Q1. What is the imaging principle of thermal camera?
All objects in nature with a temperature above absolute zero (-273 °C) can radiate electromagnetic waves. Thermal imaging mainly collects infrared light in the thermal infrared band (8μm-14μm) to detect the thermal radiation emitted by the object. After the thermal radiation is detected, it is converted into the gray value, and the gray value difference of each object is used to find and identify the target.
Q2. Can the thermal imager see through glass?
No, there is no thermal imager that can see through the glass because the glass can’t let infrared radiation within 8-14μm pass.
Q3. Will the bright sunlight damage the thermal imager?
It’s not recommended to point the thermal imager to powerful sources of energy, as it may cause permanent damage to the detector.
Q4. Why low temperature image is worse than positive temperature?
This is a characteristic of thermal imaging devices. At the temperature above 0℃, the temperature rise varies with the observed objects (environment and background) due to different heat conductivity coefficients. As a result, high-temperature contrast occurs and the image quality is better. When it is at a low temperature, the observed targets (background) usually cool down to a similar temperature because of reduced temperature contrast. Therefore, the image quality (details in particular) is worse.
Q5. Why the image freezes time to time?
In the course of the calibration process the image freezes on the screen – this is normal and not a defect.
Default calibration mode is “Automatic” (the software decides when calibration is necessary) but you can change it to “Manual” mode in the "Main menu" => "Correction" to calibrate when you need to based on actual image quality.
We recommend using automatic mode all the time.
Q6. What are the advantages of thermal camera comparing to traditional visible light solution for perimeter security?
1) All-weather effective image collection, in no light / bright light / reverse light environment, thermal imaging not only less omission, but also less false report; for fog, rain and other scenarios, thermal imaging based on the principle of the thermal properties of the imaging, can effectively penetrate the fog, rain and etc.;
2) Thermal imaging is based on thermal attribute detection, and the effective alarm distance is several times away than ordinary monitoring; Fewer devices need to be installed when the same distance is monitored;
3) Thermal imaging camera is a dual-spectrum product based on the combination of thermal imaging and visible light. While realizing efficient and accurate detection, it can effectively conduct visible light forensics and save the repeated investment in the construction of visible light forensics system;
4) Thermal imaging products based on the thermal attribute of the intelligent behavior analysis algorithm (Cross the fence, regional invasion, entry / exit area), can ensure the accuracy of the alarm under all-weather conditions.
Q7. How the thermal imaging camera realizes fire prevention?
The most important thing for fire source warning is to detect high temperature targets and timely alarm, which is completely within the capability range of the thermal imaging camera. Thermal imaging can detect fire source targets earlier, and the video output mode is more intuitive, which is easy to trace the cause of the accident.
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