Complete guide on how to use temperature sensing optical fibers to monitor temperature in bus ducts by 2025-INNO

Fiber optic laying method para sa bus duct
1. Pagsukat ng temperatura ng mga optical fibers ay hindi lamang tagapagdala ng mga signal, kundi pati na rin ang mga sensor ng temperatura. Ang kalidad ng pag-install ay direktang nakakaapekto sa katumpakan ng pagsukat, kaya ang espesyal na pansin ay dapat bayaran sa proseso ng pag-install sa panahon ng konstruksiyon.
Ang pagtatayo ng temperature sensing optical fibers sa mga bus duct ay pangunahing umaasa sa direktang pagtula. Kapag kailangan ang mas tumpak na mga punto ng pagsukat ng temperatura, maaaring isagawa ang paikot-ikot na pagtula (tulad ng mga posisyon ng bus node)

Temperature sensing fiber

Ang temperatura sensing fiber pinagtibay ang nakapirming paraan ng ibabaw na naka-mount na hibla. Ang pagtula ng temperatura sensing optical fibers ay naayos na may fiber optic fasteners (insulated zip ties) upang mahigpit na i-bonding ang temperature sensing optical fibers sa panlabas na ibabaw ng bus duct.

1) Ang asul na linya ay kumakatawan sa temperatura sensing fiber;

2) The red color represents the bus duct
Fiber optic is a quartz product, and when it needs to be bent and laid, it can only be achieved with a circular arc with a diameter greater than 3 cm, otherwise it will cause fiber optic loss and affect measurement accuracy. Kasabay nito, in the processing of fiber optic connectors, it is necessary to maintain the cleanliness of the fiber fusion surface to ensure measurement accuracy.
2. Fiber optic laying method for busbar joints
Binding of busbar joints:
(1) Adopting the double loop folding laying method, the cable is laid back and forth three times along the longitudinal direction of the busbar joint, with each round trip at a different side position, and the surface distance between the optical cables is not less than 10 centimeters;
(2) Use nylon zip ties to tie the temperature sensing optical fiber to the busbar joint, with a binding spacing of no more than 50 centimeters. The fiber should be tied at both the beginning and end of the cable loop, ensuring that the temperature sensing optical fiber has a large bending radius during binding;
(3) When installing the temperature sensing fiber at the busbar joint, a double loop winding method is used to fix it at the busbar joint, ensuring that the temperature sensing fiber is in close contact with the busbar terminal or busbar joint. The unfolded length of the dual ring optical cable shall not be less than 5 metro (determined according to the actual size of the busbar joint).
3. Setting of temperature sensing fiber margin
Temperature sensing fiber margin, also known as fiber ring, is mainly used as a measure for positioning fiber optic temperature measurement systems, measuring ambient temperature, and preventing fiber optic damage during the installation of temperature sensing fibers. The setting scenario is as follows:
(1) It is recommended to install a fiber optic cable allowance section every 500 meters for temperature sensing optical fibers;
(2) A fiber optic cable allowance section should be installed when the temperature sensing fiber passes through different areas (tulad ng mga bus joints);
(3) When measuring the ambient temperature, it can be achieved by setting the fiber optic cable allowance section;
(4) At the end of the temperature sensing fiber optic cable, a cable allowance section should be set up to achieve terminal explicit positioning, and waterproof treatment should be carried out at the end;
(5) Sa simula ng temperatura sensing fiber optic cable, isang seksyon ng allowance ng cable ay dapat na i-set up upang makamit ang tahasang pagpoposisyon sa simula;
Pagtatakda ng mga puntos:
(1) Ang haba ng natitirang seksyon ay 10-15 metro;
(2) Gamitin 3-4 nylon zip ties upang itali ang natitirang seksyon sa isang pabilog na hugis;
(3) Ligtas na ayusin at tiyaking ang optical cable sa pasukan at labasan ng singsing ay may malaking baluktot na radius;
5.3.4 Fusion splicing ng mga optical cable
Ang mga operasyon ng pagsasanib ng fiber optic cable ay kinakailangan sa sumusunod na tatlong mga sitwasyon:
(1) Pag-splicing sa pagitan ng iba't ibang fiber optic cable reels;
(2) Sa breakpoint ng optical cable;
(3) Sa punto ng makabuluhang pagkawala ng fiber optic cable;
Mga hakbang sa hinang:
(1) Alisan ng balat ang temperature sensing fiber na may haba na humigit-kumulang 50cm;
(2) Peel off a portion of the fixed temperature sensing fiber into the splice box;
(3) Clean the temperature measuring optical fiber;
(4) Wear heat shrink tubing to complete fiber splitting and matching for multi fiber optical cables;
(5) Produce fiber optic end faces and fuse them together;
(6) Fiber optic fixation inside the tray;
(7) Seal the fiber optic cable joint box and securely fix it at a high position;
5. Fixing of optical cable splice box
Fixed points:
(1) The fiber optic cable joint box should be fixed with screws;
(2) The temperature sensing fiber should have a large bending radius at the inlet and outlet of the junction box;
(3) For damp laying environments, the fiber optic cable joint box should be sealed;
(4) The joint box should be fixed in a place that is not easily accessible to workers;