Tunnel positioning method and device

A positioning method and technology of a positioning device, which are applied in the field of positioning and can solve the problems of inability to drive vehicle positioning, unable to receive satellite signals, etc.

Active Publication Date: 2016-03-16
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the vehicle is driving in the tunnel, the GPS satellite positioning system cannot receive satellite signals in the tunnel, and thus cannot normally locate the driving vehicle

Method used

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  • Tunnel positioning method and device
  • Tunnel positioning method and device

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Experimental program
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Effect test

Embodiment 1

[0021] figure 1 It is a flow chart of a tunnel positioning method provided by Embodiment 1 of the present invention. The method in this embodiment can be executed by a tunnel positioning device, which can be implemented by means of hardware and / or software, and generally can be integrated into a positioning server for providing positioning services, and used in conjunction with a positioning terminal that obtains positioning services . The positioning terminal may be a positioning device configured on a vehicle driven by the user, or a mobile device carried by the user, such as a mobile phone, a tablet computer, and a smart watch. The database of the positioning server stores the relevant information of each tunnel, including: the name of the tunnel, geographical location information, the length of the tunnel, the type of the tunnel, the distribution of lamps in the tunnel, and the air pressure at each location in the tunnel. The positioning terminal can communicate with the...

Embodiment 2

[0040] image 3 It is a flow chart of a tunnel positioning method provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above embodiments, and this method is suitable for positioning a vehicle driving in a tunnel when ambient brightness is used as the tunnel environment parameter. In this embodiment, the environmental parameters are specifically optimized as ambient brightness, and the measurement component that matches the ambient brightness is optimized as the front camera of the positioning terminal;

[0041] Correspondingly, according to the measured value of the environmental parameter, and the corresponding relationship between the environmental parameter value of the target tunnel and the location information of the target tunnel, the tunnel positioning of the positioning terminal is specifically optimized as follows: according to different According to the change law of the ambient brightness measurement value at the sampl...

Embodiment 3

[0064] Figure 5 It is a flowchart of a tunnel positioning method provided in Embodiment 3 of the present invention. This embodiment is optimized on the basis of the above embodiments, and this method is suitable for positioning a vehicle driving in a tunnel by using the air pressure as the environmental parameter of the tunnel. In this embodiment, the environmental parameter is optimized as air pressure, and the measuring component matched with the air pressure is optimized as: an air pressure sensor;

[0065] Correspondingly, according to the measured value of the environmental parameter, and the corresponding relationship between the environmental parameter value of the target tunnel and the location information of the target tunnel, the tunnel positioning of the positioning terminal is specifically optimized as follows: according to different The air pressure measurement value at the sampling moment and the corresponding relationship between the air pressure value of the ...

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Abstract

The embodiment of the invention discloses a tunnel positioning method and device. The method comprises the following steps: if a positioning terminal enters a target tunnel, acquiring an environmental parameter measured value of the positioning terminal; and performing tunnel positioning on the positioning terminal according to the environmental parameter measured value and a corresponding relationship between an environmental parameter value of the target tunnel and position information of the target tunnel. Running vehicles in a tunnel are positioned with environmental parameters in the tunnel, so that moving users in the tunnel are assisted in positioning.

Description

technical field [0001] The invention relates to positioning technology, in particular to a tunnel positioning method and device. Background technique [0002] Currently, the GPS (Global Position System, Global Satellite Positioning System) satellite positioning method is commonly used to locate driving vehicles, that is, the positioning terminal receives the position coordinates transmitted by at least 3 satellites among the 24 GPS satellites around the earth, and combines electronic map to determine the exact location of the vehicle on the electronic map. However, when the vehicle is driving in the tunnel, the GPS satellite positioning system cannot receive satellite signals in the tunnel, and thus cannot normally locate the driving vehicle. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a tunnel positioning method and device to achieve the purpose of helping a moving user in a tunnel to locate without deploying signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/02
CPCG01S5/0252H04W64/00
Inventor 张传明
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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