Nanjing Institute of Technology puts into use a new type of human body temperature abnormality detection thermal imaging camera

[ Instrument Network Instrument R & D ] On February 3, the "Human Body Temperature Anomaly Detection Thermal Camera" developed by the infrared imaging technology team of Nanjing University of Science and Technology was officially installed at Gate No. 1 with more people entering and exiting the school to increase the detection of human body temperature abnormalities. . According to Sui Xiubao, a professor at Nanjing University of Science and Technology, the instrument with built-in infrared sensor has a temperature measurement accuracy of 0.1 degrees near the body temperature of 37 degrees, which exceeds the highest temperature measurement accuracy of 0.3 degrees on the market, avoiding abnormal body temperature. False alarms and false alarms of normal temperature personnel.

Human body temperature abnormality detection camera equipment, data map

It is understood that on the evening of January 28th, Chen Qian and Sui Xiubao, the leaders of the infrared imaging technology team of Nanjing University of Science and Technology, urgently discussed countermeasures against the outbreak risk brought by the large number of personnel movements, and then convened Nanjing Spectrum Digital Technology Co., Ltd. The staff formed a research and development team, using the latest infrared detector parameter precise configuration, high dynamic infrared image digital detail enhancement, based on scene non-uniformity correction and fast temperature detection and calibration and other core technologies. After four days and four nights of research, it was completed. From scheme formulation, architecture construction, software code writing to hardware circuit reconstruction, equipment testing, etc., a new type of "human body temperature abnormality detection thermal imaging camera" has been developed.

Infrared lens on the instrument, data map

It is understood that the instrument is composed of infrared lens, infrared sensor, infrared image signal processing chip, high-precision temperature detection algorithm and host computer.

The infrared lens condenses the weak energy signal actively sent by the human body. The infrared sensor receives the energy signal and converts the energy signal into an electrical signal. The electrical signal undergoes signal-to-noise ratio enhancement, non-uniformity correction, signal enhancement, and intelligent processing of energy signals. The normal temperature threshold set by the host computer is adaptively compared. As long as a person passes by, the device will compare with the set threshold in real time and quickly catch people with abnormal temperature.

The infrared lens condenses the weak energy signal actively sent by the human body, and the infrared sensor receives the energy signal. Data map

The instrument optimizes the temperature measurement algorithm, focuses on abnormal temperature detection, and provides real-time alarms on all abnormal temperature points entering the field of view of the thermal imager. Theoretically, early warning of abnormal temperature points exceeds 16 million per second, which greatly improves human body temperature. Anomaly detection efficiency can meet the needs of epidemic prevention in all traffic-intensive places.

It is understood that the research team will further cooperate with the thermal imaging camera manufacturers in Nanjing to raise more spare parts and strive to produce more “human body temperature abnormality detection thermal imaging cameras”, which will be quickly transferred to relevant departments for follow-up Contribute to the prevention and control of the epidemic.

Further reading: Principles of temperature measurement by forehead thermometers

The peak of the return trip is coming. Due to the epidemic situation, people will be required to take temperature measurements when entering and exiting public places and taking transportation. When measuring body temperature, non-contact infrared thermometers are commonly used by surveyors, also known as "frontal thermometers". In the process of measuring body temperature, the working principle of the forehead thermometer is to receive infrared data through the sensor to obtain the induced temperature data. It has the advantages of convenience and speed, and the temperature can be accurately measured in a few seconds. At the same time, because it does not touch the skin and avoid the possibility of cross infection, it is very suitable for temperature measurement in public places. At the same time, some experts have also suggested that the forehead thermometer is susceptible to external temperature and subject's movement, sweat, metabolism, skin cleanliness, etc., and can only be used as a preliminary temperature screening. If the body temperature is abnormal, it should be measured again with an ear thermometer or a mercury thermometer to determine the true body temperature of the subject.