Fundamentals of Electronic Measurements and Instrumentation
Basic understanding of electronic measurement channel concept, knowledge of selection of its components as well as of impact of interferences and noise. Practical experience on a real implementation.
- apply electronic measurement equipment
- describe electronic measurement channel and define it’s key parameters
- select mode of connecting signal source to measurement channel
- explain influence of interference and noise and estimate their impact
- employ various sensors
- estimate parameters of a voltage reference
- select an analog to digital converter and estimate the device error
Forms of Teaching
Three hours lectures per week for 15 weeks.Exams
There are short written tests on each laboratory exercise. Mid exam is written and final exam has written and oral part. Students who do not pass through continuous tests can take a written and oral exam at the end of semester.Exercises
Tutorials cover numerical examples from the various course topics, as well as preparation for laboratory exercises. The tutorials are held for one additional academic hour per week.Laboratory Work
Laboratory exercises provide hands-on experience on practical implementation of the basic concepts. There are 6 laboratory exercises. The first two deal with laboratory instruments and electromagnetic interferences. The rest cover details of electronic measurement channel on s digital balance.Consultations
Students have weekly scheduled consultations with both professor and assistant.Other
Two home works are given as preparation for written exams.
|Type||Threshold||Percent of Grade||Comment:||Percent of Grade|
|Laboratory Exercises||0 %||20 %||0 %||20 %|
|Mid Term Exam: Written||0 %||25 %||0 %|
|Final Exam: Written||0 %||25 %|
|Final Exam: Oral||30 %|
|Exam: Written||50 %||40 %|
|Exam: Oral||40 %|
Student must complete all laboratory exercises.
Week by Week Schedule
- Electronic measurements and electronic measurement systems. Basic concepts: accuracy, precision, sensitivity, measurement uncertainty.
- Electronic measurement channel. Functional elements. Sensor. Signal conditioning and analog processing. Analog-to-digital conversion. Voltage references. Static and dynamic characteristics.
- Grounding. Types of signal sources (asymmetric, differential, floating) and their connection to a measurement circuit. Common and serial interference. Common mode rejection ratio.
- Electromagnetic interference. Sources, kinds of coupling and reduction of the influence on sensor signals.
- Measurement of voltage and current. Measurement of time and frequency. Digital multimeter. Analog and digital oscilloscope.
- Sensors, part 1: resistive temperature detectors, thermistors, strain gauges. Capacitive and inductive sensors. Principle of operation and connection to measurement circuit.
- Sensors part 2: piezoelectric sensors, thermocouple, photodiode, Hall sensor. Principle of operation and connection to measurement circuit.
- Mid term exam - written
- Amplifiers, part 1: operational amplifier, basic parameters. Offset. Slew-rate. Basic asymmetric amplifier circuits.
- Amplifiers, part 2: analysis of differential amplifier, common mode rejection ratio. Instrumentation amplifier, topologies and parameters.
- Physical origin and kinds of noise. Noise parameters. Thermal noise. Shot noise. 1/f noise. Amplifier equivalent circuit and total output noise. Signal to noise ratio.
- Voltage references in electronic measurement channel. Specification of a voltage reference. Basic topologies of the Zenner and bandgap based voltage references.
- Analog-to-digital conversion, part 1: signal sampling and quantization. Sampling frequnecy selection, aliasing. Sample and hold circuit analysis. Quantization error and quantization noise. Oversampling and quantization noise filtering, increase in ADC’s resolution.
- Analog-to-digital conversion, part 2: quantizator static characteristic, INL, DNL. ENOB. Selection of an ADC. ADC basic topologies: flash converter, successive approximation converter, voltage to frequency converter, two slope converter, delta-sigma converter. Interconnecting ADC to a microcontroller. Measurement data transmission and vizualization.
- Final exam - written and oral