O princípio de funcionamento dos detectores térmicos de incêndio de fibra óptica linear

What is linear fiber optic

Linear fiber optic transmission technology is a technology that uses single-mode optical cables to restore broadband RF signals as undistorted as possible at the remote end. Its principle is to use high-performance optical transmitters and receivers to achieve long-distance transmission of broadband RF signals through analog optical cables. Unlike typical digital fiber optic cable transmission, signals in the fiber optic cable are transmitted in analog form.

Fiber optic thermal fire detector

In the analysis of fire temperature in various engineering systems, the temperature measurement method, scattered and discontinuous temperature measurement points, temperature measurement distance, precisão de medição de temperatura, extração de sinais de temperatura, e análise de posicionamento de pontos de aquecimento são elos importantes. Os dispositivos tradicionais de medição de temperatura têm pontos fracos, como detecção ao vivo, precisão de baixa temperatura, posicionamento desfocado, taxa de resposta de baixa temperatura, curta distância efetiva de medição de temperatura, e construção difícil. Desenvolva um sistema de medição de temperatura de fibra óptica linear distribuída que atenda aos requisitos com base nos sinais reais de monitoramento de temperatura e incêndio de vários projetos de engenharia, combinado com tecnologia óptica e tecnologia de circuito eletrônico. Quanto mais contínuos forem os dados coletados pelos instrumentos de monitoramento da temperatura do incêndio em uma área efetiva, mais realistas e precisos serão os sinais reais coletados. This requires a device with strong computing power and high-speed data acquisition and processing. Through long-term monitoring and analysis of temperature, many information about fire temperature can be obtained. Portanto, whether long-term, contínuo, and accurate monitoring of fire temperature can be carried out largely determines the accuracy and timeliness of fire temperature warning and alarm.

Linear fiber optic temperature sensing fire detection system

A linear fiber optic temperature fire detector is a device used for real-time measurement of spatial temperature field distribution. Its main system equipment consists of temperature sensing optical cables, temperature calibration, aquisição de dados, processamento de dados, and graphic display. Using the same optical fiber as the sensing and conducting medium for temperature information, the temperature field information of the fiber is measured using the temperature effect of the backward Raman scattering spectrum of the optical fiber, and the measurement points are located using the optical time-domain reflection (OTDR) technology of the optical fiber. Due to its inherent safety, resistência à corrosão, resistência de alta tensão, resistência à interferência eletromagnética, and ability to quickly measure and locate multiple points, the device has a wide range of applications, such as temperature monitoring in petroleum engineering, usinas de energia, minas, túneis, e barragens. It plays an important role in the safe operation of equipment and the safety of personnel and property.

The linear fiber optic temperature sensing fire detection system, as a new type of temperature measurement technology product in fire temperature measurement systems, can be widely used in many public fire protection systems. The fiber optic temperature sensing fire detection system can monitor the temperature hazards generated by fires in power systems such as cable tunnels, cable trays, and cable intermediate heads of enterprises. It can also be used for fire detection in coal conveyor belts and storage yards. The insulation and explosion-proof properties of fiber optic can be used to monitor the high-voltage switchgear, transformadores, and other electrical equipment in coal mines in real time, eliminating potential accidents.
The linear fiber optic temperature sensing fire detection system, relying on its inherent safety and the timeliness of dynamic information, has gradually shown superiority in the safety fields of coal mine fire detection and early warning, significantly improving the level of mine production safety.

Working principle of linear fiber optic temperature sensing fire detection system

Based on the optical time-domain reflection (OTDR) of optical fibers and the temperature effect of Raman scattering in optical fibers. The detection fiber optic cable is laid in the space to be tested, and the fiber optic host emits a laser beam into the detection fiber optic cable and collects real-time Raman scattered light with on-site real-time temperature information scattered along the fiber optic cable. The fiber optic host analyzes and processes these optical signals to obtain temperature distribution information on the entire fiber optic cable. Compare the temperature information with the preset alarm parameter values. When the alarm conditions are met, o host de fibra óptica emite um som de alarme de incêndio e indicação de luz, e pode enviar informações de alarme para o controlador de alarme de incêndio.

Sensor de temperatura de fibra óptica, Sistema de monitoramento inteligente, Fabricante distribuído de fibra óptica na China