Member Prof. Saša Vlahinić

Email address sasa.vlahinic@riteh.uniri.hr Telephone +385 51 651447, int. 2447 (Office) Location 1-11

Head postdoc. Ivan Markovinović

Email address ivan.markovinovic@riteh.uniri.hr Telephone +385 51 505720, int. 2598 Location L13-250

Researchers:

Prof. dr. sc. Nino Stojković

Asist. Ivan Markovinović

Asist. Zoran Šverko

Field of expertise

The researches done by the members of laboratory can be classifed in two different fields: power systems measurements and biomedical measurements and general instrumentation.

Expertise in power systems measurements include:

• measurements of harmonic distortion
• application of synchrophasor measurements for detection of abnormal system states
• diagnostics and troubleshooting in electric power systems
• diagnostics of power transformers (tan delta), cables (partial discharges) and power system protection
• localization of power system disturbances

Expertise in biomedical measurements and general instrumentation include:

• EEG signal analyses
  • spectral analyses
  • application of ICA
  • artefact removal
  • P300 detection
• application of spectral analyses in neurofeedback applications
• BCI based on EEG
• analog signal processing

Laboratory equipment

Laboratory inventory includes measurement equipment for electric and electronic measurements. The equipment is used for education, research and for implementation of projects in collaboration with industry.

Equipment for power and voltage quality measurements

Metrel Power Quality Analyzer MI 2292

Instrument for power quality measurements. Device characteristics:

• 3 voltage channels, 0 ÷ 900 Vrms
• 3 current channels, CT 5A/1V, 100A/1V, C173 1/10/100A/1V
• Power quality measurement according to IEC 61000-4-30
• Voltage quality measurement according to EN50160

Power Quality Analyzer – STER

Instrument for power quality measurements. Device characteristics:

• 4 voltage channels, 0 ÷ 1000 Vrms, CAT III / 1000 V
• 4 current channels, “Flex Current Clamps” 30/300/3000 A
• Power quality measurement according to IEC 61000-4-30 Class S/A
• Voltage quality measurement according to EN50160
• Power measurement according to IEC 61557-12 i IEEE 1448

NEXUS 1500

Advance energy meter with power quality measurement functions. Device characteristics:

• 4 voltage channels, 0 ÷ 600 Vrms
• 4 current channels, 1 A, 5 A
• Power quality measurement according to IEC 61000-4-30, Class A
• Harmonic measurement according to 61000-4-7
• Flicker measurement according to IEC 61000-4-15

Equipment for electronic measurements

Laboratory inventory includes standard equipment for electronic measurements (analog and digital oscilloscopes, arbitrary waveform generators, DMMs, power supplies, DAQ devices). List of some laboratory equipment follows.

Agilent 4395A 10-500 MHz Network/Spectrum/Impedance Analyzer

Device characteristics:

• Network Analyzer:
  • Frequency bandwidth: 10 Hz to 500 MHz
  • Dynamic range: 115 dB @ 10 Hz IFBW
  • Accuracy: +/-0.05 dB, +/-0.3 degree
• Spectrum Analyzer:
  • Frequency bandwidth:10 Hz to 500 MHz
  • Sensitivity: -145 dBm/Hz @ 10 MHz
• Impedance Analyzer (Option 4395A-010)
  • Frequency bandwidth: 100 kHz to 500 MHz
  • Equivalent circuit analyses function: +/- 40 V or +/- 100 mA DC bias (Option 4395A-001)

Oscilloscope Rigol DS1054

Device characteristics:

• Analog channel bandwidth: 100 MHz, 70 MHz, 50 MHz
• 4 analog channels
• 16 digital channels
• Real-time sample rate up to 1 GSa/s
• Memory depth up to 24 Mpts, up to 30,000 wfms/s waveform capture rate, up to 60,000 frames hardware real-time waveform recording and playback functions
• Low noise floor, vertical scale range: 1 mV/div to 10 V/div
• Built-in dual-channel 25 MHz function/arbitrary waveform generator
• Various interfaces: USB Host&Device, LAN (LXI), AUX
• 7 inch WVGA (800×480) TFT LCD, intensity graded color display

Red Pitaya boards

Device characteristics:

• Processor: DUAL CORE ARM CORTEX A9 DUAL CORE ARM CORTEX A9
• FPGA: Xilinx Zynq 7010 SOC
• RAM: 512MB (4Gb)
• System memory: Micro SD up to 32GB
• RF input channels: 2
• Sample rate: 125 MS/s
• Resolution:14 bit
• Input impedance: 1MOhm/10pF
• Full scale voltage range : +-20 V
• RF output channels: 2
• Sample rate: 125 MS/s
• DAC resolution: 14 bit
• Applications: oscilloscope, spectrum analyzer, LCR meter, Bode analyzer, logic analyzer, function generator
• Development tools: Matlab, LabVIEW, Jupyter/ python

Multifunctional I/O device NI USB 6251

Device characteristics:

• Analog input: 16 AI, 16-Bit, 1.25 MS/s
• Analog output: 2 AO, 2.86 MS/s
• Digital IO lines: 24 DIO