Double-line structured light rapid calibration method for machine tool main shaft
A line-structured light and machine tool spindle technology, applied in the field of visual inspection, can solve problems such as the inability to complete the calibration of the machine tool spindle, and achieve the effect of simple production and good technical advantages
Inactive Publication Date: 2017-05-31
TIANJIN UNIV
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[0005] In order to overcome the shortcomings of the existing technology and solve the problem that the traditional shaft calibration method cannot complete the calibration of the machine tool spindle, the present invention aims to provide a two-line structured light sensor composed of two lasers and a camera, and use this sensor to realize the machine tool Quick Calibration of Spindle
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[0020] The invention provides a two-line structured light sensor composed of two lasers and a camera. During the calibration process of the machine tool spindle, the points on the intersection line between the two laser light planes and the surface of the tool handle are used as feature points. When using this line structured light for calibration, it is only necessary to ensure that the tool is within the field of view of the camera, and the calibration can be completed without rotating the spindle.
[0021] This design intends to use the information of each point on the light strip of the tool handle to solve the parameters of the axis of the machine tool spindle. Through geometric analysis, it is found that when the angle between a plane and the axis of the cylinder is small, the information of each point on the curve obtained by the intersection of the plane and the surface of the cylinder is used. When solving the cylinder axis equation as a known condition, there may be ...
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The invention relates to vision detection technologies and aims at providing a double-line structured light sensor composed of two laser devices and a camera. The double-line structured light sensor aims at solving the problem that calibration of a machine tool main shaft cannot be completed through a traditional rotating shaft calibration method. By means of the sensor, rapid calibration of the machine tool main shaft is achieved. According to the technical scheme, a double-line structured light rapid calibration method for the machine tool main shaft comprises the steps that the double-line structured light sensor composed of the two laser devices and the camera is adopted; and in the machine tool main shaft calibration process, points on intersection lines of light planes of the two laser devices and the surface of a tool handle are used as characteristic points. When line structured light is utilized for calibration, it is required to be guaranteed that a tool is located within a vision field scope of the camera. The double-line structured light rapid calibration method is mainly applied to vision detection occasions.
Description
technical field [0001] The invention relates to a visual inspection technology, in particular to a fast calibration method for a machine tool spindle with two-line structured light. Background technique [0002] Structured light three-dimensional visual measurement technology has the advantages of non-contact visual measurement, high speed, high degree of automation, and good flexibility. Structured light 3D vision is based on the principle of optical triangulation, and calculates the surface profile of the measured object by calculating the offset information of various light mode feature points in the collected image. The optical projector projects a certain light pattern, which makes the structured light image information easy to extract, so the measurement accuracy is high, and it is widely used in the online detection of various industrial products. [0003] A typical line structured light vision sensor consists of a line structured light laser and a matching camera. ...
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IPC IPC(8): B23Q17/24
Inventor 王鹏钟小峰孙长库
Owner TIANJIN UNIV