公开(公告)号：US06393930B1

公开(公告)日：2002-05-28

申请号：US09560683

申请日：2000-04-27

申请人： Se Kyong Song ,  Wan Soo Kim ,  Dong Soo Kwon ,  Hyung Suck Cho

发明人： Se Kyong Song ,  Wan Soo Kim ,  Dong Soo Kwon ,  Hyung Suck Cho

IPC分类号： F16H2522

CPC分类号： F16H25/2228 ,  Y10T74/18688

摘要： A ball screw with inner ball circulation whose transfer displacement to size ratio is large, resulting in a device which has an optimized size with a positioning accuracy measured in microns, and a linear actuator equipped with the ball screw, are disclosed. The ball screw includes a plurality of balls arranged in a space between a hemispherical groove formed on a cylindrical inner surface of a housing and a hemispherical groove of a rotating male screw. The ball screw also includes a ball circulation tube with its cylindrical outer surface formed with the hemispherical groove of the male screw and with the groove corresponding to the hemispherical groove of the housing. The ball circulation tube is formed with ball openings penetrating from both ends of the male screw toward the inner part. The ball screw also includes a ball circulation section, which fits inside the ball circulation tube, and has a hemispherical inner return path formed on its outer cylindrical surface. By coupling the ball circulation section to the ball circulation tube, the inner return path has a start point and end point which are matched with the ball openings of the ball circulation tube and the ball circulation tube and the ball circulation section can rotate together as a fixed unit with the balls circulating along the inner return path of the ball circulation section.

摘要翻译： 具有内球循环的滚珠丝杠，其传递位移与尺寸比大，导致具有优化尺寸的装置，具有以微米计量的定位精度，以及配备有滚珠丝杠的线性致动器。 滚珠丝杠包括布置在形成在壳体的圆柱形内表面上的半球槽与旋转的外螺纹的半球形凹槽之间的空间中的多个球。 滚珠丝杠还包括球形循环管，其圆柱形外表面形成有阳螺纹的半球形凹槽，并且凹槽对应于壳体的半球形凹槽。 球循环管形成有从外螺纹两端向内部贯穿的球形开口。 滚珠丝杠还包括球循环部，其配合在球循环管内部，并且具有形成在其外圆柱形表面上的半球形内部返回路径。 通过将球循环部连接到球循环管，内返回路径具有与球循环管和球循环管的球开口相匹配的起点和终点，球循环段可一起旋转 固定单元，其具有沿着球循环部分的内部返回路径循环的滚珠。

公开(公告)号：US07480061B2

公开(公告)日：2009-01-20

申请号：US11998175

申请日：2007-11-27

申请人： Hyun Ki Lee ,  Hyung Suck Cho

发明人： Hyun Ki Lee ,  Hyung Suck Cho

IPC分类号： G01B11/24

CPC分类号： G01B11/2527 ,  G01B11/254 ,  G01B11/2545

摘要： Disclosed herein is a 3D shape measurement method and apparatus using a stereo moiré technique. The 3D shape measurement method measures the 3D shape of an object to be measured using a digital pattern projector and first and second cameras. The method includes a first step of projecting a phase-shifted fringe pattern onto the object to be measured using the digital pattern projector, a second step of acquiring four fringe images using each of the first and second cameras, and then acquiring two pieces of phase information using a moiré technique, and a third step of acquiring a pair of corresponding points, which satisfy stereo phase conditions for making all 2π ambiguity constants as integers, using the two pieces of phase information and then measuring the 3D shape of the object using the corresponding points.

摘要翻译： 本文公开了使用立体莫尔技术的3D形状测量方法和装置。 3D形状测量方法使用数字图案投影仪和第一和第二相机测量待测物体的3D形状。 该方法包括：使用数字图案投影仪将相移条纹图案投影到待测量对象的第一步骤;使用第一和第二相机中的每一个获取四个条纹图像的第二步骤，然后获取两个相位 使用莫尔技术的信息，以及第三步骤，使用两条相位信息获取满足用于使所有2pi模糊常数作为整数的立体相位条件的一对对应点，然后使用所述两个相位信息来测量对象的3D形状 对应点。

