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Infrared body temperature screening instrument and correction method

An infrared and body temperature technology, which is applied in the field of medical equipment, can solve the problems of accelerating body surface heat dissipation, inaccurate measurement results, and affecting measurement results, so as to achieve accurate body temperature measurement and improve measurement efficiency.

Pending Publication Date: 2021-04-02
厦门市计量检定测试院
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AI Technical Summary

Problems solved by technology

Such a measurement method greatly limits the efficiency of the measurement, and the measured person must stand still at the specified position to complete the measurement
At the same time, since the subjects often enter the field of view from different directions, and the heights of different individuals are inconsistent, the measurement angles vary widely, which also greatly affects the actual measurement results
[0004] Infrared screening instruments are generally installed in public places or entrances and exits, or on simple outdoor detection door frames. There is a large airflow in the operating environment, and the airflow will accelerate the heat dissipation of the body surface (forehead part) of the measured human body, affecting the amount of heat radiation.
Therefore, existing infrared screening instruments are prone to inaccurate measurement results due to factors such as measurement angle, measurement distance, and airflow.

Method used

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  • Infrared body temperature screening instrument and correction method

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Experimental program
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Effect test

Embodiment 1

[0075] refer to Figure 1-Figure 2 , an infrared body temperature screening instrument, comprising a housing 1, an infrared detection mechanism 22, a thermal detection mechanism 3, an wind speed measurement mechanism 4, an ultrasonic detection mechanism 5 and a control mechanism 7; port 11; one end of the wind speed measuring mechanism 4 is installed outside the housing 1, and the other end is electrically connected to the PC device 8; The emission port 11 receives infrared radiation; the thermal detection mechanism 3 is adjacent to the infrared detection mechanism 22; They are arranged parallel to each other through the casing 1 ; the thermal detection mechanism 3 and the infrared detection mechanism 22 are respectively electrically connected to the PC device 8 through the control mechanism 7 . Preferably, the wind speed measuring mechanism 4 is a thermal bulb type wind speed sensor.

[0076] refer to figure 1 , the infrared detection mechanism 22 is an infrared thermopile...

Embodiment 3

[0082] S1: the thermistor 31 measures the temperature T of the infrared thermopile sensor 22 itself in real time 热 , when a steady state is reached, T 热 Equal to the internal ambient temperature T of shell 1 内 . Platinum resistor 32 measures the external ambient temperature T of shell 1 2 . When T 2 with T 热 If there is a discrepancy between them, it needs to be corrected.

[0083] S2: First, place the shell 1 in a standard incubator, set the temperature of the incubator at 25°C and run it stably, then raise the temperature to 35°C at a heating rate of 0.2°C / min. During this process, when the external ambient temperature is 25°C+n°C (n=1, 2...10), the temperature difference between the temperature measured by the internal thermistor 31 and the external platinum resistance 32 (ie T 热 with T 2 difference), and the measured value T of the standard blackbody (34° C.) by the infrared thermopile sensor 22 34℃ .

[0084] S3: Next, set the incubator at 25°C+n°C (n=1, 2...10)...

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Abstract

The invention discloses an infrared body temperature screening instrument which comprises a shell, an infrared detection mechanism, a thermosensitive detection mechanism, a wind speed measurement mechanism, an ultrasonic detection mechanism and a control mechanism. An emission port is formed in one side of the shell; one end of the wind speed measurement mechanism is arranged outside the shell, and the other end of the wind speed measurement mechanism is electrically connected with PC equipment; the infrared detection mechanism is arranged at one end, close to the transmitting port, in the shell, so that the infrared detection mechanism receives infrared radiation through the transmitting port; the thermosensitive detection mechanism and the infrared detection mechanism are arranged adjacently; one end of the ultrasonic detection mechanism is arranged in the shell and is electrically connected with the PC equipment, and the other end of the ultrasonic detection mechanism and the axis of the infrared detection mechanism penetrate through the shell in parallel; and the thermosensitive detection mechanism and the infrared detection mechanism are electrically connected with the PC equipment through the control mechanism respectively. Parameters such as airflow velocity, measurement distance and measurement angle are collected, and accurate measurement of human body temperature is realized.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to an infrared body temperature screening instrument and a calibration method. Background technique [0002] Body temperature detection is a key point in the prevention and control of the new crown pneumonia epidemic. Infrared body temperature screening instruments are widely used in public places with dense population and high flow of people. [0003] At present, most of the infrared body temperature screening instruments adopt the method of fixed position and fixed point measurement, that is, the person to be measured must stand at the specified position to perform the measurement. Such a measurement method greatly limits the efficiency of the measurement, and the person to be measured must stand still at the specified position to complete the measurement. At the same time, since the subjects tend to enter the field of view from different directions, and the heights of different ...

Claims

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Application Information

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IPC IPC(8): G01J5/00G01J5/02G01J5/52
CPCG01J5/0025G01J5/0275G01J5/53G01J5/80
Inventor 纪金龙洪丽君陈炯宇沈在钦谢学江欧伟彬吕艺晖
Owner 厦门市计量检定测试院
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