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Hydraulic machinery blade surface detecting method and device

A technology of hydraulic machinery and detection methods, which is applied to mechanical measurement devices, mechanical devices, measurement devices, etc., can solve the problems of slow measurement speed, slow speed, and difficulty in obtaining comprehensive surface information, so as to achieve convenient equipment installation and accurate detection. High accuracy and fast inspection speed

Inactive Publication Date: 2017-05-31
JIANGSU UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for detecting the curved surface of hydraulic machinery blades to solve the problems of slow measurement speed, difficult disassembly of large impellers, difficulty in obtaining comprehensive curved surface information and poor portability in traditional measurement and contact measurement, so as to complete hydraulic The detection of the curved surface of the mechanical blade provides a reference for subsequent processing or repair
[0006] A method for detecting curved surfaces of hydraulic machinery blades, characterized in that: the three-dimensional imaging technology based on phase-transfer structured light is used to complete the three-dimensional modeling of the model to be tested, so as to overcome the shortcomings of traditional measurement methods such as slow speed, incomplete construction of curved surface information, and poor mobility. Then compare with the prototype to make a judgment for reprocessing or 3D printing repair

Method used

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  • Hydraulic machinery blade surface detecting method and device
  • Hydraulic machinery blade surface detecting method and device
  • Hydraulic machinery blade surface detecting method and device

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Embodiment Construction

[0027] A specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] figure 1 The specific process of 3D scanning is given, which is mainly divided into experiment preparation, image acquisition and post-processing stages.

[0029] Such as figure 2 As shown, it is enough to place the impeller to be tested in a suitable position to ensure sufficient light, and there is no need to disassemble it from the original hydraulic machine and disassemble it (unless the shooting angle is blocked due to the structure of the hydraulic machine).

[0030] combine image 3 , arrange the specific positions of each component, fix two high-speed cameras and a grating projection device on the bracket, arrange the two cameras at an angle of 60°, and place the grating projection device in the middle of the two cameras, and face the impeller to be tested , adjust the shooting angle to a suitable position to focus and set a ...

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Abstract

The invention discloses a hydraulic machinery blade surface detecting method and device. The method and device use a composite three-dimensional non-contact measurement technology which is combined with a structural light technology, a phase measurement technology and a computer vision technology to detect the blade surface. The method comprises the steps of part fixing, multi-angle scanning, data stitching, point cloud data processing, materialization, error analysis, 3D printing numerical control repair and the like. According to the invention, the hydraulic machinery blade surface detecting method and device have the advantages of high detection precision, convenient device installation and quick inspection speed; components to be detected are not dismantled; and a detection result can be directly used for subsequent digital processing or 3D printing repair.

Description

technical field [0001] The present invention is a large-scale curved surface detection method and device, which is suitable for the shape detection of hydraulic mechanical rotating impeller blades, and specifically refers to the composite three-dimensional non-contact measurement technology combined with structured light technology, phase measurement technology, and computer vision technology to detect the blade curved surface methods and devices. Background technique [0002] Hydraulic machinery is a general-purpose equipment widely used in various fields of national economic construction. Especially in the energy system, it is not only the main body of hydropower energy, but also an important auxiliary system for thermal power and nuclear power. Its operation stability and reliability will directly affect the power generation system. The quality of operation and the safety of power production. The impeller is the main working part of hydraulic machinery. In order to impro...

Claims

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Application Information

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IPC IPC(8): G01B11/25
CPCG01B11/2545G01B5/003
Inventor 司乔瑞陆荣李彦军唐苑峰衡亚光
Owner JIANGSU UNIV
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