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An epidemic situation has led to a "high fever" in the cold industry of temperature measurement
Release date: 14:38, July 31, 2020

Since the outbreak of the epidemic, prevention and control measures have been actively taken all over the country. In densely populated areas such as residential areas, shopping malls and station entrances, there are always fully armed staff with infrared thermometers aiming at your forehead. Similar positions and eyes seem to be playing out the Infernal Affairs. As the simplest temperature measuring instrument, Infrared Thermometer Gun It can be said that it played a key role in this war. The advantage of the infrared temperature measuring gun is that the non-contact temperature measurement will not infect the virus, and the temperature measurement speed is fast, which is convenient for large-scale use. A lot of people doubt that the temperature measurement is so fast? Well, this should start with the principle of infrared temperature measurement. In 1800, F.W. huxler, a British physicist, discovered the infrared ray, which was called "invisible light" at that time. Huxler used a prism to decompose the sunlight and put a thermometer on the position of each color light. It was found that the thermometer at the infrared position had the fastest temperature rise and the infrared thermal effect was strong.

After that, people spent more than one hundred years to understand the electromagnetic nature of infrared radiation, understand and explore the basic laws of thermal radiation. With the continuous development of optical technology and electronic technology, infrared technology has become increasingly perfect Infrared temperature measurement At present, the technology is widely used in various fields. Its principle is to use the infrared radiation of the object surface to obtain the measured temperature. According to this principle, the basic temperature measurement process of the infrared temperature measuring gun is as follows: the energy emitted by the human body converges to the infrared detector through the optical system, and the detector converts the incident radiation into voltage signal. After the voltage signal is sent to the receiving system, after data processing and curve automatic fitting, the temperature of the measured human body can be accurately calculated, and the output is displayed in digital mode.

Infrared temperature measurement Is it reliable? If we understand the principle, we can say that the "Infrared Thermometer Gun" is reliable. However, it is not reliable to talk about the reliability without the use method and test environment. As shown in the table below, body temperature can be affected by various external factors. Affected by weather and other factors, Infrared temperature instrument It is generally recommended to use in the indoor environment. Professionals suggest that in order to keep the temperature stable, we should try to keep the mood stable before measuring the temperature and avoid strenuous exercise. At present, an epidemic situation, so that the cold door thermometer industry into the current "hot" phenomenon. In addition to the common hand-held infrared thermometer, it also spawned a lot of innovation in the temperature measurement industry.

Use in public places Infrared thermography temperature measurement It can quickly screen out most suspicious patients. However, this method has a very obvious defect: in the thermal infrared temperature measurement, objects with the same temperature are classified into one class. In other words, the results of infrared temperature measurement are greatly disturbed by environmental factors. The closer the ambient temperature is to or even higher than the target temperature, the greater the uncertainty will be. Based on the theory that "the thermal radiation emitted by the human body is relatively stable and can be" segmented "with the surrounding environment within a specific range, domestic enterprises have developed AI infrared temperature measurement products, and infrared temperature measurement has begun to try to combine with AI related face recognition algorithms. AI infrared temperature measurement first finds the test area through the AI face recognition camera and maps it to the thermal imaging camera; then it takes out the temperature of this area and gives the actual body surface temperature through a certain compensation algorithm.

Infrared thermal imaging temperature measurement system According to the requirements of "high precision, more intelligent, low-cost and fast control", the front-end intelligent spectrum technology eye bispectral video camera (infrared + visible light) is used to identify high-temperature personnel in the flow of people. According to the body and face information of suspected fever patients, Al algorithm technology can be used to assist all kinds of public places (railway station, bus station, subway station, airport, school, workplace, building) The staff in the scene of high-density personnel flow can quickly screen people with abnormal body temperature, realize the AI assisted temperature sensing solution of non-contact intensive flow of people, and solve the traffic efficiency and controllability in open places after the epidemic situation is stable.

 

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