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Thermal imaging solution for human body temperature measurement
Release date: 2020-07-30 18:29

The non-contact temperature measurement is very suitable for the current epidemic prevention needs. It can replace the original temperature gun and avoid the risk of secondary infection. It is a necessary good helper for the defense of complex places where the flow is relatively concentrated and complex in various units, enterprises, stations, ports, airports, shopping malls, campuses, hotels, restaurants and hospitals. Analysis of the current situation, SARS, Ebola, H1N1, and Wuhan new coronavirus carriers and infections have common case characteristics: fever and cough. In clinical practice, doctors need to measure the body temperature of patients with thermometer or ear temperature gun, so as to determine the physiological state of patients. However, in public places, especially in the dense crowd, if we still use the temperature measurement method in the hospital to monitor and alarm, the cost of manpower and equipment is huge, and the risk of infection is high, the detection efficiency is low, and it is difficult to achieve the role of prevention and warning.

There are two types of instruments for measuring human body temperature: contact type and non-contact type. The contact instrument has the following disadvantages: 1. The speed of temperature measurement is slow, which requires human intervention to measure temperature one by one; 2. When measuring, it needs to contact with the object to be measured, which often leads to cross infection due to incomplete disinfection in use; and non-contact instrument, in which close distance is required Thermal imaging temperature measurement The technology has been widely mature and applied in various industries, with the following advantages: 1. The measurement speed is fast, and the detection time is usually less than 1 second; 2. The detection rate is high, and it can detect the body temperature of multiple people at the same time; 3. There is no need to contact with the measured object in the measurement process, and there will be no cross infection due to incomplete disinfection; 2

The Ministry of transport held a ministerial meeting to urge the transport departments at all levels to cooperate with the health department to provide sites and set up passenger temperature monitoring facilities in the transport hub passenger stations under the joint prevention and control working mechanism. 1. Current situation analysis: SARS, Ebola, H1N1, and Wuhan new coronavirus carriers and infections have common case characteristics: fever and cough. In clinical medicine, doctors need to measure the body temperature of patients with thermometer or ear temperature gun, so as to determine the physiological state of patients. However, in public places, especially in the dense crowd, if we still use the temperature measurement method in the hospital to monitor and alarm, the cost of manpower and equipment is huge, and the risk of infection is high, the detection efficiency is low, and it is difficult to achieve the role of prevention and warning.  

The goal of the project is to meet the demand of human body temperature measurement in public places Thermography and thermography With the support of modern information technology, we will build a human body temperature measurement information system covering various public places, including network interconnection, information resource sharing, unified standards and specifications, and complete application functions. Combined with current biometric technology Thermography and thermography Video intelligent analysis and other technical means, focusing on "high precision, high efficiency, low cost, flexible control, safe and reliable", to achieve the grand construction goal of "effective prevention, timely control and elimination of public health emergencies and their hazards".  

The measurement needs to contact with the measured object, often due to incomplete disinfection in use, cross infection occurs; with the maturity of detection technology, non-contact instrument is widely used in human body temperature measurement in public places, among which the short-range Thermal imaging temperature measurement The technology has been widely mature and applied in various industries, with the following advantages: 1. The measurement speed is fast, and the detection time is usually less than 1 second; 2. The detection rate is high, and it can detect the body temperature of multiple people at the same time; 3 In the process of measurement, there is no need to contact with the measured object, and there will be no cross infection due to incomplete disinfection. Therefore, in public places such as stations, subway stations, high-speed railway stations, airports, ferry terminals, schools and other places, the non-contact temperature measurement method is usually used to quickly measure the pedestrians at the entrance and exit, find out the abnormal temperature personnel in time, and implement the method quickly Interventions to prevent the spread of the virus in public places.

At the same time, to the greatest extent to protect the management personnel in public places for epidemic protection, to prevent internal personnel from frequent contact with human body and the occurrence of infection of virus. The demand for high-precision temperature detection. At present, the new type of coronavirus is prevalent, and the early infected people have limb fatigue and fever. Therefore, it is necessary to adopt high-precision non-contact temperature detection method to distinguish normal people from those suspected of low temperature infection. It is suggested that the measurement accuracy of the temperature detector should not exceed ± 0.3 ℃. Due to the mobility and continuity of personnel in public places, it is required that the temperature detection device can continuously measure temperature for 7 * 24 hours, and the continuous detection and prevention of personnel in the detection area shall be strengthened.

In nature, any object whose absolute temperature is greater than zero (- 273 ℃) can radiate electromagnetic wave energy related to its own properties and temperature. This phenomenon is thermal radiation phenomenon or infrared radiation. Infrared radiation is one of the most extensive electromagnetic wave radiation in nature. It is based on the fact that any object will produce irregular movement of its own molecules and atoms in the conventional environment, and constantly radiate thermal infrared energy. The more intense the movement of molecules and atoms is, the greater the radiation energy is. Conversely, the smaller the radiation energy is. Composition of thermal imaging camera: In areas with large flow of people, such as schools, shopping malls, banks, stock exchanges, cinemas, markets and other public places, the screening temperature measurement method is adopted to quickly realize the screening of fever personnel, and avoid the crowd and gathering caused by manual screening. In the entrance and exit area close to the pedestrian flow, a dual spectrum temperature measuring camera is set, and the lens is aimed at the entrance and exit passage. The temperature measuring camera is set with an alarm threshold close to heating (for example: 37.3 ℃), When the flow of people reaches or exceeds this threshold value, the back-end platform alarms to remind the staff, and can carry out the second temperature measurement for the suspected fever personnel, which can not only quickly screen, but also avoid the risk of cross infection caused by one-to-one close contact temperature measurement.

 

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