公开(公告)号：US06678059B2

公开(公告)日：2004-01-13

申请号：US09879273

申请日：2001-06-13

申请人： Hyung Suck Cho ,  Won Shik Park ,  Yong Kyu Byun ,  Noh Yeol Park

发明人： Hyung Suck Cho ,  Won Shik Park ,  Yong Kyu Byun ,  Noh Yeol Park

IPC分类号： G01B1114

CPC分类号： G01C15/00 ,  G01D5/30 ,  G01S5/163

摘要： An apparatus for measuring six-degree-of-freedom motions by using three-facet reflector, the six-degree-of-freedom motions of an object being measured by using the laser beam proceeding from a laser light source, comprising: a multiple facet reflector in the form of a trigonal pyramid, the multiple facet reflector being fixed on the object for measurement and able to reflect the laser beam in three directions; three position-sensitive detectors for measuring the position and intensity of the laser light points formed on their surfaces, with the movement of the multiple facet reflector, and then providing output signals; and a controlling section for analyzing six-degree-of-freedom motions of the multiple facet reflector by using the position and intensity of the laser light points output from the three position-sensitive detectors. (FIG. 4).

摘要翻译： 一种用于通过使用三面反射器测量六自由度运动的装置，通过使用从激光源进行的激光束来测量物体的六自由度运动，包括：多面 反射器呈三角锥形，多面反射器固定在物体上用于测量，并能够在三个方向上反射激光束; 三个位置敏感检测器，用于测量形成在其表面上的激光点的位置和强度，随着多面反射器的移动，然后提供输出信号; 以及控制部分，用于通过使用从三个位置敏感检测器输出的激光点的位置和强度来分析多面反射器的六自由度运动。 （图4）。

公开(公告)号：US07548324B2

公开(公告)日：2009-06-16

申请号：US11716059

申请日：2007-03-01

申请人： Hyun Ki Lee ,  Hyung Suck Cho

发明人： Hyun Ki Lee ,  Hyung Suck Cho

IPC分类号： G01B11/30

CPC分类号： G01B11/25

摘要： A three-dimensional (3-D) shape measurement method using a Moire measurement principle and a Stereo vision measurement principle is provided. The method comprises; a first step to detect candidate points and 3D positions of the candidate points in world coordinates which are identical results from typical Moiré technique by using a pattern projector, which adjusts a pitch of a fringe pattern and projects the fringe pattern to a measurement object, and a first camera, which detects a modulated fringe pattern caused by shape of the object, by means of obtaining candidate points by comparing a reference fringe pattern to the modulated fringe pattern and calculating 3D positions at an arbitrary point on an image captured from the first camera; a second step to determine a final matching point among the candidate points detected from the first step by using the Stereo vision technique with the first and the second cameras, by means of projecting the 3D positions of the candidate points to an image plane of the second camera based on a camera matrix of the second camera, comparing intensity value of a projected point in the image plane of the second camera to intensity value of given point in the image plane of the first camera, and judging whether the candidate point is matched with an arbitrary point by using the stereo vision criteria; and a third step to measure the depth value of the arbitrary point by using the resultant value of the final matching point, which was determined at the second step. Therefore, the error of 2π ambiguity of the typical Moire principle is eliminated, and thus 3-D shape information can be more rapidly and accurately measured.

摘要翻译： 提供了使用莫尔测量原理和立体视觉测量原理的三维（3-D）形状测量方法。 该方法包括： 通过使用调整边缘图案的间距并将条纹图案投影到测量对象的图案投影仪来检测世界坐标中候选点的候选点和3D位置的第一步骤，其是与典型莫尔技术相同的结果，以及 第一相机，其通过将参考条纹图案与调制条纹图案进行比较并计算从第一相机拍摄的图像上的任意点处的3D位置来获得候选点，来检测由对象的形状引起的调制条纹图案 ; 第二步骤，通过将候选点的3D位置投影到第二摄像机的图像平面，通过使用具有第一和第二摄像机的立体视觉技术来确定从第一步骤检测到的候选点中的最终匹配点 将第二相机的图像平面中的投影点的强度值与第一相机的图像平面中的给定点的强度值进行比较，并且判断候选点是否与 使用立体视觉标准的任意点; 以及通过使用在第二步骤确定的最终匹配点的结果值来测量任意点的深度值的第三步骤。 因此，消除了典型莫尔原理的2pi模糊度的误差，因此可以更快速，准确地测量3-D形状信息。

