THE DEPENDENCE OF BRASS HARDNESS MEASUREMENT SYSTEM ON TIME
Journal Title: Metrology and Measurement Systems - Year 2007, Vol 14, Issue 4
Abstract
Measurement system analysis (MSA) was used for estimation of hardness (HBS) measure- ment system capability. The time dependence of capability was evaluated. Experimental material Cu-Zn-Al cast alloy was used as shape memory alloy. The average and range method with 2 appraisers, 10 samples and 3 trials (indentations). was used to quantify repeatability (% EV), reproducibility (% AV) and part variation (% PV - variation between samples). The measurement was repeated 5 times in intervals of 7 days. As the values of %GRR are between 89.4% and 63.7% and values of "ndc" between 0.71 and 1.71 the used hardness measurement system is not capable and it depends heavily on the long-term variability.
Authors and Affiliations
JOZEF PETRÍK, VOJTECH ŠPETUCH
DYNAMIC MEASUREMENT OF THE CURVE y(x) DEFINED BY PARAMETRIC RELATIONS x(t), y(t) UNDER RANDOM DISTURBANCES
Analog XY-recorders constructed as servomechanisms with sliding motion have been practically out of use for some time. Drawing the curve y(x) defined by parametric relations xz(t), yz(t) under additive, random disturbanc...
DATA FUSION APPLICATIONS IN THE TRAFFIC PARAMETERS MEASUREMENT
In the paper the problem of measuring road traffic parameters using systems with complex algorithms for measurement data processing is discussed. A characteristic feature of these systems is utilising there data fusion m...
DIGITAL-TO-ANALOG CONVERSION USING DELTA-SIGMA MODULATORS IMPLEMENTED IN VIRTEX-4 FPGA DEVICES
This paper presents some selected architectures of delta-sigma modulators which are suitable for implementation of digital-to-analog converters (DACs) in modern FPGA devices. Simulation and implementation of simple archi...
THE DEPENDENCE OF BRASS HARDNESS MEASUREMENT SYSTEM ON TIME
Measurement system analysis (MSA) was used for estimation of hardness (HBS) measure- ment system capability. The time dependence of capability was evaluated. Experimental material Cu-Zn-Al cast alloy was used as shape me...
THE INFLUENCE OF FITTING ALGORITHM AND SCANNING SPEED ON ROUNDNESS ERROR FOR 50 mm STANDARD RING MEASUREMENT USING CMM
Coordinate Measuring Machines (CMM) become one of the main requirements in precision engineering for advanced industries, troubleshooting and scientific facilities. CMM data analysis software can contribute significantly...