Negative temperature calibration device and calibration method for infrared thermometer
A technology for infrared thermometers and calibration methods, applied in measuring devices, radiation pyrometry, instruments, etc., can solve problems such as poor uniformity and stability of the temperature field, damage to the black body temperature field, and inability to continue to use, etc., to achieve structural design Reasonable and ingenious, improve calibration efficiency, and facilitate the effect of automated intelligent manufacturing
Active Publication Date: 2022-02-08
UNI TREND TECH (CHINA) CO LTD
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Problems solved by technology
[0003] The accuracy of non-contact infrared thermometers on the market at -50°C to 0°C is relatively low, basically between ±3°C and ±5°C, resulting in the inability to improve the accuracy of non-contact infrared thermometers in the negative temperature range The main reason is that the uniformity and stability of the temperature field of the existing low-temperature blackbody radiation source are relatively poor, especially during long-term use, the blackbody is prone to freeze crystals, which will damage the blackbody temperature field and cannot continue to be used, even if the nitrogen filling method is used , it can only be short-lived, and it is a waste of resources, and the price is also expensive. It has become a bottleneck station for the automatic intelligent manufacturing of infrared thermometers.
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[0032] Examples, see Figure 1 to Figure 7 A negative temperature calibration device for an infrared thermometer provided in this embodiment includes: a constant temperature alcohol tank 1 and a black body cavity device corresponding to the constant temperature alcohol tank 1; the black body cavity device includes a constant temperature alcohol tank 1 The inner black body cavity 21, and the alcohol tank panel 22 connected with the opening end of the black body cavity 21; said constant temperature alcohol tank 1 is provided with a panel bayonet, and said alcohol tank panel 22 is clamped corresponding to the panel bayonet On the constant temperature alcohol tank 1.
[0033] Specifically, under standard air pressure, the lowest freezing point of alcohol is -117°C. Using the characteristics of its low freezing point, the constant temperature alcohol tank 1 is used to ensure the constant temperature; The constant temperature of the infrared thermometer is consistent, and then when...
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The invention discloses a negative temperature calibration device for an infrared thermometer, comprising: a constant temperature alcohol tank and a black body cavity device corresponding to the constant temperature alcohol tank; the black body cavity device includes a black body cavity placed in the constant temperature alcohol tank, And the alcohol tank panel connected to the opening end of the black body cavity; the constant temperature alcohol tank is provided with a panel bayonet, and the alcohol tank panel is placed on the constant temperature alcohol tank corresponding to the panel bayonet. The invention also discloses a method for calibrating the low-temperature section of an infrared thermometer; the structure design of the invention is reasonable and ingenious, with high stability and high precision. When calibrating the infrared thermometer, it is only necessary to align the infrared thermometer with the black body cavity The temperature calibration of the infrared thermometer can be implemented, and it is easy to use; there will be no ice crystals caused by long-term use, which will cause the black body temperature field to be damaged and cannot continue to be used; and compared with the nitrogen filling method, it will not It causes a waste of resources, and the cost of use is also lower, which is conducive to the automatic and intelligent manufacturing of infrared thermometers.
Description
technical field [0001] The invention relates to the field of infrared thermometer production, in particular to a negative temperature calibration device and calibration method for an infrared thermometer. Background technique [0002] In the production process, infrared temperature measurement technology plays an important role in product quality control and monitoring, equipment online fault diagnosis and safety protection, and energy saving. In the past 20 years, the non-contact infrared human body thermometer has developed rapidly in technology, its performance has been continuously improved, its functions have been continuously enhanced, its varieties have continued to increase, and its scope of application has also continued to expand. Compared with contact temperature measurement methods, infrared temperature measurement has the advantages of fast response time, non-contact, safe use and long service life. However, the accuracy of infrared thermometers is closely rela...
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IPC IPC(8): G01J5/00G01J5/52
CPCG01J5/00G01J5/53G01J5/80
Inventor佘尊华吕伟蔡伟明陈闰
OwnerUNI TREND TECH (CHINA) CO LTD