An infrared human body temperature measurement system and temperature measurement method

Abstract

The application discloses an infrared human body temperature measurement system and a temperature measurement method. The method includes: adding a communication module to a black body and an infrared thermometer respectively; , the infrared thermometer obtains the black body radiation surface temperature measured by the radiation surface temperature sensor in real time through the communication module, and uses the measured black body radiation surface temperature as a benchmark to calculate the human body temperature. This application connects the black body and the infrared thermometer through a certain communication mechanism. The infrared thermometer can obtain the temperature of the black body radiation surface in real time, and the real-time black body radiation surface temperature can make up for the black body radiation surface due to the temperature control accuracy of the temperature controller. It can improve the temperature measurement accuracy and stability of the infrared human body temperature measurement system.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to an infrared human body temperature measurement system and a temperature measurement method thereof. Background technique [0002] At present, there are generally two types of infrared human body temperature measurement systems: the first is the infrared human body temperature measurement system without a blackbody. Large; the second is the infrared human body temperature measurement system with a black body. The function of the black body is mainly to provide a temperature reference for the infrared temperature measurement. Small. [0003] The existing infrared human body temperature measurement system with a black body is generally composed of an infrared thermometer and a black body. The black body is generally set at about 37°C during work and placed in the field of view of the infrared thermometer. The infrared thermometer senses the temperature by comparison...

AI Technical Summary

Problems solved by technology

That is to say, the accuracy and stability of temperature measurement in the infrared human body temperature measurement system with black body are based on the stability and accuracy of the temperature of the black body radiation surface, but the temperature of the black body radiation surface is not completely ideal, and will have its own accuracy and stability issues

[0004] The influence of the black body on the accuracy of the infrared human body thermometer mainly has three aspects: the first is that there is an error between the temperature of the radiation surface of the black body and the actual set value, the error range is determined by the temperature controller used inside the black body, and the accuracy of the general temperature measurement system is ±0.1°C, and the accuracy of human body temperature measurement is generally required to be ±0.3°C, then the error of the blackbody accounts for at least 1 / 3 of the measurement error of the entire system; the second is the stability of the temperature of the blackbody radiation surface, the blackbody The temperature of the radiation surface will have a certain drift with time. This temperature drift is mainly caused by the change of the characteristics of the electronic components caused by the change of the internal ambient temperature during the operation of the blackbody. The drift of the characteristics of the electronic components will cause the characteristics of the radiation surface temperature sensor drift, which in turn leads to a certain drift in the temperature of the blackbody radiation surface

This part of the influence is difficult to overcome for infrared thermometers; the third is that in practical applications, it will be found that the temperature of the black body radiation surface will be affected by the actual environment, especially if there is a strong wind in outdoor scenes, it will affect the temperature of the infrared thermometer. The temperature stability of the radiating surface of the black body is greatly affected. When the wind blows, the temperature will change greatly, exceeding ±0.1°C. In this case, it will have a greater impact on the real-time accuracy of the infrared thermometer.

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