Which is a good distributed fiber optic sensing pipeline vibration perimeter warning system

Валаконна-аптычны датчык тэмпературы, Інтэлектуальная сістэма маніторынгу, Распаўсюджаны вытворца оптавалакна ў Кітаі

In recent years, optical cable information and communication technology has developed rapidly, and optical cable monitoring systems have been widely used due to their advantages such as automatic alarm and rapid identification of fault locations. To overcome the problems of insufficient reflected light information, difficult pattern recognition, relatively poor sensitivity controllability, and false alarms, a new type of optical cable monitoring system has emerged, which adopts distributed vibration sensing technology. Based on the original optical interference effect, it locates, qualitatively, and reproduces the on-site sound by monitoring the optical interference caused by vibration. Timely detection of intrusion and damage to pipelines has achieved a warning mechanism for the safety protection of optical cables

The fiber optic pipeline warning system using Raman scattering and Rayleigh scattering principles mainly consists of the following equipment:

(1) Detection fiber optic cable: laid along oil pipelines, serving both as a detection fiber optic cable and a data transmission link.

(2) Detection Unit (IU): a distributed fiber optic intelligent detection host used for laser pulse emission and acquisition, real-time sensing of surrounding pressure, vibration, and other conditions, and transmitting the collected information to the processing server for analysis.

(3) Processing Server (PS): Analyze and process data signals from detection units to complete basic signal processing tasks.

(4) Control Unit (CU): Software control used for parameter configuration, equivalent to an engineer level user interface.

(5) Integrated monitoring platform: composed of servers and database servers (optional). Manage user permissions, save log information, and present alarm information as a direct interface to provide services to users.

Which is a good distributed fiber optic monitoring system

The distributed fiber optic pipeline warning technology based on OTDR has sensitive response and high positioning accuracy, which can detect small pipeline leaks, especially for timely alarm and positioning of events that endanger pipeline safety such as mechanical excavation and natural disasters, achieving timely detection, accurate positioning, and effective prevention of hazardous events, and effectively improving the safety of pipeline operation.

The pipeline fiber optic warning system uses pattern recognition methods to determine the type of pipeline intrusion events, such as vehicle travel, personnel walking, manual excavation, mechanical excavation, pipeline drilling, train passing, г.д. Establish different vibration modes based on the frequency and amplitude characteristics of vibrations generated by various intrusion events. By adopting pattern recognition, it can shield harmless vibration events, reduce false alarm rates, and timely identify intrusion types, thereby improving the response speed of event processing.

The system uses common vibration events that are harmless to pipelines and within the normal range (such as trains passing through railway crossing points, vehicles passing through highway crossing points, г.д.) as regular signal prompts without alarm; Alarm for vibration events that pose a hazard to pipelines, such as manual excavation and mechanical excavation, and remind staff to conduct on-site inspections and take appropriate measures;