Abstract
This paper discusses a solution to the problem of monitoring the sizes of working steam-turbine blades, using a videoendoscopy system in the barring mode. The relationships of the optical system’s parameters with the shape, size, and speed of the working blades are determined for a significant depth of field. A method and an algorithm are proposed for processing digital images. The paper discusses the error components of monitoring the chord size of the working blades during the processing of digital images obtained as the rotor rotates. The characteristics of a prototype of the system are experimentally studied, using a physical model of the peripheral part of the blade system of a K-1200-6.8/50 steam turbine. Ways are proposed to weaken the influence of the error components of the videoendoscopy system.
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