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Infrared thermal imaging detection system helps to build the first defense line for epidemic prevention
Release date: August 6, 2020 16:54

Under the situation of epidemic spreading, no measures should be taken too much. Everyone has the responsibility, and technology enterprises should take the lead. Although there is an incubation period, the incubation period is not febrile and infectious. Although body temperature is not the only standard, it is necessary to screen body temperature before there is a completely accurate and effective method. The traditional methods of measuring body temperature include mercury thermometer and infrared temperature gun, which have obvious disadvantages: it needs time, contact and cooperation. In the current situation, contact and cooperation may lead to new risks, and it is not feasible in the adult traffic environment.

Temperature measurement system of infrared thermography The advantages are obvious: long distance, non-contact, multi-objective, suitable for airport, subway, railway and building entrance. The significance of the temperature test lies in the pre screening, which is mainly used to detect suspected fever in the population, and further accurate temperature measurement and follow-up examination. Key words: screening in public places, rapid and elimination of the majority. At present, the "infrared thermal imaging thermometer" has been put into operation in the crowded areas of many cities in China, including airports, subways, railway stations, etc., and the orders of many enterprises have been in the "out of stock" state. As many other outbreaks are accompanied by "fever", in the future, thermometers may become the standard configuration of "crowded" places like face recognition equipment.  

At present, infrared thermal imaging camera and background software constitute a "body temperature screening system", which has the following functions: 1. Non contact rapid temperature screening; 2. Long distance, large area, dense flow of people; 3. Intelligent alarm and fast statistics; 4. Infrared and visible light superimposed temperature measurement analysis results; while the combination of AI function (mainly face recognition) and thermal imaging is still in the preliminary exploration stage. Thermal imaging is based on the principle of thermal imaging. According to the theory of radiation, as long as any object is not at absolute zero (- 273.15 ℃), there is thermal radiation.

Thermal imaging It can detect infrared energy (heat) by non-contact, and convert it into electrical signal, then generate thermal image and temperature value on the display, and can calculate the temperature value. In order to achieve accurate measurement, Thermal imaging human body temperature measurement system The blackbody temperature can be used as the reference temperature. The blackbody is installed in the field of view of the camera, and the latter measures the temperature of the blackbody and corrects the temperature of the blackbody in real time on the basis of this, so as to meet the requirement of high accuracy ± 0.3 ℃ for human body temperature measurement. The monochromatic emittance of blackbody in thermal equilibrium is a function of wavelength and temperature. At a certain wavelength, the monochromatic emissivity of blackbody is a single value function of temperature. The temperature of blackbody can be obtained by measuring the monochromatic emissivity under a certain wavelength. This is the theoretical basis of radiation thermometry, Planck radiation law of blackbody radiation. When measuring temperature, the thermal imaging camera is aimed at the object to be measured. The detector of the thermal imaging camera receives the energy radiated by the measured object, which is converted into the corresponding electrical signal through the signal processing circuit or further directly displays the temperature value of the measured object through the display.   

Q: How many faces can a camera capture at the same time? A: one meter line is needed to plan the personnel path. Usually, there are 10-20 traffic per minute in a single channel (with the help of security inspection and flow control or other identity verification, there will be no missing measurement or congestion problems due to personnel flow). Q: Can the temperature measurement data be used as the basis for judging heating? A: No, the thermal imaging camera is used for body temperature screening, which means that the temperature of the human body surface is measured by the thermal imaging camera through non-contact, and then the professional medical temperature measurement is conducted for the individual with abnormal temperature. After medical measurement review, the patient still has fever, and the client shall deal with it according to their emergency plan. Q: Can it be installed outdoors? A: No, it is not recommended to install it outdoors or in the areas directly connected with the outdoor. These areas will affect the accuracy of temperature measurement due to environmental reasons. It is suggested that the indoor environment should be relatively closed and airless.

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