Satellite navigation and positioning enhancement system and method based on dynamic compensation

Abstract

The invention relates to the field of satellite navigation, and discloses a satellite navigation and positioning enhancement system and a method based on dynamic compensation. The system comprises a reference unit capable of receiving external satellite signals, a satellite navigation enhancement device, and a transmitting antenna, which are connected in sequence. The system further comprises a dynamic compensation unit connected with the satellite navigation enhancement device. The satellite navigation enhancement device regenerates a dynamic satellite navigation and positioning enhancement signal in real time according to the time information, the constellation parameter information and the location and dynamic compensation information of a moving carrier provided by the reference unit and the dynamic compensation unit, and broadcasts the signal through the transmitting antenna. As the satellite navigation enhancement device regenerates a dynamic satellite navigation and positioning enhancement signal in real time, satellite navigation can be realized without any modification on the existing navigation terminal. A high-speed moving carrier can be positioned accurately in an environment without satellite navigation signals. The system and the method have important application value to emergency rescue for traffic accidents in tunnels, prevention of secondary accidents, and reduction of major accident risk.

Description

technical field [0001] The invention mainly relates to the field of satellite navigation, in particular to a dynamic compensation satellite navigation positioning enhancement system and method. Background technique [0002] In indoor environments such as tunnels, because satellite navigation signals are blocked, vehicles in tunnels cannot receive satellite navigation signals for positioning, and traffic accidents in tunnels are also more prominent. When the train enters, there will be a problem that it cannot be positioned normally, which will bring a lot of trouble to the locomotive positioning and dispatching command. Once the vehicle has abnormal operation such as emergency braking and does not completely stop at the pre-stop position, the subsequent train entering the tunnel Unable to accurately and intelligently judge, there is a serious potential safety hazard. [0003] At present, common solutions include pseudolite enhancement technology and navigation signal forwar...

AI Technical Summary

Problems solved by technology

When the train enters, there will be a problem that it cannot be positioned normally, which will bring a lot of trouble to the locomotive positioning and dispatching command. Once the vehicle has abnormal operation such as emergency braking and does not completely stop at the pre-stop position, the subsequent train entering the tunnel Unable to accurately and intelligently judge, there are serious safety hazards

[0003] At present, common solutions include pseudolite enhancement technology and navigation signal forwarding technology. Due to the need to use dedicated navigation terminals and the difficulty of project implementation, and satellite navigation signals are all static signals, such as figure 1 The schematic diagram of the indoor navigation signal in the prior art is shown. For example, transmitting antennas are arranged at equidistant positions of 100m to transmit satellite navigation signals, which cannot be matched with real-time vehicles in real time, resulting in sudden changes in satellite navigation signals, which cannot meet the needs of high-speed trains. Satellite navigation and positioning requirements in tunnels

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