Temperature correction method for infrared temperature measurement, and infrared thermal imager

Abstract

The invention discloses a temperature correction method for infrared temperature measurement, and an infrared thermal imager. The method completes the temperature correction through the following steps: obtaining the position vectors between N black bodies at different positions and an infrared thermometer, improving the correction precision through the black bodies at different positions, and providing a data source for the temperature correction; then, respectively measuring the temperatures of the black bodies by using a contact type temperature measuring sensor and the infrared thermometer, calculating the relative temperature differences of the black bodies, and based on the temperature differences and the spatial relationship between the black bodies and the infrared thermometer, incombination with preset parameters of the external environment such as temperature, humidity, wind speed, illumination conditions and the like, using a mathematical analysis technology to obtain correction parameters, and correcting the temperature measurement value of a measured object to complete temperature correction of the infrared thermometer. The high-precision constant-temperature controlof the black bodies is converted into real-time accurate monitoring of the temperature of the black bodies, so that the calibration cost is effectively controlled, and the temperature measurement accuracy is ensured.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement using infrared radiation, in particular to a temperature correction method for infrared temperature measurement and an infrared thermal imager. Background technique [0002] Infrared thermal imaging thermometer has a large number of applications in industrial temperature measurement, human body temperature measurement and other scenarios due to its characteristics of non-contact, long temperature measurement distance, multi-point simultaneous temperature measurement, and high temperature measurement efficiency. [0003] In actual use, the accuracy of temperature measurement by infrared thermometers is greatly affected by the environment, especially outdoors, where the temperature measurement error is large, and the ambient temperature, measurement distance, occlusion, surface emissivity, surrounding heat sources, etc. are all errors in temperature measurement influencing factors. ...

AI Technical Summary

Problems solved by technology

This method is to use the temperature sensor installed next to the infrared thermometer to correct the measurement results of the infrared thermometer. The temperature sensor obtains a temperature value close to the ambient temperature, which is far from the body temperature of the human body. In addition, the distance is ignored. Attenuation affects the measured object, so it is difficult to obtain the true temperature of the measured object

[0006] It can be seen that the calibration process has caused problems in the cost control and temperature measurement accuracy of infrared temperature measurement technology.

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