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The Application of Infrared Imaging Technology in Disaster Prevention Monitoring of Urban Underground Space

The Application of Infrared Imaging Technology in Disaster Prevention Monitoring of Urban Underground Space

May 13,2022
The public safety of urban underground space is related to the overall national strategy and is one of the important tasks of national security. The unique closed space and dense flow of people in the underground space make its safety accidents more sudden, destructive, and bad international influence.

Therefore, whether it is the prevention and control of terrorist explosions in peacetime, or the response to nuclear, biological, and chemical attacks in extraordinary times, disaster prevention monitoring and emergency search and rescue are urgent issues to be solved to ensure the safety of urban underground space.

Because of its wide application in military and civilian fields, infrared imaging technology has attracted great attention from developed countries in the world and has become one of the important symbols of national scientific and technological development level and technical strength.

Infrared imaging equipment can use the temperature difference between targets to image without lighting and can detect the temperature changes of all objects in the field of view. It is especially suitable for real-time monitoring of underground space and effective observation in emergency search and rescue of explosions and fires. 

Therefore, it is urgent to strengthen the application research of infrared imaging technology in the security of underground space. Among them, progress has been made in ultra-short-wave infrared imaging components, multi-functional small handheld infrared imagers, and infrared fire-fighting helmets.

(1)Multifunctional small handheld infrared imager

Urban underground pipelines often require regular inspections by safety inspectors to prevent disasters such as leakage, fire, and rupture of various pipes and cables. At the same time, when a disaster occurs, it is necessary to find the root cause, especially in the case of a power failure and heavy smoke and dust to carry out rescue, and it is necessary to effectively observe the scene even in the case of poor visibility. The multi-functional small hand-held infrared imager developed by infrared imaging technology is used to observe the scene and provide basic support for the follow-up rescue and repair work.

The multifunctional small handheld infrared imager can perform real-time infrared imaging detection on various targets, record (photograph, video) scene scenes in real time, and playback infrared video images. The product is powered by a battery and has a long continuous working time. It is small in size, light in weight, easy to carry, and can be operated with one hand.

(2)Fire helmet infrared imaging system

When there is a danger of explosion and fire in the urban underground space, due to the lack of electricity, the lighting system begins to fail, and the thick smoke seriously affects the use efficiency of conventional fire helmets. The use of infrared imaging helmets enables firefighters to clearly observe the fire scene, easily find the path in and out of the fire scene, and reduce casualties.

The system adopts the infrared focal plane non-uniformity adaptive correction method based on eigendecomposition, the imaging parameter optimization technology of continuous frame images, and the infrared pseudo-color image enhancement algorithm based on the local linear embedding (LLE) algorithm, which improves the clarity of the observed image. It is helpful for firefighters to detect and identify targets with high definition and high resolution through the helmet observation mirror during the movement, and record (photograph, video) the scene in real time. At the same time, the infrared image wireless transmission function can be used with the Get in touch with the command center.

The system is powered by batteries, has a long continuous working time, has the characteristics of light weight, strong shock resistance, and convenient operation, and is similar in structure to ordinary fire helmets.


Modern warfare is a high-tech war under the threat of nuclear. In the security of urban underground space, it is necessary to vigorously strengthen the military defense preparation for nuclear, biological, and chemical attacks. In the urban underground space under nuclear, biological, and chemical attacks, the passage environment is relatively harsh, and there is usually a large amount of smoke released for protection (fog elimination). Special rescue equipment has high requirements for passage space and relatively large traffic volume. Advanced short-wave infrared The imaging fog-penetrating device is used for observation and identification to facilitate rescue.

(4)Infrared imaging terminal for personnel statistics in the control area

A relatively closed underground space usually consists of many areas. Once a stampede accident occurs, it is particularly necessary to know the number of people in the area. To this end, it is necessary to design an infrared imaging terminal based on infrared imaging for personnel statistics in the control area, which can count the flow of people in various areas of the underground space for 24 hours, and use infrared imaging and corresponding video stream image analysis technology to carry out personnel entry and exit within the scope of video surveillance. 

Traffic analysis and counting are stored and sent to the command center at the same time to form a real-time report of personnel in and out, and the statistical accuracy rate can reach 98%.

(5)Networked temperature measurement infrared imaging monitoring system

Each area of urban underground space is small and scattered. Due to the different nature and function of each area, the purpose of monitoring is also different. For the safety prevention of sudden fire and explosion, manual inspection is difficult or ineffective. By building a networked temperature measurement infrared imaging monitoring system, hidden situations can be discovered in time to prevent problems before they occur. 

This kind of infrared imaging equipment terminal integrating detection and temperature measurement can observe the scene image at any time, and at the same time can monitor the temperature change state of the observation target, and automatically recognize and alarm when the abnormal temperature of the target is detected.

The equipment adopts high-speed parallel data flow transmission technology, uploads image information to the integrated manager, performs multi-point distributed network monitoring, forms a networked infrared imaging monitoring system, and obtains the on-site situation of the monitoring area in time.

(6)Distributed infrared imaging security monitoring system

In response to the need for anti-terrorism monitoring in the underground space of large cities, that is, under low illumination conditions, suspicious persons and explosive intrusions around the monitoring point can be found and identified, sound and light or small-scale early warning is carried out, and target ranging, speed measurement, and tracking alarm are carried out at the same time, according to the set target and approaching speed, the monitoring center, and the alarm device are linked.

The use of infrared and visible light dual-spectrum video surveillance, comprehensive use of multi-spectral imaging fusion processing, infrared image background adaptive enhancement, infrared focal plane adaptive correction, and other technologies, effectively enhance the quality and reliability of infrared images under low illumination.

The infrared imaging video surveillance terminal has the characteristics of a compact structure and low power consumption. Through microwave wireless video transmission, the system adopts distributed terminal monitoring technology under comprehensive integrated management, combined with target static and dynamic feature recognition methods, and establishes a typical target feature library. It has real-time target recognition and abnormal behavior prompt functions and realizes observation. The high-speed processing of image data, real-time video recording, photographing and playback functions greatly improve the monitoring and search and rescue command capabilities of underground spaces in the absence of lighting, thick smoke, and high temperature.

In summary, infrared imaging technology has broad application prospects in the field of urban underground space security. As one of the key technologies for the development of national strategic emerging industries, infrared imaging technology has attracted much attention; after decades of development of uncooled infrared imaging technology, the localization level of its core detection devices has been further improved, and the imaging quality is stable and the application scenarios are wide. 

The large-scale cost has already met the conditions for industrialization, which provides the basic guarantee for effective video imaging security monitoring and emergency search and rescue for the protection of urban underground space explosions and nuclear, biological, and chemical attacks.

The application of infrared imaging technology in urban underground space disaster prevention monitoring is introduced in detail above. If you have questions or want to buy infrared thermal imaging equipment, please contact us.

JAVOL is a professional custom infrared thermal imaging cameras and core components manufacturer, relying on multi-spectral high-sensitivity photoelectric sensor chips of advanced compound semiconductor materials, using deep learning AI algorithms as the engine, integrating low-light night vision technology, infrared thermal imaging Technology, short-wave infrared technology, and multi-spectral fusion technology, our company designs, develops and manufactures advanced imaging products and system solutions, which are widely used in machine vision, autonomous driving, drone payloads, high-end manufacturing, and medical diagnosis.
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