Infrared thermometer negative temperature calibration device and calibration method
A technology for infrared thermometers and calibration devices, which is applied to measuring devices, radiation pyrometry, instruments, etc., can solve problems such as poor uniformity and stability of the temperature field, easy freezing of black bodies, and destruction of black body temperature fields, etc., to achieve The structure design is reasonable and ingenious, the use cost is low, and the effect of improving the calibration efficiency
Active Publication Date: 2020-05-29
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 an infrared thermometer negative temperature calibration device. The negative temperature calibration device comprises a constant-temperature alcohol tank and a black body cavity device arranged corresponding to the constant-temperature alcohol tank, wherein the blackbody cavity device comprises a blackbody cavity arranged in the constant-temperature alcohol tank and an alcohol tank panel connected with an opening end of the blackbody cavity, a panel bayonet is arranged on the constant-temperature alcohol tank, and the alcohol tank panel is clamped on the constant-temperature alcohol tank corresponding to the panel bayonet. The invention further discloses an infrared thermometer low-temperature section calibration method. The infrared thermometer calibration deviceis reasonable and ingenious in structural design, high in stability and high in precision, when an infrared thermometer is calibrated, temperature calibration of the infrared thermometer can be implemented only by aligning the infrared thermometer with the black body cavity, the infrared thermometer calibration device is convenient to use, a problem that the blackbody temperature field is damagedand cannot be continuously used due to freezing crystals caused by long-time use is solved, and compared with a nitrogen filling mode, resource waste cannot be caused, use cost is lower, and automaticintelligent manufacturing of the infrared thermometer is facilitated.
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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Login to View More 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