Method for assessing measurement uncertainty of coordinate measuring machine

A technology for measuring uncertainty, coordinate measuring machine, used in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2015-02-25
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for evaluating the measurement uncertainty of a coordinate measuring m

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  • Method for assessing measurement uncertainty of coordinate measuring machine
  • Method for assessing measurement uncertainty of coordinate measuring machine
  • Method for assessing measurement uncertainty of coordinate measuring machine

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specific Embodiment approach

[0188] Combine below figure 2 And the actual measurement situation in the laboratory will further illustrate the specific embodiment of the present invention. It should be noted that the description of the following embodiments is used to help explain and understand the present invention, and does not constitute a limitation to the present invention. The specific implementation method comprises the following specific steps:

[0189] 1) Place the workpiece under test in the laboratory at a constant temperature (not less than 8 hours); turn on the three-coordinate measuring machine; record the ambient temperature in the laboratory; clean the workpiece under test, workbench, calibration ball and probe; calibrate the probe; Clamp the workpiece.

[0190] 2) Calibration of coordinate measuring machine measurement stability

[0191] The measured parameter is measured once by the same surveyor. Keep the measurement environment unchanged, keep the coordinate measuring machine in w...

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Abstract

The invention discloses a method for assessing measurement uncertainty of a coordinate measuring machine. The method of avoiding the complex relation among error sources of the coronate measuring machine and unknown transmission rules between the error sources is adopted, the method of analyzing characteristic indexes of a measurement system of the coordinate measuring machine is adopted, the method and approach of verifying or obtaining corresponding system characteristic index values of the measurement system, an integral calibration method and a detail experiment scheme for obtaining a stability index and a reproducibility index of the coordinate measuring machine are designed, the influence degree of actual temperature in temperature compensation, a standard grating rule and a linear expansion coefficient of a tested workpiece on a measurement result is considered, and the relatively integral measurement uncertainty of the coordinate measuring machine is obtained through synthesis in the root of square sum.

Description

technical field [0001] The invention relates to the field of evaluation of the uncertainty of a coordinate measuring machine, in particular to a method for evaluating the uncertainty of a coordinate measuring machine. Background technique [0002] Coordinate Measuring Machine (CMM) is an efficient and multifunctional precision measuring instrument integrating mechanics, optics, electricity, computer technology and control theory, which can detect geometric quantities such as size, angle, shape and position. Compared with conventional geometric quantity measuring instruments, the superior performance of coordinate measuring machines is reflected in: a variety of measurement objects, that is, strong versatility; high measurement accuracy, accurate and reliable data; complex measurement, high degree of automation, The measurement efficiency is very high. The current coordinate measuring technology has developed relatively maturely. Coordinate measuring machines are widely used...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 陈晓怀程银宝王汉斌徐磊姜瑞
Owner HEFEI UNIV OF TECH
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