What is the principle of thermal imaging temperature measurement?Do you know?

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Foreword:

Fever is the most common symptom of new coronary pneumonia, so measuring body temperature has become an important means of epidemic prevention and control.In some occasions with high traffic, such as airports, stations, hospitals, schools, etc., the traditional body temperature measurement methods are inefficient and difficult to meet the demand, so we see the application of thermal imaging temperature measurement in these scenarios.

So what is the principle of thermal imaging temperature measurement?

Infrared thermal imager uses infrared detectors, optical imaging objective lenses and optical-mechanical scanning systems (currently advanced focal plane technology eliminates the need for optical-mechanical scanning systems) to receive the infrared radiation energy distribution pattern of the measured target and reflect it to infrared detection.On the photosensitive element of the detector, between the optical system and the infrared detector, there is an opto-mechanical scanning mechanism (the focal plane thermal imager does not have this mechanism) to scan the infrared thermal image of the measured object, and focus on the unit or spectroscopic detection.On the device, the infrared radiation energy is converted into electrical signals by the detector, and the infrared thermal image is displayed on the TV screen or monitor after amplification, conversion or standard video signal.

Infrared is an electromagnetic wave that has the same nature as radio waves and visible light.The discovery of infrared light was a leap forward in our understanding of nature.Using a special electronic device to convert the temperature distribution of the object surface into an image visible to the human eye, and display the temperature distribution of the object surface in different colors, is called infrared thermal imaging technology, and this electronic device is called an infrared thermal imager.

Infrared thermal imaging is the science of using optoelectronic devices to detect and measure radiation and to establish a correlation between radiation and surface temperature.Radiation refers to the movement of heat that occurs when radiant energy (electromagnetic waves) moves without a direct conducting medium.Modern thermal imaging cameras work by using optoelectronic devices to detect and measure radiation and establish a correlation between radiation and surface temperature.All objects above absolute zero (-273°C) emit infrared radiation.The infrared thermal imager uses the infrared detector and the optical imaging objective to receive the infrared radiation energy distribution pattern of the measured target and reflect it on the photosensitive element of the infrared detector to obtain an infrared thermal image, which is related to the thermal distribution on the surface of the object.field corresponds.In layman's terms, an infrared thermal imager converts the invisible infrared energy emitted by an object into a visible thermal image.The different colors on the top of the thermal image represent the different temperatures of the object being measured.By viewing the thermal image, you can observe the overall temperature distribution of the measured target, study the heating of the target, and then judge the next step.

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