Automatic error compensation method for infrared thermal imaging temperature measurement system

Abstract

The invention provides a distance and angle error automatic compensation method for a thermal imaging temperature measurement system, and the method comprises the steps: determining the abscissa, ordinate and polar coordinate of a measured target temperature measurement point in an image coordinate system according to an infrared thermal imaging image obtained by a thermal imager; combining the thermal imager installation height, the focus distance, the thermal imager lens focal length and the human body average height value, and calculating the distance value and the deflection angle value ofthe measured target through the geometrical relationship; and multiplying the originally measured temperature value by the corresponding calibration value by using a distance error calibration curvepre-stored in the thermal imager to obtain a product which is a compensated temperature value. The distance and angle error compensation method provided by the invention does not need to additionallyadd any hardware equipment, does not need additional acquisition action, can automatically adapt to the distance and deflection angle change of the measured target, has zero investment and zero lag, has extremely high cost performance, and has wider practicability and universality.

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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