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Explanatory Notes
Instructions
Web page:
https://moodle.fel.cvut.cz/courses/B2B38EMB
Anotation:
Methods of measurement of electrical quantities (voltage, current, power, frequency, resistance, capacitance, and inductance) are explained together with principles of their correct application and accuracy estimation. The course is closed by presenting information on several basic electronic measuring instruments and explaining the fundamentals of magnetic measurements and basic information concerning measurement systems.
Study targets:
To acquaint students with methods of measurement of electric, magnetic and selected physical quantities and used instruments including principles of their correct application and accuracy estimation.
Content:
The principle of measuring methods of electrical quantities (voltage, current, power, frequency, resistance, capacitance, and inductance) and magnetic measurements are explained in lectures. An integral part of lecturers is also an explanation of principles of AD and DA converters, circuits for analog processing measuring signals including selected sensors. The knowledge gains in lectures are practically verified in 17 laboratory tasks and final individual work.
Course outlines:
| 1. | | Introduction - measuring chain, the accuracy of measurement - evaluation of uncertainties of direct and indirect measurements, the error of method and its correction. |
| 2. | | Instruments for voltage and current measurement. |
| 3. | | Measuring amplifiers with OA, converters of average and of RMS value, phase-sensitive rectifier. |
| 4. | | Converters for sum and difference measurement, analog multipliers, measurement of frequency and phase shift. |
| 5. | | AC or DC current and voltage measurement - standards, methods, and instruments |
| 6. | | Principle of sampling and quantization of analog signal, DACs, and ADCs - principle, and properties. |
| 7. | | Measurement of resistance - converter R - U; methods for low and high resistance measurement, unbalanced Wheatstone bridge for sensor application. |
| 8. | | Present-day digital multimeters, common mode rejection, the principle of autocalibration and software calibration. |
| 9. | | Measurement of power - definition, measuring methods, digital wattmeter; measurement of energy consumption. |
| 10. | | Measurement of impedance and admittance in LF range - bridges, the principle of digital LCR meters. |
| 11. | | Measurement of DC and LF magnetic field, measurement of parameters and characteristics of ferromagnetic materials. |
| 12. | | Analog and digitizing oscilloscopes, passive oscilloscope probe. |
| 13. | | LF generators of measuring signals. |
| 14. | | Data acquisition systems - overview and application, GP-IB measuring system, DAQ systems based on plug-in boards, software for DAQ systems - an overview. |
Exercises outline:
| 1. | | Measurement using laboratory oscilloscope |
| 2. | | Frequency dependence of AC voltmeters |
| 3. | | Measurement on the voltage divider |
| 4. | | Measurement of low currents |
| 5. | | Measuring amplifiers |
| 6. | | Influence of the waveform of measured voltage on the meter reading |
| 7. | | Measuring rectifier |
| 8. | | Power and power factor measurement for single phase |
| 9. | | Measurement of frequency and period time using a counter |
| 10. | | Demonstration of signal sampling |
| 11. | | Digital storage oscilloscope and arbitrary waveform generator |
| 12. | | Measurement of low resistances |
| 13. | | Digital measurement system using GPIB |
| 14. | | Digital impedance and admittance meter |
| 15. | | Measurement of amplitude permeability |
| 16. | | Unbalanced Wheatstone bridge |
| 17. | | Measurement of the leakage magnetic field |
Individual work
Literature:
| [1] | | Placko, D.: Fundamentals of Instrumentation and Measurement, ISTE 2007, ISBN 1 905209 39 8 |
| [2] | | Northrop, R.B.: Introduction to Instrumentation and Measurements, CRC 2005, 0-8493-3773-9 |
Requirements:
Physics 1, Fundamentals of Electric Circuits
Keywords:
Measurement, instrumentation, electrical quantity, magnetic quantity, measuring instrument, measuring method
Subject is included into these academic programs:
| Page updated 16.4.2024 17:53:17, semester: Z,L/2023-4, Z/2024-5, Send comments about the content to the Administrators of the Academic Programs |
Proposal and Realization: I. Halaška (K336), J. Novák (K336) |