GB/T 19870-2018 in English
VALIDIndustrial inspecting thermal imagers
- Issued on:2018-05-14
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 19870-2018工业检测型红外热像仪》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC1（全国工业过程测量控制和自动化标准化技术委员会温度、流量、机械量、物位、显示仪表、执行器和结构装置分会）执行，主管部门为中国机械工业联合会。
Introduction
In-depth interpretation of GB/T 19870—2018 Industrial detection infrared thermal imager standard
1. Standard overview
The National Standard of the People's Republic of China GB/T 19870—2018 "Industrial detection infrared thermal imager" (hereinafter referred to as "this standard") replaces the old standard GB/T19870—2005. This standard applies to industrial detection infrared thermal imagers (hereinafter referred to as "thermal imagers") used in the power, metallurgy, coal mining and petrochemical industries, and standardizes their terms and definitions, product classification and basic parameters, technical requirements, test methods and inspection rules.
2. Comparison of standard frameworks
| Old version of the standard GB/T 19870—2005 | New version of the standard GB/T 19870—2018 | Comparison description |
|---|---|---|
| The terms “minimum resolvable temperature difference” and “characteristic spatial frequency” are not defined | The terms and definitions of “minimum resolvable temperature difference” (MRTD) and “characteristic spatial frequency” are added (see 3.13 and 3.14) | New technical parameters are added to improve the detection sensitivity requirements |
| The classification method is not clear | “Classification according to the type of detector” is added (see 4.2) | The classification is more detailed and more targeted |
| Drop test requirements are not involved | The requirements and test methods for "drop test" have been added (see 6.2.5 and 7.2.10.8) | Enhance the environmental adaptability of the equipment |
3. Interpretation of core technical requirements
Spatial resolution: The ability of the thermal imager to distinguish the details of the spatial geometric shape of an object. It is related to the size of the detector pixel area, the focal length of the optical system and the bandwidth of the signal processing circuit. The calculation formula is: Spatial resolution = [2π × horizontal field of view angle (°)] / (360° × number of horizontal pixels), in radians (rad).
Temperature measurement range: The range of temperature that the thermal imager can measure while meeting accuracy conditions. Generally, it can be selected within the range of -40°C ~ +2000°C.
4. Test methods and inspection rules
Environmental adaptability test: Including high temperature storage, low temperature storage, damp heat, vibration and drop tests. Taking high temperature storage as an example, the test temperature is 60°C and the test time is 16 hours.
Electromagnetic compatibility requirements: Thermal imagers should meet the requirements of immunity and emission limits. For specific methods, please refer to GB/T18268.1-2010.
5. Implementation suggestions
Selection suggestions: Choose the appropriate product type according to the application scenario. For example, for long-distance observation, a thermal imager with a spatial resolution of 0.2 mrad ~ 0.7 mrad can be selected; for high-speed moving targets, a model with a sampling frame rate of 50 Hz or above should be selected.
Maintenance Recommendations: Regularly check the housing protection performance of the equipment to ensure that it meets the IP grade requirements specified in GB/T4208-2017. At the same time, it is recommended to conduct a comprehensive calibration and environmental adaptability test once a year to ensure measurement accuracy.
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