公开(公告)号：US06788210B1

公开(公告)日：2004-09-07

申请号：US10088133

申请日：2002-08-05

申请人： Peisen Huang ,  Qingying Hu ,  Fu-Pen Chiang

发明人： Peisen Huang ,  Qingying Hu ,  Fu-Pen Chiang

IPC分类号： G08B2100

CPC分类号： G06T17/10

摘要： A three dimensional surface contouring and ranging system (10) based on a digital fringe projection (18) and phase shifting technique is disclosed. In the system, three phase-shifted fringe patterns and an absolute phase mark pattern are used to determine the absolute phase map of the object (12). The phase map is then converted to the absolute x, y, and z coordinates of the object surface by a transformation algorithm. A calibration procedure is used to determine accurate values of system parameters required by the transformation algorithm. The parameters are initially indirectly measured through experiments to determine their approximate values. A calibration plate is then measured by the system at various positions. An iteration algorithm is then used to estimate the system parameters.

摘要翻译： 公开了一种基于数字边缘投影（18）和相移技术的三维表面轮廓和测距系统（10）。 在系统中，使用三个相移条纹图案和绝对相位标记图案来确定物体（12）的绝对相位图。 然后通过变换算法将相位图转换为物体表面的绝对x，y和z坐标。 校准过程用于确定变换算法所需的系统参数的准确值。 最初通过实验间接测量参数以确定它们的近似值。 然后通过系统在不同位置测量校准板。 然后使用迭代算法来估计系统参数。

公开(公告)号：US5418611A

公开(公告)日：1995-05-23

申请号：US77302

申请日：1993-06-14

申请人： Peisen Huang ,  Jun Ni

发明人： Peisen Huang ,  Jun Ni

IPC分类号： G01B11/26

CPC分类号： G01B11/26

摘要： A high resolution, compact size and low cost multi-degree-of-freedom geometric error measurement system for simultaneously measuring four geometric errors, horizontal straightness, vertical straightness, pitch and yaw. The pitch and yaw error measurements are based on a new method of angle measurement in turn based on the internal reflection effect at an air/glass boundary. The method uses a differential detection scheme to largely reduce the inherent non-linearity of the reflectance versus the angle of incidence in internal reflection. With non-linearity reduced, the displacement of the angle of incidence can be determined accurately by measuring the reflectance. The resolution and measurement range are determined by the initial angle of incidence, the polarization state of light, and the number of reflections. Compared with interferometers and autocollimators, this method has the advantage of a simple sensor design for applications ranging from very wide measurement range to extremely high resolution. Apparatus for accomplishing the method comprises a beamsplitter, a pair of critical angle prisms and a pair of photodiodes. Each photodiode measures change in reflectance and with the application of suitable computation means produces an angle measurement of the beam incident to the beamsplitter. The horizontal and vertical straightness are based on a laser alignment technique utilizing a reference beam input through a single-mode fiber beam delivery system. The pointing stability of the beam is thereby significantly improved. As an illustrative example the system is applied to a machine tool slide.

摘要翻译： 高分辨率，紧凑的尺寸和低成本的多自由度几何误差测量系统，用于同时测量四个几何误差，水平直线度，垂直平直度，俯仰和偏航。 基于在空气/玻璃边界处的内部反射效应，俯仰和偏航误差测量依次基于角度测量的新方法。 该方法使用差分检测方案大大降低反射率与内部反射中入射角的固有非线性关系。 随着非线性的降低，可以通过测量反射率来准确地确定入射角的位移。 分辨率和测量范围由初始入射角，光的偏振状态和反射次数决定。 与干涉仪和自动准直仪相比，该方法具有传感器设计简单的优点，适用范围从非常宽的测量范围到极高的分辨率。 用于实现该方法的装置包括分束器，一对临界角棱镜和一对光电二极管。 每个光电二极管测量反射率的变化，并且适用的计算装置的应用产生入射到分束器的光束的角度测量。 水平和垂直平直度基于利用通过单模光纤束输送系统输入的参考光束的激光对准技术。 因此，光束的指向稳定性显着提高。 作为说明性示例，该系统被应用于机床滑块。

