Read infrared thermal delta-T from ambient temp and emissivity.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Radiometric temperature measurement | W = εσT⁴ Stefan-Boltzmann | Stefan-Boltzmann |
| Emissivity | Metals 0.2–0.6, non-metals 0.8–0.95 | IR thermography |
| Delta T criteria | ΔT >10 K abnormal for joints | GB/T 19870-2005 |
| Reflected temperature | Reflected temperature compensation | IR inspection practice |
| Atmospheric attenuation | Attenuation rises with distance/humidity | IR engineering |
| Inspection procedure | Test at ≥30% load | DL/T 664-2016 |
红外热成像温差判读工具,综合环境温度、目标发射率、检测距离与热像仪 NETD,估算最小可分辨温差 MRTD 及发射率引起的测温误差,辅助红外检测判读。