BMETE11AF30

Course data
Course name: Measurement Techniques
Neptun ID: BMETE11AF30
Responsible teacher: András Halbritter
Programme: BSc Physics
Course data sheet: BMETE11AF30
Requirements, Informations

Informations

See the Hungarian course page for more information.

SYLLABUS IN ENGLISH

  • Voltage and current sources, dissipative and switching mode power supplies. Voltage and current meters. Measurement of resistance, four probe resistance measurement.
  • Instrumentation amplifier, voltage amplifier, current amplifier and comparator circuits. A/D and D/A converters, data acquisition cards. Normal and common mode rejection ratio.
  • Analog and digital oscilloscopes, sampling modes, triggering, waveform measurements, aliasing. Function generators. *Suppression of disturbing signals: electrostatic and inductive coupling, grounding and guarding, twisted pairs, thermo electric power and offset compensation, stray capacitance.
  • Surprising experiments in high frequency circuits: wave propagation in coaxial lines, telegraph equations, reflections at the cable termination.
  • Fourier analysis considering finite temporal window. The role of various window functions: spectral leakage, frequency resolution, amplitude accuracy. The role of finite sampling, sampling theorem. Discrete Fourier transform, and its implementation by the fast Fourier transform algorithm. Spectrum analyzers: FFT, swept tuned and hybrid devices.
  • Phase sensitive measurements: lock-in amplifiers, phase locked loops.
  • The application of PID control from temperature controllers to scanning probe microscopes.
  • Electronic noise phenomena. The spectral density of noise, and its relation to the current-current correlation functiond the Fourier transform of the signal. Thermal noise, the thermal noise limit of current amplifier circuits. Cross correlation noise measurement.
  • Fundamental measurement units (SI) and their definitions. Measurement standards: atomic clocks, voltage to frequency conversion by the Josephson effect, current to voltage conversion by the quantized Hall effect, current to frequency conversion by electron pump, measurement of mass by Watt balance and by the Avogadro project. Measurement of temperature by the speed of soumd and the thermal noise.
  • Modern sensors. Magnetic field sensors: inductive, magnetoresitive, spin valve, and Hall sensors, SQUID magnetometers. Distance and position sensors: linear differential transformers, capacitive tansducers, LASER and ultrasound based measurement of distance, LIDAR systems. Temperature sensors: thermocouples, resistance thermometers, thermistors. Light sensors: photo diodes, CCD sensors, CMOS active pixel sensors, bolometers. Measurement of acceleration: MEMS accelerometers and gyroscopes, piezoelectric accelerometers.