DIC Technology for Measuring Fan Blade Deformation with SinceVision 8000FPS High-Speed Camera

1. Project Background

Understanding how materials deform and fail under extreme conditions, like high-speed rotation, is key for the safety and efficiency of rotating machinery. Traditional contact methods, like strain gauges, give only single-point data. They can also face interference, which makes them unfit for complex, dynamic structures.

Digital Image Correlation (DIC) technology provides a non-contact way to measure. It captures detailed deformation data across an entire field. In this study, we chose fan blades to test how well DIC works in engineering. These blades handle complex loads and are crucial for safety in aerospace and power generation systems.

Image: Preparation of speckle pattern on fan blades

2. Experimental Setup

a. Hardware Configuration

The system used two SinceVision SH3-108 high-speed cameras. They operated at 8000 frames per second (fps) and with a full-frame resolution of 1280×1024. The cameras were set at exact angles. This created a stable, overlapping stereo view of the spinning fan blades. It ensured accurate 3D deformation reconstruction while in motion.

b. Sample Preparation and Marking

To prepare for DIC analysis, we painted the fan blade surfaces with a random speckle pattern. We used high-contrast paint for this. The measurement areas were divided into six zones, designated as Stage Rectangles 0–5. These zones cover the root, middle, and tip sections of the blade. This layout enabled detailed observation of strain gradients across the entire span.

3. Experimental Results and Analysis

a. Full-Field Strain Distribution (Spatial Dimension)

The DIC analysis generated full-field strain contour maps, where color variations represented different strain levels in microstrain (µε). Warm colors indicated regions of tensile strain, while cool colors corresponded to compressive zones.

Results revealed a distinct strain gradient extending from the blade tip to the root. The tip region showed greater tensile strain due to centrifugal forces during rotation. In contrast, the root area experienced both tensile and compressive strain, which aligns with the structural limits at the hub.

b. Strain Time Response (Dynamic Dimension)

The strain–time curves showed regular oscillations that matched the blade’s rotation speed. The tip showed larger peaks, meaning it had stronger tensile deformation. The root, on the other hand, had smaller peaks and sometimes reacted with compression. These findings confirm the DIC system’s ability to capture transient strain behavior in real time.

c. Structural Stress Evaluation

The experimental strain distribution aligned closely with theoretical predictions for centrifugal loading. No abnormal or excessive strain values were found in the blade structure. This shows that the mechanical design was sturdy and stable under changing conditions.

4. Technical Value and Application Prospects

This case shows the strong technical benefits of using SinceVision high-speed cameras with DIC for better structural analysis.

l Non-contact full-field measurement: Overcomes the limitations of single-point strain gauges.

l High spatiotemporal resolution: Captures deformation dynamics at 8000 fps with 50 µε precision.

l Reliable quantitative results: Enables accurate correlation of spatial and temporal deformation data.

This integrated system goes beyond fan blade analysis. It applies well in several areas, such as aero-engine blade testing, automotive turbine analysis, and evaluating bridge wind resistance. The approach lays the groundwork for accuracy in engineering research. It also aids in fault prediction and improves structural design optimization.

Featured Product: SinceVision SH3-108 High-Speed Camera

The SinceVision SH3-108 high-speed camera offers great performance and accuracy for dynamic testing and engineering research. It captures ultra-fast events with high clarity. This gives engineers the data they need for accurate analysis of transient mechanical behaviors, like deformation, vibration, and impact response.

a. Core Performance Specifications

The SH3-108 has a full-frame resolution of 1280×1024 pixels. It records at 8000 frames per second (fps). This ensures clear visuals of quick structural changes. The camera has a minimum exposure time of 100 nanoseconds. It uses a PIV double exposure interval of 210 nanoseconds. This setup effectively freezes fast motion and eliminates motion blur. Its 14.6 μm pixel size boosts sensitivity and reduces noise. This gives sharp, high-contrast images, even in tough lighting.

b. Physical Design & Durability

Compact and robust, the SH3-108 is engineered for reliability in demanding environments. The camera measures 99D × 110W × 110H mm. It has a tough body that can handle 200g impacts. This makes it great for both labs and industrial settings. Its smart size-to-heat design keeps things stable during long recordings. Plus, its small shape makes it easy to fit into complex testing setups.

c. Internal Technology & Storage

The SH3-108 features advanced hardware. It uses a 20-layer PCB and 10Gbps SerDes technology. This ensures ultra-fast data transfer and real-time signal integrity. Its self-developed array parallel storage system allows for fast and lossless data handling. This ensures that no important frame is missed during acquisition. The system allows for storage expansion up to 4TB. This enables long recording sessions with high frame rates. Data integrity remains intact.

The design elements of the SinceVision SH3-108 make it a strong tool for engineers and researchers. It excels in high-speed imaging, deformation measurement, and dynamic component analysis. This is useful in aerospace, automotive, and industrial applications.

Conclusion

SinceVision’s SH3-108 high-speed camera works with DIC technology. This combo gives engineers and researchers a precise and efficient way to measure dynamic deformation. It allows us to see how strain changes across rotating structures. This connects theory with real-world performance.

If you struggle with high-speed transient phenomena, reach out to our experts here. We offer customized solutions and free demo trials. Don’t let any critical moment go unseen!