Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Report on the topic: “Problems of using reference methods to measure shape contours and surface waviness"

Adamczak Stanisław, Stępień Krzysztof, Zmarzły Paweł, Mathia Thomas G.

Mechanik

2020

R. 93, nr 3

50--52, 54--60

The paper discusses the state-of-the-art on research and development of activities relating to wider application of datum-based methods in the field of measurements of surface texture of machine parts. Despite the fact that datum-based methods are well-known, in hitherto practice their application area has been limited. Research activities carried out by authors indicate that datum-based methods can be very useful as a part of computer-aided measurement systems allowing conducting measurements directly on a machine tool (in-situ measurements). One of the results of the research work conducted by authors was proving that datum-based methods can be applied to evaluate cylindricity deviations and, with some limitations, to evaluate surface waviness of machine parts.

Przedstawiono obecny stan badań i prac rozwojowych dotyczących szerszego wykorzystania metod odniesieniowych do pomiarów struktury geometrycznej powierzchni. Chociaż metody te są znane, to dotychczas były stosowane w ograniczonym zakresie. Przeprowadzone prace wykazały dużą przydatność tych metod w skomputeryzowanych systemach kontroli elementów w trakcie realizacji procesu bezpośrednio na stanowiskach wytwórczych, a nawet bezpośrednio na obrabiarce. Efektem badań przeprowadzonych przez autorów było m.in. wykazanie, że metody odniesieniowe mogą być stosowane do oceny zarysu walcowości i w pewnym ograniczonym zakresie – do kontroli falistości powierzchni.

Morphological discrimination of granular materials by measurement of pixel intensity distribution (PID)

Wójcik Artur, Kościelniak Piotr, Mazur Marcin, Mathia Thomas G.

Metrology and Measurement Systems

2019

Vol. 26, nr 2

297--308

The paper provides statistical analysis of the photographs of four various granular materials (peas, pellets, triticale, wood chips). For analysis, the (parametric) ANOVA and the (nonparametric) Kruskal-Wallis tests were applied. Additionally, the (parametric) two-sample t-test and (non-parametric) Wilcoxon Rank-Sum Test for pairwise comparisons were performed. In each case, the Bonferroni correction was used. The analysis shows a statistical evidence of the presence of differences between the respective average discrete pixel intensity distributions (PID), induced by the histograms in each group of photos, which cannot be explained only by the existing differences among single granules of different materials. The proposed approach may contribute to the development of a fast inspection method for comparison and discrimination of granular materials differing from the reference material, in the production process.