Unattended system for sensing railway field operation and protection based on photonic crystal fiber

Abstract

An unattended system for sensing railway field operation and protection based on a photonic crystal fiber is suitable for the fields of railway construction, optical fiber sensing and the like. The system is composed of a measurement module and a receiving module. The output end of a laser source (1) of the measurement module is connected with the input end of a phase modulator (2), the output end of the phase modulator (2) is connected with the input end of the photonic crystal fiber (3), a vibration signal is exerted on the photonic crystal fiber, the output end of the photonic crystal fiber (3) is connected with the input end of a photoelectric detector (4), the output end of the photoelectric detector (4) is connected with the input end of a signal processing module (5), the output end of the signal processing module (5) is connected with the input end of a wireless transmitting module (6), the output end of a wireless receiving module (7) of the receiving module is connected with the input end of a signal processing module (8), and the output end of the signal processing module (8) is connected with a display module (9) and a loudspeaker (10). According to the invention, the location of a coming vehicle can be accurately located by adopting the photonic crystal fiber sensing technology. The system has the advantages of low energy dependence, electromagnetic interference resistance, corrosion resistance and the like. Accidents caused by a fact that protection personnel cannot timely inform constructors of avoiding at mountain lines and curve districts with poor lookout conditions are avoided.

Description

technical field [0001] The invention relates to a photonic crystal optical fiber sensing unattended system for on-site operation protection of railways, which is applicable to the fields of railway construction, optical fiber sensing and the like. Background technique [0002] Railway construction is an important condition to ensure the normal operation of the railway. The construction process is usually carried out at the same time as the railway transportation. Therefore, it is of great practical significance to ensure the safety of railway construction. [0003] At present, the railway on-site operation protection and early warning system mainly has the following methods: operation scheduling, artificial lookout and satellite positioning technology. Railway transportation can be divided into the transportation passage period and the operation construction period in terms of time. For simple and concentrated construction, it can be arranged in the skylight; for cumbersome...

AI Technical Summary

Problems solved by technology

However, on-site protection equipment using satellite technology has disadvantages such as large volume and mass, inconvenient portability, poor usability, and inability to realize productization.

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