METHOD AND APPARATUS FOR TESTING BLADED ROTORS

摘要

To test rotating bladed rotors, an optical image is formed of each successive blade-tip as it passes a selected azimuth. Electro-optical apparatus derives signals related to the relative positions of the successive images. These signals are displayed to provide a measure of the relative axial displacements of the several blades. Electrical means are provided for calibration of the axial distances being measured and for identifying each particular blade with the corresponding displacement indication.