公开(公告)号：US20070115484A1

公开(公告)日：2007-05-24

申请号：US11552520

申请日：2006-10-24

申请人： Peisen Huang ,  Song Zhang

发明人： Peisen Huang ,  Song Zhang

IPC分类号： G01B11/30

CPC分类号： G01B11/2527 ,  G01B11/2504

摘要： A structured light system for object ranging/measurement is disclosed that implements a trapezoidal-based phase-shifting function with intensity ratio modeling using sinusoidal intensity-varied fringe patterns to accommodate for defocus error. The structured light system includes a light projector constructed to project at least three sinusoidal intensity-varied fringe patterns onto an object that are each phase shifted with respect to the others, a camera for capturing the at least three intensity-varied phase-shifted fringe patterns as they are reflected from the object and a system processor in electrical communication with the light projector and camera for generating the at least three fringe patterns, shifting the patterns in phase and providing the patterns to the projector, wherein the projector projects the at least three phase-shifted fringe patterns sequentially, wherein the camera captures the patterns as reflected from the object and wherein the system processor processes the captured patterns to generate object coordinates.

摘要翻译： 公开了一种用于物体测距/测量的结构化光系统，其实现了使用正弦强度变化条纹图案的强度比建模的基于梯形的相移函数，以适应散焦误差。 结构化光系统包括一个投影仪，其被构造成将至少三个正弦曲线强度变化的条纹图案投影到相对于其它相移的物体上;相机，用于捕获至少三个强度变化的相移条纹图案 因为它们从物体反射并且与光投影仪和照相机电通信的系统处理器用于产生至少三个条纹图案，同步地移动图案并将图案提供给投影仪，其中投影仪投影至少三个 顺序地移相条纹图案，其中相机捕获从对象反射的图案，并且其中系统处理器处理所捕获的图案以生成对象坐标。

公开(公告)号：US5220397A

公开(公告)日：1993-06-15

申请号：US857380

申请日：1992-03-25

申请人： Peisen Huang ,  Satoshi Kiyono

发明人： Peisen Huang ,  Satoshi Kiyono

IPC分类号： G01B11/26

CPC分类号： G01B11/26

摘要： A new method of angle measurement is based on the internal reflection effect at an air/glass boundary. The method uses a differential detection scheme to largely reduce the inherent non-linearity of the reflectance versus the angle of incidence in internal reflection. With non-linearity reduced, the displacement of the angle of incidence can be determined accurately by measuring the reflectance. The resolution and measurement range are determined by the initial angle of incidence, the polarization state of light, and the number of reflections. Compared with interferometers and autocollimators, this method has the advantage of a simple sensor design for applications ranging from very wide measurement range to extremely high resolution. Apparatus for accomplishing the method comprises a beamsplitter, a pair of critical angle prisms and a pair of photodiodes. Each photodiode measures change in reflectance and with the application of suitable computation means produces an angle measurement of the beam incident to the beamsplitter.

摘要翻译： 一种新的角度测量方法是基于空气/玻璃边界的内部反射效应。 该方法使用差分检测方案大大降低反射率与内部反射中入射角的固有非线性关系。 随着非线性的降低，可以通过测量反射率来准确地确定入射角的位移。 分辨率和测量范围由初始入射角，光的偏振状态和反射次数决定。 与干涉仪和自动准直仪相比，该方法具有传感器设计简单的优点，适用范围从非常宽的测量范围到极高的分辨率。 用于实现该方法的装置包括分束器，一对临界角棱镜和一对光电二极管。 每个光电二极管测量反射率的变化，并且适用的计算装置的应用产生入射到分束器的光束的角度测量。