Navigation information simulation system for tunnel

A simulation system and navigation information technology, applied in the field of navigation, can solve the problems of time discontinuity, loss of positioning results, etc.

Pending Publication Date: 2019-05-31
HUNAN SATELLITE NAVIGATION INFORMATION TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a navigation signal simulation system for tunnels, which can realize continuous simulation of n

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  • Navigation information simulation system for tunnel
  • Navigation information simulation system for tunnel
  • Navigation information simulation system for tunnel

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0018] A schematic diagram of a layer structure according to an embodiment of the invention is shown in the drawing. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for clarity. The shapes of the various regions and layers shown in the figure, as well as their relative sizes and positional relationships are only exemplary, and may deviate due to manufacturing tolerances or techni...

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Abstract

The invention provides a navigation information simulation system for a tunnel. The system comprises at least one satellite signal simulator for generating an artificial navigation signal and transmitting the signal to a target train through a leaky cable, and an integrated control system which is used for sending a start simulation command, ephemeris information and real-time time to the at leastone satellite signal simulator through a fiber optic cable, wherein two adjacent satellite signal simulators are connected through a fiber optic cable group. The continuous simulation of navigation and positioning is carried out in the tunnel, and therefore, the problems of positioning result loss and time discontinuity of the train in the tunnel can be solved with low cost.

Description

technical field [0001] The present application relates to the technical field of navigation, in particular to a navigation information simulation system for tunnels. Background technique [0002] At present, there are many long tunnels along the railway line, and the navigation satellite signal is invisible inside the tunnel. After the train enters the tunnel, the receiver will lose the lock because it cannot receive the navigation satellite signal, that is, there is no positioning result and time information output. [0003] In related technologies, in order to prevent the receiver from losing lock, WiFi positioning or pseudolite positioning is usually used. However, the effects are not satisfactory. Among them, WiFi positioning cannot help the navigation receiver to locate, and multiple pseudolites need to be densely deployed, and are seriously affected by the near-far effect and multipath effect. Contents of the invention [0004] The purpose of the present invention i...

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Application Information

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IPC IPC(8): G01S19/08G01S19/25
Inventor 张勇虎
Owner HUNAN SATELLITE NAVIGATION INFORMATION TECH CO LTD
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