Optical fiber safety early-warning system

Abstract

The invention relates to an optical fiber safety alarm system with safety protection alarm for embedded tube, building, device and area, belonging to mechanical vibration measurement, impact measurement, and tube system technical field. The invention comprises an optical path system composed of a laser (101)and a sensor system (102), connected with a photoelectric signal processing circuit (105)via an optical fiber, wherein the sensor system (102)via an optical fiber is connected with a phase controller (103)and a polarization controller (104)to be connected with the photoelectric signal processing circuit (105)via an electric signal line, and a positioning system (106)connected with the circuit (105)is connected with a signal recognize system (107)and a local management system (110), theoutput of the signal recognize system is connected with the local management system (110)which output is connected with an alarm output system (108)and an integral management platform (112), and the alarm output system (108)sends out the alarm information.

Description

technical field [0001] The present invention is an optical fiber safety early warning system for safety protection and early warning of buried pipelines, structures or communication optical cables, transportation facilities, cultural relics protection areas, arsenals, key institutions, important industrial factory areas and other structures, important facilities and areas. It involves the measurement of mechanical vibration, the measurement of impact and the technical field of piping system. Background technique [0002] For substances such as oil, natural gas, refined oil, coal slurry and water, pipeline transportation is a safe, economical and efficient transportation method, and it is playing an increasingly important role in the global transportation industry, especially in petroleum, finished products Oil and natural gas play an extremely important role in the transportation of flammable and explosive energy substances with high transaction value. In our country, at lea...

AI Technical Summary

Problems solved by technology

Distributed optical fiber temperature and stress monitoring technology is to use the nonlinear characteristics of optical fiber (Raman effect and Brillouin effect) to collect in real time the temperature influence and impact stress of the medium leaking in the pipeline on the optical fiber to determine the location of the leakage point. This technology is affected by optical cable The structure and the distance between the optical cable and the leakage point affect the monitoring effect

Second, the preventive monitoring technology before the pipeline damage event occurs, that is, the pipeline damage early warning technology. The existing technology of this type is mainly "sonic technology monitoring", which uses the principle of sound wave transmission along the pipeline. Install an active sensor on the left and right, pick up the sound signal along the pipeline and analyze it, determine the nature of the event, and then detect the event that damages the pipeline in advance, but each sensor must be equipped with a power supply device and communication device, which not only increases equipment investment and Maintenance costs, and the facilities themselves are vulnerable to damage, rendering the unit non-functional

[0006] However, there is no effective way to protect the safety of other important facilities and areas such as underground structures or communication cables, transportation facilities, cultural relics protection areas, armories, key institutions and important industrial factories.

[0007] Aiming at the problems existing in the existing safety monitoring technology of pipelines and similar facilities, an Australian patent proposes a monitoring technology based on the principle of Mach-Zehnder (Mach-Zehnder) fiber optic interferometer. certain defects

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