Quick answer
The Blade Radar-Vision Clearance Monitoring System (HZSN-RVBC-3000) fuses machine vision with 80 GHz FMCW millimetre-wave radar to measure wind turbine blade-tip-to-tower clearance in almost all weather. Vision performs reliably in rain, radar performs reliably in fog, and the fused result gives 98% operating-weather coverage at 50 cm accuracy, streamed to the turbine controller at 50 Hz over CANopen, Modbus or Profibus.
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement accuracy | 50 cm |
| Measuring range | >= 130 m |
| Availability | >= 98% |
| Output frequency | 50 Hz |
| Radar frequency | 80 GHz FMCW |
| Range accuracy | +/- 0.2 m |
| Protection rating | IP65 outside nacelle / IP54 inside nacelle |
| Operating temperature | -40 to 65 C |
| Communication | CANopen / Modbus TCP / Modbus RTU / Profibus-DP |
Overview
Single-sensor clearance systems each have a blind spot. Camera-based vision degrades in dense fog, snow and heavy precipitation, while radar alone provides distance but no visual confirmation and no defect context. On sites where weather downtime would leave the turbine unprotected, that blind spot is unacceptable.
The HZSN-RVBC-3000 removes it by running both modalities in parallel and fusing them. The video channel works in rain; the mmWave channel works in fog. The fused clearance value, together with a recognised weather state, is sent to the turbine controller so protection logic always has a valid input. Radar and video point clouds from three minutes before and after any hazardous clearance event are retained for analysis.
How it works
- Sense: an 80 GHz FMCW radar and nacelle cameras measure the blade pass simultaneously.
- Fuse: the fusion algorithm weights each channel by current weather state and outputs one clearance value.
- Classify: weather-state recognition is passed to the controller as a feature value alongside clearance.
- Predict: rotor aerodynamic imbalance is assessed and short-term clearance is predicted.
- Protect: the controller feathers or shuts down the turbine when fused clearance crosses the threshold.
Key features
- Dual-modality fused clearance calculation: video plus millimetre-wave radar
- 98% operating-weather coverage; applicable except for dense fog combined with rain and snow
- Measuring range of at least 130 m with 50 cm accuracy
- Weather-state recognition with feature values sent to the controller
- Rotor aerodynamic imbalance assessment and clearance prediction
- Storage of video and radar point clouds 3 minutes before and after hazardous clearance
- Camera wiper plus self-cleaning spray system
Applications
Fog-prone coastal and offshore sites
Radar keeps measuring when visibility collapses, making the system suitable for North Sea, Baltic and other fog-heavy wind regions.
Snow and icing climates
Operates to -40 C with heated optics, wiper and self-cleaning spray.
Very large rotors
A measuring range of at least 130 m covers the longest onshore and offshore blades in service.
Fleet-wide standard protection
One hardware variant covers most weather profiles, simplifying spares and technician training across a mixed fleet.
Frequently asked questions
What is the difference between video clearance and radar-vision clearance monitoring?
Which wind turbine clearance monitoring system is best for foggy sites?
What is the measuring range and accuracy?
Which industrial protocols are supported for controller integration?
Does the system record evidence after an incident?
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