Summary
This study investigates how measurement distance and spatial resolution affect drone-based infrared detection (DID) of abnormal temperature rise in composite insulators, aiming to optimize field inspection parameters. Laboratory tests show that temperature rise stabilizes within ~10 minutes for artificial defects and aged housings, but requires over 20 minutes for core-rod decay-like degradation and severe bonding defects. Increasing detection distance reduces image clarity and measured temperature amplitude; excessive distance causes measurement distortion. Recommended maximum detection distances are ≤10 m for devices with 0.895 mrad and 0.68 mrad spatial resolution, and ≤20 m for 0.34 mrad resolution. An indirect distance control method based on the insulator's frame height ratio is proposed. This study provides practical guidance for standardizing UAV-based infrared inspection procedures.
Read more Read lessQuantitative understanding of how measurement distance and viewing angle affect IRT results is essential for optimizing field DID distance selection.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_11586_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | China, People's Republic of |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
LI Te - State Grid Zhejiang Electric Power Co Electric Power Research Institute; ZUO Zhou - Tsinghua University; LIANG Xidong - Tsinghua University; TAO Ruixiang - State Grid Zhejiang Electric Power Co Electric Power Research Institute; WU Chao - Tsinghua University; LIU Shuqi - Tsinghua University; ZHANG Rui - China Electric Power Research Institute; WANG Shaohua - State Grid Zhejiang Electric Power Co Electric Power Research Institute
Keywords
Composite insulator, decay-like fracture, degradation, unmanned aerial vehicle, infrared thermography
