The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform

Klaus Schon - One of the best experts on this subject based on the ideXlab platform.

  • digital recorder impulse voltmeter and impulse calibrator
    2013
    Co-Authors: Klaus Schon
    Abstract:

    In most of the testing and calibration laboratories, digital recorders are used for recording the waveforms of impulse voltages and impulse currents. Other designations for such instruments are digital Oscilloscope, transient recorder and digitiser, with which even certain constructional and functional principles are associated. Analogue impulse Oscilloscopes, wherever necessary with storage screens or photographic recording, find only rarely application in modern test fields and will not be further discussed here. A waveform recorded with an Analogue Oscilloscope can be, in principle, converted into a digital data set, e.g., with the help of a special cathode ray tube with photosensitive diode matrix memory or a camera set-up with Analogue-digital image conversion; however, the errors while writing the signal with the electronic beam on the diode matrix or screen and during the final conversion are appreciably greater in comparison to the continuously improved digital recorders. The test voltage (peak value) is measured with impulse voltmeters, whereby even here digital techniques have replaced the Analogue circuits to a large extent. For regular verification and calibration of the measuring instruments, precise impulse calibrators are used which generate waveforms comparable with those of high-voltage and high-current impulses [1].

Sesar Danijela - One of the best experts on this subject based on the ideXlab platform.

  • PC as an Oscilloscope in teaching Physics
    Josip Juraj Strossmayer University of Osijek. Department of Physics. The Division of Experimental and Theoretical Physics. Division Chair of Experimnt, 2015
    Co-Authors: Sesar Danijela
    Abstract:

    Diplomski rad s temom Računalo kao osciloskop u nastavi fizike je podijeljen u tri dijela kojeg čine analogni osciloskop, digitalni osciloskop i demonstracijske vježbe. U prvom dijelu opisani su dijelovi analognog osciloskopa i njegov princip rada. Obuhvaćen je i povijesni pregled razvoja osciloskopa te osnovna građa osciloskopa, kao i sustav za horizontalni te vertikalni otklon. U drugom dijelu je opisan digitalni osciloskop, računalo kao osciloskop i softver Visual Analyzer. Zadnji dio diplomskog rada čine demonstracijske vježbe, izvedena na računalu, pomoću programa Visual Analyzer, koje se mogu primjenjivati u nastavi fizike. U svim demonstracijskim vježbama je navedena potrebna aparatura, postupak izvođenja vježbe kao i fizikalna podloga.My thesis on computer Oscilloscopes is divided into three main parts. The Analogue Oscilloscope,the digital Oscilloscope and experiments. The first part includes descriptions of the parts and work principle of the Analogue Oscilloscope. It also includes a overview of the history and basic structure of the Analogue Oscilloscope, as well as a description of systems for horizontal and vertical deflection. In the next part I describe the digital Oscilloscope, PC Oscilloscope and the software Visual Analyzer. The last part of my thesis contains experiments, used in teaching physics, performed on a PC Oscilloscope. In all of the presented experiments there is a description of the necessary equipment, the way in which they were performed and the foundation each experiment has in physics

Brnada Marijana - One of the best experts on this subject based on the ideXlab platform.

  • Measuring waveforms using digital instrument and Oscilloscope
    Josip Juraj Strossmayer University of Osijek. Faculty of Electrical Engineering Computer Science and Information Technology Osijek. Department of Elec, 2017
    Co-Authors: Brnada Marijana
    Abstract:

    Svaka periodična funkcija () može se prikazati pomoću Fourierovog reda kao suma sinusnih i kosinusnih članova čije su frekvencije cjelobrojni višekratnici osnovne frekvencije. Prije svakog mjerenja u laboratoriju bilo je potrebno matematički dobiti vrijednosti za svaki sinusni, pravokutni i trokutasti valni oblik. Sva mjerenja u laboratoriju obavljena su digitalnim osciloskopom, koji se svojim mogućnostima uvelike razlikuje od analognog osciloskopa. Za punjenje i pražnjenje RC člana, osim osciloskopa, korišteni su i istosmjerni izvor, mjerni instrument, kapacitivna i otpornička dekada. Dobiveni rezultati spremljeni su na računalo te su obrađeni pomoću Microsoft Excela.Every periodic function () can be represented through a Fourier series as the sum of the sine and cosine waves, whose frequencies are the integer multiples of the basic frequency. Prior to conducting laboratory measuring, it was necessary to calculate mathematical values for each sinusoidal, rectangular and triangular wave form. All measurements in the laboratory were performed by a digital Oscilloscope, which significantly differs from the Analogue Oscilloscope. For RC charging circuit and RC discharging circuit are, along with an Oscilloscope, used a DC source, a measurement instrument, a capacitance and a resistance decade box. All the results were saved to the computer and processed using Microsoft Exce

Nuno Sidonio Andrade Pereira - One of the best experts on this subject based on the ideXlab platform.

  • measuring the rc time constant with arduino
    Physics Education, 2016
    Co-Authors: Nuno Sidonio Andrade Pereira
    Abstract:

    In this work we use the Arduino UNO R3 open source hardware platform to assemble an experimental apparatus for the measurement of the time constant of an RC circuit. With adequate programming, the Arduino is used as a signal generator, a data acquisition system and a basic signal visualisation tool. Theoretical calculations are compared with direct observations from an Analogue Oscilloscope. Data processing and curve fitting is performed on a spreadsheet. The results obtained for the six RC test circuits are within the expected interval of values defined by the tolerance of the components. The hardware and software prove to be adequate to the proposed measurements and therefore adaptable to a laboratorial teaching and learning context.

M. B. Danailov - One of the best experts on this subject based on the ideXlab platform.

  • DEVELOPMENT OF MODE-LOCKED FEMTOSECOND ERBIUM DOPED FIBER LASER AND ITS SECOND HARMONIC GENERATION
    2009
    Co-Authors: P. Cinquegrana, Ivaylo P. Nikolov, R. Ivanov, P. Sigalotti, A. Demidovich, M. B. Danailov
    Abstract:

    An Erbium doped fiber laser oscillator emitting at 1560nm is developed. The laser is mode-locked with saturable absorber based on nonlinear polarization rotation. The measured cw threshold power is about 70mW and the power scaling efficiency is 13%. The maximum output power obtained is 40mW. The mode-locking is self starting and the stability is verified in millisecond, microsecond and nanosecond time scale of an Analogue Oscilloscope. The repetition rate is measured to be 80MHz. The pulse spectra have the characteristic side lobes of soliton mode-locking with a central lobe of width19nm. The temporal width of the pulse is measured by SHG intensity autocorrelation. The pulse width depends on the pump power. The width is about 130fs for the pump current of 800mA. The mode-locked pulse is not bandwidth limited, as is evident from the time bandwidth product. Extra-cavity second harmonic is generated in a BIBO crystal with efficiency of 1%. The intra-cavity second harmonic could not be generated as the SHG crystal disturbs mode-locking because of its birefringence properly