Automatic Error Compensation Method of Infrared Thermal Imaging Temperature Measurement System

Abstract

The invention provides an automatic compensation method for distance and angle errors of a thermal imaging temperature measurement system. According to the infrared thermal imaging image acquired by a thermal imager, the abscissa, ordinate and Polar coordinates; combined with the installation height of the thermal imager, the focal length, the focal length of the thermal imager lens, and the average height of the human body, the distance value and deflection angle value of the measured target are calculated through geometric relations; using the distance stored in the thermal imager in advance Error calibration curve, the original measured temperature value is multiplied by the corresponding calibration value, and the product is the compensated temperature value. The distance and angle error compensation method proposed by the present invention does not need any additional hardware equipment, and does not require additional acquisition actions. It can automatically adapt to the distance and deflection angle changes of the measured target, zero investment, zero lag, and high cost performance. It has wider practicality and versatility.

Description

technical field [0001] The invention relates to an error compensation method of an infrared thermal imaging temperature measurement system, in particular to an automatic compensation method for distance and / or angle errors of an infrared thermal imaging temperature measurement system. Background technique [0002] The advantages of the infrared thermal imaging body temperature testing system are obvious: long-distance, non-contact, multi-target, suitable for airports, subways, railways and building entrances, etc. The significance of body temperature testing lies in early screening, which is mainly used to find people with suspected fever in the crowd, and further conduct accurate body temperature measurement and follow-up inspection. [0003] However, the current thermal imaging body temperature screening system still has serious deficiencies, especially due to the influence of various factors in the use process, resulting in a significant drop in temperature measurement ac...

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Problems solved by technology

[0008] In view of the defects in the prior art, the purpose of the present invention is to provide an automatic compensation method for distance and angle errors of the infrared thermal imaging temperature measurement system, to solve the problem that the existing thermal imaging temperature measurement system is sensitive to the target distance, and to improve the temperature measurement accuracy

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