Ultrazvukový anemometr

| Kategorie: Diplomové, bakalářské práce  | Tento dokument chci!

Práce popisuje principy a problémy při realizaci ultrazvukového anemometru. Je popsán princip výpočtu rychlosti větru a následné korekce výpočtu. Pro realizaci jsou využity ultrazvukové sensory a microcontrolér ARM Cortex-M3. Práce se zabývá generováním PWM signálu, jeho analogovou filtrací, zesílením a odvysíláním. Na přijímací straně jeto nízkonapěťový zesilovač a komparátor. Vyvíjený kód je popsán pomocí vývojového diagramu.

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.......................viii Introduction............................................TABLE CONTENT List Images.......3 Code development.....19 4.........................2 evaluation board......................................................3 Amplification received signal and comparator.................................................................1 Printed circuit board..............................................................................................................7 2..............3 Microcontroller..................................................................................................................1 1 Theoretical background..........................1 Description Probe.............20 4.................................................6 Voltage inverter...........................................................................................................................................................................4 Non-inverting operational amplifier...............................................................10 2..2 1....2 Oscilloscope captures.......................................1 Header files, Global variable and Defines.1 Correction speed........................................................................................................3 2 Component description.................4 Flowcharts...............................................23 ............2 Interrupt handler functions...........................................................................21 4.......................16 4 Implementation.............9 2.......................................................................14 3..................................................13 3....6 2........................................................22 4...........................................2 PWM filter and amplifier....................3 Main function............1 Main Objective..............5 2...........................................................................1 Murata ultrasonic sensors................................................11 3 Analysis and Design.......................................................................................................2 1......21 4............1 Block diagram.........................................................................19 4..............................................................................13 3...............................................................8 2............................................................................................................3 Measured wind speed and airspeed vectors...............................5 Comparator.................................................2 1..........4...................................................................5 2.................................................................................................................................4..................21 4.....................................7 Temperature sensor.......................4...........................................................2 Time delay windy conditions and wind speed....................

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