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Precise small hole three-dimensional measurement method and device

A precision small hole and three-dimensional measurement technology, applied in the field of mechanical processing, can solve the problems of three-dimensional measurement of precision small holes and other problems, achieve efficient access integration, and solve the effect of small hole occlusion

Inactive Publication Date: 2021-05-04
VOMMA (SHANGHAI) TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a three-dimensional measurement method for precision small holes, aiming to solve the problem of three-dimensional measurement of precision small holes in existing mechanical parts

Method used

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  • Precise small hole three-dimensional measurement method and device
  • Precise small hole three-dimensional measurement method and device
  • Precise small hole three-dimensional measurement method and device

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Embodiment Construction

[0022] According to one or more embodiments, such as figure 1 As shown, a precision three-dimensional small hole three-dimensional measurement method based on a light field camera includes the following steps:

[0023] A1, according to the size of the measured precision three-dimensional small hole measurement area and the measurement depth range, select an optical lens with a suitable focal length and magnification. Adjust the lens aperture to match the aperture of the light field camera, that is, the aperture of the microlens matches the aperture of the main lens. The specific performance is that the light field camera shoots a defocused soft light pure color calibration plate image, in which the microlens array is just or close to a tangent state. After the adjustment is completed, take several solid color background plates with relatively uniform light intensity at the defocused position of the light field camera, that is, the defocused soft light solid color calibration p...

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Abstract

The invention relates to a precise small hole three-dimensional measurement method. The precise small hole three-dimensional measurement method comprises the steps of: arranging at least one light field camera for shooting an region image of a precise small hole to be measured; arranging a proper light source to irradiate the region of the measured precise small hole, so that the precise small hole can be well imaged by the light field camera; shooting a measured precise three-dimensional small hole region through using the light field camera to obtain a image of the to-be-measured precise small hole region, and performing light field multi-view rendering and depth calculation to obtain a light field multi-view image and a depth image; according to the light field multi-view image and the depth image, carrying out position identification and positioning on the measured precise small hole; and according to the light field multi-view image and the depth image, acquiring the three-dimensional geometric parameters of the measured precise small hole.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a three-dimensional measurement method and device for precision small holes. Background technique [0002] Precision three-dimensional small holes are widely used in industrial precision parts, such as aero-engines, gas turbine blade air film holes, internal combustion engine fuel atomizer nozzles, etc. The small holes in precision parts have complex three-dimensional geometric shapes, difficult processing, and difficult detection. . Precision three-dimensional small holes refer to non-circular heterogeneous holes with a diameter between 10 μm and 1 mm, which are generally processed by EDM technology and laser processing technology. The special-shaped precision small holes in precision parts will have different three-dimensional geometric shapes such as dustpan holes, fan-shaped holes, backward-inclined holes, and tapered holes according to the work req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/25
Inventor 丁俊飞李浩天
Owner VOMMA (SHANGHAI) TECH CO LTD
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