A5080464232- Advanced Electrical Measurement Techniques
- Sensor Technology and Measurement Systems
- Advanced Sensor Technologies Research
- Electrical and Bioimpedance Tomography
- Advancements in PLL and VCO Technologies
- Power Quality and Harmonics
- Advanced Chemical Sensor Technologies
- Spectroscopy and Chemometric Analyses
- Advanced MEMS and NEMS Technologies
- Magnetic Properties and Applications
- Analog and Mixed-Signal Circuit Design
- Power Transformer Diagnostics and Insulation
- Experimental Learning in Engineering
- Electrostatic Discharge in Electronics
- Radio Astronomy Observations and Technology
- Antenna Design and Optimization
- Insect and Pesticide Research
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Non-Destructive Testing Techniques
- Control Systems and Identification
- Fault Detection and Control Systems
- Material Properties and Processing
- Fuel Cells and Related Materials
- Geotechnical and Mining Engineering
University of Zielona Góra
2012-2023
This paper characterizes the metrological properties of a dual-channel high-resolution digitizer designed for use in system to calibrate standard resistors with values between 1 m Ω and 10 at frequencies from 40 Hz kHz. The possibility using measure complex voltage ratio is analyzed both operating modes: mode simultaneous sampling single-channel sequential which an additional external multiplexer used. method acquiring samples presented this was used investigate compare short-time stability...
This paper presents a digital automatic unbalanced bridge designed for comparing the impedances of R-R, R-C, and C-C. The measurement principle uses initial balancing using two sine wave sources, then measuring ratio voltage drops on compared as well finite unbalance voltage. present method is novel because it not necessary to obtain complete nulling also readily implemented with commercial data acquisition (DAQ) card. An NI USB6281 DAQ card was used results; this combines 16-bit...
Fully digital impedance bridges are emerging as measuring instruments for primary electrical metrology and the realization of units scales. This article presents a comprehensive analysis electronic fully both generating (based on digital-to-analog converters) digitizing analog-to-digital bridges. The sources measurement error analyzed in detail expressed by explicit mathematical formulas ready to be applied specific bridge case interest. same can employed also basis optimize design operating...
This paper presents a sampling measurement system designed to compare ac standard resistors within range from 1 mΩ 10 Ω at frequencies ranging 40 Hz kHz and for currents up A. The allows simultaneous of both components impedance the calibrated resistor relative reference resistor. Built on basis commercial PXI modules, complemented by modules developed authors, stands out relatively simple structure fully automatic operation. In order reduce impact parasitic impedances comparison accuracy,...
A computer-based automatic alternating current (ac) bridge for impedance measurement is proposed. The problem of formulated as a linear-in-parameter estimation one, and suitable algorithm proposed that ensures high accuracy under convergence rate. In particular, the optimum experimental conditions regarding reference resistance sampling time are developed. These guarantee performed with possibly accuracy. This paper also shows how to use approach fault detection, which very important from...
The "Automated impedance metrology extending the quantum toolbox for electricity" project (AIM QuTE) will extend Josephson bridges capabilities to whole complex plane with best level of uncertainties (0.05 ppm). In parallel, fully digital be developed reduce operator workload imposed on national institutes realisation impedances scales and calibrations. target uncertainty these is parts in 10−7. Furthermore, sub-pF standards establish traceability very small capacitances. An electronic...
Multichannel digital sinewave generators play a key role in automated impedance bridges. Along with the technological progress development of commercial data acquisition (DAQ) boards, which brings it improvements their metrological and functional properties, is possible to realize DAQ-based high-precision multichannel generators. This paper describes evaluation properties three DAQs, available form PCI eXtensions for Instrumentation modules working as two-channel supervised by software...
In this study, an attempt was made to evaluate very small water content (below 0.05% in volume) the ‘20–30’ mineral oil using both electrochemical impedance spectroscopy (EIS) and dielectric constant calculation based on measured values. Measurements were performed with use of laboratory EIS system designed verify experimentally that it is possible develop IS‐based measuring would be able work situ, relatively cheap fast alternative compared systems widely used nowadays. Known amounts added...
The paper characterizes selected properties of a dual-channel digitizer designed for low value resistor calibration system working in the frequency range from 40 Hz to 10 kHz. There are presented experimentally determined characteristics magnitude and phase complex voltage ratio, as well research results linearity measurement accuracy.
This paper describes the comparison of properties three commercially available multiphase digital ac voltage sources made as PXI modules. The research concerned their two-phase configuration for use in impedance bridges. Considering assumed field application, most important parameters like stability amplitude ratio and phase difference well total harmonic distortion spurious-free dynamic range was examined.
This paper describes a new measuring method of digital signal processing for detecting bee swarm phenomenon. The uses comparison the similarity between estimated distribution unknown sound samples with some pattern distributions known samples. value was determined using statistical tools. tested in MATLAB and its results were compared well-known classification diagnostic space state. All calculations made on recorded, real sounds. After testing MATLAB, successfully implemented prototype...
The core objective of EMPIR project 17RPT04 VersICaL is to improve the European measurement infrastructure for electrical impedance, with particular emphasis on capabilities developing NMIs and calibration centres. will seek exploit results existing research digital impedance bridges (DIBs) by designing, constructing validating simple, affordable versions suitable realise scale in range 1 nF 10 μF mH H relative uncertainties -5 -6 . first project, including bridge designs details a polyphase...
This article presents the concept and some aspects of physical implementation a virtual training laboratory (VTL) in field primary impedance metrology. The creation VTL provides novel method disseminating metrological knowledge expertise practical way at low cost. It will expose new users to live experience operating digital bridge thus helping encourage uptake this useful measurement technology. was developed as part EMPIR projects VersICal 17RPT04, A versatile electrical calibration based...
We present here a comprehensive analysis of the error sources in electronic fully-digital impedance bridges, for both sourcing and digitizing bridges. This work can be used as basis to optimize design operating parameters digital evaluation uncertainty.
In intelligent transportation, various types of sensors are used both in traffic control systems as well the control, safety, and entertainment vehicles themselves. process educating future designers developers such systems, it is necessary to familiarize them with operation parameters sensors. The recent years COVID-19 pandemic have disturbed this due need conduct classes remotely. This article presents general concept a laboratory stand for testing electrical non-electrical quantities,...
High-resolution multiplying digital-to-analog converters (MDACs) are often used as digitally controlled AC voltage dividers in precise instruments and measurement systems. Proper application of these requires knowledge their parameters, especially amplitude phase errors, which usually not specified by MDAC manufacturers. The paper presents errors selected commercial 16- I8-bit MDACs measured with a dedicated sampling system. These were determined function frequency the divided sinusoidal...
High-resolution multiplying digital-to-analog converters (MDACs) are often used as digitally controlled ac voltage dividers in precise instruments and measurement systems. Proper application of these requires knowledge their parameters, especially amplitude phase errors, which usually not specified by MDAC manufacturers. This paper presents the results investigations ratio errors well time stability shift selected commercial 16- 18-bit MDACs. These parameters were measured with a dedicated...