Present-day measurement is oriented to processing digital signals, that is sequences of quantized samples of analog signal. Processing is performed by means of combinations of standard and special numerical algorithms. Knowledge of the basic signal processing algorithms is therefore necessary for successful design of complete algorithm for a given measurement task. The contribution shows a modern mean of teaching basic signal processing algorithms used in measurement without forcing students to come to computer laboratory. Students need only to have at their disposal a computer provided with...
Due to growing classes, reduced availability of tutors and shortage of time to be devoted to experimental activities, there is a need of finding a mandatory way ofperforming laboratory sessions. The advanced technologies allowing for a massive use of remote driven instruments could improve the quality of the experiments especially for what concerns the very specific high-level classes. In order to give flexibility and high performances to the educational tool a user friendly virtual instrument has been realised: it allows the choice of boot the experiment to be performed by the user and the...
Quality test for neutral electrodes (grounding plates used in electrosurgical operations) with volunteers and thermo cameras are difficult to perform and expensive. A new test device “electronic skin” simulates the relevant electrical features of human skin. The starting point of development was a model calculation of the human thigh and the resultant current densities and power losses causing the temperature increase. From these findings the electronic skin was developed. This device consists of a three dimensional resistor network representing the various skin layers and muscle tissue, and...
Programmable logic seems to be a future of the digital design. To acquaint students with this technology, a new subject was prepared to fill the blank space in their knowledge. The laboratory practice is primarily focused on applications in instrumentation and is supported by newly designed development boards, which contain most of the components necessary for student’s designs. This paper briefly describes approaches and teaching methods and demonstrates them on selected laboratory projects.
Application of the computer-controlled methods of measurements in laboratory exercises within the course "Measurements in Electrical Engineering" (MUE) is presented. In the experiment, which accomplishes the basic statistical analysis of the measurement results, a computer is used for processing the data obtained by the digital multimeter (DMM) connected to the computer, as well as for necessary calculations. Another experiment is used to test the response of different types of DMMs in measuring ac voltages. Thus, the computer serves as an ac calibrator supplying the chosen waveform to the...
Changes in study programmes at the Czech Technical University in Prague based on the Bologna declaration concern also the education of Measurement and Instrumentation. The bachelor stage and the master stage are strictly separated in the new study plans. The amount of theoretical courses going before technological courses rapidly decrease in the bachelor stage. It requires both to change the teaching method and to skip some theoretically exacting parts. The change of the whole structure leads also to the reduction of an extent of all courses. The new conception leads also to the changes in...
The paper presents a theoretical analysis and experimental verification of the temperature effects in electro-optic sensor with cubic crystals and naturaly birefringent crystals. New compensation methods, based on an optimal optical alignment, have been proposed and experimentally verified.
The paper presents a remotely accessible laboratory realised for didactic aims at the University of Sannio, Italy. The laboratory is based on a software framework, with modularity characteristics that allows the insertion of new applications or the modification of the realised ones. Thanking to its implementation in Java and C++ with a CORBA communication layer, some instruments have been made available to the students of electronic measurements courses through a simple web browser in the form of Virtual Instruments.
The aim of “Measurement in Electrical Engineering“ course, Faculty of Electrical Engineering and Computing in Zagreb, is to give students fundamental knowledge of metrology and measurement of Electrical Quantities. For students, laboratory practicum is good way to understand and to confirm theoretical part of the subject. Also, by real instruments and devices students are practically acquainted with the certain number of rocedures and methods for measuring electrical and some nonelectrical quantities. Structure, organisation and themes of laboratory exercises are briefly presented in this...
In the process of data acquisition the analogic gain is usually determined by the peak value of the input ignal. For all samples the quantization error is theoretically less than 1/2 LSB. However for samples having small value, the relative error due to the quantization is high, and it goes higher with the decreasing of the sample value. The relative measuring error can be reduced by dynamically setting the proper gain [1]. This is usually achieved with a supplementary hardware arrangement. The solution was proposed in [1] and consists in a numeric algorithm, developed in LabView, which...