Unmanned watching system for railway on-site operation protection based on double-core optical fiber interferometer

Abstract

The invention discloses an unmanned watching system for railway on-site operation protection based on a double-core optical fiber interferometer, and is suitable for the fields of railway construction, optical fiber sensing and the like. The unmanned watching system consists of a measuring module and a receiving module, wherein the output end of a laser source (1) of the measuring 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 a double-core optical fiber interferometer (3); vibration signals are applied to the double-core optical fiber interferometer; the output end of the double-core optical fiber interferometer (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); the output end of the signal processing module (8) is connected with a display module (9) and a loudspeaker (10). Through the adoption of the double-core optical fiber interferometer, the unmanned watching system can accurately position an approaching train, and has the advantages of low energy dependence, electromagnetic interference resistance, corrosion resistance and the like; the unmanned watching system can avoid the phenomenon that at mountain regions and curve regions, which are poor in observation conditions, protection personnel cannot notice on-site construction personnel to avoid a train in time.

Description

technical field [0001] The invention relates to a double-core optical fiber interferometer unattended railway field operation protection system, which is suitable for railway construction, optical fiber sensing and other fields. 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 maintenance operat...

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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