, Shanxi Yanmenguan Tunnel, etc. These tunnels have the characteristics of complex geographical environment, closed and narrow space, and long longitudinal distance. The outer shell of long tunnels is generally composed of mountain rock walls or reinforced concrete, which has a very serious shielding effect on signals. Traditional GPS and Beidou positioning systems cannot Penetrate the outer shell of the tun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/021H04W4/029H04W4/40H04B1/69
Inventor 蔡国强王要飞贾利民王彩凤郝强潘越赵佳庆郭杉梁柯欣李一鸣
Owner BEIJING JIAOTONG UNIV
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