Application of digital image analysis method in metric screw thread metrology

  • Joshua Mutambi
  • Yu Li-jun 
Electromechanical Engineering
Received:
Revised:

Abstract

This paper describes the use of computer-aided measurement for external metric screw threads. Thread parameters, including thread pitch, thread angle, pitch diameter and major diameter, were measured with CCD cameras and image analysis software. New technologies such as digital image processing were used to increase the efficiency of measurements. In this study, by reconstructing the toolmaker’s microscope, the computer-aided semi-automated measuring system was developed, which could evaluate the accuracy of screw thread profile. It is concluded that the measurement accuracy is comparable to that of traditional toolmaker’s microscope method.

Key words

screw threads quality inspection accuracy digital image processing 
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Copyright information

© Shanghai University 2004

Authors and Affiliations

  • Joshua Mutambi
    • 1
  • Yu Li-jun 
    • 1
  1. 1.School of Electromechanical Engineering and AutomationShanghai UniversityShanghaiP.R. China

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