Human body infrared temperature measurement superconducting tube surface source blackbody calibration source system

Abstract

The invention discloses a human body infrared temperature measurement superconducting heat pipe blackbody target plate surface source calibration source system specially used for human body temperature measurement. Superimposed black body target plate semiconductor cooler, black body target plate heater and black body target plate semiconductor cooler are powered by heating and cooling power supply circuit, heating and cooling power supply circuit is electrically connected to RTD temperature measurement control circuit, RTD temperature measurement control circuit passes The engineering mode performs system-level temperature measurement curve fitting and precision compensation calibration on its interior to achieve high-precision measurement of ±0.1 degrees Celsius and high stability of ±0.3 degrees; superconducting heat pipe blackbody target plate, target plate heater, heating and cooling The integrated components of chip, power supply and control circuit and RTD temperature measurement and control circuit can quickly realize quick startup and quick calibration in the process of rapid installation and deployment, and can gradually improve the high-precision temperature measurement performance in the process of system operation through multi-cycle interaction.

Description

technical field [0001] The invention belongs to the field of body temperature measurement equipment, and in particular relates to a calibration source system used for an infrared temperature measurement system of a human body. Background technique [0002] In the field of health and epidemic prevention, patients with more serious diseases caused by viruses such as Ebola virus (Ebola), 2019 new coronavirus (2019-nCoV) Middle East respiratory syndrome (MERS) and severe acute respiratory syndrome (SARS) have The body has fever and fever, and the patient has a high risk of high infection at this time. Therefore, the infrared thermal imaging body temperature monitoring system is used to detect human body temperature in dense crowds, so as to detect, warn and select potential infectious agents. It is a method. an effective way to control the epidemic. However, the temperature accuracy of conventional infrared thermal imaging technology equipment is poor, and calibration is requir...

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Problems solved by technology

In addition, environmental data (such as measurement distance and ambient temperature and humidity parameters) will also affect the measurement results. Conventional black body source equipment cannot provide comprehensive information for the use of such temperature measurement equipment, and because black bodies are generally limited to laboratory environments, or more rigorous Widely used for scientific research, so there are the following problems:

[0004] 1. The design goal of the conventional blackbody source is not specially developed for the purpose of infrared human body testing. The temperature range of the blackbody source is from +10 to +100 degrees Celsius, and can even reach -20 to +400 degrees Celsius or wider. The general temperature accuracy is >±1 to 2 degrees Celsius, stability >±0.3 to 0.5 degrees, the temperature is within the range of +30 to +42 degrees Celsius measured by the core temperature of the human body, and the measurement results with a temperature deviation of 1 to 2 degrees may lead to misjudgment. The accuracy and stability in the range are not ideal

[0005] 2. It is difficult for the temperature of the black body source to reach the set value quickly and keep it stable for a period of time after starting up. The normal process takes 1 to 5 minutes, and the temperature cannot be used as a reference value during this period.

[0006] 3. Conventional infrared thermal imaging human body temperature measurement systems generally have no direct connection or data communication with the black body source. It is difficult to realize automatic calibration of the infrared thermal imaging human body temperature measurement system, and it is also impossible to continuously use the black body to achieve continuous and real-time temperature calibration. Inconvenient to use

[0007] 4. Due to the temperature deviation of the measurement environment, the infrared thermal imaging human body temperature measurement system does not have a reliable relative temperature measurement value in the image data of the measurement results. It is also difficult to judge whether the measurement results are accurate in the later data and infrared images, and relies heavily on blackbody calibration The original accuracy of the source, the rigor of the calibration process, and the reliability and accuracy of the low-cost infrared thermal imaging human body temperature measurement system

[0009] 6. The distance of the black body affects the temperature measurement accuracy. The conventional black body is small in size and has no special shape. It is used for image recognition of infrared thermal imagers for accurate size reading and conversion into distance parameters to reduce temperature reading errors.

[0010] 7. The black body has become an essential calibration device in the low-cost infrared thermal imaging human body temperature measurement system. Otherwise, the measurement results will have large deviations, and the measurement results will be less reliable and unreliable. However, the cost of conventional black body source equipment is high and expensive The actual application scale and scenarios are limited, and the public epidemic prevention expenditure is relatively high;

[0011] 8. The volume is too large and heavy, and it is inconvenient to install and fix, so it is not suitable for mobile or quick deployment.

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