Unmanned Aerial Vehicle (UAV) inspection of 220kV tension towers plays a vital role in ensuring the safety and reliability of high-voltage power transmission lines. Through high-resolution imaging and intelligent flight path planning, UAVs enable precise observation of key components such as insulators, fittings, and conductors. This inspection standard outlines the critical checkpoints, photographic requirements, and evaluation criteria to ensure that all captured images provide clear, measurable data for defect detection, maintenance assessment, and long-term asset management.
| Serial Number | Inspection points | Shooting quality requirements | Software checkpoint screenshot | Real Inspection Point Images |
|---|---|---|---|---|
| 1 | Tower Overview | The entire tower structure should be visible, clearly distinguishing tower materials and angles. The main structure (top to bottom) should occupy at least 80% of the image frame. |  | |
| 2 | Tower Head | The top part of the tower should be fully visible. |  | |
| 3 | Tower Body | The entire body of the tower should be visible, excluding the tower head and base area. |  | |
| 4 | Pole Number Plate | The pole number plate should be clearly readable, showing dual line names. |  | |
| 5 | Tower Base and Ground | The area surrounding the tower base and nearby ground conditions should be clearly visible. |  | |
| 6 | Left Phase – Small Conductor Side – Conductor Suspension Point | Bolts, nuts, locking pins, and small-size fittings should be clearly visible, as well as vibration dampers. When components block each other, capture from multiple angles. Each photo must include at least one insulator disk. |  | |
| 7 | Left Phase – Small Conductor Side – Insulator String | The entire insulator string should be covered. Multiple photos may be taken. The final image must clearly show surface damage and the connection of each insulator disk. |  | |
| 8 | Left Phase – Small Conductor Side – Crossarm Suspension Point | Bolts, nuts, locking pins, and small-size fittings should be clearly visible. When components block each other, capture from multiple angles. Each photo must include at least one insulator disk. |  | |
| 9 | Left Phase – Jumper – Crossarm Suspension Point | Bolts, nuts, locking pins, and small-size fittings should be clearly visible. Capture from multiple angles if components block each other. Each photo must include at least one insulator disk. |  | |
| 10 | Left Phase – Jumper – Insulator String | The entire insulator string should be covered. Multiple photos may be taken. The final image must clearly show surface damage and each insulator disk’s connection. |  | |
| 11 | Left Phase – Jumper – Conductor Suspension Point | Bolts, nuts, locking pins, and small-size fittings (including vibration dampers) should be clearly visible. Capture from multiple angles when equipment obstructs the view. Each photo must include at least one insulator disk. |  | |
| 12 | Left Phase – Large Conductor Side – Crossarm Suspension Point | Bolts, nuts, and locking pins should be clearly visible. Capture from multiple angles if components block each other. Each photo must include at least one insulator disk. |  | |
| 13 | Left Phase – Large Conductor Side – Insulator String | The entire insulator string should be covered. Multiple photos may be taken to clearly identify surface damage and disk connections. |  | |
| 14 | Left Phase – Large Conductor Side – Conductor Suspension Point | Bolts, nuts, locking pins, and small-size fittings (including vibration dampers) should be clearly visible. Capture from multiple angles when equipment blocks the view. Each photo must include at least one insulator disk. |  | |
| 15 | Middle Phase – Small Conductor Side – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles when components overlap. Each photo must include at least one insulator disk. |  | |
| 16 | Middle Phase – Small Conductor Side – Insulator String | The entire insulator string should be captured. Multiple photos may be taken. The final image should clearly show surface damage and each insulator disk’s connection. |  | |
| 17 | Middle Phase – Small Conductor Side – Crossarm Suspension Point | Bolts, nuts, locking pins, and small-size fittings should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 18 | Middle Phase – Large Conductor Side – Crossarm Suspension Point | Bolts, nuts, locking pins, and small-size fittings should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 19 | Middle Phase – Large Conductor Side – Insulator String | The entire insulator string should be covered. Multiple photos may be taken. The final image must clearly show surface damage and disk connections. |  | |
| 20 | Middle Phase – Large Conductor Side – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 21 | Left Ground Wire | The combination state of fittings and the installation condition of the aluminum wrapping tape at the contact point with the ground wire should be visible. Bolts, nuts, and locking positions should be clearly identified. Capture from multiple angles if obstructed. |  | |
| 22 | Right Ground Wire | Same as left: clearly show the fittings, wrapping tape installation, and locking positions of nuts and bolts. Capture from multiple angles if obstructed. |  | |
| 23 | Middle Phase – Left Jumper – Crossarm Suspension Point | Bolts, nuts, and locking pins should be visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 24 | Middle Phase – Left Jumper – Insulator String | The entire insulator string should be captured. Multiple photos may be taken. The final image must clearly show surface damage and disk connections. |  | |
| 25 | Middle Phase – Left Jumper – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles when obstructed. Each photo must include at least one insulator disk. |  | |
| 26 | Middle Phase – Right Jumper – Crossarm Suspension Point | Bolts, nuts, locking pins, and small-size fittings should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 27 | Middle Phase – Right Jumper – Insulator String | The entire insulator string should be covered. Multiple photos may be taken. The final image must clearly show surface damage and connections. |  | |
| 28 | Middle Phase – Right Jumper – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 29 | Right Phase – Small Conductor Side – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 30 | Right Phase – Small Conductor Side – Insulator String | The entire insulator string should be captured. Multiple photos may be taken. The final image must clearly show surface damage and connections. |  | |
| 31 | Right Phase – Small Conductor Side – Crossarm Suspension Point | Bolts, nuts, and locking pins should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 32 | Right Phase – Jumper – Crossarm Suspension Point | Bolts, nuts, and locking pins should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 33 | Right Phase – Jumper – Insulator String | The entire insulator string should be covered. Multiple photos may be taken. The final image must clearly show surface damage and connections. |  | |
| 34 | Right Phase – Jumper – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 35 | Right Phase – Large Conductor Side – Crossarm Suspension Point | Bolts, nuts, and locking pins should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 36 | Right Phase – Large Conductor Side – Insulator String | The entire insulator string should be covered. Multiple photos may be taken. The final image must clearly show surface damage and connections. |  | |
| 37 | Right Phase – Large Conductor Side – Conductor Suspension Point | Bolts, nuts, locking pins, and vibration dampers should be clearly visible. Capture from multiple angles if obstructed. Each photo must include at least one insulator disk. |  | |
| 38 | Small Conductor Side – Corridor | The tower corridor should be clearly visible, including nearby structures, vegetation, crossing lines, and other surrounding conditions. |  | |
| 39 | Large Conductor Side – Corridor | The tower corridor should be clearly visible, including nearby structures, vegetation, crossing lines, and other surrounding conditions. |  |
