Three ranges of Rockwell scale C reference hardness blocks: 20, 40, and 60 HRC were measured by deadweight-lever system hardness testing machine with two types of display: analog and digital. The testing machines were placed on the vibration table, whose frequency and amplitude of vibration can be controlled. Piezoelectric probe and vibration meter were used to confirm both amplitude and frequency of vibration. The hardness value at free from vibration is used as a reference to calculate the error of each hardness measurement at certain frequency and amplitude. Both machines give the same...
The paper is related to von Karman vortex shedding phenomenon being the basis of the vortex flow meter design. The vortex convection velocity belongs to the problems rather rarely touched on in papers and articles. But its recognition can improve our knowledge concerned the applied phenomenon and finally help in its better understanding. Due to the flow visualization supported by the image processing, tracking of the vortices is feasible. Finally, the convection velocity can be calculated and its changeability along the pipe axis can be evaluated.
Road traffic has important part for the every days life. Traffic accidents are related to the vehicles technical side and to the traffic surveillance from authorities and police. Environment is damaged mainly through vehicles exhaust gases, noise and vibration. This study work deals with road traffic safety measurements uncertainties. Damages can be minimised if uncertainties of the measurements are estimated and taken into account by above areas. In this work will be given models of uncertainty estimation for the vehicles technical conditions measurements, environment safety measurements...
The aim of this article is to describe a feedback circuit with thermoresistive sensor based on thermal sigma-delta modulator. The circuit uses 1-bit first order sigma-delta modulator in which a considerable part of conversion functions is performed by the sensor. This transducer circuit is able to measure digital physical quantities that interact with the sensor: temperature, thermal radiation and fluid velocity. In this study, it is used to measure environment temperature, on which digital output is linearly dependent. Equations that support circuit behaviour, simulation results and...
The students of automation and robotics, electronic and telecommunication are preparing their master's theses in Measurement Systems Group of Institute of Automatic Control. They also include the projecting and constructing of measuring instruments and measuring systems. These are dedicated to the laboratories in the Institute, as well for industry. The pocket radiometer was projected and constructed. It consists of the primary device with Geiger-Müller counter, the secondary device and of the power supply. The radiometer has series connections RS232C. The calibration stand for rotameters...
Challenges of New Technologies · TC1 · 2002 · Download
In the new millennium the change of technological and technique generations occurs in a temp unprecedented earlier. Therefore in order to train high-qualified engineers able to quickly, efficiently react to society’s new needs it is necessary for them to upgrade their knowledge permanently. Indicators consumption increase both in quantity and in nomenclature needs an acceleration of production rate owing to automation of design process. The problem is that a description of various physical processes on which the principle of indicators action is based, is being carried out with the use of...
Challenges of New Technologies · TC1 · 2002 · Download
The measurements of non-electric quantities with electric methods have a long-standing tradition at the Silesian University of Technology. In this paper we would like to present the main idea and topics of the lectures and briefly describe the laboratory exercises. We also discuss the plans for the future.
Challenges of New Technologies · TC1 · 2002 · Download
The students of the Department of Automatic Control, Electronics and Computer Science are preparing their master's theses in Measurement Systems Group of Institute of Automatic Control. They include the experimental investigations in Institute laboratory of various measuring instruments and also the mathematical modelling of primary devices of flowmeters and other instruments. Some results of master's theses were published in Polish scientific newspapers and in international conference proceedings. The measurement system for identification dynamic model of thermometers by "in-situ" method...
Challenges of New Technologies · TC1 · 2002 · Download
This paper describes the extensional function of user navigation interface of virtual measuring instruments which supports user’s self-learning in experiment. The extensional function is presented by representation of knowledge database through internet browser. It is very effective for user to learn and investigation the knowledge of measurement engineering with training of operation of real or virtual measuring instruments in experience. The knowledge exploration by hyperlink through HTTP presents new heuristic learning method for user comparing with systematical learning method by lecture.
Challenges of New Technologies · TC1 · 2002 · Download
Ludwik Referowski, Ryszard Roskosz, Dariusz Swisulski
In the paper are presented the possibilities of preparations modern, educational tools which in the form of virtual instruments are very helpful for educational process in electrical measurements. These dynamic instruments enable to perform during the lectures demonstrations which explain better lectured theory of electrical measurements, especially when some kinds of phenomena are presented in slow down time scale. Another group of virtual instruments enable to simulate measuring sessions which are realized later in the university laboratory. The third group of virtual instruments explain...
Challenges of New Technologies · TC1 · 2002 · Download