公开(公告)号：US20070211258A1

公开(公告)日：2007-09-13

申请号：US11716059

申请日：2007-03-01

申请人： Ki Lee ,  Hyung Suck Cho

发明人： Ki Lee ,  Hyung Suck Cho

IPC分类号： G01B11/24

CPC分类号： G01B11/25

摘要： A three-dimensional (3-D) shape measurement method using a Moire measurement principle and a Stereo vision measurement principle is provided. The method comprises; a first step to detect candidate points and 3D positions of the candidate points in world coordinates which are identical results from typical Moiré technique by using a pattern projector, which adjusts a pitch of a fringe pattern and projects the fringe pattern to a measurement object, and a first camera, which detects a modulated fringe pattern caused by shape of shape of the object, by means of obtaining candidate points by comparing a reference fringe pattern to the modulated fringe pattern and calculating 3D positions at an arbitrary point on an image captured from the first camera; a second step to determine a final matching point among the candidate points detected from the first step by using the Stereo vision technique with the first and the second cameras, by means of projecting the 3D positions of the candidate points to an image plane of the second camera based on a camera matrix of the second camera, comparing intensity value of a projected point in the image plane of the second camera to intensity value of given point in the image plane of the first camera, and judging whether the candidate point is matched with an arbitrary point by using the stereo vision criteria; and a third step to measure the depth value of the arbitrary point by using the resultant value of the final matching point, which was determined at the second step. Therefore, the error of 2π ambiguity of the typical Moire principle is eliminated, and thus 3-D shape information can be more rapidly and accurately measured.

摘要翻译： 提供了使用莫尔测量原理和立体视觉测量原理的三维（3-D）形状测量方法。 该方法包括： 通过使用调整边缘图案的间距并将条纹图案投影到测量对象的图案投影仪来检测世界坐标中候选点的候选点和3D位置的第一步骤，其是与典型莫尔技术相同的结果，以及 第一照相机，其通过将参考条纹图案与被调节的条纹图案进行比较来获得候选点，并且计算从所述被调色条纹图案捕获的图像上的任意点处的3D位置，来检测由所述物体的形状形成的调制条纹图案 第一台相机; 第二步骤，通过将候选点的3D位置投影到第二摄像机的图像平面，通过使用具有第一和第二摄像机的立体视觉技术来确定从第一步骤检测到的候选点中的最终匹配点 将第二相机的图像平面中的投影点的强度值与第一相机的图像平面中的给定点的强度值进行比较，并且判断候选点是否与 使用立体视觉标准的任意点; 以及通过使用在第二步骤确定的最终匹配点的结果值来测量任意点的深度值的第三步骤。 因此，消除了典型莫尔原理的2pi模糊度的误差，因此可以更快速，准确地测量3-D形状信息。

公开(公告)号：US20080239288A1

公开(公告)日：2008-10-02

申请号：US11998175

申请日：2007-11-27

申请人： Hyun Ki Lee ,  Hyung Suck Cho

发明人： Hyun Ki Lee ,  Hyung Suck Cho

IPC分类号： G01N21/00

CPC分类号： G01B11/2527 ,  G01B11/254 ,  G01B11/2545

摘要： Disclosed herein is a 3D shape measurement method and apparatus using a stereo moiré technique. The 3D shape measurement method measures the 3D shape of an object to be measured using a digital pattern projector and first and second cameras. The method includes a first step of projecting a phase-shifted fringe pattern onto the object to be measured using the digital pattern projector, a second step of acquiring four fringe images using each of the first and second cameras, and then acquiring two pieces of phase information using a moiré technique, and a third step of acquiring a pair of corresponding points, which satisfy stereo phase conditions for making all 2π ambiguity constants as integers, using the two pieces of phase information and then measuring the 3D shape of the object using the corresponding points.

摘要翻译： 本文公开了使用立体莫尔技术的3D形状测量方法和装置。 3D形状测量方法使用数字图案投影仪和第一和第二相机测量待测物体的3D形状。 该方法包括：使用数字图案投影仪将相移条纹图案投影到待测量对象的第一步骤;使用第一和第二相机中的每一个获取四个条纹图像的第二步骤，然后获取两个相位 使用莫尔技术的信息，以及第三步骤，使用两条相位信息获取满足用于使所有2pi模糊常数作为整数的立体相位条件的一对对应点，然后使用所述两个相位信息来测量对象的3D形状 对应点。