Portable optical fiber interference three-dimensional coordinate measurement machine and three-dimensional coordinate measurement method
A three-coordinate measuring machine, optical fiber interference technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of measurement accuracy less than 0.1mm, large lens distortion, etc.
Inactive Publication Date: 2013-10-16
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology
Since the z-axis is the optical axis direction of the camera, the lens distortion in this direction is the largest, and there are factors such as image interference in the measurement background, so that although the measurement accuracy in the x and y-axis directions can reach 0.1mm, but in the z-axis The measurement accuracy of direction is less than 0.1mm
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[0070] Embodiment Portable optical fiber interference three-coordinate measuring machine and method for measuring three-coordinates thereof
[0071] 1. Portable fiber optic interference three-coordinate measuring machine
[0072] figure 1 Shown is a portable optical fiber interference three-coordinate measuring machine, which includes an optical fiber diffraction spherical wave generator, an optical fiber pen 2, and a spherical wave interference light intensity measuring instrument 1, and their components are expressed as follows:
[0073] (1) Optical fiber diffraction spherical wave generator and optical fiber pen 2
[0074] ① The optical fiber diffraction spherical wave generating device includes a semiconductor laser 9 , a laser input coupler 8 , a single-mode fiber 7 , a laser coupler 5 , a phase shifter 4 , single-mode fibers 101 and 102 , and a fiber fixing ring 3 .
[0075] ②Semiconductor laser 9, laser input coupler 8, single-mode optical fiber 7 for coupling, and la...
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The invention discloses a portable optical fiber interference three-dimensional coordinate measurement machine and a three-dimensional coordinate measurement method. The portable optical fiber interference three-dimensional coordinate measurement machine comprises an optical fiber diffraction spherical wave generating device, an optical fiber pen and a spherical wave interference light intensity measurement apparatus. The three-dimensional coordinate measurement method comprises the steps of: forming a nonlinear overdetermined equation by adopting a multi-reference point multilateral measurement rule, solving coordinates of two optical fiber spherical wave emitting end centers A and B in an o-xyz coordinate system by applying a least squares iteration method, and solving three-dimensional coordinates of a pen point (measured point) of the optical fiber pen by applying a collinear condition. The portable optical fiber interference three-dimensional coordinate measurement machine has a simple structure and a low cost, is easy to operate during measurement, and has a reliable measurement result, wherein the measurement precision can reach 1mu m, if the size of a CCD photoelectric detector array is effectively increased, the measurement precision can be increased to 0.1 mu m. The invention is suitable for measurement of three-dimensional coordinates in any occasions.
Description
technical field [0001] The invention relates to a measuring instrument for spatial coordinates and a method for using the same, in particular to a portable optical fiber interference three-coordinate measuring machine and a method for measuring three-coordinates. Background technique [0002] As a high-efficiency precision measuring instrument, the three-coordinate measuring machine summarizes the measurement of all geometric quantities such as size, shape, and position into coordinate measurement, and uses software to find characteristic parameters and evaluate them, so that it has strong versatility; moreover, Because of its large measurement range, high precision, and easy connection with flexible manufacturing systems and computer integrated manufacturing systems, it is widely used in industries such as machinery, electronics, automobiles, and aerospace. [0003] However, the total weight of a traditional three-coordinate measuring machine is often several tons or even d...
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IPC IPC(8): G01B11/00
Inventor 黄风山李保章黄风海方忆湘崔彦平
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY