Displacement and deformation measurements of helicopter rotor blades based on binocular stereo vision

ZUO Chenglin; MA Jun; YUE Tingrui; SONG Jin; WANG Xunnian

doi:10.11729/syltlx20190071

Volume 34 Issue 1

Feb. 2020

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Journal of Experiments in Fluid Mechanics > 2020 > 34(1): 87-95. > DOI: 10.11729/syltlx20190071

ZUO Chenglin, MA Jun, YUE Tingrui, SONG Jin, WANG Xunnian. Displacement and deformation measurements of helicopter rotor blades based on binocular stereo vision[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(1): 87-95. DOI: 10.11729/syltlx20190071

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Displacement and deformation measurements of helicopter rotor blades based on binocular stereo vision

ZUO Chenglin^{1, 2,},
MA Jun^{1, 2, ,},
YUE Tingrui²,
SONG Jin²,
WANG Xunnian¹

1.
State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China
2.
Low Speed Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

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Received Date: June 10, 2019
Revised Date: July 11, 2019

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Abstract

Abstract

To realize the displacement and deformation measurements of helicopter rotor blades in a non-contact way, the binocular stereo vision based three-dimensional measurement method is presented. First, coded targets with unique identifying information are pasted on the rotor blades. Then, with nanosecond illumination provided by the high-frequency laser, high-speed CCD cameras are triggered synchronously to acquire the transient images of rotor blades. Finally, based on the binocular stereo principle, three-dimensional coordinates of coded targets are obtained, which are used to calculate the displacement and deformation parameters of rotor blades further. The test results show that the accuracy of our proposed method is better than 0.3 mm, which is capable of meeting the high precision displacement and deformation measurement requirements of helicopter rotor blades.
- helicopter rotor,
- displacement and deformation,
- non-contact measurement,
- binocular stereo vision,
- coded targets

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References (28)

References

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Displacement and deformation measurements of helicopter rotor blades based on binocular stereo vision

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