Rotary table calibration method based on four-axis optical scanning system
An optical scanning and turntable technology, which is applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problem that the fixed surface of the measured object cannot be measured, and achieve the effect of convenient and fast method, high calculation accuracy and strong operability
Active Publication Date: 2018-02-27
北京华睿盛德科技有限公司 +1
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Problems solved by technology
[0003] For the combination of the traditional laser scanning measuring head and the three-coordinate measuring machine, since the line laser displacement sensor can only scan and measure the target workpiece in a given direction at a time, there is always a fixed surface of the measured object that cannot be measured
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[0019] The present invention is described in further detail below in conjunction with accompanying drawing:
[0020] see figure 1 , figure 2 , a method for calibrating a turntable based on a line laser displacement sensor, especially a method for calibrating a turntable based on a four-axis optical scanning system, specifically includes the following steps:
[0021] Step 1, such as figure 2 As shown, the line laser displacement sensor 8 is installed according to the calibration requirements, and the line laser displacement sensor 8 is connected to the Y-axis of the measuring machine through the connecting plate 9 to ensure that the installation plane of the line laser displacement sensor is basically parallel to the yoz plane of the measuring machine. At the same time, the grating signal of the Z axis of the measuring machine is divided into two, one is connected to the controller of the measuring machine, and the other signal is connected to the controller of the line las...
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The invention discloses a rotary table calibration method based on a four-axis optical scanning system. According to the calibration requirement, a laser line scanning measuring head is installed, andcommunication connection between a line laser displacement sensor and a measuring machine is built; the measuring machine drives a line laser displacement sensor to return to the zero point of a machine tool, the reading (0,0) of the line laser displacement sensor is adopted as the original point to build a reference coordinate system O-XYZ. A rotary table center is calibrated. Line laser displacement sensor measuring data is converted to the reference coordinate system under 0 degree of the rotary table; finally, the line laser displacement sensor measuring data is converted to the referencecoordinate system under 0 degree of the rotary table. According to the method, two high and low master balls are utilized to calibrate space poses of the line laser displacement sensor, the rotary table center, and a rotary table normal vector. The method effectively reduces errors caused by the line laser displacement sensor space poses, and the cost of the whole measuring scheme is effectivelylowered.
Description
Technical field: [0001] The invention belongs to the field of optoelectronics, and relates to a method for calibrating a turntable based on a four-axis optical scanning system, in particular to a method for converting measurement data into a unified reference coordinate system. Background technique: [0002] Optical measurement method is a popular advanced measurement method in the field of modern industrial inspection. For complex-shaped objects, the surface features are diverse and the surface curvature varies in a large range. Compared with the contact measurement method, the optical measurement method can quickly complete the measurement of the three-dimensional shape of the object in a short time, and its measurement efficiency is high. , the amount of sampled data is large, not only has outstanding achievements in the field of reverse engineering, but also provides high-precision data support for subsequent parameter analysis. [0003] For the combination of the tradi...
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Login to View More IPC IPC(8): G01B11/00G01B11/24
CPCG01B11/002G01B11/24
Inventor 许畅达高晓飞
Owner 北京华睿盛德科技有限公司