Optical granulometry systems like WipFrag are required to measure fragments in situ. That is to say, the fragments are in piles where sorting takes place, where fragments are partially overlapped, and where fines may not be seen because they fall in and behind the coarser fragments, or where the fines are simply too small to be seen. As a result, optical systems tend typically to overestimate the size of the distribution, and underestimate the variability of the distribution. The wider the size distribution being measured, the more severe the problem is. This paper presents the results of a study that suggests that these systematic errors can be significantly reduced by calibration.
N. H. Maerz and W. Zhou, "Calibration of Optical Digital Fragmentation Measuring Systems," Fragblast, The International Journal For Blasting and Fragmentation, vol. 4, no. 2, pp. 126-138, Taylor & Francis, Jun 2000.
The definitive version is available at http://dx.doi.org/10.1076/frag.22.214.171.12450
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Calibration; Numerical analysis; Piles; Granulometry systems; Optical systems; Blasting; Fragmentation; Imaging method
International Standard Serial Number (ISSN)
Article - Journal
© 2000 Taylor & Francis, All rights reserved.