Geometric measurement is a traditional measurement item, and the "Belt and Road" National Measurement and Testing Research Center (Shaanxi) has the highest measurement standard for length measurement in Northwest China. For the complex shape and high measurement accuracy requirements of various parts and tooling, the center purchased and installed the international leading level of composite coordinate measuring machine, which can carry out both contact and non-contact measurement methods, and formed the relevant technical capabilities.
ØComposite Optical Coordinate Measuring Machine
· Manufacturer：Werth Messtechnik GmbH
· Model：Video Check 663
· Measurement Range：x600 y650 z300
· Measurement accuracy and measurement method
nOptical Image Measurement
X, Y single-axis dimensional measurement of the indicated value of error：Ex、Ey=（0.5＋L/500）μm；
XY plane dimension measurement error：Exy=（0.75＋L/400）μm；
XYZ spatial dimension measurement error：Exyz=（1.5＋L/300）μm；
nImage probe size measurement error: EV: 0.75μm
nProbe measurement: Probe measurement error: MPEP=1.5μm
nSelf-emitting fiber measurement: maximum permissible detection error: MPEP=1.5μm
nCoaxial point laser measurement: the maximum allowable measurement error: Plz = 1.5μm
ØCoordinate measuring machines
· Manufacturer Leitz
· Model: Leitz LEITZ INFINITY 12.10.7
· Measuring range: x1200 y1000 z700
· Measurement accuracy: (0.3 + L/1000) μm
几何量测量是一个传统的测量项目，“一带一路”国家计量测试研究中心（陕西）保存有中国西北地区长度测量的最高计量标准。针对形状复杂且测量精度要求高各类零件、工装，我中心购置安装国际领先水平，可同时开展接触式和非接触式测量方法的复合型三坐标测量机并形成相关技术能力。
Ø 复合型光学三坐标测量机
· 生产商：Werth Messtechnik GmbH
· 型 号：Video Check 663
· 测量范围：x600 y650 z300
· 测量精度及测量方法：
n 光学影响测量
X、Y单轴尺寸测量示值误差：Ex、Ey=（0.5＋L/500）μm
XY平面尺寸测量示值误差：Exy=（0.75＋L/400）μm；
XYZ空间尺寸测量示值误差：Exyz=（1.5＋L/300）μm；
n 影像测头尺寸测量误差：EV：0.75μm
n 探针测量： 探针测量误差：MPEP=1.5μm
n 自发光光纤测量：最大允许探测误差：MPEP=1.5μm
n 同轴点激光测量：最大允许测量误差：Plz=1.5μm
Ø 三坐标测量机
· 生产厂家 Leitz
· 型号：Leitz LEITZ INFINITY 12.10.7
· 测量范围： x1200 y1000 z700
· 测量精度：（0.3＋L/1000）μm