Skip navigation

A three dimensional vision system for industrial surface topography measurement

A three dimensional vision system for industrial surface topography measurement

Reynolds, Matthew C. (1990) A three dimensional vision system for industrial surface topography measurement. PhD thesis, Thames Polytechnic.

[img]
Preview
PDF
Matthew_C._Reynolds_1990.pdf - Published Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (3MB)

Abstract

This thesis is concerned with a research programme into a triangulation based Surface Topography Measurement (STM) system. The particular system investigated produces a series of three dimensional coordinates of points on a target surface which has been placed in front of the STM system. It is designed for use at long ranges (5m - 20m initially) and onto rough surfaces (a selection of natural materials with particle sizes up to 1cm). The system uses a laser triangulation method with a single spot projected onto the target surface and through movement of the spot over the surface a range map is built up. A simple model which describes the STM system is presented along with an equation which gives the range error, any effects on the model by the physical implementation of the STM system are then described and quantified. Performance tests carried out on the system are described and a second version of the system is then outlined which addresses deficiencies isolated in the original system. A more detailed discussion of how the range errors arise is also given. New hardware enables the received laser spot's distribution to be analysed and processed so that, in certain cases, subpixel resolution of the centre of the laser spot can be obtained. Expansion of the laser spot and varying the parameters of the optical system are examined to assess their effect over different target materials and estimates of the possible range accuracy are also given. These results presented will be used to assess the applicability of the system for use in an industrial environment. Further work connected to this research area and several industrial applications are also detailed.

Item Type: Thesis (PhD)
Additional Information: uk.bl.ethos.634033
Uncontrolled Keywords: surface topography measurement, optics
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Engineering
Last Modified: 14 Oct 2016 09:30
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/12874

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics