Tehnički vjesnik, Vol. 19 No. 2, 2012.
Izvorni znanstveni članak
Parallax in a dynamic, non-contact & non-destructive, precise length measurement
Josip Stepanić
; University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, I. Lučića 1, HR-10000 Zagreb, Croatia
Srđan Medić
; Karlovac University of Applied Sciences, I. Meštrovića 10, HR-47000 Karlovac, Croatia
Živko Kondić
; Varaždin University of Applied Sciences, J. Križanića 33/6, HR-42000 Varaždin, Croatia
Sažetak
If a dimensional measurement on an object is to be performed during its non-perturbed motion, a specific approach is needed. In this article we consider length measurement of an object based on photographs of the object during its unperturbed motion. The main obstacle for determining measured length is the parallax which is generated as a convolution of contributions occurring in different parts of a measuring system. The quantitative expressions for the parallax are derived, and applied onto processing of the photos. As a result, we derive in a closed form the algorithm for quantitative estimates of the precisely measured length and accompanied standard deviation.
Ključne riječi
length measurement; motion; non-contact measurement; non-destructive measurement; parallax; perturbation
Hrčak ID:
83905
URI
Datum izdavanja:
29.6.2012.
Posjeta: 1.700 *