Dahua announces development of new-generation Thermal Cameras

By VARINDIA - 2018-06-14

Dahua announces development of new-generation Thermal Cameras

Dahua Technology has announced that it has developed a new generation of thermal imaging devices.

 

Dahua Technology has developed a new generation of thermal imaging devices with innovative functions that balance visible light with infrared, enabling users to effectively monitor an area under all lighting conditions. In addition, these functions include advanced capabilities such as intelligent temperature measurement and behaviour analysis, further extending the scope of surveillance applications such as perimeter protection or equipment predictive maintenance in substations.

 

The new products adopt advanced uncooled infrared detectors with 400x300 effective pixels, realizing a 40% increase over the previous infrared detector with -336x256 effective pixels. The benefit is that the field of view is increased.

 

Thermal imaging is probably the most reliable security solution for perimeter protection. A thermal camera is less sensitive to changes in the environment. It detects moving people or objects even in total darkness, 24 hours a day and 7 days a week.

 

The Dahua IVS (Intelligent Video System) is a built-in video analytics algorithm that delivers intelligent functions to monitor a scene for tripwire violations, intrusion detection, and abandoned or missing objects. It requires a certain number of pixels on the target to function properly. The DH-TPC-BF5400-B13 model can be utilized to form a perimeter intruder detection system, performing as an invisible wall. When installed at the recommended height of 5 metres, one camera can cover a 100 metres long fence. Whether it is day or night, as long as someone enters into a targeted area, a warning will be sent to the control centre.
 

A thermal camera is not just for video surveillance, it is also suitable for remote temperature monitoring to prevent accidents. Calculating the corresponding relationship between received radiation energy and temperature, it shows the surface temperature of the target through different gray values. Currently, the temperature measurement tolerance is within a certain range- ±2°C, ±2%. It provides users with real-time information about substation equipment much more efficiently, saving time and labour. If the temperature of equipment or part of the station exceeds a preset threshold, the system will automatically trigger an alarm and alert management.

 

Dahua Thermal Cameras for Remote Temperature Measurement

For a thermal camera, the radiation does not only depend on the temperature, the surrounding environment also emits radiation, especially high temperature objects at close distance, which will be reflected by the target surface. The emitted radiation of the object and the reflected radiation are also affected by atmospheric absorption. Therefore, to measure temperature precisely, it’s necessary to consider the effect of different radiant sources.

 

A precise temperature measurement should include these three steps:

 

• Excluding external temperature interference by placing a baffle or coat of high

emissivity materials on the surface of the target to make the result as accurate as possible.

• Keeping appropriate distance to ensure that the target occupies at least 10x10 pixels in the image.

• Considering energy transmission losses, especially in high-temperature and humidity environments, the atmospheric transmission coefficient is obviously reduced.




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