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Engineering customers often do not know how to distinguish and identify the wiring of Vibration Optical Fiber. Below, our company Antongruida gives a brief introduction to the passive Vibration Optical Fiber system.
The Vibration Optical Fiber alarm system uses optical cable as the sensing unit, and the Vibration Optical Fiber host collects and analyzes the vibration signals of the front-end optical cable. Due to the characteristics of optical cable, the system can achieve detection over long distances and large-scale perimeter Zones, and each Zone can range from hundreds of meters to over one thousand meters.
In a passive Vibration Optical Fiber system, the vibration host is placed indoors, and no power or signal cables are required outdoors. There are two wiring methods for the passive Vibration Optical Fiber system:
1. One-cable wiring method 2. Separate wiring method
Regardless of the wiring method, the vibration host used is the same; the difference lies in the number and type of Zone separation packs and the number and type of optical cables.
1. One-cable wiring: the one-cable wiring method means that one optical cable is led out from the host, runs around the entire perimeter to the end of the Zone, and divides each Zone through a Zone separation pack. The whole system uses only one type of optical cable. The system determines the number of optical fiber cores and the number of Zone separation packs according to the number of Zones (in the case of single-direction optical cable routing: 4 Zones require 9-core optical fiber and 5 Zone separation packs; 8 Zones require 14-core optical fiber and 9 Zone separation packs; 16 Zones require 24-core optical fiber and 17 Zone separation packs). The advantage of this wiring method is simple wiring, with few Zone separation packs and optical cables; the disadvantage is many fusion splice points, making troubleshooting relatively more complicated than the separate wiring method.
Schematic diagram of one-cable wiring (four Zones):
2. Separate wiring: the separate wiring method means that one guiding optical cable is led out from the host to each Zone separation pack (note: not the terminal pack of the Zone), and then vibration optical cable is laid from the Zone separation pack to the terminal pack at the end of each Zone. The whole system requires two types of optical cable: guiding optical cable and vibration optical cable. The system determines the number of optical fiber cores and the number of Zone separation packs and terminal packs according to the number of Zones (in the case of single-direction optical cable routing: 4 Zones require one set of 6-core guiding optical fiber, 4 sets of 4-core vibration optical fiber, 2 Zone separation packs, and 4 Zone terminal packs; 8 Zones require one set of 12-core guiding optical fiber, 8 sets of 4-core vibration optical fiber, 4 Zone separation packs, and 8 Zone terminal packs; 16 Zones require one set of 24-core guiding optical fiber, 24 sets of 4-core vibration optical fiber, 8 Zone separation packs, and 16 Zone terminal packs). The advantage of this wiring method is relatively easier troubleshooting and fiber fusion; the disadvantage is that more optical cables and Zone separation packs are used, and the cost is significantly higher than the one-cable wiring.
Schematic diagram of separate wiring (four Zones):
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