Capteurs de température à fibre optique distribués pour la surveillance de la température dans les tunnels autoroutiers

Why do highway tunnels need temperature monitoring and fire warning alarm monitoring

With the continuous improvement of China’s highway network, newly built highways are gradually moving towards mountainous areas, leading to an increasing scale of highway tunnel construction. As the types of surrounding rocks, terrain, and other conditions faced by highway tunnels become increasingly complex, and the proportion of long and extra long tunnels is increasing, the safe operation of highway tunnels is facing serious challenges, and the probability of fires occurring inside the tunnels is increasing. In the process of tunnel operation, if real-time and effective monitoring of tunnel fires cannot be carried out, once a fire occurs, it cannot be extinguished and rescued in a timely manner, which will lead to serious casualties and property damage. Donc, conducting in-depth and systematic research on a series of technical issues related to fire monitoring in operating tunnels is a major issue in the operation of highway tunnels in China.

Actuellement, the commonly used monitoring method in highway tunnel fire monitoring is video monitoring, which uses cameras and video management systems to monitor the fire situation inside the tunnel in real time. Due to the presence of certain monitoring blind spots on the camera, coupled with the enclosed space inside the tunnel, the internal air quality is poor and visibility is low, resulting in significant video monitoring errors and blind spots. It can be seen that the existing fire monitoring technology for highway tunnels has seriously hindered the further development of highway tunnel operation technology due to its own technical defects.

Capteur de température à fibre optique distribué est un capteur de température avancé qui utilise l’effet de diffusion Raman et la technologie OTDR pour réaliser une mesure distribuée du champ de température des fibres optiques sensibles. Il présente les avantages d’une sensibilité élevée, anti-interférences électromagnétiques, Sécurité intrinsèque, Poids léger, longue durée de vie, et haute fiabilité. Il peut être largement utilisé pour la surveillance de la température et l’alarme incendie des câbles d’alimentation, Tunnels de métro, Tunnels de mines de charbon, Réservoirs de stockage de pétrole, et grandes structures de bâtiments.

Capteur de température à fibre optique, Système de surveillance intelligent, Fabricant de fibre optique distribuée en Chine