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1. High-precision temperature measurement and calibration technology of infrared thermal imaging cameras


Infrared thermal imaging cameras can monitor the target temperature to play the role of accident early warning and location confirmation, large-scale human surface temperature screening, etc. Due to the temperature drift caused by changes in ambient temperature and absorption of infrared radiation, current temperature-measuring China thermal imaging system needs to use a black body for real-time correction.


Aiming at the above problems, a blackbody-free infrared thermal imager temperature measurement calibration and temperature compensation technology is proposed. The high-quality thermal camera derives the principle of infrared temperature measurement and uses multi-blackbody calibration to obtain the prior relationship between the target temperature and the amount of radiation. Aiming at the temperature drift caused by the internal structure of the detector, the nonlinear modeling is carried out by Newton's cooling law to realize real-time temperature compensation.


Through experimental verification, the proposed temperature measurement calibration technology can stably maintain the average relative error of temperature measurement within 0.9% for a long time, which is effectively reduced by 64% compared with the average relative error before calibration, thus realizing the miniaturized infrared thermal scanner. Real-time, stable and high-precision temperature measurement.


2. Applications of infrared thermal imaging cameras in reducing segregation


Segregation is a common process defect in hot mix asphalt, as segregation increases the porosity and water permeability of the pavement, increasing the potential for potholes, pavement looseness, longitudinal cracks and fatigue cracks, while reducing The stiffness, tensile strength and density of the pavement greatly shorten the life of the pavement.


Therefore, the study of anti-segregation technology has obvious pavement operation and economic benefits. Usually we use the method of longitudinal drilling to measure pavement density, however, this method requires a large number of workers and cannot accurately identify problem areas. Clearly, the development of new methods and techniques for the detection of segregation is required. High-quality thermal cameras came into being, and with the universal tool, the predicament of segregation was easily solved.

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