Method of temperature drift compensation for infrared thermometers

Abstract

An embodiment of the invention discloses a method of temperature drift compensation for infrared thermometers. The method includes: setting temperature sensors on a core and a retainer plate respectively, responding to black-body radiation in a thermostat, and acquiring multiple response output groups by controlling the thermostat and the continuous change of black-body temperature; linearly fitting the response output of the infrared thermometer to black-body temperature, interior temperature of the thermostat and first temperature of the core by the obtained data groups; compensating temperature drift caused by the temperature of the core through fitting results, and acquiring a function of relation of the response output of the infrared thermometer to the black-body temperature, the interior temperature of the thermostat and the first temperature of the core; calibrating with the retainer plate, and acquiring current ambient temperature according to the fitted relation function; removing the retainer plate, measuring the temperature of a target object by the infrared thermometer, and calculating the temperature of the target object according to the current response output, the current ambient temperature and the fitted relation function. The method has the advantages that temperature change can be monitored in real time for the calibrating retainer plate and the core, the temperature drift caused by the change in the temperature of the core and the ambient temperature is compensated, nonuniformity of the infrared thermometer can be corrected effectively, and temperature measurement is more accurate.

Description

technical field [0001] The invention relates to the field of infrared imaging, in particular to a method for compensating the temperature drift of an infrared thermometer. Background technique [0002] All objects with a temperature higher than absolute zero are constantly emitting infrared radiation energy to the surrounding space. The distribution of infrared radiation energy according to the wavelength has a very close relationship with its surface temperature. Measurement can accurately measure its surface temperature. [0003] With the development of modern technology, infrared temperature measurement technology is becoming more and more perfect, and gradually penetrates into various fields. The development of new infrared temperature measurement technology and the improvement of the performance of the infrared temperature measurement system are the requirements of the development of the times. [0004] Among the many infrared temperature measurement technologies, the...

AI Technical Summary

Problems solved by technology

These methods can compensate the temperature drift to a certain extent, but in the actual temperature measurement process, the temperature of the baffle itself used for calibration will also change, and the influence of changes in the system core and ambient temperature on the infrared detector cannot be controlled , so these methods cannot completely compensate the temperature drift of the infrared temperature measurement, the non-uniformity correction of the infrared thermometer cannot be effectively improved, and the temperature measurement accuracy of the entire system cannot achieve the ideal effect.

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