1. product introduction
The system uses photoelectric technology, communication technology, microprocessor technology, digital vibration sensing technology and independent design of low temperature, strong electric field, wet environment operation technology. It can monitor the cable line profile in real time, can find the cable environment profile as soon as possible, prevent the cable from being damaged by external force, and reduce the loss. At the same time, it can also provide a large number of online monitoring data, providing a reliable basis for operators to understand the operation of the cable.
Technical characteristics and advantages of 2. system
For the electrical production of a full range of SWGZ optical fiber vibration monitoring system, the sensing system has a very obvious superiority, each series of indicators are to achieve the industry advanced level:
Measurement distance: SWGZ detection distance up to 40km, and can accurately locate the intrusion point.
Continuous distributed measurement: It can realize multi-point and multi-event monitoring at the same time without affecting each other.
High sensitivity and high precision: The system parameters can be configured according to the environment, and the standard communication optical cable can be directly used, and the monitoring area is divided according to the site.
Rich pattern recognition: background pattern recognition, through pattern analysis to accurately determine the intrusion event.
Stability: All products from the factory will undergo multiple rounds of high and low temperature, alternating hot and humid environment tests to confirm their adaptation to various harsh environments.
Electromagnetic insulation: free from electromagnetic interference, essential lightning protection: the material of the optical fiber used in SWGZ is quartz, with good insulation performance and is not affected by lightning; the frequency band of the laser pulse transmitted in the optical fiber is much higher than the frequency band of the electromagnetic field and is not affected by electromagnetic interference, so it is not affected even if it works in a strong electromagnetic field environment.
Safety: The optical fiber used in SWGZ does not produce electric sparks. The average power of the laser pulse transmitted in the optical fiber is very low. Even if the optical fiber is broken, there will be no danger.
Simple construction, easy maintenance: SWGZ use of armored fiber, has a good compressive tensile strength, construction is convenient and simple, in the use of the process is difficult to have problems, even if there is damage, the staff can resume work after re-welding.
Highly intelligent, easy to achieve unattended: SWGZ series can send reports to the direct person in charge via SMS and Internet when an abnormality is detected. Open design, easy data management and field control.
3. Programme Objectives
A set of optical fiber vibration monitoring and alarm system is added for underground cable damage prevention, and the monitoring system such as sound and light is linked to provide real-time, no blind area, anti-interference, high sensitivity and low false alarm security monitoring solutions for cables.
Monitoring behavior: Through real-time online distributed monitoring of cables, it can locate and alarm behaviors such as excavation and man-made damage around cables.
To achieve insulation on-line monitoring: distributed optical fiber is insulated and pressure-resistant material packaging, and the overall system is based on optical fiber signal acquisition and transmission system, all-optical monitoring, measurement site to achieve passive monitoring;
To achieve unmanned monitoring: distributed optical fiber vibration online monitoring system to implement 365 days 24 hours a day uninterrupted monitoring, is conducive to greatly reduce labor costs and human error factors;
4. scheme design
The embedded cable anti-external force intrusion monitoring system developed for the electrical system uses an optical fiber vibration monitoring system, which is like installing a pair of "monitoring eyes" on the cable, realizing all-weather and distributed monitoring of early detection and early warning of the sub-health state of the cable. Optical fiber vibration monitoring alarm system is not affected by wind and rain, not affected by lightning and humidity, accurate positioning, accuracy within 10m and so on. The distributed optical fiber vibration sensing monitoring of buried cables, and analysis and processing, can realize the discovery of buried cable infringement events early warning and detection analysis.