Full-field measurement and reconstruction method for turbine blade strain field based on dual-mode fusion

A measurement and reconstruction method for a turbine blade strain field based on fusion of an imaging technology and an infrared photoelectric measurement technology, comprising steps of:

• using the imaging technology to perform digital image measurement and treatment on a strain of a blade surface area, and calculating a displacement change of the blade surface area based on blade surface feature points;
• using the infrared photoelectric measurement technology to collect infrared radiation signals at blade edges, and identifying a displacement change of the blade edges at different temperatures based on radiation intensity differences between blades and blade gaps;
• fusing data measured by the two technologies through interpolation to obtain a target blade overall displacement change distribution under a specific working condition, and reconstructing a blade full-field strain, wherein the two measurements are performed independently with one dual-mode probe.