A high-precision translation measurement method and device
A measurement method and high-precision technology, applied in the field of visual measurement, can solve problems such as difficult precision, high price, and easy damage to finished products, and achieve the effect of improving speed and precision
Active Publication Date: 2021-06-25
SUN YAT SEN UNIV
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[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0051] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.
[0052] In addition, in t...
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The invention discloses a high-precision translation measurement method and device. In the method, a first camera with a large field of view and low precision is fixed together with a second camera with a small field of view and high precision. First, the image of the first camera is used on the information board Search on the above to get a rough registration result, and then use the image of the second camera to search and register on the basis of the rough registration result obtained in the previous step to get an accurate registration result, which can be calculated as precise displacement. There is no need to process the coding scale of the grating ruler with high precision, but directly image the information plate on the translation platform, and identify the precise position of the center of the camera field of view on the information plate with high precision through image processing, so as to calculate the information ring corresponding to the camera field of view The amount of translation, in order to take into account the speed and accuracy of recognition, through dual-camera recognition technology, coarse registration and fine registration are combined to improve the speed and accuracy of image registration.
Description
technical field [0001] The invention relates to the field of visual measurement, and relates to a high-precision translation measurement method and device, in particular to a high-precision translation measurement method based on dual-camera technology. Background technique [0002] The displacement measurement is one of the important components of the geometric measurement technology. The translation measurement generally installs the translation measurement device on the measured object, and the displacement sensor is driven by the translation of the measured object to measure the change of the position of the object. Translation measurement devices (sensors) are widely used in robotics, aerospace, CNC machine tools, and displacement measurement of various high-precision closed-loop speed control systems and servo systems. In addition, in daily production and life, including transportation, industry and agriculture Various types of translation measuring devices are widely ...
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IPC IPC(8): G01B11/02G06T3/40G06T7/33G06T7/521
CPCG01B11/02G06T3/4038G06T2200/32G06T7/33G06T7/521
Inventor 杨夏郭贵松甘叔玮张小虎
Owner SUN YAT SEN UNIV