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1. 发明授权

US5671541A Accuracy verification devices for coordinate measuring machines 失效
标题翻译：坐标测量机精度验证装置
公开(公告)号：US5671541A
公开(公告)日：1997-09-30
申请号：US523048
申请日：1995-09-01
申请人： YuZhong Dai , Thomas Charlton, Jr.
发明人： YuZhong Dai , Thomas Charlton, Jr.
IPC分类号： G01B3/30 , G01B21/04
CPC分类号： G01B3/30 , G01B21/042
摘要： Devices for verifying the dimensional accuracy of a measuring instrument are provided. In one embodiment, a verification block has a substantially planar surface and a known nonplanar surface adjacent thereto. During verification, a probe attached to the CMM moves along the nonplanar surface while simultaneously contacting the planar surface and measures the features of the nonplanar surface. Any difference between the measured features and the known features of the nonplanar surface is an indication of inaccuracies in the CMM. Other embodiments of the invention include structures which compare CMM measured readings with known readings by an encoder as it moves along a linear scale. In another embodiment, the measured readings are compared to readings provided by opto-electric switches. In still another embodiment, a cam is rotatably mounted to the end of the probe of the CMM and moves the probe along the z axis as the cam moves along a surface. A predicted period based on the known cam geometry is compared to the period of motion measured by the CMM. Any difference between the measured period and the actual period is an indication of inaccuracies in the CMM.
摘要翻译：提供了用于验证测量仪器的尺寸精度的装置。在一个实施例中，验证块具有基本平坦的表面和与其相邻的已知的非平面表面。在验证期间，附接到CMM的探头沿非平面移动，同时接触平面并测量非平面表面的特征。测量特征与非平面表面的已知特征之间的任何差异表明CMM中的不准确性。本发明的其它实施例包括当CMM测量读数与沿着线性刻度移动时由编码器与已知读数进行比较的结构。在另一个实施例中，将测量的读数与由光电开关提供的读数进行比较。在另一个实施例中，凸轮可旋转地安装到CMM的探针的端部，并且随着凸轮沿着表面移动，使探针沿z轴移动。将基于已知凸轮几何形状的预测周期与由CMM测量的运动周期进行比较。测量期间和实际周期之间的任何差异表明CMM中的不准确。

2. 发明授权

US5669150A Coordinate measuring machine having articulated arm 失效
标题翻译：坐标测量机具有铰接臂
公开(公告)号：US5669150A
公开(公告)日：1997-09-23
申请号：US748052
申请日：1996-11-12
申请人： Raymond J. Guertin , YuZhong Dai , Vitaly Pesikov , Walter L. Beckwith, Jr. , Thomas Charlton, Jr.
发明人： Raymond J. Guertin , YuZhong Dai , Vitaly Pesikov , Walter L. Beckwith, Jr. , Thomas Charlton, Jr.
IPC分类号： G01B5/00 , G01B5/008 , G01B7/00
CPC分类号： G01B5/008
摘要： A coordinate measuring machine includes a support structure, an articulated arm having a first end pivotally connected to the support structure and a second end that is movable in a horizontal plane. A Z-ram assembly is mounted to the second end of the articulated arm. The Z-ram assembly includes a Z-ram housing and a probe that is vertically movable with respect to the Z-ram housing. The probe is movable within a measurement volume defined by the articulated arm and the Z-ram assembly. The coordinate measuring machine further includes a measuring assembly for determining coordinates of the probe in the measurement volume. The articulated arm preferably includes first and second arm assemblies that have a parallelogram configuration to prevent substantial rotation of the Z-ram assembly as the articulated arm is moved in the horizontal plane. The angles of the articulated arm are preferably measured using a sensor which includes a pattern of parallel, straight grating lines.
摘要翻译：坐标测量机包括支撑结构，铰接臂具有枢转地连接到支撑结构的第一端和可在水平面中移动的第二端。 Z型活塞组件安装在铰接臂的第二端。 Z-ram组件包括一个Z-ram壳体和一个相对于Z-ram壳体可垂直移动的探头。探头可以在由关节臂和Z-ram组件限定的测量体积内移动。坐标测量机还包括用于确定探测器在测量体积中的坐标的测量组件。铰接臂优选地包括具有平行四边形构造的第一和第二臂组件，以防止当铰接臂在水平面中移动时Z压头组件的实质旋转。关节臂的角度优选使用包括平行的直线格栅线的图案的传感器来测量。

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