Three-dimensional measuring method of propeller pitch

Abstract

The three-dimensional measurement process of the propeller pitch of the present invention comprises the following steps: A. drawing a straight line on the platform; B. placing the propeller vertically in the central area of ​​the line; C. using the pitch plan to draw out the different radii of each blade Radiation included angle and marking; D. Set up a total station, collect the first and last ends of the line that has been mapped to establish a spatial coordinate system; E. Measure the space position of the center of the upper end surface of the propeller blade as the reference for pitch measurement; F. Paste reflective sheets at the measurement points , measure the radial angle three-coordinate data of each propeller blade different radii that the pitch gauge surveys and delimits in turn; G, proofread and mark the accuracy of mapping; H, measure the radial angle mark spatial position at each propeller blade different radii; I , Calculate the local pitch and section pitch of the propeller. The invention can not only realize the high-precision pitch measurement of fixed-pitch propellers, variable-pitch propellers and adjustable-pitch propellers, but also reduce the outsourcing cost of propeller pitch measurement in shipyards, shorten the ship repair period, and significantly improve work efficiency.

Description

technical field [0001] The invention relates to a process method for three-dimensional measurement of propeller pitch. Background technique [0002] At present, the methods for measuring propeller pitch mainly include traditional manual measurement, scanner measurement and camera measurement. Traditional manual measurement needs to make corresponding measurement tooling for different propellers. Since the whole process is manual operation, the measurement accuracy is poor and the measurement steps are cumbersome. Seriously affected the ship repair cycle and increased ship repair costs; during the measurement process of scanners and cameras, the positions of the measurement points were automatically identified by the equipment, and there was no substantive and accurate determination of the target during the measurement process, and there were measurement deviations. Contents of the invention [0003] The purpose of the present invention is to provide a three-dimensional mea...

AI Technical Summary

Problems solved by technology

[0002] At present, the methods for measuring propeller pitch mainly include traditional manual measurement, scanner measurement and camera measurement. Traditional manual measurement needs to make corresponding measurement tooling for different propellers. Since the whole process is manual operation, the measurement accuracy is poor and the measurement steps are cumbersome. Seriously affected the ship repair cycle and increased ship repair costs; during the measurement process of scanners and cameras, the positions of the measurement points are automatically identified by the equipment, and there is no substantial and accurate measurement of the target during the measurement process, and there are measurement deviations

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