Temperature measurement method based on image data normalization technology

Abstract

The invention relates to a temperature measurement method based on an image data normalization technology. The temperature measurement method comprises steps of (1) starting an uncooled thermal infrared imager to reach thermal balance; (2) obtaining an image after non-uniform correction; (3) removing blind pixels; (4) measuring black body radiation by using the uncooled thermal infrared imager toobtain gray value data of a certain pixel image corresponding to each temperature Ti; (5) normalizing the gray value data of the image; (6) establishing a temperature measurement mathematical model ofthe relationship between the normalized image gray value and the temperature; and (7) calculating a temperature value corresponding to each gray scale by utilizing the temperature measurement mathematical model, wherein an image gray scale value inputted into the temperature measurement mathematical model needs to be normalized according to the step (5). The temperature measurement method is advantaged in that the relation between the normalized image data and the temperature is used for fitting the curve model, the model is used for temperature measurement so that the temperature measurementprecision can be improved, repeatability precision can further be improved, that is to say, the temperature measurement result of the same pixel used for each startup is not greatly changed.

Description

technical field [0001] The invention relates to the technical field of infrared temperature measurement, in particular to a temperature measurement method based on image data normalization technology. Background technique [0002] Infrared thermal imaging technology is a technology that receives infrared radiation emitted by a target at a certain distance through an infrared sensor, and then transforms it into a video thermal image of the target by a signal processing system. It converts the thermal distribution of an object into a visual image , and displayed on the monitor in grayscale or pseudo-color, so as to obtain the temperature distribution field of the measured target. Infrared thermal imaging temperature measurement technology is a non-contact temperature measurement. Because of its fast response speed, no damage to the temperature field of the measured object, and the ability to detect some difficult-to-reach or forbidden-to-contact measured objects online, this t...

AI Technical Summary

Problems solved by technology

Infrared thermal imaging temperature measurement technology is a non-contact temperature measurement. Because of its fast response speed, no damage to the temperature field of the measured object, and the ability to detect some difficult-to-reach or forbidden-to-contact measured objects online, this technology has gained a lot of attention. Widely used, some existing infrared temperature measurement methods have low temperature measurement accuracy and need to be improved

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