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High Quality Non-contact Measurement Using Capacitance Gauges

  • J. M. Hale
  • H. Walton
  • G. McCarten

Abstract

This paper describes a series of tests designed to demonstrate the ability of small capacitance gauges to detect and measure surface defects.

Results are presented of two sets of tests:
  1. (a)

    Scans across rectangular grooves of various dimensions.

     
  2. (b)

    A three dimensional raster scan image of an actual defect caused by dry rubbing.

     
The results obtained are compared with equivalents obtainable using a conventional Talysurf gauge. A trade off is demonstrated between the blurring of fine detail caused by the capacitance gauge and the advantage of noncontact measurement.

Keywords

Electrostatic Field Depth Ratio Deep Groof Stylus Measurement Noncontact Measurement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A Novel High Temperature Transducer System Based on a Differential Charge Amplifier. H Walton IEE Coloquium on Electrical Transducers for Measurement of Mechanical Quantities. February 1971.Google Scholar
  2. 2.
    Capacitance Transducer Applications H Walton Transducer Technology Vol 1 No. 5 July/August 1979.Google Scholar

Copyright information

© Kogan Page Ltd. 1989

Authors and Affiliations

  • J. M. Hale
    • 1
  • H. Walton
    • 1
  • G. McCarten
    • 1
  1. 1.UKAEA — Windscale LaboratoryUK

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