A set of high-precision fire prevention system based on thermography application is established inside and outside the wooden cultural relics and ancient buildings, which can realize the prevention of cultural relics fire. The thermal imaging fire protection system can quickly and accurately find the fire point and nip the fire in the bud. The thermal imaging technology can be used to monitor the temperature abnormality in the internal space of wooden cultural relics, so as to find the fire more quickly, forecast the fire more accurately, and deal with the fire more efficiently, achieving scientific fire prevention and minimizing losses. Installing thermal imaging systems in wooden ancient buildings or inside and outside the museum can comprehensively monitor the normal working temperature and fire point temperature of the fireproof area. A value between the fire point temperature and the normal temperature is taken as the alarm threshold of the thermal imaging system to monitor. As long as the temperature in the area exceeds the threshold, the thermal imaging system will send an alarm signal to the software platform, and the software platform will simultaneously notify the staff on duty of the alarm information so that the managers can deal with the fire hazards as soon as possible. The platform can also send to other staff's mobile phones synchronously by linking voices (calls), images, text messages, WeChat, emails, etc.
The main advantages of the thermal imaging technology in the fire protection of wooden cultural relics are as below:
Advantage 1: It can be fast in finding fire.
In seconds, it is very important for fire prevention on wooden cultural relics. We know that due to the relatively long time of completion of ancient wooden buildings, the interior of the building is relatively dry, and the fire resistance level is very low. This is also the weakness of traditional wooden ancient buildings. Fires in wooden ancient buildings are the same as fires in other buildings. The source of the initial fire is very important, which is measured in seconds. In the initial stage of the fire, the main characteristics are large initial smoke, small burning area of combustible materials and flame. The flame is not high, radiant heat is not strong, and the fire develops slowly. This stage is the best time to put out the fire. If the manager finds it early, the source of the fire can be extinguished immediately with a fire extinguisher or a bucket of water, which can completely avoid greater losses.
Advantage 2: The penetrability is particularly strong.
It can be imaged under all-weather conditions with the ability to penetrate fog, rain, and snow. The atmosphere, clouds, fog, and dust will absorb visible light and near-infrared rays. However, the thermal infrared rays of 3 to 5 microns (mid-wave infrared region) and 8 to 14 microns (long-wave infrared region) are transparent. These two bands are called "atmospheric window" of thermal infrared rays. Using these two windows, people can clearly observe the situation ahead in a completely dark night or in a smoke-filled fire field. It is difficult for traditional monitoring equipment to capture clear images in a dense cloud and fog environment, but the infrared thermal imaging technology can effectively penetrate the atmosphere, clouds and fog to capture clear images. When a fire occurs in a wooden building and the building is filled with smoke, firefighters cannot see the scene clearly. The thermal imaging technology can accurately find the source of the fire, which is of great significance for accurate fire fighting and rescue on the scene.
Advantage 3: It can be adapted to any lighting environment.
Traditional monitoring equipment relies on natural or ambient light for imaging, while the infrared thermal imaging technology does not require any light, and can clearly capture images by relying on the infrared heat radiated by the object itself, and clearly display the target with a high-contrast thermal image. It is suitable for working in any lighting environment, not affected by strong light, and it can clearly detect and find targets regardless of day and night, identify camouflaged and hidden targets, and is not affected by weather and lighting conditions. So it can truly realize day/night 24-hour monitoring. This makes the security system superior in detection performance.
Advantage 4: Fixed-point monitoring and cruise monitoring can be realized.
Aiming at the key fire prevention areas of wooden cultural relics, infrared thermal imaging equipment is used for online real-time fixed-point monitoring. At the same time, cruise monitoring can be carried out, and cruise scans can be set up for several key fire prevention areas to dynamically monitor the fire safety of wooden cultural relics protection units in real time.
In addition, the infrared thermography technology can also realize the dual protection of thermal imaging temperature measurement and fire point monitoring. By distinguishing temperature abnormality and fire point monitoring, the back-end platform will automatically send out early warning and alarm signals. The platform can achieve full intelligent functions to facilitate the personnel on duty management, saving a lot of security costs.
