Three‐dimensional deformation measurement of aero‐engine high‐speed rotating blade surface based on stroboscopic structure digital image correlation method

Wu, Huilin; Sun, Chuanzhi; Yu, Zhenjiang; Mei, Yingjie; Wang, Xiaoming; Ma, Hongyuan; Zou, Limin; Liu, Yongmeng; Tan, Jiubin

doi:10.1002/stc.3117

Cited by 10 publications

(5 citation statements)

References 49 publications

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“…As part of the experimental setup, calibration was done. Several studies [26][27][28][29][30][31]34,35 discuss the mode of operation, calibration, object preparation, and measurement technique in great detail.…”

Section: Methodsmentioning

confidence: 99%

Stress-strain analysis of steel S235JRH pipe ring tensile specimens using 3D optical methods

Travica,

Mitrović,

Petrović

et al. 2023

Measurement and Control

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Various pipe production procedures, including the construction of seamless pipes using a shaft with the conical tip in the oil industry, require data on the circumferential strain and stress state of the pipe. A method for measuring the displacement, strain and stress behavior of a pipe ring tensile specimen (PRTS) in the hoop direction is what this study’s goal was to develop, as there was a lack of a standardized testing process. For the study, five single S235JRH steel PRTS were tested. In the paper, it is presented how to test S235JRH steel PRTS using a Digital Image Correlation method, Thermal Imaging camera, and 3D scanner. A specially designed steel tool with two D blocks was developed for testing steel PRTS. The strain progression was documented using the 3D Digital Image Correlation method. Using a thermographic camera, an attempt was made to analyze the change in the temperature field of the PRTS during the test. All the specimens were subjected to 3D scanning to verify the cross-sectional geometry of the PRTS after a fracture. Fractures of all Single PRTS occurred in the break zone and almost identical places. The deviation value for the Experimental Ultimate strength value (true stress value) higher than the theoretical Ultimate strength value. Deviation value for the Experimental 0.2% Offset Yield Strength value is higher than the theoretical value. The results of the analysis of cross-sectional dimensions revealed a more significant variation in the thickness of the PRTS compared to its width. A potential area of literature review is the application of a high-resolution thermal imaging camera and the analysis of the stress state of the material using it.

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Section: Methodsmentioning

confidence: 99%

Stress-strain analysis of steel S235JRH pipe ring tensile specimens using 3D optical methods

Travica,

Mitrović,

Petrović

et al. 2023

Measurement and Control

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show abstract

“…They introduced a calibration method based on the features of the blade reference surface, eliminating pose errors in the system without the need for additional calibration objects. The area-source method typically employs digital image correlation techniques [13,14] or structured light technology. For example, Huang et al [15] and others proposed an efficient and highly accurate full-section blade measurement technique based on multi-view structured light three-dimensional measurement.…”

Section: Introductionmentioning

confidence: 99%

Measuring the profile of aircraft engine blades using spectral confocal sensors

Chen,

Xue,

Sun

et al. 2024

Meas. Sci. Technol.

Self Cite

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The geometric parameters of aircraft engine blades need to be precisely measured to ensure the quality of the blades for the normal operation of aircraft engines. This study aims to address the challenges of existing measurement systems in balancing efficiency, accuracy, and completeness. Additionally, it aims to enhance the accuracy and robustness of the algorithm for extracting blade profile characteristic parameters. In this paper, a spectral confocal sensor is employed to establish a blade profile measurement system. The design includes a probe sampling strategy, and a standard ball is used to calibrate the sensor probe's light emission direction and the precise rotation center of the turntable. The paper proposes the use of methods such as partition search algorithm, binary search, and curvature segmentation to process point cloud data of blade body and tenon. We have conducted experimental measurements on the blades of an aircraft engine. The acquired three-dimensional point cloud data of multiple sets of blade cross-sections and dovetail sections were processed. After calculation, the maximum measurement errors for chord length, maximum blade thickness, tenon width, bottom height, top angle, and bottom angle are -0.0036mm, -0.00721mm, -0.0102mm, -0.00928mm, 0.0086 °, and -0.0058 °, respectively. This process validates the effectiveness of the proposed method and has high measurement accuracy. Compared with the CMM method, this method is more accurate in measuring small pits and large curvature micro surfaces, with higher measurement integrity and higher measurement efficiency.

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“…In addition, owing to the increasing demand for the measurement of large-size structures (such as wind tunnels [7] and aero-engine rotating blades [8]), binocular vision systems with a large field-of-view (FOV) are required [9]. To calibrate the vision systems with a large FOV, researchers have used the one-dimensional (1D) target containing multiple points [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Calibration method for binocular vision system with large field of view based on small target image splicing

Li,

Xu,

Zhang

et al. 2024

Meas. Sci. Technol.

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In vision measurement, camera calibration has a significant impact on measurement precision. The classical target-based calibration methods require the target to occupy more than one-third of the field of view. A small-size target that does not meet the requirements results in poor calibration accuracy, while an appropriate large-size target is difficult to manufacture and inconvenient to operate. In view of the above problem, we propose a flexible and accurate calibration method based on small target image splicing to calibrate the binocular vision system with a large field of view. The spliced images and virtual large targets are constructed to extend the target size, providing better flexibility for calibration. Moreover, an optimization objective function integrating two constraints in the imaging plane and measurement space is presented to improve the calibration accuracy during the parameter optimization process. The simulation experiments and actual experiments are carried out to test the performance of the proposed method. The results demonstrate that the calibration accuracy of the proposed method using a small target is equivalent to that of Zhang’s method using a large target. Additionally, when using a same-size target, the parameter error of the proposed method is less than that of Zhang’s method, and the proposed method reduces the distance measurement error from 1.169mm to 0.208mm compared to Zhang's method.

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Three‐dimensional deformation measurement of aero‐engine high‐speed rotating blade surface based on stroboscopic structure digital image correlation method

Cited by 10 publications

References 49 publications

Stress-strain analysis of steel S235JRH pipe ring tensile specimens using 3D optical methods

Stress-strain analysis of steel S235JRH pipe ring tensile specimens using 3D optical methods

Measuring the profile of aircraft engine blades using spectral confocal sensors

Calibration method for binocular vision system with large field of view based on small target image splicing

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