Quick answer
The Rotor Imbalance Offline Detection System (HZSN-ROBD-2000) is a portable, ground-based video instrument that detects blade zero-degree deviation and rotor aerodynamic imbalance on wind turbines. Filming the rotor from the tower base and comparing the clearance variation of all three blades, it resolves clearance to 20 cm at 5 cm resolution, grades imbalance as mild or severe, and generates a Word inspection report automatically. The unit is self-powered for six hours and requires no turbine shutdown or power derating.
Technical Specifications
| Parameter | Value |
|---|---|
| Accuracy | 20 cm |
| Clearance measuring range | 0 to 20 m |
| Resolution | 5 cm |
| Endurance | 6 hours |
| Display | 14-inch industrial touchscreen |
| Storage | >= 250 GB SSD |
| Camera | 4 MP, 1080P, H.265 |
| Operating temperature | -20 to 55 C |
| Weather suitability | Clear / light rain / light snow / thin fog |
Overview
Blade-to-blade aerodynamic imbalance is one of the most under-diagnosed causes of lost production and premature drivetrain wear. When one blade sits at a different pitch angle from its neighbours, the rotor is unbalanced: output drops, loads rise, and the imbalance is often invisible from SCADA data.
The HZSN-ROBD-2000 detects it without climbing the tower. An operator sets a 4 MP camera at the tower base, films the rotating blades, and the software compares the clearance variation across the three blades to identify which blade deviates and by how much. Rotor speed is calculated in real time to within 1 rpm, abnormal yaw and rotor speed trigger automatic warnings, and a Word-format report is produced on the spot. With six hours of battery endurance, a technician can survey an entire wind farm in a single visit.
How it works
- Set up: the camera tripod is placed at the tower base; no turbine access is needed.
- Film: a 4 MP H.265 camera records the rotor against the sky.
- Compare: software tracks each blade and compares clearance variation between the three blades.
- Grade: rotor aerodynamic imbalance is classified as mild or severe.
- Report: a Word-format inspection report is generated automatically for the O&M record.
Key features
- Offline blade-clearance detection and assessment
- Rotor aerodynamic imbalance detection with mild / severe grading
- Real-time rotor-speed calculation with deviation of 1 rpm or less
- 6-hour self-powered endurance, recharged from 220 V
- Automatic warning for abnormal yaw or rotor speed
- Automatic Word-format inspection report
- Premium configuration supports drone high-altitude filming
Applications
Fleet-wide imbalance screening
Six-hour battery life and no shutdown requirement make it practical to screen every turbine in a wind farm during a single campaign.
Post-repair and post-retrofit verification
Confirm that blade pitch angles match after a blade replacement, tip repair or leading-edge protection retrofit.
Underperforming-turbine diagnosis
Isolate whether a production shortfall is caused by pitch deviation rather than by control settings or resource variation.
Warranty and handover inspection
Generate signed Word reports for end-of-warranty inspections and owner handovers.
Frequently asked questions
What is blade zero-degree deviation?
Does the turbine need to be shut down for the inspection?
How accurate is the rotor imbalance measurement?
How many turbines can be inspected on one battery charge?
Can the system be used with a drone instead of a ground camera?
Request a datasheet or quotation
Tell us your turbine model and fleet size. We reply within one business day.
