BladeTrackers inspection pattern is unique.
Our technology allows us to position the camera relatively close to the turbine. As a general rule of thumb, we maintain a horizontal distance to the turbine equal to the hub height, ensuring a 45-degree angle with the hub. Since we position the camera close to the turbine, the upper section of the blade's rotation is not relevant to our observations.A BladeTracker survey starts with selecting a blade. Per rotation, 2 images are captured from the lower part of the rotation.
After the first pair is captured (1A-1B), BladeTracker moves up to capture the next pair of images (2A-2B), slightly overlapping with the previous one. This process is repeated until the hub is reached. Full coverage is reached, but the images from the A-serie have an emphasis on the leading edge, the images from the B-serie have an emphasis on the trailing edge. An alternative sequence can be capture upon request.
When capturing the images, the horizontal and vertical angle of the camera is recorded to facilitate photogrammetry.
The principles of reporting can be found here.
Alternatively, customers can choose for a quick intermediate leading edge inspection instead.