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Three-dimensional contour real-time measurement method of dynamic objects

A three-dimensional profile, real-time measurement technology, used in measurement devices, instruments, optical devices, etc.

Active Publication Date: 2016-09-21
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no method and measuring instrument that can fully meet these requirements

Method used

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  • Three-dimensional contour real-time measurement method of dynamic objects
  • Three-dimensional contour real-time measurement method of dynamic objects
  • Three-dimensional contour real-time measurement method of dynamic objects

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Embodiment

[0055] The embodiments of the present invention are applied to figure 1 The device shown uses a multi-threaded parallel computing method for real-time processing, and transfers simple numerical calculations and the same operations performed on each pixel to the computer graphics processing unit (GPU), using the GPU’s powerful floating point Computing and parallel processing capabilities speed up the data processing process. Finally, with the Labwidow operating platform, modules such as grating position modulation, light source control, data acquisition and processing are integrated to form a virtual measuring instrument to realize measurement process control and automate the entire measurement process.

[0056] See figure 1 , The optical axis of the CCD is perpendicular to the grating surface, the two light sources are arranged at equal intervals, the optical center of the CCD and the light source center are placed at a distance from the grating plane L, and the distance between ...

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Abstract

The present invention discloses a three-dimensional contour real-time measurement method of dynamic objects. The method comprises the steps of projecting a phase shift color fringe image according to a height change synchronizing signal of the measured objects placed in a measurement space, determining a measurement phase according to the phase shift color fringe image, and carrying out the phase unwrapping on the measurement phase according to a phase unwrapping method, and finally carrying out the three-dimensional reconstruction according to the phase-height one-to-one correspondence and a height search table. The three-dimensional contour real-time measurement method of the dynamic objects of the present invention realizes the high-precision depth measurement and the measurement system high-speed data processing to thereby carry out the high-precision dynamic object three-dimensional contour real-time measurement, opens up a new path for the dynamic complicated object three-dimensional measurement, is expected to achieve the equipment state dynamic monitoring and real-time measurement, and enables the technical levels of the online industrial detection( the closed loop quality control), a robot technology(the accurate navigation) and the dynamic target three-dimensional measurement (the rotating blades and the facial expression) to be improved substantially.

Description

Technical field [0001] The invention relates to the technical field of optical precision measurement, in particular to a real-time measurement method of a three-dimensional contour of a dynamic object. Background technique [0002] High-precision, high-speed 3D measurement technology for dynamic objects can quickly obtain important information such as the 3D features, shape and size, and working posture of parts, and can feed back the measurement results to the manufacturing process to improve processing quality and accuracy. Therefore, its technology is in There are a lot of demands in industrial occasions such as quality inspection, three-dimensional shape measurement of parts under working conditions, deformation or vibration analysis. For example, aero-engine blades, steam turbine blades, fan blades and other important components will deform under working conditions, which greatly affects the working performance of mechanical equipment, and when the deformation exceeds a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/254
Inventor 杜虎兵王建华高红红颜菁菁
Owner XIAN TECHNOLOGICAL UNIV
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