Firstly, the working principles of infrared thermometers and thermal imaging thermometers are different, and there is no one more accurate. Thermal imagers can not only measure temperature but also image.
Infrared thermometer is a specialized tool suitable for quickly identifying personnel whose body environment temperature exceeds a certain special temperature in a group, such as at ticket gates, universities, etc. It plays a key role. Infrared thermometers can only measure surface temperature and cannot measure internal temperature.
The core of a thermal imaging thermometer is a dual spectral imaging camera that combines infrared thermal imaging and visible light imaging. The dual spectral imaging camera is installed in the entrance and exit channels, with the lens directly facing the checkpoint position of the channel (note: for accurate temperature measurement, a blackbody camera must be configured at the tested point for temperature reference calibration of the tested personnel); The thermal imaging thermometer performs real-time online temperature measurement on the exposed parts of the body, such as the face and forehead, of people passing through the checkpoint.
In addition to visible light (usually referred to as visible light), there are also non visible light such as ultraviolet and infrared in nature. Any object in nature with a temperature above absolute zero (-273 ℃) emits electromagnetic waves (infrared) at any time. Therefore, infrared is a widely distributed electromagnetic wave in nature, and thermal infrared is not absorbed by atmospheric smoke clouds.
With the rapid development of technology, utilizing the characteristic of infrared radiation, the combination of applied electronic technology and computer software with infrared technology is used to detect and measure thermal radiation. The amount of heat radiated from the surface of an object to the outside world is measured by a thermal sensor to obtain different heat differences. Through electronic and software technology processing, images with different brightness or color differences are presented, which is commonly known as infrared thermal imaging; After converting the surface heat of the radiation source through thermal radiation algorithm, the conversion between thermal image and temperature was achieved.
When the detected temperature is higher than the set temperature (such as 37.3 ℃), a suspected fever person appears, and the system will immediately lock the high-temperature person and remind the on duty personnel to handle it according to the plan. So, the thermal imaging thermometer is more suitable for temperature screening among adults.
