Rail vehicle positioning and speed detecting system based on phi-OTDR

Abstract

The invention discloses a rail vehicle positioning and speed detecting system based on a phi-OTDR. The rail vehicle positioning and speed detecting system based on the phi-OTDR comprises a phi-OTDR system main engine and an optical cable. The phi-OTDR system main engine is connected with the optical cable and is used for sending a pulsed optical signal, injecting the pulsed light signal into the optical cable, handling the Rayleigh scattering coherent light reflected back from the optical cable, and acquiring real time position information and speed information of train operation. The rail vehicle positioning and speed detecting system based on the phi-OTDR has the advantages that 1, the phi-OTDR is passive in the whole process, and free of influences of the electromagnetic field, and guarantees normal work in harsh environments such as thunder and lightning and the like; 2, due to the fact that the phi-OTDR is fully distributed, the monitoring distance can reach more than 100 km, the spatial resolution can reach the meter level, so that a train command and dispatching center can directly acquire the real time position information and speed information of a train through the phi-OTDR system main engine.

Description

technical field [0001] The invention relates to the technical field of rail train speed measurement, in particular to a rail vehicle positioning and speed measurement system based on Φ-OTDR. Background technique [0002] In the rail train traffic safety guarantee system, the real-time position and speed information of the train operation is the information that the train dispatching command system must accurately grasp. Drive safely. At present, domestic railways obtain real-time speed and position information of trains through the Communication Based Train Control System (CBTC) based on track circuits. In this system, the track circuit can be used to automatically detect the position of the train and vehicle, and control the display of the signal machine; the ground signal can be transmitted to the locomotive through the track circuit, so that the train operation can be controlled. Although many protective measures have been taken for the track circuit, the track circuit ...

AI Technical Summary

Problems solved by technology

Although the track circuit has taken a number of protective measures, the track circuit may still fail in severe weather such as thunder and lightning, resulting in serious traffic accidents

The biggest disadvantage of the track circuit is that its work is active, and in the case of unfavorable maintenance, it will lead to major traffic accidents

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