A Method of Extracting the Center Coordinates of Any Face in the Center of a Cylindrical Blind Hole in Image Measurement
An image measurement, cylindrical technology, used in measurement devices, instruments, optical devices, etc., can solve the problem of not being able to correctly characterize the positioning center, etc., to achieve convenient calibration and debugging, convenient for industrial measurement and scientific research, and a large measurement range Effect
Active Publication Date: 2019-03-12
爱特视(天津)科技有限公司
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Problems solved by technology
If there is a chamfer on the end face of the hole, and the chamfer is not concentric with the hole, the final calculated hole center may not correctly represent the actual positioning center of the hole
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[0024] The method for extracting the center coordinates of any face in the center of a cylindrical blind hole in the image measurement of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.
[0025] The method for extracting the center coordinates of any face in the center of a cylindrical blind hole in the image measurement of the present invention is to use figure 1 The method for extracting the coordinate extraction device for extracting the center coordinates of any face in the center of a cylindrical blind hole in the image measurement shown in figure 1 As shown, it includes a regular triangular prism 1 and a handle 2 connected to the regular triangular prism 1, wherein one corner of the regular triangular prism 1 is fixedly embedded in the end of one end of the handle 2, and the The upper end face of regular triangular prism 1 and the upper end face of described handle 2 are on the same plane, and 6 amo...
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The invention provides a method for extracting the coordinates of a hole center of any face at the center of a cylindrical blind hole, and the method employs a coordinate extraction device for extraction. The coordinate extraction device comprises a regular triangular prism and a holding handle connected to the regular triangular prism. One angle of the regular triangular prism is fixedly clamped at an end part of the holding handle in an embedded manner, and the upper end face of the regular triangular prism and the upper end face of the holding handle are located in the same plane. The method comprises the steps: inserting the regular triangular prism of the coordinate extraction device into a blind hole, and enabling the bottom surface of the regular triangular prism and the internal to-be-detected end face of the blind hole to be located in the same plane; enabling the edges, at which two angles, far from the holding handle, of the regular triangular prism are located to closely contact with the inner wall of the blind hole; rotating the regular triangular prism to rotate 360 degrees through the holding handle, and collecting a track formed by a mark point of the center of the circumcircle of the upper end face of the regular triangular prism in a rotating process in a mode of image measurement; and obtaining the center O of the circle formed by the track, i.e., the circle center of the internal to-be-detected end face of the blind hole. The method represents the center of the to-be-detected hole through the fitting of the circle, is higher in precision, and cannot damage a to-be-detected object.
Description
technical field [0001] The invention relates to a method for extracting the center coordinates of a cylindrical blind hole. In particular, it relates to a method for extracting the center coordinates of any face in the center of a cylindrical blind hole in image measurement. Background technique [0002] In mechanical processing, it is a very common method to use holes as positioning references between processes. For example, the "two pins on one side" method is a classic positioning method in mechanical processing. However, due to the allowable error in the processing of the hole, the upper deviation of the positioning pin cannot exceed the lower deviation of the hole. When the actual size of the hole reaches the upper deviation, the tolerance of the hole will inevitably be transformed into a positioning error. The positioning problem of the existing hole can be solved by using a coordinate measuring machine. The three-coordinate machine can detect the center of the hole ...
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IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 王仲杨桐郁刘常杰付鲁华李兴强吴振刚王磊
Owner 爱特视(天津)科技有限公司