- April 20, 2020
April 20, 2020 - The pandemic triggered by the coronavirus currently poses challenges to public life and health care systems worldwide. A contribution to containing the rapid spread of the virus is the interruption of infection chains. In addition to the precautionary measures known in this field, the detection of infected people can be a contributory factor.
Certainly, thermographic cameras can neither detect the virus itself nor a person carrying the virus. However, these cameras enable the non-reactive, contactless and planar recording of surface temperatures. Hence, they are suitable for the detection of elevated body temperatures or fever, which can be an indication of a possible virus infection of the people subjected to screening. Such indications must, of course, always be followed by other examination methods that allow a reliable positive or negative statement about the disease and to initiate appropriate actions!
The thermographic temperature measurement for fever detection puts high demands on suitable thermographic cameras: In addition to thermal resolution, which can make even the smallest temperature differences visible, there must be stability and measuring accuracy in order to be able to reliably distinguish a person with an elevated body temperature or fever from a person without these symptoms using critical temperature thresholds and alarm values. Another criterion is the required high geometric resolution, which is expressed in the number of so-called infrared (IR) pixels. This is necessary because the area that has been proven in several studies to be suitable for reliably detecting fever and elevated body temperature at the inner eyelid angle has only a small surface area, but must be sharply mapped for error-free temperature measurement. The measurement itself takes less than a second and is usually carried out in access areas, for example at the entry control at airports, where the people who are to be screened are already lined up. Largely determined by the wide-ranging requirements of the users, the evaluation of the measured data can range from simple manual use to select people with elevated body temperature or fever for further examinations to automatic detection and storage.
The digital VarioCAM HD series thermographic cameras from InfraTec are based on thermally and geometrically high-resolution microbolometer FPA detectors with up to (1,024 × 768) IR pixels. They deliver 16-bit thermographic images in realtime and are therefore suited as instruments for fever detection. Large external displays can be connected to the cameras via HDMI interface to visualize the thermal images. The range of accessories, interchangeable lenses for adaptation to local requirements, optional PC or laptop connection, the IRBIS 3 software packages with various functionalities as well as expert advice from experienced InfraTec engineers complete the range of services. This results in a thermography system that is tailored to the requirements of fever detection for the individual user to operate.
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