Probe design for measuring high-reflective surface

Turbine blade is high-reflective metal surface, which has much difficulty in measurement. Based on vision measurement technique and the metal superficial polarization characteristic, the probe system with three cameras is developed. On the basis of geometry model, the impacts of structure parameters on vertical resolution ratio of the system are analyzed and the parameters are designed, which offer the theoretical foundation of sculptured high accuracy surface measurement online. In measurement, the CCD calibration is very important. Combining with Tsai algorithm, the camera model is built, the uncertainty image scale factor sx scan be got, and the other parameters can be received easily. With the method of the paper, the experiment of high-reflective surface measurement of gauge block is carried on. The results indicate that the measuring device has high measurement accuracy, which can be widely used in practice.