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

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