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Scanning type object surface three-dimensional shape measurement method and device

A technology of three-dimensional topography and object surface, which is used in measuring devices, optical devices, instruments, etc. It can solve the problems of scanning speed limitation, inability to achieve large-scale high-speed scanning at the same time, and small scanning range. Fast, easy-to-use effects

Active Publication Date: 2013-02-20
BEIHANG UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The scanning speed of the galvanometer scanning method is limited, and the scanning range of the AOD acousto-optic device scanning method is small, and it is impossible to achieve large-scale high-speed scanning at the same time

Method used

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  • Scanning type object surface three-dimensional shape measurement method and device
  • Scanning type object surface three-dimensional shape measurement method and device
  • Scanning type object surface three-dimensional shape measurement method and device

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Embodiment Construction

[0032] The specific implementation of the measuring device will be described below with reference to the accompanying drawings.

[0033] 1) if Figure 4 As shown, the present invention is a scanning type object surface three-dimensional shape measuring device, which is composed of a measuring head, a computer and a displacement platform, and the positional connection relationship between them is that the computer is connected to the measuring head and the displacement platform respectively through data lines.

[0034] The measuring head is composed of a laser, a scanning device and an imaging device. The positional connection relationship between them is that the laser and the imaging device maintain a predetermined angle and are placed on the same side of the scanning device.

[0035] The laser is a visible light semiconductor laser. The scanning device is composed of a motor, a multi-faceted rotating mirror, and an angle encoder; the relationship between them is: the motor ...

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Abstract

The invention relates to a scanning type object surface three-dimensional shape measurement device which is composed of a measurement head, a displacement table and a computer, wherein the computer is respectively connected with the measurement head and the displacement table by data lines; the measurement head is composed of a laser, a scanning device and an imaging device; a predetermined included angle is kept between the laser and an optical axis of the imaging device; the laser and the imaging device are placed at the same side of the scanning device; the scanning device comprises a motor, a multi-faceted rotating mirror and an angle encoder; the multi-faceted rotating mirror and the angle encoder are driven by the motor to rotate at high speed; and the imaging device comprises an imaging lens and a camera. The invention relates to a scanning type object surface three-dimensional shape measurement method comprising three steps. The measurement method is high in speed, large in measurement scope, high in precision and the like, and can be used for three-dimensional shape measurement of the surface of general objects.

Description

technical field [0001] The invention relates to a method and device for measuring three-dimensional shape of a scanning object surface. The basic principle of the device is to use laser triangulation to realize non-contact optical measurement, and can be used for three-dimensional shape measurement of general object surfaces. The invention belongs to the technical field of optical three-dimensional measurement. Background technique [0002] As a typical non-contact optical active 3D measurement method, laser triangulation is widely used in many fields such as 3D shape measurement, reverse engineering and quality inspection. Laser triangulation can only measure one point at a time, so some measures need to be taken to achieve the shape measurement of the entire object. Common measures include: beam scanning, object displacement, and the combination of beam scanning and object displacement. Common beam scanning methods include: galvanometer scanning method, AOD acousto-optic...

Claims

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Application Information

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IPC IPC(8): G01B11/24
Inventor 李旭东赵慧洁李成杰边赟姜宏志
Owner BEIHANG UNIV
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