Abstract
III
Abstract
Wear is one of the three basic contents of Tribology, in modern industrial societies,
there are signs of wear either in light or heavy industry, and losses which were caused by
wear is enormous, so study part of the wear pattern and development method of abrasion
test for improving component life and reliability is extremely important. This paper
introduced traditional and existing measurement methods, take ring wear which was
produced by pin-on-disk wear testing machine as example, we introduced two methods of
measuring wear width, one is painting line measurement method, the other one is
projection measurement method. And we have done more continue expand researches
about projection measurement method, the research achievements are mainly as follows:
(1) Firstly, we introduced the research at home and abroad about wear measurement,
summarized traditional and existing of measurement methods, and described in detail the
advantages and disadvantages of each method.
(2) We designed a set of preprocessing method before using the projection
measurement method. First, we accomplished color image gray processing, then, we used
different threshold methods process the gray image, and compared the results to choose the
best threshold methods, finally we chose Otsu threshold methods to obtain the binary
image. The segmentation was completed by morphology operations and we got the image
that highlighted the wear region, Final projection method is used to measure the wear
width, compared to scale method, projection method are more accurate without human
intervention.
(3) Using both measuring methods, projection method and visual analogue scale,
projection measuring process more complicated than visual analogue scale, but to irregular
shape wear, projection method is better than the visual analogue scale and projection
method are more accurate. Based on MATLAB GUI pack a wear scar measurement
software, including files, images, grayscale, threshold segmentation, mathematical
morphology, wear scar width measurement and wear scar measurement of area of six
modules, the software is able to realize rapid measurement of wear scar width and area. We
