터널 프로젝트 화재 경보 시스템 선형 광섬유 온도 감지 화재 감지 경보

대부분의 고속도로 터널 화재 경보 시스템은 케이블형 온도 센서로 설계되었습니다., 터널의 환경 요구사항에 따라 광신호를 전송하는 케이블형 온도 센서를 선택합니다.. 광신호용 케이블형 온도 센서는 다른 유형의 케이블형 온도 센서에 비해 상당한 장점이 있다는 것이 실무를 통해 입증되었습니다., 온도 감지 케이블 등, 전자기 간섭 측면에서, 신호 전송 거리, 내식성, 오경보, 오경보 등의 신뢰성 및 신뢰성. 현재, 엔지니어링에서 일반적으로 사용되는 두 가지 케이블 유형 온도 센서는 광섬유 격자와 온도 감지 섬유입니다..
터널 한쪽 끝의 변전소에서 이중 채널을 사용하십시오., with a 분산 광섬유 채널당 4km의 감지 호스트, corresponding to a temperature sensing fiber optic with a detection distance of 4km, and a fiber optic terminal box at the endpoint; Use dual channels in the substation at the other end of the tunnel, with a distributed fiber optic detection host of 2KM per channel, corresponding to a temperature sensing fiber optic with a detection distance of 600m. The endpoint position is consistent with the 4km temperature sensing fiber optic from the opposite end, and connected to the fiber optic terminal box.
Both distributed fiber optic detection hosts are connected to corresponding fire alarm control devices. The two fire alarm controllers can be connected to the local upper computer or uploaded to the central control mechanism, or connected to one of the fire alarm controllers using a data optical transceiver and configured with software to achieve secondary control. The latter is commonly used in engineering to improve system integration. If the capacity of the fire alarm controller is sufficient, it is also possible to directly connect the remote distributed fiber optic detection host with the fire alarm controller using an optical transceiver, thereby saving one fire alarm controller.
If a tunnel substation is only set up at one end of the tunnel, another set of distributed fiber optic detection host and fire alarm controller can be placed in the equipment cabinet inside the tunnel.
This diagram is also applicable to tunnel fire detection with a detection distance of 4km to 8km. The length of the temperature sensing fiber and the detection distance of each channel of the distributed fiber detection host are selected according to actual needs
If dual channels are selected, distributed fiber optic detection hosts with a length of 5km or more per channel are used.
Differences. As the detection distance increases, the structure of temperature sensing fiber optic detection systems tends to become more complex. If only a tunnel substation is set up at the end of the tunnel, corresponding equipment needs to be placed inside the tunnel.

The linear fiber optic temperature fire detection alarm adopts dual channels, ~와 함께 3 distributed fiber optic detection hosts located at 4km per channel. At the tunnel end substation, 그만큼 distributed fiber optic detection host is connected to a temperature sensing fiber optic cable with a detection distance of 4km to two holes. The end point is connected to a fiber optic terminal box, and the temperature sensing fiber optic cable is led out from the distributed fiber optic detection host in each hole of the substation as shown in Figure 5. One end is aligned with the end point of the temperature sensing fiber optic cable from the tunnel end, and the other end is connected to the hole. The end point is connected to the fiber optic terminal box.
The distributed fiber optic detection host is connected to the corresponding fire alarm controller, and a network of fire alarm controllers is constructed. The data optical terminal is connected in pairs and software settings are made, so that all three fire alarm controllers can display the fire alarm situation of the entire tunnel.
If a tunnel substation is only set up at one end of the tunnel, the other two sets of distributed fiber optic detection hosts and fire alarm controllers can be placed in the equipment cabinet inside the tunnel.
If a dual channel distributed fiber optic detection host with a distance of 6km or more per channel is selected, and the differential detection distance increases to 8km or more, the structure of the temperature sensing fiber optic detection system is complex, and the equipment placement is scattered.

광섬유 온도 센서, 지능형 모니터링 시스템, 중국의 분산광섬유 제조업체