Technical analysis: Does the infrared camera measure body temperature during temperature screening?

Looking back to 2020, thermal imaging cameras are an indispensable part of our production and life. As we all know, infrared thermal imaging camera is an effective screening tool to detect the increase in human body surface temperature. So how does it do it? The global leader in the design, production and marketing of thermal imaging cameras-FLIR Systems, Inc. will take you to reveal the secret.

Looking back to 2020, thermal imaging cameras are an indispensable part of our production and life. As we all know, infrared thermal imaging camera is an effective screening tool to detect the increase in human body surface temperature. So how does it do it? The global leader in the design, production and marketing of thermal imaging cameras-FLIR Systems, Inc. will take you to reveal the secret.

Technical analysis: Does the infrared camera measure body temperature during temperature screening?

The working principle of infrared imaging technology

The infrared thermal imager generates infrared images or thermal images that can Display subtle temperature differences, which enables the thermal imager to create and continuously update the thermal distribution map of the body surface temperature. In addition, FLIR thermal imaging cameras are highly sensitive and can measure subtle temperature differences.

Many FLIR thermal imaging cameras suitable for measuring body surface temperature have built-in functions such as sound and light alarms, which can be set to alarm when a certain temperature threshold is exceeded. Then, the operator can immediately decide whether it is necessary to use other professional temperature measurement tools to conduct further inspections on the subject.

Since the infrared thermal imaging camera generates near real-time images, the entire evaluation process can be completed in an instant, which makes infrared imaging technology very suitable for rapid screening of large numbers of people. At present, public health agencies have been equipped with FLIR thermal imaging cameras in airports, ports, office buildings, and other places with high human flow around the world to implement fast and efficient screening.

Measuring body temperature

Normally, the human body surface temperature is not equal to the human core temperature, and the actual location where the human body can provide the most reliable results (where the skin temperature is close to the human core temperature) is the corner of the eye. However, that does not affect the use of thermal imaging cameras to detect high body surface temperatures. Thermal imaging cameras are very useful in this regard, because the purpose is not to measure the absolute body surface temperature, but to distinguish people whose body surface temperature is relatively high relative to other people, taking into account the environmental conditions of the place where they are located. FLIR’s unique automatic temperature compensator (ATC) function takes this feature into consideration and improves the reliability of temperature measurement.

Technical analysis: Does the infrared camera measure body temperature during temperature screening?Technical analysis: Does the infrared camera measure body temperature during temperature screening?

Infrared image shows hot spots in the corner of the eye

Certain models of FLIR thermal imaging cameras have a screening mode for elevated body surface temperature, which helps to compare the temperature of the person being screened with the temperature of the person being screened before. In the screening mode, the operator can save 10 facial thermal images, and the thermal imager automatically calculates the average temperature value and uses it as a reference value.

Sound and color alarm

All areas where the subject’s face temperature is higher than the pre-defined temperature value can be displayed as a specified color on the thermal image. The built-in alarm enables users to immediately decide whether they need to use other inspection tools for further screening of the subject. In addition, the FLIR thermal imager is equipped with an audible alarm function. If the detected temperature exceeds a preset value, an alarm will be triggered.

Body surface temperature screening thermal imaging camera FLIR EST

At present, FLIR’s improved thermal imaging cameras specifically used for screening of elevated body surface temperature include FLIR T5xx-EST and FLIR Exx-EST series thermal imaging camera screening solutions. The original intention of the design is to simplify the screening process and reduce screening. Check the operator’s burden and follow the recommended social distancing guidelines. The FLIR EST thermal imaging camera screening solution series has built-in enhanced screening modes to provide fast, safe, and simple first-line screening. It can provide the first line of defense at building entrances and areas with high traffic to improve safety And help curb the spread of the new coronavirus.

Technical analysis: Does the infrared camera measure body temperature during temperature screening?

At present, many airports, railway stations, subways and other public places around the world are using FLIR thermal imaging cameras to screen body surface temperature. This is a safe way for thermal imaging camera operators and screened personnel. Fast, non-contact method.

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